Move C-state name cleaning to agent for smaller JSON

- Agent now extracts "C" + digits pattern (C3, C10) using char parsing
- Removes suffixes like "_ACPI", "_MWAIT" at source
- Reduces JSON payload size over ZMQ
- No regex dependency - uses fast char iteration (~1μs overhead)
- Robust fallback to original name if pattern not found
- Dashboard simplified to use clean names directly

Bump version to v0.1.212

Co-Authored-By: Claude <noreply@anthropic.com>

Cargo.lock

@@ -279,7 +279,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.183"
+version = "0.1.211"
 dependencies = [
  "anyhow",
  "chrono",
@@ -301,7 +301,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.183"
+version = "0.1.211"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -324,7 +324,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.183"
+version = "0.1.211"
 dependencies = [
  "chrono",
  "serde",

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.184"
+version = "0.1.212"
 edition = "2021"
 
 [dependencies]

agent/src/agent.rs

@@ -4,7 +4,7 @@ use std::time::Duration;
 use tokio::time::interval;
 use tracing::{debug, error, info};
 
-use crate::communication::{AgentCommand, ZmqHandler};
+use crate::communication::ZmqHandler;
 use crate::config::AgentConfig;
 use crate::collectors::{
     Collector,
@@ -114,7 +114,7 @@ impl Agent {
 
         // Set up intervals
         let mut transmission_interval = interval(Duration::from_secs(
-            self.config.collection_interval_seconds,
+            self.config.zmq.transmission_interval_seconds,
         ));
         let mut notification_interval = interval(Duration::from_secs(30)); // Check notifications every 30s
 
@@ -134,12 +134,6 @@ impl Agent {
                     // NOTE: With structured data, we might need to implement status tracking differently
                     // For now, we skip this until status evaluation is migrated
                 }
-                // Handle incoming commands (check periodically)
-                _ = tokio::time::sleep(Duration::from_millis(100)) => {
-                    if let Err(e) = self.handle_commands().await {
-                        error!("Error handling commands: {}", e);
-                    }
-                }
                 _ = &mut shutdown_rx => {
                     info!("Shutdown signal received, stopping agent loop");
                     break;
@@ -259,36 +253,4 @@ impl Agent {
         Ok(())
     }
 
-    /// Handle incoming commands from dashboard
-    async fn handle_commands(&mut self) -> Result<()> {
-        // Try to receive a command (non-blocking)
-        if let Ok(Some(command)) = self.zmq_handler.try_receive_command() {
-            info!("Received command: {:?}", command);
-
-            match command {
-                AgentCommand::CollectNow => {
-                    info!("Received immediate collection request");
-                    if let Err(e) = self.collect_and_broadcast().await {
-                        error!("Failed to collect on demand: {}", e);
-                    }
-                }
-                AgentCommand::SetInterval { seconds } => {
-                    info!("Received interval change request: {}s", seconds);
-                    // Note: This would require more complex handling to update the interval
-                    // For now, just acknowledge
-                }
-                AgentCommand::ToggleCollector { name, enabled } => {
-                    info!("Received collector toggle request: {} -> {}", name, enabled);
-                    // Note: This would require more complex handling to enable/disable collectors
-                    // For now, just acknowledge
-                }
-                AgentCommand::Ping => {
-                    info!("Received ping command");
-                    // Maybe send back a pong or status
-                }
-            }
-        }
-        Ok(())
-    }
-
 }

agent/src/collectors/cpu.rs

@@ -119,36 +119,69 @@ impl CpuCollector {
         utils::parse_u64(content.trim())
     }
 
-    /// Collect CPU frequency and populate AgentData
-    async fn collect_frequency(&self, agent_data: &mut AgentData) -> Result<(), CollectorError> {
-        // Try scaling frequency first (more accurate for current frequency)
-        if let Ok(freq) =
-            utils::read_proc_file("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq")
-        {
-            if let Ok(freq_khz) = utils::parse_u64(freq.trim()) {
-                let freq_mhz = freq_khz as f32 / 1000.0;
-                agent_data.system.cpu.frequency_mhz = freq_mhz;
-                return Ok(());
-            }
-        }
+    /// Collect CPU C-state (idle depth) and populate AgentData with top 3 C-states by usage
+    async fn collect_cstate(&self, agent_data: &mut AgentData) -> Result<(), CollectorError> {
+        // Read C-state usage from first CPU (representative of overall system)
+        // C-states indicate CPU idle depth: C1=light sleep, C6=deep sleep, C10=deepest
 
-        // Fallback: parse /proc/cpuinfo for base frequency
-        if let Ok(content) = utils::read_proc_file("/proc/cpuinfo") {
-            for line in content.lines() {
-                if line.starts_with("cpu MHz") {
-                    if let Some(freq_str) = line.split(':').nth(1) {
-                        if let Ok(freq_mhz) = utils::parse_f32(freq_str) {
-                            agent_data.system.cpu.frequency_mhz = freq_mhz;
-                            return Ok(());
+        let mut cstate_times: Vec<(String, u64)> = Vec::new();
+        let mut total_time: u64 = 0;
+
+        // Collect all C-state times from CPU0
+        for state_num in 0..=10 {
+            let time_path = format!("/sys/devices/system/cpu/cpu0/cpuidle/state{}/time", state_num);
+            let name_path = format!("/sys/devices/system/cpu/cpu0/cpuidle/state{}/name", state_num);
+
+            if let Ok(time_str) = utils::read_proc_file(&time_path) {
+                if let Ok(time) = utils::parse_u64(time_str.trim()) {
+                    if let Ok(name) = utils::read_proc_file(&name_path) {
+                        let state_name = name.trim();
+                        // Skip POLL state (not real idle)
+                        if state_name != "POLL" && time > 0 {
+                            // Extract "C" + digits pattern (C3, C10, etc.) to reduce JSON size
+                            // Handles formats like "C3_ACPI", "C10_MWAIT", etc.
+                            let clean_name = if let Some(c_pos) = state_name.find('C') {
+                                let rest = &state_name[c_pos + 1..];
+                                let digit_count = rest.chars().take_while(|c| c.is_ascii_digit()).count();
+                                if digit_count > 0 {
+                                    state_name[c_pos..c_pos + 1 + digit_count].to_string()
+                                } else {
+                                    state_name.to_string()
+                                }
+                            } else {
+                                state_name.to_string()
+                            };
+                            cstate_times.push((clean_name, time));
+                            total_time += time;
                         }
                     }
-                    break; // Only need first CPU entry
                 }
+            } else {
+                // No more states available
+                break;
             }
         }
 
-        debug!("CPU frequency not available");
-        // Leave frequency as 0.0 if not available
+        // Sort by time descending to get top 3
+        cstate_times.sort_by(|a, b| b.1.cmp(&a.1));
+
+        // Calculate percentages for top 3 and populate AgentData
+        agent_data.system.cpu.cstates = cstate_times
+            .iter()
+            .take(3)
+            .map(|(name, time)| {
+                let percent = if total_time > 0 {
+                    (*time as f32 / total_time as f32) * 100.0
+                } else {
+                    0.0
+                };
+                cm_dashboard_shared::CStateInfo {
+                    name: name.clone(),
+                    percent,
+                }
+            })
+            .collect();
+
         Ok(())
     }
 }
@@ -165,8 +198,8 @@ impl Collector for CpuCollector {
         // Collect temperature (optional)
         self.collect_temperature(agent_data).await?;
 
-        // Collect frequency (optional)
-        self.collect_frequency(agent_data).await?;
+        // Collect C-state (CPU idle depth)
+        self.collect_cstate(agent_data).await?;
 
         let duration = start.elapsed();
         debug!("CPU collection completed in {:?}", duration);

agent/src/collectors/disk.rs

@@ -112,9 +112,12 @@ impl DiskCollector {
 
     /// Get block devices and their mount points using lsblk
     async fn get_mount_devices(&self) -> Result<HashMap<String, String>, CollectorError> {
-        let output = Command::new("lsblk")
-            .args(&["-rn", "-o", "NAME,MOUNTPOINT"])
-            .output()
+        use super::run_command_with_timeout;
+
+        let mut cmd = Command::new("lsblk");
+        cmd.args(&["-rn", "-o", "NAME,MOUNTPOINT"]);
+
+        let output = run_command_with_timeout(cmd, 2).await
             .map_err(|e| CollectorError::SystemRead {
                 path: "block devices".to_string(),
                 error: e.to_string(),
@@ -186,8 +189,8 @@ impl DiskCollector {
 
     /// Get filesystem info for a single mount point
     fn get_filesystem_info(&self, mount_point: &str) -> Result<(u64, u64), CollectorError> {
-        let output = Command::new("df")
-            .args(&["--block-size=1", mount_point])
+        let output = std::process::Command::new("timeout")
+            .args(&["2", "df", "--block-size=1", mount_point])
             .output()
             .map_err(|e| CollectorError::SystemRead {
                 path: format!("df {}", mount_point),
@@ -413,6 +416,8 @@ impl DiskCollector {
 
     /// Get SMART data for a single drive
     async fn get_smart_data(&self, drive_name: &str) -> Result<SmartData, CollectorError> {
+        use super::run_command_with_timeout;
+
         // Use direct smartctl (no sudo) - service has CAP_SYS_RAWIO and CAP_SYS_ADMIN capabilities
         // For NVMe drives, specify device type explicitly
         let mut cmd = Command::new("smartctl");
@@ -422,7 +427,7 @@ impl DiskCollector {
             cmd.args(&["-a", &format!("/dev/{}", drive_name)]);
         }
 
-        let output = cmd.output()
+        let output = run_command_with_timeout(cmd, 3).await
             .map_err(|e| CollectorError::SystemRead {
                 path: format!("SMART data for {}", drive_name),
                 error: e.to_string(),
@@ -757,9 +762,9 @@ impl DiskCollector {
 
     /// Get drive information for a mount path
     fn get_drive_info_for_path(&self, path: &str) -> anyhow::Result<PoolDrive> {
-        // Use lsblk to find the backing device
-        let output = Command::new("lsblk")
-            .args(&["-rn", "-o", "NAME,MOUNTPOINT"])
+        // Use lsblk to find the backing device with timeout
+        let output = Command::new("timeout")
+            .args(&["2", "lsblk", "-rn", "-o", "NAME,MOUNTPOINT"])
             .output()
             .map_err(|e| anyhow::anyhow!("Failed to run lsblk: {}", e))?;
             

agent/src/collectors/memory.rs

@@ -105,12 +105,12 @@ impl MemoryCollector {
             return Ok(());
         }
 
-        // Get usage data for all tmpfs mounts at once using df
-        let mut df_args = vec!["df", "--output=target,size,used", "--block-size=1"];
+        // Get usage data for all tmpfs mounts at once using df (with 2 second timeout)
+        let mut df_args = vec!["2", "df", "--output=target,size,used", "--block-size=1"];
         df_args.extend(tmpfs_mounts.iter().map(|s| s.as_str()));
 
-        let df_output = std::process::Command::new(df_args[0])
-            .args(&df_args[1..])
+        let df_output = std::process::Command::new("timeout")
+            .args(&df_args[..])
             .output()
             .map_err(|e| CollectorError::SystemRead {
                 path: "tmpfs mounts".to_string(),

agent/src/collectors/mod.rs

@@ -1,6 +1,8 @@
 use async_trait::async_trait;
 use cm_dashboard_shared::{AgentData};
-
+use std::process::{Command, Output};
+use std::time::Duration;
+use tokio::time::timeout;
 
 pub mod backup;
 pub mod cpu;
@@ -13,6 +15,20 @@ pub mod systemd;
 
 pub use error::CollectorError;
 
+/// Run a command with a timeout to prevent blocking
+pub async fn run_command_with_timeout(mut cmd: Command, timeout_secs: u64) -> std::io::Result<Output> {
+    let timeout_duration = Duration::from_secs(timeout_secs);
+
+    match timeout(timeout_duration, tokio::task::spawn_blocking(move || cmd.output())).await {
+        Ok(Ok(result)) => result,
+        Ok(Err(e)) => Err(std::io::Error::new(std::io::ErrorKind::Other, e)),
+        Err(_) => Err(std::io::Error::new(
+            std::io::ErrorKind::TimedOut,
+            format!("Command timed out after {} seconds", timeout_secs)
+        )),
+    }
+}
+
 
 /// Base trait for all collectors with direct structured data output
 #[async_trait]

agent/src/collectors/network.rs

@@ -51,7 +51,7 @@ impl NetworkCollector {
 
     /// Get the primary physical interface (the one with default route)
     fn get_primary_physical_interface() -> Option<String> {
-        match Command::new("ip").args(["route", "show", "default"]).output() {
+        match Command::new("timeout").args(["2", "ip", "route", "show", "default"]).output() {
             Ok(output) if output.status.success() => {
                 let output_str = String::from_utf8_lossy(&output.stdout);
                 // Parse: "default via 192.168.1.1 dev eno1 ..."
@@ -110,7 +110,7 @@ impl NetworkCollector {
         // Parse VLAN configuration
         let vlan_map = Self::parse_vlan_config();
 
-        match Command::new("ip").args(["-j", "addr"]).output() {
+        match Command::new("timeout").args(["2", "ip", "-j", "addr"]).output() {
             Ok(output) if output.status.success() => {
                 let json_str = String::from_utf8_lossy(&output.stdout);
 

agent/src/collectors/nixos.rs

@@ -43,8 +43,8 @@ impl NixOSCollector {
         match fs::read_to_string("/etc/hostname") {
             Ok(hostname) => Some(hostname.trim().to_string()),
             Err(_) => {
-                // Fallback to hostname command
-                match Command::new("hostname").output() {
+                // Fallback to hostname command (with 2 second timeout)
+                match Command::new("timeout").args(["2", "hostname"]).output() {
                     Ok(output) => Some(String::from_utf8_lossy(&output.stdout).trim().to_string()),
                     Err(_) => None,
                 }

agent/src/collectors/systemd.rs

@@ -43,9 +43,10 @@ struct ServiceCacheState {
 /// Cached service status information from systemctl list-units
 #[derive(Debug, Clone)]
 struct ServiceStatusInfo {
-    load_state: String,
     active_state: String,
-    sub_state: String,
+    memory_bytes: Option<u64>,
+    restart_count: Option<u32>,
+    start_timestamp: Option<u64>,
 }
 
 impl SystemdCollector {
@@ -86,14 +87,20 @@ impl SystemdCollector {
         let mut complete_service_data = Vec::new();
         for service_name in &monitored_services {
             match self.get_service_status(service_name) {
-                Ok((active_status, _detailed_info)) => {
-                    let memory_mb = self.get_service_memory_usage(service_name).await.unwrap_or(0.0);
-                    let disk_gb = self.get_service_disk_usage(service_name).await.unwrap_or(0.0);
-                    
+                Ok(status_info) => {
                     let mut sub_services = Vec::new();
 
+                    // Calculate uptime if we have start timestamp
+                    let uptime_seconds = status_info.start_timestamp.and_then(|start| {
+                        let now = std::time::SystemTime::now()
+                            .duration_since(std::time::UNIX_EPOCH)
+                            .ok()?
+                            .as_secs();
+                        Some(now.saturating_sub(start))
+                    });
+
                     // Sub-service metrics for specific services (always include cached results)
-                    if service_name.contains("nginx") && active_status == "active" {
+                    if service_name.contains("nginx") && status_info.active_state == "active" {
                         let nginx_sites = self.get_nginx_site_metrics();
                         for (site_name, latency_ms) in nginx_sites {
                             let site_status = if latency_ms >= 0.0 && latency_ms < self.config.nginx_latency_critical_ms {
@@ -113,11 +120,12 @@ impl SystemdCollector {
                                 name: site_name.clone(),
                                 service_status: self.calculate_service_status(&site_name, &site_status),
                                 metrics,
+                                service_type: "nginx_site".to_string(),
                             });
                         }
                     }
 
-                    if service_name.contains("docker") && active_status == "active" {
+                    if service_name.contains("docker") && status_info.active_state == "active" {
                         let docker_containers = self.get_docker_containers();
                         for (container_name, container_status) in docker_containers {
                             // For now, docker containers have no additional metrics
@@ -128,23 +136,25 @@ impl SystemdCollector {
                                 name: container_name.clone(),
                                 service_status: self.calculate_service_status(&container_name, &container_status),
                                 metrics,
+                                service_type: "container".to_string(),
                             });
                         }
 
                         // Add Docker images
                         let docker_images = self.get_docker_images();
-                        for (image_name, image_status, image_size) in docker_images {
+                        for (image_name, image_status, image_size_mb) in docker_images {
                             let mut metrics = Vec::new();
                             metrics.push(SubServiceMetric {
                                 label: "size".to_string(),
-                                value: 0.0, // Size as string in name instead
-                                unit: None,
+                                value: image_size_mb,
+                                unit: Some("MB".to_string()),
                             });
 
                             sub_services.push(SubServiceData {
-                                name: format!("{} ({})", image_name, image_size),
+                                name: image_name.to_string(),
                                 service_status: self.calculate_service_status(&image_name, &image_status),
                                 metrics,
+                                service_type: "image".to_string(),
                             });
                         }
                     }
@@ -152,11 +162,12 @@ impl SystemdCollector {
                     // Create complete service data
                     let service_data = ServiceData {
                         name: service_name.clone(),
-                        memory_mb,
-                        disk_gb,
                         user_stopped: false, // TODO: Integrate with service tracker
-                        service_status: self.calculate_service_status(service_name, &active_status),
+                        service_status: self.calculate_service_status(service_name, &status_info.active_state),
                         sub_services,
+                        memory_bytes: status_info.memory_bytes,
+                        restart_count: status_info.restart_count,
+                        uptime_seconds,
                     };
 
                     // Add to AgentData and cache
@@ -169,6 +180,10 @@ impl SystemdCollector {
             }
         }
 
+        // Sort services alphabetically by name
+        agent_data.services.sort_by(|a, b| a.name.cmp(&b.name));
+        complete_service_data.sort_by(|a, b| a.name.cmp(&b.name));
+
         // Update cached state
         {
             let mut state = self.state.write().unwrap();
@@ -247,18 +262,18 @@ impl SystemdCollector {
 
     /// Auto-discover interesting services to monitor
     fn discover_services_internal(&self) -> Result<(Vec<String>, std::collections::HashMap<String, ServiceStatusInfo>)> {
-        // First: Get all service unit files
-        let unit_files_output = Command::new("systemctl")
-            .args(&["list-unit-files", "--type=service", "--no-pager", "--plain"])
+        // First: Get all service unit files (with 3 second timeout)
+        let unit_files_output = Command::new("timeout")
+            .args(&["3", "systemctl", "list-unit-files", "--type=service", "--no-pager", "--plain"])
             .output()?;
 
         if !unit_files_output.status.success() {
             return Err(anyhow::anyhow!("systemctl list-unit-files command failed"));
         }
 
-        // Second: Get runtime status of all units
-        let units_status_output = Command::new("systemctl")
-            .args(&["list-units", "--type=service", "--all", "--no-pager", "--plain"])
+        // Second: Get runtime status of all units (with 3 second timeout)
+        let units_status_output = Command::new("timeout")
+            .args(&["3", "systemctl", "list-units", "--type=service", "--all", "--no-pager", "--plain"])
             .output()?;
 
         if !units_status_output.status.success() {
@@ -288,14 +303,13 @@ impl SystemdCollector {
             let fields: Vec<&str> = line.split_whitespace().collect();
             if fields.len() >= 4 && fields[0].ends_with(".service") {
                 let service_name = fields[0].trim_end_matches(".service");
-                let load_state = fields.get(1).unwrap_or(&"unknown").to_string();
                 let active_state = fields.get(2).unwrap_or(&"unknown").to_string();
-                let sub_state = fields.get(3).unwrap_or(&"unknown").to_string();
 
                 status_cache.insert(service_name.to_string(), ServiceStatusInfo {
-                    load_state,
                     active_state,
-                    sub_state,
+                    memory_bytes: None,
+                    restart_count: None,
+                    start_timestamp: None,
                 });
             }
         }
@@ -304,9 +318,10 @@ impl SystemdCollector {
         for service_name in &all_service_names {
             if !status_cache.contains_key(service_name) {
                 status_cache.insert(service_name.to_string(), ServiceStatusInfo {
-                    load_state: "not-loaded".to_string(),
                     active_state: "inactive".to_string(),
-                    sub_state: "dead".to_string(),
+                    memory_bytes: None,
+                    restart_count: None,
+                    start_timestamp: None,
                 });
             }
         }
@@ -338,36 +353,60 @@ impl SystemdCollector {
         Ok((services, status_cache))
     }
 
-    /// Get service status from cache (if available) or fallback to systemctl
-    fn get_service_status(&self, service: &str) -> Result<(String, String)> {
-        // Try to get status from cache first
-        if let Ok(state) = self.state.read() {
-            if let Some(cached_info) = state.service_status_cache.get(service) {
-                let active_status = cached_info.active_state.clone();
-                let detailed_info = format!(
-                    "LoadState={}\nActiveState={}\nSubState={}",
-                    cached_info.load_state,
-                    cached_info.active_state,
-                    cached_info.sub_state
-                );
-                return Ok((active_status, detailed_info));
+    /// Get service status with detailed metrics from systemctl
+    fn get_service_status(&self, service: &str) -> Result<ServiceStatusInfo> {
+        // Always fetch fresh data to get detailed metrics (memory, restarts, uptime)
+        // Note: Cache in service_status_cache only has basic active_state from discovery,
+        // with all detailed metrics set to None. We need fresh systemctl show data.
+
+        let output = Command::new("timeout")
+            .args(&[
+                "2",
+                "systemctl",
+                "show",
+                &format!("{}.service", service),
+                "--property=LoadState,ActiveState,SubState,MemoryCurrent,NRestarts,ExecMainStartTimestamp"
+            ])
+            .output()?;
+
+        let output_str = String::from_utf8(output.stdout)?;
+
+        // Parse properties
+        let mut active_state = String::new();
+        let mut memory_bytes = None;
+        let mut restart_count = None;
+        let mut start_timestamp = None;
+
+        for line in output_str.lines() {
+            if let Some(value) = line.strip_prefix("ActiveState=") {
+                active_state = value.to_string();
+            } else if let Some(value) = line.strip_prefix("MemoryCurrent=") {
+                if value != "[not set]" {
+                    memory_bytes = value.parse().ok();
+                }
+            } else if let Some(value) = line.strip_prefix("NRestarts=") {
+                restart_count = value.parse().ok();
+            } else if let Some(value) = line.strip_prefix("ExecMainStartTimestamp=") {
+                if value != "[not set]" && !value.is_empty() {
+                    // Parse timestamp to seconds since epoch
+                    if let Ok(output) = Command::new("date")
+                        .args(&["+%s", "-d", value])
+                        .output()
+                    {
+                        if let Ok(timestamp_str) = String::from_utf8(output.stdout) {
+                            start_timestamp = timestamp_str.trim().parse().ok();
+                        }
+                    }
+                }
             }
         }
 
-        // Fallback to systemctl if not in cache
-        let output = Command::new("systemctl")
-            .args(&["is-active", &format!("{}.service", service)])
-            .output()?;
-
-        let active_status = String::from_utf8(output.stdout)?.trim().to_string();
-
-        // Get more detailed info
-        let output = Command::new("systemctl")
-            .args(&["show", &format!("{}.service", service), "--property=LoadState,ActiveState,SubState"])
-            .output()?;
-
-        let detailed_info = String::from_utf8(output.stdout)?;
-        Ok((active_status, detailed_info))
+        Ok(ServiceStatusInfo {
+            active_state,
+            memory_bytes,
+            restart_count,
+            start_timestamp,
+        })
     }
 
     /// Check if service name matches pattern (supports wildcards like nginx*)
@@ -409,75 +448,6 @@ impl SystemdCollector {
         true
     }
 
-    /// Get disk usage for a specific service
-    async fn get_service_disk_usage(&self, service_name: &str) -> Result<f32, CollectorError> {
-        // Check if this service has configured directory paths
-        if let Some(dirs) = self.config.service_directories.get(service_name) {
-            // Service has configured paths - use the first accessible one
-            for dir in dirs {
-                if let Some(size) = self.get_directory_size(dir) {
-                    return Ok(size);
-                }
-            }
-            // If configured paths failed, return 0
-            return Ok(0.0);
-        }
-
-        // No configured path - try to get WorkingDirectory from systemctl
-        let output = Command::new("systemctl")
-            .args(&["show", &format!("{}.service", service_name), "--property=WorkingDirectory"])
-            .output()
-            .map_err(|e| CollectorError::SystemRead {
-                path: format!("WorkingDirectory for {}", service_name),
-                error: e.to_string(),
-            })?;
-
-        let output_str = String::from_utf8_lossy(&output.stdout);
-        for line in output_str.lines() {
-            if line.starts_with("WorkingDirectory=") && !line.contains("[not set]") {
-                let dir = line.strip_prefix("WorkingDirectory=").unwrap_or("");
-                if !dir.is_empty() && dir != "/" {
-                    return Ok(self.get_directory_size(dir).unwrap_or(0.0));
-                }
-            }
-        }
-
-        Ok(0.0)
-    }
-    
-    /// Get size of a directory in GB
-    fn get_directory_size(&self, path: &str) -> Option<f32> {
-        let output = Command::new("sudo")
-            .args(&["du", "-sb", path])
-            .output()
-            .ok()?;
-
-        if !output.status.success() {
-            // Log permission errors for debugging but don't spam logs
-            let stderr = String::from_utf8_lossy(&output.stderr);
-            if stderr.contains("Permission denied") {
-                debug!("Permission denied accessing directory: {}", path);
-            } else {
-                debug!("Failed to get size for directory {}: {}", path, stderr);
-            }
-            return None;
-        }
-
-        let output_str = String::from_utf8(output.stdout).ok()?;
-        let size_str = output_str.split_whitespace().next()?;
-        if let Ok(size_bytes) = size_str.parse::<u64>() {
-            let size_gb = size_bytes as f32 / (1024.0 * 1024.0 * 1024.0);
-            // Return size even if very small (minimum 0.001 GB = 1MB for visibility)
-            if size_gb > 0.0 {
-                Some(size_gb.max(0.001))
-            } else {
-                None
-            }
-        } else {
-            None
-        }
-    }
-
     /// Calculate service status, taking user-stopped services into account
     fn calculate_service_status(&self, service_name: &str, active_status: &str) -> Status {
         match active_status.to_lowercase().as_str() {
@@ -495,33 +465,6 @@ impl SystemdCollector {
         }
     }
 
-    /// Get memory usage for a specific service
-    async fn get_service_memory_usage(&self, service_name: &str) -> Result<f32, CollectorError> {
-        let output = Command::new("systemctl")
-            .args(&["show", &format!("{}.service", service_name), "--property=MemoryCurrent"])
-            .output()
-            .map_err(|e| CollectorError::SystemRead {
-                path: format!("memory usage for {}", service_name),
-                error: e.to_string(),
-            })?;
-
-        let output_str = String::from_utf8_lossy(&output.stdout);
-        
-        for line in output_str.lines() {
-            if line.starts_with("MemoryCurrent=") {
-                if let Some(mem_str) = line.strip_prefix("MemoryCurrent=") {
-                    if mem_str != "[not set]" {
-                        if let Ok(memory_bytes) = mem_str.parse::<u64>() {
-                            return Ok(memory_bytes as f32 / (1024.0 * 1024.0)); // Convert to MB
-                        }
-                    }
-                }
-            }
-        }
-
-        Ok(0.0)
-    }
-
     /// Check if service collection cache should be updated
     fn should_update_cache(&self) -> bool {
         let state = self.state.read().unwrap();
@@ -774,9 +717,9 @@ impl SystemdCollector {
         let mut containers = Vec::new();
 
         // Check if docker is available (cm-agent user is in docker group)
-        // Use -a to show ALL containers (running and stopped)
-        let output = Command::new("docker")
-            .args(&["ps", "-a", "--format", "{{.Names}},{{.Status}}"])
+        // Use -a to show ALL containers (running and stopped) with 3 second timeout
+        let output = Command::new("timeout")
+            .args(&["3", "docker", "ps", "-a", "--format", "{{.Names}},{{.Status}}"])
             .output();
 
         let output = match output {
@@ -815,11 +758,11 @@ impl SystemdCollector {
     }
 
     /// Get docker images as sub-services
-    fn get_docker_images(&self) -> Vec<(String, String, String)> {
+    fn get_docker_images(&self) -> Vec<(String, String, f32)> {
         let mut images = Vec::new();
-        // Check if docker is available (cm-agent user is in docker group)
-        let output = Command::new("docker")
-            .args(&["images", "--format", "{{.Repository}}:{{.Tag}},{{.Size}}"])
+        // Check if docker is available (cm-agent user is in docker group) with 3 second timeout
+        let output = Command::new("timeout")
+            .args(&["3", "docker", "images", "--format", "{{.Repository}}:{{.Tag}},{{.Size}}"])
             .output();
 
         let output = match output {
@@ -845,23 +788,54 @@ impl SystemdCollector {
             let parts: Vec<&str> = line.split(',').collect();
             if parts.len() >= 2 {
                 let image_name = parts[0].trim();
-                let size = parts[1].trim();
+                let size_str = parts[1].trim();
 
                 // Skip <none>:<none> images (dangling images)
                 if image_name.contains("<none>") {
                     continue;
                 }
 
+                // Parse size to MB (sizes come as "142MB", "1.5GB", "512kB", etc.)
+                let size_mb = self.parse_docker_size(size_str);
+
                 images.push((
-                    format!("image_{}", image_name),
-                    "active".to_string(), // Images are always "active" (present)
-                    size.to_string()
+                    image_name.to_string(),
+                    "inactive".to_string(), // Images are informational - use inactive for neutral display
+                    size_mb
                 ));
             }
         }
 
         images
     }
+
+    /// Parse Docker size string to MB
+    fn parse_docker_size(&self, size_str: &str) -> f32 {
+        let size_upper = size_str.to_uppercase();
+
+        // Extract numeric part and unit
+        let mut num_str = String::new();
+        let mut unit = String::new();
+
+        for ch in size_upper.chars() {
+            if ch.is_ascii_digit() || ch == '.' {
+                num_str.push(ch);
+            } else if ch.is_alphabetic() {
+                unit.push(ch);
+            }
+        }
+
+        let value: f32 = num_str.parse().unwrap_or(0.0);
+
+        // Convert to MB
+        match unit.as_str() {
+            "KB" | "K" => value / 1024.0,
+            "MB" | "M" => value,
+            "GB" | "G" => value * 1024.0,
+            "TB" | "T" => value * 1024.0 * 1024.0,
+            _ => value, // Assume bytes if no unit
+        }
+    }
 }
 
 #[async_trait]

agent/src/communication/mod.rs

@@ -5,10 +5,9 @@ use zmq::{Context, Socket, SocketType};
 
 use crate::config::ZmqConfig;
 
-/// ZMQ communication handler for publishing metrics and receiving commands
+/// ZMQ communication handler for publishing metrics
 pub struct ZmqHandler {
     publisher: Socket,
-    command_receiver: Socket,
 }
 
 impl ZmqHandler {
@@ -26,20 +25,8 @@ impl ZmqHandler {
         publisher.set_sndhwm(1000)?; // High water mark for outbound messages
         publisher.set_linger(1000)?; // Linger time on close
 
-        // Create command receiver socket (PULL socket to receive commands from dashboard)
-        let command_receiver = context.socket(SocketType::PULL)?;
-        let cmd_bind_address = format!("tcp://{}:{}", config.bind_address, config.command_port);
-        command_receiver.bind(&cmd_bind_address)?;
-
-        info!("ZMQ command receiver bound to {}", cmd_bind_address);
-
-        // Set non-blocking mode for command receiver
-        command_receiver.set_rcvtimeo(0)?; // Non-blocking receive
-        command_receiver.set_linger(1000)?;
-
         Ok(Self {
             publisher,
-            command_receiver,
         })
     }
 
@@ -65,36 +52,4 @@ impl ZmqHandler {
         Ok(())
     }
 
-    /// Try to receive a command (non-blocking)
-    pub fn try_receive_command(&self) -> Result<Option<AgentCommand>> {
-        match self.command_receiver.recv_bytes(zmq::DONTWAIT) {
-            Ok(bytes) => {
-                debug!("Received command message ({} bytes)", bytes.len());
-
-                let command: AgentCommand = serde_json::from_slice(&bytes)
-                    .map_err(|e| anyhow::anyhow!("Failed to deserialize command: {}", e))?;
-
-                debug!("Parsed command: {:?}", command);
-                Ok(Some(command))
-            }
-            Err(zmq::Error::EAGAIN) => {
-                // No message available (non-blocking)
-                Ok(None)
-            }
-            Err(e) => Err(anyhow::anyhow!("ZMQ receive error: {}", e)),
-        }
-    }
-}
-
-/// Commands that can be sent to the agent
-#[derive(Debug, Clone, serde::Deserialize, serde::Serialize)]
-pub enum AgentCommand {
-    /// Request immediate metric collection
-    CollectNow,
-    /// Change collection interval
-    SetInterval { seconds: u64 },
-    /// Enable/disable a collector
-    ToggleCollector { name: String, enabled: bool },
-    /// Request status/health check
-    Ping,
 }

agent/src/config/mod.rs

@@ -13,14 +13,12 @@ pub struct AgentConfig {
     pub collectors: CollectorConfig,
     pub cache: CacheConfig,
     pub notifications: NotificationConfig,
-    pub collection_interval_seconds: u64,
 }
 
 /// ZMQ communication configuration
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ZmqConfig {
     pub publisher_port: u16,
-    pub command_port: u16,
     pub bind_address: String,
     pub transmission_interval_seconds: u64,
     /// Heartbeat transmission interval in seconds for host connectivity detection

agent/src/config/validation.rs

@@ -7,21 +7,13 @@ pub fn validate_config(config: &AgentConfig) -> Result<()> {
         bail!("ZMQ publisher port cannot be 0");
     }
 
-    if config.zmq.command_port == 0 {
-        bail!("ZMQ command port cannot be 0");
-    }
-
-    if config.zmq.publisher_port == config.zmq.command_port {
-        bail!("ZMQ publisher and command ports cannot be the same");
-    }
-
     if config.zmq.bind_address.is_empty() {
         bail!("ZMQ bind address cannot be empty");
     }
 
-    // Validate collection interval
-    if config.collection_interval_seconds == 0 {
-        bail!("Collection interval cannot be 0");
+    // Validate ZMQ transmission interval
+    if config.zmq.transmission_interval_seconds == 0 {
+        bail!("ZMQ transmission interval cannot be 0");
     }
 
     // Validate CPU thresholds

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.184"
+version = "0.1.212"
 edition = "2021"
 
 [dependencies]

dashboard/src/app.rs

@@ -215,7 +215,7 @@ impl Dashboard {
 
                     // Update TUI with new metrics (only if not headless)
                     if let Some(ref mut tui_app) = self.tui_app {
-                        tui_app.update_metrics(&self.metric_store);
+                        tui_app.update_metrics(&mut self.metric_store);
                     }
                 }
                 

dashboard/src/metrics/store.rs

@@ -5,6 +5,14 @@ use tracing::{debug, info, warn};
 
 use super::MetricDataPoint;
 
+/// ZMQ communication statistics per host
+#[derive(Debug, Clone)]
+pub struct ZmqStats {
+    pub packets_received: u64,
+    pub last_packet_time: Instant,
+    pub last_packet_age_secs: f64,
+}
+
 /// Central metric storage for the dashboard
 pub struct MetricStore {
     /// Current structured data: hostname -> AgentData
@@ -13,6 +21,8 @@ pub struct MetricStore {
     historical_metrics: HashMap<String, Vec<MetricDataPoint>>,
     /// Last heartbeat timestamp per host
     last_heartbeat: HashMap<String, Instant>,
+    /// ZMQ communication statistics per host
+    zmq_stats: HashMap<String, ZmqStats>,
     /// Configuration
     max_metrics_per_host: usize,
     history_retention: Duration,
@@ -24,6 +34,7 @@ impl MetricStore {
             current_agent_data: HashMap::new(),
             historical_metrics: HashMap::new(),
             last_heartbeat: HashMap::new(),
+            zmq_stats: HashMap::new(),
             max_metrics_per_host,
             history_retention: Duration::from_secs(history_retention_hours * 3600),
         }
@@ -44,6 +55,16 @@ impl MetricStore {
         self.last_heartbeat.insert(hostname.clone(), now);
         debug!("Updated heartbeat for host {}", hostname);
 
+        // Update ZMQ stats
+        let stats = self.zmq_stats.entry(hostname.clone()).or_insert(ZmqStats {
+            packets_received: 0,
+            last_packet_time: now,
+            last_packet_age_secs: 0.0,
+        });
+        stats.packets_received += 1;
+        stats.last_packet_time = now;
+        stats.last_packet_age_secs = 0.0; // Just received
+
         // Add to history
         let host_history = self
             .historical_metrics
@@ -65,6 +86,15 @@ impl MetricStore {
         self.current_agent_data.get(hostname)
     }
 
+    /// Get ZMQ communication statistics for a host
+    pub fn get_zmq_stats(&mut self, hostname: &str) -> Option<ZmqStats> {
+        let now = Instant::now();
+        self.zmq_stats.get_mut(hostname).map(|stats| {
+            // Update packet age
+            stats.last_packet_age_secs = now.duration_since(stats.last_packet_time).as_secs_f64();
+            stats.clone()
+        })
+    }
 
     /// Get connected hosts (hosts with recent heartbeats)
     pub fn get_connected_hosts(&self, timeout: Duration) -> Vec<String> {

dashboard/src/ui/mod.rs

@@ -100,7 +100,7 @@ impl TuiApp {
     }
 
     /// Update widgets with structured data from store (only for current host)
-    pub fn update_metrics(&mut self, metric_store: &MetricStore) {
+    pub fn update_metrics(&mut self, metric_store: &mut MetricStore) {
         if let Some(hostname) = self.current_host.clone() {
             // Get structured data for this host
             if let Some(agent_data) = metric_store.get_agent_data(&hostname) {
@@ -110,6 +110,14 @@ impl TuiApp {
                 host_widgets.system_widget.update_from_agent_data(agent_data);
                 host_widgets.services_widget.update_from_agent_data(agent_data);
 
+                // Update ZMQ stats
+                if let Some(zmq_stats) = metric_store.get_zmq_stats(&hostname) {
+                    host_widgets.system_widget.update_zmq_stats(
+                        zmq_stats.packets_received,
+                        zmq_stats.last_packet_age_secs
+                    );
+                }
+
                 host_widgets.last_update = Some(Instant::now());
             }
         }

dashboard/src/ui/widgets/services.rs

@@ -28,10 +28,12 @@ pub struct ServicesWidget {
 
 #[derive(Clone)]
 struct ServiceInfo {
-    memory_mb: Option<f32>,
-    disk_gb: Option<f32>,
     metrics: Vec<(String, f32, Option<String>)>, // (label, value, unit)
     widget_status: Status,
+    service_type: String, // "nginx_site", "container", "image", or empty for parent services
+    memory_bytes: Option<u64>,
+    restart_count: Option<u32>,
+    uptime_seconds: Option<u64>,
 }
 
 impl ServicesWidget {
@@ -51,8 +53,6 @@ impl ServicesWidget {
         if metric_name.starts_with("service_") {
             if let Some(end_pos) = metric_name
                 .rfind("_status")
-                .or_else(|| metric_name.rfind("_memory_mb"))
-                .or_else(|| metric_name.rfind("_disk_gb"))
                 .or_else(|| metric_name.rfind("_latency_ms"))
             {
                 let service_part = &metric_name[8..end_pos]; // Remove "service_" prefix
@@ -75,36 +75,8 @@ impl ServicesWidget {
         None
     }
 
-    /// Format disk size with appropriate units (kB/MB/GB)
-    fn format_disk_size(size_gb: f32) -> String {
-        let size_mb = size_gb * 1024.0; // Convert GB to MB
-
-        if size_mb >= 1024.0 {
-            // Show as GB
-            format!("{:.1}GB", size_gb)
-        } else if size_mb >= 1.0 {
-            // Show as MB
-            format!("{:.0}MB", size_mb)
-        } else if size_mb >= 0.001 {
-            // Convert to kB
-            let size_kb = size_mb * 1024.0;
-            format!("{:.0}kB", size_kb)
-        } else {
-            // Show very small sizes as bytes
-            let size_bytes = size_mb * 1024.0 * 1024.0;
-            format!("{:.0}B", size_bytes)
-        }
-    }
-
     /// Format parent service line - returns text without icon for span formatting
     fn format_parent_service_line(&self, name: &str, info: &ServiceInfo) -> String {
-        let memory_str = info
-            .memory_mb
-            .map_or("0M".to_string(), |m| format!("{:.0}M", m));
-        let disk_str = info
-            .disk_gb
-            .map_or("0".to_string(), |d| Self::format_disk_size(d));
-
         // Truncate long service names to fit layout (account for icon space)
         let short_name = if name.len() > 22 {
             format!("{}...", &name[..19])
@@ -115,7 +87,7 @@ impl ServicesWidget {
         // Convert Status enum to display text
         let status_str = match info.widget_status {
             Status::Ok => "active",
-            Status::Inactive => "inactive", 
+            Status::Inactive => "inactive",
             Status::Critical => "failed",
             Status::Pending => "pending",
             Status::Warning => "warning",
@@ -123,9 +95,43 @@ impl ServicesWidget {
             Status::Offline => "offline",
         };
 
+        // Format memory
+        let memory_str = info.memory_bytes.map_or("-".to_string(), |bytes| {
+            let mb = bytes as f64 / (1024.0 * 1024.0);
+            if mb >= 1000.0 {
+                format!("{:.1}G", mb / 1024.0)
+            } else {
+                format!("{:.0}M", mb)
+            }
+        });
+
+        // Format uptime
+        let uptime_str = info.uptime_seconds.map_or("-".to_string(), |secs| {
+            let days = secs / 86400;
+            let hours = (secs % 86400) / 3600;
+            let mins = (secs % 3600) / 60;
+
+            if days > 0 {
+                format!("{}d{}h", days, hours)
+            } else if hours > 0 {
+                format!("{}h{}m", hours, mins)
+            } else {
+                format!("{}m", mins)
+            }
+        });
+
+        // Format restarts (show "!" if > 0 to indicate instability)
+        let restart_str = info.restart_count.map_or("-".to_string(), |count| {
+            if count > 0 {
+                format!("!{}", count)
+            } else {
+                "0".to_string()
+            }
+        });
+
         format!(
-            "{:<23} {:<10} {:<8} {:<8}",
-            short_name, status_str, memory_str, disk_str
+            "{:<23} {:<10} {:<8} {:<8} {:<5}",
+            short_name, status_str, memory_str, uptime_str, restart_str
         )
     }
 
@@ -169,7 +175,7 @@ impl ServicesWidget {
             // Convert Status enum to display text for sub-services
             match info.widget_status {
                 Status::Ok => "active",
-                Status::Inactive => "inactive", 
+                Status::Inactive => "inactive",
                 Status::Critical => "failed",
                 Status::Pending => "pending",
                 Status::Warning => "warning",
@@ -179,32 +185,62 @@ impl ServicesWidget {
         };
         let tree_symbol = if is_last { "└─" } else { "├─" };
 
-        vec![
-            // Indentation and tree prefix
-            ratatui::text::Span::styled(
-                format!("  {} ", tree_symbol),
-                Typography::tree(),
-            ),
-            // Status icon
-            ratatui::text::Span::styled(
-                format!("{} ", icon),
-                Style::default().fg(status_color).bg(Theme::background()),
-            ),
-            // Service name
-            ratatui::text::Span::styled(
-                format!("{:<18} ", short_name),
-                Style::default()
-                    .fg(Theme::secondary_text())
-                    .bg(Theme::background()),
-            ),
-            // Status/latency text
-            ratatui::text::Span::styled(
-                status_str,
-                Style::default()
-                    .fg(Theme::secondary_text())
-                    .bg(Theme::background()),
-            ),
-        ]
+        // Docker images use docker whale icon
+        if info.service_type == "image" {
+            vec![
+                // Indentation and tree prefix
+                ratatui::text::Span::styled(
+                    format!("  {} ", tree_symbol),
+                    Typography::tree(),
+                ),
+                // Docker icon (simple character for performance)
+                ratatui::text::Span::styled(
+                    "D ".to_string(),
+                    Style::default().fg(Theme::highlight()).bg(Theme::background()),
+                ),
+                // Service name
+                ratatui::text::Span::styled(
+                    format!("{:<18} ", short_name),
+                    Style::default()
+                        .fg(Theme::secondary_text())
+                        .bg(Theme::background()),
+                ),
+                // Status/metrics text
+                ratatui::text::Span::styled(
+                    status_str,
+                    Style::default()
+                        .fg(Theme::secondary_text())
+                        .bg(Theme::background()),
+                ),
+            ]
+        } else {
+            vec![
+                // Indentation and tree prefix
+                ratatui::text::Span::styled(
+                    format!("  {} ", tree_symbol),
+                    Typography::tree(),
+                ),
+                // Status icon
+                ratatui::text::Span::styled(
+                    format!("{} ", icon),
+                    Style::default().fg(status_color).bg(Theme::background()),
+                ),
+                // Service name
+                ratatui::text::Span::styled(
+                    format!("{:<18} ", short_name),
+                    Style::default()
+                        .fg(Theme::secondary_text())
+                        .bg(Theme::background()),
+                ),
+                // Status/latency text
+                ratatui::text::Span::styled(
+                    status_str,
+                    Style::default()
+                        .fg(Theme::secondary_text())
+                        .bg(Theme::background()),
+                ),
+            ]
+        }
     }
 
     /// Move selection up
@@ -278,13 +314,15 @@ impl Widget for ServicesWidget {
         for service in &agent_data.services {
             // Store parent service
             let parent_info = ServiceInfo {
-                memory_mb: Some(service.memory_mb),
-                disk_gb: Some(service.disk_gb),
                 metrics: Vec::new(), // Parent services don't have custom metrics
                 widget_status: service.service_status,
+                service_type: String::new(), // Parent services have no type
+                memory_bytes: service.memory_bytes,
+                restart_count: service.restart_count,
+                uptime_seconds: service.uptime_seconds,
             };
             self.parent_services.insert(service.name.clone(), parent_info);
-            
+
             // Process sub-services if any
             if !service.sub_services.is_empty() {
                 let mut sub_list = Vec::new();
@@ -293,12 +331,14 @@ impl Widget for ServicesWidget {
                     let metrics: Vec<(String, f32, Option<String>)> = sub_service.metrics.iter()
                         .map(|m| (m.label.clone(), m.value, m.unit.clone()))
                         .collect();
-                    
+
                     let sub_info = ServiceInfo {
-                        memory_mb: None, // Not used for sub-services
-                        disk_gb: None,   // Not used for sub-services
                         metrics,
                         widget_status: sub_service.service_status,
+                        service_type: sub_service.service_type.clone(),
+                        memory_bytes: None, // Sub-services don't have individual metrics yet
+                        restart_count: None,
+                        uptime_seconds: None,
                     };
                     sub_list.push((sub_service.name.clone(), sub_info));
                 }
@@ -338,22 +378,16 @@ impl ServicesWidget {
                             self.parent_services
                                 .entry(parent_service)
                                 .or_insert(ServiceInfo {
-                                    memory_mb: None,
-                                    disk_gb: None,
                                     metrics: Vec::new(),
                                     widget_status: Status::Unknown,
+                                    service_type: String::new(),
+                                    memory_bytes: None,
+                                    restart_count: None,
+                                    uptime_seconds: None,
                                 });
 
                         if metric.name.ends_with("_status") {
                             service_info.widget_status = metric.status;
-                        } else if metric.name.ends_with("_memory_mb") {
-                            if let Some(memory) = metric.value.as_f32() {
-                                service_info.memory_mb = Some(memory);
-                            }
-                        } else if metric.name.ends_with("_disk_gb") {
-                            if let Some(disk) = metric.value.as_f32() {
-                                service_info.disk_gb = Some(disk);
-                            }
                         }
                     }
                     Some(sub_name) => {
@@ -373,10 +407,12 @@ impl ServicesWidget {
                             sub_service_list.push((
                                 sub_name.clone(),
                                 ServiceInfo {
-                                    memory_mb: None,
-                                    disk_gb: None,
                                     metrics: Vec::new(),
                                     widget_status: Status::Unknown,
+                                    service_type: String::new(), // Unknown type in legacy path
+                                    memory_bytes: None,
+                                    restart_count: None,
+                                    uptime_seconds: None,
                                 },
                             ));
                             &mut sub_service_list.last_mut().unwrap().1
@@ -384,14 +420,6 @@ impl ServicesWidget {
 
                         if metric.name.ends_with("_status") {
                             sub_service_info.widget_status = metric.status;
-                        } else if metric.name.ends_with("_memory_mb") {
-                            if let Some(memory) = metric.value.as_f32() {
-                                sub_service_info.memory_mb = Some(memory);
-                            }
-                        } else if metric.name.ends_with("_disk_gb") {
-                            if let Some(disk) = metric.value.as_f32() {
-                                sub_service_info.disk_gb = Some(disk);
-                            }
                         }
                     }
                 }
@@ -450,8 +478,8 @@ impl ServicesWidget {
 
         // Header
         let header = format!(
-            "{:<25} {:<10} {:<8} {:<8}",
-            "Service:", "Status:", "RAM:", "Disk:"
+            "{:<25} {:<10} {:<8} {:<8} {:<5}",
+            "Service:", "Status:", "RAM:", "Uptime:", "↻:"
         );
         let header_para = Paragraph::new(header).style(Typography::muted());
         frame.render_widget(header_para, content_chunks[0]);

dashboard/src/ui/widgets/system.rs

@@ -15,6 +15,10 @@ pub struct SystemWidget {
     nixos_build: Option<String>,
     agent_hash: Option<String>,
 
+    // ZMQ communication stats
+    zmq_packets_received: Option<u64>,
+    zmq_last_packet_age: Option<f64>,
+
     // Network interfaces
     network_interfaces: Vec<cm_dashboard_shared::NetworkInterfaceData>,
 
@@ -22,7 +26,7 @@ pub struct SystemWidget {
     cpu_load_1min: Option<f32>,
     cpu_load_5min: Option<f32>,
     cpu_load_15min: Option<f32>,
-    cpu_frequency: Option<f32>,
+    cpu_cstates: Vec<cm_dashboard_shared::CStateInfo>,
     cpu_status: Status,
     
     // Memory metrics
@@ -92,11 +96,13 @@ impl SystemWidget {
         Self {
             nixos_build: None,
             agent_hash: None,
+            zmq_packets_received: None,
+            zmq_last_packet_age: None,
             network_interfaces: Vec::new(),
             cpu_load_1min: None,
             cpu_load_5min: None,
             cpu_load_15min: None,
-            cpu_frequency: None,
+            cpu_cstates: Vec::new(),
             cpu_status: Status::Unknown,
             memory_usage_percent: None,
             memory_used_gb: None,
@@ -131,12 +137,19 @@ impl SystemWidget {
         }
     }
 
-    /// Format CPU frequency
-    fn format_cpu_frequency(&self) -> String {
-        match self.cpu_frequency {
-            Some(freq) => format!("{:.0} MHz", freq),
-            None => "— MHz".to_string(),
+    /// Format CPU C-states (idle depth) with percentages
+    fn format_cpu_cstate(&self) -> String {
+        if self.cpu_cstates.is_empty() {
+            return "—".to_string();
         }
+
+        // Format top 3 C-states with percentages: "C10:79% C8:10% C6:8%"
+        // Agent already sends clean names (C3, C10, etc.)
+        self.cpu_cstates
+            .iter()
+            .map(|cs| format!("{}:{:.0}%", cs.name, cs.percent))
+            .collect::<Vec<_>>()
+            .join(" ")
     }
 
     /// Format memory usage
@@ -154,6 +167,12 @@ impl SystemWidget {
     pub fn _get_agent_hash(&self) -> Option<&String> {
         self.agent_hash.as_ref()
     }
+
+    /// Update ZMQ communication statistics
+    pub fn update_zmq_stats(&mut self, packets_received: u64, last_packet_age_secs: f64) {
+        self.zmq_packets_received = Some(packets_received);
+        self.zmq_last_packet_age = Some(last_packet_age_secs);
+    }
 }
 
 use super::Widget;
@@ -176,7 +195,7 @@ impl Widget for SystemWidget {
         self.cpu_load_1min = Some(cpu.load_1min);
         self.cpu_load_5min = Some(cpu.load_5min);
         self.cpu_load_15min = Some(cpu.load_15min);
-        self.cpu_frequency = Some(cpu.frequency_mhz);
+        self.cpu_cstates = cpu.cstates.clone();
         self.cpu_status = Status::Ok;
 
         // Extract memory data directly
@@ -796,6 +815,18 @@ impl SystemWidget {
             Span::styled(format!("Agent: {}", agent_version_text), Typography::secondary())
         ]));
 
+        // ZMQ communication stats
+        if let (Some(packets), Some(age)) = (self.zmq_packets_received, self.zmq_last_packet_age) {
+            let age_text = if age < 1.0 {
+                format!("{:.0}ms ago", age * 1000.0)
+            } else {
+                format!("{:.1}s ago", age)
+            };
+            lines.push(Line::from(vec![
+                Span::styled(format!("ZMQ: {} pkts, last {}", packets, age_text), Typography::secondary())
+            ]));
+        }
+
         // CPU section
         lines.push(Line::from(vec![
             Span::styled("CPU:", Typography::widget_title())
@@ -808,10 +839,10 @@ impl SystemWidget {
         );
         lines.push(Line::from(cpu_spans));
 
-        let freq_text = self.format_cpu_frequency();
+        let cstate_text = self.format_cpu_cstate();
         lines.push(Line::from(vec![
             Span::styled("  └─ ", Typography::tree()),
-            Span::styled(format!("Freq: {}", freq_text), Typography::secondary())
+            Span::styled(format!("C-state: {}", cstate_text), Typography::secondary())
         ]));
 
         // RAM section

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.184"
+version = "0.1.212"
 edition = "2021"
 
 [dependencies]

shared/src/agent_data.rs

@@ -40,13 +40,20 @@ pub struct NetworkInterfaceData {
     pub vlan_id: Option<u16>,
 }
 
+/// CPU C-state usage information
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CStateInfo {
+    pub name: String,
+    pub percent: f32,
+}
+
 /// CPU monitoring data
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct CpuData {
     pub load_1min: f32,
     pub load_5min: f32,
     pub load_15min: f32,
-    pub frequency_mhz: f32,
+    pub cstates: Vec<CStateInfo>, // C-state usage percentages (C1, C6, C10, etc.) - indicates CPU idle depth distribution
     pub temperature_celsius: Option<f32>,
     pub load_status: Status,
     pub temperature_status: Status,
@@ -136,11 +143,15 @@ pub struct PoolDriveData {
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ServiceData {
     pub name: String,
-    pub memory_mb: f32,
-    pub disk_gb: f32,
     pub user_stopped: bool,
     pub service_status: Status,
     pub sub_services: Vec<SubServiceData>,
+    /// Memory usage in bytes (from MemoryCurrent)
+    pub memory_bytes: Option<u64>,
+    /// Number of service restarts (from NRestarts)
+    pub restart_count: Option<u32>,
+    /// Uptime in seconds (calculated from ExecMainStartTimestamp)
+    pub uptime_seconds: Option<u64>,
 }
 
 /// Sub-service data (nginx sites, docker containers, etc.)
@@ -149,6 +160,9 @@ pub struct SubServiceData {
     pub name: String,
     pub service_status: Status,
     pub metrics: Vec<SubServiceMetric>,
+    /// Type of sub-service: "nginx_site", "container", "image"
+    #[serde(default)]
+    pub service_type: String,
 }
 
 /// Individual metric for a sub-service
@@ -197,7 +211,7 @@ impl AgentData {
                     load_1min: 0.0,
                     load_5min: 0.0,
                     load_15min: 0.0,
-                    frequency_mhz: 0.0,
+                    cstates: Vec::new(),
                     temperature_celsius: None,
                     load_status: Status::Unknown,
                     temperature_status: Status::Unknown,