src/engine/mod.rs

@@ -38,7 +38,7 @@ impl OptimizerEngine {
         Self { window_size }
     }
 
-    /// Applies a simple moving average (SMA) filter to a stream of values.
+    /// Applies a simple moving average (SMA) filter with outlier rejection.
     pub fn smooth(&self, data: &[f32]) -> Vec<f32> {
         if data.is_empty() { return vec![]; }
         let mut smoothed = Vec::with_capacity(data.len());
@@ -46,8 +46,19 @@ impl OptimizerEngine {
         for i in 0..data.len() {
             let start = if i < self.window_size { 0 } else { i - self.window_size + 1 };
             let end = i + 1;
-            let sum: f32 = data[start..end].iter().sum();
-            smoothed.push(sum / (end - start) as f32);
+            
+            // Outlier rejection: only average values within a reasonable range
+            let window = &data[start..end];
+            let avg: f32 = window.iter().sum::<f32>() / window.len() as f32;
+            let filtered: Vec<f32> = window.iter()
+                .filter(|&&v| (v - avg).abs() < 20.0) // Reject spikes > 20 units
+                .cloned().collect();
+            
+            if filtered.is_empty() {
+                smoothed.push(avg);
+            } else {
+                smoothed.push(filtered.iter().sum::<f32>() / filtered.len() as f32);
+            }
         }
         smoothed
     }
@@ -55,11 +66,9 @@ impl OptimizerEngine {
     /// Calculates Thermal Resistance: R_theta = (T_core - T_ambient) / P_package
     pub fn calculate_thermal_resistance(&self, profile: &ThermalProfile) -> f32 {
         profile.points.iter()
+            .filter(|p| p.power_w > 1.0 && p.temp_c > 30.0) // Filter invalid data
             .max_by(|a, b| a.power_w.partial_cmp(&b.power_w).unwrap_or(std::cmp::Ordering::Equal))
-            .map(|p| {
-                if p.power_w < 1.0 { 0.0 }
-                else { (p.temp_c - profile.ambient_temp) / p.power_w }
-            })
+            .map(|p| (p.temp_c - profile.ambient_temp) / p.power_w)
             .unwrap_or(0.0)
     }
 
@@ -73,11 +82,16 @@ impl OptimizerEngine {
     /// Finds the "Silicon Knee" - the point where performance per watt (efficiency) 
     /// starts to diminish significantly and thermal density spikes.
     pub fn find_silicon_knee(&self, profile: &ThermalProfile) -> f32 {
-        if profile.points.len() < 3 {
+        let valid_points: Vec<_> = profile.points.iter()
+            .filter(|p| p.power_w > 5.0 && p.temp_c > 40.0) // Filter idle/noise
+            .cloned()
+            .collect();
+
+        if valid_points.len() < 3 {
             return profile.points.last().map(|p| p.power_w).unwrap_or(15.0);
         }
 
-        let mut points = profile.points.clone();
+        let mut points = valid_points;
         points.sort_by(|a, b| a.power_w.partial_cmp(&b.power_w).unwrap_or(std::cmp::Ordering::Equal));
 
         let mut best_pl = points[0].power_w;

src/main.rs

@@ -229,7 +229,7 @@ fn main() -> Result<()> {
 
         while let Ok(new_state) = telemetry_rx.try_recv() {
             if let Some(log) = &new_state.log_event {
-                ui_state.logs.push(log.clone());
+                ui_state.add_log(log.clone());
                 debug!("Backend Log: {}", log);
             } else {
                 ui_state.update(&new_state);

src/orchestrator/mod.rs

@@ -7,7 +7,6 @@ use sysinfo::System;
 use std::sync::Arc;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::Mutex;
-use std::path::PathBuf;
 
 use crate::sal::traits::{PlatformSal, AuditStep, SafetyStatus};
 use crate::sal::heuristic::discovery::SystemFactSheet;
@@ -80,6 +79,21 @@ impl BenchmarkOrchestrator {
         // Start Watchdog Monitor
         let _watchdog_handle = self.spawn_watchdog_monitor();
 
+        // Use a closure to ensure cleanup always runs
+        let result = self.execute_benchmark();
+
+        // --- MANDATORY CLEANUP ---
+        self.log("Benchmark sequence finished. Restoring hardware defaults...")?;
+        let _ = self.workload.stop();
+        if let Err(e) = self.sal.restore() {
+            anyhow::bail!("CRITICAL: Failed to restore hardware state: {}", e);
+        }
+        self.log("✓ Hardware state restored.")?;
+
+        result
+    }
+
+    fn execute_benchmark(&mut self) -> Result<OptimizationResult> {
         // Phase 1: Audit & Baseline
         self.phase = BenchmarkPhase::Auditing;
         for step in self.sal.audit() {
@@ -208,9 +222,6 @@ impl BenchmarkOrchestrator {
             res.config_paths.insert("i8kmon".to_string(), i8k_path.clone());
         }
         
-        self.sal.restore()?;
-        self.log("✓ Environment restored.")?;
-
         Ok(res)
     }
 
@@ -228,9 +239,7 @@ impl BenchmarkOrchestrator {
                         abort.store(true, Ordering::SeqCst);
                         break;
                     }
-                    Ok(SafetyStatus::Warning(_msg)) | Ok(SafetyStatus::Critical(_msg)) => {
-                        // Send warning log to UI
-                    }
+                    Ok(SafetyStatus::Warning(_msg)) | Ok(SafetyStatus::Critical(_msg)) => {}
                     Ok(SafetyStatus::Nominal) => {}
                     Err(e) => {
                         *reason_store.lock().unwrap() = Some(format!("Watchdog Sensor Failure: {}", e));

src/sal/dell_xps_9380.rs

@@ -108,7 +108,6 @@ impl PreflightAuditor for DellXps9380Sal {
             }
         });
 
-        // Tool availability check
         let tool_check = self.fact_sheet.paths.tools.contains_key("dell_fan_ctrl");
         steps.push(AuditStep {
             description: "Dell Fan Control Tool".to_string(),
@@ -125,6 +124,7 @@ impl EnvironmentGuard for DellXps9380Sal {
         let mut suppressed = self.suppressed_services.lock().unwrap();
         for s in services {
             if Command::new("systemctl").args(["is-active", "--quiet", s]).status()?.success() {
+                debug!("Suppressing service: {}", s);
                 Command::new("systemctl").args(["stop", s]).status()?;
                 suppressed.push(s.to_string());
             }

src/ui/dashboard.rs

@@ -7,20 +7,29 @@ use ratatui::{
     Frame,
     prelude::Stylize,
 };
+use std::collections::VecDeque;
 use crate::mediator::TelemetryState;
 use crate::ui::theme::*;
 
 /// DashboardState maintains UI-specific state that isn't part of the core telemetry,
 /// such as the accumulated diagnostic logs.
 pub struct DashboardState {
-    pub logs: Vec<String>,
+    pub logs: VecDeque<String>,
 }
 
 impl DashboardState {
     pub fn new() -> Self {
-        Self {
-            logs: vec!["ember-tune Initialized.".to_string()],
+        let mut logs = VecDeque::with_capacity(100);
+        logs.push_back("ember-tune Initialized.".to_string());
+        Self { logs }
+    }
+
+    /// Adds a log message and ensures the buffer does not exceed capacity.
+    pub fn add_log(&mut self, msg: String) {
+        if self.logs.len() >= 100 {
+            self.logs.pop_front();
         }
+        self.logs.push_back(msg);
     }
 
     /// Updates the UI state based on new telemetry.