diff --git a/audit/internal/platform/platform_stress.go b/audit/internal/platform/platform_stress.go
index 239cfad..9068712 100644
--- a/audit/internal/platform/platform_stress.go
+++ b/audit/internal/platform/platform_stress.go
@@ -110,7 +110,7 @@ func (s *System) RunPlatformStress(
 			wg.Add(1)
 			go func() {
 				defer wg.Done()
-				gpuCmd := buildGPUStressCmd(loadCtx, vendor)
+				gpuCmd := buildGPUStressCmd(loadCtx, vendor, cycle.LoadSec)
 				if gpuCmd == nil {
 					return
 				}
@@ -409,28 +409,28 @@ func buildCPUStressCmd(ctx context.Context) (*exec.Cmd, error) {
 
 // buildGPUStressCmd creates a GPU stress command appropriate for the detected vendor.
 // Returns nil if no GPU stress tool is available (CPU-only cycling still useful).
-func buildGPUStressCmd(ctx context.Context, vendor string) *exec.Cmd {
+func buildGPUStressCmd(ctx context.Context, vendor string, durSec int) *exec.Cmd {
 	switch strings.ToLower(vendor) {
 	case "amd":
-		return buildAMDGPUStressCmd(ctx)
+		return buildAMDGPUStressCmd(ctx, durSec)
 	case "nvidia":
-		return buildNvidiaGPUStressCmd(ctx)
+		return buildNvidiaGPUStressCmd(ctx, durSec)
 	}
 	return nil
 }
 
-func buildAMDGPUStressCmd(ctx context.Context) *exec.Cmd {
+func buildAMDGPUStressCmd(ctx context.Context, durSec int) *exec.Cmd {
 	rvsArgs, err := resolveRVSCommand()
 	if err != nil {
 		return nil
 	}
 	rvsPath := rvsArgs[0]
-	cfg := `actions:
+	cfg := fmt.Sprintf(`actions:
 - name: gst_platform
   device: all
   module: gst
   parallel: true
-  duration: 86400000
+  duration: %d`, durSec*1000) + `
   copy_matrix: false
   target_stress: 90
   matrix_size_a: 8640
@@ -453,7 +453,7 @@ func buildAMDGPUStressCmd(ctx context.Context) *exec.Cmd {
 	return cmd
 }
 
-func buildNvidiaGPUStressCmd(ctx context.Context) *exec.Cmd {
+func buildNvidiaGPUStressCmd(ctx context.Context, durSec int) *exec.Cmd {
 	path, err := satLookPath("bee-gpu-burn")
 	if err != nil {
 		path, err = satLookPath("bee-gpu-stress")
@@ -461,10 +461,10 @@ func buildNvidiaGPUStressCmd(ctx context.Context) *exec.Cmd {
 	if err != nil {
 		return nil
 	}
-	cmd := exec.CommandContext(ctx, path, "--seconds", "86400")
-	// bee-gpu-burn is a shell script that spawns bee-gpu-burn-worker children.
-	// Put the whole tree in its own process group so context cancellation kills
-	// all workers, not just the shell parent.
+	// Pass exact duration so bee-gpu-burn exits on its own when the cycle ends.
+	// Process group kill via Setpgid+Cancel is kept as a safety net for cases
+	// where the context is cancelled early (user stop, parent timeout).
+	cmd := exec.CommandContext(ctx, path, "--seconds", strconv.Itoa(durSec))
 	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
 	cmd.Cancel = func() error {
 		if cmd.Process != nil {