atrace: add sync trace support (9ba4baf1) · Commits · e / os / android_frameworks_native

cmds/atrace/atrace.c

+26 −1

Original line number	Diff line number	Diff line
		@@ -35,6 +35,7 @@ static bool g_traceBusUtilization = false;
		static bool g_traceCpuIdle = false;
		static bool g_traceDisk = false;
		static bool g_traceGovernorLoad = false;
		static bool g_traceSync = false;
		static bool g_traceWorkqueue = false;
		static bool g_traceOverwrite = false;
		static int g_traceBufferSizeKB = 2048;
		@@ -76,6 +77,9 @@ static const char* k_cpuIdleEnablePath =
		static const char* k_governorLoadEnablePath =
		"/sys/kernel/debug/tracing/events/cpufreq_interactive/enable";

		static const char* k_syncEnablePath =
		"/sys/kernel/debug/tracing/events/sync/enable";

		static const char* k_workqueueEnablePath =
		"/sys/kernel/debug/tracing/events/workqueue/enable";

		@@ -196,6 +200,16 @@ static bool setGovernorLoadTracingEnable(bool enable)
		return ok;
		}

		// Enable or disable tracing of sync timelines and waits.
		static bool setSyncTracingEnabled(bool enable)
		{
		bool ok = true;
		if (fileExists(k_syncEnablePath) \|\| enable) {
		ok &= setKernelOptionEnable(k_syncEnablePath, enable);
		}
		return ok;
		}

		// Enable or disable tracing of the kernel workqueues.
		static bool setWorkqueueTracingEnabled(bool enable)
		{
		@@ -267,6 +281,7 @@ static bool startTrace(bool isRoot)
		// root.
		if (isRoot) {
		ok &= setBusUtilizationTracingEnable(g_traceBusUtilization);
		ok &= setSyncTracingEnabled(g_traceSync);
		ok &= setWorkqueueTracingEnabled(g_traceWorkqueue);
		ok &= setDiskTracingEnabled(g_traceDisk);
		}
		@@ -296,6 +311,7 @@ static void stopTrace(bool isRoot)

		if (isRoot) {
		setBusUtilizationTracingEnable(false);
		setSyncTracingEnabled(false);
		setWorkqueueTracingEnabled(false);
		setDiskTracingEnabled(false);
		}
		@@ -415,6 +431,7 @@ static void showHelp(const char *cmd)
		" -t N trace for N seconds [defualt 5]\n"
		" -u trace bus utilization\n"
		" -w trace the kernel workqueue\n"
		" -y trace sync timelines and waits\n"
		" -z compress the trace dump\n");
		}

		@@ -447,7 +464,7 @@ int main(int argc, char **argv)
		for (;;) {
		int ret;

		ret = getopt(argc, argv, "b:cidflst:uwznS:");
		ret = getopt(argc, argv, "b:cidflst:uwyznS:");

		if (ret < 0) {
		break;
		@@ -514,6 +531,14 @@ int main(int argc, char **argv)
		g_traceWorkqueue = true;
		break;

		case 'y':
		if (!isRoot) {
		fprintf(stderr, "error: tracing sync requires root privileges\n");
		exit(1);
		}
		g_traceSync = true;
		break;

		case 'z':
		g_compress = true;
		break;