atrace: add clock rate and bus utilization
Change-Id: I4e1764b51225436fc2b3d61454ee822f511a1a7d
diff --git a/atrace/atrace.c b/atrace/atrace.c
index d81cb5c..381a4ed 100644
--- a/atrace/atrace.c
+++ b/atrace/atrace.c
@@ -30,7 +30,8 @@
/* Command line options */
static int g_traceDurationSeconds = 5;
static bool g_traceSchedSwitch = false;
-static bool g_traceCpuFrequency = false;
+static bool g_traceFrequency = false;
+static bool g_traceBusUtilization = false;
static bool g_traceCpuIdle = false;
static bool g_traceDisk = false;
static bool g_traceGovernorLoad = false;
@@ -58,9 +59,15 @@
static const char* k_schedWakeupEnablePath =
"/sys/kernel/debug/tracing/events/sched/sched_wakeup/enable";
+static const char* k_memoryBusEnablePath =
+ "/sys/kernel/debug/tracing/events/memory_bus/enable";
+
static const char* k_cpuFreqEnablePath =
"/sys/kernel/debug/tracing/events/power/cpu_frequency/enable";
+static const char *k_clockSetRateEnablePath =
+ "/sys/kernel/debug/tracing/events/power/clock_set_rate/enable";
+
static const char* k_cpuIdleEnablePath =
"/sys/kernel/debug/tracing/events/power/cpu_idle/enable";
@@ -141,10 +148,23 @@
return ok;
}
-// Enable or disable tracing of the CPU clock frequency.
-static bool setCpuFrequencyTracingEnable(bool enable)
+// Enable or disable tracing of the Bus utilization.
+static bool setBusUtilizationTracingEnable(bool enable)
{
- return setKernelOptionEnable(k_cpuFreqEnablePath, enable);
+ bool ok = false;
+ // these can be platform specific so make sure that at least
+ // one succeeds.
+ ok |= setKernelOptionEnable(k_memoryBusEnablePath, enable);
+ return ok;
+}
+
+// Enable or disable tracing of the CPU clock frequency.
+static bool setFrequencyTracingEnable(bool enable)
+{
+ bool ok = true;
+ ok &= setKernelOptionEnable(k_cpuFreqEnablePath, enable);
+ ok &= setKernelOptionEnable(k_clockSetRateEnablePath, enable);
+ return ok;
}
// Enable or disable tracing of CPU idle events.
@@ -225,7 +245,8 @@
// Set up the tracing options that don't require root.
ok &= setTraceOverwriteEnable(g_traceOverwrite);
ok &= setSchedSwitchTracingEnable(g_traceSchedSwitch);
- ok &= setCpuFrequencyTracingEnable(g_traceCpuFrequency);
+ ok &= setBusUtilizationTracingEnable(g_traceBusUtilization);
+ ok &= setFrequencyTracingEnable(g_traceFrequency);
ok &= setCpuIdleTracingEnable(g_traceCpuIdle);
if (fileExists(k_governorLoadEnablePath) || g_traceGovernorLoad) {
ok &= setGovernorLoadTracingEnable(g_traceGovernorLoad);
@@ -260,7 +281,8 @@
// Set the options back to their defaults.
setTraceOverwriteEnable(true);
setSchedSwitchTracingEnable(false);
- setCpuFrequencyTracingEnable(false);
+ setBusUtilizationTracingEnable(false);
+ setFrequencyTracingEnable(false);
if (fileExists(k_governorLoadEnablePath)) {
setGovernorLoadTracingEnable(false);
}
@@ -380,10 +402,11 @@
" -b N use a trace buffer size of N KB\n"
" -c trace into a circular buffer\n"
" -d trace disk I/O\n"
- " -f trace CPU frequency changes\n"
+ " -f trace clock frequency changes\n"
" -l trace CPU frequency governor load\n"
" -s trace the kernel scheduler switches\n"
" -t N trace for N seconds [defualt 5]\n"
+ " -u trace bus utilization\n"
" -w trace the kernel workqueue\n"
" -z compress the trace dump\n");
}
@@ -415,7 +438,7 @@
for (;;) {
int ret;
- ret = getopt(argc, argv, "b:cidflst:wz");
+ ret = getopt(argc, argv, "b:cidflst:uwz");
if (ret < 0) {
break;
@@ -447,7 +470,7 @@
break;
case 'f':
- g_traceCpuFrequency = true;
+ g_traceFrequency = true;
break;
case 's':
@@ -458,6 +481,14 @@
g_traceDurationSeconds = atoi(optarg);
break;
+ case 'u':
+ if (!isRoot) {
+ fprintf(stderr, "error: tracing bus utilization requires root privileges\n");
+ exit(1);
+ }
+ g_traceBusUtilization = true;
+ break;
+
case 'w':
if (!isRoot) {
fprintf(stderr, "error: tracing kernel work queues requires root privileges\n");
