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atrace: add clock rate and bus utilization 

Change-Id: I4e1764b51225436fc2b3d61454ee822f511a1a7d
This commit is contained in:
Erik Gilling 2012-09-20 17:55:10 -07:00
parent 4b23eefd72
commit 99be77cf00
1 changed files with 40 additions and 9 deletions
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49
cmds/atrace/atrace.c
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@ -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_schedSwitchEnablePath =
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 @@ static bool setSchedSwitchTracingEnable(bool enable)
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 @@ static bool startTrace(bool isRoot)
// 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 @@ static void stopTrace(bool isRoot)
// 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 @@ static void showHelp(const char *cmd)
" -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 @@ int main(int argc, char **argv)
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 @@ int main(int argc, char **argv)
break;
case 'f':
g_traceCpuFrequency = true;
g_traceFrequency = true;
break;
case 's':
@ -458,6 +481,14 @@ int main(int argc, char **argv)
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");