Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3169533f authored by Jamie Gennis's avatar Jamie Gennis
Browse files

atrace: add support for tracing CPU idle events 

This change adds the -i command line flag to atrace to enable tracing CPU idle
kernel events.

Change-Id: I4a2c8619224c0f50c7fd7c61c7b24fa2211f656c
parent 7b5170b2

cmds/atrace/atrace.c

+16 −1
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
static int g_traceDurationSeconds = 5;

static bool g_traceSchedSwitch = false;

static bool g_traceCpuFrequency = false;

static bool g_traceCpuIdle = false;

static bool g_traceGovernorLoad = false;

static bool g_traceWorkqueue = false;

static bool g_traceOverwrite = false;
@@ -54,6 +55,9 @@ static const char* k_schedSwitchEnablePath = 
static const char* k_cpuFreqEnablePath =

    "/sys/kernel/debug/tracing/events/power/cpu_frequency/enable";



static const char* k_cpuIdleEnablePath =

    "/sys/kernel/debug/tracing/events/power/cpu_idle/enable";



static const char* k_governorLoadEnablePath =

    "/sys/kernel/debug/tracing/events/cpufreq_interactive/enable";
@@ -117,6 +121,12 @@ static bool setCpuFrequencyTracingEnable(bool enable) 
    return setKernelOptionEnable(k_cpuFreqEnablePath, enable);

}



// Enable or disable tracing of CPU idle events.

static bool setCpuIdleTracingEnable(bool enable)

{

    return setKernelOptionEnable(k_cpuIdleEnablePath, enable);

}



// Enable or disable tracing of the interactive CPU frequency governor's idea of

// the CPU load.

static bool setGovernorLoadTracingEnable(bool enable)
@@ -184,6 +194,7 @@ static bool startTrace() 
    ok &= setTraceOverwriteEnable(g_traceOverwrite);

    ok &= setSchedSwitchTracingEnable(g_traceSchedSwitch);

    ok &= setCpuFrequencyTracingEnable(g_traceCpuFrequency);

    ok &= setCpuIdleTracingEnable(g_traceCpuIdle);

    if (fileExists(k_governorLoadEnablePath) || g_traceGovernorLoad) {

        ok &= setGovernorLoadTracingEnable(g_traceGovernorLoad);

    }
@@ -363,7 +374,7 @@ int main(int argc, char **argv) 
    for (;;) {

        int ret;



        ret = getopt(argc, argv, "b:cflst:wz");

        ret = getopt(argc, argv, "b:ciflst:wz");



        if (ret < 0) {

            break;
@@ -378,6 +389,10 @@ int main(int argc, char **argv) 
                g_traceOverwrite = true;

            break;



            case 'i':

                g_traceCpuIdle = true;

            break;



            case 'l':

                g_traceGovernorLoad = true;

            break;