perf_timed_pmu.c 文件参考

浏览源代码.

函数
STATIC BOOL	OsPerfTimedPeriodValid (UINT32 period)
STATIC UINT32	OsPerfTimedStart (VOID)
STATIC UINT32	OsPerfTimedConfig (VOID)
STATIC UINT32	OsPerfTimedStop (VOID)
STATIC VOID	OsPerfTimedHandle (VOID)
STATIC enum hrtimer_restart	OsPerfHrtimer (struct hrtimer *hrtimer)
STATIC CHAR *	OsPerfGetEventName (Event *event)
UINT32	OsTimedPmuInit (VOID)

变量
STATIC SwPmu	g_perfTimed

函数说明

OsPerfGetEventName()

STATIC CHAR * OsPerfGetEventName

(

Event *

event

)

在文件 perf_timed_pmu.c 第 141 行定义.

{
    if (event->eventId == PERF_COUNT_CPU_CLOCK) {
        return "timed";
    } else {
        return "unknown";
    }
}

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OsPerfHrtimer()

STATIC enum hrtimer_restart OsPerfHrtimer

(

struct hrtimer *

hrtimer

)

在文件 perf_timed_pmu.c 第 135 行定义.

{
    SMP_CALL_PERF_FUNC(OsPerfTimedHandle); /* send to all cpu to collect data */
    return HRTIMER_RESTART;
}

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OsPerfTimedConfig()

STATIC UINT32 OsPerfTimedConfig

(

VOID

)

在文件 perf_timed_pmu.c 第 74 行定义.

{
    UINT32 i;
    PerfEvent *events = &g_perfTimed.pmu.events;
    UINT32 eventNum = events->nr;
 
    for (i = 0; i < eventNum; i++) {
        Event *event = &(events->per[i]);
        UINT32 period = event->period;
        if (event->eventId == PERF_COUNT_CPU_CLOCK) {
            if (!OsPerfTimedPeriodValid(period)) {
                period = TIMER_PERIOD_LOWER_BOUND_US;
                PRINT_ERR("config period invalid, should be >= 100, use default period:%u us\n", period);
            }
 
            g_perfTimed.cfgTime = (union ktime) {
                .tv.sec  = period / US_PER_SECOND,
                .tv.usec = period % US_PER_SECOND
            };
            PRINT_INFO("hrtimer config period - sec:%d, usec:%d\n", g_perfTimed.cfgTime.tv.sec,
                g_perfTimed.cfgTime.tv.usec);
            return LOS_OK;
        }
    }
    return LOS_NOK;
}

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OsPerfTimedHandle()

STATIC VOID OsPerfTimedHandle

(

VOID

)

在文件 perf_timed_pmu.c 第 117 行定义.

{
    UINT32 index;
    PerfRegs regs;
 
    PerfEvent *events = &g_perfTimed.pmu.events;
    UINT32 eventNum = events->nr;
 
    (VOID)memset_s(&regs, sizeof(PerfRegs), 0, sizeof(PerfRegs));
    OsPerfFetchIrqRegs(&regs);
 
    for (index = 0; index < eventNum; index++) {
        Event *event = &(events->per[index]);
        OsPerfUpdateEventCount(event, 1); /* eventCount += 1 every once */
        OsPerfHandleOverFlow(event, &regs);
    }
}

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OsPerfTimedPeriodValid()

STATIC BOOL OsPerfTimedPeriodValid

(

UINT32

period

)

在文件 perf_timed_pmu.c 第 39 行定义.

{
    return period >= TIMER_PERIOD_LOWER_BOUND_US;
}

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OsPerfTimedStart()

STATIC UINT32 OsPerfTimedStart

(

VOID

)

在文件 perf_timed_pmu.c 第 44 行定义.

{
    UINT32 i;
    UINT32 cpuid = ArchCurrCpuid();
    PerfEvent *events = &g_perfTimed.pmu.events;
    UINT32 eventNum = events->nr;
 
    for (i = 0; i < eventNum; i++) {
        Event *event = &(events->per[i]);
        event->count[cpuid] = 0;
    }
 
    if (cpuid != 0) { /* only need start on one core */
        return LOS_OK;
    }
 
    if (hrtimer_start(&g_perfTimed.hrtimer, g_perfTimed.time, HRTIMER_MODE_REL) != 0) {
        PRINT_ERR("Hrtimer start failed\n");
        return LOS_NOK;
    }
 
    if (hrtimer_forward(&g_perfTimed.hrtimer, g_perfTimed.cfgTime) == 0) {
        PRINT_ERR("Hrtimer forward failed\n");
        return LOS_NOK;
    }
 
    g_perfTimed.time = g_perfTimed.cfgTime;
    return LOS_OK;
}

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OsPerfTimedStop()

STATIC UINT32 OsPerfTimedStop

(

VOID

)

在文件 perf_timed_pmu.c 第 101 行定义.

{
    UINT32 ret;
 
    if (ArchCurrCpuid() != 0) { /* only need stop on one core */
        return LOS_OK;
    }
 
    ret = hrtimer_cancel(&g_perfTimed.hrtimer);
    if (ret != 1) {
        PRINT_ERR("Hrtimer stop failed!, 0x%x\n", ret);
        return LOS_NOK;
    }
    return LOS_OK;
}

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OsTimedPmuInit()

UINT32 OsTimedPmuInit

(

VOID

)

在文件 perf_timed_pmu.c 第 150 行定义.

{
    UINT32 ret;
 
    g_perfTimed.time = (union ktime) {
        .tv.sec = 0,
        .tv.usec = HRTIMER_DEFAULT_PERIOD_US,
    };
 
    hrtimer_init(&g_perfTimed.hrtimer, 1, HRTIMER_MODE_REL);
 
    ret = hrtimer_create(&g_perfTimed.hrtimer, g_perfTimed.time, OsPerfHrtimer);
    if (ret != LOS_OK) {
        return ret;
    }
 
    g_perfTimed.pmu = (Pmu) {
        .type    = PERF_EVENT_TYPE_TIMED,
        .config  = OsPerfTimedConfig,
        .start   = OsPerfTimedStart,
        .stop    = OsPerfTimedStop,
        .getName = OsPerfGetEventName,
    };
 
    (VOID)memset_s(&g_perfTimed.pmu.events, sizeof(PerfEvent), 0, sizeof(PerfEvent));
    ret = OsPerfPmuRegister(&g_perfTimed.pmu);
    return ret;
}

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变量说明

g_perfTimed

STATIC SwPmu g_perfTimed

在文件 perf_timed_pmu.c 第 37 行定义.