los_perf.c 文件参考

浏览源代码.

函数
LITE_OS_SEC_BSS	SPIN_LOCK_INIT (g_perfSpin)
STATIC INLINE UINT64	OsPerfGetCurrTime (VOID)
STATIC UINT32	OsPmuInit (VOID)
STATIC UINT32	OsPerfConfig (PerfEventConfig *eventsCfg)
STATIC VOID	OsPerfPrintCount (VOID)
STATIC INLINE VOID	OsPerfPrintTs (VOID)
STATIC VOID	OsPerfStart (VOID)
STATIC VOID	OsPerfStop (VOID)
STATIC INLINE UINT32	OsPerfSaveIpInfo (CHAR *buf, IpInfo *info)
STATIC UINT32	OsPerfBackTrace (PerfBackTrace *callChain, UINT32 maxDepth, PerfRegs *regs)
STATIC INLINE UINT32	OsPerfSaveBackTrace (CHAR *buf, PerfBackTrace *callChain, UINT32 count)
STATIC UINT32	OsPerfCollectData (Event *event, PerfSampleData *data, PerfRegs *regs)
STATIC INLINE BOOL	OsFilterId (UINT32 id, UINT32 *ids, UINT8 idsNr)
STATIC INLINE BOOL	OsPerfFilter (UINT32 taskId, UINT32 processId)
STATIC INLINE UINT32	OsPerfParamValid (VOID)
STATIC UINT32	OsPerfHdrInit (UINT32 id)
VOID	OsPerfUpdateEventCount (Event *event, UINT32 value)
VOID	OsPerfHandleOverFlow (Event *event, PerfRegs *regs)
STATIC UINT32	OsPerfInit (VOID)
STATIC VOID	PerfInfoDump (VOID)
STATIC INLINE VOID	OsPerfSetFilterIds (UINT32 *dstIds, UINT8 *dstIdsNr, UINT32 *ids, UINT32 idsNr)
UINT32	LOS_PerfConfig (PerfConfigAttr *attr)
	Config perf parameters. 更多...
VOID	LOS_PerfStart (UINT32 sectionId)
	Start perf sampling. 更多...
VOID	LOS_PerfStop (VOID)
	Stop perf sampling. 更多...
UINT32	LOS_PerfDataRead (CHAR *dest, UINT32 size)
	Read data from perf sample data buffer. 更多...
VOID	LOS_PerfNotifyHookReg (const PERF_BUF_NOTIFY_HOOK func)
	Register perf sample data buffer water mark hook function. 更多...
VOID	LOS_PerfFlushHookReg (const PERF_BUF_FLUSH_HOOK func)
	Register perf sample data buffer flush hook function. 更多...
VOID	OsPerfSetIrqRegs (UINTPTR pc, UINTPTR fp)
	LOS_MODULE_INIT (OsPerfInit, LOS_INIT_LEVEL_KMOD_EXTENDED)

变量
STATIC Pmu *	g_pmu = NULL
STATIC PerfCB	g_perfCb = {0}

函数说明

LOS_MODULE_INIT()

LOS_MODULE_INIT	(	OsPerfInit	,
		LOS_INIT_LEVEL_KMOD_EXTENDED
	)

OsFilterId()

STATIC INLINE BOOL OsFilterId	(	UINT32	id,
		UINT32 *	ids,
		UINT8	idsNr
	)

在文件 los_perf.c 第 292 行定义.

{
    UINT32 i;
    if (!idsNr) {
        return TRUE;
    }
 
    for (i = 0; i < idsNr; i++) {
        if (ids[i] == id) {
            return TRUE;
        }
    }
    return FALSE;
}

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OsPerfBackTrace()

STATIC UINT32 OsPerfBackTrace	(	PerfBackTrace *	callChain,
		UINT32	maxDepth,
		PerfRegs *	regs
	)

在文件 los_perf.c 第 217 行定义.

{
    UINT32 count = BackTraceGet(regs->fp, (IpInfo *)(callChain->ip), maxDepth);
    PRINT_DEBUG("backtrace depth = %u, fp = 0x%x\n", count, regs->fp);
    return count;
}

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OsPerfCollectData()

STATIC UINT32 OsPerfCollectData	(	Event *	event,
		PerfSampleData *	data,
		PerfRegs *	regs
	)

在文件 los_perf.c 第 235 行定义.

{
    UINT32 size = 0;
    UINT32 depth;
    IpInfo pc = {0};
    PerfBackTrace callChain = {0};
    UINT32 sampleType = g_perfCb.sampleType;
    CHAR *p = (CHAR *)data;
 
    if (sampleType & PERF_RECORD_CPU) {
        *(UINT32 *)(p + size) = ArchCurrCpuid();
        size += sizeof(data->cpuid);
    }
 
    if (sampleType & PERF_RECORD_TID) {
        *(UINT32 *)(p + size) = LOS_CurTaskIDGet();
        size += sizeof(data->taskId);
    }
 
    if (sampleType & PERF_RECORD_PID) {
        *(UINT32 *)(p + size) = LOS_GetCurrProcessID();
        size += sizeof(data->processId);
    }
 
    if (sampleType & PERF_RECORD_TYPE) {
        *(UINT32 *)(p + size) = event->eventId;
        size += sizeof(data->eventId);
    }
 
    if (sampleType & PERF_RECORD_PERIOD) {
        *(UINT32 *)(p + size) = event->period;
        size += sizeof(data->period);
    }
 
    if (sampleType & PERF_RECORD_TIMESTAMP) {
        *(UINT64 *)(p + size) = OsPerfGetCurrTime();
        size += sizeof(data->time);
    }
 
    if (sampleType & PERF_RECORD_IP) {
        OsGetUsrIpInfo(regs->pc, &pc);
        size += OsPerfSaveIpInfo(p + size, &pc);
    }
 
    if (sampleType & PERF_RECORD_CALLCHAIN) {
        depth = OsPerfBackTrace(&callChain, PERF_MAX_CALLCHAIN_DEPTH, regs);
        size += OsPerfSaveBackTrace(p + size, &callChain, depth);
    }
 
    return size;
}

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OsPerfConfig()

STATIC UINT32 OsPerfConfig

(

PerfEventConfig *

eventsCfg

)

在文件 los_perf.c 第 81 行定义.

{
    UINT32 i;
    UINT32 ret;
 
    g_pmu = OsPerfPmuGet(eventsCfg->type);
    if (g_pmu == NULL) {
        PRINT_ERR("perf config type error %u!\n", eventsCfg->type);
        return LOS_ERRNO_PERF_INVALID_PMU;
    }
 
    UINT32 eventNum = MIN(eventsCfg->eventsNr, PERF_MAX_EVENT);
 
    (VOID)memset_s(&g_pmu->events, sizeof(PerfEvent), 0, sizeof(PerfEvent));
 
    for (i = 0; i < eventNum; i++) {
        g_pmu->events.per[i].eventId = eventsCfg->events[i].eventId;
        g_pmu->events.per[i].period = eventsCfg->events[i].period;
    }
    g_pmu->events.nr = i;
    g_pmu->events.cntDivided = eventsCfg->predivided;
    g_pmu->type = eventsCfg->type;
 
    ret = g_pmu->config();
    if (ret != LOS_OK) {
        PRINT_ERR("perf config failed!\n");
        (VOID)memset_s(&g_pmu->events, sizeof(PerfEvent), 0, sizeof(PerfEvent));
        return LOS_ERRNO_PERF_PMU_CONFIG_ERROR;
    }
    return LOS_OK;
}

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OsPerfFilter()

STATIC INLINE BOOL OsPerfFilter	(	UINT32	taskId,
		UINT32	processId
	)

在文件 los_perf.c 第 307 行定义.

{
    return OsFilterId(taskId, g_perfCb.taskIds, g_perfCb.taskIdsNr) &&
            OsFilterId(processId, g_perfCb.processIds, g_perfCb.processIdsNr);
}

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OsPerfGetCurrTime()

STATIC INLINE UINT64 OsPerfGetCurrTime

(

VOID

)

在文件 los_perf.c 第 50 行定义.

{
#ifdef LOSCFG_PERF_CALC_TIME_BY_TICK
    return LOS_TickCountGet();
#else
    return HalClockGetCycles();
#endif
}

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OsPerfHandleOverFlow()

VOID OsPerfHandleOverFlow	(	Event *	event,
		PerfRegs *	regs
	)

在文件 los_perf.c 第 350 行定义.

{
    PerfSampleData data;
    UINT32 len;
 
    (VOID)memset_s(&data, sizeof(PerfSampleData), 0, sizeof(PerfSampleData));
    if ((g_perfCb.needSample) && OsPerfFilter(LOS_CurTaskIDGet(), LOS_GetCurrProcessID())) {
        len = OsPerfCollectData(event, &data, regs);
        OsPerfOutputWrite((CHAR *)&data, len);
    }
}

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OsPerfHdrInit()

STATIC UINT32 OsPerfHdrInit

(

UINT32

id

)

在文件 los_perf.c 第 330 行定义.

{
    PerfDataHdr head = {
        .magic      = PERF_DATA_MAGIC_WORD,
        .sampleType = g_perfCb.sampleType,
        .sectionId  = id,
        .eventType  = g_pmu->type,
        .len        = sizeof(PerfDataHdr),
    };
    return OsPerfOutputWrite((CHAR *)&head, head.len);
}

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OsPerfInit()

STATIC UINT32 OsPerfInit

(

VOID

)

在文件 los_perf.c 第 362 行定义.

{
    UINT32 ret;
    if (g_perfCb.status != PERF_UNINIT) {
        ret = LOS_ERRNO_PERF_STATUS_INVALID;
        goto PERF_INIT_ERROR;
    }
 
    ret = OsPmuInit();
    if (ret != LOS_OK) {
        goto PERF_INIT_ERROR;
    }
 
    ret = OsPerfOutputInit(NULL, LOSCFG_PERF_BUFFER_SIZE);
    if (ret != LOS_OK) {
        ret = LOS_ERRNO_PERF_BUF_ERROR;
        goto PERF_INIT_ERROR;
    }
    g_perfCb.status = PERF_STOPPED;
PERF_INIT_ERROR:
    return ret;
}

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OsPerfParamValid()

STATIC INLINE UINT32 OsPerfParamValid

(

VOID

)

在文件 los_perf.c 第 313 行定义.

{
    UINT32 index;
    UINT32 res = 0;
 
    if (g_pmu == NULL) {
        return 0;
    }
    PerfEvent *events = &g_pmu->events;
    UINT32 eventNum = events->nr;
 
    for (index = 0; index < eventNum; index++) {
        res |= events->per[index].period;
    }
    return res;
}

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OsPerfPrintCount()

STATIC VOID OsPerfPrintCount

(

VOID

)

在文件 los_perf.c 第 113 行定义.

{
    UINT32 index;
    UINT32 intSave;
    UINT32 cpuid = ArchCurrCpuid();
 
    PerfEvent *events = &g_pmu->events;
    UINT32 eventNum = events->nr;
 
    PERF_LOCK(intSave);
    for (index = 0; index < eventNum; index++) {
        Event *event = &(events->per[index]);
 
        /* filter out event counter with no event binded. */
        if (event->period == 0) {
            continue;
        }
        PRINT_EMG("[%s] eventType: 0x%x [core %u]: %llu\n", g_pmu->getName(event), event->eventId, cpuid,
            event->count[cpuid]);
    }
    PERF_UNLOCK(intSave);
}

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OsPerfPrintTs()

STATIC INLINE VOID OsPerfPrintTs

(

VOID

)

在文件 los_perf.c 第 136 行定义.

{
#ifdef LOSCFG_PERF_CALC_TIME_BY_TICK
    DOUBLE time = (g_perfCb.endTime - g_perfCb.startTime) * 1.0 / LOSCFG_BASE_CORE_TICK_PER_SECOND;
#else
    DOUBLE time = (g_perfCb.endTime - g_perfCb.startTime) * 1.0 / OS_SYS_CLOCK;
#endif
    PRINT_EMG("time used: %.6f(s)\n", time);
}

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OsPerfSaveBackTrace()

STATIC INLINE UINT32 OsPerfSaveBackTrace	(	CHAR *	buf,
		PerfBackTrace *	callChain,
		UINT32	count
	)

在文件 los_perf.c 第 224 行定义.

{
    UINT32 i;
    *(UINT32 *)buf = count;
    UINT32 size = sizeof(UINT32);
    for (i = 0; i < count; i++) {
        size += OsPerfSaveIpInfo(buf + size, &(callChain->ip[i]));
    }
    return size;
}

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OsPerfSaveIpInfo()

STATIC INLINE UINT32 OsPerfSaveIpInfo	(	CHAR *	buf,
		IpInfo *	info
	)

在文件 los_perf.c 第 194 行定义.

{
    UINT32 size = 0;
#ifdef LOSCFG_KERNEL_VM
    UINT32 len = ALIGN(info->len, sizeof(size_t));
 
    *(UINTPTR *)buf = info->ip; /* save ip */
    size += sizeof(UINTPTR);
 
    *(UINT32 *)(buf + size) = len; /* save f_path length */
    size += sizeof(UINT32);
 
    if (strncpy_s(buf + size, REGION_PATH_MAX, info->f_path, info->len) != EOK) { /* save f_path */
        PRINT_ERR("copy f_path failed, %s\n", info->f_path);
    }
    size += len;
#else
    *(UINTPTR *)buf = info->ip; /* save ip */
    size += sizeof(UINTPTR);
#endif
    return size;
}

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OsPerfSetFilterIds()

STATIC INLINE VOID OsPerfSetFilterIds	(	UINT32 *	dstIds,
		UINT8 *	dstIdsNr,
		UINT32 *	ids,
		UINT32	idsNr
	)

在文件 los_perf.c 第 408 行定义.

{
    errno_t ret;
    if (idsNr) {
        ret = memcpy_s(dstIds, PERF_MAX_FILTER_TSKS * sizeof(UINT32), ids, idsNr * sizeof(UINT32));
        if (ret != EOK) {
            PRINT_ERR("In %s At line:%d execute memcpy_s error\n", __FUNCTION__, __LINE__);
            *dstIdsNr = 0;
            return;
        }
        *dstIdsNr = MIN(idsNr, PERF_MAX_FILTER_TSKS);
    } else {
        *dstIdsNr = 0;
    }
}

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OsPerfSetIrqRegs()

VOID OsPerfSetIrqRegs	(	UINTPTR	pc,
		UINTPTR	fp
	)

在文件 los_perf.c 第 537 行定义.

{
    LosTaskCB *runTask = (LosTaskCB *)ArchCurrTaskGet();
    runTask->pc = pc;
    runTask->fp = fp;
}

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OsPerfStart()

STATIC VOID OsPerfStart

(

VOID

)

在文件 los_perf.c 第 146 行定义.

{
    UINT32 cpuid = ArchCurrCpuid();
 
    if (g_pmu == NULL) {
        PRINT_ERR("pmu not registered!\n");
        return;
    }
 
    if (g_perfCb.pmuStatusPerCpu[cpuid] != PERF_PMU_STARTED) {
        UINT32 ret = g_pmu->start();
        if (ret != LOS_OK) {
            PRINT_ERR("perf start on core:%u failed, ret = 0x%x\n", cpuid, ret);
            return;
        }
 
        g_perfCb.pmuStatusPerCpu[cpuid] = PERF_PMU_STARTED;
    } else {
        PRINT_ERR("percpu status err %d\n", g_perfCb.pmuStatusPerCpu[cpuid]);
    }
}

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OsPerfStop()

STATIC VOID OsPerfStop

(

VOID

)

在文件 los_perf.c 第 168 行定义.

{
    UINT32 cpuid = ArchCurrCpuid();
 
    if (g_pmu == NULL) {
        PRINT_ERR("pmu not registered!\n");
        return;
    }
 
    if (g_perfCb.pmuStatusPerCpu[cpuid] != PERF_PMU_STOPED) {
        UINT32 ret = g_pmu->stop();
        if (ret != LOS_OK) {
            PRINT_ERR("perf stop on core:%u failed, ret = 0x%x\n", cpuid, ret);
            return;
        }
 
        if (!g_perfCb.needSample) {
            OsPerfPrintCount();
        }
 
        g_perfCb.pmuStatusPerCpu[cpuid] = PERF_PMU_STOPED;
    } else {
        PRINT_ERR("percpu status err %d\n", g_perfCb.pmuStatusPerCpu[cpuid]);
    }
}

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OsPerfUpdateEventCount()

VOID OsPerfUpdateEventCount	(	Event *	event,
		UINT32	value
	)

在文件 los_perf.c 第 342 行定义.

{
    if (event == NULL) {
        return;
    }
    event->count[ArchCurrCpuid()] += (value & 0xFFFFFFFF); /* event->count is UINT64 */
}

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OsPmuInit()

STATIC UINT32 OsPmuInit

(

VOID

)

在文件 los_perf.c 第 59 行定义.

{
#ifdef LOSCFG_PERF_HW_PMU
    if (OsHwPmuInit() != LOS_OK) {
        return LOS_ERRNO_PERF_HW_INIT_ERROR;
    }
#endif
 
#ifdef LOSCFG_PERF_TIMED_PMU
    if (OsTimedPmuInit() != LOS_OK) {
        return LOS_ERRNO_PERF_TIMED_INIT_ERROR;
    }
#endif
 
#ifdef LOSCFG_PERF_SW_PMU
    if (OsSwPmuInit() != LOS_OK) {
        return LOS_ERRNO_PERF_SW_INIT_ERROR;
    }
#endif
    return LOS_OK;
}

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PerfInfoDump()

STATIC VOID PerfInfoDump

(

VOID

)

在文件 los_perf.c 第 385 行定义.

{
    UINT32 i;
    if (g_pmu != NULL) {
        PRINTK("type: %d\n", g_pmu->type);
        for (i = 0; i < g_pmu->events.nr; i++) {
            PRINTK("events[%d]: %d, 0x%x\n", i, g_pmu->events.per[i].eventId, g_pmu->events.per[i].period);
        }
        PRINTK("predivided: %d\n", g_pmu->events.cntDivided);
    } else {
        PRINTK("pmu is NULL\n");
    }
 
    PRINTK("sampleType: 0x%x\n", g_perfCb.sampleType);
    for (i = 0; i < g_perfCb.taskIdsNr; i++) {
        PRINTK("filter taskIds[%d]: %d\n", i, g_perfCb.taskIds[i]);
    }
    for (i = 0; i < g_perfCb.processIdsNr; i++) {
        PRINTK("filter processIds[%d]: %d\n", i, g_perfCb.processIds[i]);
    }
    PRINTK("needSample: %d\n", g_perfCb.needSample);
}

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SPIN_LOCK_INIT()

LITE_OS_SEC_BSS SPIN_LOCK_INIT

(

g_perfSpin

)

变量说明

g_perfCb

STATIC PerfCB g_perfCb = {0}

在文件 los_perf.c 第 42 行定义.

g_pmu

STATIC Pmu* g_pmu = NULL

在文件 los_perf.c 第 41 行定义.