perf_sw_pmu.c 文件参考

浏览源代码.

函数
VOID	OsPerfHook (UINT32 eventType)
STATIC VOID	LOS_PerfMemAlloc (VOID *pool, VOID *ptr, UINT32 size)
STATIC VOID	LOS_PerfMuxPend (const LosMux *muxCB, UINT32 timeout)
STATIC VOID	LOS_PerfIsrEnter (UINT32 hwiNum)
STATIC VOID	LOS_PerfTaskSwitchedIn (const LosTaskCB *newTask, const LosTaskCB *runTask)
STATIC VOID	OsPerfCnvInit (VOID)
STATIC UINT32	OsPerfSwConfig (VOID)
STATIC UINT32	OsPerfSwStart (VOID)
STATIC UINT32	OsPerfSwStop (VOID)
STATIC CHAR *	OsPerfGetEventName (Event *event)
UINT32	OsSwPmuInit (VOID)

变量
STATIC SwPmu	g_perfSw
STATIC CHAR *	g_eventName [PERF_COUNT_SW_MAX]
STATIC UINT32	g_traceEventMap [PERF_COUNT_SW_MAX]

函数说明

LOS_PerfIsrEnter()

STATIC VOID LOS_PerfIsrEnter

(

UINT32

hwiNum

)

在文件 perf_sw_pmu.c 第 87 行定义.

{
    OsPerfHook(LOS_HOOK_TYPE_ISR_ENTER);
}

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LOS_PerfMemAlloc()

STATIC VOID LOS_PerfMemAlloc	(	VOID *	pool,
		VOID *	ptr,
		UINT32	size
	)

在文件 perf_sw_pmu.c 第 77 行定义.

{
    OsPerfHook(LOS_HOOK_TYPE_MEM_ALLOC);
}

函数调用图:

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LOS_PerfMuxPend()

STATIC VOID LOS_PerfMuxPend	(	const LosMux *	muxCB,
		UINT32	timeout
	)

在文件 perf_sw_pmu.c 第 82 行定义.

{
    OsPerfHook(LOS_HOOK_TYPE_MUX_PEND);
}

函数调用图:

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LOS_PerfTaskSwitchedIn()

STATIC VOID LOS_PerfTaskSwitchedIn	(	const LosTaskCB *	newTask,
		const LosTaskCB *	runTask
	)

在文件 perf_sw_pmu.c 第 92 行定义.

{
    OsPerfHook(LOS_HOOK_TYPE_TASK_SWITCHEDIN);
}

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OsPerfCnvInit()

STATIC VOID OsPerfCnvInit

(

VOID

)

在文件 perf_sw_pmu.c 第 97 行定义.

{
    LOS_HookReg(LOS_HOOK_TYPE_MEM_ALLOC, LOS_PerfMemAlloc);
    LOS_HookReg(LOS_HOOK_TYPE_MUX_PEND, LOS_PerfMuxPend);
    LOS_HookReg(LOS_HOOK_TYPE_ISR_ENTER, LOS_PerfIsrEnter);
    LOS_HookReg(LOS_HOOK_TYPE_TASK_SWITCHEDIN, LOS_PerfTaskSwitchedIn);
}

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OsPerfGetEventName()

STATIC CHAR * OsPerfGetEventName

(

Event *

event

)

在文件 perf_sw_pmu.c 第 144 行定义.

{
    UINT32 eventId = event->eventId;
    if (eventId < PERF_COUNT_SW_MAX) {
        return g_eventName[eventId];
    }
    return "unknown";
}

这是这个函数的调用关系图:

OsPerfHook()

VOID OsPerfHook

(

UINT32

eventType

)

在文件 perf_sw_pmu.c 第 50 行定义.

{
    if (!g_perfSw.enable) {
        return;
    }
 
    PerfEvent *events = &g_perfSw.pmu.events;
    UINT32 eventNum = events->nr;
 
    UINT32 i;
    PerfRegs regs;
 
    (VOID)memset_s(&regs, sizeof(PerfRegs), 0, sizeof(PerfRegs));
 
    for (i = 0; i < eventNum; i++) {
        Event *event = &(events->per[i]);
        if (event->counter == eventType) {
            OsPerfUpdateEventCount(event, 1);
            if (event->count[ArchCurrCpuid()] % event->period == 0) {
                OsPerfFetchCallerRegs(&regs);
                OsPerfHandleOverFlow(event, &regs);
            }
            return;
        }
    }
}

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OsPerfSwConfig()

STATIC UINT32 OsPerfSwConfig

(

VOID

)

在文件 perf_sw_pmu.c 第 105 行定义.

{
    UINT32 i;
    PerfEvent *events = &g_perfSw.pmu.events;
    UINT32 eventNum = events->nr;
 
    for (i = 0; i < eventNum; i++) {
        Event *event = &(events->per[i]);
        if ((event->eventId < PERF_COUNT_SW_TASK_SWITCH) || (event->eventId >= PERF_COUNT_SW_MAX) ||
            (event->period == 0)) {
            return LOS_NOK;
        }
        event->counter = g_traceEventMap[event->eventId];
    }
    return LOS_OK;
}

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OsPerfSwStart()

STATIC UINT32 OsPerfSwStart

(

VOID

)

在文件 perf_sw_pmu.c 第 122 行定义.

{
    UINT32 i;
    UINT32 cpuid = ArchCurrCpuid();
    PerfEvent *events = &g_perfSw.pmu.events;
    UINT32 eventNum = events->nr;
 
    for (i = 0; i < eventNum; i++) {
        Event *event = &(events->per[i]);
        event->count[cpuid] = 0;
    }
 
    g_perfSw.enable = TRUE;
    return LOS_OK;
}

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OsPerfSwStop()

STATIC UINT32 OsPerfSwStop

(

VOID

)

在文件 perf_sw_pmu.c 第 138 行定义.

{
    g_perfSw.enable = FALSE;
    return LOS_OK;
}

这是这个函数的调用关系图:

OsSwPmuInit()

UINT32 OsSwPmuInit

(

VOID

)

在文件 perf_sw_pmu.c 第 153 行定义.

{
    g_perfSw.pmu = (Pmu) {
        .type    = PERF_EVENT_TYPE_SW,
        .config  = OsPerfSwConfig,
        .start   = OsPerfSwStart,
        .stop    = OsPerfSwStop,
        .getName = OsPerfGetEventName,
    };
 
    g_perfSw.enable = FALSE;
 
    OsPerfCnvInit();
 
    (VOID)memset_s(&g_perfSw.pmu.events, sizeof(PerfEvent), 0, sizeof(PerfEvent));
    return OsPerfPmuRegister(&g_perfSw.pmu);
}

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变量说明

g_eventName

STATIC CHAR* g_eventName[PERF_COUNT_SW_MAX]

初始值:

= {
    [PERF_COUNT_SW_TASK_SWITCH]  = "task switch",
    [PERF_COUNT_SW_IRQ_RESPONSE] = "irq response",
    [PERF_COUNT_SW_MEM_ALLOC]    = "mem alloc",
    [PERF_COUNT_SW_MUX_PEND]     = "mux pend",
}

在文件 perf_sw_pmu.c 第 36 行定义.

g_perfSw

STATIC SwPmu g_perfSw

在文件 perf_sw_pmu.c 第 35 行定义.

g_traceEventMap

STATIC UINT32 g_traceEventMap[PERF_COUNT_SW_MAX]

初始值:

= {
    [PERF_COUNT_SW_TASK_SWITCH]  = LOS_HOOK_TYPE_TASK_SWITCHEDIN,
    [PERF_COUNT_SW_IRQ_RESPONSE] = LOS_HOOK_TYPE_ISR_ENTER,
    [PERF_COUNT_SW_MEM_ALLOC]    = LOS_HOOK_TYPE_MEM_ALLOC,
    [PERF_COUNT_SW_MUX_PEND]     = LOS_HOOK_TYPE_MUX_PEND,
}

在文件 perf_sw_pmu.c 第 43 行定义.