perf_stat.c 文件参考

浏览源代码.

函数
static int	GetEvents (const char *argv)
static int	GetTids (const char *argv)
static int	GetPids (const char *argv)
static int	PerfStatAttrInit (void)
void	PerfStat (int fd, int argc, char **argv)

变量
static PerfConfigAttr	g_statAttr
static PerfOption	g_statOpts []

函数说明

GetEvents()

static int GetEvents ( const char *  argv )

inlinestatic

在文件 perf_stat.c 第 41 行定义.

{
    return ParseEvents(argv, &g_statAttr.eventsCfg, &g_statAttr.eventsCfg.eventsNr);
}

函数调用图:

GetPids()

static int GetPids ( const char *  argv )

inlinestatic

在文件 perf_stat.c 第 51 行定义.

{
    return ParseIds(argv, (int *)g_statAttr.processIds, &g_statAttr.processIdsNr);
}

函数调用图:

GetTids()

static int GetTids ( const char *  argv )

inlinestatic

在文件 perf_stat.c 第 46 行定义.

{
    return ParseIds(argv, (int *)g_statAttr.taskIds, &g_statAttr.taskIdsNr);
}

函数调用图:

PerfStat()

void PerfStat	(	int	fd,
		int	argc,
		char **	argv
	)

在文件 perf_stat.c 第 107 行定义.

{
    int ret;
    int child;
    SubCmd cmd = {0};
 
    if (argc < 3) { /* perf stat argc is at least 3 */
        return;
    }
 
    ret = PerfStatAttrInit();
    if (ret != 0) {
        printf("perf stat attr init failed\n");
        return;
    }
 
    ret = ParseOptions(argc - 2, &argv[2], g_statOpts, &cmd); /* parse option and cmd begin at index 2 */
    if (ret != 0) {
        printf("parse error\n");
        return;
    }
 
    ret = PerfConfig(fd, &g_statAttr);
    if (ret != 0) {
        printf("perf config failed\n");
        return;
    }
 
    PerfStart(fd, 0);
    child = fork();
    if (child < 0) {
        printf("fork error\n");
        goto EXIT;
    } else if (child == 0) {
        (void)execve(cmd.path, cmd.params, NULL);
        exit(0);
    }
 
    (void)waitpid(child, 0, 0);
EXIT:
    PerfStop(fd);
}

函数调用图:

这是这个函数的调用关系图:

PerfStatAttrInit()

static int PerfStatAttrInit ( void  )

static

在文件 perf_stat.c 第 65 行定义.

{
    PerfConfigAttr attr = {
        .eventsCfg = {
#ifdef LOSCFG_PERF_HW_PMU
            .type = PERF_EVENT_TYPE_HW,
            .events = {
                [0] = {PERF_COUNT_HW_CPU_CYCLES, 0xFFFF},
                [1] = {PERF_COUNT_HW_INSTRUCTIONS, 0xFFFFFF00},
                [2] = {PERF_COUNT_HW_ICACHE_REFERENCES, 0xFFFF},
                [3] = {PERF_COUNT_HW_DCACHE_REFERENCES, 0xFFFF},
            },
            .eventsNr = 4, /* 4 events */
#elif defined LOSCFG_PERF_TIMED_PMU
            .type = PERF_EVENT_TYPE_TIMED,
            .events = {
                [0] = {PERF_COUNT_CPU_CLOCK, 100},
            },
            .eventsNr = 1, /* 1 event */
#elif defined LOSCFG_PERF_SW_PMU
            .type = PERF_EVENT_TYPE_SW,
            .events = {
                [0] = {PERF_COUNT_SW_TASK_SWITCH, 1},
                [1] = {PERF_COUNT_SW_IRQ_RESPONSE, 1},
                [2] = {PERF_COUNT_SW_MEM_ALLOC, 1},
                [3] = {PERF_COUNT_SW_MUX_PEND, 1},
            },
            .eventsNr = 4, /* 4 events */
#endif
            .predivided = 0,
        },
        .taskIds = {0},
        .taskIdsNr = 0,
        .processIds = {0},
        .processIdsNr = 0,
        .needSample = 0,
        .sampleType = 0,
    };
 
    return memcpy_s(&g_statAttr, sizeof(PerfConfigAttr), &attr, sizeof(PerfConfigAttr)) != EOK ? -1 : 0;
}

这是这个函数的调用关系图:

变量说明

g_statAttr

PerfConfigAttr g_statAttr

static

在文件 perf_stat.c 第 39 行定义.

g_statOpts

PerfOption g_statOpts[]

static

初始值:

= {
    OPTION_CALLBACK("-e", GetEvents),
    OPTION_CALLBACK("-t", GetTids),
    OPTION_CALLBACK("-P", GetPids),
    OPTION_UINT("-p", &g_statAttr.eventsCfg.events[0].period),
    OPTION_UINT("-s", &g_statAttr.sampleType),
    OPTION_UINT("-d", &g_statAttr.eventsCfg.predivided),
}

在文件 perf_stat.c 第 56 行定义.