perf_record.h 文件参考

浏览源代码.

函数
void	PerfRecord (int fd, int argc, char **argv)

函数说明

PerfRecord()

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

在文件 perf_record.c 第 146 行定义.

{
    int ret;
    int child;
    char *buf;
    ssize_t len;
    SubCmd cmd = {0};
 
    if (argc < 3) { /* perf record argc is at least 3 */
        return;
    }
 
    ret = PerfRecordAttrInit();
    if (ret != 0) {
        printf("perf record attr init failed\n");
        return;
    }
 
    ret = ParseOptions(argc - 2, &argv[2], g_recordOpts, &cmd); /* parse option and cmd begin at index 2 */
    if (ret != 0) {
        printf("parse error\n");
        return;
    }
 
    ret = PerfConfig(fd, &g_recordAttr);
    if (ret != 0) {
        printf("perf config failed\n");
        return;
    }
 
    PerfStart(fd, 0);
    child = fork();
    if (child < 0) {
        printf("fork error\n");
        PerfStop(fd);
        return;
    } else if (child == 0) {
        (void)execve(cmd.path, cmd.params, NULL);
        exit(0);
    }
 
    waitpid(child, 0, 0);
    PerfStop(fd);
 
    buf = (char *)malloc(LOSCFG_PERF_BUFFER_SIZE);
    if (buf == NULL) {
        printf("no memory for read perf 0x%x\n", LOSCFG_PERF_BUFFER_SIZE);
        return;
    }
    len = PerfRead(fd, buf, LOSCFG_PERF_BUFFER_SIZE);
    ret = PerfWriteFile(g_savePath, buf, len);
    if (ret == 0) {
        printf("save perf data success at %s\n", g_savePath);
    } else {
        printf("save perf data failed at %s\n", g_savePath);
    }
    free(buf);
}

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