【Android】Kernel添加时间戳

    #include <linux/ktime.h>
    long long thermal_get_current_time_ms(void)
    {
    long long temp;
    struct timespec64 t;
    ktime_get_ts64(&t);
    temp = (((long long) t.tv_sec) * 1000000 + (long)t.tv_nsec/1000);
    return (temp/1000);
}

c中static 受到编译器的影响 禁止使用long long类型.所以debug的时候还是去掉static的申明.

    long long time_diff,start_timestamp,end_timestamp;

    start_timestamp = thermal_get_current_time_ms();

    end_timestamp = thermal_get_current_time_ms();
    time_diff = end_timestamp - start_timestamp;
    printk("[time] timestamp_diff = %lld ms",time_diff);