ip; }); epoll_create(512) = 3 clock_gettime(CLOCK_MONOTONIC, {tv_sec=2244208, tv_nsec...MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4173b8c000 clock_gettime(CLOCK_MONOTONIC, {tv_sec=2244208, tv_nsec...=659365294}) = 0 clock_gettime(CLOCK_MONOTONIC, {tv_sec=2244208, tv_nsec=659391969}) = 0 clock_gettime...(CLOCK_MONOTONIC, {tv_sec=2244208, tv_nsec=659414437}) = 0 epoll_wait(3, [{EPOLLIN, {u32=37374768, u64...=37374768}}], 4096, 500) = 1 clock_gettime(CLOCK_MONOTONIC, {tv_sec=2244208, tv_nsec=660754983}) = 0
clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=0}, 0x7fff52691980) = 0 clock_nanosleep(CLOCK_REALTIME..., 0, {tv_sec=0, tv_nsec=0}, 0x7fff52691980) = 0 clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec...=0}, 0x7fff52691980) = 0 clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=0}, 0x7fff52691980) =...0 clock_nanosleep(CLOCK_REALTIME, 0, {tv_sec=0, tv_nsec=0}, 0x7fff52691980) = 0 exit_group(0) 这下好了!
timespec由秒和纳秒组成,其定义如下(代码位于include/uapi/linux/time.h): struct timespec { __kernel_time_t tv_sec; long tv_nsec...tv_nsec:存放自上一秒开始经过的纳秒(ns)数。...struct timespec64 { time64_t tv_sec; long tv_nsec; }; 这个结构体中的变量定义和timespec一样,只不过tv_sec的类型一定是64位无符号数...所以,这个结构体其实和timespec结构体大同小异,tv_sec存的值是一样的,而只需要将timespec中的tv_nsec除以1000就是timeval中的tv_usec。
CLOCK_MONOTONIC)return 0; if (clock_base[id] == 0.0) { clock_base[id] = ts->tv_sec * 1000000000.0 + ts->tv_nsec...[id] = clock_base[id]; } else { //mutex.lock(); double tick = ts->tv_sec * 1000000000.0 + ts->tv_nsec...tick - clock_base[id]) * time_scale; ts->tv_sec = (time_t)(clock_new[id] / 1000000000.0); ts->tv_nsec...[id] = clock_base[id]; } else { //mutex.lock(); double tick = ts->tv_sec * 1000000000.0 + ts->tv_nsec...tick - clock_base[id]) * time_scale; ts->tv_sec = (time_t)(clock_new[id] / 1000000000.0); ts->tv_nsec
, sa_mask=[], sa_flags=0}, 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 nanosleep({tv_sec=1, tv_nsec..., sa_mask=[], sa_flags=0}, 8) = 0 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 nanosleep({tv_sec=1, tv_nsec...15.936624 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 23:05:15.936672 nanosleep({tv_sec=1, tv_nsec
. */ if (abstime->tv_nsec tv_nsec >= 1000000000) return EINVAL; int pshared...to a relative timeout. */ rt.tv_sec = abstime->tv_sec - tv.tv_sec; rt.tv_nsec = abstime->tv_nsec...to a relative timeout. */ rt.tv_sec = abstime->tv_sec - rt.tv_sec; rt.tv_nsec = abstime->tv_nsec...timeout value to a relative timeout. */ rt.tv_sec = abstime->tv_sec - tv.tv_sec; rt.tv_nsec = abstime->tv_nsec
函数参数中数据结构如下: struct timespec { time_t tv_sec; /* Seconds */ long tv_nsec; /* Nanoseconds */ }; struct
siginfo_t *pInfo ); typedef unsigned long time_t; struct timespec { time_t tv_sec; long tv_nsec
start, struct timespec *end) { return end->tv_sec - start->tv_sec + (end->tv_nsec...- start->tv_nsec) * 1e-9; } int main() { struct timespec start, end; double time_used = 0.0
PERF_EVENT_IOC_SET_BPF, 3) = 0 ioctl(4, PERF_EVENT_IOC_ENABLE, 0) = 0 nanosleep({tv_sec=1, tv_nsec...pathname="/sys/fs/bpf/map_bpftest_execve_map", bpf_fd=0, file_flags=0}, 120) = 5 nanosleep({tv_sec=0, tv_nsec
(_TIMESPEC_DEFINED) #define _TIMESPEC_DEFINED struct timespec { time_t tv_sec; long tv_nsec
)的不同是 参数是时间 rmtp不为NULL时 – 用于存储sleep()/nanosleep()因为signal提前返回而剩余的时长 定时为0时(secs=0;rqtp->tv_sec=rqtp->tv_nsec
= 13 munmap(0x7fc021320000, 2101248) = 0 clock_gettime(CLOCK_MONOTONIC, {tv_sec=238, tv_nsec
timespec 结构体定义如下: struct timespec { time_t tv_sec; /* seconds */ long tv_nsec; /* nanoseconds...tv_nsec:以纳秒为单位的时间。 timerfd_settime timerfd_settime 是用于设置和启动定时器的函数,它与 timerfd_create 一起使用来控制定时器的行为。
struct timespec { time_t tv_sec; /* Seconds */ long tv_nsec
timespec有两个成员,一个是秒,一个是纳秒, 所以最高精确度是纳秒. 1 struct timespec 2 { 3 time_t tv_sec; /* seconds */ 4 long tv_nsec
itimerspec timespec { .it_interval = { .tv_sec = 5, .tv_nsec...= 0, }, .it_value = { .tv_sec = 5, .tv_nsec
timespec *tp); 其中就用到了struct timespec结构体 struct timespec { __kernel_time_t tv_sec; /* seconds */ long tv_nsec
NULL) = 0 write(1, "\n", 1) = 1 clock_gettime(CLOCK_MONOTONIC, {tv_sec=35737, tv_nsec
requested == NULL) { timeout = TIMEOUT_ZERO; } else if (requested->tv_sec == 0 && requested->tv_nsec...TIMEOUT_INFINITE; } else { timeout = TIMEOUT_FINITE; if (requested->tv_sec > 0 || requested->tv_nsec...requested->tv_sec < total.tv_sec || (requested->tv_sec == total.tv_sec && requested->tv_nsec...remaining.tv_sec = requested->tv_sec - total.tv_sec; if ((remaining.tv_nsec = requested->tv_nsec...ALOGV("requested %ld.%03ld elapsed %ld.%03ld", requested->tv_sec, requested->tv_nsec
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