ktime_set函数就是用来设置这个时间戳的数值的,通过传入一个秒数和纳秒数,可以将其转换成一个ktime_t类型的时间戳。 使用ktime_set函数可以方便地操作时间戳,比如在定时器中设置触发时间、在事件处理程序中记录事件发生时间等等。在编写驱动程序或者内核模块时,经常会用到这个函数来处理时间相关的操作。 除了ktime_...
0, 0); lock->stat.max_time = ktime_set(0,...0); lock->stat.last_time = ktime_set(0, 0); #endif // 初始化flag lock->flags = (type & WAKE_LOCK_TYPE_MASK...lock_count = lock->stat.count; int expire_count = lock->stat.expire_count; ktime_t active_time = ktime_set...
ktime_add_ns宏和ktime_sub_ns宏分别用于将纳秒值加到ktime_t类型的时间变量上和从ktime_t类型的时间变量中减去纳秒值。本质上这两个函数和上面的add、sub是相同的。 //71~74行staticinlinektime_ttimespec64_to_ktime(structtimespec64ts){returnktime_set(ts.tv_sec,ts.tv_nsec);} timespec64_to_kt...
ktime_t delay = ktime_set(seconds, nanoseconds); ktime_t expiry_time = ktime_add(ktime_get(), delay); while (ktime_before(ktime_get(), expiry_time)) { //等待... } ``` 这只是ktime的一些基本用法示例,ktime还有许多其他功能和操作,如计算时间相对值、比较时间等。在具体的应用场景中...
ktime.h 定义了内核时间相关的数据结构和函数，核心是ktime_t，它表示纳秒级内核时间，不随系统时钟变化。ktime.h还包含用于内核时间操作的宏和函数。ktime.h是timer.h的一部分，对驱动开发中使用定时器至关重要。ktime.h内含ktime_get、ktime_set等函数，用于获取和设置时间值。对比另一个用于一般...
Development version of the Upstream MultiPath TCP Linux kernel 🐧 - mptcp_net-next/include/linux/ktime.h at 35b210855069ae34450eeaafc0f1b5bfa4f71c87 · multipath-tcp/mptcp_net-next
void timerfd_clock_was_set(void) { ktime_t moffs = ktime_mono_to_real((ktime_t){ .tv64 = 0 }); ktime_t moffs = ktime_mono_to_real(0); struct timerfd_ctx *ctx; unsigned long flags; @@ -102,8 +102,8 @@ void timerfd_clock_was_set(void) if (!ctx->might_cancel) conti...
● tstamp (of type ktime_t ) : time stamp of receiving the packet. – net_enable_timestamp() must be called in order to get values. net_device ● net_device represents a network interface card. ● There are cases...
(unlikely(last_ktime >= ktime_to_ns(cur_ktime))) { pr_err("failed to get ktime, last ktime is %llu, " "current ktime is %llu\n", last_ktime, ktime_to_ns(cur_ktime)); BUG(); } last_ktime = ktime_to_ns(cur_ktime); return cur_ktime; } EXPORT_SYMBOL_GPL(ktime_...
ktime_t format: */ static inline ktime_t timespec_to_ktime(struct timespec ts) { return ktime_set(ts.tv_sec, ts.tv_nsec); } /* convert a timeval to ktime_t format: */ static inline ktime_t timeval_to_ktime(struct timeval tv) { return ktime_set(tv.tv_sec, tv.tv_...