ktime_t start = ktime_get(); ``` 接下来,我们可以使用ktime_to_ms()和ktime_to_us()函数将ktime_t值转换为毫秒或微秒。这两个函数分别接受一个ktime_t类型的参数,并返回相应的毫秒或微秒数。例如: ``` ktime_t start = ktime_get(); u64 start_ms = ktime_to_ms(start); ``` 此外...
ktime_after函数和ktime_before函数用于比较ktime_t类型的变量cmp1是否在cmp2之前或之后,其调用ktime_compare得到结果后,再和0做比较以得到结果。 //128~157行#if BITS_PER_LONG < 64externs64__ktime_divns(constktime_tkt,s64div);staticinlines64ktime_divns(constktime_tkt,s64div){BUG_ON(div<0...
下面是一些常见的ktime用法: 1.获取当前时间: ```c ktime_t current_time = ktime_get(); ``` 2.将ktime转换为纳秒: ```c s64 ns = ktime_to_ns(current_time); ``` 3.将纳秒转换为ktime: ```c ktime_t time = ns_to_ktime(ns); ``` 4.获取两个ktime之间的时间差: ```c k...
ktime_t ktime_get(void) { struct timekeeper *tk = &tk_core.timekeeper; unsigned int seq; ktime_t base; u64 nsecs; WARN_ON(timekeeping_suspended); do { seq = read_seqcount_begin(&tk_core.seq); base = tk->tkr_mono.base; nsecs = timekeeping_get_ns(&tk->tkr_mono); } while ...
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...
ktime_t until = { .tv64 = KTIME_MAX }; ktime_t until = KTIME_MAX; long ret = 0; if (timeout) { @@ -1311,7 +1311,7 @@ static long read_events(struct kioctx *ctx, long min_nr, long nr, * the ringbuffer empty. So in practice we should be ok, but it's * something...
● 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...
static inline int ktime_equal(const ktime_t cmp1, const ktime_t cmp2) { return cmp1 == cmp2; } /** * ktime_compare - Compares two ktime_t variables for less, greater or equal * @cmp1: comparable12 changes: 1 addition & 1 deletion 2 net/ipv6/mip6.c Original file line ...
ktime_t to_wait) { if (!io_napi(ctx)) return; __io_napi_adjust_timeout(ctx, iowq, ts); __io_napi_adjust_timeout(ctx, iowq, to_wait); } static inline void io_napi_busy_loop(struct io_ring_ctx *ctx, @@ -88,7 +88,7 @@ static inline void io_napi_add(struct io_kiocb...