C++ (Cpp) paravirt_steal_clock示例

示例#1

文件： cputime.c 项目： ReneNyffenegger/linux

/*
 * When a guest is interrupted for a longer amount of time, missed clock
 * ticks are not redelivered later. Due to that, this function may on
 * occasion account more time than the calling functions think elapsed.
 */
static __always_inline u64 steal_account_process_time(u64 maxtime)
{
#ifdef CONFIG_PARAVIRT
	if (static_key_false(&paravirt_steal_enabled)) {
		u64 steal;

		steal = paravirt_steal_clock(smp_processor_id());
		steal -= this_rq()->prev_steal_time;
		steal = min(steal, maxtime);
		account_steal_time(steal);
		this_rq()->prev_steal_time += steal;

		return steal;
	}
#endif
	return 0;
}

示例#2

文件： cputime.c 项目： sombree/Hulk-Kernel-V2

static __always_inline bool steal_account_process_tick(void)
{
#ifdef CONFIG_PARAVIRT
	if (static_key_false(&paravirt_steal_enabled)) {
		u64 steal, st = 0;

		steal = paravirt_steal_clock(smp_processor_id());
		steal -= this_rq()->prev_steal_time;

		st = steal_ticks(steal);
		this_rq()->prev_steal_time += st * TICK_NSEC;

		account_steal_time(st);
		return st;
	}
#endif
	return false;
}

示例#3

文件： cputime.c 项目： acton393/linux

/*
 * When a guest is interrupted for a longer amount of time, missed clock
 * ticks are not redelivered later. Due to that, this function may on
 * occasion account more time than the calling functions think elapsed.
 */
static __always_inline cputime_t steal_account_process_time(cputime_t maxtime)
{
#ifdef CONFIG_PARAVIRT
	if (static_key_false(&paravirt_steal_enabled)) {
		cputime_t steal_cputime;
		u64 steal;

		steal = paravirt_steal_clock(smp_processor_id());
		steal -= this_rq()->prev_steal_time;

		steal_cputime = min(nsecs_to_cputime(steal), maxtime);
		account_steal_time(steal_cputime);
		this_rq()->prev_steal_time += cputime_to_nsecs(steal_cputime);

		return steal_cputime;
	}
#endif
	return 0;
}