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Commit 8119e492 authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
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Merge "time: sched_clock: record cycle count in suspend and resume"

parents 765841a2 00ff7d46

kernel/time/sched_clock.c

+11 −0
Original line number Diff line number Diff line
@@ -32,6 +32,10 @@ struct clock_data { 
static struct hrtimer sched_clock_timer;

static int irqtime = -1;

static int initialized;

static u64 suspend_ns;

static u64 suspend_cycles;

static u64 resume_cycles;





core_param(irqtime, irqtime, int, 0400);
@@ -200,6 +204,11 @@ void __init sched_clock_postinit(void) 
static int sched_clock_suspend(void)

{

	update_sched_clock();



	suspend_ns = cd.epoch_ns;

	suspend_cycles = cd.epoch_cyc;

	pr_info("suspend ns:%17llu	suspend cycles:%17llu\n",

				cd.epoch_ns, cd.epoch_cyc);

	hrtimer_cancel(&sched_clock_timer);

	cd.suspended = true;

	return 0;
@@ -208,6 +217,8 @@ static int sched_clock_suspend(void) 
static void sched_clock_resume(void)

{

	cd.epoch_cyc = read_sched_clock();

	resume_cycles = cd.epoch_cyc;

	pr_info("resume cycles:%17llu\n", cd.epoch_cyc);

	hrtimer_start(&sched_clock_timer, cd.wrap_kt, HRTIMER_MODE_REL);

	cd.suspended = false;

}