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authorFrederic Weisbecker <fweisbec@gmail.com>2015-12-11 03:27:25 +0100
committerFrederic Weisbecker <fweisbec@gmail.com>2016-03-02 16:42:15 +0100
commite6e6cc22e067a6f44449aa8fd0328404079c3ba5 (patch)
treea1e33f1b5e0c0cd1193bdf0e906fff97021c0d67 /kernel/time
parentd027d45d8a17a4145eab2d841140e9acbb7feb59 (diff)
downloadlinux-e6e6cc22e067a6f44449aa8fd0328404079c3ba5.tar.bz2
nohz: Use enum code for tick stop failure tracing message
It makes nohz tracing more lightweight, standard and easier to parse. Examples: user_loop-2904 [007] d..1 517.701126: tick_stop: success=1 dependency=NONE user_loop-2904 [007] dn.1 518.021181: tick_stop: success=0 dependency=SCHED posix_timers-6142 [007] d..1 1739.027400: tick_stop: success=0 dependency=POSIX_TIMER user_loop-5463 [007] dN.1 1185.931939: tick_stop: success=0 dependency=PERF_EVENTS Suggested-by: Peter Zijlstra <peterz@infradead.org> Reviewed-by: Chris Metcalf <cmetcalf@ezchip.com> Cc: Christoph Lameter <cl@linux.com> Cc: Chris Metcalf <cmetcalf@ezchip.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Luiz Capitulino <lcapitulino@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/tick-sched.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 74ab7dbdc023..47e5ac45ce69 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -163,22 +163,22 @@ static unsigned long tick_dep_mask;
static void trace_tick_dependency(unsigned long dep)
{
if (dep & TICK_DEP_MASK_POSIX_TIMER) {
- trace_tick_stop(0, "posix timers running\n");
+ trace_tick_stop(0, TICK_DEP_MASK_POSIX_TIMER);
return;
}
if (dep & TICK_DEP_MASK_PERF_EVENTS) {
- trace_tick_stop(0, "perf events running\n");
+ trace_tick_stop(0, TICK_DEP_MASK_PERF_EVENTS);
return;
}
if (dep & TICK_DEP_MASK_SCHED) {
- trace_tick_stop(0, "more than 1 task in runqueue\n");
+ trace_tick_stop(0, TICK_DEP_MASK_SCHED);
return;
}
if (dep & TICK_DEP_MASK_CLOCK_UNSTABLE)
- trace_tick_stop(0, "unstable sched clock\n");
+ trace_tick_stop(0, TICK_DEP_MASK_CLOCK_UNSTABLE);
}
static bool can_stop_full_tick(struct tick_sched *ts)
@@ -206,17 +206,17 @@ static bool can_stop_full_tick(struct tick_sched *ts)
}
if (!sched_can_stop_tick()) {
- trace_tick_stop(0, "more than 1 task in runqueue\n");
+ trace_tick_stop(0, TICK_DEP_MASK_SCHED);
return false;
}
if (!posix_cpu_timers_can_stop_tick(current)) {
- trace_tick_stop(0, "posix timers running\n");
+ trace_tick_stop(0, TICK_DEP_MASK_POSIX_TIMER);
return false;
}
if (!perf_event_can_stop_tick()) {
- trace_tick_stop(0, "perf events running\n");
+ trace_tick_stop(0, TICK_DEP_MASK_PERF_EVENTS);
return false;
}
@@ -228,7 +228,7 @@ static bool can_stop_full_tick(struct tick_sched *ts)
* sched_clock_stable is set.
*/
if (!sched_clock_stable()) {
- trace_tick_stop(0, "unstable sched clock\n");
+ trace_tick_stop(0, TICK_DEP_MASK_CLOCK_UNSTABLE);
/*
* Don't allow the user to think they can get
* full NO_HZ with this machine.
@@ -821,7 +821,7 @@ static ktime_t tick_nohz_stop_sched_tick(struct tick_sched *ts,
ts->last_tick = hrtimer_get_expires(&ts->sched_timer);
ts->tick_stopped = 1;
- trace_tick_stop(1, " ");
+ trace_tick_stop(1, TICK_DEP_MASK_NONE);
}
/*