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| author | Thomas Gleixner <tglx@linutronix.de> | 2015-05-27 00:50:31 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-06-19 15:18:27 +0200 |
| commit | c74441a17eb975b604e339ca6c11b9ab9aaca11f (patch) | |
| tree | 4f58ae369bac98352a65a9c47f4c83ba3ffd9b05 /kernel | |
| parent | timer: Replace timer base by a cpu index (diff) | |
| download | linux-c74441a17eb975b604e339ca6c11b9ab9aaca11f.tar.xz linux-c74441a17eb975b604e339ca6c11b9ab9aaca11f.zip | |
timer: Stats: Simplify the flags handling
Simplify the handling of the flag storage for the timer statistics. No
intermediate storage anymore. Just hand over the flags field.
I left the printout of 'deferrable' for now because changing this
would be an ABI update and I have no idea how strong people feel about
that. OTOH, I wonder whether we should kill the whole timer stats
stuff because all of that information can be retrieved via ftrace/perf
as well.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Joonwoo Park <joonwoop@codeaurora.org>
Cc: Wenbo Wang <wenbo.wang@memblaze.com>
Link: http://lkml.kernel.org/r/20150526224512.046626248@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/timer.c | 7 | ||||
| -rw-r--r-- | kernel/time/timer_stats.c | 10 |
2 files changed, 7 insertions, 10 deletions
diff --git a/kernel/time/timer.c b/kernel/time/timer.c index 1540af9f62eb..3398d93c74a7 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -404,15 +404,12 @@ void __timer_stats_timer_set_start_info(struct timer_list *timer, void *addr) static void timer_stats_account_timer(struct timer_list *timer) { - unsigned int flag = 0; - if (likely(!timer->start_site)) return; - if (unlikely(timer->flags & TIMER_DEFERRABLE)) - flag |= TIMER_STATS_FLAG_DEFERRABLE; timer_stats_update_stats(timer, timer->start_pid, timer->start_site, - timer->function, timer->start_comm, flag); + timer->function, timer->start_comm, + timer->flags); } #else diff --git a/kernel/time/timer_stats.c b/kernel/time/timer_stats.c index 1fb08f21302e..1adecb4b87c8 100644 --- a/kernel/time/timer_stats.c +++ b/kernel/time/timer_stats.c @@ -68,7 +68,7 @@ struct entry { * Number of timeout events: */ unsigned long count; - unsigned int timer_flag; + u32 flags; /* * We save the command-line string to preserve @@ -227,13 +227,13 @@ static struct entry *tstat_lookup(struct entry *entry, char *comm) * @startf: pointer to the function which did the timer setup * @timerf: pointer to the timer callback function of the timer * @comm: name of the process which set up the timer + * @tflags: The flags field of the timer * * When the timer is already registered, then the event counter is * incremented. Otherwise the timer is registered in a free slot. */ void timer_stats_update_stats(void *timer, pid_t pid, void *startf, - void *timerf, char *comm, - unsigned int timer_flag) + void *timerf, char *comm, u32 tflags) { /* * It doesn't matter which lock we take: @@ -251,7 +251,7 @@ void timer_stats_update_stats(void *timer, pid_t pid, void *startf, input.start_func = startf; input.expire_func = timerf; input.pid = pid; - input.timer_flag = timer_flag; + input.flags = tflags; raw_spin_lock_irqsave(lock, flags); if (!timer_stats_active) @@ -306,7 +306,7 @@ static int tstats_show(struct seq_file *m, void *v) for (i = 0; i < nr_entries; i++) { entry = entries + i; - if (entry->timer_flag & TIMER_STATS_FLAG_DEFERRABLE) { + if (entry->flags & TIMER_DEFERRABLE) { seq_printf(m, "%4luD, %5d %-16s ", entry->count, entry->pid, entry->comm); } else { |