Messages in this thread Patch in this message | | | Date | Fri, 10 Feb 2017 16:28:28 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: timers: Make flags output in the timer_start tracepoint useful |
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On Fri, 10 Feb 2017, Steven Rostedt wrote:
> On Fri, 10 Feb 2017 15:37:11 +0100 (CET) > Thomas Gleixner <tglx@linutronix.de> wrote: > > > > > --- a/include/trace/events/timer.h > > > > +++ b/include/trace/events/timer.h > > > > @@ -36,6 +36,13 @@ DEFINE_EVENT(timer_class, timer_init, > > > > TP_ARGS(timer) > > > > ); > > > > > > > > +#define decode_timer_flags(flags) \ > > > > + __print_flags(flags, "|", \ > > > > + { TIMER_MIGRATING, "M" }, \ > > > > + { TIMER_DEFERRABLE, "D" }, \ > > > > + { TIMER_PINNED, "P" }, \ > > > > + { TIMER_IRQSAFE, "I" }) > > > > + > > > > /** > > > > * timer_start - called when the timer is started > > > > * @timer: pointer to struct timer_list > > > > @@ -65,9 +72,12 @@ TRACE_EVENT(timer_start, > > > > __entry->flags = flags; > > > > ), > > > > > > > > - TP_printk("timer=%p function=%pf expires=%lu [timeout=%ld] flags=0x%08x", > > > > + TP_printk("timer=%p function=%pf expires=%lu [timeout=%ld] cpu=%u idx=%u flags=%s", > > > > __entry->timer, __entry->function, __entry->expires, > > > > - (long)__entry->expires - __entry->now, __entry->flags) > > > > + (long)__entry->expires - __entry->now, > > > > + __entry->flags & TIMER_CPUMASK, > > > > + __entry->flags >> TIMER_ARRAYSHIFT, > > > > + decode_timer_flags(__entry->flags & TIMER_TRACE_FLAGMASK)) > > > > > > Hi Thomas, > > > > > > This all looks good, but I can't find TIMER_TRACE_FLAGMASK. Was that > > > added by another patch? > > > > -ENO_QUILT_REFRESH .... > > I'm wondering if it wouldn't just make sense to add another mask in > include/linux/timer.h along with the other TIMER macros?
That's the missing hunk from timer.h which I did not refresh after testing it ....
--- a/include/linux/timer.h +++ b/include/linux/timer.h @@ -66,6 +66,8 @@ struct timer_list { #define TIMER_ARRAYSHIFT 22 #define TIMER_ARRAYMASK 0xFFC00000 +#define TIMER_TRACE_FLAGMASK (TIMER_MIGRATING | TIMER_DEFERRABLE | TIMER_PINNED | TIMER_IRQSAFE) + #define __TIMER_INITIALIZER(_function, _expires, _data, _flags) { \ .entry = { .next = TIMER_ENTRY_STATIC }, \ .function = (_function), \
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