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nohz: Use enum code for tick stop failure tracing message

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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>
This commit is contained in:
Frederic Weisbecker 2015-12-11 03:27:25 +01:00
parent d027d45d8a
commit e6e6cc22e0
3 changed files with 41 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

36
include/trace/events/timer.h
View file

@ -328,23 +328,49 @@ TRACE_EVENT(itimer_expire,
);
#ifdef CONFIG_NO_HZ_COMMON
#define TICK_DEP_NAMES \
tick_dep_name(NONE) \
tick_dep_name(POSIX_TIMER) \
tick_dep_name(PERF_EVENTS) \
tick_dep_name(SCHED) \
tick_dep_name_end(CLOCK_UNSTABLE)
#undef tick_dep_name
#undef tick_dep_name_end
#define tick_dep_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
#define tick_dep_name_end(sdep) TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep);
TICK_DEP_NAMES
#undef tick_dep_name
#undef tick_dep_name_end
#define tick_dep_name(sdep) { TICK_DEP_MASK_##sdep, #sdep },
#define tick_dep_name_end(sdep) { TICK_DEP_MASK_##sdep, #sdep }
#define show_tick_dep_name(val) \
__print_symbolic(val, TICK_DEP_NAMES)
TRACE_EVENT(tick_stop,
TP_PROTO(int success, char *error_msg),
TP_PROTO(int success, int dependency),
TP_ARGS(success, error_msg),
TP_ARGS(success, dependency),
TP_STRUCT__entry(
__field( int , success )
__string( msg, error_msg )
__field( int , dependency )
),
TP_fast_assign(
__entry->success = success;
__assign_str(msg, error_msg);
__entry->dependency = dependency;
),
TP_printk("success=%s msg=%s", __entry->success ? "yes" : "no", __get_str(msg))
TP_printk("success=%d dependency=%s", __entry->success, \
show_tick_dep_name(__entry->dependency))
);
#endif