events: Harmonize event field names and print output names

Now that we can filter based on fields via perf record, people
will start using filter expressions and will expect them to
be obvious.

The primary way to see which fields are available is by looking
at the trace output, such as:

  gcc-18676 [000]   343.011728: irq_handler_entry: irq=0 handler=timer
  cc1-18677 [000]   343.012727: irq_handler_entry: irq=0 handler=timer
  cc1-18677 [000]   343.032692: irq_handler_entry: irq=0 handler=timer
  cc1-18677 [000]   343.033690: irq_handler_entry: irq=0 handler=timer
  cc1-18677 [000]   343.034687: irq_handler_entry: irq=0 handler=timer
  cc1-18677 [000]   343.035686: irq_handler_entry: irq=0 handler=timer
  cc1-18677 [000]   343.036684: irq_handler_entry: irq=0 handler=timer

While 'irq==0' filters work, the 'handler==<x>' filter expression
does not work:

  $ perf record -R -f -a -e irq:irq_handler_entry --filter handler=timer sleep 1
   Error: failed to set filter with 22 (Invalid argument)

The problem is that while an 'irq' field exists and is recognized
as a filter field - 'handler' does not exist - its name is 'name'
in the output.

To solve this, we need to synchronize the printout and the field
names, wherever possible.

In cases where the printout prints a non-field, we enclose
that information in square brackets, such as:

  perf-1380  [013]   724.903505: softirq_exit: vec=9 [action=RCU]
  perf-1380  [013]   724.904482: softirq_exit: vec=1 [action=TIMER]

This way users can use filter expressions more intuitively: all
fields that show up as 'primary' (non-bracketed) information is
filterable.

This patch harmonizes the field names for all irq, bkl, power,
sched and timer events.

We might in fact think about dropping the print format bit of
generic tracepoints altogether, and just print the fields that
are being recorded.

Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 39 insertions, 40 deletions

diff --git a/include/trace/events/timer.h b/include/trace/events/timer.h
index 1844c48d640e..e5ce87a0498d 100644
--- a/include/trace/events/timer.h
+++ b/include/trace/events/timer.h
@@ -26,7 +26,7 @@ TRACE_EVENT(timer_init,
                 __entry->timer  = timer;
         ),
 
-        TP_printk("timer %p", __entry->timer)
+        TP_printk("timer=%p", __entry->timer)
 );
 
 /**
@@ -54,7 +54,7 @@ TRACE_EVENT(timer_start,
                 __entry->now            = jiffies;
         ),
 
-        TP_printk("timer %p: func %pf, expires %lu, timeout %ld",
+        TP_printk("timer=%p function=%pf expires=%lu [timeout=%ld]",
                   __entry->timer, __entry->function, __entry->expires,
                   (long)__entry->expires - __entry->now)
 );
@@ -81,7 +81,7 @@ TRACE_EVENT(timer_expire_entry,
                 __entry->now            = jiffies;
         ),
 
-        TP_printk("timer %p: now %lu", __entry->timer, __entry->now)
+        TP_printk("timer=%p now=%lu", __entry->timer, __entry->now)
 );
 
 /**
@@ -108,7 +108,7 @@ TRACE_EVENT(timer_expire_exit,
                 __entry->timer  = timer;
         ),
 
-        TP_printk("timer %p", __entry->timer)
+        TP_printk("timer=%p", __entry->timer)
 );
 
 /**
@@ -129,7 +129,7 @@ TRACE_EVENT(timer_cancel,
                 __entry->timer  = timer;
         ),
 
-        TP_printk("timer %p", __entry->timer)
+        TP_printk("timer=%p", __entry->timer)
 );
 
 /**
@@ -140,24 +140,24 @@ TRACE_EVENT(timer_cancel,
  */
 TRACE_EVENT(hrtimer_init,
 
-        TP_PROTO(struct hrtimer *timer, clockid_t clockid,
+        TP_PROTO(struct hrtimer *hrtimer, clockid_t clockid,
                  enum hrtimer_mode mode),
 
-        TP_ARGS(timer, clockid, mode),
+        TP_ARGS(hrtimer, clockid, mode),
 
         TP_STRUCT__entry(
-                __field( void *,                timer           )
+                __field( void *,                hrtimer         )
                 __field( clockid_t,             clockid         )
                 __field( enum hrtimer_mode,     mode            )
         ),
 
         TP_fast_assign(
-                __entry->timer          = timer;
+                __entry->hrtimer        = hrtimer;
                 __entry->clockid        = clockid;
                 __entry->mode           = mode;
         ),
 
-        TP_printk("hrtimer %p, clockid %s, mode %s", __entry->timer,
+        TP_printk("hrtimer=%p clockid=%s mode=%s", __entry->hrtimer,
                   __entry->clockid == CLOCK_REALTIME ?
                         "CLOCK_REALTIME" : "CLOCK_MONOTONIC",
                   __entry->mode == HRTIMER_MODE_ABS ?
@@ -170,26 +170,26 @@ TRACE_EVENT(hrtimer_init,
  */
 TRACE_EVENT(hrtimer_start,
 
-        TP_PROTO(struct hrtimer *timer),
+        TP_PROTO(struct hrtimer *hrtimer),
 
-        TP_ARGS(timer),
+        TP_ARGS(hrtimer),
 
         TP_STRUCT__entry(
-                __field( void *,        timer           )
+                __field( void *,        hrtimer         )
                 __field( void *,        function        )
                 __field( s64,           expires         )
                 __field( s64,           softexpires     )
         ),
 
         TP_fast_assign(
-                __entry->timer          = timer;
-                __entry->function       = timer->function;
-                __entry->expires        = hrtimer_get_expires(timer).tv64;
-                __entry->softexpires    = hrtimer_get_softexpires(timer).tv64;
+                __entry->hrtimer        = hrtimer;
+                __entry->function       = hrtimer->function;
+                __entry->expires        = hrtimer_get_expires(hrtimer).tv64;
+                __entry->softexpires    = hrtimer_get_softexpires(hrtimer).tv64;
         ),
 
-        TP_printk("hrtimer %p, func %pf, expires %llu, softexpires %llu",
-                  __entry->timer, __entry->function,
+        TP_printk("hrtimer=%p function=%pf expires=%llu softexpires=%llu",
+                  __entry->hrtimer, __entry->function,
                   (unsigned long long)ktime_to_ns((ktime_t) {
                                   .tv64 = __entry->expires }),
                   (unsigned long long)ktime_to_ns((ktime_t) {
@@ -206,23 +206,22 @@ TRACE_EVENT(hrtimer_start,
  */
 TRACE_EVENT(hrtimer_expire_entry,
 
-        TP_PROTO(struct hrtimer *timer, ktime_t *now),
+        TP_PROTO(struct hrtimer *hrtimer, ktime_t *now),
 
-        TP_ARGS(timer, now),
+        TP_ARGS(hrtimer, now),
 
         TP_STRUCT__entry(
-                __field( void *,        timer   )
+                __field( void *,        hrtimer )
                 __field( s64,           now     )
         ),
 
         TP_fast_assign(
-                __entry->timer  = timer;
-                __entry->now    = now->tv64;
+                __entry->hrtimer        = hrtimer;
+                __entry->now            = now->tv64;
         ),
 
-        TP_printk("hrtimer %p, now %llu", __entry->timer,
-                  (unsigned long long)ktime_to_ns((ktime_t) {
-                                  .tv64 = __entry->now }))
+        TP_printk("hrtimer=%p now=%llu", __entry->hrtimer,
+                  (unsigned long long)ktime_to_ns((ktime_t) { .tv64 = __entry->now }))
  );
 
 /**
@@ -234,40 +233,40 @@ TRACE_EVENT(hrtimer_expire_entry,
  */
 TRACE_EVENT(hrtimer_expire_exit,
 
-        TP_PROTO(struct hrtimer *timer),
+        TP_PROTO(struct hrtimer *hrtimer),
 
-        TP_ARGS(timer),
+        TP_ARGS(hrtimer),
 
         TP_STRUCT__entry(
-                __field( void *,        timer   )
+                __field( void *,        hrtimer )
         ),
 
         TP_fast_assign(
-                __entry->timer  = timer;
+                __entry->hrtimer        = hrtimer;
         ),
 
-        TP_printk("hrtimer %p", __entry->timer)
+        TP_printk("hrtimer=%p", __entry->hrtimer)
 );
 
 /**
  * hrtimer_cancel - called when the hrtimer is canceled
- * @timer:      pointer to struct hrtimer
+ * @hrtimer:    pointer to struct hrtimer
  */
 TRACE_EVENT(hrtimer_cancel,
 
-        TP_PROTO(struct hrtimer *timer),
+        TP_PROTO(struct hrtimer *hrtimer),
 
-        TP_ARGS(timer),
+        TP_ARGS(hrtimer),
 
         TP_STRUCT__entry(
-                __field( void *,        timer   )
+                __field( void *,        hrtimer )
         ),
 
         TP_fast_assign(
-                __entry->timer  = timer;
+                __entry->hrtimer        = hrtimer;
         ),
 
-        TP_printk("hrtimer %p", __entry->timer)
+        TP_printk("hrtimer=%p", __entry->hrtimer)
 );
 
 /**
@@ -302,7 +301,7 @@ TRACE_EVENT(itimer_state,
                 __entry->interval_usec  = value->it_interval.tv_usec;
         ),
 
-        TP_printk("which %d, expires %lu, it_value %lu.%lu, it_interval %lu.%lu",
+        TP_printk("which=%d expires=%lu it_value=%lu.%lu it_interval=%lu.%lu",
                   __entry->which, __entry->expires,
                   __entry->value_sec, __entry->value_usec,
                   __entry->interval_sec, __entry->interval_usec)
@@ -332,7 +331,7 @@ TRACE_EVENT(itimer_expire,
                 __entry->pid    = pid_nr(pid);
         ),
 
-            TP_printk("which %d, pid %d, now %lu", __entry->which,
+            TP_printk("which=%d pid=%d now=%lu", __entry->which,
                       (int) __entry->pid, __entry->now)
 );