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Author SHA1 Message Date
Ingo Molnar
cdd6c482c9 perf: Do the big rename: Performance Counters -> Performance Events 
Bye-bye Performance Counters, welcome Performance Events!

In the past few months the perfcounters subsystem has grown out its
initial role of counting hardware events, and has become (and is
becoming) a much broader generic event enumeration, reporting, logging,
monitoring, analysis facility.

Naming its core object 'perf_counter' and naming the subsystem
'perfcounters' has become more and more of a misnomer. With pending
code like hw-breakpoints support the 'counter' name is less and
less appropriate.

All in one, we've decided to rename the subsystem to 'performance
events' and to propagate this rename through all fields, variables
and API names. (in an ABI compatible fashion)

The word 'event' is also a bit shorter than 'counter' - which makes
it slightly more convenient to write/handle as well.

Thanks goes to Stephane Eranian who first observed this misnomer and
suggested a rename.

User-space tooling and ABI compatibility is not affected - this patch
should be function-invariant. (Also, defconfigs were not touched to
keep the size down.)

This patch has been generated via the following script:

  FILES=$(find * -type f | grep -vE 'oprofile|[^K]config')

  sed -i \
    -e 's/PERF_EVENT_/PERF_RECORD_/g' \
    -e 's/PERF_COUNTER/PERF_EVENT/g' \
    -e 's/perf_counter/perf_event/g' \
    -e 's/nb_counters/nb_events/g' \
    -e 's/swcounter/swevent/g' \
    -e 's/tpcounter_event/tp_event/g' \
    $FILES

  for N in $(find . -name perf_counter.[ch]); do
    M=$(echo $N | sed 's/perf_counter/perf_event/g')
    mv $N $M
  done

  FILES=$(find . -name perf_event.*)

  sed -i \
    -e 's/COUNTER_MASK/REG_MASK/g' \
    -e 's/COUNTER/EVENT/g' \
    -e 's/\<event\>/event_id/g' \
    -e 's/counter/event/g' \
    -e 's/Counter/Event/g' \
    $FILES

... to keep it as correct as possible. This script can also be
used by anyone who has pending perfcounters patches - it converts
a Linux kernel tree over to the new naming. We tried to time this
change to the point in time where the amount of pending patches
is the smallest: the end of the merge window.

Namespace clashes were fixed up in a preparatory patch - and some
stylistic fallout will be fixed up in a subsequent patch.

( NOTE: 'counters' are still the proper terminology when we deal
  with hardware registers - and these sed scripts are a bit
  over-eager in renaming them. I've undone some of that, but
  in case there's something left where 'counter' would be
  better than 'event' we can undo that on an individual basis
  instead of touching an otherwise nicely automated patch. )

Suggested-by: Stephane Eranian <eranian@google.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Paul Mackerras <paulus@samba.org>
Reviewed-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: <linux-arch@vger.kernel.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 2009-09-21 14:28:04 +02:00
Ingo Molnar
8886f42d6d perf trace: Fix parsing of perf.data 
We started parsing perf.data at head 0. This caused -D to
segfault and it could possibly also case incorrect trace
entries to be displayed.

Parse it at data_offset instead.

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>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 2009-09-03 16:19:57 +02:00
Ingo Molnar
6ddf259da7 perf trace: Sample timestamps as well 
Before:

            perf-21082 [013]     0.000000: sched_wakeup_new: task perf:21083 [120] success=1 [015]
            perf-21082 [013]     0.000000: sched_migrate_task: task perf:21082 [120] from: 13  to: 15
            perf-21082 [013]     0.000000: sched_process_fork: parent perf:21082  child perf:21083
            true-21083 [015]     0.000000: sched_wakeup: task migration/15:33 [0] success=1 [015]
            perf-21082 [013]     0.000000: sched_switch: task perf:21082 [120] (S) ==> swapper:0 [140]
            true-21083 [015]     0.000000: sched_switch: task perf:21083 [120] (R) ==> migration/15:33 [0]
            true-21083 [011]     0.000000: sched_process_exit: task true:21083 [120]

After:

            perf-21082 [013] 14674.797613: sched_wakeup_new: task perf:21083 [120] success=1 [015]
            perf-21082 [013] 14674.797506: sched_migrate_task: task perf:21082 [120] from: 13  to: 15
            perf-21082 [013] 14674.797610: sched_process_fork: parent perf:21082  child perf:21083
            true-21083 [015] 14674.797725: sched_wakeup: task migration/15:33 [0] success=1 [015]
            perf-21082 [013] 14674.797722: sched_switch: task perf:21082 [120] (S) ==> swapper:0 [140]
            true-21083 [015] 14674.797729: sched_switch: task perf:21083 [120] (R) ==> migration/15:33 [0]
            true-21083 [011] 14674.798159: sched_process_exit: task true:21083 [120]

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>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 2009-09-03 15:45:49 +02:00
Ingo Molnar
cd6feeeafd perf trace: Sample the CPU too 
Sample, record, parse and print the CPU field - it had all zeroes before.

Before (watch the second column, the CPU values):

            perf-32685 [000]     0.000000: sched_wakeup_new: task perf:32686 [120] success=1 [011]
            perf-32685 [000]     0.000000: sched_migrate_task: task perf:32685 [120] from: 1  to: 11
            perf-32685 [000]     0.000000: sched_process_fork: parent perf:32685  child perf:32686
            true-32686 [000]     0.000000: sched_wakeup: task migration/11:25 [0] success=1 [011]
            true-32686 [000]     0.000000: sched_wakeup: task distccd:12793 [125] success=1 [015]
            true-32686 [000]     0.000000: sched_wakeup: task distccd:12793 [125] success=1 [015]
            perf-32685 [000]     0.000000: sched_switch: task perf:32685 [120] (S) ==> swapper:0 [140]
            true-32686 [000]     0.000000: sched_switch: task perf:32686 [120] (R) ==> migration/11:25 [0]
            true-32686 [000]     0.000000: sched_switch: task perf:32686 [120] (R) ==> distccd:12793 [125]
            true-32686 [000]     0.000000: sched_switch: task true:32686 [120] (R) ==> distccd:12793 [125]
            true-32686 [000]     0.000000: sched_process_exit: task true:32686 [120]
            true-32686 [000]     0.000000: sched_stat_wait: task: distccd:12793 wait: 6767985949080 [ns]
            true-32686 [000]     0.000000: sched_stat_wait: task: distccd:12793 wait: 6767986139446 [ns]
            true-32686 [000]     0.000000: sched_stat_sleep: task: distccd:12793 sleep: 132844 [ns]
            true-32686 [000]     0.000000: sched_stat_sleep: task: distccd:12793 sleep: 131724 [ns]

After:

            perf-32685 [001]     0.000000: sched_wakeup_new: task perf:32686 [120] success=1 [011]
            perf-32685 [001]     0.000000: sched_migrate_task: task perf:32685 [120] from: 1  to: 11
            perf-32685 [001]     0.000000: sched_process_fork: parent perf:32685  child perf:32686
            true-32686 [011]     0.000000: sched_wakeup: task migration/11:25 [0] success=1 [011]
            true-32686 [015]     0.000000: sched_wakeup: task distccd:12793 [125] success=1 [015]
            true-32686 [015]     0.000000: sched_wakeup: task distccd:12793 [125] success=1 [015]
            perf-32685 [001]     0.000000: sched_switch: task perf:32685 [120] (S) ==> swapper:0 [140]
            true-32686 [011]     0.000000: sched_switch: task perf:32686 [120] (R) ==> migration/11:25 [0]
            true-32686 [015]     0.000000: sched_switch: task perf:32686 [120] (R) ==> distccd:12793 [125]
            true-32686 [015]     0.000000: sched_switch: task true:32686 [120] (R) ==> distccd:12793 [125]
            true-32686 [015]     0.000000: sched_process_exit: task true:32686 [120]
            true-32686 [015]     0.000000: sched_stat_wait: task: distccd:12793 wait: 6767985949080 [ns]
            true-32686 [015]     0.000000: sched_stat_wait: task: distccd:12793 wait: 6767986139446 [ns]
            true-32686 [015]     0.000000: sched_stat_sleep: task: distccd:12793 sleep: 132844 [ns]
            true-32686 [015]     0.000000: sched_stat_sleep: task: distccd:12793 sleep: 131724 [ns]

So we can now see how this workload migrated between CPUs.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 2009-09-02 21:28:50 +02:00
Frederic Weisbecker
3a2684ca58 perf tools: Resolve idle thread cmdline for perf trace 
The cmd-trace tool used the cmdline file and resolved the idle
thread using a hardcoded check for the 0 task pid.

Now we have a centralized way to do that from perf using
register_idle_thread() API.

Before:
	:0-0     [000]     0.000000: irq_handler_entry: irq=0 handler=name
	:0-0     [000]     0.000000: irq_handler_entry: irq=0 handler=name

After:
	[idle]-0     [000]     0.000000: irq_handler_entry: irq=0 handler=name
	[idle]-0     [000]     0.000000: irq_handler_entry: irq=0 handler=name

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1251693921-6579-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 2009-08-31 10:04:48 +02:00
Masami Hiramatsu
1909629fb1 perf trace: Add OPT_END to option array of perf-trace 
Add OPT_END to option array of perf-trace for fixing a SEGV bug when
showing perf-trace help message.

Without this patch;
 ./perf trace -h

 usage: perf trace [<options>] <command>

    -D, --dump-raw-trace  dump raw trace in ASCII
    -v, --verbose         be more verbose (show symbol address, etc)
    -f, Segmentation fault

With this patch:
 ./perf trace -h

 usage: perf trace [<options>] <command>

    -D, --dump-raw-trace  dump raw trace in ASCII
    -v, --verbose         be more verbose (show symbol address, etc)

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Zhaolei <zhaolei@cn.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <20090821185603.11039.62109.stgit@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 2009-08-21 21:42:43 +02:00
Frederic Weisbecker
4bf2364a95 perf tools: Warn while running perf trace without sample 
When a user runs perf trace using an input with logged
counters without PERF_SAMPLE_RAW attribute, warn by giving a
nice tip.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1250543271-8383-2-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 2009-08-18 00:00:18 +02:00
Frederic Weisbecker
5f9c39dca5 perf tools: Add perf trace 
This adds perf trace into the set of perf tools.

It is written to fetch the tracepoint samples from perf events
and display them, according to the events information given by
the debugfs files through the util/trace* tools.

It is a rough first shot and doesn't yet handle the cpu,
timestamps fields and some other things.

Example:

 perf record -f -e workqueue:workqueue_execution:record -F 1 -a
 perf trace

       kblockd/0-236   [000]     0.000000: workqueue_execution: thread=:236 func=cfq_kick_queue+0x0
     kondemand/0-360   [000]     0.000000: workqueue_execution: thread=:360 func=do_dbs_timer+0x0
     kondemand/0-360   [000]     0.000000: workqueue_execution: thread=:360 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0
     kondemand/1-361   [000]     0.000000: workqueue_execution: thread=:361 func=do_dbs_timer+0x0

Todo:

- A lot of things!

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: "Luis Claudio R. Goncalves" <lclaudio@uudg.org>
Cc: Clark Williams <williams@redhat.com>
Cc: Jon Masters <jonathan@jonmasters.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Zhaolei <zhaolei@cn.fujitsu.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: "Frank Ch. Eigler" <fche@redhat.com>
Cc: Roland McGrath <roland@redhat.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Jiaying Zhang <jiayingz@google.com>
Cc: Anton Blanchard <anton@samba.org>
LKML-Reference: <1250518688-7207-4-git-send-email-fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
 2009-08-17 16:32:39 +02:00