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  1. 30 7月, 2011 15 次提交
  3. 21 7月, 2011 7 次提交
  5. 16 7月, 2011 12 次提交
  7. 15 7月, 2011 1 次提交
  9. 05 7月, 2011 1 次提交
    • A
      perf report/annotate/script: Add option to specify a CPU range · 5d67be97
      由 Anton Blanchard 提交于 
      Add an option to perf report/annotate/script to specify which
CPUs to operate on. This enables us to take a single system wide
profile and analyse each CPU (or group of CPUs) in isolation.

This was useful when profiling a multiprocess workload where the
bottleneck was on one CPU but this was hidden in the overall
profile. Per process and per thread breakdowns didn't help
because multiple processes were running on each CPU and no
single process consumed an entire CPU.

The patch converts the list of CPUs returned by cpu_map__new
into a bitmap for fast lookup. I wanted to use -C to be
consistent with perf top/record/stat, but unfortunately perf
report already uses -C <comms>.

 v2: Incorporate suggestions from David Ahern:
	- Added -c to perf script
	- Check that SAMPLE_CPU is set when -c is used
	- Update documentation

 v3: Create perf_session__cpu_bitmap()
Signed-off-by: NAnton Blanchard <anton@samba.org>
Acked-by: NDavid Ahern <dsahern@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Link: http://lkml.kernel.org/r/20110704215750.11647eb9@krytenSigned-off-by: NIngo Molnar <mingo@elte.hu>
      5d67be97
  11. 02 7月, 2011 1 次提交
  13. 01 7月, 2011 1 次提交
    • Z
      perf stat: Add noise output for csv mode · 3ae9a34d
      由 Zhengyu He 提交于 
      Previously, when you want perf-stat to output the statistics in
csv mode, no information of the noise will be printed out.

For example right now we output this --repeat information:

 ./perf stat -r3 -x, sleep 1
 1.164789,task-clock
 8,context-switches
 0,CPU-migrations
 219,page-faults
 3337800,cycles

With this patch, the output will be appended with an additional
entry for the noise value:

 ./perf stat -r3 -x, sleep 1
 1.164789,task-clock,3.75%
 8,context-switches,75.00%
 0,CPU-migrations,100.00%
 219,page-faults,0.00%
 3337800,cycles,3.36%
Signed-off-by: NZhengyu He <zhengyuh@google.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Stephane Eranian <eranian@google.com>
Cc: Venkatesh Pallipadi <venki@google.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1308861942-4945-1-git-send-email-zhengyuh@google.comSigned-off-by: NIngo Molnar <mingo@elte.hu>
      3ae9a34d
  15. 30 6月, 2011 2 次提交
    • F
      perf tools: Only display parent field if explictly sorted · cb1955b8
      由 Frederic Weisbecker 提交于 
      We don't need to display the parent field if the parent
sorting machinery is only used for parent filtering
(as in "-p foo").

However if parent filtering is used in combination with
explicit parent sorting ( -s parent), we want to
display it.

Result with:

  perf report -p kernel_thread -s parent

Before:

 # Overhead  Parent symbol
 # ........  .............
 #
     0.07%
            |
            --- ioread8
                ata_sff_check_status
                ata_sff_tf_load
                ata_sff_qc_issue
                ata_bmdma_qc_issue
                ata_qc_issue
                ata_scsi_translate
                ata_scsi_queuecmd
                scsi_dispatch_cmd
                scsi_request_fn
                __blk_run_queue
                __make_request
                generic_make_request
                submit_bio
                submit_bh
                journal_submit_commit_record
                jbd2_journal_commit_transaction
                kjournald2
                kthread
                kernel_thread_helpe

After:

 # Overhead  Parent symbol
 # ........  .............
 #
     0.07%  kernel_thread_helper
            |
            --- ioread8
                ata_sff_check_status
                ata_sff_tf_load
                ata_sff_qc_issue
                ata_bmdma_qc_issue
                ata_qc_issue
                ata_scsi_translate
                ata_scsi_queuecmd
                scsi_dispatch_cmd
                scsi_request_fn
                __blk_run_queue
                __make_request
                generic_make_request
                submit_bio
                submit_bh
                journal_submit_commit_record
                jbd2_journal_commit_transaction
                kjournald2
                kthread
                kernel_thread_helper
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Sam Liao <phyomh@gmail.com>
      cb1955b8
    • F
      perf tools: Allow sort dimensions to be registered more than once · fd8ea212
      由 Frederic Weisbecker 提交于 
      So that the parent sort dimension can be registered twice: once
if we add it as an explicit sort dimension (-s parent) and twice
if we request a parent filter (-p foo).

We'll have only one parent sort dimension in the end but this
allows to override the default parent filter with we gave in "-p"
option. The goal of this is to prepare to allow the use of
"-s parent" and "-p foo" at the same time, ie: sort by filtered
parent.
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Sam Liao <phyomh@gmail.com>
      fd8ea212