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  1. 26 Oct, 2011 1 commit
  2. 07 Oct, 2011 1 commit
  3. 23 Sep, 2011 1 commit
  4. 18 Aug, 2011 1 commit
  5. 25 Jul, 2011 1 commit
  6. 03 Jun, 2011 2 commits
  7. 02 Jun, 2011 2 commits
  8. 22 May, 2011 1 commit
  9. 15 May, 2011 2 commits
    • Arnaldo Carvalho de Melo's avatar
      perf evlist: Fix per thread mmap setup · aece948f
      Arnaldo Carvalho de Melo authored
      
      
      The PERF_EVENT_IOC_SET_OUTPUT ioctl was returning -EINVAL when using
      --pid when monitoring multithreaded apps, as we can only share a ring
      buffer for events on the same thread if not doing per cpu.
      
      Fix it by using per thread ring buffers.
      
      Tested with:
      
      [root@felicio ~]# tuna -t 26131 -CP | nl
        1                      thread       ctxt_switches
        2    pid SCHED_ rtpri affinity voluntary nonvoluntary             cmd
        3 26131   OTHER     0      0,1  10814276      2397830 chromium-browse
        4  642    OTHER     0      0,1     14688            0 chromium-browse
        5  26148  OTHER     0      0,1    713602       115479 chromium-browse
        6  26149  OTHER     0      0,1    801958         2262 chromium-browse
        7  26150  OTHER     0      0,1   1271128          248 chromium-browse
        8  26151  OTHER     0      0,1         3            0 chromium-browse
        9  27049  OTHER     0      0,1     36796            9 chromium-browse
       10  618    OTHER     0      0,1     14711            0 chromium-browse
       11  661    OTHER     0      0,1     14593            0 chromium-browse
       12  29048  OTHER     0      0,1     28125            0 chromium-browse
       13  26143  OTHER     0      0,1   2202789          781 chromium-browse
      [root@felicio ~]#
      
      So 11 threads under pid 26131, then:
      
      [root@felicio ~]# perf record -F 50000 --pid 26131
      
      [root@felicio ~]# grep perf_event /proc/`pidof perf`/maps | nl
        1 7fa4a2538000-7fa4a25b9000 rwxs 00000000 00:09 4064 anon_inode:[perf_event]
        2 7fa4a25b9000-7fa4a263a000 rwxs 00000000 00:09 4064 anon_inode:[perf_event]
        3 7fa4a263a000-7fa4a26bb000 rwxs 00000000 00:09 4064 anon_inode:[perf_event]
        4 7fa4a26bb000-7fa4a273c000 rwxs 00000000 00:09 4064 anon_inode:[perf_event]
        5 7fa4a273c000-7fa4a27bd000 rwxs 00000000 00:09 4064 anon_inode:[perf_event]
        6 7fa4a27bd000-7fa4a283e000 rwxs 00000000 00:09 4064 anon_inode:[perf_event]
        7 7fa4a283e000-7fa4a28bf000 rwxs 00000000 00:09 4064 anon_inode:[perf_event]
        8 7fa4a28bf000-7fa4a2940000 rwxs 00000000 00:09 4064 anon_inode:[perf_event]
        9 7fa4a2940000-7fa4a29c1000 rwxs 00000000 00:09 4064 anon_inode:[perf_event]
       10 7fa4a29c1000-7fa4a2a42000 rwxs 00000000 00:09 4064 anon_inode:[perf_event]
       11 7fa4a2a42000-7fa4a2ac3000 rwxs 00000000 00:09 4064 anon_inode:[perf_event]
      [root@felicio ~]#
      
      11 mmaps, one per thread since we didn't specify any CPU list, so we need one
      mmap per thread and:
      
      [root@felicio ~]# perf record -F 50000 --pid 26131
      ^M
      ^C[ perf record: Woken up 79 times to write data ]
      [ perf record: Captured and wrote 20.614 MB perf.data (~900639 samples) ]
      
      [root@felicio ~]# perf report -D | grep PERF_RECORD_SAMPLE | cut -d/ -f2 | cut -d: -f1 | sort -n | uniq -c | sort -nr | nl
           1	 371310 26131
           2	  96516 26148
           3	  95694 26149
           4	  95203 26150
           5	   7291 26143
           6	     87 27049
           7	     76 661
           8	     60 29048
           9	     47 618
          10	     43 642
      [root@felicio ~]#
      
      Ok, one of the threads, 26151 was quiescent, so no samples there, but all the
      others are there.
      
      Then, if I specify one CPU:
      
      [root@felicio ~]# perf record -F 50000 --pid 26131 --cpu 1
      ^C[ perf record: Woken up 1 times to write data ]
      [ perf record: Captured and wrote 0.680 MB perf.data (~29730 samples) ]
      
      [root@felicio ~]# perf report -D | grep PERF_RECORD_SAMPLE | cut -d/ -f2 | cut -d: -f1 | sort -n | uniq -c | sort -nr | nl
           1	   8444 26131
           2	   2584 26149
           3	   2518 26148
           4	   2324 26150
           5	    123 26143
           6	      9 661
           7	      9 29048
      [root@felicio ~]#
      
      This machine has two cores, so fewer threads appeared on the radar, and:
      
      [root@felicio ~]# grep perf_event /proc/`pidof perf`/maps | nl
       1 7f484b922000-7f484b9a3000 rwxs 00000000 00:09 4064 anon_inode:[perf_event]
      [root@felicio ~]#
      
      Just one mmap, as now we can use just one per-cpu buffer instead of the
      per-thread needed in the previous case.
      
      For global profiling:
      
      [root@felicio ~]# perf record -F 50000 -a
      ^C[ perf record: Woken up 26 times to write data ]
      [ perf record: Captured and wrote 7.128 MB perf.data (~311412 samples) ]
      
      [root@felicio ~]# grep perf_event /proc/`pidof perf`/maps | nl
           1	7fb49b435000-7fb49b4b6000 rwxs 00000000 00:09 4064                       anon_inode:[perf_event]
           2	7fb49b4b6000-7fb49b537000 rwxs 00000000 00:09 4064                       anon_inode:[perf_event]
      [root@felicio ~]#
      
      It uses per-cpu buffers.
      
      For just one thread:
      
      [root@felicio ~]# perf record -F 50000 --tid 26148
      ^C[ perf record: Woken up 2 times to write data ]
      [ perf record: Captured and wrote 0.330 MB perf.data (~14426 samples) ]
      
      [root@felicio ~]# perf report -D | grep PERF_RECORD_SAMPLE | cut -d/ -f2 | cut -d: -f1 | sort -n | uniq -c | sort -nr | nl
           1	   9969 26148
      [root@felicio ~]#
      
      [root@felicio ~]# grep perf_event /proc/`pidof perf`/maps | nl
           1	7f286a51b000-7f286a59c000 rwxs 00000000 00:09 4064                       anon_inode:[perf_event]
      [root@felicio ~]#
      
      Tested-by: default avatarDavid Ahern <dsahern@gmail.com>
      Tested-by: default avatarLin Ming <ming.m.lin@intel.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Link: http://lkml.kernel.org/r/20110426204401.GB1746@ghostprotocols.net
      
      
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      aece948f
    • Arnaldo Carvalho de Melo's avatar
      perf tools: Honour the cpu list parameter when also monitoring a thread list · b9019418
      Arnaldo Carvalho de Melo authored
      The perf_evlist__create_maps was discarding the --cpu parameter when a
      --pid or --tid was specified, fix that.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Link: http://lkml.kernel.org/r/20110426204401.GB1746@ghostprotocols.net
      
      
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      b9019418
  10. 15 Apr, 2011 1 commit
  11. 10 Mar, 2011 1 commit
    • Arnaldo Carvalho de Melo's avatar
      perf session: Use evlist/evsel for managing perf.data attributes · a91e5431
      Arnaldo Carvalho de Melo authored
      
      
      So that we can reuse things like the id to attr lookup routine
      (perf_evlist__id2evsel) that uses a hash table instead of the linear
      lookup done in the older perf_header_attr routines, etc.
      
      Also to make evsels/evlist more pervasive an API, simplyfing using the
      emerging perf lib.
      
      cc: Arun Sharma <arun@sharma-home.net>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      a91e5431
  12. 06 Mar, 2011 1 commit
    • Arnaldo Carvalho de Melo's avatar
      perf evlist: Split perf_evlist__id_hash · 3d3b5e95
      Arnaldo Carvalho de Melo authored
      
      
      The previous situation was to receive an fd from where to read the event
      ID.
      
      Spin off a routine for when we have the ID handy, not having to read it
      from some fd.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      3d3b5e95
  13. 02 Mar, 2011 1 commit
    • Frederic Weisbecker's avatar
      perf: Set filters before mmaping events · 0a102479
      Frederic Weisbecker authored
      
      
      We currently set the filters after we mmap the events, this is a
      race that let undesired events record themselves in the buffer before
      we had the time to set the filters.
      
      So set the filters before they can be recorded. That also librarizes
      the filters setting so that filtering can be done more easily
      from other tools than perf record later.
      
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      0a102479
  14. 31 Jan, 2011 1 commit
    • Arnaldo Carvalho de Melo's avatar
      perf evlist: Store pointer to the cpu and thread maps · 7e2ed097
      Arnaldo Carvalho de Melo authored
      
      
      So that we don't have to pass it around to the several methods that
      needs it, simplifying usage.
      
      There is one case where we don't have the thread/cpu map in advance,
      which is in the parsing routines used by top, stat, record, that we have
      to wait till all options are parsed to know if a cpu or thread list was
      passed to then create those maps.
      
      For that case consolidate the cpu and thread map creation via
      perf_evlist__create_maps() out of the code in top and record, while also
      providing a perf_evlist__set_maps() for cases where multiple evlists
      share maps or for when maps that represent CPU sockets, for instance,
      get crafted out of topology information or subsets of threads in a
      particular application are to be monitored, providing more granularity
      in specifying which cpus and threads to monitor.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      7e2ed097
  15. 30 Jan, 2011 1 commit
    • Arnaldo Carvalho de Melo's avatar
      perf evlist: Move evlist methods to evlist.c · f8a95309
      Arnaldo Carvalho de Melo authored
      
      
      They were on evsel.c because they came from refactoring existing evsel
      methods, so, to make reviewing the changes easier, I kept it there, now
      its a plain move.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      f8a95309
  16. 29 Jan, 2011 2 commits
    • Arnaldo Carvalho de Melo's avatar
      perf tools: Kill event_t typedef, use 'union perf_event' instead · 8115d60c
      Arnaldo Carvalho de Melo authored
      
      
      And move the event_t methods to the perf_event__ too.
      
      No code changes, just namespace consistency.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      8115d60c
    • Arnaldo Carvalho de Melo's avatar
      perf evlist: Support non overwrite mode in perf_evlist__read_on_cpu · 7bb41152
      Arnaldo Carvalho de Melo authored
      
      
      I.e. stash the overwrite mode in struct perf_evlist and act accordingly
      in perf_evlist__read_on_cpu, not checking for overwrites and touching
      the tail after consuming one event, like perf record does, for instance.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      7bb41152
  17. 24 Jan, 2011 1 commit
    • Arnaldo Carvalho de Melo's avatar
      perf evsel: Introduce perf_evsel__{in,ex}it · ef1d1af2
      Arnaldo Carvalho de Melo authored
      
      
      Out of the {con,des}structor, as in interpreted language bindings we will
      need to go back from the wrapper object to the real thing. In that case
      using container_of will save us to have an extra pointer in the perf_evsel
      struct.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      ef1d1af2
  18. 22 Jan, 2011 5 commits
    • Arnaldo Carvalho de Melo's avatar
      perf evlist: Steal mmap reading routine from 'perf top' · 04391deb
      Arnaldo Carvalho de Melo authored
      
      
      Will be used in the upcoming 'perf test' entry for the evlist mmap
      routines.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      04391deb
    • Arnaldo Carvalho de Melo's avatar
      perf evlist: Move the mmap array from perf_evsel · 70db7533
      Arnaldo Carvalho de Melo authored
      
      
      Adopting the new model used in 'perf record', where we don't have a map
      per thread per cpu, instead we have an mmap per cpu, established on the
      first fd for that cpu and ask the kernel using the
      PERF_EVENT_IOC_SET_OUTPUT ioctl to send events for the other fds on that
      cpu for the one with the mmap.
      
      The methods moved from perf_evsel to perf_evlist, but for easing review
      they were modified in place, in evsel.c, the next patch will move the
      migrated methods to evlist.c.
      
      With this 'perf top' now uses the same mmap model used by 'perf record'
      and the next patches will make 'perf record' use these new routines,
      establishing a common codebase for both tools.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      70db7533
    • Arnaldo Carvalho de Melo's avatar
      perf evsel: Introduce mmap support · 70082dd9
      Arnaldo Carvalho de Melo authored
      
      
      Out of the code in 'perf top'. Record is next in line.
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      70082dd9
    • Arnaldo Carvalho de Melo's avatar
      perf evlist: Adopt the pollfd array · 5c581041
      Arnaldo Carvalho de Melo authored
      
      
      Allocating just the space needed for nr_cpus * nr_threads * nr_evsels,
      not the MAX_NR_CPUS and counters.
      
      LKML-Reference: <new-submission>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      5c581041
    • Arnaldo Carvalho de Melo's avatar
      perf evsel: Introduce perf_evlist · 361c99a6
      Arnaldo Carvalho de Melo authored
      
      
      Killing two more perf wide global variables: nr_counters and evsel_list
      as a list_head.
      
      There are more operations that will need more fields in perf_evlist,
      like the pollfd for polling all the fds in a list of evsel instances.
      
      Use option->value to pass the evsel_list to parse_{events,filters}.
      
      LKML-Reference: <new-submission>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      361c99a6