1. 12 Aug, 2009 6 commits
    • Ingo Molnar's avatar
      perf_counter, x86: Fix/improve apic fallback · 04da8a43
      Ingo Molnar authored
      Johannes Stezenbach reported that his Pentium-M based
      laptop does not have the local APIC enabled by default,
      and hence perfcounters do not get initialized.
      
      Add a fallback for this case: allow non-sampled counters
      and return with an error on sampled counters. This allows
      'perf stat' to work out of box - and allows 'perf top'
      and 'perf record' to fall back on a hrtimer based sampling
      method.
      
      ( Passing 'lapic' on the boot line will allow hardware
        sampling to occur - but if the APIC is disabled
        permanently by the hardware then this fallback still
        allows more systems to use perfcounters. )
      
      Also decouple perfcounter support from X86_LOCAL_APIC.
      
      -v2: fix typo breaking counters on all other systems ...
      Reported-by: default avatarJohannes Stezenbach <js@sig21.net>
      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: default avatarIngo Molnar <mingo@elte.hu>
      04da8a43
    • Jens Axboe's avatar
      perf record: Add missing -C option support for specifying profile cpu · 0a5ac846
      Jens Axboe authored
      perf top supports a -C for setting the profile CPU, but perf
      record does not. This adds the same option for perf record,
      allowing the user to specify a specific target profile CPU.
      Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.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>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <20090812091801.GC12579@kernel.dk>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      0a5ac846
    • Arnaldo Carvalho de Melo's avatar
      perf tools: Fix dso__new handle() to handle deleted DSOs · 1340e6bb
      Arnaldo Carvalho de Melo authored
      It is better than showing the map addr, this way at least we
      know that we can't get the symtabs because the DSO was deleted
      (system update) while an app still used such DSO.
      
      Yeah, don't do that, but if you do, you'll figure it out
      quicker this way.
      
      [acme@doppio linux-2.6-tip]$ perf report | head -15
       # Samples: 3796
       #
       # Overhead  Command                                                        Shared Object  Symbol
       # ........  .......  ...................................................................  ......
       #
          23.55%   pidgin  /lib64/libglib-2.0.so.0.2000.4.#prelink#.Pd98lu (deleted)            [.] 0x00000000038844
          21.55%   pidgin  /lib64/libpthread-2.10.1.so.#prelink#.AFwK8Q (deleted)               [.] 0x0000000000a42d
          10.85%   pidgin  [kernel]                                                             [.] vread_hpet
           7.85%   pidgin  /lib64/libgobject-2.0.so.0.2000.4.#prelink#.o1vpU7 (deleted)         [.] 0x00000000014de8
           3.35%   pidgin  /lib64/libc-2.10.1.so (deleted)                                      [.] 0x0000000007a875
           3.19%   pidgin  /lib64/libdbus-1.so.3.4.0.#prelink#.6mwgZP (deleted)                 [.] 0x0000000001d254
           3.06%   pidgin  /usr/lib64/libgtk-x11-2.0.so.0.1600.5.#prelink#.511hAl (deleted)     [.] 0x000000002334e7
           2.90%   pidgin  /usr/lib64/libgdk-x11-2.0.so.0.1600.5.#prelink#.5qlMo1 (deleted)     [.] 0x00000000037b2d
           1.84%   pidgin  [kernel]                                                             [k] do_sys_poll
           1.45%   pidgin  /usr/lib64/libX11.so.6.2.0.#prelink#.iR59Rx (deleted)                [.] 0x0000000004c751
      [acme@doppio linux-2.6-tip]$
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Luis Claudio R. Gonçalves <lclaudio@redhat.com>
      Cc: Clark Williams <williams@redhat.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <20090811200436.GA3478@ghostprotocols.net>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      1340e6bb
    • Arnaldo Carvalho de Melo's avatar
      perf tools: Fix fallback to cplus_demangle() when bfd_demangle() is not available · 247648e3
      Arnaldo Carvalho de Melo authored
      In old binutils we can't access bfd_demangle(), use
      cplus_demangle() just like oprofile.
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Luis Claudio R. Gonçalves <lclaudio@redhat.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <20090811192211.GG18061@ghostprotocols.net>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      247648e3
    • Arnaldo Carvalho de Melo's avatar
      perf report: Show the tid too in -D · 94a24752
      Arnaldo Carvalho de Melo authored
      This made it easier to find the firefox threading related
      bug.
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <20090811192138.GE18061@ghostprotocols.net>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      94a24752
    • Arnaldo Carvalho de Melo's avatar
      perf record: Fix .tid and .pid fill-in when synthesizing events · 2a8083f0
      Arnaldo Carvalho de Melo authored
      Noticed when trying to record events for a firefox thread. We
      were synthesizing both .tid and .pid with the pid passed via
      --pid.
      
      Fix it by reading /proc/PID/status and getting the tgid
      to use in .pid, .tid gets the specified "pid".
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mike Galbraith <efault@gmx.de>
      LKML-Reference: <20090811192200.GF18061@ghostprotocols.net>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      2a8083f0
  2. 11 Aug, 2009 2 commits
    • Ingo Molnar's avatar
      perf_counter, x86: Fix generic cache events on P6-mobile CPUs · f64ccccb
      Ingo Molnar authored
      Johannes Stezenbach reported that 'perf stat' does not count
      cache-miss and cache-references events on his Pentium-M based
      laptop.
      
      This is because we left them blank in p6_perfmon_event_map[],
      fill them in.
      Reported-by: default avatarJohannes Stezenbach <js@sig21.net>
      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: default avatarIngo Molnar <mingo@elte.hu>
      f64ccccb
    • Ingo Molnar's avatar
      perf_counter, x86: Fix lapic printk message · 3c581a7f
      Ingo Molnar authored
      Instead of this garbled bootup on UP Pentium-M systems:
      
      [    0.015048] Performance Counters:
      [    0.016004] no Local APIC, try rebooting with lapicno PMU driver, software counters only.
      
      Print:
      
      [    0.015050] Performance Counters:
      [    0.016004] no APIC, boot with the "lapic" boot parameter to force-enable it.
      [    0.017003] no PMU driver, software counters only.
      
      Cf: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      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: default avatarIngo Molnar <mingo@elte.hu>
      3c581a7f
  3. 10 Aug, 2009 19 commits
  4. 09 Aug, 2009 13 commits