1. 31 1月, 2010 4 次提交
    • H
      perf lock: Enhance information of lock trace events · c965be10
      Hitoshi Mitake 提交于
      Add wait time and lock identification details.
      Signed-off-by: NHitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <1264851813-8413-11-git-send-email-mitake@dcl.info.waseda.ac.jp>
      [ removed the file/line bits as we can do that better via IPs ]
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      c965be10
    • H
      perf: Add util/include/linuxhash.h to include hash.h of kernel · 18e97e06
      Hitoshi Mitake 提交于
      linux/hash.h, hash header of kernel, is also useful for perf.
      
      util/include/linuxhash.h includes linux/hash.h, so we can use
      hash facilities (e.g. hash_long()) in perf now.
      Signed-off-by: NHitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <1264851813-8413-3-git-send-email-mitake@dcl.info.waseda.ac.jp>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      18e97e06
    • H
      perf tools: Add __data_loc support · 86d8d296
      Hitoshi Mitake 提交于
      This patch is required to test the next patch for perf lock.
      
      At 064739bc ,
      support for the modifier "__data_loc" of format is added.
      
      But, when I wanted to parse format of lock_acquired (or some
      event else), raw_field_ptr() did not returned correct pointer.
      
      So I modified raw_field_ptr() like this patch. Then
      raw_field_ptr() works well.
      Signed-off-by: NHitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
      Acked-by: NFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Steven Rostedt <srostedt@redhat.com>
      LKML-Reference: <1264851813-8413-2-git-send-email-mitake@dcl.info.waseda.ac.jp>
      [ v3: fixed minor stylistic detail ]
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      86d8d296
    • H
      Revert "perf record: Intercept all events" · a8e6f734
      Hitoshi Mitake 提交于
      This reverts commit f5a2c3dc.
      
      This patch is required for making "perf lock rec" work.
      The commit f5a2c3dc changes write_event() of builtin-record.c
      . And changed write_event() sometimes doesn't stop with perf
      lock rec.
      
      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>
      [ that commit also causes perf record to not be Ctrl-C-able,
        and it's concetually wrong to parse the data at record time
        (unconditionally - even when not needed), as we eventually
        want to be able to do zero-copy recording, at least for
        non-archive recordings.  ]
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      a8e6f734
  2. 29 1月, 2010 29 次提交
  3. 28 1月, 2010 2 次提交
    • A
      perf: Fix inconsistency between IP and callchain sampling · 339ce1a4
      Anton Blanchard 提交于
      When running perf across all cpus with backtracing (-a -g), sometimes we
      get samples without associated backtraces:
      
          23.44%         init  [kernel]                     [k] restore
          11.46%         init                       eeba0c  [k] 0x00000000eeba0c
           6.77%      swapper  [kernel]                     [k] .perf_ctx_adjust_freq
           5.73%         init  [kernel]                     [k] .__trace_hcall_entry
           4.69%         perf  libc-2.9.so                  [.] 0x0000000006bb8c
                             |
                             |--11.11%-- 0xfffa941bbbc
      
      It turns out the backtrace code has a check for the idle task and the IP
      sampling does not. This creates problems when profiling an interrupt
      heavy workload (in my case 10Gbit ethernet) since we get no backtraces
      for interrupts received while idle (ie most of the workload).
      
      Right now x86 and sh check that current is not NULL, which should never
      happen so remove that too.
      
      Idle task's exclusion must be performed from the core code, on top
      of perf_event_attr:exclude_idle.
      Signed-off-by: NAnton Blanchard <anton@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Paul Mundt <lethal@linux-sh.org>
      LKML-Reference: <20100118054707.GT12666@kryten>
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      339ce1a4
    • M
      hw_breakpoints: Release the bp slot if arch_validate_hwbkpt_settings() fails. · b23ff0e9
      Mahesh Salgaonkar 提交于
      On a given architecture, when hardware breakpoint registration fails
      due to un-supported access type (read/write/execute), we lose the bp
      slot since register_perf_hw_breakpoint() does not release the bp slot
      on failure.
      Hence, any subsequent hardware breakpoint registration starts failing
      with 'no space left on device' error.
      
      This patch introduces error handling in register_perf_hw_breakpoint()
      function and releases bp slot on error.
      Signed-off-by: NMahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
      Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
      Cc: K. Prasad <prasad@linux.vnet.ibm.com>
      Cc: Maneesh Soni <maneesh@in.ibm.com>
      LKML-Reference: <20100121125516.GA32521@in.ibm.com>
      Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
      b23ff0e9
  4. 27 1月, 2010 5 次提交