1. 22 6月, 2016 1 次提交
  2. 20 5月, 2016 1 次提交
  3. 23 3月, 2016 1 次提交
  4. 03 2月, 2016 1 次提交
  5. 07 1月, 2016 2 次提交
  6. 18 12月, 2015 1 次提交
  7. 11 12月, 2015 2 次提交
  8. 14 9月, 2015 1 次提交
  9. 25 8月, 2015 1 次提交
    • A
      perf annotate: Reset the dso find_symbol cache when removing symbols · c0b4dffb
      Arnaldo Carvalho de Melo 提交于
      The 'annotate' tool does some filtering in the entries in a DSO but
      forgot to reset the cache done in dso__find_symbol(), cauxing a SEGV:
      
        [root@zoo ~]# perf annotate netlink_poll
        perf: Segmentation fault
        -------- backtrace --------
        perf[0x526ceb]
        /lib64/libc.so.6(+0x34960)[0x7faedfbe0960]
        perf(rb_erase+0x223)[0x499d63]
        perf[0x4213e9]
        perf[0x4bc123]
        perf[0x4bc621]
        perf[0x4bf26b]
        perf[0x4bc855]
        perf(perf_session__process_events+0x340)[0x4bddc0]
        perf(cmd_annotate+0x6bb)[0x421b5b]
        perf[0x479063]
        perf(main+0x60a)[0x42098a]
        /lib64/libc.so.6(__libc_start_main+0xf0)[0x7faedfbcbfe0]
        perf[0x420aa9]
        [0x0]
        [root@zoo ~]#
      
      Fix it by reseting the find cache when removing symbols.
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Stephane Eranian <eranian@google.com>
      Fixes: b685ac22 ("perf symbols: Add front end cache for DSO symbol lookup")
      Link: http://lkml.kernel.org/n/tip-b2y9x46y0t8yem1ive41zqyp@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      c0b4dffb
  10. 13 8月, 2015 1 次提交
    • K
      perf callchain: Allow disabling call graphs per event · f9db0d0f
      Kan Liang 提交于
      This patch introduce "call-graph=no" to disable per-event callgraph.
      
      Here is an example.
      
        perf record -e 'cpu/cpu-cycles,call-graph=fp/,cpu/instructions,call-graph=no/' sleep 1
      
        perf report --stdio
      
        # To display the perf.data header info, please use
        --header/--header-only options.
        #
        #
        # Total Lost Samples: 0
        #
        # Samples: 6  of event 'cpu/cpu-cycles,call-graph=fp/'
        # Event count (approx.): 774218
        #
        # Children      Self  Command  Shared Object     Symbol
        # ........  ........  .......  ................  ........................................
        #
          61.94%     0.00%  sleep    [kernel.vmlinux]  [k] entry_SYSCALL_64_fastpath
                    |
                    ---entry_SYSCALL_64_fastpath
                       |
                       |--97.30%-- __brk
                       |
                        --2.70%-- mmap64
                                  _dl_check_map_versions
                                  _dl_check_all_versions
      
          61.94%     0.00%  sleep    [kernel.vmlinux]  [k] perf_event_mmap
                    |
                    ---perf_event_mmap
                       |
                       |--97.30%-- do_brk
                       |          sys_brk
                       |          entry_SYSCALL_64_fastpath
                       |          __brk
                       |
                        --2.70%-- mmap_region
                                  do_mmap_pgoff
                                  vm_mmap_pgoff
                                  sys_mmap_pgoff
                                  sys_mmap
                                  entry_SYSCALL_64_fastpath
                                  mmap64
                                  _dl_check_map_versions
                                  _dl_check_all_versions
        ......
      
        # Samples: 6  of event 'cpu/instructions,call-graph=no/'
        # Event count (approx.): 359692
        #
        # Children      Self  Command  Shared Object     Symbol
        # ........  ........  .......  ................  .................................
        #
           89.03%     0.00%  sleep    [unknown]         [.] 0xffff6598ffff6598
           89.03%     0.00%  sleep    ld-2.17.so        [.] _dl_resolve_conflicts
           89.03%     0.00%  sleep    [kernel.vmlinux]  [k] page_fault
      Signed-off-by: NKan Liang <kan.liang@intel.com>
      Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Link: http://lkml.kernel.org/r/1439289050-40510-2-git-send-email-kan.liang@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      f9db0d0f
  11. 07 8月, 2015 1 次提交
  12. 20 6月, 2015 1 次提交
  13. 29 5月, 2015 1 次提交
  14. 28 5月, 2015 1 次提交
  15. 09 5月, 2015 1 次提交
    • A
      perf machine: Protect the machine->threads with a rwlock · b91fc39f
      Arnaldo Carvalho de Melo 提交于
      In addition to using refcounts for the struct thread lifetime
      management, we need to protect access to machine->threads from
      concurrent access.
      
      That happens in 'perf top', where a thread processes events, inserting
      and deleting entries from that rb_tree while another thread decays
      hist_entries, that end up dropping references and ultimately deleting
      threads from the rb_tree and releasing its resources when no further
      hist_entry (or other data structures, like in 'perf sched') references
      it.
      
      So the rule is the same for refcounts + protected trees in the kernel,
      get the tree lock, find object, bump the refcount, drop the tree lock,
      return, use object, drop the refcount if no more use of it is needed,
      keep it if storing it in some other data structure, drop when releasing
      that data structure.
      
      I.e. pair "t = machine__find(new)_thread()" with a "thread__put(t)", and
      "perf_event__preprocess_sample(&al)" with "addr_location__put(&al)".
      
      The addr_location__put() one is because as we return references to
      several data structures, we may end up adding more reference counting
      for the other data structures and then we'll drop it at
      addr_location__put() time.
      Acked-by: NDavid Ahern <dsahern@gmail.com>
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: Don Zickus <dzickus@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lkml.kernel.org/n/tip-bs9rt4n0jw3hi9f3zxyy3xln@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      b91fc39f
  16. 11 3月, 2015 1 次提交
  17. 23 12月, 2014 1 次提交
  18. 15 10月, 2014 1 次提交
    • A
      perf tools: Remove hists from evsel · a635fc51
      Arnaldo Carvalho de Melo 提交于
      Now tools that deals want to have an hists per evsel need to call
      hists__init() before creating any evsels, which can be as early as when
      parsing the command line, so do it before calling parse_options().
      
      The current tools using hists/hist_entries are report, top and annotate,
      change them to request per evsel hists.
      
      This is in preparation for making evsels usable by 3rd party tools, that
      not necessarily live in perf's source code repository.
      Acked-by: NBorislav Petkov <bp@suse.de>
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Don Zickus <dzickus@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Jean Pihet <jean.pihet@linaro.org>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lkml.kernel.org/n/tip-usjx2la743f10ippj7p1b20x@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      a635fc51
  19. 14 10月, 2014 1 次提交
    • A
      perf session: Remove last reference to hists struct · 2a1731fb
      Arnaldo Carvalho de Melo 提交于
      Now perf_session doesn't require that the evsels in its evlist are hists
      containing ones.
      
      Tools that are hists based and want to do per evsel events_stats
      updates, if at some point this turns into a necessity, should do it in
      the tool specific code, keeping the session class hists agnostic.
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Don Zickus <dzickus@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Jean Pihet <jean.pihet@linaro.org>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lkml.kernel.org/n/tip-cli1bgwpo82mdikuhy3djsuy@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      2a1731fb
  20. 10 10月, 2014 1 次提交
    • A
      perf evsel: Add hists helper · 4ea062ed
      Arnaldo Carvalho de Melo 提交于
      Not all tools need a hists instance per perf_evsel, so lets pave the way
      to remove evsel->hists while leaving a way to access the hists from a
      specially allocated evsel, one that comes with space at the end where
      lives the evsel.
      
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: Borislav Petkov <bp@suse.de>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Don Zickus <dzickus@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Jean Pihet <jean.pihet@linaro.org>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lkml.kernel.org/n/tip-qlktkhe31w4mgtbd84035sr2@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      4ea062ed
  21. 26 9月, 2014 1 次提交
  22. 14 8月, 2014 2 次提交
    • N
      perf tools: Check recorded kernel version when finding vmlinux · 0a7e6d1b
      Namhyung Kim 提交于
      Currently vmlinux_path__init() only tries to find vmlinux file from
      current directory, /boot and some canonical directories with version
      number of the running kernel.  This can be a problem when reporting old
      data recorded on a kernel version not running currently.
      
      We can use --symfs option for this but it's annoying for user to do it
      always.  As we already have the info in the perf.data file, it can be
      changed to use it for the search automatically.
      
      Before:
      
        $ perf report
        ...
        # Samples: 4K of event 'cpu-clock'
        # Event count (approx.): 1067250000
        #
        # Overhead  Command     Shared Object      Symbol
        # ........  ..........  .................  ..............................
            71.87%     swapper  [kernel.kallsyms]  [k] recover_probed_instruction
      
      After:
      
        # Overhead  Command     Shared Object      Symbol
        # ........  ..........  .................  ....................
            71.87%     swapper  [kernel.kallsyms]  [k] native_safe_halt
      
      This requires to change signature of symbol__init() to receive struct
      perf_session_env *.
      Reported-by: NMinchan Kim <minchan@kernel.org>
      Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Minchan Kim <minchan@kernel.org>
      Cc: Namhyung Kim <namhyung.kim@lge.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lkml.kernel.org/r/1407825645-24586-14-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      0a7e6d1b
    • N
      perf annotate: Move session handling out of __cmd_annotate() · fa10f316
      Namhyung Kim 提交于
      This is a preparation of fixing dso__load_kernel_sym().  It needs a
      session info before calling symbol__init().
      Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
      Acked-by: NJiri Olsa <jolsa@kernel.org>
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Minchan Kim <minchan@kernel.org>
      Cc: Namhyung Kim <namhyung.kim@lge.com>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Link: http://lkml.kernel.org/r/1407825645-24586-4-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      fa10f316
  23. 12 8月, 2014 1 次提交
  24. 01 6月, 2014 2 次提交
  25. 24 4月, 2014 1 次提交
  26. 13 1月, 2014 1 次提交
  27. 28 12月, 2013 1 次提交
  28. 19 12月, 2013 1 次提交
  29. 10 12月, 2013 1 次提交
  30. 05 11月, 2013 1 次提交
  31. 24 10月, 2013 1 次提交
  32. 23 10月, 2013 1 次提交
  33. 22 10月, 2013 2 次提交
  34. 10 10月, 2013 1 次提交
  35. 04 10月, 2013 1 次提交