1. 19 Nov, 2014 7 commits
  2. 16 Nov, 2014 14 commits
  3. 12 Nov, 2014 1 commit
  4. 07 Nov, 2014 1 commit
  5. 06 Nov, 2014 4 commits
  6. 05 Nov, 2014 6 commits
    • Namhyung Kim's avatar
      perf tools: Make vmlinux short name more like kallsyms short name · 96d78059
      Namhyung Kim authored
      The previous patch changed kernel dso name from '[kernel.kallsyms]' to
      vmlinux.  However it might add confusion to old users accustomed to the
      old name.  So change the short name to '[kernel.vmlinux]' to reduce such
      confusion.
      
      Before:
        # Overhead  Command         Shared Object            Symbol
        # ........  ..............  .......................  ...............................
        #
             9.83%  swapper         vmlinux                  [k] intel_idle
             4.10%  awk             libc-2.20.so             [.] __strcmp_sse2
             1.86%  sed             libc-2.20.so             [.] __strcmp_sse2
             1.78%  netctl-auto     libc-2.20.so             [.] __strcmp_sse2
             1.23%  netctl-auto     libc-2.20.so             [.] __mbrtowc
             1.21%  firefox         libxul.so                [.] 0x00000000024b62bd
             1.20%  swapper         vmlinux                  [k] cpuidle_enter_state
             1.03%  sleep           vmlinux                  [k] copy_user_generic_unrolled
      
      After:
        # Overhead  Command         Shared Object            Symbol
        # ........  ..............  .......................  ...............................
        #
             9.83%  swapper         [kernel.vmlinux]         [k] intel_idle
             4.10%  awk             libc-2.20.so             [.] __strcmp_sse2
             1.86%  sed             libc-2.20.so             [.] __strcmp_sse2
             1.78%  netctl-auto     libc-2.20.so             [.] __strcmp_sse2
             1.23%  netctl-auto     libc-2.20.so             [.] __mbrtowc
             1.21%  firefox         libxul.so                [.] 0x00000000024b62bd
             1.20%  swapper         [kernel.vmlinux]         [k] cpuidle_enter_state
             1.03%  sleep           [kernel.vmlinux]         [k] copy_user_generic_unrolled
      Signed-off-by: default avatarNamhyung 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: 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/1415063674-17206-9-git-send-email-namhyung@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      96d78059
    • Namhyung Kim's avatar
      perf tools: Fix build-id matching on vmlinux · b837a8bd
      Namhyung Kim authored
      There's a problem on finding correct kernel symbols when perf report
      runs on a different kernel.  Although a part of the problem was solved
      by the prior commit 0a7e6d1b ("perf tools: Check recorded kernel
      version when finding vmlinux"), there's a remaining problem still.
      
      When perf records samples, it synthesizes the kernel map using
      machine__mmap_name() and ref_reloc_sym like "[kernel.kallsyms]_text".
      You can easily see it using 'perf report -D' command.
      
      After finishing record, it goes through the recorded events to find
      maps/dsos actually used.  And then record build-id info of them.
      
      During this process, it needs to load symbols in a dso and it'd call
      dso__load_vmlinux_path() since the default value of the symbol_conf.
      try_vmlinux_path is true.  However it changes dso->long_name to a real
      path of the vmlinux file (e.g. /lib/modules/3.16.4/build/vmlinux) if one
      is running on a custom kernel.
      
      It resulted in that perf report reads the build-id of the vmlinux, but
      cannot use it since it only knows about the [kernel.kallsyms] map.  It
      then falls back to possible vmlinux paths by using the recorded kernel
      version (in case of a recent version) or a running kernel silently.
      
      Even with the recent tools, this still has a possibility of breaking
      the result.  As the build directory is a symbolic link, if one built a
      new kernel in the same directory with different source/config, the old
      link to vmlinux will point the new file.  So it's absolutely needed to
      use build-id when finding a kernel image.
      
      In this patch, it's now changed to try to search a kernel dso in the
      existing dso list which was constructed during build-id table parsing
      so it'll always have a build-id.  If not found, search "[kernel.kallsyms]".
      
      Before:
      
        $ perf report
        # Children      Self  Command  Shared Object      Symbol
        # ........  ........  .......  .................  ...............................
        #
            72.15%     0.00%  swapper  [kernel.kallsyms]  [k] set_curr_task_rt
            72.15%     0.00%  swapper  [kernel.kallsyms]  [k] native_calibrate_tsc
            72.15%     0.00%  swapper  [kernel.kallsyms]  [k] tsc_refine_calibration_work
            71.87%    71.87%  swapper  [kernel.kallsyms]  [k] module_finalize
         ...
      
      After (for the same perf.data):
      
            72.15%     0.00%  swapper  vmlinux  [k] cpu_startup_entry
            72.15%     0.00%  swapper  vmlinux  [k] arch_cpu_idle
            72.15%     0.00%  swapper  vmlinux  [k] default_idle
            71.87%    71.87%  swapper  vmlinux  [k] native_safe_halt
         ...
      Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
      Acked-by: default avatarIngo Molnar <mingo@kernel.org>
      Link: http://lkml.kernel.org/r/20140924073356.GB1962@gmail.com
      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: 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/1415063674-17206-8-git-send-email-namhyung@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      b837a8bd
    • Namhyung Kim's avatar
      perf record: Do not save pathname in ./debug/.build-id directory for vmlinux · 00dc8657
      Namhyung Kim authored
      When perf record finishes a session, it pre-processes samples in order
      to write build-id info from DSOs that had samples.
      
      During this process it'll call map__load() for the kernel map, and it
      ends up calling dso__load_vmlinux_path() which replaces dso->long_name.
      
      But this function checks kernel's build-id before searching vmlinux path
      so it'll end up with a cryptic name, the pathname for the entry in the
      ~/.debug cache, which can be confusing to users.
      
      This patch adds a flag to skip the build-id check during record, so
      that it'll have the original vmlinux path for the kernel dso->long_name,
      not the entry in the ~/.debug cache.
      
      Before:
        # perf record -va sleep 3
        mmap size 528384B
        [ perf record: Woken up 1 times to write data ]
        [ perf record: Captured and wrote 0.196 MB perf.data (~8545 samples) ]
        Looking at the vmlinux_path (7 entries long)
        Using /home/namhyung/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 for symbols
      
      After:
        # perf record -va sleep 3
        mmap size 528384B
        [ perf record: Woken up 1 times to write data ]
        [ perf record: Captured and wrote 0.193 MB perf.data (~8432 samples) ]
        Looking at the vmlinux_path (7 entries long)
        Using /lib/modules/3.16.4-1-ARCH/build/vmlinux for symbols
      Signed-off-by: default avatarNamhyung 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: 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/1415063674-17206-7-git-send-email-namhyung@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      00dc8657
    • Namhyung Kim's avatar
      perf build-id: Move build-id related functions to util/build-id.c · e195fac8
      Namhyung Kim authored
      It'd be better managing those functions in a separate place as
      util/header.c file is already big.
      
      It now exports following 3 functions to others:
      
        bool perf_session__read_build_ids(struct perf_session *session, bool with_hits);
        int perf_session__write_buildid_table(struct perf_session *session, int fd);
        int perf_session__cache_build_ids(struct perf_session *session);
      Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
      Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
      Link: http://lkml.kernel.org/r/545733E7.6010105@intel.com
      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: 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/1415063674-17206-5-git-send-email-namhyung@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      e195fac8
    • Namhyung Kim's avatar
      perf build-id: Rename dsos__write_buildid_table() · 714c9c4a
      Namhyung Kim authored
      The dsos__write_buildid_table() is not use struct dso and it mostly
      uses perf_session struct.
      
      So rename it to perf_session__write_buildid_ table() so that it
      corresponds to other related functions such as
      perf_session__read_build_ids() and perf_session__cache_build_ids().
      Signed-off-by: default avatarNamhyung 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: 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/1415063674-17206-4-git-send-email-namhyung@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      714c9c4a
    • Namhyung Kim's avatar
      perf tools: Add gzip decompression support for kernel module · e92ce12e
      Namhyung Kim authored
      Now my Archlinux box shows module symbols correctly.
      
      Before:
        $ perf report --stdio
        Failed to open /tmp/perf-3477.map, continuing without symbols
        no symbols found in /usr/bin/date, maybe install a debug package?
        No kallsyms or vmlinux with build-id 7b4ea0a49ae2111925857099aaf05c3246ff33e0 was found
        [drm] with build id 7b4ea0a49ae2111925857099aaf05c3246ff33e0 not found, continuing without symbols
        No kallsyms or vmlinux with build-id edd931629094b660ca9dec09a1b635c8d87aa2ee was found
        [jbd2] with build id edd931629094b660ca9dec09a1b635c8d87aa2ee not found, continuing without symbols
        No kallsyms or vmlinux with build-id a7b1eada671c34933e5610bb920b2ca4945a82c3 was found
        [ext4] with build id a7b1eada671c34933e5610bb920b2ca4945a82c3 not found, continuing without symbols
        No kallsyms or vmlinux with build-id d69511fa3e5840e770336ef45b06c83fef8d74e3 was found
        [scsi_mod] with build id d69511fa3e5840e770336ef45b06c83fef8d74e3 not found, continuing without symbols
        No kallsyms or vmlinux with build-id af0430af13461af058770ee9b87afc07922c2e77 was found
        [libata] with build id af0430af13461af058770ee9b87afc07922c2e77 not found, continuing without symbols
        No kallsyms or vmlinux with build-id aaeedff8160ce631a5f0333591c6ff291201d29f was found
        [libahci] with build id aaeedff8160ce631a5f0333591c6ff291201d29f not found, continuing without symbols
        No kallsyms or vmlinux with build-id c57907712becaf662dc4981824bb372c0441d605 was found
        [mac80211] with build id c57907712becaf662dc4981824bb372c0441d605 not found, continuing without symbols
        No kallsyms or vmlinux with build-id e0589077cc0ec8c3e4c40eb9f2d9e69d236bee8f was found
        [iwldvm] with build id e0589077cc0ec8c3e4c40eb9f2d9e69d236bee8f not found, continuing without symbols
        No kallsyms or vmlinux with build-id 2d86086bf136bf374a2f029cf85a48194f9b950b was found
        [cfg80211] with build id 2d86086bf136bf374a2f029cf85a48194f9b950b not found, continuing without symbols
        No kallsyms or vmlinux with build-id 4493c48599bdb3d91d0f8db5150e0be33fdd9221 was found
        [iwlwifi] with build id 4493c48599bdb3d91d0f8db5150e0be33fdd9221 not found, continuing without symbols
        ...
        #
        # Overhead  Command          Shared Object            Symbol
        # ........  ...............  .......................  ........................................................
        #
             0.03%  swapper          [ext4]                   [k] 0x000000000000fe2e
             0.03%  swapper          [kernel.kallsyms]        [k] account_entity_enqueue
             0.03%  swapper          [ext4]                   [k] 0x000000000000fc2b
             0.03%  irq/50-iwlwifi   [iwlwifi]                [k] 0x000000000000200b
             0.03%  swapper          [kernel.kallsyms]        [k] ktime_add_safe
             0.03%  swapper          [kernel.kallsyms]        [k] elv_completed_request
             0.03%  swapper          [libata]                 [k] 0x0000000000003997
             0.03%  swapper          [libahci]                [k] 0x0000000000001f25
             0.03%  swapper          [kernel.kallsyms]        [k] rb_next
             0.03%  swapper          [kernel.kallsyms]        [k] blk_finish_request
             0.03%  swapper          [ext4]                   [k] 0x0000000000010248
             0.00%  perf             [kernel.kallsyms]        [k] native_write_msr_safe
      
      After:
        $ perf report --stdio
        Failed to open /tmp/perf-3477.map, continuing without symbols
        no symbols found in /usr/bin/tr, maybe install a debug package?
        ...
        #
        # Overhead  Command          Shared Object                Symbol
        # ........  ...............  ...........................  ......................................................
        #
      
             0.04%  kworker/u16:3    [ext4]                       [k] ext4_read_block_bitmap
             0.03%  kworker/u16:0    [mac80211]                   [k] ieee80211_sta_reset_beacon_monitor
             0.02%  irq/50-iwlwifi   [mac80211]                   [k] ieee80211_get_bssid
             0.02%  firefox          [e1000e]                     [k] __ew32_prepare
             0.02%  swapper          [libahci]                    [k] ahci_handle_port_interrupt
             0.02%  emacs            libglib-2.0.so.0.4000.0      [.] g_mutex_unlock
             0.02%  swapper          [e1000e]                     [k] e1000_clean_tx_irq
             0.02%  dwm              [kernel.kallsyms]            [k] __schedule
             0.02%  gnome-terminal-  [vdso]                       [.] __vdso_clock_gettime
             0.02%  swapper          [e1000e]                     [k] e1000_alloc_rx_buffers
             0.02%  irq/50-iwlwifi   [mac80211]                   [k] ieee80211_rx
             0.01%  firefox          [vdso]                       [.] __vdso_gettimeofday
             0.01%  irq/50-iwlwifi   [iwlwifi]                    [k] iwl_pcie_rxq_restock.part.13
      Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
      Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Namhyung Kim <namhyung.kim@lge.com>
      Cc: Adrian Hunter <adrian.hunter@intel.com>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: Stephane Eranian <eranian@google.com>
      Link: http://lkml.kernel.org/r/87h9yexshi.fsf@sejong.aot.lge.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      e92ce12e
  7. 04 Nov, 2014 4 commits
  8. 03 Nov, 2014 3 commits
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client · ce1928da
      Linus Torvalds authored
      Pull ceph fixes from Sage Weil:
       "There is a GFP flag fix from Mike Christie, an error code fix from
        Jan, and fixes for two unnecessary allocations (kmalloc and workqueue)
        from Ilya.  All are well tested.
      
        Ilya has one other fix on the way but it didn't get tested in time"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
        libceph: eliminate unnecessary allocation in process_one_ticket()
        rbd: Fix error recovery in rbd_obj_read_sync()
        libceph: use memalloc flags for net IO
        rbd: use a single workqueue for all devices
      ce1928da
    • Linus Torvalds's avatar
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k · f4ca536f
      Linus Torvalds authored
      Pull m68k update from Geert Uytterhoeven.
      
      Just wiring up the bpf system call.
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
        m68k: Wire up bpf
      f4ca536f
    • Linus Torvalds's avatar
      Merge tag 'armsoc-for-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc · 2084becb
      Linus Torvalds authored
      Pull ARM SoC fixes from Olof Johansson:
       "A surprisingly small batch of fixes for -rc3.  Suspiciously small, I'd
        say.
      
        Anyway, most of this are a few defconfig updates.  Some for omap to
        deal with kernel binary size (moving ipv6 to module, etc).  A larger
        one for socfpga that refreshes with some churn, but also turns on a
        few options that makes the newly-added board in my bootfarm usable for
        testing.
      
        OMAP3 will also now warn when booted with legacy (non-DT) boot
        protocols, hopefully encouraging those who still care about some of
        those platforms to submit DT support and report bugs where needed.
        Nothing stops working though, this is just to warn for future
        deprecation.
      
        Beyond this, very few actual bugfixes.  A PXA fix for DEBUG_LL boot
        hangs, a missing terminting entry in a dt_match array on RealView a
        MTD fix on OMAP with NAND"
      
      [ Obviously missed rc3, will make rc4 instead ;) ]
      
      * tag 'armsoc-for-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
        MAINTAINERS: drop list entry for davinci
        ARM: OMAP2+: Warn about deprecated legacy booting mode
        ARM: omap2plus_defconfig: Fix errors with NAND BCH
        ARM: multi_v7_defconfig: fix support for APQ8084
        soc: versatile: Add terminating entry for realview_soc_of_match
        ARM: ixp4xx: remove compilation warnings in io.h
        MAINTAINERS: Add Soren as reviewer for Zynq
        ARM: omap2plus_defconfig: Fix bloat caused by having ipv6 built-in
        ARM: socfpga_defconfig: Update defconfig for SoCFPGA
        ARM: pxa: fix hang on startup with DEBUG_LL
      2084becb