1. 25 8月, 2015 9 次提交
    • A
      perf tools: Add Intel PT support for using MTC packets · b45fc0bf
      Adrian Hunter 提交于
      MTC packets are a new Intel PT feature.
      
      MTC packets provide finer grain timestamp information than TSC packets.
      
      Support for this feature is indicated by:
      
        /sys/bus/event_source/devices/intel_pt/caps/mtc
      
      which contains "1" if the feature is supported and "0" otherwise.
      
      MTC packets can be requested using a PMU config term e.g. perf record -e
      intel_pt/mtc/u sleep 1
      
      The frequency of MTC packets can also be specified.  e.g. perf record -e
      intel_pt/mtc,mtc_period=2/u sleep 1
      
      The default value is 3 or the nearest lower value that is supported.  0
      is always supported.
      
      Valid values are given by:
      
      /sys/bus/event_source/devices/intel_pt/caps/mtc_periods
      
      which contains a hexadecimal value, the bits of which represent valid
      values e.g. bit 2 set means value 2 is valid.
      
      The value is converted to the MTC frequency as:
      
      	CTC-frequency / (2 ^ value)
      
      e.g. value 3 means one eighth of CTC-frequency
      
      Where CTC is the hardware crystal clock, the frequency of which can be
      related to TSC via values provided in cpuid leaf 0x15.
      
      If an invalid value is entered, the error message will give a list of
      valid values e.g.
      
      	$ perf record -e intel_pt/mtc_period=15/u uname
      	Invalid mtc_period for intel_pt. Valid values are: 0,3,6,9
      
      tools/perf/Documentation/intel-pt.txt is updated in a later patch as
      there are a number of new features being added.
      
      For more information refer to the June 2015 or later Intel 64 and IA-32
      Architectures SDM Chapter 36 Intel Processor Trace.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-22-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      b45fc0bf
    • A
      perf tools: Add Intel PT support for decoding MTC packets · 79b58424
      Adrian Hunter 提交于
      MTC packets provide finer grain timestamp information than TSC packets.
      MTC packets record time using the hardware crystal clock (CTC) which is
      related to TSC packets using a TMA packet.
      
      This patch just adds decoder support.
      
      Support for a default value and validation of values is provided by a
      later patch. Also documentation is updated in a separate patch.
      
      For details refer to the June 2015 or later Intel 64 and IA-32
      Architectures SDM Chapter 36 Intel Processor Trace.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-21-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      79b58424
    • A
      perf tools: Pass Intel PT information for decoding MTC and CYC · 11fa7cb8
      Adrian Hunter 提交于
      Record additional information in the AUXTRACE_INFO event in preparation
      for decoding MTC and CYC packets.  Pass the information to the decoder.
      
      The AUXTRACE_INFO record can be extended by using the size to indicate
      the presence of new members.
      
      The additional information includes PMU config bit positions and the TSC
      to CTC (hardware crystal clock) ratio needed to decode MTC packets.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-20-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      11fa7cb8
    • A
      perf tools: Add new Intel PT packet definitions · 3d498078
      Adrian Hunter 提交于
      New features have been added to Intel PT which include a number of new
      packet definitions.
      
      This patch adds packet definitions for new packets: TMA, MTC, CYC, VMCS,
      TRACESTOP and MNT.  Also another bit in PIP is defined.
      
      This patch only adds support for the definitions. Later patches add
      support for decoding TMA, MTC, CYC and TRACESTOP which is where those
      packets are explained.
      
      VMCS and the newly defined bit in PIP are used with virtualization which
      is not supported yet.  MNT is a maintenance packet which the decoder
      should ignore.
      
      For details, refer to the June 2015 or later Intel 64 and IA-32
      Architectures SDM Chapter 36 Intel Processor Trace.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-19-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      3d498078
    • A
      perf tools: Add Intel PT support for PSB periods · bc9b6bf0
      Adrian Hunter 提交于
      The PSB packet is a synchronization packet that provides a starting
      point for decoding or recovery from errors.
      
      This patch adds support for a new Intel PT feature that allows the
      frequency of PSB packets to be specified.
      
      Support for this feature is indicated by
      /sys/bus/event_source/devices/intel_pt/caps/psb_cyc which contains "1"
      if the feature is supported and "0" otherwise.
      
      The PSB period can be specified as a PMU config term e.g. perf record -e
      intel_pt/psb_period=2/u sleep 1
      
      The default value is 3 or the nearest lower value that is supported.  0
      is always supported.
      
      Valid values are given by:
      
      /sys/bus/event_source/devices/intel_pt/caps/psb_periods
      
      which contains a hexadecimal value, the bits of which represent valid
      values e.g. bit 2 set means value 2 is valid.
      
      The value is converted to the approximate number of trace bytes between
      PSB packets as:
      
      	2 ^ (value + 11)
      
      e.g. value 3 means 16KiB bytes between PSBs
      
      If an invalid value is entered, the error message will give a list of
      valid values e.g.
      
      	$ perf record -e intel_pt/psb_period=15/u uname
      	Invalid psb_period for intel_pt. Valid values are: 0-5
      
      tools/perf/Documentation/intel-pt.txt is updated in a later patch as
      there are a number of new features being added.
      
      For more information about PSB periods refer to the Intel 64 and IA-32
      Architectures SDM Chapter 36 Intel Processor Trace from June 2015 or
      later.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-18-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      bc9b6bf0
    • A
      perf tools: Fix Intel PT 'instructions' sample period · 2a21d036
      Adrian Hunter 提交于
      The period on synthesized 'instructions' samples was being set to a
      fixed value, whereas the correct value is the number of instructions
      since the last sample, which is a value that the decoder can provide.
      So do it that way.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-14-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      2a21d036
    • A
      perf ordered_events: Clear the progress bar at the end of a flush · 5c9ce1e6
      Arnaldo Carvalho de Melo 提交于
      We were depending on the next screen operation after a flush() being
      one that would redraw the whole screen so that the progress bar would
      be overwritten, when that didn't happen a screen artifact of, say, a
      error dialog window would be overlaid on top of the progress bar, fix
      it by calling ui_browser__finish(), that now has a TUI implementation.
      
      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>
      Link: http://lkml.kernel.org/n/tip-el0fyw6duemnx62lydjzhs8c@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      5c9ce1e6
    • A
      perf ui tui progress: Implement the ui_progress_ops->finish() method · 1e259ad4
      Arnaldo Carvalho de Melo 提交于
      So that we can erase the progress bar after we're done with it, avoiding
      things like:
      
      -------------------------------------------------------------------
      
                ┌─Error:──────────────────────────────────────────────────────┐
                │Can't annotate unmapped_area_topdown:                        │
                │                                                             │
                │No vmlinux file with build id a826726b5ddacfab1f0bade868f1a79│
                │was found in the path.                                       │
                │                                                             │
                │Note that annotation using /proc/kcore requires CAP_SYS_RAWIO│
      ┌Processin│                                                             │──┐
      │         │Please use:                                                  │  │
      └─────────│                                                             │──┘
                │  perf buildid-cache -vu vmlinux                             │
                │                                                             │
                │or:                                                          │
                │                                                             │
                │  --vmlinux vmlinux                                          │
                │                                                             │
                │                                                             │
                │Press any key...                                             │
                └─────────────────────────────────────────────────────────────┘
      
      Can't annotate unmapped_area_topdown:
      -------------------------------------------------------------------
      
      I.e. that finished progress bar behind the error window. It is not a
      problem when we end up redrawing the whole screen, but its ugly when
      we present such error windows, provide a TUI method so that code like
      the above may avoid this situation, as will be done with the annotation
      code in the next cset.
      
      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>
      Link: http://lkml.kernel.org/n/tip-qvktnojzwwe37pweging058t@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      1e259ad4
    • 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
  2. 22 8月, 2015 2 次提交
  3. 21 8月, 2015 10 次提交
    • W
      perf probe: Try to use symbol table if searching debug info failed · 1c0bd0e8
      Wang Nan 提交于
      A problem can occur in a statically linked perf when vmlinux can be found:
      
       # perf probe --add sys_epoll_pwait
       probe-definition(0): sys_epoll_pwait
       symbol:sys_epoll_pwait file:(null) line:0 offset:0 return:0 lazy:(null)
       0 arguments
       Looking at the vmlinux_path (7 entries long)
       Using /lib/modules/4.2.0-rc1+/build/vmlinux for symbols
       Open Debuginfo file: /lib/modules/4.2.0-rc1+/build/vmlinux
       Try to find probe point from debuginfo.
       Symbol sys_epoll_pwait address found : ffffffff8122bd40
       Matched function: SyS_epoll_pwait
       Failed to get call frame on 0xffffffff8122bd40
       An error occurred in debuginfo analysis (-2).
         Error: Failed to add events. Reason: No such file or directory (Code: -2)
      
      The reason is caused by libdw that, if libdw is statically linked, it
      can't load libebl_{arch}.so reliable.
      
      In this case it is still possible to get the address from
      /proc/kalksyms.  However, perf tries that only when libdw returns
      -EBADF.
      
      This patch gives it another chance to utilize symbol table, even if
      libdw returns an error code other than -EBADF.
      
      After applying this patch:
      
       # perf probe -nv --add sys_epoll_pwait
       probe-definition(0): sys_epoll_pwait
       symbol:sys_epoll_pwait file:(null) line:0 offset:0 return:0 lazy:(null)
       0 arguments
       Looking at the vmlinux_path (7 entries long)
       Using /lib/modules/4.2.0-rc1+/build/vmlinux for symbols
       Open Debuginfo file: /lib/modules/4.2.0-rc1+/build/vmlinux
       Try to find probe point from debuginfo.
       Symbol sys_epoll_pwait address found : ffffffff8122bd40
       Matched function: SyS_epoll_pwait
       Failed to get call frame on 0xffffffff8122bd40
       An error occurred in debuginfo analysis (-2).
       Trying to use symbols.
       Opening /sys/kernel/debug/tracing/kprobe_events write=1
       Added new event:
       Writing event: p:probe/sys_epoll_pwait _text+2276672
         probe:sys_epoll_pwait (on sys_epoll_pwait)
      
       You can now use it in all perf tools, such as:
      
       	perf record -e probe:sys_epoll_pwait -aR sleep 1
      
      Although libdw returns an error (Failed to get call frame), perf tries
      symbol table and finally gets correct address.
      Signed-off-by: NWang Nan <wangnan0@huawei.com>
      Cc: Alexei Starovoitov <ast@plumgrid.com>
      Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
      Cc: Daniel Borkmann <daniel@iogearbox.net>
      Cc: David Ahern <dsahern@gmail.com>
      Cc: He Kuang <hekuang@huawei.com>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Kaixu Xia <xiakaixu@huawei.com>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Namhyung Kim <namhyung@kernel.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Zefan Li <lizefan@huawei.com>
      Cc: pi3orama@163.com
      Link: http://lkml.kernel.org/r/1440151770-129878-2-git-send-email-wangnan0@huawei.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      1c0bd0e8
    • A
      perf tools: Initialize reference counts in map__clone() · 66671d00
      Arnaldo Carvalho de Melo 提交于
      Map clone was written before we introduced reference counts for
      maps and dsos, so all that was needed was just a copy and then we
      would insert it into the new map_groups instance.
      
      Fix it by, after copying, initializing the map->refcnt, grabbing
      a struct dso refcount and resetting pointers that may be used
      to determine if a map, when deleted, is in a rb_tree.
      
      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>
      Link: http://lkml.kernel.org/n/tip-pd4mr80o5b9gvk50iineacec@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      66671d00
    • A
      perf tools: Add example call-graph script · 4b715d24
      Adrian Hunter 提交于
      Add a script to produce a call-graph from data exported to a postgresql
      database and derived from a processor trace event like intel_pt or intel_bts.
      
      Refer to comments in the scripts call-graph-from-postgresql.py and
      export-to-postgresql.py for more details on how to set up the environment,
      install the required packages, etc.
      
      Committer note:
      
      From the scripts, for convenience while reading 'git log':
      
        An example of using this script with Intel PT:
      
        $ perf record -e intel_pt//u ls
        $ perf script -s ~/libexec/perf-core/scripts/python/export-to-postgresql.py pt_example branches calls
        2015-05-29 12:49:23.464364 Creating database...
        2015-05-29 12:49:26.281717 Writing to intermediate files...
        2015-05-29 12:49:27.190383 Copying to database...
        2015-05-29 12:49:28.140451 Removing intermediate files...
        2015-05-29 12:49:28.147451 Adding primary keys
        2015-05-29 12:49:28.655683 Adding foreign keys
        2015-05-29 12:49:29.365350 Done
        $ python tools/perf/scripts/python/call-graph-from-postgresql.py pt_example
        # The result is a GUI window with a tree representing a context-sensitive
        # call-graph.  Expanding a couple of levels of the tree and adjusting column
        # widths to suit will display something like:
      
                                               Call Graph: pt_example
        Call Path                        |Object     |Count|Time(ns)|Time(%)|Branch Count|Branch Count(%)
        v- ls
           v- 2638:2638
               v- _start                  ld-2.19.so    1   10074071  100.0        211135          100.0
                 |- unknown               unknown       1      13198    0.1             1            0.0
                 >- _dl_start             ld-2.19.so    1    1400980   13.9         19637            9.3
                 >- _d_linit_internal     ld-2.19.so    1     448152    4.4         11094            5.3
                 v-__libc_start_main@plt  ls            1    8211741   81.5        180397           85.4
                    >- _dl_fixup          ld-2.19.so    1       7607    0.1           108            0.1
                    >- __cxa_atexit       libc-2.19.so  1      11737    0.1            10            0.0
                    >- __libc_csu_init    ls            1      10354    0.1            10            0.0
                    |- _setjmp            libc-2.19.so  1          0    0.0             4            0.0
                    v- main               ls            1    8182043   99.6        180254           99.9
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-11-git-send-email-adrian.hunter@intel.com
      [ Added 'python-pyside qt-postgresql' to the yum cmdline installing required packages ]
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      4b715d24
    • A
      perf tools: Put itrace options into an asciidoc include · 60b88d87
      Adrian Hunter 提交于
      perf script, report and inject all have the same itrace options. Put
      them into an asciidoc include file.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-10-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      60b88d87
    • A
      perf tools: Add Intel BTS support · d0170af7
      Adrian Hunter 提交于
      Intel BTS support fits within the new auxtrace infrastructure.  Recording is
      supporting by identifying the Intel BTS PMU, parsing options and setting up
      events.
      
      Decoding is supported by queuing up trace data by thread and then decoding
      synchronously delivering synthesized event samples into the session processing
      for tools to consume.
      
      Committer note:
      
      E.g:
      
        [root@felicio ~]# perf record --per-thread -e intel_bts// ls
        anaconda-ks.cfg  apctest.output  bin  kernel-rt-3.10.0-298.rt56.171.el7.x86_64.rpm  libexec  lock_page.bpf.c  perf.data  perf.data.old
        [ perf record: Woken up 3 times to write data ]
        [ perf record: Captured and wrote 4.367 MB perf.data ]
        [root@felicio ~]# perf evlist -v
        intel_bts//: type: 6, size: 112, { sample_period, sample_freq }: 1, sample_type: IP|TID|IDENTIFIER, read_format: ID, disabled: 1, enable_on_exec: 1, sample_id_all: 1, exclude_guest: 1
        dummy:u: type: 1, size: 112, config: 0x9, { sample_period, sample_freq }: 1, sample_type: IP|TID|IDENTIFIER, read_format: ID, disabled: 1, exclude_kernel: 1, exclude_hv: 1, mmap: 1, comm: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, mmap2: 1, comm_exec: 1
        [root@felicio ~]# perf script # the navigate in the pager to some interesting place:
          ls 1843 1 branches: ffffffff810a60cb flush_signal_handlers ([kernel.kallsyms]) => ffffffff8121a522 setup_new_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8121a529 setup_new_exec ([kernel.kallsyms]) => ffffffff8122fa30 do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122fa5d do_close_on_exec ([kernel.kallsyms]) => ffffffff81767ae0 _raw_spin_lock ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff81767af4 _raw_spin_lock ([kernel.kallsyms]) => ffffffff8122fa62 do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122fa8e do_close_on_exec ([kernel.kallsyms]) => ffffffff8122faf0 do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122faf7 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fa8b do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122fa8e do_close_on_exec ([kernel.kallsyms]) => ffffffff8122faf0 do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122faf7 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fa8b do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122fa8e do_close_on_exec ([kernel.kallsyms]) => ffffffff8122faf0 do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122faf7 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fa8b do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122fa8e do_close_on_exec ([kernel.kallsyms]) => ffffffff8122faf0 do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122faf7 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fa8b do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122fa8e do_close_on_exec ([kernel.kallsyms]) => ffffffff8122faf0 do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122faf7 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fa8b do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122fa8e do_close_on_exec ([kernel.kallsyms]) => ffffffff8122faf0 do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122faf7 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fa8b do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122fac9 do_close_on_exec ([kernel.kallsyms]) => ffffffff8122fad2 do_close_on_exec ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8122fadd do_close_on_exec ([kernel.kallsyms]) => ffffffff8120fc80 filp_close ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8120fcaf filp_close ([kernel.kallsyms]) => ffffffff8120fcb6 filp_close ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8120fcc2 filp_close ([kernel.kallsyms]) => ffffffff812547f0 dnotify_flush ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff81254823 dnotify_flush ([kernel.kallsyms]) => ffffffff8120fcc7 filp_close ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8120fccd filp_close ([kernel.kallsyms]) => ffffffff81261790 locks_remove_posix ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff812617a3 locks_remove_posix ([kernel.kallsyms]) => ffffffff812617b9 locks_remove_posix ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff812617b9 locks_remove_posix ([kernel.kallsyms]) => ffffffff8120fcd2 filp_close ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8120fcd5 filp_close ([kernel.kallsyms]) => ffffffff812142c0 fput ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff812142d6 fput ([kernel.kallsyms]) => ffffffff812142df fput ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff8121430c fput ([kernel.kallsyms]) => ffffffff810b6580 task_work_add ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff810b65ad task_work_add ([kernel.kallsyms]) => ffffffff810b65b1 task_work_add ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff810b65c1 task_work_add ([kernel.kallsyms]) => ffffffff810bc710 kick_process ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff810bc725 kick_process ([kernel.kallsyms]) => ffffffff810bc742 kick_process ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff810bc742 kick_process ([kernel.kallsyms]) => ffffffff810b65c6 task_work_add ([kernel.kallsyms])
          ls 1843 1 branches: ffffffff810b65c9 task_work_add ([kernel.kallsyms]) => ffffffff81214311 fput ([kernel.kallsyms])
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-9-git-send-email-adrian.hunter@intel.com
      [ Merged sample->time fix for bug found after first round of testing on slightly older kernel ]
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      d0170af7
    • D
      tools lib traceevent: Add checks for returned EVENT_ERROR type · 6f56e9cf
      Dean Nelson 提交于
      Running the following perf-stat command on an arm64 system produces the
      following result...
      
        [root@aarch64 ~]# perf stat -e kmem:mm_page_alloc -a sleep 1
          Warning: [kmem:mm_page_alloc] function sizeof not defined
          Warning: Error: expected type 4 but read 0
        Segmentation fault
        [root@aarch64 ~]#
      
      The second warning was a result of the first warning not stopping
      processing after it detected the issue.
      
      That is, code that found the issue reported the first problem, but
      because it did not exit out of the functions smoothly, it caused the
      other warning to appear and not only that, it later caused the SIGSEGV.
      Signed-off-by: NDean Nelson <dnelson@redhat.com>
      Reviewed-by: NSteven Rostedt <rostedt@goodmis.org>
      Acked-by: NNamhyung Kim <namhyung@kernel.org>
      Cc: Jiri Olsa <jolsa@kernel.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Link: http://lkml.kernel.org/r/20150820151632.13927.13791.email-sent-by-dnelson@tealSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      6f56e9cf
    • A
      perf tools: Fix Intel PT timestamp handling · 81cd60cc
      Adrian Hunter 提交于
      Events that don't sample the timestamp have a timestamp value of -1.
      
      Intel PT processing wasn't taking that into account.
      
      This is particularly noticeable with Intel BTS because timestamps are
      not requested by default.
      
      Then, if the conversion of -1 to TSC results in a small number, the
      processing is unaffected.
      
      However if the conversion results in a big number, then the data is
      processed prematurely before relevant sideband data like mmap events,
      which in turn results in samples with unknown dsos.
      
      Commiter note:
      
      Since BTS wasn't upstream, I split the patch to fold the BTS part with
      the patch introducing it, to avoid having this bug in the commit
      history. PT was already upstream, so this patch contains that part.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1440060692-5585-1-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      81cd60cc
    • A
      perf tools: /proc/kcore requires CAP_SYS_RAWIO message too noisy · 133de940
      Adrian Hunter 提交于
      The "/proc/kcore requires CAP_SYS_RAWIO" message comes up all the time
      for 'perf script' if vmlinux is not found and the user isn't root, even
      when the kernel is not being traced and even though the message is only
      really relevant for annotation.
      
      Change it to pr_debug and instead put a note in the message displayed if
      annotation is not possible.
      
      Also, the file being accessed might not be /proc/kcore.  Tools can be
      directed to a different location using the --kallsyms option in which
      case kcore is expected to be in the same directory.  Adjust the message
      so it is not misleading in that case.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Li Zhang <zhlcindy@linux.vnet.ibm.com>
      Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
      Link: http://lkml.kernel.org/r/1440065260-8802-1-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      133de940
    • A
      perf script: Fix segfault using --show-mmap-events · 05169df5
      Adrian Hunter 提交于
      Patch "perf script: Don't assume evsel position of tracking events"
      changed 'perf script' to use 'perf_evlist__id2evsel()'. That results
      in a segfault if there is more than 1 event and there are
      synthesized mmap events e.g.
      
      	$ perf record -e cycles,instructions -p$$ sleep 1
      	$ perf script --show-mmap-events
      	Segmentation fault (core dumped)
      
      That happens because these synthesized events have an 'id' of zero
      which does not match any 'evsel'.
      
      Currently, these synthesized events use the sample type of the first
      evsel.
      
      Change 'perf_evlist__id2evsel()' to reflect that which also makes
      it consistent with 'perf_evlist__event2evsel()'.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Fixes: 06b234ec ("perf script: Don't assume evsel position of tracking events")
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1440059205-1765-1-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      05169df5
    • I
      perf/x86/msr: Fix the MSR driver build · 82819ffb
      Ingo Molnar 提交于
      The new MSR PMU driver made use of rdtsc() which does not exist (yet) in
      this tree:
      
        arch/x86/kernel/cpu/perf_event_msr.c:91:3: error: implicit declaration of function 'rdtsc'
      
      Use the old rdtscll() primitive for now.
      Reported-by: Nkbuild test robot <fengguang.wu@intel.com>
      Cc: Andy Lutomirski <luto@amacapital.net>
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: linux-kernel@vger.kernel.org
      Signed-off-by: NIngo Molnar <mingo@kernel.org>
      82819ffb
  4. 20 8月, 2015 7 次提交
    • I
      Merge tag 'perf-core-for-mingo' of... · dd2281be
      Ingo Molnar 提交于
      Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core
      
      Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
      
        - Support Intel PT in several tools, enabling the use of the processor trace
          feature introduced in Intel Broadwell processors: (Adrian Hunter)
      
      	 # dmesg | grep Performance
      	 # [0.188477] Performance Events: PEBS fmt2+, 16-deep LBR, Broadwell events, full-width counters, Intel PMU driver.
      	 # perf record -e intel_pt//u -a sleep 1
      	 [ perf record: Woken up 1 times to write data ]
      	 [ perf record: Captured and wrote 0.216 MB perf.data ]
      	 # perf script # then navigate in the tool output to some area, like this one:
      	 184 1030 dl_main (/usr/lib64/ld-2.17.so) => 7f21ba661440 dl_main (/usr/lib64/ld-2.17.so)
      	 185 1457 dl_main (/usr/lib64/ld-2.17.so) => 7f21ba669f10 _dl_new_object (/usr/lib64/ld-2.17.so)
      	 186 9f37 _dl_new_object (/usr/lib64/ld-2.17.so) => 7f21ba677b90 strlen (/usr/lib64/ld-2.17.so)
      	 187 7ba3 strlen (/usr/lib64/ld-2.17.so) => 7f21ba677c75 strlen (/usr/lib64/ld-2.17.so)
      	 188 7c78 strlen (/usr/lib64/ld-2.17.so) => 7f21ba669f3c _dl_new_object (/usr/lib64/ld-2.17.so)
      	 189 9f8a _dl_new_object (/usr/lib64/ld-2.17.so) => 7f21ba65fab0 calloc@plt (/usr/lib64/ld-2.17.so)
      	 190 fab0 calloc@plt (/usr/lib64/ld-2.17.so) => 7f21ba675e70 calloc (/usr/lib64/ld-2.17.so)
      	 191 5e87 calloc (/usr/lib64/ld-2.17.so) => 7f21ba65fa90 malloc@plt (/usr/lib64/ld-2.17.so)
      	 192 fa90 malloc@plt (/usr/lib64/ld-2.17.so) => 7f21ba675e60 malloc (/usr/lib64/ld-2.17.so)
      	 193 5e68 malloc (/usr/lib64/ld-2.17.so) => 7f21ba65fa80 __libc_memalign@plt (/usr/lib64/ld-2.17.so)
      	 194 fa80 __libc_memalign@plt (/usr/lib64/ld-2.17.so) => 7f21ba675d50 __libc_memalign (/usr/lib64/ld-2.17.so)
      	 195 5d63 __libc_memalign (/usr/lib64/ld-2.17.so) => 7f21ba675e20 __libc_memalign (/usr/lib64/ld-2.17.so)
      	 196 5e40 __libc_memalign (/usr/lib64/ld-2.17.so) => 7f21ba675d73 __libc_memalign (/usr/lib64/ld-2.17.so)
      	 197 5d97 __libc_memalign (/usr/lib64/ld-2.17.so) => 7f21ba675e18 __libc_memalign (/usr/lib64/ld-2.17.so)
      	 198 5e1e __libc_memalign (/usr/lib64/ld-2.17.so) => 7f21ba675df9 __libc_memalign (/usr/lib64/ld-2.17.so)
      	 199 5e10 __libc_memalign (/usr/lib64/ld-2.17.so) => 7f21ba669f8f _dl_new_object (/usr/lib64/ld-2.17.so)
      	 200 9fc2 _dl_new_object (/usr/lib64/ld-2.17.so) =>  7f21ba678e70 memcpy (/usr/lib64/ld-2.17.so)
      	 201 8e8c memcpy (/usr/lib64/ld-2.17.so) => 7f21ba678ea0 memcpy (/usr/lib64/ld-2.17.so)
      
        - Fix annotation of vdso (Adrian Hunter)
      
        - Fix DWARF callchains in 'perf script' (Jiri Olsa)
      
        - Fix adding probes in kernel syscalls and listing which variables can be
          collected at kernel syscall function lines (Masami Hiramatsu)
      
      Build Fixes:
      
        - Fix 32-bit compilation error in util/annotate.c (Adrian Hunter)
      
        - Support static linking with libdw on Fedora 22 (Andi Kleen)
      
      Infrastructure changes:
      
        - Add a helper function to probe whether cpu-wide tracing is possible (Adrian Hunter)
      
        - Move vfs_getname storage to per thread area in 'perf trace' (Arnaldo Carvalho de Melo)
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: NIngo Molnar <mingo@kernel.org>
      dd2281be
    • I
    • I
      Merge tag 'perf-urgent-for-mingo' of... · 19667649
      Ingo Molnar 提交于
      Merge tag 'perf-urgent-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
      
      Pull perf/urgent fixes from Arnaldo Carvalho de Melo:
      
        - Fix buildid processing done at the end of a 'perf record' session, a
          problem that happened in workloads involving lots of small short-lived
          processes.  That code was not asking the perf_session layer to order
          the events.
      
          Make the code more robust to handle some of the problems with such
          out-of-order events and fix 'perf record' to ask for ordered events
          on systems where we have perf_event_attr.sample_id_all.  (Adrian Hunter)
      
        - Show backtrace when handling a SIGSEGV in 'perf top --stdio' (Arnaldo Carvalho de Melo)
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: NIngo Molnar <mingo@kernel.org>
      19667649
    • A
      perf top: Show backtrace when handling a SIGSEGV on --stdio mode · 09f4d78a
      Arnaldo Carvalho de Melo 提交于
      It was just freezing instead of informing about the SEGV, fix it and
      also print a backtrace, just like in the TUI mode and in 'perf trace'.
      
      Tested by provoking a NULL deref when pressing 'z':
      
           0.31%  libc-2.20.so     [.] malloc_consolidate
           0.31%  ld-2.20.so       [.] _dl_relocate_object
           0.28%  cc1              [.] ht_lookup
           0.28%  cc1              [.] ira_init_register_move_cost
        perf: Segmentation fault
        Obtained 7 stack frames.
        perf(dump_stack+0x32) [0x4d69f2]
        perf(sighandler_dump_stack+0x29) [0x4d6a89]
        /lib64/libc.so.6(+0x34960) [0x7f5064333960]
        perf() [0x438790]
        /lib64/libpthread.so.0(+0x752a) [0x7f50663dd52a]
        /lib64/libc.so.6(clone+0x6d) [0x7f50643ff22d]
        #
      Reported-by: NLinus Torvalds <torvalds@linux-foundation.org>
      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>
      Link: http://lkml.kernel.org/n/tip-pewrpzqd29rgmhu2wkk7fhww@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      09f4d78a
    • A
      perf tools: Fix buildid processing · cca8482c
      Adrian Hunter 提交于
      After recording, 'perf record' post-processes the data to determine
      which buildids are needed.
      
      That processing must process the data in time order, if possible,
      because otherwise dependent events, like forks and mmaps, will not make
      sense.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Tested-by: NJiri Olsa <jolsa@kernel.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Link: http://lkml.kernel.org/r/1439994561-27436-4-git-send-email-adrian.hunter@intel.com
      [ Moved the sample_id_add to after trying to open the events, use pr_warning ]
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      cca8482c
    • A
      perf tools: Make fork event processing more resilient · 5cb73340
      Adrian Hunter 提交于
      When processing a fork event, the tools lookup the parent thread by its
      tid.  In a couple of cases, it is possible for that thread to have the
      wrong pid.
      
      That can happen if the data is being processed out of order, or if the
      (fork) event that would have removed the erroneous thread was lost.
      
      Assume the latter case, print a dump message, remove the erroneous
      thread, create a new one with the correct pid, and keep going.
      Reported-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Tested-by: NJiri Olsa <jolsa@kernel.org>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Link: http://lkml.kernel.org/r/1439994561-27436-3-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      5cb73340
    • A
      perf tools: Avoid deadlock when map_groups are broken · 0d7e7acc
      Adrian Hunter 提交于
      Attempting to clone map groups onto themselves will deadlock.
      
      It only happens because of other bugs, but the code should protect
      itself anyway.
      Reported-by: NLinus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Tested-by: NJiri Olsa <jolsa@kernel.org>
      Link: http://lkml.kernel.org/r/1439994561-27436-2-git-send-email-adrian.hunter@intel.com
      [ Use pr_debug() instead of dump_fprintf() ]
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      0d7e7acc
  5. 19 8月, 2015 1 次提交
  6. 18 8月, 2015 5 次提交
  7. 17 8月, 2015 6 次提交
    • L
      Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 · a36304b9
      Linus Torvalds 提交于
      Pull crypto fixes from Herbert Xu:
       "This fixes the following issues:
      
         - a regression caused by the conversion of IPsec ESP to the new AEAD
           interface: ESN with authencesn no longer works because it relied on
           the AD input SG list having a specific layout which is no longer
           the case.  In linux-next authencesn is fixed properly and no longer
           assumes anything about the SG list format.  While for this release
           a minimal fix is applied to authencesn so that it works with the
           new linear layout.
      
         - fix memory corruption caused by bogus index in the caam hash code.
      
         - fix powerpc nx SHA hashing which could cause module load failures
           if module signature verification is enabled"
      
      * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
        crypto: caam - fix memory corruption in ahash_final_ctx
        crypto: nx - respect sg limit bounds when building sg lists for SHA
        crypto: authencesn - Fix breakage with new ESP code
      a36304b9
    • A
      perf tools: Take Intel PT into use · 5efb1d54
      Adrian Hunter 提交于
      To record an AUX area, the weak function auxtrace_record__init() must be
      implemented.
      
      Equally to decode an AUX area, the AUX area tracing type must be added
      to the perf_event__process_auxtrace_info() function.
      
      This patch makes those two changes plus hooks up default config for the
      intel_pt PMU.  Also some brief documentation is provided for using the
      tools with intel_pt.
      
      Commiter note:
      
      E.g:
      
        [root@perf4 ~]# dmesg
        451 [0.405807] Performance Events: PEBS fmt2+, 16-deep LBR, Broadwell events, full-width counters, Intel PMU driver.
        [root@perf4 ~]# perf --version
        perf version 4.1.g53874a
        [root@perf4 ~]#  perf record -e intel_pt//u -a sleep 10
        [ perf record: Woken up 1 times to write data ]
        [ perf record: Captured and wrote 0.383 MB perf.data ]
        [root@perf4 ~]# perf evlist
        intel_pt//u
        sched:sched_switch
        dummy:u
        [root@perf4 ~]# perf report --stdio
        # To display the perf.data header info, please use --header/--header-only options.
        #
        #
        # Total Lost Samples: 0
        #
        # Samples: 0  of event 'intel_pt//u'
        # Event count (approx.): 0
        #
        # Overhead  Command  Shared Object  Symbol
        # ........  .......  .............  ......
        #
      
        # Samples: 393  of event 'sched:sched_switch'
        # Event count (approx.): 393
        #
        # Overhead  Command         Shared Object     Symbol
        # ........  ..............  ................  ..............
          49.62%  swapper         [kernel.vmlinux]  [k] __schedule
          10.69%  rcu_sched       [kernel.vmlinux]  [k] __schedule
           6.62%  rcuos/0         [kernel.vmlinux]  [k] __schedule
           5.60%  kworker/0:1     [kernel.vmlinux]  [k] __schedule
           3.56%  rcuos/3         [kernel.vmlinux]  [k] __schedule
           3.05%  kworker/u384:2  [kernel.vmlinux]  [k] __schedule
           2.54%  kworker/2:0     [kernel.vmlinux]  [k] __schedule
           2.54%  tuned           [kernel.vmlinux]  [k] __schedule
        <SNIP>
        # Samples: 0  of event 'dummy:u'
        # Event count (approx.): 0
        #
        # Overhead  Command  Shared Object  Symbol
        # ........  .......  .............  ......
      
        # Samples: 28  of event 'instructions:u'
        # Event count (approx.): 5030172
        #
        # Overhead  Command     Shared Object        Symbol
        # ........  ..........  ...................  ................................
        #
          21.43%  tuned       libpython2.7.so.1.0  [.] PyEval_EvalFrameEx
                       |
                       ---PyEval_EvalFrameEx
                          |
                          |--83.33%-- PyEval_EvalCodeEx
                          |          PyEval_EvalFrameEx
                          |          |
                          |          |--60.00%-- PyEval_EvalCodeEx
                          |          |          PyEval_EvalFrameEx
                          |          |          PyEval_EvalFrameEx
                          |          |
                          |           --40.00%-- PyEval_EvalFrameEx
                          |
                           --16.67%-- PyEval_EvalFrameEx
                                     PyEval_EvalCodeEx
                                     PyEval_EvalFrameEx
                                     PyEval_EvalCodeEx
                                     PyEval_EvalFrameEx
                                     PyEval_EvalFrameEx
      
          14.29%  tuned       libpython2.7.so.1.0  [.] _PyType_Lookup
                       |
                       ---_PyType_Lookup
                          _PyObject_GenericGetAttrWithDict
                          PyEval_EvalFrameEx
                          PyEval_EvalCodeEx
                          PyEval_EvalFrameEx
                          PyEval_EvalCodeEx
                          PyEval_EvalFrameEx
                          |
                          |--75.00%-- PyEval_EvalFrameEx
                          |
                           --25.00%-- PyEval_EvalCodeEx
                                     PyEval_EvalFrameEx
                                     PyEval_EvalFrameEx
      
           3.57%  irqbalance  irqbalance           [.] 0x0000000000004038
                  |
                  ---0x4038
                     0x4761
                     0x4761
                     0x4761
                     0x49f1
                     0x2295
      
           3.57%  irqbalance  libc-2.17.so         [.] __GI_____strtoull_l_internal
                  |
                  ---__GI_____strtoull_l_internal
                     0x6f49
                     0x229a
      
           3.57%  irqbalance  libc-2.17.so         [.] __strchrnul
                  |
                  ---__strchrnul
                     vfprintf
                     __vsprintf_chk
                     __sprintf_chk
                     0x2724
                     0x4038
                     0x2331
      
           3.57%  irqbalance  libc-2.17.so         [.] __strstr_sse42
                  |
                  ---__strstr_sse42
                     0x71e0
                     0x229f
      
        # And now to some userspace ftrace on uninstrumented binaries 8-) :
        # Hand edited to make it a bit more compact, replacing /home/acme/bin/perf
        # with /bin/perf:
      
        [root@perf4 ~]# perf script
           perf 8921 [3] 7.310889: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.310889: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310889: 1 branches:u:       481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310889: 1 branches:u:       481630 perf_evlist__enable (/bin/perf) => 4816d8 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310889: 1 branches:u:       4816de perf_evlist__enable (/bin/perf) => 48164f perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310889: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310889: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
           perf 8921 [3] 7.310889: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.310889: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
           perf 8921 [3] 7.310890: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.310890: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310890: 1 branches:u:       481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310890: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310890: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
           perf 8921 [3] 7.310890: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.310890: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
           perf 8921 [3] 7.310893: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.310893: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310893: 1 branches:u:       4816a8 perf_evlist__enable (/bin/perf) => 4815f8 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310893: 1 branches:u:       4815fe perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310893: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310893: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
           perf 8921 [3] 7.310893: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.310893: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
           perf 8921 [3] 7.310956: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.310956: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310956: 1 branches:u:       481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310956: 1 branches:u:       481630 perf_evlist__enable (/bin/perf) => 4816d8 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310956: 1 branches:u:       4816de perf_evlist__enable (/bin/perf) => 48164f perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310956: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310956: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
           perf 8921 [3] 7.310956: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.310956: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
           perf 8921 [3] 7.310961: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.310961: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310961: 1 branches:u:       481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310961: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310961: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
           perf 8921 [3] 7.310961: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.310961: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
           perf 8921 [3] 7.310968: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.310968: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310968: 1 branches:u:       4816a8 perf_evlist__enable (/bin/perf) => 4815f8 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310968: 1 branches:u:       4815fe perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310968: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.310968: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
           perf 8921 [3] 7.310968: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.310968: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
           perf 8921 [3] 7.311040: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.311040: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.311040: 1 branches:u:       481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.311040: 1 branches:u:       481630 perf_evlist__enable (/bin/perf) => 4816d8 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.311040: 1 branches:u:       4816de perf_evlist__enable (/bin/perf) => 48164f perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.311040: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.311040: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
           perf 8921 [3] 7.311040: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.311040: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
           perf 8921 [3] 7.311046: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.311046: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.311046: 1 branches:u:       481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.311046: 1 branches:u:       481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
           perf 8921 [3] 7.311046: 1 branches:u:       481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
           perf 8921 [3] 7.311046: 1 branches:u:       41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.311046: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
           perf 8921 [3] 7.311050: 1 branches:u:            0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
           perf 8921 [3] 7.311050: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
      :
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-8-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      5efb1d54
    • A
      perf tools: Add Intel PT support · 90e457f7
      Adrian Hunter 提交于
      Add support for Intel Processor Trace.
      
      Intel PT support fits within the new auxtrace infrastructure.  Recording
      is supporting by identifying the Intel PT PMU, parsing options and
      setting up events.
      
      Decoding is supported by queuing up trace data by cpu or thread and then
      decoding synchronously delivering synthesized event samples into the
      session processing for tools to consume.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-7-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      90e457f7
    • A
      perf tools: Add Intel PT decoder · f4aa0819
      Adrian Hunter 提交于
      Add support for decoding an Intel Processor Trace.
      
      Intel PT trace data must be 'decoded' which involves walking the object
      code and matching the trace data packets.
      
      The decoder requests a buffer of binary data via a get_trace()
      call-back, which it decodes using instruction information which it gets
      via another call-back walk_insn().
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-6-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      f4aa0819
    • A
      perf tools: Add Intel PT log · 53af9284
      Adrian Hunter 提交于
      Add a facility to log Intel Processor Trace decoding.  The log is
      intended for debugging purposes only.
      
      The log file name is "intel_pt.log" and is opened in the current
      directory.  The log contains a record of all packets and instructions
      decoded and can get very large (10 MB would be a small one).
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1437150840-31811-5-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      53af9284
    • A
      perf tools: Add Intel PT instruction decoder · 237fae79
      Adrian Hunter 提交于
      Add support for decoding instructions for Intel Processor Trace.  The
      kernel x86 instruction decoder is copied for this.
      
      This essentially provides intel_pt_get_insn() which takes a binary
      buffer, uses the kernel's x86 instruction decoder to get details of the
      instruction and then categorizes it for consumption by an Intel PT
      decoder.
      Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
      Cc: Jiri Olsa <jolsa@redhat.com>
      Link: http://lkml.kernel.org/r/1439450095-30122-1-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      237fae79