There is an upper limit to what tooling considers a valid callchain,
and it was tied to the hardcoded value in the kernel,
PERF_MAX_STACK_DEPTH (127), now that this can be tuned via a sysctl,
make it read it and use that as the upper limit, falling back to
PERF_MAX_STACK_DEPTH for kernels where this sysctl isn't present.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-yjqsd30nnkogvj5oyx9ghir9@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Works just like with 'perf report'. In some cases we may want to have
more than 127 entries, the default maximum.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-mqkz2p5ok2978gztb0vsnocc@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1458823940-24583-6-git-send-email-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

This patch improves perf script by enabling printing of the
branch stack via the 'brstack' and 'brstacksym' arguments to
the field selection option -F. The option is off by default
and operates only if the perf.data file has branch stack content.

The branches are printed in to/from pairs. The most recent branch
is printed first. The number of branch entries vary based on the
underlying hardware and filtering used.

The brstack prints FROM/TO addresses in raw hexadecimal format.
The brstacksym prints FROM/TO addresses in symbolic form wherever
possible.

 $ perf script -F ip,brstack
  5d3000 0x401aa0/0x5d2000/M/-/-/-/0 ...

 $ perf script -F ip,brstacksym
  4011e0 noploop+0x0/noploop+0x0/P/-/-/0

The notation F/T/M/X/A/C describes the attributes of the branch.
F=from, T=to, M/P=misprediction/prediction, X=TSX, A=TSX abort, C=cycles (SKL)
Signed-off-by: NStephane Eranian <eranian@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yuanfang Chen <cyfmxc@gmail.com>
Link: http://lkml.kernel.org/r/1441039273-16260-5-git-send-email-eranian@google.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Add option --ns to display time to 9 decimal places.  That is useful in
some cases, for example when using Intel PT cycle accurate mode.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1443186956-18718-6-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

This patch adds the output of the interrupted machine state (iregs) to
perf script. It presents them  as NAME:VALUE so this is easy to parse
during post processing.

To capture the interrupted machine state:
   $ perf record -I ....

to display iregs, use the -F option:

   $ perf script -F ip,iregs
   40afc2   AX:0x6c5770    BX:0x1e    CX:0x5f4d80a    DX:0x101010101010101    SI:0x1
Signed-off-by: NStephane Eranian <eranian@google.com>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1441039273-16260-2-git-send-email-eranian@google.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Sometimes when post-processing output from `perf script` one does not
want to demangle C++ symbol names. Add an option to allow this.

Also add --[no-]demangle-kernel to be consistent with top/report/probe.
Signed-off-by: NMark Drayton <mbd@fb.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1440616695-32340-1-git-send-email-scientist@fb.comSigned-off-by: NYannick Brosseau <scientist@fb.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

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>

For perf report/script srcline currently only the base file name of the
source file is printed. This is a good default because it usually fits
on the screen.

But in some cases we want to know the full file name, for example to
aggregate hits per file.

In the later case we need more than the base file name to resolve file
naming collisions: for example the kernel source has ~70 files named
"core.c"

It's also useful as input to post processing tools which want to point
to the right file.

Add a flag to allow full file name output.

Add an option to perf report/script to enable this option.
Signed-off-by: NAndi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1438986245-15191-1-git-send-email-andi@firstfloor.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Add option --show-switch-events to show switch events in a similar
fashion to --show-task-events and --show-mmap-events.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Acked-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: NJiri Olsa <jolsa@redhat.com>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1437471846-26995-6-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Add AUX area tracing option 'x' to synthesize events for transactions.
This will be used by Intel PT to synthesize an event record for each TSX
start, commit or abort.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Acked-by: NJiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1430404667-10593-6-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Instruction tracing will typically have access to information about the
instruction being executed for a particular ip sample.  Some of that
information will be available in the 'flags' member of struct
perf_sample.

With the addition of transactions events synthesis to Instruction
Tracing options, there is a need to be able easily to see the flags
because they show whether the ip is at the start, commit or abort of a
tranasaction.

Consequently add an option to display the flags.

The flags are "bcrosyiABEx" which stand for branch, call, return,
conditional, system, asynchronous, interrupt, transaction abort, trace
begin, trace end, and in transaction, respectively.

Example using Intel PT:

perf script -fip,time,event,sym,addr,flags

...
 1288.721584105: branches:u:   bo              401146 main =>           401152 main
 1288.721584105: transactions:   x                   0           401164 main
 1288.721584105: branches:u:   bx              40117c main =>           40119b main
 1288.721584105: branches:u:   box             4011a4 main =>           40117e main
 1288.721584105: branches:u:   bcx             401187 main =>           401094 g
...
 1288.721591645: branches:u:   bx              4010c4 g =>           4010cb g
 1288.721591645: branches:u:   brx             4010cc g =>           401189 main
 1288.721591645: transactions:                       0           4011a6 main
 1288.721593199: branches:u:   b               4011a9 main =>           4011af main
 1288.721593199: branches:u:   bo              4011bc main =>           40113e main
 1288.721593199: branches:u:   b               401150 main =>           40115a main
 1288.721593199: transactions:   x                   0           401164 main
 1288.721593199: branches:u:   bx              40117c main =>           40119b main
 1288.721593199: branches:u:   box             4011a4 main =>           40117e main
 1288.721593199: branches:u:   bcx             401187 main =>           40105e f
...
 1288.722284747: branches:u:   brx             401093 f =>           401189 main
 1288.722284747: branches:u:   box             4011a4 main =>           40117e main
 1288.722284747: branches:u:   bcx             401187 main =>           40105e f
 1288.722285883: transactions:   bA                  0           401071 f
 1288.722285883: branches:u:   bA              401071 f =>           40116a main
 1288.722285883: branches:u:   bE              40116a main =>                0 [unknown]
 1288.722297174: branches:u:   bB                   0 [unknown] =>           40116a main
...
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-26-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Add support for decoding an AUX area assuming it contains instruction
tracing data.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1428594864-29309-17-git-send-email-adrian.hunter@intel.com
[ Do not use -Z as an alternative to --itrace ]
[ Fixed initialization of itrace_synth_opts struct fields on older gcc versions ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

The 'record' and 'top' tools already allow a user to specify a CSV of
pids and/or tids of tasks to collect data.

Add those options to the 'report' and 'script' analysis commands to only
consider samples related to the given pids/tids.

This is also inline with the existing comm option.
Signed-off-by: NDavid Ahern <dsahern@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1427212361-7066-1-git-send-email-dsahern@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Janitorial stuff: boredom moment.

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: 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-u70i7shys3kths4hzru72bha@git.kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Adding period data column to be displayed in perf script.  It's possible
to get period values using -f option, like:

  $ perf script -f comm,tid,time,period,ip,sym,dso
          :26019 26019 52414.329088:       3707  ffffffff8105443a native_write_msr_safe ([kernel.kallsyms])
          :26019 26019 52414.329088:         44  ffffffff8105443a native_write_msr_safe ([kernel.kallsyms])
          :26019 26019 52414.329093:       1987  ffffffff8105443a native_write_msr_safe ([kernel.kallsyms])
          :26019 26019 52414.329093:          6  ffffffff8105443a native_write_msr_safe ([kernel.kallsyms])
              ls 26019 52414.329442:     537558        3407c0639c _dl_map_object_from_fd (/usr/lib64/ld-2.17.so)
              ls 26019 52414.329442:       2099        3407c0639c _dl_map_object_from_fd (/usr/lib64/ld-2.17.so)
              ls 26019 52414.330181:    1242100        34080917bb get_next_seq (/usr/lib64/libc-2.17.so)
              ls 26019 52414.330181:       3774        34080917bb get_next_seq (/usr/lib64/libc-2.17.so)
              ls 26019 52414.331427:    1083662  ffffffff810c7dc2 update_curr ([kernel.kallsyms])
              ls 26019 52414.331427:        360  ffffffff810c7dc2 update_curr ([kernel.kallsyms])
Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Acked-by: NDavid Ahern <dsahern@gmail.com>
Cc: "Jen-Cheng(Tommy) Huang" <tommy24@gatech.edu>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jen-Cheng(Tommy) Huang <tommy24@gatech.edu>
Cc: Namhyung Kim <namhyung@kernel.org>
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/1408977943-16594-9-git-send-email-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

This patch fix spelling typos found in tool/perf/Documentation.
Signed-off-by: NMasanari Iida <standby24x7@gmail.com>
Acked-by: NRandy Dunlap <rdunlap@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Randy Dunlap <rdunlap@infradead.org>
Link: http://lkml.kernel.org/r/1410275930-17207-1-git-send-email-standby24x7@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Currently the perf.data header is always displayed for stdio output,
which is no always useful.

Disabling header information by default and adding following options to
control header output:

  --header      - display header information
  --header-only - display header information only w/o further
                  processing
Signed-off-by: NJiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-0ehaawv5xc83w6ag03c5hi10@git.kernel.org
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
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/1386583370-1699-3-git-send-email-jolsa@redhat.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Add field 'srcline' that displays the source file name and line number
associated with the sample ip.  The information displayed is the same as
from addr2line.

 $ perf script -f comm,tid,pid,time,ip,sym,dso,symoff,srcline
            grep 10701/10701 2497321.421013:  ffffffff81043ffa native_write_msr_safe+0xa ([kernel.kallsyms])
  /usr/src/debug/kernel-3.9.fc17/linux-3.9.10-100.fc17.x86_64/arch/x86/include/asm/msr.h:95
            grep 10701/10701 2497321.421984:  ffffffff8165b6b3 _raw_spin_lock+0x13 ([kernel.kallsyms])
  /usr/src/debug/kernel-3.9.fc17/linux-3.9.10-100.fc17.x86_64/arch/x86/include/asm/spinlock.h:54
            grep 10701/10701 2497321.421990:  ffffffff810b64b3 tick_sched_timer+0x53 ([kernel.kallsyms])
  /usr/src/debug/kernel-3.9.fc17/linux-3.9.10-100.fc17.x86_64/kernel/time/tick-sched.c:840
            grep 10701/10701 2497321.421992:  ffffffff8106f63f run_timer_softirq+0x2f ([kernel.kallsyms])
  /usr/src/debug/kernel-3.9.fc17/linux-3.9.10-100.fc17.x86_64/kernel/timer.c:1372
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.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/1386315778-11633-3-git-send-email-adrian.hunter@intel.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

If --show-mmap-events option is given, also print internal MMAP and
MMAP2 events.  It would be helpful for debugging.

  $ perf script --show-mmap-events
  ...
           sleep  9486 [009] 3350640.335531: PERF_RECORD_MMAP 9486/9486: [0x400000(0x6000) @ 0]: x /usr/bin/sleep
           sleep  9486 [009] 3350640.335542: PERF_RECORD_MMAP 9486/9486: [0x3153a00000(0x223000) @ 0]: x /usr/lib64/ld-2.17.so
           sleep  9486 [009] 3350640.335553: PERF_RECORD_MMAP 9486/9486: [0x7fff8b5fe000(0x2000) @ 0x7fff8b5fe000]: x [vdso]
           sleep  9486 [009] 3350640.335643: PERF_RECORD_MMAP 9486/9486: [0x3153e00000(0x3c0000) @ 0]: x /usr/lib64/libc-2.17.so
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Suggested-by: NFrederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: NDavid Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@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/1385456066-26592-1-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

If --show-task-events option is given, also print internal COMM, FORK
and EXIT events.  It would be helpful for debugging.

  $ perf script --show-task-events
  ...
         swapper     0 [009] 3350640.335261: sched:sched_switch: prev_comm=swapper/9
           sleep  9486 [009] 3350640.335509: PERF_RECORD_COMM: sleep:9486
           sleep  9486 [009] 3350640.335806: sched:sched_stat_runtime: comm=sleep pid=9486
         firefox  2635 [003] 3350641.275896: PERF_RECORD_FORK(2635:9487):(2635:2635)
         firefox  2635 [003] 3350641.275896: sched:sched_process_fork: comm=firefox pid=2635
           sleep  9486 [009] 3350641.336009: PERF_RECORD_EXIT(9486:9486):(9486:9486)
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Suggested-by: NFrederic Weisbecker <fweisbec@gmail.com>
Reviewed-by: NDavid Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@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/1385455873-25865-1-git-send-email-namhyung@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Add the option get the path of [kernel.kallsyms].
Specify '--show-kernel-path' option to use this function.
This patch enables other applications to use this output easily.

Without --show-kernel-path  option

ffffffff81467612 irq_return ([kernel.kallsyms])
ffffffff81467612 irq_return ([kernel.kallsyms])
    7f24fc02a6b3 _start (/lib64/ld-2.14.so)
[snip]

With --show-kernel-path option

ffffffff81467612 irq_return (/lib/modules/3.2.0+/build/vmlinux)
ffffffff81467612 irq_return (/lib/modules/3.2.0+/build/vmlinux)
    7f24fc02a6b3 _start (/lib64/ld-2.14.so)
[snip]

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20120130044320.2384.73322.stgit@linux3Signed-off-by: NAkihiro Nagai <akihiro.nagai.hw@hitachi.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Add the offset field specifier 'symoff' to show the offset from
the symbols in the output of perf-script. We can get the more
detailed address information.

Output sample:
ffffffff81467612 irq_return+0x0 => 301ec016b0 _start+0x0
ffffffff81467612 irq_return+0x0 => 301ec016b0 _start+0x0
      301ec016b3 _start+0x3     => 301ec04b70 _dl_start+0x0
ffffffff81467612 irq_return+0x0 => 301ec04b70 _dl_start+0x0
ffffffff81467612 irq_return+0x0 => 301ec04b96 _dl_start+0x26
ffffffff81467612 irq_return+0x0 => 301ec04b9d _dl_start+0x2d
      301ec04beb _dl_start+0x7b => 301ec04c0d _dl_start+0x9d
      301ec04c11 _dl_start+0xa1 => 301ec04bf0 _dl_start+0x80
[snip]

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20120130044314.2384.67094.stgit@linux3Signed-off-by: NAkihiro Nagai <akihiro.nagai.hw@hitachi.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

The default input file for perf report is not handled the same way as
perf record does it for its output file. This leads to unexpected
behavior of perf report, etc. E.g.:

 # perf record -a -e cpu-cycles sleep 2 | perf report | cat
 failed to open perf.data: No such file or directory  (try 'perf record' first)

While perf record writes to a fifo, perf report expects perf.data to be
read. This patch changes this to accept fifos as input file.

Applies to the following commands:

 perf annotate
 perf buildid-list
 perf evlist
 perf kmem
 perf lock
 perf report
 perf sched
 perf script
 perf timechart

Also fixes char const* -> const char* type declaration for filename
strings.

v2:
* Prevent potential null pointer access to input_name in
  builtin-report.c. Needed due to removal of patch "perf report: Setup
  browser if stdout is a pipe"

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1323248577-11268-5-git-send-email-robert.richter@amd.comSigned-off-by: NRobert Richter <robert.richter@amd.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Allows collecting events system wide and then pulling out events for a
specific task name(s). e.g,

    perf script -c gnome-shell,gnome-terminal

Applies on top of:
    https://lkml.org/lkml/2011/11/13/74

v2->v3
- update Documentation

v1->v2
- use comm_list from symbol_conf

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1321894972-24246-1-git-send-email-dsahern@gmail.comSigned-off-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Currently the meaning of -C varies by perf command: for perf-top,
perf-stat, perf-record it means cpu list. For perf-report it means comm
list. Then perf-annotate, perf-report and perf-script use -c for cpu
list.

Fix annotate, report and script to use -C for cpu list to be consistent
with top, stat and record. This means report needs to use -c for comm
list which does introduce a backward compatibility change.

v1 -> v2
- update perf-script.txt too

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1321209008-7004-1-git-send-email-dsahern@gmail.comSigned-off-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

The goal of this patch is to include more information about the host
environment into the perf.data so it is more self-descriptive. Overtime,
profiles are captured on various machines and it becomes hard to track
what was recorded, on what machine and when.

This patch provides a way to solve this by extending the perf.data file
with basic information about the host machine. To add those extensions,
we leverage the feature bits capabilities of the perf.data format.  The
change is backward compatible with existing perf.data files.

We define the following useful new extensions:
 - HEADER_HOSTNAME: the hostname
 - HEADER_OSRELEASE: the kernel release number
 - HEADER_ARCH: the hw architecture
 - HEADER_CPUDESC: generic CPU description
 - HEADER_NRCPUS: number of online/avail cpus
 - HEADER_CMDLINE: perf command line
 - HEADER_VERSION: perf version
 - HEADER_TOPOLOGY: cpu topology
 - HEADER_EVENT_DESC: full event description (attrs)
 - HEADER_CPUID: easy-to-parse low level CPU identication

The small granularity for the entries is to make it easier to extend
without breaking backward compatiblity. Many entries are provided as
ASCII strings.

Perf report/script have been modified to print the basic information as
easy-to-parse ASCII strings. Extended information about CPU and NUMA
topology may be requested with the -I option.

Thanks to David Ahern for reviewing and testing the many versions of
this patch.

 $ perf report --stdio
 # ========
 # captured on : Mon Sep 26 15:22:14 2011
 # hostname : quad
 # os release : 3.1.0-rc4-tip
 # perf version : 3.1.0-rc4
 # arch : x86_64
 # nrcpus online : 4
 # nrcpus avail : 4
 # cpudesc : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
 # cpuid : GenuineIntel,6,15,11
 # total memory : 8105360 kB
 # cmdline : /home/eranian/perfmon/official/tip/build/tools/perf/perf record date
 # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 29, 30, 31,
 # HEADER_CPU_TOPOLOGY info available, use -I to display
 # HEADER_NUMA_TOPOLOGY info available, use -I to display
 # ========
 #
 ...

 $ perf report --stdio -I
 # ========
 # captured on : Mon Sep 26 15:22:14 2011
 # hostname : quad
 # os release : 3.1.0-rc4-tip
 # perf version : 3.1.0-rc4
 # arch : x86_64
 # nrcpus online : 4
 # nrcpus avail : 4
 # cpudesc : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
 # cpuid : GenuineIntel,6,15,11
 # total memory : 8105360 kB
 # cmdline : /home/eranian/perfmon/official/tip/build/tools/perf/perf record date
 # event : name = cycles, type = 0, config = 0x0, config1 = 0x0, config2 = 0x0, excl_usr = 0, excl_kern = 0, id = { 29, 30, 31,
 # sibling cores   : 0-3
 # sibling threads : 0
 # sibling threads : 1
 # sibling threads : 2
 # sibling threads : 3
 # node0 meminfo  : total = 8320608 kB, free = 7571024 kB
 # node0 cpu list : 0-3
 # ========
 #
 ...
Reviewed-by: NDavid Ahern <dsahern@gmail.com>
Tested-by: NDavid Ahern <dsahern@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20110930134040.GA5575@quadSigned-off-by: NStephane Eranian <eranian@google.com>
[ committer notes: Use --show-info in the tools as was in the docs, rename
  perf_header_fprintf_info to perf_file_section__fprintf_info, fixup
  conflict with f69b64f7 "perf: Support setting the disassembler style" ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Add an option to perf report/annotate/script to specify which
CPUs to operate on. This enables us to take a single system wide
profile and analyse each CPU (or group of CPUs) in isolation.

This was useful when profiling a multiprocess workload where the
bottleneck was on one CPU but this was hidden in the overall
profile. Per process and per thread breakdowns didn't help
because multiple processes were running on each CPU and no
single process consumed an entire CPU.

The patch converts the list of CPUs returned by cpu_map__new
into a bitmap for fast lookup. I wanted to use -C to be
consistent with perf top/record/stat, but unfortunately perf
report already uses -C <comms>.

 v2: Incorporate suggestions from David Ahern:
	- Added -c to perf script
	- Check that SAMPLE_CPU is set when -c is used
	- Update documentation

 v3: Create perf_session__cpu_bitmap()
Signed-off-by: NAnton Blanchard <anton@samba.org>
Acked-by: NDavid Ahern <dsahern@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Link: http://lkml.kernel.org/r/20110704215750.11647eb9@krytenSigned-off-by: NIngo Molnar <mingo@elte.hu>

Resolve to a function or variable if possible and if the sym option is
enabled.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1306782503-22002-1-git-send-email-dsahern@gmail.comSigned-off-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

The 'sym' option displays both the function name and the DSO it comes
from. Split the display of the dso into a separate option.  This allows
display of the ip address and symbol without the dso, thus shortening
line lengths - and decluttering the output a bit.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1306528124-25861-3-git-send-email-dsahern@gmail.comSigned-off-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Currently the "sym" output field is used to dump instruction pointers
and callchain stack. Sample addresses can also be converted to symbols,
so the meaning of "sym" needs to be fixed. This patch adds an "ip"
option and if it is selected the user can also opt to dump symbols for
them. If the user opts to dump IP without syms only the address is
shown.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1306528124-25861-2-git-send-email-dsahern@gmail.comSigned-off-by: NDavid Ahern <dsahern@gmail.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Using the commit log for 2c9e45f7.

Cc: David Ahern <daahern@cisco.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Custom fields set for each type by prepending field argument with type.
For file with multiple event types (e.g., trace and S/W) display of an
event type suppressed by setting output fields to "".

e.g.,
perf record -ga -e sched:sched_switch -e cpu-clock -c 10000000 -R -- sleep 1
perf script

openssl 11496 [000]  9711.807107: cpu-clock-msecs:
        ffffffff810c22dc arch_local_irq_restore ([kernel.kallsyms])
        ffffffff810c518c __alloc_pages_nodemask ([kernel.kallsyms])
        ffffffff810297b2 pte_alloc_one ([kernel.kallsyms])
        ffffffff810d8b98 __pte_alloc ([kernel.kallsyms])
        ffffffff810daf07 handle_mm_fault ([kernel.kallsyms])
        ffffffff8138763a do_page_fault ([kernel.kallsyms])
        ffffffff81384a65 page_fault ([kernel.kallsyms])
            7f6130507d70 asn1_check_tlen (/lib64/libcrypto.so.1.0.0c)
                       0  ()

         openssl 11496 [000]  9711.808042: sched_switch: prev_comm=openssl ...
     kworker/0:0     4 [000]  9711.808067: sched_switch: prev_comm=kworker/...
         swapper     0 [001]  9711.808090: sched_switch: prev_comm=kworker/...
            sshd 11451 [001]  9711.808185: sched_switch: prev_comm=sshd pre...
swapper     0 [001]  9711.816155: cpu-clock-msecs:
        ffffffff81023609 native_safe_halt ([kernel.kallsyms])
        ffffffff8100132a cpu_idle ([kernel.kallsyms])
        ffffffff8137cf9b start_secondary ([kernel.kallsyms])

openssl 11496 [000]  9711.817104: cpu-clock-msecs:
            7f61304ad723 AES_cbc_encrypt (/lib64/libcrypto.so.1.0.0c)
            7fff3402f950  ()
        12f0debc9a785634  ()

swapper     0 [001]  9711.826155: cpu-clock-msecs:
        ffffffff81023609 native_safe_halt ([kernel.kallsyms])
        ffffffff8100132a cpu_idle ([kernel.kallsyms])
        ffffffff8137cf9b start_secondary ([kernel.kallsyms])

To suppress trace events within the file and use default output for S/W events:
perf script -f trace:

or to suppress S/W events and do default display for trace events:
perf script -f sw:

Custom field selections:
perf script -f sw:comm,tid,time -f trace:time,trace

         openssl 11496  9711.797162:
         swapper     0  9711.807071:
         openssl 11496  9711.807107:
 9711.808042: prev_comm=openssl prev_pid=11496 prev_prio=120 prev_state=R ...
 9711.808067: prev_comm=kworker/0:0 prev_pid=4 prev_prio=120 prev_state=S ...
 9711.808090: prev_comm=kworker/0:0 prev_pid=0 prev_prio=120 prev_state=R ...
 9711.808185: prev_comm=sshd prev_pid=11451 prev_prio=120 prev_state=S ==>...
         swapper     0  9711.816155:
         openssl 11496  9711.817104:
         swapper     0  9711.826155:
Acked-by: NFrederic Weisbecker <fweisbec@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <1299734608-5223-7-git-send-email-daahern@cisco.com>
Signed-off-by: NDavid Ahern <daahern@cisco.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Add option to dump symbols found in events.

e.g., perf script -f comm,pid,tid,time,trace,sym

swapper     0/0       537.037184: prev_comm=swapper prev_pid=0 prev_prio=120...
        ffffffff81030350 perf_trace_sched_switch ([kernel.kallsyms])
        ffffffff81382ac5 schedule ([kernel.kallsyms])
        ffffffff8100134a cpu_idle ([kernel.kallsyms])
        ffffffff81370b39 rest_init ([kernel.kallsyms])
        ffffffff81696c23 start_kernel ([kernel.kallsyms].init.text)
        ffffffff816962af x86_64_start_reservations ([kernel.kallsyms].init.text)
        ffffffff816963b9 x86_64_start_kernel ([kernel.kallsyms].init.text)

sshd  1675/1675    537.037309: prev_comm=sshd prev_pid=1675 prev_prio=120...
        ffffffff81030350 perf_trace_sched_switch ([kernel.kallsyms])
        ffffffff81382ac5 schedule ([kernel.kallsyms])
        ffffffff813837aa schedule_hrtimeout_range_clock ([kernel.kallsyms])
        ffffffff81383886 schedule_hrtimeout_range ([kernel.kallsyms])
        ffffffff8110c4f9 poll_schedule_timeout ([kernel.kallsyms])
        ffffffff8110cd20 do_select ([kernel.kallsyms])
        ffffffff8110ced8 core_sys_select ([kernel.kallsyms])
        ffffffff8110d00d sys_select ([kernel.kallsyms])
        ffffffff81002bc2 system_call ([kernel.kallsyms])
            7f1647e56e93 __GI_select (/lib64/libc-2.12.90.so)

netstat  1692/1692    537.038664: prev_comm=netstat prev_pid=1692 prev_prio=...
        ffffffff81030350 perf_trace_sched_switch ([kernel.kallsyms])
        ffffffff81382ac5 schedule ([kernel.kallsyms])
        ffffffff81002c3a sysret_careful ([kernel.kallsyms])
            7f7a6cd1b210 __GI___libc_read (/lib64/libc-2.12.90.so)
Acked-by: NFrederic Weisbecker <fweisbec@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <1299734608-5223-6-git-send-email-daahern@cisco.com>
Signed-off-by: NDavid Ahern <daahern@cisco.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Allow a user to select which fields to print to stdout for event data.
Options include comm (command name), tid (thread id), pid (process id),
time (perf timestamp), cpu, event (for event name), and trace (for
trace data).

Default is set to maintain compatibility with current output; this
feature does alter output format slightly -- no '-' between command
and pid/tid.

Thanks to Frederic Weisbecker for detailed suggestions on this approach.

Examples (output compressed)

1. trace, default format

perf record -ga -e sched:sched_switch
perf script

swapper    0 [000] 537.037184: sched_switch: prev_comm=swapper prev_pid=0...
   sshd 1675 [000] 537.037309: sched_switch: prev_comm=sshd prev_pid=1675...
netstat 1692 [001] 537.038664: sched_switch: prev_comm=netstat prev_pid=1692...

2. trace, custom format

perf record -ga -e sched:sched_switch
perf script -f comm,pid,time,trace     <--- omitting cpu and event name

swapper    0 537.037184: prev_comm=swapper prev_pid=0 prev_prio=120 ...
   sshd 1675 537.037309: prev_comm=sshd prev_pid=1675 prev_prio=120 ...
netstat 1692 537.038664: prev_comm=netstat prev_pid=1692 prev_prio=120 ...
Acked-by: NFrederic Weisbecker <fweisbec@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
LKML-Reference: <1299734608-5223-5-git-send-email-daahern@cisco.com>
Signed-off-by: NDavid Ahern <daahern@cisco.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Free the perf trace name space and rename the trace to 'script' which is a
better match for the scripting engine.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

Add documentation describing new 'perf trace' command changes
e.g. <command> handling and live-mode/top variants.
Signed-off-by: NTom Zanussi <tom.zanussi@linux.intel.com>
Acked-by: NArnaldo Carvalho de Melo <acme@ghostprotocols.net>

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

Also small update to perf-trace-perl and perf-trace docs.
Signed-off-by: NTom Zanussi <tzanussi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1264580883-15324-13-git-send-email-tzanussi@gmail.com>
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>

'perf trace -s list' prints a list of the supported scripting
languages.  One problem with it is that it falls through and prints
the trace as well.  The use of 'list' for this also makes it easy to
confuse with 'perf trace -l', used for listing available scripts.  So
change 'perf trace -s list' to 'perf trace -s lang' and fixes the
fall-through problem.
Signed-off-by: NTom Zanussi <tzanussi@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Keiichi KII <k-keiichi@bx.jp.nec.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1264580883-15324-2-git-send-email-tzanussi@gmail.com>
Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>