diff options
| author | Ingo Molnar <mingo@kernel.org> | 2015-09-01 10:24:54 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-09-01 10:25:57 +0200 |
| commit | 532026612455a4a6fd27c1b2e7111263f63218a2 (patch) | |
| tree | e8bd142665af1ef296bb663a959dc5a8e2b6b5dc /tools/perf/Documentation | |
| parent | 65a99597f044c083983f4274ab049c9ec3b9d764 (diff) | |
| parent | bcc84ec65ad1bd9f777a1fade6f8e5e0c5808fa5 (diff) | |
Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent
Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:
User visible changes:
- Add ability to specify to select which registers to record,
to reduce the size of perf.data files, and also allow printing
the registers in 'perf script': (Stephane Eranian)
# perf record --intr-regs=AX,SP usleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.016 MB perf.data (8 samples) ]
# perf script -F ip,sym,iregs | tail -5
ffffffff8105f42a native_write_msr_safe AX:0xf SP:0xffff8802629c3c00
ffffffff8105f42a native_write_msr_safe AX:0xf SP:0xffff8802629c3c00
ffffffff81761ac0 _raw_spin_lock AX:0xffff8801bfcf8020 SP:0xffff8802629c3ce8
ffffffff81202bf8 __vma_adjust_trans_huge AX:0x7ffc75200000 SP:0xffff8802629c3b30
ffffffff8122b089 dput AX:0x101 SP:0xffff8802629c3c78
#
Infrastructure changes:
- Open event on evsel cpus and threads. (Kan Liang)
- Add new bpf API to get name from a BPF object. (Wang Nan)
Build fixes:
- Fix build on powerpc broken by pt/bts. (Adrian Hunter)
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 6 | ||||
| -rw-r--r-- | tools/perf/Documentation/perf-script.txt | 2 |
2 files changed, 6 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 347a27322ed8..2e9ce77b5e14 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -276,7 +276,11 @@ filter out the startup phase of the program, which is often very different. --intr-regs:: Capture machine state (registers) at interrupt, i.e., on counter overflows for each sample. List of captured registers depends on the architecture. This option -is off by default. +is off by default. It is possible to select the registers to sample using their +symbolic names, e.g. on x86, ax, si. To list the available registers use +--intr-regs=\?. To name registers, pass a comma separated list such as +--intr-regs=ax,bx. The list of register is architecture dependent. + --running-time:: Record running and enabled time for read events (:S) diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt index 614b2c7b0293..dc3ec783b7bd 100644 --- a/tools/perf/Documentation/perf-script.txt +++ b/tools/perf/Documentation/perf-script.txt @@ -116,7 +116,7 @@ OPTIONS --fields:: Comma separated list of fields to print. Options are: comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr, symoff, - srcline, period, flags. + srcline, period, iregs, flags. Field list can be prepended with the type, trace, sw or hw, to indicate to which event type the field list applies. e.g., -f sw:comm,tid,time,ip,sym and -f trace:time,cpu,trace |