diff options
| author | Sonny Rao <sonnyrao@linux.vnet.ibm.com> | 2010-10-14 20:51:00 -0500 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2010-10-23 15:31:20 -0200 |
| commit | ffec516976f64b4e3e59ba1bb8a5020008cc678a (patch) | |
| tree | 295c348b1c6c747025093855fda2782df80f6ff7 /tools | |
| parent | 8bfb5e7d6a14b29cffddd113f4b0be7d9aafc1e8 (diff) | |
perf tools: Document event modifiers
Existing documentation doesn't discuss event modifiers, so add a description of
what's currently possible to the documentation of perf-list.
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Robert Richter <robert.richter@amd.com>
LKML-Reference: <1287107460-12112-1-git-send-email-sonnyrao@linux.vnet.ibm.com>
Signed-off-by: Sonny Rao <sonnyrao@linux.vnet.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/Documentation/perf-list.txt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt index 43e3dd284b9..399751befee 100644 --- a/tools/perf/Documentation/perf-list.txt +++ b/tools/perf/Documentation/perf-list.txt @@ -15,6 +15,23 @@ DESCRIPTION This command displays the symbolic event types which can be selected in the various perf commands with the -e option. +EVENT MODIFIERS +--------------- + +Events can optionally have a modifer by appending a colon and one or +more modifiers. Modifiers allow the user to restrict when events are +counted with 'u' for user-space, 'k' for kernel, 'h' for hypervisor. + +The 'p' modifier can be used for specifying how precise the instruction +address should be. The 'p' modifier is currently only implemented for +Intel PEBS and can be specified multiple times: + 0 - SAMPLE_IP can have arbitrary skid + 1 - SAMPLE_IP must have constant skid + 2 - SAMPLE_IP requested to have 0 skid + 3 - SAMPLE_IP must have 0 skid + +The PEBS implementation now supports up to 2. + RAW HARDWARE EVENT DESCRIPTOR ----------------------------- Even when an event is not available in a symbolic form within perf right now, |