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Diffstat (limited to 'tools/perf')
| -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, |