From: Sonny Rao Date: Fri, 15 Oct 2010 01:51:00 +0000 (-0500) Subject: perf tools: Document event modifiers X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ffec516976f64b4e3e59ba1bb8a5020008cc678a;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git 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 Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Robert Richter LKML-Reference: <1287107460-12112-1-git-send-email-sonnyrao@linux.vnet.ibm.com> Signed-off-by: Sonny Rao Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt index 43e3dd284b90..399751befeed 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,