From 3d5d68aabf4ff47cfb447ad90448ce50531be7f5 Mon Sep 17 00:00:00 2001 From: Kan Liang Date: Wed, 8 Jul 2015 04:44:54 -0400 Subject: [PATCH] perf record: Document setting '-e pmu/period=N/' in man page The 'period' param is not defined in /sys/bus/event_sources/devices//format/*, but can be used, document it. Signed-off-by: Kan Liang Acked-by: Jiri Olsa Cc: Andi Kleen Cc: Namhyung Kim Link: http://lkml.kernel.org/r/1436345097-11113-3-git-send-email-kan.liang@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-record.txt | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 9b9d9d086680..5b47b2c88223 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -45,6 +45,14 @@ OPTIONS param1 and param2 are defined as formats for the PMU in: /sys/bus/event_sources/devices//format/* + There are also some params which are not defined in ...//format/*. + These params can be used to set event defaults. + Here is a list of the params. + - 'period': Set event sampling period + + Note: If user explicitly sets options which conflict with the params, + the value set by the params will be overridden. + - a hardware breakpoint event in the form of '\mem:addr[/len][:access]' where addr is the address in memory you want to break in. Access is the memory access type (read, write, execute) it can -- 2.20.1