Linux-libre 4.3.2-gnu

1 files changed, 21 insertions, 0 deletions

diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
index 776aec4d0..f6a23eb29 100644
--- a/tools/perf/Documentation/perf-top.txt
+++ b/tools/perf/Documentation/perf-top.txt
@@ -208,6 +208,27 @@ Default is to monitor all CPUS.
 	This option sets the time out limit. The default value is 500 ms.
 
 
+-b::
+--branch-any::
+	Enable taken branch stack sampling. Any type of taken branch may be sampled.
+	This is a shortcut for --branch-filter any. See --branch-filter for more infos.
+
+-j::
+--branch-filter::
+	Enable taken branch stack sampling. Each sample captures a series of consecutive
+	taken branches. The number of branches captured with each sample depends on the
+	underlying hardware, the type of branches of interest, and the executed code.
+	It is possible to select the types of branches captured by enabling filters.
+	For a full list of modifiers please see the perf record manpage.
+
+	The option requires at least one branch type among any, any_call, any_ret, ind_call, cond.
+	The privilege levels may be omitted, in which case, the privilege levels of the associated
+	event are applied to the branch filter. Both kernel (k) and hypervisor (hv) privilege
+	levels are subject to permissions.  When sampling on multiple events, branch stack sampling
+	is enabled for all the sampling events. The sampled branch type is the same for all events.
+	The various filters must be specified as a comma separated list: --branch-filter any_ret,u,k
+	Note that this feature may not be available on all processors.
+
 INTERACTIVE PROMPTING KEYS
 --------------------------