[tip:perf/core] perf intel-pt: Add documentation for new config terms

tip-bot for Adrian Hunter
2017-06-21T18:27:06Z

Commit-ID: 2bc60ffd663fc706ba70e603c369ae8ba0523b25
Gitweb: http://git.kernel.org/tip/2bc60ffd663fc706ba70e603c369ae8ba0523b25
Author: Adrian Hunter <adrian.hunter@intel.com>
AuthorDate: Fri, 26 May 2017 11:17:13 +0300
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 21 Jun 2017 11:35:49 -0300

perf intel-pt: Add documentation for new config terms

Add documentation for new config terms.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1495786658-18063-13-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Documentation/intel-pt.txt | 36 +++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)

diff --git a/tools/perf/Documentation/intel-pt.txt b/tools/perf/Documentation/intel-pt.txt
index b0b3007..d157dee 100644
--- a/tools/perf/Documentation/intel-pt.txt
+++ b/tools/perf/Documentation/intel-pt.txt
@@ -364,6 +364,42 @@ cyc_thresh Specifies how frequently CYC packets are produced - see cyc

CYC packets are not requested by default.

+pt Specifies pass-through which enables the 'branch' config term.
+
+ The default config selects 'pt' if it is available, so a user will
+ never need to specify this term.
+
+branch Enable branch tracing. Branch tracing is enabled by default so to
+ disable branch tracing use 'branch=0'.
+
+ The default config selects 'branch' if it is available.
+
+ptw Enable PTWRITE packets which are produced when a ptwrite instruction
+ is executed.
+
+ Support for this feature is indicated by:
+
+ /sys/bus/event_source/devices/intel_pt/caps/ptwrite
+
+ which contains "1" if the feature is supported and
+ "0" otherwise.
+
+fup_on_ptw Enable a FUP packet to follow the PTWRITE packet. The FUP packet
+ provides the address of the ptwrite instruction. In the absence of
+ fup_on_ptw, the decoder will use the address of the previous branch
+ if branch tracing is enabled, otherwise the address will be zero.
+ Note that fup_on_ptw will work even when branch tracing is disabled.
+
+pwr_evt Enable power events. The power events provide information about
+ changes to the CPU C-state.
+
+ Support for this feature is indicated by:
+
+ /sys/bus/event_source/devices/intel_pt/caps/power_event_trace
+
+ which contains "1" if the feature is supported and
+ "0" otherwise.
+

new snapshot option
-------------------