summaryrefslogtreecommitdiffstats
path: root/Documentation
diff options
context:
space:
mode:
authorArjan van de Ven <arjan@linux.intel.com>2009-09-17 16:11:28 +0200
committerIngo Molnar <mingo@elte.hu>2009-09-19 11:42:12 +0200
commit6161352142d5fed4cd753b32e5ccde66e705b14e (patch)
treed64d0e3e6c44440181ddb5d1bc6884067fee0749 /Documentation
parentfd39e055c4fefa4553efc9030f9903afdc6ee323 (diff)
downloadop-kernel-dev-6161352142d5fed4cd753b32e5ccde66e705b14e.zip
op-kernel-dev-6161352142d5fed4cd753b32e5ccde66e705b14e.tar.gz
tracing, perf: Convert the power tracer into an event tracer
This patch converts the existing power tracer into an event tracer, so that power events (C states and frequency changes) can be tracked via "perf". This also removes the perl script that was used to demo the tracer; its functionality is being replaced entirely with timechart. Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20090912130542.6d314860@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/trace/power.txt17
1 files changed, 0 insertions, 17 deletions
diff --git a/Documentation/trace/power.txt b/Documentation/trace/power.txt
deleted file mode 100644
index cd805e1..0000000
--- a/Documentation/trace/power.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-The power tracer collects detailed information about C-state and P-state
-transitions, instead of just looking at the high-level "average"
-information.
-
-There is a helper script found in scrips/tracing/power.pl in the kernel
-sources which can be used to parse this information and create a
-Scalable Vector Graphics (SVG) picture from the trace data.
-
-To use this tracer:
-
- echo 0 > /sys/kernel/debug/tracing/tracing_enabled
- echo power > /sys/kernel/debug/tracing/current_tracer
- echo 1 > /sys/kernel/debug/tracing/tracing_enabled
- sleep 1
- echo 0 > /sys/kernel/debug/tracing/tracing_enabled
- cat /sys/kernel/debug/tracing/trace | \
- perl scripts/tracing/power.pl > out.sv
OpenPOWER on IntegriCloud