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Subject[PATCH 2/2] doc: update mmiotrace documentation
From 9fac48964c6d109589c9d610a727f72d2a1835dc Mon Sep 17 00:00:00 2001
From: Pekka Paalanen <pq@iki.fi>
Date: Sun, 23 Nov 2008 20:59:56 +0200
Subject: [PATCH] doc: update mmiotrace documentation

Update to reflect the current state of the tracing framework:
- "none" tracer has been replaced by "nop" tracer
- tracing_enabled must be toggled when changing buffer size

Signed-off-by: Pekka Paalanen <pq@iki.fi>
---
Documentation/tracers/mmiotrace.txt | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/Documentation/tracers/mmiotrace.txt b/Documentation/tracers/mmiotrace.txt
index 5bbbe20..cde23b4 100644
--- a/Documentation/tracers/mmiotrace.txt
+++ b/Documentation/tracers/mmiotrace.txt
@@ -37,7 +37,7 @@ $ echo mmiotrace > /debug/tracing/current_tracer
$ cat /debug/tracing/trace_pipe > mydump.txt &
Start X or whatever.
$ echo "X is up" > /debug/tracing/trace_marker
-$ echo none > /debug/tracing/current_tracer
+$ echo nop > /debug/tracing/current_tracer
Check for lost events.


@@ -66,7 +66,7 @@ which action. It is recommended to place descriptive markers about what you
do.

Shut down mmiotrace (requires root privileges):
-$ echo none > /debug/tracing/current_tracer
+$ echo nop > /debug/tracing/current_tracer
The 'cat' process exits. If it does not, kill it by issuing 'fg' command and
pressing ctrl+c.

@@ -81,7 +81,9 @@ are:
$ cat /debug/tracing/trace_entries
gives you a number. Approximately double this number and write it back, for
instance:
+$ echo 0 > /debug/tracing/tracing_enabled
$ echo 128000 > /debug/tracing/trace_entries
+$ echo 1 > /debug/tracing/tracing_enabled
Then start again from the top.

If you are doing a trace for a driver project, e.g. Nouveau, you should also
--
1.5.6.4


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