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| author |   Pekka Paalanen <pq@iki.fi> | 2008-11-23 21:24:59 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-11-23 20:33:24 +0100 |
| commit | fb91ee6cf5b8be5360acec577458e29ec7e97e5e (patch) | |
| tree | c8eba73ad72f0c86658bb4a03bc6a04ef3d7e225 /Documentation | |
| parent | x86, mmiotrace: fix buffer overrun detection (diff) | |
| download | linux-dev-fb91ee6cf5b8be5360acec577458e29ec7e97e5e.tar.xz linux-dev-fb91ee6cf5b8be5360acec577458e29ec7e97e5e.zip | |
tracing, doc: update mmiotrace documentation
Impact: update 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- "none" tracer has been replaced by "nop" tracer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>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | 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 5bbbe2096223..cde23b4a12a1 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 |