diff options
Diffstat (limited to 'Documentation/tracers/mmiotrace.txt')
| -rw-r--r-- | Documentation/tracers/mmiotrace.txt | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/Documentation/tracers/mmiotrace.txt b/Documentation/tracers/mmiotrace.txt index cde23b4a12a1..5731c67abc55 100644 --- a/Documentation/tracers/mmiotrace.txt +++ b/Documentation/tracers/mmiotrace.txt | |||
| @@ -78,12 +78,10 @@ to view your kernel log and look for "mmiotrace has lost events" warning. If | |||
| 78 | events were lost, the trace is incomplete. You should enlarge the buffers and | 78 | events were lost, the trace is incomplete. You should enlarge the buffers and |
| 79 | try again. Buffers are enlarged by first seeing how large the current buffers | 79 | try again. Buffers are enlarged by first seeing how large the current buffers |
| 80 | are: | 80 | are: |
| 81 | $ cat /debug/tracing/trace_entries | 81 | $ cat /debug/tracing/buffer_size_kb |
| 82 | gives you a number. Approximately double this number and write it back, for | 82 | gives you a number. Approximately double this number and write it back, for |
| 83 | instance: | 83 | instance: |
| 84 | $ echo 0 > /debug/tracing/tracing_enabled | 84 | $ echo 128000 > /debug/tracing/buffer_size_kb |
| 85 | $ echo 128000 > /debug/tracing/trace_entries | ||
| 86 | $ echo 1 > /debug/tracing/tracing_enabled | ||
| 87 | Then start again from the top. | 85 | Then start again from the top. |
| 88 | 86 | ||
| 89 | If you are doing a trace for a driver project, e.g. Nouveau, you should also | 87 | If you are doing a trace for a driver project, e.g. Nouveau, you should also |