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| -rw-r--r-- | tools/perf/Documentation/perf-trace.txt | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt index 07065efa60e..60e5900da48 100644 --- a/tools/perf/Documentation/perf-trace.txt +++ b/tools/perf/Documentation/perf-trace.txt @@ -8,18 +8,43 @@ perf-trace - Read perf.data (created by perf record) and display trace output SYNOPSIS -------- [verse] -'perf trace' [-i <file> | --input=file] symbol_name +'perf trace' {record <script> | report <script> [args] } DESCRIPTION ----------- This command reads the input file and displays the trace recorded. +There are several variants of perf trace: + + 'perf trace' to see a detailed trace of the workload that was + recorded. + + 'perf trace record <script>' to record the events required for 'perf + trace report'. <script> is the name displayed in the output of + 'perf trace --list' i.e. the actual script name minus any language + extension. + + 'perf trace report <script>' to run and display the results of + <script>. <script> is the name displayed in the output of 'perf + trace --list' i.e. the actual script name minus any language + extension. The perf.data output from a previous run of 'perf trace + record <script>' is used and should be present for this command to + succeed. + OPTIONS ------- -D:: --dump-raw-trace=:: Display verbose dump of the trace data. +-L:: +--Latency=:: + Show latency attributes (irqs/preemption disabled, etc). + +-l:: +--list=:: + Display a list of available trace scripts. + -s:: --script=:: Process trace data with the given script ([lang]:script[.ext]). |