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| author | Andreas Madsen <amwebdk@gmail.com> | 2018-01-31 17:12:09 +0100 |
|---|---|---|
| committer | Anatoli Papirovski <apapirovski@mac.com> | 2018-03-04 12:07:39 +0100 |
| commit | 85212bb182f555f6d09e0b2f5f78d2d8e19bcef1 (patch) | |
| tree | 182b8e0698057e8760462964c0deef66e6ccb34c /doc/api/tracing.md | |
| parent | 523d44a66e5a4f9bbe335b7872919aa39d6ee4c4 (diff) | |
| download | node-new-85212bb182f555f6d09e0b2f5f78d2d8e19bcef1.tar.gz | |
trace_events: add file pattern cli option
Allow the user to specify the filepath for the trace_events log file
using a template string.
PR-URL: https://github.com/nodejs/node/pull/18480
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Diffstat (limited to 'doc/api/tracing.md')
| -rw-r--r-- | doc/api/tracing.md | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/doc/api/tracing.md b/doc/api/tracing.md index 3a534177a3..4e161faf9c 100644 --- a/doc/api/tracing.md +++ b/doc/api/tracing.md @@ -33,6 +33,15 @@ Running Node.js with tracing enabled will produce log files that can be opened in the [`chrome://tracing`](https://www.chromium.org/developers/how-tos/trace-event-profiling-tool) tab of Chrome. +The logging file is by default called `node_trace.${rotation}.log`, where +`${rotation}` is an incrementing log-rotation id. The filepath pattern can +be specified with `--trace-event-file-pattern` that accepts a template +string that supports `${rotation}` and `${pid}`. For example: + +```txt +node --trace-events-enabled --trace-event-file-pattern '${pid}-${rotation}.log' server.js +``` + Starting with Node 10.0.0, the tracing system uses the same time source as the one used by `process.hrtime()` however the trace-event timestamps are expressed in microseconds, unlike `process.hrtime()` which returns nanoseconds. |