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| author | Teng Long <dyroneteng@gmail.com> | 2022-08-12 02:56:45 (GMT) |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2022-08-12 04:05:00 (GMT) |
| commit | 050d0dc241376a5db083f24e739d5ecabcfaf2dc (patch) | |
| tree | 126965c3d138489a0b5d72d323dd91169f3649e1 /Documentation/technical | |
| parent | 9dd64cb4d310986dd7b8ca7fff92f9b61e0bd21a (diff) | |
| download | git-050d0dc241376a5db083f24e739d5ecabcfaf2dc.zip git-050d0dc241376a5db083f24e739d5ecabcfaf2dc.tar.gz git-050d0dc241376a5db083f24e739d5ecabcfaf2dc.tar.bz2 | |
api-trace2.txt: print config key-value pair
It's supported to print "interesting" config key-value paire
to tr2 log by setting "GIT_TRACE2_CONFIG_PARAMS" environment
variable and the "trace2.configparam" config, let's add the
related docs in Documentaion/technical/api-trace2.txt.
Signed-off-by: Teng Long <dyroneteng@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'Documentation/technical')
| -rw-r--r-- | Documentation/technical/api-trace2.txt | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt index 77a150b..38d0878 100644 --- a/Documentation/technical/api-trace2.txt +++ b/Documentation/technical/api-trace2.txt @@ -1207,6 +1207,37 @@ at offset 508. This example also shows that thread names are assigned in a racy manner as each thread starts and allocates TLS storage. +Config (def param) Events:: + + Dump "interesting" config values to trace2 log. ++ +We can optionally emit configuration events, see +`trace2.configparams` in linkgit:git-config[1] for how to enable +it. ++ +---------------- +$ git config color.ui auto +---------------- ++ +Then, mark the config `color.ui` as "interesting" config with +`GIT_TRACE2_CONFIG_PARAMS`: ++ +---------------- +$ export GIT_TRACE2_PERF_BRIEF=1 +$ export GIT_TRACE2_PERF=~/log.perf +$ export GIT_TRACE2_CONFIG_PARAMS=color.ui +$ git version +... +$ cat ~/log.perf +d0 | main | version | | | | | ... +d0 | main | start | | 0.001642 | | | /usr/local/bin/git version +d0 | main | cmd_name | | | | | version (version) +d0 | main | def_param | | | | | color.ui:auto +d0 | main | data | r0 | 0.002100 | 0.002100 | fsync | fsync/writeout-only:0 +d0 | main | data | r0 | 0.002126 | 0.002126 | fsync | fsync/hardware-flush:0 +d0 | main | exit | | 0.002142 | | | code:0 +d0 | main | atexit | | 0.002161 | | | code:0 +---------------- == Future Work === Relationship to the Existing Trace Api (api-trace.txt) |