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| author | Raul Silvera <rsilvera@google.com> | 2022-08-15 22:59:22 +0000 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-10-04 08:55:19 -0300 |
| commit | 8012243e62b5e13bded3ce8a3b69d28f8ea694fe (patch) | |
| tree | e41402c23f7a8161f5d211520efb92dd61abf13e /tools/perf/Documentation | |
| parent | 725737e7c21d2d25a4312c2aaa82a52bd03e3126 (diff) | |
| download | lwn-8012243e62b5e13bded3ce8a3b69d28f8ea694fe.tar.gz lwn-8012243e62b5e13bded3ce8a3b69d28f8ea694fe.zip | |
perf inject: Add a command line option to specify build ids.
This commit adds the option --known-build-ids to perf inject.
It allows the user to explicitly specify the build id for a given
path, instead of retrieving it from the current system. This is
useful in cases where a perf.data file is processed on a different
system from where it was collected, or if some of the binaries are
no longer available.
The build ids and paths are specified in pairs in the command line.
Using the file:// specifier, build ids can be loaded from a file
directly generated by perf buildid-list. This is convenient to copy
build ids from one perf.data file to another.
** Example: In this example we use perf record to create two
perf.data files, one with build ids and another without, and use
perf buildid-list and perf inject to copy the build ids from the
first file to the second.
$ perf record ls /tmp
$ perf record --no-buildid -o perf.data.no-buildid ls /tmp
$ perf buildid-list > build-ids.txt
$ perf inject -b --known-build-ids='file://build-ids.txt' \
-i perf.data.no-buildid -o perf.data.buildid
Signed-off-by: Raul Silvera <rsilvera@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220815225922.2118745-1-rsilvera@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-inject.txt | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-inject.txt b/tools/perf/Documentation/perf-inject.txt index ffc293fdf61d..70e2ac3cc91a 100644 --- a/tools/perf/Documentation/perf-inject.txt +++ b/tools/perf/Documentation/perf-inject.txt @@ -27,9 +27,14 @@ OPTIONS --build-ids:: Inject build-ids into the output stream ---buildid-all: +--buildid-all:: Inject build-ids of all DSOs into the output stream +--known-build-ids=:: + Override build-ids to inject using these comma-separated pairs of + build-id and path. Understands file://filename to read these pairs + from a file, which can be generated with perf buildid-list. + -v:: --verbose:: Be more verbose. |