Messages in this thread | | | From | Jiri Olsa <> | Subject | [PATCH 0/6] perf tools: Add wallclock time conversion support | Date | Thu, 30 Jul 2020 23:39:44 +0200 |
| |
hi, this patchset is based on changes made by David Ahern long time ago. The perf code moved a lot since then, but the idea is the same.
The patchset is adding the ability to display TOD/wallclock timestamp in 'perf script' output and in 'perf data convert --to-ctf' subcommand, so the converted CTF data contain TOD/wallclock timestamps.
It's done by adding new header FEATURE 'CLOCK_DATA' to perf.data, that stores reference times for both TOD/wallclock time and for the clock that perf record is configured to use. These reference times are then used to convert sample's timestamps to TOD/wallclock timestamps.
The feature is available only for recording with clockid specified, because it's the only case where we can get reference time to TOD/wallclock time. We can't do that with perf clock yet.
Also available in here: git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git perf/abs_time
thanks, jirka
--- Jiri Olsa (6): perf tools: Add clockid_name function perf tools: Store clock references for -k/--clockid option perf tools: Move clockid_res_ns under clock struct perf tools: Add support to store time of day in CTF data conversion perf script: Change enum perf_output_field values to be 64 bits perf script: Add tod field to display time of day
tools/perf/Documentation/perf-data.txt | 3 ++ tools/perf/Documentation/perf.data-file-format.txt | 13 +++++++ tools/perf/builtin-data.c | 1 + tools/perf/builtin-record.c | 58 ++++++++++++++++++++++++++++-- tools/perf/builtin-script.c | 195 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---------------------------------- tools/perf/util/data-convert-bt.c | 56 ++++++++++++++++++----------- tools/perf/util/data-convert.h | 1 + tools/perf/util/env.h | 14 +++++++- tools/perf/util/header.c | 120 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--- tools/perf/util/header.h | 1 + tools/perf/util/util.h | 2 ++ 11 files changed, 371 insertions(+), 93 deletions(-)
| |