Messages in this thread | | | From | Shunsuke Nakamura <> | Subject | [PATCH v2 0/2] libperf: Add support for scaling counters obtained from the read() system call during multiplexing | Date | Wed, 22 Sep 2021 19:16:25 +0900 |
| |
This patch series supports counter scaling when perf_evsel__read() obtains a counter using the read() system call during multiplexing.
The first patch adds scaling of counters obtained from the read() system call during multiplexing.
The second patch adds a test for the first patch. This patch is based on Vince's rdpmc_multiplexing.c [1]
--- Changes in v2: - Fix not to divide by zero when counter scaling - Add test to verify that no division by zero occurs
[1] https://github.com/deater/perf_event_tests/blob/master/tests/rdpmc/rdpmc_multiplexing.c
nakamura shunsuke (2): libperf: Add processing to scale the counters obtained during the read() system call when multiplexing libperf tests: Add test_stat_multiplexing test
tools/lib/perf/evsel.c | 6 + tools/lib/perf/tests/test-evlist.c | 183 +++++++++++++++++++++++++++++ 2 files changed, 189 insertions(+)
-- 2.27.0
| |