[PATCH 0/3] libperf: Add support for scaling counters obtained from the read() system call during multiplexing

Shunsuke Nakamura
2021-08-20T09:46:39Z

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 fixes verbose printing.

The third patch adds a test for the first patch.
This patch is based on Vince's rdpmc_multiplexing.c [1]

[1] https://github.com/deater/perf_event_tests/blob/master/tests/rdpmc/rdpmc_multiplexing.c

Shunsuke Nakamura (3):
libperf: Add processing to scale the counters obtained during the read
() system call when multiplexing
libperf tests: Fix verbose printing
libperf tests: Add test_stat_multiplexing test

tools/lib/perf/evsel.c | 4 +
tools/lib/perf/include/internal/tests.h | 2 +
tools/lib/perf/tests/test-evlist.c | 138 ++++++++++++++++++++++++
3 files changed, 144 insertions(+)

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2.25.1