Messages in this thread | | | Date | Tue, 14 Apr 2020 22:40:47 -0700 | Subject | [PATCH v5 0/3] perf synthetic events | From | Ian Rogers <> |
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Add a multi-threaded version of the internals synthesize benchmark. It attempts to compute a time per event synthesized, but as it is reading /proc there are issues: - permissions if not run as root - "random" nature of /proc
By default the benchmark is disabled but can be enabled with a flag. It has been useful in gauging the value of multi-threaded improvements not included here as their value appears minimal.
The patch set includes 2 patches that improve synthesis performance and updates the benchmark numbers: https://lore.kernel.org/lkml/20200411064248.247530-1-irogers@google.com/
v4 added a missing test file v3 improved documenation, return values and added testing to the io framework following feedback from namhyung@kernel.org. v2 addressed single threaded synthesize benchmark issues from jolsa@redhat.com https://lore.kernel.org/lkml/20200402154357.107873-1-irogers@google.com/
Ian Rogers (3): perf bench: add a multi-threaded synthesize benchmark tools api: add a lightweight buffered reading api perf synthetic events: Remove use of sscanf from /proc reading
tools/lib/api/io.h | 112 +++++++++++ tools/perf/bench/synthesize.c | 211 +++++++++++++++++--- tools/perf/tests/Build | 1 + tools/perf/tests/api-io.c | 304 +++++++++++++++++++++++++++++ tools/perf/tests/builtin-test.c | 4 + tools/perf/tests/tests.h | 1 + tools/perf/util/synthetic-events.c | 157 ++++++++++----- 7 files changed, 713 insertions(+), 77 deletions(-) create mode 100644 tools/lib/api/io.h create mode 100644 tools/perf/tests/api-io.c
-- 2.26.0.110.g2183baf09c-goog
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