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Subject[PATCH v5 0/3] perf synthetic events
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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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