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* [PATCH v3 0/3] Improvements for kallsyms__parse
@ 2020-05-05 14:36 Ian Rogers
  2020-05-05 14:36 ` [PATCH v3 1/3] perf bench: add kallsyms parsing Ian Rogers
                   ` (2 more replies)
  0 siblings, 3 replies; 4+ messages in thread
From: Ian Rogers @ 2020-05-05 14:36 UTC (permalink / raw)
  To: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
	Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
	Thomas Gleixner, linux-kernel
  Cc: Stephane Eranian, Ian Rogers

kallsyms__parse is called 4 times during perf record startup. Add a
benchmark to measure its performance. Transition it to using the api
io.h buffered reading, improving performance by ~8% or saving ~5% from
perf record start up time.

v3. Fixed a link error report in hex2u64 by jolsa@redhat.com.
v2. Fix the err return value for success, error reported by
    jolsa@redhat.com. Add clean-up for hex2u64.

Ian Rogers (3):
  perf bench: add kallsyms parsing
  lib kallsyms: parse using io api
  lib kallsyms: move hex2u64 out of header

 tools/lib/api/io.h                |  3 ++
 tools/lib/symbol/kallsyms.c       | 86 ++++++++++++++-----------------
 tools/lib/symbol/kallsyms.h       |  2 -
 tools/perf/bench/Build            |  1 +
 tools/perf/bench/bench.h          |  1 +
 tools/perf/bench/kallsyms-parse.c | 75 +++++++++++++++++++++++++++
 tools/perf/builtin-bench.c        |  1 +
 tools/perf/util/symbol.c          | 14 +++++
 8 files changed, 133 insertions(+), 50 deletions(-)
 create mode 100644 tools/perf/bench/kallsyms-parse.c

-- 
2.26.2.526.g744177e7f7-goog


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2020-05-05 14:36 [PATCH v3 0/3] Improvements for kallsyms__parse Ian Rogers
2020-05-05 14:36 ` [PATCH v3 1/3] perf bench: add kallsyms parsing Ian Rogers
2020-05-05 14:36 ` [PATCH v3 2/3] lib kallsyms: parse using io api Ian Rogers
2020-05-05 14:36 ` [PATCH v3 3/3] lib kallsyms: move hex2u64 out of header Ian Rogers

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