linux-kernel - [PATCH 0/2] Improvements for kallsyms_

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Date:   Thu, 30 Apr 2020 12:35:55 -0700
From:   Ian Rogers <irogers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org
Cc:     Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: [PATCH 0/2] Improvements for kallsyms__parse

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.

Ian Rogers (2):
  perf bench: add kallsyms parsing
  lib kallsyms: parse using io api

 tools/lib/api/io.h          |  3 ++
 tools/lib/symbol/kallsyms.c | 81 +++++++++++++++++++------------------
 tools/perf/bench/Build      |  1 +
 tools/perf/bench/bench.h    |  1 +
 tools/perf/builtin-bench.c  |  1 +
 5 files changed, 47 insertions(+), 40 deletions(-)

-- 
2.26.2.526.g744177e7f7-goog