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 [email protected]. v2. Fix the err return value for success, error reported by [email protected]. 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
