hi,
trying to speedup DWARF unwind report code by factoring
related code:
- caching sample's registers access
- keep dso data file descriptor open for the
life of the dso object
- replace dso cache code by mapping dso data file
directly for the life of the dso object
The speedup is mainly for libunwind unwind. The libdw will benefit
mainly from cached registers access, because it handles dso data
accesses by itself.. and anyway it's still faster ;-).
Also reachable in here:
git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
perf/core_unwind_speedup
thanks,
jirka
Cc: Corey Ashford <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Cc: Jean Pihet <[email protected]>
Signed-off-by: Jiri Olsa <[email protected]>
---
Jiri Olsa (3):
perf tools: Cache register accesses for unwind processing
perf tools: Cache dso data file descriptor
perf tools: Replace dso data cache with mapped data
tools/perf/tests/dso-data.c | 7 ++++
tools/perf/util/dso.c | 200
+++++++++++++++++++++++++++---------------------------------------------------------------------
tools/perf/util/dso.h | 14 ++-----
tools/perf/util/event.h | 5 +++
tools/perf/util/perf_regs.c | 10 ++++-
tools/perf/util/perf_regs.h | 4 +-
tools/perf/util/unwind-libunwind.c | 2 -
7 files changed, 83 insertions(+), 159 deletions(-)
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