[PATCH 0/3] perf tools: Fix scalability problem on callchain merging

[Namhyung Kim <namhyung@kernel.org>]

Hello,

Linus reported that perf report was stuck in after "processing time
ordered events".  It turned out that merging/collapsing the callchain
takes most of time to look up a matching callchain.  Since it did a
linear search for the lookup, it took more than 95% of time during the
processing huge file that contains callchains.

This patchset tries to fix the problem by

 1. converting children list to a rbtree
 2. add UI progress window to inform user

With this patch, processing time of 400MB perf.data file went down
from 380s to 20s.

Thanks,
Namhyung


Namhyung Kim (3):
  perf callchain: Convert children list to rbtree
  perf ui/progress: Add new helper functions for progress bar
  perf tools: Show progress on histogram collapsing

 tools/perf/builtin-annotate.c |   2 +-
 tools/perf/builtin-diff.c     |   2 +-
 tools/perf/builtin-report.c   |  10 ++-
 tools/perf/builtin-top.c      |   4 +-
 tools/perf/tests/hists_link.c |   2 +-
 tools/perf/ui/progress.c      |  18 +++++
 tools/perf/ui/progress.h      |  10 +++
 tools/perf/util/callchain.c   | 151 ++++++++++++++++++++++++++++++++----------
 tools/perf/util/callchain.h   |   5 +-
 tools/perf/util/hist.c        |   5 +-
 tools/perf/util/hist.h        |   3 +-
 tools/perf/util/session.c     |  22 +++---
 12 files changed, 173 insertions(+), 61 deletions(-)

-- 
1.7.11.7