[PATCHSET 0/7] perf diff: Fix and improve output ordering (v2)

[Namhyung Kim <namhyung@kernel.org>]

Hello,

This patchset improves perf diff output to sort by baseline and then
next columns in turn.  And fix -o/--order option behavior too.

 * changes in v2)
  - pass fmt arg to ->cmp, ->collapse, ->sort callbacks (Jiri)
  - add Acked-by from Jiri

The patch 1-3 are resend.  The patch 4-5 are preparation and the patch
6-7 are the main change.


Before:

  # Baseline/0  Delta/1  Delta/2  Shared Object      Symbol
  # ..........  .......  .......  .................  ..........................................
  #
        32.75%   +0.28%   -0.83%  libc-2.20.so       [.] malloc
        31.50%   -0.74%   -0.23%  libc-2.20.so       [.] _int_free
        22.98%   +0.51%   +0.52%  libc-2.20.so       [.] _int_malloc
         5.70%   +0.28%   +0.30%  libc-2.20.so       [.] free
         4.38%   -0.21%   +0.25%  a.out              [.] main
         1.32%   -0.15%   +0.05%  a.out              [.] free@plt
         1.31%   +0.03%   -0.06%  a.out              [.] malloc@plt
         0.01%   -0.01%   -0.01%  [kernel.kallsyms]  [k] native_write_msr_safe
         0.01%                    [kernel.kallsyms]  [k] scheduler_tick
         0.01%            -0.00%  [kernel.kallsyms]  [k] native_read_msr_safe
                          +0.01%  [kernel.kallsyms]  [k] _raw_spin_lock_irqsave
                 +0.01%   +0.01%  [kernel.kallsyms]  [k] apic_timer_interrupt
                          +0.01%  [kernel.kallsyms]  [k] intel_pstate_timer_func
                 +0.01%           [kernel.kallsyms]  [k] perf_adjust_freq_unthr_context.part.82
                 +0.01%           [kernel.kallsyms]  [k] read_tsc
                          +0.01%  [kernel.kallsyms]  [k] timekeeping_update.constprop.8
    
After:

  # Baseline/0  Delta/1  Delta/2  Shared Object      Symbol
  # ..........  .......  .......  .................  ..........................................
  #
        32.75%   +0.28%   -0.83%  libc-2.20.so       [.] malloc
        31.50%   -0.74%   -0.23%  libc-2.20.so       [.] _int_free
        22.98%   +0.51%   +0.52%  libc-2.20.so       [.] _int_malloc
         5.70%   +0.28%   +0.30%  libc-2.20.so       [.] free
         4.38%   -0.21%   +0.25%  a.out              [.] main
         1.32%   -0.15%   +0.05%  a.out              [.] free@plt
         1.31%   +0.03%   -0.06%  a.out              [.] malloc@plt
         0.01%   -0.01%   -0.01%  [kernel.kallsyms]  [k] native_write_msr_safe
         0.01%                    [kernel.kallsyms]  [k] scheduler_tick
         0.01%            -0.00%  [kernel.kallsyms]  [k] native_read_msr_safe
                 +0.01%   +0.01%  [kernel.kallsyms]  [k] apic_timer_interrupt
                 +0.01%           [kernel.kallsyms]  [k] read_tsc
                 +0.01%           [kernel.kallsyms]  [k] perf_adjust_freq_unthr_context.part.82
                          +0.01%  [kernel.kallsyms]  [k] intel_pstate_timer_func
                          +0.01%  [kernel.kallsyms]  [k] _raw_spin_lock_irqsave
                          +0.01%  [kernel.kallsyms]  [k] timekeeping_update.constprop.8


You can get this from 'perf/diff-sort-v2' branch on my tree:

  git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git


Any comments are welcome, thanks
Namhyung


Namhyung Kim (7):
  perf diff: Fix to sort by baseline field by default
  perf diff: Get rid of hists__compute_resort()
  perf diff: Print diff result more precisely
  perf diff: Introduce fmt_to_data_file() helper
  perf tools: Pass struct perf_hpp_fmt to its callbacks
  perf diff: Fix output ordering to honor next column
  perf diff: Fix -o/--order option behavior

 tools/perf/builtin-diff.c | 252 +++++++++++++++++++++++++++++++++-------------
 tools/perf/ui/hist.c      |  12 ++-
 tools/perf/util/hist.c    |   6 +-
 tools/perf/util/hist.h    |   9 +-
 tools/perf/util/sort.c    |  37 ++++++-
 5 files changed, 232 insertions(+), 84 deletions(-)

-- 
2.1.3