[QUESTION] perf annotate: how do we fix the 'total period' feature ?

[Taeung Song]

Hi,

Two problems of perf-annotate were mentioned in recent PATCH reviews
by Milian and Namhyung.

Currently perf-annotate has a '--show-total-period' option
and a 't' key "Toggle total period view" on TUI browser.

However, they actually show the number of samples, not period(Raw number 
of event count of sample).
So it's a different number to the perf report like below.

For example,

  $ perf report --stdio --show-nr-sample --show-total-period -S hex2u64
...
# Overhead       Samples        Period  Command  Shared Object
# ........  ............  ............  .......  .............
#
     3.07%            36      26484668  perf     perf


  $ perf annotate  --stdio --show-total-period -s hex2u64
 Percent |      Source code & Disassembly of perf for cycles:ppp (36 
samples)
-----------------------------------------------------------------------------
         :
         :
         :
         :      Disassembly of section .text:
         :
         :      000000000053ef9e <hex2u64>:
         :      hex2u64():
       0 :        53ef9e:       push   %rbp
       0 :        53ef9f:       mov    %rsp,%rbp
       0 :        53efa2:       sub    $0x30,%rsp
       1 :        53efa6:       callq  424810 
<pthread_attr_setdetachstate@plt+0x10>
       0 :        53efab:       mov    %rdi,-0x28(%rbp)
       2 :        53efaf:       mov    %rsi,-0x30(%rbp)
...

Problems:
  1) the total period of perf-annotate is different from perf-report's
  2) perf-annotate only shows the first column as 'Percent'
     (even though the number of samples for each addr are actually printed)

So we need to just rename it ? ('total period' -> 'samples')

Or,
we should enable perf-annotate to support both features for 'periods' 
and 'samples' ?


Thanks,
Taeung