[Bugs] [Bug 1370092] VERY poor replica write perfomance

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1370092



--- Comment #6 from Badalyan Vyacheslav <v.badalyan at open-bs.ru> ---
[root at xintel2 ~]# perf stat -a -g  -p 110232
^C
 Performance counter stats for process id '110232':

      33604,217420      task-clock (msec)         #    3,467 CPUs utilized     
      (1,90%)
           444 787      context-switches          #    0,013 M/sec             
      (1,90%)
            39 759      cpu-migrations            #    0,001 M/sec             
      (1,90%)
                 0      page-faults               #    0,000 K/sec             
      (1,90%)
    12 270 079 483      cycles                    #    0,365 GHz               
      (1,90%)
     6 796 842 214      stalled-cycles-frontend   #   55,39% frontend cycles
idle     (0,01%)
     5 270 033 500      stalled-cycles-backend    #   42,95% backend  cycles
idle     (0,01%)
     2 911 092 877      instructions              #    0,24  insns per cycle
                                                  #    2,33  stalled cycles per
insn  (0,01%)
       394 494 858      branches                  #   11,739 M/sec             
      (0,00%)
     <not counted>      branch-misses              (0,00%)

       9,692958135 seconds time elapsed

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