128m: (g=0): rw=randread, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1
...
128m: (g=0): rw=randread, bs=4K-4K/4K-4K, ioengine=sync, iodepth=1
fio 1.57
Starting 32 processes

128m: (groupid=0, jobs=32): err= 0: pid=29064
  read : io=1253.6MB, bw=128340KB/s, iops=32084 , runt= 10002msec
    clat (usec): min=112 , max=9130 , avg=733.36, stdev=101.88
     lat (usec): min=112 , max=9131 , avg=733.47, stdev=101.88
    bw (KB/s) : min= 1848, max= 6163, per=4.23%, avg=5433.53, stdev=66.18
  cpu          : usr=0.35%, sys=0.97%, ctx=321218, majf=0, minf=1045
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued r/w/d: total=320913/0/0, short=0/0/0
     lat (usec): 250=2.73%, 500=28.49%, 750=16.59%, 1000=11.24%
     lat (msec): 2=33.32%, 4=7.57%, 10=0.07%

Run status group 0 (all jobs):
   READ: io=1253.6MB, aggrb=128339KB/s, minb=131419KB/s, maxb=131419KB/s, mint=10002msec, maxt=10002msec

Disk stats (read/write):
  sdb: ios=317186/2, merge=0/5, ticks=299794/1, in_queue=299762, util=99.03%
