stresser: (g=0): rw=write, bs=16K-16K/16K-16K, ioengine=mmap, iodepth=1
fio: mixed read/write workload with verify. May not work as expected, unless you pre-populated the file
stresser: (g=1): rw=randrw, bs=16K-16K/16K-16K, ioengine=mmap, iodepth=4
Starting 2 processes
stresser: Laying out IO file(s) (1 file(s) / 4096MiB)

stresser: (groupid=0, jobs=1): err= 0: pid=26322
  read : io=4,096MiB, bw=239MiB/s, iops=15,322, runt= 17108msec
    clat (usec): min=10, max=148, avg=12.93, stdev= 2.06
    bw (KiB/s) : min=    0, max=249504, per=97.14%, avg=238162.29, stdev=41700.55
  write: io=4,096MiB, bw=20,436KiB/s, iops=1,277, runt=205231msec
    clat (usec): min=13, max=441K, avg=553.68, stdev=6189.01
    bw (KiB/s) : min=    0, max=82976, per=101.27%, avg=20696.32, stdev=13786.36
  cpu          : usr=30.85%, sys=4.57%, ctx=93506, majf=1, minf=2102342
  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: total=262144/262144, short=0/0
     lat (usec): 20=51.79%, 50=44.63%, 100=0.29%, 250=1.70%, 500=0.22%
     lat (usec): 750=0.10%, 1000=0.13%
     lat (msec): 2=0.22%, 4=0.12%, 10=0.27%, 20=0.19%, 50=0.18%
     lat (msec): 100=0.11%, 250=0.04%, 500=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=26413
  read : io=4,037MiB, bw=159MiB/s, iops=10,150, runt= 25456msec
    clat (usec): min=2, max=244, avg=16.13, stdev= 3.35
    bw (KiB/s) : min=    0, max=239104, per=97.73%, avg=158718.75, stdev=38881.07
  write: io=1,024MiB, bw=49,323KiB/s, iops=3,082, runt= 21259msec
    clat (usec): min=3, max=109, avg=20.19, stdev= 3.58
    bw (KiB/s) : min=    0, max=51424, per=97.35%, avg=48017.12, stdev=7701.47
  cpu          : usr=7.34%, sys=1.28%, ctx=30525, majf=0, minf=1113933
  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: total=258379/65536, short=0/0
     lat (usec): 4=0.01%, 10=2.38%, 20=77.31%, 50=20.30%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=239MiB/s, minb=239MiB/s, maxb=239MiB/s, mint=17108msec, maxt=17108msec
  WRITE: io=4,096MiB, aggrb=20,437KiB/s, minb=20,437KiB/s, maxb=20,437KiB/s, mint=205231msec, maxt=205231msec

Run status group 1 (all jobs):
   READ: io=4,037MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25456msec, maxt=25456msec
  WRITE: io=1,024MiB, aggrb=49,324KiB/s, minb=49,324KiB/s, maxb=49,324KiB/s, mint=21259msec, maxt=21259msec

Disk stats (read/write):
  sda: ios=16677/62931, merge=764/1225087, ticks=246359/107294284, in_queue=107541934, util=93.12%
104.84user 44.53system 12:19.89elapsed 20%CPU (0avgtext+0avgdata 16861120maxresident)k
8390648inputs+18760664outputs (8major+3220183minor)pagefaults 0swaps