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=12039
  read : io=4,096MiB, bw=242MiB/s, iops=15,516, runt= 16895msec
    clat (usec): min=10, max=115, avg=12.18, stdev= 1.80
    bw (KiB/s) : min=    0, max=251200, per=97.16%, avg=241218.82, stdev=42856.39
  write: io=4,096MiB, bw=21,279KiB/s, iops=1,329, runt=197105msec
    clat (usec): min=14, max=518K, avg=654.28, stdev=6713.45
    bw (KiB/s) : min=    0, max=67257, per=102.50%, avg=21810.43, stdev=21374.48
  cpu          : usr=19.40%, sys=2.53%, ctx=17816, majf=0, minf=2102312
  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=81.96%, 50=14.67%, 100=0.11%, 250=0.06%, 500=0.03%
     lat (usec): 750=0.01%, 1000=0.02%
     lat (msec): 2=1.14%, 4=1.38%, 10=0.16%, 20=0.11%, 50=0.15%
     lat (msec): 100=0.15%, 250=0.05%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=12230
  read : io=4,039MiB, bw=156MiB/s, iops=9,984, runt= 25891msec
    clat (usec): min=2, max=2,854, avg=17.24, stdev=10.60
    bw (KiB/s) : min=    0, max=234016, per=97.70%, avg=156080.62, stdev=38558.90
  write: io=1,024MiB, bw=48,482KiB/s, iops=3,030, runt= 21628msec
    clat (usec): min=3, max=2,943, avg=22.86, stdev=16.39
    bw (KiB/s) : min=    0, max=50336, per=97.64%, avg=47339.64, stdev=7375.10
  cpu          : usr=7.36%, sys=1.13%, ctx=1503, majf=0, minf=1115982
  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=258506/65536, short=0/0
     lat (usec): 4=0.01%, 10=11.83%, 20=39.63%, 50=48.51%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%, 750=0.01%
     lat (msec): 4=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=242MiB/s, minb=242MiB/s, maxb=242MiB/s, mint=16895msec, maxt=16895msec
  WRITE: io=4,096MiB, aggrb=21,279KiB/s, minb=21,279KiB/s, maxb=21,279KiB/s, mint=197105msec, maxt=197105msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=156MiB/s, minb=156MiB/s, maxb=156MiB/s, mint=25891msec, maxt=25891msec
  WRITE: io=1,024MiB, aggrb=48,482KiB/s, minb=48,482KiB/s, maxb=48,482KiB/s, mint=21628msec, maxt=21628msec

Disk stats (read/write):
  sda: ios=17444/62314, merge=0/1234504, ticks=213726/86951772, in_queue=87165484, util=92.55%
67.40user 29.44system 10:43.01elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
8390824inputs+18771496outputs (33major+3221987minor)pagefaults 0swaps