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=32651
  read : io=4,096MiB, bw=234MiB/s, iops=14,971, runt= 17510msec
    clat (usec): min=10, max=105, avg=14.63, stdev= 2.42
    bw (KiB/s) : min=    0, max=249856, per=97.23%, avg=232915.56, stdev=40491.76
  write: io=4,096MiB, bw=20,552KiB/s, iops=1,284, runt=204076msec
    clat (usec): min=14, max=992K, avg=550.92, stdev=8808.42
    bw (KiB/s) : min=    0, max=80288, per=104.85%, avg=21549.25, stdev=17290.67
  cpu          : usr=32.41%, sys=4.68%, ctx=45666, majf=1, minf=2102309
  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=50.09%, 50=46.05%, 100=0.52%, 250=1.65%, 500=0.24%
     lat (usec): 750=0.12%, 1000=0.15%
     lat (msec): 2=0.22%, 4=0.14%, 10=0.28%, 20=0.24%, 50=0.17%
     lat (msec): 100=0.07%, 250=0.04%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=481
  read : io=4,038MiB, bw=157MiB/s, iops=10,041, runt= 25739msec
    clat (usec): min=2, max=261, avg=15.00, stdev= 3.95
    bw (KiB/s) : min=    0, max=241824, per=97.88%, avg=157258.22, stdev=43419.41
  write: io=1,024MiB, bw=48,789KiB/s, iops=3,049, runt= 21492msec
    clat (usec): min=2, max=392K, avg=25.11, stdev=1532.47
    bw (KiB/s) : min=    0, max=52640, per=97.77%, avg=47704.09, stdev=9555.39
  cpu          : usr=6.61%, sys=0.87%, ctx=1220, majf=0, minf=1114831
  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=258452/65536, short=0/0
     lat (usec): 4=0.01%, 10=8.44%, 20=77.32%, 50=14.22%, 100=0.01%
     lat (usec): 250=0.01%, 500=0.01%
     lat (msec): 500=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=234MiB/s, minb=234MiB/s, maxb=234MiB/s, mint=17510msec, maxt=17510msec
  WRITE: io=4,096MiB, aggrb=20,552KiB/s, minb=20,552KiB/s, maxb=20,552KiB/s, mint=204076msec, maxt=204076msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=157MiB/s, minb=157MiB/s, maxb=157MiB/s, mint=25739msec, maxt=25739msec
  WRITE: io=1,024MiB, aggrb=48,790KiB/s, minb=48,790KiB/s, maxb=48,790KiB/s, mint=21492msec, maxt=21492msec

Disk stats (read/write):
  sda: ios=17251/62903, merge=189/1233629, ticks=229266/126436320, in_queue=126665441, util=93.30%
104.28user 49.11system 11:39.59elapsed 21%CPU (0avgtext+0avgdata 16861728maxresident)k
8390832inputs+18762256outputs (8major+3221115minor)pagefaults 0swaps