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=304
  read : io=4,096MiB, bw=239MiB/s, iops=15,300, runt= 17133msec
    clat (usec): min=11, max=148, avg=13.04, stdev= 1.74
    bw (KiB/s) : min=    0, max=247520, per=97.19%, avg=237935.54, stdev=41640.75
  write: io=4,096MiB, bw=9,279KiB/s, iops=579, runt=452012msec
    clat (usec): min=33, max=1,084K, avg=1476.72, stdev=14072.34
    bw (KiB/s) : min=    0, max=26784, per=105.04%, avg=9746.33, stdev=4747.25
  cpu          : usr=18.22%, sys=2.35%, ctx=17166, majf=1, minf=2102316
  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=49.77%, 50=45.04%, 100=1.91%, 250=0.14%, 500=0.40%
     lat (usec): 750=0.01%, 1000=0.01%
     lat (msec): 2=0.03%, 4=0.09%, 10=0.70%, 20=1.13%, 50=0.43%
     lat (msec): 100=0.26%, 250=0.07%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): 2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=533
  read : io=4,038MiB, bw=155MiB/s, iops=9,946, runt= 25979msec
    clat (usec): min=2, max=333, avg=17.05, stdev= 3.75
    bw (KiB/s) : min=    0, max=232192, per=97.58%, avg=155294.15, stdev=38272.02
  write: io=1,024MiB, bw=48,259KiB/s, iops=3,016, runt= 21728msec
    clat (usec): min=3, max=828, avg=21.80, stdev= 5.15
    bw (KiB/s) : min=    0, max=50528, per=97.54%, avg=47074.18, stdev=7523.30
  cpu          : usr=6.12%, sys=0.86%, ctx=7237, majf=0, minf=1113999
  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=258402/65536, short=0/0
     lat (usec): 4=0.01%, 10=1.64%, 20=68.41%, 50=29.86%, 100=0.07%
     lat (usec): 250=0.01%, 500=0.01%, 1000=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=239MiB/s, minb=239MiB/s, maxb=239MiB/s, mint=17133msec, maxt=17133msec
  WRITE: io=4,096MiB, aggrb=9,279KiB/s, minb=9,279KiB/s, maxb=9,279KiB/s, mint=452012msec, maxt=452012msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=155MiB/s, minb=155MiB/s, maxb=155MiB/s, mint=25979msec, maxt=25979msec
  WRITE: io=1,024MiB, aggrb=48,260KiB/s, minb=48,260KiB/s, maxb=48,260KiB/s, mint=21728msec, maxt=21728msec

Disk stats (read/write):
  sda: ios=15825/61667, merge=1615/1234815, ticks=638363/145845152, in_queue=146483407, util=95.21%
109.98user 50.89system 16:13.36elapsed 16%CPU (0avgtext+0avgdata 16861728maxresident)k
8390944inputs+18760904outputs (8major+3221321minor)pagefaults 0swaps