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=19801
  read : io=4,096MiB, bw=228MiB/s, iops=14,610, runt= 17942msec
    clat (usec): min=11, max=124, avg=16.28, stdev= 1.83
    bw (KiB/s) : min=    0, max=247072, per=97.09%, avg=226971.56, stdev=39149.82
  write: io=4,096MiB, bw=18,784KiB/s, iops=1,174, runt=223284msec
    clat (usec): min=15, max=915K, avg=644.24, stdev=10638.40
    bw (KiB/s) : min=    0, max=82112, per=105.38%, avg=19795.00, stdev=19139.06
  cpu          : usr=31.08%, sys=3.74%, ctx=13050, majf=1, minf=2102311
  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=50.42%, 50=45.69%, 100=0.63%, 250=1.29%, 500=0.60%
     lat (usec): 750=0.20%, 1000=0.25%
     lat (msec): 2=0.33%, 4=0.07%, 10=0.14%, 20=0.10%, 50=0.08%
     lat (msec): 100=0.09%, 250=0.08%, 500=0.01%, 750=0.01%, 1000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=20078
  read : io=4,036MiB, bw=156MiB/s, iops=9,967, runt= 25916msec
    clat (usec): min=2, max=230, avg=15.98, stdev= 3.88
    bw (KiB/s) : min=    0, max=238752, per=97.48%, avg=155464.62, stdev=40393.18
  write: io=1,024MiB, bw=48,493KiB/s, iops=3,030, runt= 21623msec
    clat (usec): min=2, max=200K, avg=23.60, stdev=780.14
    bw (KiB/s) : min=    0, max=53472, per=97.76%, avg=47408.95, stdev=8447.23
  cpu          : usr=6.91%, sys=0.95%, ctx=11678, majf=0, minf=1113513
  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=258309/65536, short=0/0
     lat (usec): 4=0.01%, 10=6.84%, 20=72.77%, 50=20.37%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2=0.01%, 250=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=228MiB/s, minb=228MiB/s, maxb=228MiB/s, mint=17942msec, maxt=17942msec
  WRITE: io=4,096MiB, aggrb=18,784KiB/s, minb=18,784KiB/s, maxb=18,784KiB/s, mint=223284msec, maxt=223284msec

Run status group 1 (all jobs):
   READ: io=4,036MiB, aggrb=156MiB/s, minb=156MiB/s, maxb=156MiB/s, mint=25916msec, maxt=25916msec
  WRITE: io=1,024MiB, aggrb=48,495KiB/s, minb=48,495KiB/s, maxb=48,495KiB/s, mint=21623msec, maxt=21623msec

Disk stats (read/write):
  sda: ios=16604/62640, merge=837/1233334, ticks=259052/116296520, in_queue=116555479, util=92.94%
99.49user 48.14system 11:30.56elapsed 21%CPU (0avgtext+0avgdata 16861728maxresident)k
8390352inputs+18757584outputs (7major+3219734minor)pagefaults 0swaps