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=5491
  read : io=4,096MiB, bw=238MiB/s, iops=15,254, runt= 17185msec
    clat (usec): min=11, max=334, avg=13.25, stdev= 1.85
    bw (KiB/s) : min=    0, max=246208, per=97.20%, avg=237230.63, stdev=41408.13
  write: io=4,096MiB, bw=19,962KiB/s, iops=1,247, runt=210113msec
    clat (usec): min=16, max=5,682K, avg=546.76, stdev=15694.51
    bw (KiB/s) : min=    0, max=46464, per=107.17%, avg=21392.71, stdev=11911.65
  cpu          : usr=36.39%, sys=4.83%, ctx=53163, majf=1, 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=49.75%, 50=45.90%, 100=1.04%, 250=1.38%, 500=0.07%
     lat (usec): 750=0.04%, 1000=0.04%
     lat (msec): 2=0.32%, 4=0.87%, 10=0.16%, 20=0.10%, 50=0.19%
     lat (msec): 100=0.12%, 250=0.01%, 500=0.01%, 750=0.01%, 1000=0.01%
     lat (msec): >=2000=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=5604
  read : io=4,038MiB, bw=160MiB/s, iops=10,221, runt= 25281msec
    clat (usec): min=2, max=1,184, avg=13.79, stdev= 4.85
    bw (KiB/s) : min=    0, max=243424, per=97.42%, avg=159329.28, stdev=40439.51
  write: io=1,024MiB, bw=50,233KiB/s, iops=3,139, runt= 20874msec
    clat (usec): min=3, max=137, avg=18.13, stdev= 3.89
    bw (KiB/s) : min=    0, max=54048, per=97.60%, avg=49027.60, stdev=8392.20
  cpu          : usr=6.55%, sys=1.09%, ctx=26278, majf=0, minf=1114011
  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=258405/65536, short=0/0
     lat (usec): 4=0.01%, 10=12.70%, 20=80.75%, 50=6.52%, 100=0.01%
     lat (usec): 250=0.01%
     lat (msec): 2=0.01%

Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=238MiB/s, minb=238MiB/s, maxb=238MiB/s, mint=17185msec, maxt=17185msec
  WRITE: io=4,096MiB, aggrb=19,962KiB/s, minb=19,962KiB/s, maxb=19,962KiB/s, mint=210113msec, maxt=210113msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=160MiB/s, minb=160MiB/s, maxb=160MiB/s, mint=25281msec, maxt=25281msec
  WRITE: io=1,024MiB, aggrb=50,235KiB/s, minb=50,235KiB/s, maxb=50,235KiB/s, mint=20874msec, maxt=20874msec

Disk stats (read/write):
  sda: ios=17437/65871, merge=4/1230432, ticks=312759/95650243, in_queue=95962884, util=90.93%
112.09user 40.77system 11:38.73elapsed 21%CPU (0avgtext+0avgdata 16861728maxresident)k
8388896inputs+18760040outputs (2major+3220292minor)pagefaults 0swaps