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=15472
  read : io=4,096MiB, bw=236MiB/s, iops=15,117, runt= 17340msec
    clat (usec): min=11, max=208, avg=13.80, stdev= 2.43
    bw (KiB/s) : min=    0, max=247520, per=97.11%, avg=234903.77, stdev=41355.10
  write: io=4,096MiB, bw=19,566KiB/s, iops=1,222, runt=214360msec
    clat (usec): min=15, max=711K, avg=586.06, stdev=8777.65
    bw (KiB/s) : min=    0, max=78816, per=104.80%, avg=20505.89, stdev=17014.38
  cpu          : usr=30.50%, sys=4.38%, ctx=41609, majf=1, minf=2102310
  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=50.17%, 50=45.93%, 100=0.56%, 250=1.67%, 500=0.26%
     lat (usec): 750=0.12%, 1000=0.13%
     lat (msec): 2=0.20%, 4=0.15%, 10=0.29%, 20=0.22%, 50=0.18%
     lat (msec): 100=0.08%, 250=0.04%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=15775
  read : io=4,038MiB, bw=159MiB/s, iops=10,147, runt= 25465msec
    clat (usec): min=2, max=243, avg=15.84, stdev= 3.78
    bw (KiB/s) : min=    0, max=243648, per=97.74%, avg=158694.90, stdev=38966.63
  write: io=1,024MiB, bw=49,323KiB/s, iops=3,082, runt= 21259msec
    clat (usec): min=3, max=108, avg=20.26, stdev= 3.95
    bw (KiB/s) : min=    0, max=52096, per=97.45%, avg=48068.47, stdev=7650.77
  cpu          : usr=6.43%, sys=0.87%, ctx=894, majf=0, minf=1115120
  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=258413/65536, short=0/0
     lat (usec): 4=0.01%, 10=4.67%, 20=73.88%, 50=21.43%, 100=0.01%
     lat (usec): 250=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=236MiB/s, minb=236MiB/s, maxb=236MiB/s, mint=17340msec, maxt=17340msec
  WRITE: io=4,096MiB, aggrb=19,566KiB/s, minb=19,566KiB/s, maxb=19,566KiB/s, mint=214360msec, maxt=214360msec

Run status group 1 (all jobs):
   READ: io=4,038MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25465msec, maxt=25465msec
  WRITE: io=1,024MiB, aggrb=49,324KiB/s, minb=49,324KiB/s, maxb=49,324KiB/s, mint=21259msec, maxt=21259msec

Disk stats (read/write):
  sda: ios=17226/63798, merge=215/1232610, ticks=255933/132618661, in_queue=132874441, util=93.69%
105.51user 51.88system 13:00.75elapsed 20%CPU (0avgtext+0avgdata 16861712maxresident)k
8390352inputs+18761144outputs (7major+3221531minor)pagefaults 0swaps