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=21332
  read : io=4,096MiB, bw=229MiB/s, iops=14,667, runt= 17873msec
    clat (usec): min=11, max=226, avg=13.99, stdev= 2.90
    bw (KiB/s) : min=    0, max=247200, per=97.15%, avg=227996.44, stdev=50239.99
  write: io=4,096MiB, bw=20,483KiB/s, iops=1,280, runt=204770msec
    clat (usec): min=13, max=749K, avg=546.24, stdev=6916.19
    bw (KiB/s) : min=    0, max=79904, per=102.17%, avg=20926.73, stdev=14202.04
  cpu          : usr=31.77%, sys=4.51%, ctx=102353, majf=1, minf=2102338
  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=49.50%, 50=46.90%, 100=0.30%, 250=1.81%, 500=0.16%
     lat (usec): 750=0.09%, 1000=0.12%
     lat (msec): 2=0.18%, 4=0.14%, 10=0.28%, 20=0.22%, 50=0.16%
     lat (msec): 100=0.09%, 250=0.04%, 500=0.01%, 750=0.01%
stresser: (groupid=1, jobs=1): err= 0: pid=21424
  read : io=4,039MiB, bw=159MiB/s, iops=10,178, runt= 25396msec
    clat (usec): min=2, max=476, avg=13.90, stdev= 4.43
    bw (KiB/s) : min=    0, max=246080, per=97.31%, avg=158467.76, stdev=41443.32
  write: io=1,024MiB, bw=49,879KiB/s, iops=3,117, runt= 21022msec
    clat (usec): min=3, max=221, avg=18.02, stdev= 4.73
    bw (KiB/s) : min=    0, max=52640, per=97.72%, avg=48745.40, stdev=9040.41
  cpu          : usr=6.35%, sys=0.84%, ctx=2298, majf=0, minf=1114169
  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=258484/65536, short=0/0
     lat (usec): 4=0.01%, 10=10.04%, 20=81.25%, 50=8.64%, 100=0.04%
     lat (usec): 250=0.02%, 500=0.01%


Run status group 0 (all jobs):
   READ: io=4,096MiB, aggrb=229MiB/s, minb=229MiB/s, maxb=229MiB/s, mint=17873msec, maxt=17873msec
  WRITE: io=4,096MiB, aggrb=20,483KiB/s, minb=20,483KiB/s, maxb=20,483KiB/s, mint=204770msec, maxt=204770msec

Run status group 1 (all jobs):
   READ: io=4,039MiB, aggrb=159MiB/s, minb=159MiB/s, maxb=159MiB/s, mint=25396msec, maxt=25396msec
  WRITE: io=1,024MiB, aggrb=49,881KiB/s, minb=49,881KiB/s, maxb=49,881KiB/s, mint=21022msec, maxt=21022msec

Disk stats (read/write):
  sda: ios=16675/72082, merge=765/1224658, ticks=252597/133474883, in_queue=133727365, util=93.50%
107.25user 44.62system 13:01.38elapsed 19%CPU (0avgtext+0avgdata 16861152maxresident)k
8390640inputs+18764160outputs (8major+3220610minor)pagefaults 0swaps