fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
...
fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
Starting 3 threads
Threads: 3
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13819, got signal=6
Threads: 2
Threads: 2: [FF_] [100.0% done] [   232/ 48412 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [VV_] [66.7% done] [     0/     0 kb/s] [eta 00m:07s]
fio: pid=13818, got signal=6
Threads: 1: [V__] [83.3% done] [ 25192/     0 kb/s] [eta 00m:03s]
Threads: 1: [V__] [100.0% done] [ 37988/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=13817
  read : io=100MiB, bw=5,992KiB/s, runt= 17498msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max= 1079, avg=20.00, stdev=66.03
    bw (KiB/s) : min=    7, max=42352, per=261.14%, avg=17434.00, stdev=17917.08
  write: io=99,220KiB, bw=7,077KiB/s, runt= 14356msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  687, avg= 1.79, stdev=23.56
    bw (KiB/s) : min=    0, max=23299, per=55.88%, avg=11649.50, stdev=16474.88
  cpu          : usr=4.80%, sys=2.26%, ctx=3747
  IO depths    : 1=4.6%, 2=58.7%, 4=28.3%, 8=8.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.2%, 4=0.9%, 10=32.5%, 20=6.9%, 50=7.2%, 100=1.5%
     lat (msec): 250=1.3%, 500=0.1%, 750=0.1%, 1000=0.1%, >=2000=0.1%
fio: (groupid=0): err= 0: pid=13818
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=98.0%, 4=1.7%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=99.0%, 4=0.6%, 10=0.0%, 20=0.0%, 50=0.0%, 100=0.0%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13819
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=92.1%, 4=3.1%, 8=4.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=93.4%, 4=0.3%, 10=0.6%, 20=0.1%, 50=0.4%, 100=2.8%
     lat (msec): 250=2.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=111MiB, aggrb=6,676KiB/s, minb=0KiB/s, maxb=5,992KiB/s, mint=0msec, maxt=17498msec
  WRITE: io=285MiB, aggrb=20,847KiB/s, minb=0KiB/s, maxb=7,077KiB/s, mint=0msec, maxt=17498msec

Disk stats (read/write):
  sda: ios=551/2723, merge=2830/70176, ticks=17236/1904344, in_queue=1923792, util=97.66%
2.41user 0.95system 0:17.97elapsed 18%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2478minor)pagefaults 0swaps