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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=28266, got signal=6
Threads: 2
Threads: 2
Threads: 2: [m_F] [60.0% done] [   404/     0 kb/s] [eta 00m:02s]
Threads: 2: [m_F] [66.7% done] [   160/   128 kb/s] [eta 00m:02s]
Threads: 2: [m_F] [62.5% done] [   112/     0 kb/s] [eta 00m:03s]
Threads: 2: [m_F] [66.7% done] [   472/ 10088 kb/s] [eta 00m:03s]
Threads: 2: [F_F] [100.0% done] [     0/  1365 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [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: [F_V] [66.7% done] [     0/     0 kb/s] [eta 00m:05s]
fio: pid=28267, got signal=6
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [V__] [83.3% done] [ 21121/     0 kb/s] [eta 00m:03s]
Threads: 1: [V__] [100.0% done] [ 38217/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=28265
  read : io=100MiB, bw=6,073KiB/s, runt= 17262msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max= 1073, avg=33.84, stdev=113.13
    bw (KiB/s) : min=    0, max=38993, per=187.33%, avg=12026.38, stdev=16689.03
  write: io=94,488KiB, bw=6,670KiB/s, runt= 14504msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  959, avg= 3.12, stdev=40.69
    bw (KiB/s) : min=    0, max=132284, per=173.45%, avg=35926.75, stdev=64460.23
  cpu          : usr=4.50%, sys=2.64%, ctx=4953
  IO depths    : 1=1.0%, 2=51.6%, 4=32.1%, 8=15.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.1%, 4=6.8%, 10=13.6%, 20=22.0%, 50=5.4%, 100=0.6%
     lat (msec): 250=1.6%, 500=0.8%, 750=0.4%, 1000=0.4%, >=2000=0.1%
fio: (groupid=0): err= 0: pid=28266
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=97.9%, 4=1.9%, 8=0.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=98.6%, 4=1.1%, 10=0.1%, 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=28267
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=94.6%, 4=2.2%, 8=2.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=95.0%, 4=0.7%, 10=0.1%, 20=0.1%, 50=0.2%, 100=1.0%
     lat (msec): 250=1.9%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=106MiB, aggrb=6,420KiB/s, minb=0KiB/s, maxb=6,073KiB/s, mint=0msec, maxt=17262msec
  WRITE: io=287MiB, aggrb=20,713KiB/s, minb=0KiB/s, maxb=6,670KiB/s, mint=0msec, maxt=17262msec

Disk stats (read/write):
  sda: ios=1223/2426, merge=385/70811, ticks=19456/1859276, in_queue=1879792, util=98.32%
2.40user 1.08system 0:17.60elapsed 19%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2498minor)pagefaults 0swaps