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=16297, got signal=6
Threads: 2
Threads: 2
Threads: 2: [_Fm] [60.0% done] [   356/     0 kb/s] [eta 00m:02s]
Threads: 2: [_Fm] [57.1% done] [   276/     0 kb/s] [eta 00m:03s]
Threads: 2: [_Fm] [55.6% done] [   788/   164 kb/s] [eta 00m:04s]
Threads: 2: [_Fm] [60.0% done] [   448/   136 kb/s] [eta 00m:04s]
Threads: 2: [_Vm] [58.3% done] [ 14756/     0 kb/s] [eta 00m:05s]
Threads: 2: [_Vm] [57.1% done] [ 31632/     0 kb/s] [eta 00m:06s]
Threads: 2: [_Vm] [60.0% done] [ 28436/     0 kb/s] [eta 00m:06s]
Threads: 1: [__m] [58.8% done] [ 25332/   200 kb/s] [eta 00m:07s]
Threads: 1: [__m] [68.8% done] [   308/ 13444 kb/s] [eta 00m:05s]
Threads: 1: [__m] [66.7% done] [   404/     0 kb/s] [eta 00m:06s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=16299, got signal=6

fio: (groupid=0): err= 0: pid=16297
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=97.8%, 4=1.7%, 8=0.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=96.7%, 4=2.5%, 10=0.3%, 20=0.3%, 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=16298
  read : io=100MiB, bw=10,382KiB/s, runt= 10098msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  316, avg=19.81, stdev=35.46
    bw (KiB/s) : min=   37, max=33679, per=194.93%, avg=21715.62, stdev=12729.92
  write: io=98,436KiB, bw=15,908KiB/s, runt=  6336msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  182, avg= 0.69, stdev= 8.00
    bw (KiB/s) : min=    0, max=128942, per=134.90%, avg=64471.00, stdev=91175.76
  cpu          : usr=7.92%, sys=4.32%, ctx=3472
  IO depths    : 1=2.0%, 2=57.1%, 4=30.2%, 8=10.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=50.4%, 4=0.7%, 10=22.1%, 20=14.7%, 50=9.1%, 100=1.6%
     lat (msec): 250=0.7%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=16299
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=83.3%, 4=5.0%, 8=11.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=82.6%, 4=2.4%, 10=0.2%, 20=0.2%, 50=1.3%, 100=0.4%
     lat (msec): 250=2.7%, 500=4.4%, 750=4.1%, 1000=1.0%, >=2000=0.3%

Run status group 0 (all jobs):
   READ: io=107MiB, aggrb=11,140KiB/s, minb=0KiB/s, maxb=10,382KiB/s, mint=0msec, maxt=10098msec
  WRITE: io=289MiB, aggrb=47,793KiB/s, minb=0KiB/s, maxb=15,908KiB/s, mint=0msec, maxt=10098msec

Disk stats (read/write):
  sda: ios=1279/1427, merge=437/51793, ticks=27736/1562376, in_queue=1745780, util=98.94%
2.50user 1.01system 0:13.33elapsed 26%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2465minor)pagefaults 0swaps