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=2031, got signal=6
Threads: 2
Threads: 2: [_Fm] [10.0% done] [  1630/  1035 kb/s] [eta 00m:27s]
Threads: 2: [_Fm] [10.8% done] [  1161/     0 kb/s] [eta 00m:33s]
Threads: 2: [_Fm] [25.0% done] [  1506/ 18428 kb/s] [eta 00m:15s]
Threads: 2: [_Fm] [35.3% done] [  1103/ 14085 kb/s] [eta 00m:11s]
Threads: 2: [_Fm] [35.0% done] [  1448/     0 kb/s] [eta 00m:13s]
Threads: 2: [_Fm] [47.1% done] [  1220/ 14936 kb/s] [eta 00m:09s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=2033, got signal=6
Threads: 1: [_F_] [100.0% done] [   244/ 32500 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: [_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: [_F_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [_V_] [78.3% done] [ 14832/     0 kb/s] [eta 00m:05s]
Threads: 1: [_V_] [100.0% done] [ 38792/     0 kb/s] [eta 00m:00s]
Threads: 1: [_V_] [100.0% done] [ 31947/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=2031
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=95.8%, 4=1.8%, 8=2.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=95.8%, 4=0.9%, 10=0.2%, 20=0.6%, 50=0.1%, 100=0.1%
     lat (msec): 250=2.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=2032
  read : io=100MiB, bw=4,974KiB/s, runt= 21078msec
    clat (msec): min=    0, max=  154, avg=12.83, stdev=12.20
    bw (KiB/s) : min=    1, max=39194, per=482.04%, avg=29423.50, stdev=14912.47
  write: io=100MiB, bw=5,804KiB/s, runt= 18064msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   14, avg= 0.32, stdev= 1.03
    bw (KiB/s) : min=    0, max=117170, per=364.09%, avg=58585.00, stdev=82851.70
  cpu          : usr=4.25%, sys=1.71%, ctx=4760
  IO depths    : 1=3.2%, 2=60.7%, 4=28.3%, 8=7.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=50.1%, 4=1.2%, 10=24.5%, 20=16.2%, 50=7.2%, 100=0.5%
     lat (msec): 250=0.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=2033
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=85.2%, 4=2.8%, 8=11.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=84.8%, 4=0.2%, 10=0.0%, 20=0.1%, 50=0.4%, 100=3.4%
     lat (msec): 250=4.1%, 500=4.3%, 750=1.8%, 1000=0.5%, >=2000=0.1%

Run status group 0 (all jobs):
   READ: io=123MiB, aggrb=6,104KiB/s, minb=0KiB/s, maxb=4,974KiB/s, mint=0msec, maxt=21078msec
  WRITE: io=277MiB, aggrb=16,091KiB/s, minb=0KiB/s, maxb=5,804KiB/s, mint=0msec, maxt=21078msec

Disk stats (read/write):
  sda: ios=1359/3660, merge=360/66915, ticks=20316/2364160, in_queue=2407312, util=96.83%
2.42user 0.84system 0:21.45elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2492minor)pagefaults 0swaps