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=32622, got signal=6
Threads: 2
Threads: 2: [_mF] [8.6% done] [   620/     0 kb/s] [eta 00m:32s]
Threads: 2: [_mF] [9.5% done] [  1272/   132 kb/s] [eta 00m:38s]
Threads: 2: [_mF] [10.4% done] [  1488/     0 kb/s] [eta 00m:43s]
Threads: 2: [_mF] [23.1% done] [  1676/ 17244 kb/s] [eta 00m:20s]
Threads: 2: [_mF] [50.0% done] [  1840/ 37900 kb/s] [eta 00m:07s]
Threads: 2: [_FF] [100.0% done] [     0/ 27796 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: 1: [_FE] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [_V_] [85.7% done] [ 26654/     0 kb/s] [eta 00m:02s]
Threads: 1: [_V_] [100.0% done] [ 40144/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=32622
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=93.5%, 4=3.3%, 8=2.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=93.0%, 4=2.5%, 10=1.0%, 20=0.2%, 50=0.6%, 100=1.2%
     lat (msec): 250=1.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=32623
  read : io=100MiB, bw=7,571KiB/s, runt= 13837msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max= 1471, avg=39.48, stdev=143.03
    bw (KiB/s) : min=   33, max=39708, per=144.53%, avg=11350.12, stdev=16254.37
  write: io=83,072KiB, bw=7,320KiB/s, runt= 11620msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  991, avg= 3.60, stdev=41.55
    bw (KiB/s) : min=    0, max=17625, per=23.58%, avg=5903.00, stdev=10151.64
  cpu          : usr=4.80%, sys=2.89%, ctx=4082
  IO depths    : 1=1.7%, 2=54.2%, 4=30.9%, 8=13.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.3%, 4=0.0%, 10=26.0%, 20=16.3%, 50=3.6%, 100=1.9%
     lat (msec): 250=1.4%, 500=0.9%, 750=0.6%, 1000=0.3%, >=2000=0.3%
fio: (groupid=0): err= 0: pid=32624
  read : io=0KiB, bw=0KiB/s, runt= 11188msec
  write: io=100MiB, bw=9,402KiB/s, runt= 11152msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=    5, avg= 0.20, stdev= 0.45
    bw (KiB/s) : min=    0, max=126558, per=252.82%, avg=63279.00, stdev=89490.02
  cpu          : usr=7.37%, sys=2.82%, ctx=2754
  IO depths    : 1=0.2%, 2=98.7%, 4=1.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=98.5%, 4=0.8%, 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%

Run status group 0 (all jobs):
   READ: io=104MiB, aggrb=7,853KiB/s, minb=0KiB/s, maxb=7,571KiB/s, mint=11188msec, maxt=13837msec
  WRITE: io=277MiB, aggrb=25,029KiB/s, minb=0KiB/s, maxb=9,402KiB/s, mint=11188msec, maxt=13837msec

Disk stats (read/write):
  sda: ios=1223/1769, merge=507/69064, ticks=14464/1434440, in_queue=1453552, util=96.79%
2.36user 0.97system 0:14.19elapsed 23%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2448minor)pagefaults 0swaps