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
Threads: 3
Threads: 3: [mFm] [27.3% done] [  2384/     0 kb/s] [eta 00m:08s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5136, got signal=6
Threads: 2: [_Fm] [28.6% done] [   752/ 56923 kb/s] [eta 00m:10s]
Threads: 2: [_Fm] [27.8% done] [   652/   296 kb/s] [eta 00m:13s]
Threads: 2: [_Fm] [30.0% done] [  2228/     0 kb/s] [eta 00m:14s]
Threads: 2: [_Fm] [35.0% done] [  1872/  5688 kb/s] [eta 00m:13s]
Threads: 2: [_Fm] [34.8% done] [   864/     0 kb/s] [eta 00m:15s]
Threads: 2: [_Fm] [36.0% done] [   780/     0 kb/s] [eta 00m:16s]
Threads: 2: [_Fm] [43.5% done] [  1212/ 11044 kb/s] [eta 00m:13s]
Threads: 2: [_Fm] [52.4% done] [   920/ 12812 kb/s] [eta 00m:10s]
Threads: 2: [_Fm] [63.2% done] [   724/ 12624 kb/s] [eta 00m:07s]
Threads: 2: [_Fm] [61.9% done] [   760/     0 kb/s] [eta 00m:08s]
Threads: 2: [_Fm] [63.6% done] [  1888/     0 kb/s] [eta 00m:08s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [_FF] [100.0% done] [   576/  5860 kb/s] [eta 00m:00s]
fio: pid=5138, got signal=6
Threads: 1: [_V_] [69.6% done] [   452/     0 kb/s] [eta 00m:07s]
Threads: 1: [_V_] [77.3% done] [ 10936/     0 kb/s] [eta 00m:05s]
Threads: 1: [_V_] [90.0% done] [ 21032/     0 kb/s] [eta 00m:02s]
Threads: 1: [_V_] [100.0% done] [ 22453/     0 kb/s] [eta 00m:00s]
Threads: 1: [_V_] [100.0% done] [ 18632/     0 kb/s] [eta 00m:00s]
Threads: 1: [_V_] [100.0% done] [ 16672/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=5136
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=93.5%, 4=2.3%, 8=3.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=92.6%, 4=1.2%, 10=1.0%, 20=0.5%, 50=0.4%, 100=0.2%
     lat (msec): 250=1.0%, 500=1.8%, 750=1.0%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5137
  read : io=100MiB, bw=4,763KiB/s, runt= 22014msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  411, avg=31.58, stdev=51.08
    bw (KiB/s) : min=    6, max=22955, per=245.85%, avg=15230.62, stdev=7799.43
  write: io=99,612KiB, bw=6,335KiB/s, runt= 16100msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  355, avg= 1.25, stdev=16.29
    bw (KiB/s) : min=    0, max=102277, per=377.36%, avg=65653.33, stdev=56984.10
  cpu          : usr=4.43%, sys=2.00%, ctx=5906
  IO depths    : 1=10.5%, 2=46.6%, 4=31.2%, 8=11.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.5%, 4=1.2%, 10=17.7%, 20=15.3%, 50=6.0%, 100=7.1%
     lat (msec): 250=2.0%, 500=1.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5138
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=75.5%, 4=5.8%, 8=18.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=69.6%, 4=5.6%, 10=0.9%, 20=0.1%, 50=2.3%, 100=3.1%
     lat (msec): 250=5.4%, 500=9.2%, 750=2.8%, 1000=0.7%, >=2000=0.1%

Run status group 0 (all jobs):
   READ: io=130MiB, aggrb=6,195KiB/s, minb=0KiB/s, maxb=4,763KiB/s, mint=0msec, maxt=22014msec
  WRITE: io=267MiB, aggrb=17,398KiB/s, minb=0KiB/s, maxb=6,335KiB/s, mint=0msec, maxt=22014msec

Disk stats (read/write):
  sda: ios=1562/2597, merge=621/62763, ticks=44604/2640620, in_queue=2871380, util=97.84%
2.62user 0.87system 0:22.43elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2494minor)pagefaults 0swaps