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: [mmm] [12.5% done] [ 14372/  5286 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 14039/  5034 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 12271/  5189 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 14982/  2104 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 16481/   959 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 10402/  7107 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [  6582/  9862 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [ 12292/  2694 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [   898/ 15583 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  5010/  8858 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [ 10349/     0 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  6802/  5892 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  3551/  8939 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  4599/  5814 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  3998/  6651 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  2612/  7050 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [59.4% done] [  4030/  4368 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8334, got signal=6
Threads: 2: [m_m] [62.5% done] [  2198/  6107 kb/s] [eta 00m:12s]
Threads: 2: [m_V] [63.6% done] [  8517/   325 kb/s] [eta 00m:12s]
Threads: 2: [m_V] [62.9% done] [ 18944/   613 kb/s] [eta 00m:13s]
Threads: 2: [m_V] [63.9% done] [ 17964/   166 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8333, got signal=6

fio: (groupid=0): err= 0: pid=8333
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.5%, 4=29.8%, 8=67.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.7%, 4=0.4%, 10=1.9%, 20=5.6%, 50=15.3%, 100=27.0%
     lat (msec): 250=41.4%, 500=5.7%, 750=1.1%, 1000=0.6%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8334
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=2.7%, 4=32.3%, 8=64.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=1.2%, 10=1.9%, 20=5.8%, 50=17.2%, 100=29.1%
     lat (msec): 250=43.0%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8335
  read : io=99MiB, bw=4,461KiB/s, runt= 23359msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  626, avg=74.40, stdev=58.76
    bw (KiB/s) : min=    7, max=19644, per=52.98%, avg=5020.49, stdev=5008.53
  write: io=40,144KiB, bw=1,950KiB/s, runt= 21071msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    3, max=  538, avg=91.04, stdev=82.38
    bw (KiB/s) : min=    0, max= 8343, per=51.38%, avg=3255.33, stdev=2623.27
  cpu          : usr=0.24%, sys=0.50%, ctx=8123
  IO depths    : 1=0.3%, 2=1.5%, 4=33.7%, 8=64.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.5%, 10=2.1%, 20=12.0%, 50=31.6%, 100=20.2%
     lat (msec): 250=31.1%, 500=1.8%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=211MiB, aggrb=9,476KiB/s, minb=0KiB/s, maxb=4,461KiB/s, mint=23359msec, maxt=23359msec
  WRITE: io=127MiB, aggrb=6,336KiB/s, minb=0KiB/s, maxb=1,950KiB/s, mint=23359msec, maxt=23359msec

Disk stats (read/write):
  sda: ios=3517/2456, merge=623/397, ticks=41736/103328, in_queue=145060, util=99.06%
0.28user 0.34system 0:24.43elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2488minor)pagefaults 0swaps