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=1378, got signal=6
Threads: 2
Threads: 2: [m_F] [60.0% done] [   964/ 29376 kb/s] [eta 00m:02s]
Threads: 2: [F_F] [100.0% done] [     0/ 10712 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [70.0% done] [  1516/     0 kb/s] [eta 00m:03s]
Threads: 2: [F_V] [80.0% done] [ 16224/     0 kb/s] [eta 00m:02s]
Threads: 2: [F_V] [90.0% done] [ 12704/     0 kb/s] [eta 00m:01s]
Threads: 2: [F_V] [100.0% done] [ 14204/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [100.0% done] [ 14169/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [100.0% done] [ 13188/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [100.0% done] [ 16388/     0 kb/s] [eta 00m:00s]
Threads: 1: [F_E] [100.0% done] [  9020/     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__] [80.0% done] [ 20464/     0 kb/s] [eta 00m:05s]
Threads: 1: [V__] [100.0% done] [ 40560/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=1377
  read : io=100MiB, bw=4,653KiB/s, runt= 22534msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  447, avg=21.61, stdev=48.01
    bw (KiB/s) : min=    0, max=42877, per=186.53%, avg=17869.18, stdev=18272.33
  write: io=95,428KiB, bw=4,929KiB/s, runt= 19824msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  303, avg= 1.04, stdev=12.71
    bw (KiB/s) : min=    0, max=19484, per=65.21%, avg=9742.00, stdev=13777.27
  cpu          : usr=3.66%, sys=1.62%, ctx=5295
  IO depths    : 1=2.2%, 2=55.6%, 4=30.4%, 8=11.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.9%, 4=0.7%, 10=25.8%, 20=14.9%, 50=5.8%, 100=1.2%
     lat (msec): 250=1.9%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1378
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=95.6%, 4=1.3%, 8=2.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=95.3%, 4=1.0%, 10=0.0%, 20=0.1%, 50=0.4%, 100=2.3%
     lat (msec): 250=0.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1379
  read : io=100MiB, bw=7,273KiB/s, runt= 14413msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  357, avg=41.71, stdev=51.18
    bw (KiB/s) : min=    6, max=22377, per=113.28%, avg=10852.11, stdev=6466.64
  write: io=97,492KiB, bw=14,944KiB/s, runt=  6680msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  105, avg= 0.47, stdev= 4.87
    bw (KiB/s) : min=    0, max=39022, per=130.60%, avg=19511.00, stdev=27592.72
  cpu          : usr=5.19%, sys=2.61%, ctx=4073
  IO depths    : 1=0.9%, 2=53.5%, 4=31.3%, 8=14.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.4%, 4=0.2%, 10=13.3%, 20=12.0%, 50=12.0%, 100=5.6%
     lat (msec): 250=7.0%, 500=0.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=206MiB, aggrb=9,580KiB/s, minb=0KiB/s, maxb=7,273KiB/s, mint=14413msec, maxt=22534msec
  WRITE: io=282MiB, aggrb=14,939KiB/s, minb=0KiB/s, maxb=14,944KiB/s, mint=14413msec, maxt=22534msec

Disk stats (read/write):
  sda: ios=2346/2721, merge=989/69319, ticks=34900/2640508, in_queue=2677588, util=98.04%
2.45user 0.96system 0:22.88elapsed 14%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2481minor)pagefaults 0swaps