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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17641, got signal=6
Threads: 2
Threads: 2
Threads: 2: [m_F] [60.0% done] [   472/     0 kb/s] [eta 00m:02s]
Threads: 2: [m_F] [66.7% done] [   263/    55 kb/s] [eta 00m:02s]
Threads: 2: [m_F] [62.5% done] [   259/     0 kb/s] [eta 00m:03s]
Threads: 2: [m_F] [60.0% done] [   342/    98 kb/s] [eta 00m:04s]
Threads: 2: [m_F] [63.6% done] [   429/   354 kb/s] [eta 00m:04s]
Threads: 2: [F_F] [100.0% done] [   366/  9306 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_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_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: [V_V] [68.2% done] [  1654/     0 kb/s] [eta 00m:07s]
Threads: 2: [V_V] [72.7% done] [ 24560/     0 kb/s] [eta 00m:06s]
Threads: 2: [V_V] [89.5% done] [ 33630/     0 kb/s] [eta 00m:02s]
Threads: 2: [V_V] [94.7% done] [ 32480/     0 kb/s] [eta 00m:01s]
Threads: 2: [V_V] [100.0% done] [ 36674/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [100.0% done] [ 33437/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=17640
  read : io=100MiB, bw=4,856KiB/s, runt= 21593msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max= 1327, avg=54.14, stdev=126.25
    bw (KiB/s) : min=    0, max=21160, per=77.10%, avg=7399.64, stdev=8001.01
  write: io=96,632KiB, bw=6,427KiB/s, runt= 15396msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  959, avg= 7.32, stdev=62.76
    bw (KiB/s) : min=    0, max=33144, per=38.93%, avg=7633.50, stdev=13360.41
  cpu          : usr=3.76%, sys=2.20%, ctx=4776
  IO depths    : 1=3.2%, 2=56.2%, 4=28.6%, 8=12.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=47.2%, 4=0.9%, 10=15.8%, 20=17.1%, 50=7.0%, 100=2.3%
     lat (msec): 250=6.8%, 500=1.7%, 750=0.5%, 1000=0.2%, >=2000=0.3%
fio: (groupid=0): err= 0: pid=17641
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=97.7%, 4=1.9%, 8=0.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=98.3%, 4=0.8%, 10=0.1%, 20=0.5%, 50=0.0%, 100=0.0%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17642
  read : io=100MiB, bw=4,798KiB/s, runt= 21851msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  506, avg=34.09, stdev=56.55
    bw (KiB/s) : min=    4, max=22931, per=133.84%, avg=12844.33, stdev=7424.40
  write: io=95,896KiB, bw=6,379KiB/s, runt= 15392msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  210, avg= 0.70, stdev= 9.23
    bw (KiB/s) : min=    0, max=138461, per=353.04%, avg=69230.50, stdev=97906.71
  cpu          : usr=3.39%, sys=2.12%, ctx=4855
  IO depths    : 1=3.2%, 2=58.3%, 4=28.9%, 8=9.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=51.6%, 4=0.1%, 10=13.9%, 20=17.7%, 50=7.4%, 100=2.7%
     lat (msec): 250=6.1%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=200MiB, aggrb=9,597KiB/s, minb=0KiB/s, maxb=4,856KiB/s, mint=21851msec, maxt=21851msec
  WRITE: io=288MiB, aggrb=19,610KiB/s, minb=0KiB/s, maxb=6,427KiB/s, mint=21851msec, maxt=21851msec

Disk stats (read/write):
  sda: ios=2162/2861, merge=897/70668, ticks=41832/2052244, in_queue=2097008, util=98.80%
2.41user 1.22system 0:22.20elapsed 16%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2481minor)pagefaults 0swaps