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=12890, got signal=6
Threads: 2
Threads: 2
Threads: 2: [_mF] [30.0% done] [  1067/     0 kb/s] [eta 00m:07s]
Threads: 2: [_mF] [28.6% done] [  1051/   338 kb/s] [eta 00m:10s]
Threads: 2: [_FF] [100.0% done] [   240/ 57462 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: 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: 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: 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: 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: 2: [_VV] [69.6% done] [ 11381/     0 kb/s] [eta 00m:07s]
Threads: 2: [_VV] [81.0% done] [ 35813/     0 kb/s] [eta 00m:04s]
Threads: 2: [_VV] [90.0% done] [ 27198/     0 kb/s] [eta 00m:02s]
Threads: 2: [_VV] [100.0% done] [ 36206/     0 kb/s] [eta 00m:00s]
Threads: 2: [_VV] [100.0% done] [ 30311/     0 kb/s] [eta 00m:00s]
Threads: 2: [_VV] [100.0% done] [ 30724/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=12890
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=97.8%, 4=1.5%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=97.2%, 4=2.6%, 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%
fio: (groupid=0): err= 0: pid=12891
  read : io=100MiB, bw=4,783KiB/s, runt= 21921msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  922, avg=44.94, stdev=92.82
    bw (KiB/s) : min=   10, max=20815, per=97.47%, avg=9285.20, stdev=7614.85
  write: io=89,156KiB, bw=5,833KiB/s, runt= 15650msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  747, avg= 4.60, stdev=47.55
    bw (KiB/s) : min=    0, max=11377, per=20.74%, avg=3897.67, stdev=6479.22
  cpu          : usr=3.87%, sys=1.81%, ctx=7072
  IO depths    : 1=0.6%, 2=51.8%, 4=30.8%, 8=16.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=45.9%, 4=2.8%, 10=14.0%, 20=21.3%, 50=4.3%, 100=1.7%
     lat (msec): 250=8.1%, 500=1.0%, 750=0.4%, 1000=0.3%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12892
  read : io=100MiB, bw=4,762KiB/s, runt= 22013msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  503, avg=34.21, stdev=55.13
    bw (KiB/s) : min=    0, max=22937, per=128.58%, avg=12248.19, stdev=7591.16
  write: io=95,684KiB, bw=6,269KiB/s, runt= 15628msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   78, avg= 0.65, stdev= 3.90
    bw (KiB/s) : min=    0, max=36990, per=98.42%, avg=18495.00, stdev=26155.88
  cpu          : usr=3.85%, sys=1.78%, ctx=6682
  IO depths    : 1=0.9%, 2=51.6%, 4=31.8%, 8=15.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=46.6%, 4=2.7%, 10=15.8%, 20=21.4%, 50=3.3%, 100=2.5%
     lat (msec): 250=7.1%, 500=0.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=200MiB, aggrb=9,526KiB/s, minb=0KiB/s, maxb=4,783KiB/s, mint=21921msec, maxt=22013msec
  WRITE: io=280MiB, aggrb=18,791KiB/s, minb=0KiB/s, maxb=6,269KiB/s, mint=21921msec, maxt=22013msec

Disk stats (read/write):
  sda: ios=2350/2276, merge=986/69364, ticks=58560/1929768, in_queue=1994856, util=98.86%
2.68user 1.06system 0:22.44elapsed 16%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2481minor)pagefaults 0swaps