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=668, got signal=6
Threads: 2
Threads: 2
Threads: 2: [_mF] [75.0% done] [  1956/ 95516 kb/s] [eta 00m:01s]
Threads: 2: [_FF] [100.0% done] [     0/  2204 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: [_FV] [71.4% done] [  2708/     0 kb/s] [eta 00m:04s]
Threads: 2: [_FV] [84.6% done] [ 17724/     0 kb/s] [eta 00m:02s]
Threads: 2: [_FV] [92.3% done] [ 13400/     0 kb/s] [eta 00m:01s]
Threads: 2: [_FV] [100.0% done] [ 12028/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FV] [100.0% done] [  7520/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FV] [100.0% done] [ 10008/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FV] [100.0% done] [ 13196/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FV] [100.0% done] [  9364/     0 kb/s] [eta 00m:00s]
Threads: 1: [_F_] [100.0% done] [  6416/     0 kb/s] [eta 00m:00s]
Threads: 1: [_V_] [86.4% done] [ 26164/     0 kb/s] [eta 00m:03s]
Threads: 1: [_V_] [100.0% done] [ 32428/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=668
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=96.7%, 4=2.8%, 8=0.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=97.5%, 4=0.9%, 10=1.0%, 20=0.2%, 50=0.2%, 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=669
  read : io=100MiB, bw=4,874KiB/s, runt= 21510msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  315, avg=24.12, stdev=43.20
    bw (KiB/s) : min=    1, max=34390, per=167.49%, avg=16328.45, stdev=14114.31
  write: io=88,284KiB, bw=4,869KiB/s, runt= 18564msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  222, avg= 1.06, stdev=11.03
    bw (KiB/s) : min=    0, max=40287, per=129.04%, avg=20143.50, stdev=28487.21
  cpu          : usr=3.22%, sys=2.01%, ctx=7235
  IO depths    : 1=0.9%, 2=53.9%, 4=30.2%, 8=14.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.3%, 4=0.3%, 10=19.4%, 20=19.8%, 50=7.0%, 100=1.8%
     lat (msec): 250=2.7%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=670
  read : io=100MiB, bw=5,901KiB/s, runt= 17766msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  626, avg=49.49, stdev=65.49
    bw (KiB/s) : min=   22, max=24256, per=97.97%, avg=9551.19, stdev=6063.88
  write: io=92,372KiB, bw=10,157KiB/s, runt=  9312msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  139, avg= 0.79, stdev= 6.46
    bw (KiB/s) : min=    0, max=30661, per=98.21%, avg=15330.50, stdev=21680.60
  cpu          : usr=4.23%, sys=2.12%, ctx=6328
  IO depths    : 1=0.9%, 2=52.0%, 4=30.0%, 8=17.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=47.8%, 4=0.4%, 10=12.1%, 20=14.5%, 50=8.1%, 100=8.5%
     lat (msec): 250=7.8%, 500=0.5%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=200MiB, aggrb=9,749KiB/s, minb=0KiB/s, maxb=5,901KiB/s, mint=17766msec, maxt=21510msec
  WRITE: io=276MiB, aggrb=15,610KiB/s, minb=0KiB/s, maxb=10,157KiB/s, mint=17766msec, maxt=21510msec

Disk stats (read/write):
  sda: ios=2468/2074, merge=901/68440, ticks=43344/2164740, in_queue=2349056, util=98.47%
2.30user 1.10system 0:21.82elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2477minor)pagefaults 0swaps