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=4112, got signal=6
Threads: 2
Threads: 2
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: [_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] [68.2% done] [   932/     0 kb/s] [eta 00m:07s]
Threads: 2: [_VV] [72.7% done] [ 24516/     0 kb/s] [eta 00m:06s]
Threads: 2: [_VV] [89.5% done] [ 33760/     0 kb/s] [eta 00m:02s]
Threads: 2: [_VV] [94.7% done] [ 28160/     0 kb/s] [eta 00m:01s]
Threads: 2: [_VV] [100.0% done] [ 38452/     0 kb/s] [eta 00m:00s]
Threads: 2: [_VV] [100.0% done] [ 31380/     0 kb/s] [eta 00m:00s]
Threads: 1: [__V] [100.0% done] [ 29972/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=4112
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=97.4%, 4=2.5%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=97.4%, 4=2.4%, 10=0.0%, 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=4113
  read : io=100MiB, bw=4,883KiB/s, runt= 21470msec
    slat (msec): min=    0, max=    1, avg= 0.01, stdev= 0.12
    clat (msec): min=    0, max=  342, avg=34.73, stdev=53.86
    bw (KiB/s) : min=   12, max=23126, per=137.99%, avg=13293.00, stdev=7393.21
  write: io=93,648KiB, bw=6,329KiB/s, runt= 15151msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  102, avg= 0.44, stdev= 4.26
    bw (KiB/s) : min=    0, max=129441, per=323.38%, avg=64720.50, stdev=91528.61
  cpu          : usr=3.56%, sys=2.09%, ctx=4865
  IO depths    : 1=1.9%, 2=56.0%, 4=30.0%, 8=12.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=50.3%, 4=0.4%, 10=13.9%, 20=17.4%, 50=8.7%, 100=3.1%
     lat (msec): 250=5.4%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4114
  read : io=100MiB, bw=4,816KiB/s, runt= 21769msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  458, avg=32.62, stdev=55.59
    bw (KiB/s) : min=   14, max=31362, per=128.18%, avg=12347.21, stdev=9598.70
  write: io=98MiB, bw=6,770KiB/s, runt= 15144msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   91, avg= 0.43, stdev= 2.93
    bw (KiB/s) : min=    0, max=54134, per=135.24%, avg=27067.00, stdev=38278.52
  cpu          : usr=3.90%, sys=1.84%, ctx=4746
  IO depths    : 1=3.0%, 2=58.3%, 4=29.4%, 8=9.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=50.0%, 4=1.1%, 10=15.8%, 20=17.3%, 50=7.9%, 100=1.0%
     lat (msec): 250=6.0%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=200MiB, aggrb=9,633KiB/s, minb=0KiB/s, maxb=4,883KiB/s, mint=21470msec, maxt=21769msec
  WRITE: io=289MiB, aggrb=20,014KiB/s, minb=0KiB/s, maxb=6,770KiB/s, mint=21470msec, maxt=21769msec

Disk stats (read/write):
  sda: ios=2156/2990, merge=849/70915, ticks=47004/1919504, in_queue=1983556, util=98.61%
2.50user 1.21system 0:22.08elapsed 16%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2498minor)pagefaults 0swaps