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=690, got signal=6
Threads: 2
Threads: 2: [F_F] [100.0% done] [   398/ 34421 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: [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] [69.6% done] [  8037/     0 kb/s] [eta 00m:07s]
Threads: 2: [V_V] [81.0% done] [ 28034/     0 kb/s] [eta 00m:04s]
Threads: 2: [V_V] [90.0% done] [ 31677/     0 kb/s] [eta 00m:02s]
Threads: 2: [V_V] [100.0% done] [ 41264/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [100.0% done] [ 38478/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [100.0% done] [ 31341/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=689
  read : io=100MiB, bw=4,861KiB/s, runt= 21569msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  407, avg=31.39, stdev=51.85
    bw (KiB/s) : min=    6, max=29630, per=139.74%, avg=14065.29, stdev=9193.79
  write: io=99,964KiB, bw=6,578KiB/s, runt= 15560msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  211, avg= 0.87, stdev= 9.85
    bw (KiB/s) : min=    0, max=46360, per=122.12%, avg=23180.00, stdev=32781.47
  cpu          : usr=3.99%, sys=1.85%, ctx=7465
  IO depths    : 1=0.9%, 2=52.7%, 4=31.3%, 8=15.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.1%, 4=5.4%, 10=12.8%, 20=21.3%, 50=4.1%, 100=2.0%
     lat (msec): 250=5.9%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=690
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=91.9%, 4=2.6%, 8=5.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=92.7%, 4=0.8%, 10=0.0%, 20=0.1%, 50=0.5%, 100=3.6%
     lat (msec): 250=2.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=691
  read : io=100MiB, bw=4,805KiB/s, runt= 21821msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  382, avg=37.79, stdev=57.90
    bw (KiB/s) : min=   18, max=20897, per=114.36%, avg=11510.56, stdev=7485.56
  write: io=95,804KiB, bw=6,306KiB/s, runt= 15556msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  199, avg= 0.75, stdev= 8.48
    bw (KiB/s) : min=    0, max=28133, per=74.10%, avg=14066.50, stdev=19893.04
  cpu          : usr=3.43%, sys=1.74%, ctx=7579
  IO depths    : 1=0.6%, 2=50.7%, 4=31.3%, 8=17.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.3%, 4=2.2%, 10=11.5%, 20=22.8%, 50=4.2%, 100=2.3%
     lat (msec): 250=7.8%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=209MiB, aggrb=10,065KiB/s, minb=0KiB/s, maxb=4,861KiB/s, mint=21821msec, maxt=21821msec
  WRITE: io=282MiB, aggrb=18,982KiB/s, minb=0KiB/s, maxb=6,578KiB/s, mint=21821msec, maxt=21821msec

Disk stats (read/write):
  sda: ios=2252/2793, merge=988/69100, ticks=32304/2001928, in_queue=2036196, util=98.89%
2.37user 1.05system 0:22.09elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2485minor)pagefaults 0swaps