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=12347, got signal=6
Threads: 2
Threads: 2: [m_F] [37.5% done] [  2242/     0 kb/s] [eta 00m:05s]
Threads: 2: [m_F] [40.0% done] [  1048/     0 kb/s] [eta 00m:06s]
Threads: 2: [m_F] [41.7% done] [   408/  3864 kb/s] [eta 00m:07s]
Threads: 2: [F_F] [100.0% done] [     0/ 40132 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [70.0% done] [     0/     0 kb/s] [eta 00m:03s]
Threads: 2: [F_V] [80.0% done] [ 10152/     0 kb/s] [eta 00m:02s]
Threads: 2: [F_V] [90.0% done] [ 18804/     0 kb/s] [eta 00m:01s]
Threads: 2: [F_V] [100.0% done] [ 17952/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [100.0% done] [ 15188/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_V] [100.0% done] [ 22132/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [  7272/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [V__] [79.2% done] [ 16196/     0 kb/s] [eta 00m:05s]
Threads: 1: [V__] [100.0% done] [ 32080/     0 kb/s] [eta 00m:00s]
Threads: 1: [V__] [100.0% done] [ 35320/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=12346
  read : io=100MiB, bw=4,782KiB/s, runt= 21910msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max= 1215, avg=31.98, stdev=103.89
    bw (KiB/s) : min=    6, max=37445, per=120.15%, avg=11626.00, stdev=15072.67
  write: io=93,968KiB, bw=5,106KiB/s, runt= 18844msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  827, avg= 2.96, stdev=36.27
    bw (KiB/s) : min=    0, max=22832, per=52.94%, avg=8209.00, stdev=12695.65
  cpu          : usr=3.89%, sys=1.84%, ctx=4805
  IO depths    : 1=8.5%, 2=54.6%, 4=27.1%, 8=9.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.6%, 4=0.5%, 10=31.2%, 20=6.6%, 50=7.6%, 100=2.6%
     lat (msec): 250=1.0%, 500=1.0%, 750=0.4%, 1000=0.2%, >=2000=0.2%
fio: (groupid=0): err= 0: pid=12347
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=90.6%, 4=6.4%, 8=2.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=86.9%, 4=3.9%, 10=1.4%, 20=2.9%, 50=3.6%, 100=0.7%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12348
  read : io=100MiB, bw=8,190KiB/s, runt= 12802msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  341, avg=29.20, stdev=42.97
    bw (KiB/s) : min=   22, max=24592, per=152.46%, avg=14752.00, stdev=7714.28
  write: io=91,508KiB, bw=13,043KiB/s, runt=  7184msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  120, avg= 0.43, stdev= 4.81
    bw (KiB/s) : min=    0, max=124780, per=402.36%, avg=62390.00, stdev=88232.78
  cpu          : usr=6.03%, sys=3.00%, ctx=3635
  IO depths    : 1=4.1%, 2=59.5%, 4=26.1%, 8=10.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=50.5%, 4=0.6%, 10=23.6%, 20=7.4%, 50=7.2%, 100=7.2%
     lat (msec): 250=3.3%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=202MiB, aggrb=9,676KiB/s, minb=0KiB/s, maxb=8,190KiB/s, mint=12802msec, maxt=21910msec
  WRITE: io=279MiB, aggrb=15,506KiB/s, minb=0KiB/s, maxb=13,043KiB/s, mint=12802msec, maxt=21910msec

Disk stats (read/write):
  sda: ios=1164/2625, merge=7965/68575, ticks=57800/2449452, in_queue=2507964, util=97.74%
2.62user 1.03system 0:22.38elapsed 16%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2472minor)pagefaults 0swaps