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=4409, got signal=6
Threads: 2
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4410, got signal=6
Threads: 1: [m__] [60.0% done] [  9984/ 63161 kb/s] [eta 00m:02s]
Threads: 1: [F__] [100.0% done] [     0/ 21653 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: [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: [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__] [73.1% done] [  8873/     0 kb/s] [eta 00m:07s]
Threads: 1: [V__] [95.2% done] [ 29652/     0 kb/s] [eta 00m:01s]
Threads: 1: [V__] [100.0% done] [ 31389/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=4408
  read : io=100MiB, bw=4,734KiB/s, runt= 22147msec
    slat (msec): min=    0, max=   39, avg= 0.14, stdev= 2.34
    clat (msec): min=    0, max=  263, avg=25.00, stdev=35.42
    bw (KiB/s) : min=    0, max=32047, per=283.36%, avg=15301.50, stdev=11996.62
  write: io=78,716KiB, bw=4,196KiB/s, runt= 19208msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  143, avg= 0.56, stdev= 5.96
    bw (KiB/s) : min=    0, max=36573, per=127.52%, avg=18286.50, stdev=25861.02
  cpu          : usr=2.80%, sys=1.32%, ctx=3823
  IO depths    : 1=3.7%, 2=54.5%, 4=29.0%, 8=12.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=46.5%, 4=0.0%, 10=15.2%, 20=18.2%, 50=13.4%, 100=4.6%
     lat (msec): 250=1.7%, 500=0.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4409
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=95.2%, 4=2.4%, 8=1.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=87.8%, 4=8.9%, 10=0.7%, 20=0.2%, 50=0.1%, 100=0.2%
     lat (msec): 250=1.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4410
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=90.7%, 4=4.1%, 8=5.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=85.7%, 4=6.0%, 10=1.1%, 20=0.2%, 50=1.5%, 100=1.9%
     lat (msec): 250=3.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=114MiB, aggrb=5,400KiB/s, minb=0KiB/s, maxb=4,734KiB/s, mint=0msec, maxt=22147msec
  WRITE: io=263MiB, aggrb=14,340KiB/s, minb=0KiB/s, maxb=4,196KiB/s, mint=0msec, maxt=22147msec

Disk stats (read/write):
  sda: ios=861/3134, merge=2275/63763, ticks=19760/2217252, in_queue=2239472, util=96.21%
2.62user 0.88system 0:22.72elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2492minor)pagefaults 0swaps