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=12337, got signal=6
Threads: 2
Threads: 2
Threads: 2: [m_m] [60.0% done] [  7012/ 98840 kb/s] [eta 00m:02s]
Threads: 2: [m_m] [57.1% done] [  7316/  3964 kb/s] [eta 00m:03s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12336, got signal=6
Threads: 1: [__F] [100.0% done] [   492/ 25728 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] [69.0% done] [   120/     0 kb/s] [eta 00m:09s]
Threads: 1: [__V] [80.8% done] [ 20084/     0 kb/s] [eta 00m:05s]
Threads: 1: [__V] [100.0% done] [ 33036/     0 kb/s] [eta 00m:00s]
Threads: 1: [__V] [100.0% done] [ 36076/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=12336
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=85.7%, 4=5.6%, 8=8.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=86.0%, 4=0.2%, 10=0.3%, 20=0.6%, 50=7.1%, 100=3.1%
     lat (msec): 250=0.7%, 500=0.5%, 750=1.0%, 1000=0.3%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12337
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=97.0%, 4=2.9%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=98.4%, 4=1.3%, 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=12338
  read : io=100MiB, bw=4,415KiB/s, runt= 23734msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  671, avg=31.09, stdev=68.14
    bw (KiB/s) : min=    3, max=41447, per=263.34%, avg=12966.93, stdev=15968.40
  write: io=93,152KiB, bw=4,659KiB/s, runt= 20472msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  519, avg= 3.16, stdev=29.68
    bw (KiB/s) : min=    0, max=36532, per=82.62%, avg=11820.00, stdev=17133.01
  cpu          : usr=3.20%, sys=1.43%, ctx=5400
  IO depths    : 1=1.3%, 2=50.9%, 4=31.7%, 8=16.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=45.5%, 4=1.5%, 10=16.1%, 20=18.6%, 50=12.5%, 100=1.6%
     lat (msec): 250=2.3%, 500=1.2%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=111MiB, aggrb=4,924KiB/s, minb=0KiB/s, maxb=4,415KiB/s, mint=23734msec, maxt=23734msec
  WRITE: io=279MiB, aggrb=14,307KiB/s, minb=0KiB/s, maxb=4,659KiB/s, mint=23734msec, maxt=23734msec

Disk stats (read/write):
  sda: ios=1515/3649, merge=446/67453, ticks=24216/2442336, in_queue=2489576, util=96.30%
2.32user 0.84system 0:24.47elapsed 12%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2507minor)pagefaults 0swaps