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
Threads: 3
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14462, got signal=6
Threads: 2: [F_m] [75.0% done] [  4072/ 82088 kb/s] [eta 00m:01s]
Threads: 2: [F_F] [100.0% done] [     0/  8604 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]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14461, got signal=6
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] [81.0% done] [ 20944/     0 kb/s] [eta 00m:04s]
Threads: 1: [__V] [100.0% done] [ 31824/     0 kb/s] [eta 00m:00s]
Threads: 1: [__V] [100.0% done] [ 36024/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=14461
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=2.0%, 2=96.4%, 4=1.6%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=97.7%, 4=1.9%, 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=14462
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=89.6%, 4=4.2%, 8=5.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=82.6%, 4=9.1%, 10=0.8%, 20=0.0%, 50=0.3%, 100=1.9%
     lat (msec): 250=4.5%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=14463
  read : io=100MiB, bw=5,330KiB/s, runt= 19669msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  455, avg=24.14, stdev=51.01
    bw (KiB/s) : min=   10, max=38505, per=293.68%, avg=16681.17, stdev=16020.89
  write: io=93,656KiB, bw=5,815KiB/s, runt= 16492msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   63, avg= 0.48, stdev= 2.73
    bw (KiB/s) : min=    0, max=70918, per=130.68%, avg=23665.67, stdev=40921.74
  cpu          : usr=4.92%, sys=2.34%, ctx=4688
  IO depths    : 1=1.4%, 2=55.5%, 4=30.6%, 8=12.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=45.7%, 4=3.9%, 10=22.5%, 20=17.5%, 50=5.7%, 100=1.4%
     lat (msec): 250=2.6%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=107MiB, aggrb=5,680KiB/s, minb=0KiB/s, maxb=5,330KiB/s, mint=19669msec, maxt=19669msec
  WRITE: io=285MiB, aggrb=18,109KiB/s, minb=0KiB/s, maxb=5,815KiB/s, mint=19669msec, maxt=19669msec

Disk stats (read/write):
  sda: ios=1338/3156, merge=522/69500, ticks=19708/2162988, in_queue=2183724, util=95.94%
2.83user 1.10system 0:20.03elapsed 19%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2491minor)pagefaults 0swaps