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=21376, got signal=6
Threads: 2: [_FF] [100.0% done] [  1224/124380 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [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=21377, got signal=6
Threads: 1: [__V] [100.0% done] [ 49623/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=21376
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=3.6%, 2=81.9%, 4=7.6%, 8=6.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=76.8%, 4=13.1%, 10=2.2%, 20=0.2%, 50=0.7%, 100=6.7%
     lat (msec): 250=0.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21377
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=9.9%, 2=83.3%, 4=3.7%, 8=3.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=84.7%, 4=10.4%, 10=0.8%, 20=0.1%, 50=0.4%, 100=3.0%
     lat (msec): 250=0.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21378
  read : io=100MiB, bw=9,071KiB/s, runt= 11558msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  110, avg=13.27, stdev=25.01
    bw (KiB/s) : min=    6, max=62392, per=239.05%, avg=24920.86, stdev=25507.46
  write: io=76,404KiB, bw=7,641KiB/s, runt= 10239msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   95, avg= 0.34, stdev= 4.13
    bw (KiB/s) : min=    0, max=132816, per=249.71%, avg=66408.00, stdev=93915.09
  cpu          : usr=8.76%, sys=5.30%, ctx=7804
  IO depths    : 1=33.1%, 2=30.3%, 4=23.2%, 8=13.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=59.7%, 4=9.8%, 10=19.7%, 20=3.4%, 50=0.2%, 100=6.7%
     lat (msec): 250=0.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=115MiB, aggrb=10,425KiB/s, minb=0KiB/s, maxb=9,071KiB/s, mint=11558msec, maxt=11558msec
  WRITE: io=260MiB, aggrb=26,594KiB/s, minb=0KiB/s, maxb=7,641KiB/s, mint=11558msec, maxt=11558msec

Disk stats (read/write):
  cciss!c0d0: ios=1400/3054, merge=1758/63298, ticks=53740/1170600, in_queue=1229940, util=97.39%
3.70user 1.67system 0:11.88elapsed 45%CPU (0avgtext+0avgdata 0maxresident)k
286240inputs+531880outputs (0major+2456minor)pagefaults 0swaps