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
Threads: 3: [mmm] [14.3% done] [  7386/ 15342 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [  7223/ 12320 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 20333/  1761 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 14919/  5596 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 14899/  3799 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [  9216/  6977 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 12686/  5710 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  8610/  6394 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  6194/  8074 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  9741/  5003 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 13642/     0 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  8407/  3571 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  7549/  4075 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  5910/  4152 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  7362/  2477 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  7057/  1822 kb/s] [eta 00m:11s]
Threads: 3: [mVm] [63.3% done] [  8700/  1960 kb/s] [eta 00m:11s]
Threads: 3: [mVm] [64.5% done] [ 22241/  1492 kb/s] [eta 00m:11s]
Threads: 2: [m_m] [63.6% done] [ 17457/  1732 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18105, got signal=6
Threads: 1: [m__] [66.7% done] [  1838/  4604 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18103, got signal=6

fio: (groupid=0): err= 0: pid=18103
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.1%, 8=95.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.9%, 50=8.3%, 100=38.9%
     lat (msec): 250=48.3%, 500=2.4%, 750=0.7%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18104
  read : io=100MiB, bw=4,961KiB/s, runt= 21067msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    1, max=  238, avg=61.53, stdev=38.95
    bw (KiB/s) : min=   15, max=25157, per=56.81%, avg=6713.70, stdev=6567.18
  write: io=42,872KiB, bw=2,322KiB/s, runt= 18899msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   52, max=  165, avg=111.15, stdev=20.28
    bw (KiB/s) : min=    0, max= 8134, per=66.44%, avg=3832.81, stdev=2931.68
  cpu          : usr=0.32%, sys=0.34%, ctx=7375
  IO depths    : 1=0.1%, 2=0.5%, 4=17.4%, 8=82.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.4%, 10=4.3%, 20=7.8%, 50=19.3%, 100=36.1%
     lat (msec): 250=31.5%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18105
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.2%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.2%, 20=0.9%, 50=6.9%, 100=50.6%
     lat (msec): 250=38.8%, 500=1.1%, 750=0.4%, 1000=0.5%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=237MiB, aggrb=11,818KiB/s, minb=0KiB/s, maxb=4,961KiB/s, mint=0msec, maxt=21067msec
  WRITE: io=104MiB, aggrb=5,769KiB/s, minb=0KiB/s, maxb=2,322KiB/s, mint=0msec, maxt=21067msec

Disk stats (read/write):
  cciss!c0d0: ios=4248/2123, merge=774/185, ticks=44296/36156, in_queue=80440, util=99.08%
0.25user 0.36system 0:22.77elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
486328inputs+213008outputs (0major+2450minor)pagefaults 0swaps