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: [Fmm] [30.0% done] [  6452/ 40407 kb/s] [eta 00m:07s]
Threads: 3: [FmF] [33.3% done] [  5560/ 26381 kb/s] [eta 00m:08s]
Threads: 3: [FmF] [50.0% done] [  1655/ 19507 kb/s] [eta 00m:05s]
Threads: 3: [FmF] [50.0% done] [  1093/     0 kb/s] [eta 00m:06s]
Threads: 3: [FmF] [50.0% done] [  1509/     0 kb/s] [eta 00m:07s]
Threads: 3: [FmF] [50.0% done] [  1659/     0 kb/s] [eta 00m:08s]
Threads: 3: [FmF] [50.0% done] [  1627/     0 kb/s] [eta 00m:09s]
Threads: 3: [FmF] [52.6% done] [  1663/     0 kb/s] [eta 00m:09s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13145, got signal=6
Threads: 2: [_mV] [52.4% done] [ 44149/     0 kb/s] [eta 00m:10s]
Threads: 1: [_m_] [60.0% done] [ 46703/  6406 kb/s] [eta 00m:08s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13146, got signal=6

fio: (groupid=0): err= 0: pid=13145
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=89.4%, 4=7.8%, 8=2.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=82.2%, 4=12.5%, 10=1.8%, 20=0.1%, 50=0.2%, 100=1.1%
     lat (msec): 250=1.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13146
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=6.6%, 2=54.7%, 4=8.6%, 8=30.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=52.3%, 4=8.2%, 10=1.8%, 20=2.5%, 50=8.0%, 100=6.0%
     lat (msec): 250=12.1%, 500=8.6%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13147
  read : io=100MiB, bw=8,803KiB/s, runt= 11911msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  254, avg=17.34, stdev=40.99
    bw (KiB/s) : min=    7, max=61008, per=122.12%, avg=15205.50, stdev=23568.73
  write: io=85,660KiB, bw=8,483KiB/s, runt= 10339msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  183, avg= 1.70, stdev=11.46
    bw (KiB/s) : min=    0, max=35756, per=62.83%, avg=15433.33, stdev=18372.59
  cpu          : usr=11.25%, sys=6.65%, ctx=5276
  IO depths    : 1=1.4%, 2=58.9%, 4=27.7%, 8=11.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.5%, 4=16.2%, 10=25.2%, 20=3.2%, 50=1.3%, 100=1.5%
     lat (msec): 250=4.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=141MiB, aggrb=12,451KiB/s, minb=0KiB/s, maxb=8,803KiB/s, mint=11911msec, maxt=11911msec
  WRITE: io=242MiB, aggrb=24,563KiB/s, minb=0KiB/s, maxb=8,483KiB/s, mint=11911msec, maxt=11911msec

Disk stats (read/write):
  cciss!c0d0: ios=2942/2547, merge=494/55114, ticks=29584/1206332, in_queue=1239680, util=96.13%
3.69user 1.70system 0:13.06elapsed 41%CPU (0avgtext+0avgdata 0maxresident)k
349760inputs+496064outputs (0major+2455minor)pagefaults 0swaps