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] [12.5% done] [  8475/  9952 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 15582/  4791 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 15758/  3884 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [  8090/ 11425 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [  6424/ 10597 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  4791/ 13073 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [ 13508/  3054 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  7289/  8699 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [  6296/  8224 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [ 11982/  3119 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 11341/  3397 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  8814/  3839 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  6813/  4083 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  9444/  1305 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  5274/  4226 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6024/  3217 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6243/  2981 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1298, got signal=6
Threads: 2: [m_m] [64.5% done] [  3193/  3363 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1297, got signal=6
Threads: 1: [__m] [67.7% done] [  6395/   946 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=1299, got signal=6

fio: (groupid=0): err= 0: pid=1297
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.6%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.8%, 50=9.3%, 100=44.8%
     lat (msec): 250=42.6%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1298
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=3.5%, 8=96.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.7%, 50=10.5%, 100=41.7%
     lat (msec): 250=46.6%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=1299
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.3%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.2%, 50=12.3%, 100=40.5%
     lat (msec): 250=44.9%, 500=1.3%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3654/2458, merge=582/221, ticks=44228/41120, in_queue=85344, util=99.22%
0.28user 0.37system 0:21.81elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
377296inputs+236816outputs (0major+2462minor)pagefaults 0swaps