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] [15.0% done] [ 18066/  2929 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [19.0% done] [ 15582/  5316 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [22.7% done] [ 14996/  3030 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 13032/  6780 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 11507/  5450 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 16697/   866 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 14069/  2684 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 10317/  5128 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  8806/  4612 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  9408/  5731 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 11641/  2440 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  9330/  3750 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  8981/  3282 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  7276/  2688 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  4116/  5092 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  4974/  3986 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  8736/   613 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23672, got signal=6
Threads: 2: [m_m] [64.5% done] [  2591/  3563 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23673, got signal=6
Threads: 1: [m__] [67.7% done] [  4132/  2326 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23671, got signal=6

fio: (groupid=0): err= 0: pid=23671
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.5%, 8=95.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.1%, 50=10.0%, 100=32.6%
     lat (msec): 250=54.1%, 500=1.2%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23672
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.1%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.4%, 50=9.3%, 100=48.9%
     lat (msec): 250=40.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23673
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.6%, 8=93.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.5%, 50=8.3%, 100=48.2%
     lat (msec): 250=40.9%, 500=0.2%, 750=0.3%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4162/1835, merge=597/149, ticks=51760/27068, in_queue=78820, util=99.13%
0.20user 0.40system 0:21.58elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
448608inputs+165320outputs (0major+2450minor)pagefaults 0swaps