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] [ 11393/ 11840 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [19.0% done] [ 19983/     0 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [23.8% done] [ 18271/  3925 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [28.6% done] [ 15753/  3969 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [33.3% done] [ 15871/  3620 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [36.4% done] [  9753/  8366 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [39.1% done] [  7688/  6330 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [  9509/  5804 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [  9412/  5633 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  8415/  6137 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [52.0% done] [ 10518/  3070 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  7166/  4474 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  7203/  4218 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  5869/  4104 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  7842/  1700 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5462/  2774 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14649, got signal=6
Threads: 2: [m_m] [63.3% done] [  2448/  3725 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14648, got signal=6
Threads: 1: [__m] [64.5% done] [  1545/  4868 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=14650, got signal=6

fio: (groupid=0): err= 0: pid=14648
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=3.9%, 8=95.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.2%, 50=7.5%, 100=51.4%
     lat (msec): 250=39.8%, 500=0.0%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=14649
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=3.7%, 8=95.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.2%, 50=10.9%, 100=50.9%
     lat (msec): 250=37.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=14650
  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=0.1%, 20=0.1%, 50=13.6%, 100=41.2%
     lat (msec): 250=43.2%, 500=0.9%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3414/2218, merge=662/134, ticks=43616/29808, in_queue=73420, util=99.09%
0.20user 0.34system 0:21.37elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
409248inputs+205344outputs (0major+2466minor)pagefaults 0swaps