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] [13.6% done] [ 14272/  6666 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [ 11617/  8066 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 15124/  4307 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [  6377/ 11319 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 14598/  5108 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 17294/  1410 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 18271/   980 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  6903/  9606 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  8976/  6753 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [ 11462/  2570 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  8972/  3864 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  7223/  5072 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  8704/  3180 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  7692/  2320 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  8932/  1330 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5190/  3851 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12047, got signal=6
Threads: 2: [m_m] [63.3% done] [  5934/  1208 kb/s] [eta 00m:11s]
Threads: 2: [m_m] [66.7% done] [  6113/  1582 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12046, got signal=6
fio: pid=12048, got signal=6

fio: (groupid=0): err= 0: pid=12046
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.1%, 50=7.0%, 100=42.2%
     lat (msec): 250=48.6%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12047
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.0%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.3%, 50=9.4%, 100=48.0%
     lat (msec): 250=40.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12048
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.9%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.2%, 50=9.5%, 100=40.9%
     lat (msec): 250=47.4%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4213/1659, merge=711/220, ticks=51296/25764, in_queue=77056, util=98.43%
0.23user 0.41system 0:21.00elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
458448inputs+155872outputs (0major+2446minor)pagefaults 0swaps