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] [11.1% done] [ 12751/  4148 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [14.3% done] [  8834/ 10449 kb/s] [eta 00m:24s]
Threads: 3: [mmm] [19.2% done] [ 17071/  3018 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [24.0% done] [ 15246/  7493 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [28.0% done] [ 14919/  2957 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 11592/  7069 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 12222/  5133 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [ 12145/  4136 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 11018/  5706 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  8802/  4002 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [ 15627/  1346 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  7322/  5205 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  6251/  5499 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  9599/  2229 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  6223/  3351 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  1866/  6589 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [63.3% done] [  6586/  2625 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=6087, got signal=6
Threads: 2: [m_m] [62.5% done] [  6422/   927 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=6086, got signal=6
Threads: 1: [__m] [65.6% done] [  2493/  3628 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=6090, got signal=6

fio: (groupid=0): err= 0: pid=6086
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.7%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.5%, 50=8.2%, 100=51.3%
     lat (msec): 250=38.7%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=6087
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.7%, 8=93.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.4%, 20=1.5%, 50=7.6%, 100=49.9%
     lat (msec): 250=40.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=6090
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.3%, 50=13.2%, 100=42.1%
     lat (msec): 250=42.8%, 500=1.1%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3643/2286, merge=619/289, ticks=44584/42848, in_queue=87428, util=99.97%
0.22user 0.34system 0:21.97elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
397880inputs+216304outputs (0major+2458minor)pagefaults 0swaps