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] [ 10869/ 11125 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 15014/  5205 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [ 11280/  8265 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [25.0% done] [  6741/ 12267 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 13572/  5335 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 12523/  4262 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  9196/  7850 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 12885/  3961 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  7403/  7574 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  9476/  5286 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 11483/  2295 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [ 10418/  1198 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [ 10012/  1881 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  3900/  6469 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  6530/  3230 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  4876/  4230 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [  6643/  1844 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13317, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13319, got signal=6
Threads: 1: [_m_] [62.5% done] [  4628/  1653 kb/s] [eta 00m:12s]
Threads: 1: [_m_] [67.7% done] [  5627/  2173 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13318, got signal=6

fio: (groupid=0): err= 0: pid=13317
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.6%, 8=95.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.9%, 50=5.4%, 100=49.8%
     lat (msec): 250=43.0%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13318
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=8.2%, 8=91.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.2%, 10=0.4%, 20=3.8%, 50=14.1%, 100=37.0%
     lat (msec): 250=42.7%, 500=0.8%, 750=0.2%, 1000=0.3%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13319
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=4.5%, 8=95.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.1%, 20=1.4%, 50=6.2%, 100=52.0%
     lat (msec): 250=39.4%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3735/2264, merge=698/92, ticks=45504/36796, in_queue=82300, util=98.79%
0.35user 0.35system 0:21.61elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
383160inputs+230920outputs (0major+2454minor)pagefaults 0swaps