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] [12.5% done] [ 13349/  8602 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [17.4% done] [ 11601/  9240 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 14002/  5453 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 15819/  3884 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [  9577/  8541 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [ 15758/  2852 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 10918/  6550 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 12210/  2929 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [ 10727/  4794 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  5944/  7289 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 11044/  3758 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  8265/  4213 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  9829/  1475 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  6802/  3336 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  5855/  3799 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.1% done] [  5298/  3084 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  7334/  1861 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12438, got signal=6
Threads: 2: [_mm] [64.5% done] [  2539/  3640 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12439, got signal=6
Threads: 1: [__m] [65.6% done] [  5046/  2271 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12440, got signal=6

fio: (groupid=0): err= 0: pid=12438
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.2%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=10.0%, 100=52.8%
     lat (msec): 250=36.6%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12439
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.6%, 8=93.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=3.8%, 50=8.4%, 100=45.7%
     lat (msec): 250=41.2%, 500=0.3%, 750=0.2%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12440
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=4.0%, 8=95.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=0.5%, 50=9.7%, 100=44.4%
     lat (msec): 250=43.4%, 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=3939/2178, merge=789/137, ticks=47056/33816, in_queue=80868, util=98.09%
0.29user 0.46system 0:21.83elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
406528inputs+207760outputs (0major+2450minor)pagefaults 0swaps