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] [13.0% done] [  5145/ 16355 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [16.7% done] [  9809/  9358 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [21.7% done] [ 12747/  7577 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 11474/  7500 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [  7614/ 10166 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  5233/ 11885 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 10949/  5116 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [ 13231/  3778 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [  8996/  6651 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  7854/  5469 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  7081/  6943 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  5739/  6162 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  7825/  3717 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  5579/  5233 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  8582/  3051 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  9180/   748 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  4685/  3461 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [64.5% done] [  2125/  4754 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31925, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31926, got signal=6
Threads: 1: [m__] [65.6% done] [  2163/  3729 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31924, got signal=6

fio: (groupid=0): err= 0: pid=31924
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.4%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.2%, 20=2.5%, 50=7.6%, 100=43.4%
     lat (msec): 250=45.2%, 500=0.4%, 750=0.2%, 1000=0.3%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31925
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.9%, 8=94.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=6.6%, 100=47.5%
     lat (msec): 250=45.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31926
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.0%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=8.2%, 100=43.6%
     lat (msec): 250=47.2%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3431/2684, merge=574/157, ticks=42800/38320, in_queue=81120, util=99.20%
0.32user 0.39system 0:21.92elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
350640inputs+263448outputs (0major+2464minor)pagefaults 0swaps