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] [ 11389/  7342 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [16.7% done] [  8382/  9776 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 15205/  6172 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 13027/  6424 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [  7436/ 10756 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 11299/  7077 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [  8586/  8764 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [  5749/  8232 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 13173/  4030 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [ 11596/  3294 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  6209/  6192 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  7964/  4104 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  9029/  2950 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  5302/  4234 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  8756/  1796 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [62.1% done] [  8216/  1251 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29886, got signal=6
Threads: 2: [_mm] [63.3% done] [  5867/  2401 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29887, got signal=6
Threads: 1: [__m] [64.5% done] [  5115/  2234 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29888, got signal=6

fio: (groupid=0): err= 0: pid=29886
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.1%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.6%, 20=1.2%, 50=7.2%, 100=53.6%
     lat (msec): 250=36.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29887
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.8%, 8=93.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=3.3%, 50=8.2%, 100=49.1%
     lat (msec): 250=37.9%, 500=0.5%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29888
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=7.4%, 8=92.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=3.5%, 50=13.1%, 100=45.6%
     lat (msec): 250=36.0%, 500=0.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3889/2223, merge=468/90, ticks=43424/33948, in_queue=77364, util=98.81%
0.52user 0.41system 0:21.42elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
390520inputs+223768outputs (0major+2453minor)pagefaults 0swaps