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] [  9224/ 10544 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [17.4% done] [ 16168/  5784 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [20.8% done] [ 10469/  8826 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 12593/  7256 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 12312/  6276 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 14797/  4197 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 12532/  6552 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [  9579/  6792 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  9888/  4551 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  7451/  4340 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  5714/  6898 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  9526/  3941 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  9721/  2896 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  9172/   955 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  6577/  3298 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  7004/  3026 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=10952, got signal=6
Threads: 2: [_mm] [59.4% done] [  2238/  4108 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=10954, got signal=6
Threads: 1: [_m_] [62.5% done] [  7996/     0 kb/s] [eta 00m:12s]
Threads: 1: [_m_] [65.6% done] [  2241/  4421 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=10953, got signal=6

fio: (groupid=0): err= 0: pid=10952
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.4%, 8=94.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=9.8%, 100=57.4%
     lat (msec): 250=32.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=10953
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.3%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=2.7%, 50=22.9%, 100=19.5%
     lat (msec): 250=53.4%, 500=0.7%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=10954
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=6.2%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.7%, 20=2.7%, 50=10.5%, 100=42.2%
     lat (msec): 250=42.9%, 500=0.2%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3698/2437, merge=621/145, ticks=43904/36712, in_queue=80616, util=99.19%
0.18user 0.36system 0:21.98elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
375056inputs+239208outputs (0major+2462minor)pagefaults 0swaps