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] [12.0% done] [ 10764/ 10394 kb/s] [eta 00m:22s]
Threads: 3: [mmm] [16.0% done] [ 13951/  6760 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [20.0% done] [ 14838/  5499 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [24.0% done] [ 12117/  8074 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [26.9% done] [ 15879/  4116 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [30.8% done] [ 11547/  7577 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [34.6% done] [  6080/ 10355 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [ 11698/  3095 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.7% done] [ 11637/  3245 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.4% done] [ 14895/   667 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.4% done] [  9554/  4270 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [50.0% done] [  2436/  9322 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.7% done] [  6044/  5946 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [55.2% done] [ 11075/   366 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  6951/  2513 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23965, got signal=6
Threads: 2: [m_m] [58.1% done] [  8403/   199 kb/s] [eta 00m:13s]
Threads: 2: [m_m] [61.3% done] [  6211/  2058 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23964, got signal=6
Threads: 1: [__m] [64.5% done] [  3644/  3481 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23966, got signal=6

fio: (groupid=0): err= 0: pid=23964
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=6.6%, 8=92.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.2%, 20=1.0%, 50=11.9%, 100=46.2%
     lat (msec): 250=39.7%, 500=0.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23965
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.4%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=2.3%, 50=9.2%, 100=51.5%
     lat (msec): 250=36.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23966
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.0%, 8=92.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.5%, 20=1.4%, 50=20.0%, 100=26.4%
     lat (msec): 250=50.2%, 500=1.0%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3964/1867, merge=766/65, ticks=47264/24936, in_queue=72196, util=98.29%
0.20user 0.62system 0:21.36elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
424928inputs+189200outputs (0major+2456minor)pagefaults 0swaps