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] [ 12385/  8143 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [17.4% done] [ 19951/  2279 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 16522/  2868 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 13702/  4494 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 17403/  2064 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  9541/  8252 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [  9472/  8439 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [  8086/  6209 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 14685/  2230 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  7736/  6062 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  8151/  6083 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [ 10930/  1816 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  9102/  2986 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [  8797/  2543 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  7046/  2169 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  7058/  1873 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  4372/  3047 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23998, got signal=6
Threads: 2: [m_m] [64.5% done] [  6651/   292 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23997, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23999, got signal=6

fio: (groupid=0): err= 0: pid=23997
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=6.0%, 8=93.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.3%, 20=2.9%, 50=8.2%, 100=44.6%
     lat (msec): 250=43.0%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23998
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=5.8%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.1%, 20=0.8%, 50=8.1%, 100=53.0%
     lat (msec): 250=37.7%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23999
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.6%, 8=92.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.7%, 50=10.0%, 100=46.0%
     lat (msec): 250=40.5%, 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=4331/1683, merge=679/31, ticks=50732/23432, in_queue=74160, util=97.98%
0.26user 0.57system 0:21.36elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
449584inputs+164704outputs (0major+2447minor)pagefaults 0swaps