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] [13.6% done] [ 13471/  8074 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 15838/  3758 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [  8118/ 11425 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 13817/  5304 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 10244/  7545 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [34.8% done] [  5810/ 13226 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 10709/  5287 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 12584/  5039 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [ 16274/     0 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  8220/  4071 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 13368/  1280 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  7646/  4258 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  6944/  3665 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [ 11291/  1029 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  6070/  3193 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  7850/  1541 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6556/  1944 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12955, got signal=6
Threads: 2: [m_m] [64.5% done] [  3291/  3128 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12956, got signal=6
Threads: 1: [m__] [67.7% done] [  5560/  1443 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12954, got signal=6

fio: (groupid=0): err= 0: pid=12954
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.4%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.4%, 20=2.6%, 50=11.2%, 100=38.3%
     lat (msec): 250=45.8%, 500=0.6%, 750=0.6%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12955
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.8%, 8=94.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.2%, 50=10.4%, 100=47.7%
     lat (msec): 250=39.8%, 500=0.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12956
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.0%, 8=94.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.2%, 50=9.4%, 100=45.4%
     lat (msec): 250=43.7%, 500=0.3%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=4158/1782, merge=724/109, ticks=49948/29240, in_queue=79180, util=98.99%
0.44user 0.40system 0:21.55elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
440640inputs+173648outputs (0major+2450minor)pagefaults 0swaps