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] [ 11267/ 10563 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 15769/  4872 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [  6993/ 11304 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [ 11555/  6784 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 13935/  3249 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 12032/  6465 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 13675/  4449 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 13138/  3184 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 10982/  5645 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  2013/ 10982 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  9159/  2962 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  4604/  8269 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  5888/  5132 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  7764/  2985 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  8013/  1956 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  4750/  4266 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=6496, got signal=6
Threads: 2: [m_m] [63.3% done] [  6926/  1598 kb/s] [eta 00m:11s]
Threads: 2: [m_m] [66.7% done] [  6630/   825 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=6495, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=6497, got signal=6

fio: (groupid=0): err= 0: pid=6495
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.3%, 8=94.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.5%, 50=10.0%, 100=45.0%
     lat (msec): 250=43.5%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=6496
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.2%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.7%, 50=9.6%, 100=45.9%
     lat (msec): 250=42.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=6497
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.8%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.5%, 50=9.9%, 100=42.3%
     lat (msec): 250=44.7%, 500=0.8%, 750=0.4%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3688/2331, merge=553/256, ticks=43776/37944, in_queue=81712, util=98.88%
0.32user 0.32system 0:21.44elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
396440inputs+217808outputs (0major+2455minor)pagefaults 0swaps