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] [14.3% done] [ 22281/  1561 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [ 19605/  2265 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [  5800/ 12503 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 13056/  7406 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 11405/  7378 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [  7105/  9294 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  7338/  8821 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [  8944/  6687 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 14423/   923 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  9382/  5428 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 11157/  3026 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  8468/  3534 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  5369/  5389 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  6048/  4702 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  7314/  2316 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  5466/  2977 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21731, got signal=6
Threads: 2: [m_m] [63.3% done] [  3713/  3384 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21730, got signal=6
Threads: 1: [__m] [64.5% done] [  6390/  1004 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21732, got signal=6

fio: (groupid=0): err= 0: pid=21730
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=6.3%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.2%, 20=1.9%, 50=8.6%, 100=51.7%
     lat (msec): 250=36.4%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21731
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.5%, 8=94.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.3%, 20=1.7%, 50=9.4%, 100=52.8%
     lat (msec): 250=35.5%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21732
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=7.2%, 8=92.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.1%, 20=2.2%, 50=12.6%, 100=39.9%
     lat (msec): 250=43.7%, 500=1.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3668/2164, merge=598/174, ticks=41604/32324, in_queue=73928, util=99.09%
0.22user 0.34system 0:21.15elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
401264inputs+213368outputs (0major+2462minor)pagefaults 0swaps