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] [13.0% done] [ 13669/  8244 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [16.7% done] [ 16880/  4299 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [21.7% done] [ 11272/  9679 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [25.0% done] [  6833/ 10591 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [  4750/ 12161 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 14911/  3603 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 12292/  5161 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [  9505/  7008 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [  9501/  5324 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [ 13085/  1586 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  7947/  5047 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  8314/  3953 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  8924/  3009 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  9245/  1610 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  6870/  2342 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=24789, got signal=6
Threads: 2: [mm_] [58.1% done] [  4063/  3449 kb/s] [eta 00m:13s]
Threads: 2: [mm_] [61.3% done] [  4648/  4311 kb/s] [eta 00m:12s]
Threads: 2: [mm_] [64.5% done] [  7712/  1301 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=24787, got signal=6
Threads: 1: [_m_] [65.6% done] [  4486/  1928 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=24788, got signal=6

fio: (groupid=0): err= 0: pid=24787
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.1%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.0%, 50=13.8%, 100=41.3%
     lat (msec): 250=42.6%, 500=0.2%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=24788
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.6%, 8=94.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.1%, 50=12.8%, 100=31.7%
     lat (msec): 250=51.8%, 500=0.7%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=24789
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=8.3%, 8=91.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.9%, 50=12.9%, 100=53.7%
     lat (msec): 250=31.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3979/2123, merge=857/171, ticks=47512/34128, in_queue=81632, util=99.98%
0.19user 0.42system 0:21.75elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
408592inputs+205624outputs (0major+2453minor)pagefaults 0swaps