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] [ 22021/   463 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 13498/  7984 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 14752/  6727 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 16957/  4283 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [28.0% done] [ 18726/     0 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 13939/  6410 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 13414/  2440 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 11258/  5234 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [ 13548/  2432 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [  6229/  8212 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.1% done] [  5623/  5294 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.9% done] [  7516/  5015 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.6% done] [  7992/  3205 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [57.1% done] [  6703/  2627 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  6647/  3372 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15887, got signal=6
Threads: 2: [mm_] [60.0% done] [  6495/  1712 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15886, got signal=6
Threads: 1: [m__] [61.3% done] [  1358/  4925 kb/s] [eta 00m:12s]
Threads: 1: [m__] [66.7% done] [  1382/  4462 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15885, got signal=6

fio: (groupid=0): err= 0: pid=15885
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=8.1%, 8=91.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.2%, 20=2.3%, 50=20.5%, 100=35.1%
     lat (msec): 250=40.5%, 500=1.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15886
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.8%, 8=95.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=8.4%, 100=53.8%
     lat (msec): 250=36.7%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15887
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.6%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.7%, 20=2.0%, 50=7.0%, 100=60.8%
     lat (msec): 250=29.4%, 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=3736/1828, merge=889/184, ticks=43712/22692, in_queue=66392, util=97.89%
0.22user 0.51system 0:21.24elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
444600inputs+169624outputs (0major+2457minor)pagefaults 0swaps