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] [ 11312/  9496 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 13775/  7233 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [21.7% done] [  8691/  9325 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [27.3% done] [  7614/ 13573 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 14543/  3628 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 17013/  3206 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 14222/  2795 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  5753/  8834 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [ 15055/   743 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  6428/  6513 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  6343/  5392 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  5957/  7001 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  8362/  2436 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  4981/  6022 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  4803/  5615 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.0% done] [  4729/  3185 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3960, got signal=6
Threads: 2: [_mm] [63.3% done] [  8269/   203 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 2: [_mm] [64.5% done] [  8204/     0 kb/s] [eta 00m:11s]
fio: pid=3962, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3961, got signal=6

fio: (groupid=0): err= 0: pid=3960
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.9%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.0%, 50=7.6%, 100=51.6%
     lat (msec): 250=39.2%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3961
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=7.2%, 8=92.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.2%, 20=1.5%, 50=15.3%, 100=41.0%
     lat (msec): 250=40.4%, 500=1.1%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3962
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=7.7%, 8=91.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.5%, 20=3.1%, 50=11.4%, 100=39.9%
     lat (msec): 250=44.1%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3902/2109, merge=734/179, ticks=45580/31404, in_queue=76972, util=98.08%
0.21user 0.68system 0:21.83elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
400008inputs+214320outputs (0major+2450minor)pagefaults 0swaps