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] [ 14132/  5709 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [ 15432/  6564 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [22.7% done] [  9408/ 10132 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 13548/  4868 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 11991/  7391 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [  8781/  8972 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 11551/  6316 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [  1976/ 11315 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  9008/  7257 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  8643/  5023 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  4218/  9892 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [ 10412/  2879 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  8594/  2721 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  8639/  1919 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  6534/  2864 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  4771/  3367 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  5865/  2749 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21770, got signal=6
Threads: 2: [mm_] [64.5% done] [  6894/   268 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21769, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21768, got signal=6

fio: (groupid=0): err= 0: pid=21768
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=6.9%, 8=92.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.6%, 20=2.3%, 50=10.1%, 100=43.2%
     lat (msec): 250=42.0%, 500=1.2%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21769
  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=0.2%, 20=2.4%, 50=9.2%, 100=46.5%
     lat (msec): 250=40.4%, 500=0.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21770
  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=0.1%, 10=0.1%, 20=0.9%, 50=10.1%, 100=47.4%
     lat (msec): 250=41.4%, 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=3520/2284, merge=445/269, ticks=40220/35272, in_queue=75480, util=98.98%
0.36user 0.55system 0:21.64elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
380984inputs+233304outputs (0major+2464minor)pagefaults 0swaps