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] [ 10650/  9411 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 14216/  6312 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 12788/  7891 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [25.0% done] [ 16746/  2574 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 12344/  6813 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 10453/  6951 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  3583/ 12190 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 11466/  5361 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  5971/  9314 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.2% done] [ 12365/  3343 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  7146/  6601 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  7244/  6536 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  8155/  4096 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  3298/  6979 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [58.6% done] [  4645/  5007 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  4555/  3953 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=11661, got signal=6
Threads: 2: [_mm] [61.3% done] [  2090/  5194 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=11663, got signal=6
Threads: 1: [_m_] [64.5% done] [  3750/  3782 kb/s] [eta 00m:11s]
Threads: 1: [_m_] [67.7% done] [  3522/  2501 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=11662, got signal=6

fio: (groupid=0): err= 0: pid=11661
  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=1.0%, 50=9.2%, 100=56.8%
     lat (msec): 250=32.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=11662
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=5.7%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.0%, 10=0.1%, 20=1.6%, 50=18.5%, 100=27.8%
     lat (msec): 250=50.1%, 500=1.2%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=11663
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.5%, 8=95.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.1%, 50=12.7%, 100=42.8%
     lat (msec): 250=43.3%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3128/2620, merge=665/109, ticks=38940/34380, in_queue=73312, util=99.08%
0.19user 0.52system 0:21.58elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
363320inputs+250984outputs (0major+2464minor)pagefaults 0swaps