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] [ 15453/  5063 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [18.2% done] [  9131/ 11511 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [23.8% done] [ 18470/  2782 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [27.3% done] [ 12218/  7444 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 11344/  6093 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 11153/  6508 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 12918/  3001 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  9530/  4897 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  6341/  8362 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  9196/  4917 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  8683/  5010 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  6530/  5619 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [ 11690/   642 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  8716/  2375 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  7875/  1763 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  8680/  1338 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21570, got signal=6
Threads: 2: [_mm] [63.3% done] [  7042/   914 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21571, got signal=6
Threads: 1: [__m] [64.5% done] [  5393/  2106 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21572, got signal=6

fio: (groupid=0): err= 0: pid=21570
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.3%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.6%, 50=8.7%, 100=47.4%
     lat (msec): 250=41.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21571
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.4%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.3%, 20=2.6%, 50=9.2%, 100=45.3%
     lat (msec): 250=41.6%, 500=0.5%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21572
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.0%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.7%, 50=13.5%, 100=41.8%
     lat (msec): 250=42.5%, 500=1.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3869/1807, merge=528/239, ticks=44756/27360, in_queue=72112, util=98.97%
0.19user 0.32system 0:21.07elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
431224inputs+183112outputs (0major+2446minor)pagefaults 0swaps