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] [  7054/ 13360 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [18.2% done] [ 13868/  8602 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [  7036/ 11555 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 13502/  6826 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 14500/  5361 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 17078/     0 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [37.5% done] [ 10057/  6274 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  3632/ 12056 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  6038/  9455 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  8630/  5144 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  7119/  6781 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  7972/  4771 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  6123/  4384 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  5026/  5506 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  7314/  2625 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6781/  2295 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6590/  1633 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13564, got signal=6
Threads: 2: [_mm] [64.5% done] [  5636/  1828 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13566, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
Threads: 1: [_m_] [67.7% done] [  7029/   325 kb/s] [eta 00m:10s]
fio: pid=13565, got signal=6

fio: (groupid=0): err= 0: pid=13564
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=6.1%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.1%, 20=0.8%, 50=9.9%, 100=47.2%
     lat (msec): 250=41.5%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13565
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.9%, 8=93.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.4%, 20=2.8%, 50=8.3%, 100=39.6%
     lat (msec): 250=47.2%, 500=0.9%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13566
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=5.7%, 8=93.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.6%, 20=1.3%, 50=10.0%, 100=41.8%
     lat (msec): 250=44.9%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3553/2550, merge=343/150, ticks=41684/40744, in_queue=82412, util=99.00%
0.34user 0.33system 0:21.50elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
360808inputs+253600outputs (0major+2459minor)pagefaults 0swaps