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] [ 13162/  8285 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [  7988/ 13381 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 16819/  3900 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 16929/  1647 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 16835/  2925 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [ 12780/  5202 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [  6438/ 10693 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 14419/  2684 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [  9412/  5511 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  5129/  9017 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  7646/  5784 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  5897/  6833 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  4986/  5792 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  3371/  6544 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  6874/  3396 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  8220/  1395 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  8086/   959 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4375, got signal=6
Threads: 2: [m_m] [64.5% done] [  4181/  3009 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4374, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4376, got signal=6

fio: (groupid=0): err= 0: pid=4374
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.3%, 8=94.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.9%, 50=9.1%, 100=44.8%
     lat (msec): 250=44.3%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4375
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.6%, 8=94.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=1.7%, 50=7.9%, 100=51.6%
     lat (msec): 250=38.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4376
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.4%, 8=94.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=2.9%, 50=8.2%, 100=43.3%
     lat (msec): 250=44.3%, 500=0.7%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3545/2295, merge=779/175, ticks=41304/32952, in_queue=74252, util=100.00%
0.26user 0.34system 0:21.15elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
386752inputs+227576outputs (0major+2458minor)pagefaults 0swaps