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] [12.5% done] [ 19260/  1718 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [17.4% done] [ 11597/  8638 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [  8102/  9635 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 10595/  7781 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 12763/  5534 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [ 12410/  5649 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 10772/  5774 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 10638/  5977 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  8346/  6330 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [ 10953/  4230 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  5619/  7545 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  4482/  8159 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  8480/  3083 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  7988/  3701 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  8859/  2192 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  7594/  2356 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  7753/  1093 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19590, got signal=6
Threads: 2: [mm_] [64.5% done] [  6440/  1458 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19589, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19588, got signal=6

fio: (groupid=0): err= 0: pid=19588
  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=0.1%, 20=0.0%, 50=9.6%, 100=38.5%
     lat (msec): 250=50.2%, 500=0.7%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19589
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=8.0%, 8=91.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=3.5%, 50=8.6%, 100=39.8%
     lat (msec): 250=47.1%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19590
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.2%, 8=92.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.0%, 50=9.9%, 100=49.0%
     lat (msec): 250=39.5%, 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=3802/2195, merge=667/101, ticks=47596/30560, in_queue=78156, util=98.82%
0.49user 0.34system 0:21.37elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
407104inputs+206896outputs (0major+2447minor)pagefaults 0swaps