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] [ 12678/  6725 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 20211/   939 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 13949/  5579 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [ 15139/  3400 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [ 18800/     0 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [  6662/  9298 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 11820/  5316 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 10477/  5409 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  7101/  7447 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  9111/  6040 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 11763/  2212 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  7935/  4954 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  8387/  3095 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  7814/  3258 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  9146/   666 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6383/  3019 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  5523/  3294 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32380, got signal=6
Threads: 2: [mm_] [64.5% done] [  3169/  4104 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32379, got signal=6
Threads: 1: [m__] [67.7% done] [  6182/   817 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=32378, got signal=6

fio: (groupid=0): err= 0: pid=32378
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.6%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.5%, 20=1.9%, 50=7.6%, 100=39.7%
     lat (msec): 250=48.6%, 500=1.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=32379
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.1%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=2.2%, 50=6.9%, 100=47.2%
     lat (msec): 250=42.8%, 500=0.4%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=32380
  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=1.3%, 50=7.6%, 100=45.1%
     lat (msec): 250=45.5%, 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=4300/1705, merge=783/168, ticks=52840/25096, in_queue=77924, util=99.04%
0.33user 0.34system 0:21.60elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
460472inputs+153880outputs (0major+2454minor)pagefaults 0swaps