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] [11.5% done] [ 10626/ 10012 kb/s] [eta 00m:23s]
Threads: 3: [mmm] [16.7% done] [ 16867/  5115 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 14159/  5503 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 10150/  8045 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [  8671/  8118 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [ 10913/  7467 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [  8094/  7249 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 12104/  4889 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [42.3% done] [  4603/  9427 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [  8647/  3900 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [  4994/  8082 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  6036/  6308 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [53.6% done] [  9488/  2864 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.2% done] [  6837/  4218 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.6% done] [  1288/  7976 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.0% done] [  5731/  3441 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [61.3% done] [  7260/  2607 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15115, got signal=6
Threads: 2: [mm_] [62.5% done] [  7256/   813 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15114, got signal=6
Threads: 1: [m__] [65.6% done] [  2265/  4006 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=15113, got signal=6

fio: (groupid=0): err= 0: pid=15113
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.8%, 8=94.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.5%, 50=15.2%, 100=40.7%
     lat (msec): 250=42.0%, 500=0.7%, 750=0.4%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15114
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.4%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=2.6%, 50=6.8%, 100=42.3%
     lat (msec): 250=47.1%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=15115
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.9%, 8=93.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.7%, 50=8.1%, 100=44.1%
     lat (msec): 250=45.9%, 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=3485/2671, merge=405/165, ticks=43508/39040, in_queue=82548, util=98.24%
0.18user 0.40system 0:22.41elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
366144inputs+247816outputs (0major+2463minor)pagefaults 0swaps