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] [ 16144/  7480 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 15749/  4832 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [  6796/ 11938 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [ 18966/  3079 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 10036/  8923 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 12930/  5267 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 12788/  4429 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [ 10634/  5697 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [45.8% done] [ 12926/  3660 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [ 10209/  3453 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [52.0% done] [ 10469/  3420 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  8956/  3087 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  7821/  3815 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  8724/  1822 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5914/  4514 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  3050/  4710 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30514, got signal=6
Threads: 2: [mm_] [63.3% done] [  6672/   991 kb/s] [eta 00m:11s]
Threads: 2: [mm_] [66.7% done] [  8358/     0 kb/s] [eta 00m:10s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30512, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=30513, got signal=6

fio: (groupid=0): err= 0: pid=30512
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.7%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.2%, 20=1.4%, 50=8.7%, 100=43.6%
     lat (msec): 250=44.8%, 500=0.4%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=30513
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.3%, 8=94.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.0%, 50=8.2%, 100=47.1%
     lat (msec): 250=42.3%, 500=0.7%, 750=0.3%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=30514
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=7.1%, 8=92.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.0%, 20=1.1%, 50=10.3%, 100=47.5%
     lat (msec): 250=40.5%, 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=3856/1899, merge=653/133, ticks=46012/28632, in_queue=74636, util=99.14%
0.26user 0.47system 0:21.21elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
419704inputs+194344outputs (0major+2448minor)pagefaults 0swaps