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] [14.3% done] [ 14827/  6668 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [19.0% done] [ 18444/  3970 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [22.7% done] [ 10929/  8749 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [  8634/ 10122 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 16209/  3860 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [ 12068/  6253 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 13321/  3603 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [43.5% done] [ 15164/  1312 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [45.8% done] [  9347/  4059 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  6274/  6729 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  6162/  6890 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  4527/  7878 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  7781/  3656 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [ 10970/   801 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5595/  2958 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  4445/  4372 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  6341/  2281 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13100, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13099, got signal=6
Threads: 1: [__m] [64.5% done] [  7101/   227 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=13101, got signal=6

fio: (groupid=0): err= 0: pid=13099
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.4%, 4=4.6%, 8=94.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.1%, 10=0.2%, 20=1.0%, 50=7.5%, 100=51.0%
     lat (msec): 250=39.4%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13100
  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=0.0%, 4=0.1%, 10=0.1%, 20=1.0%, 50=11.1%, 100=48.6%
     lat (msec): 250=38.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=13101
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.5%, 8=93.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.3%, 20=2.2%, 50=10.0%, 100=44.7%
     lat (msec): 250=41.3%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):

Disk stats (read/write):
  cciss!c0d0: ios=3899/1920, merge=505/186, ticks=45184/30876, in_queue=76052, util=99.08%
0.27user 0.34system 0:21.01elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
417880inputs+196384outputs (0major+2454minor)pagefaults 0swaps