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] [ 10804/  9772 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [19.0% done] [ 21224/   557 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [22.7% done] [ 17864/  2965 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [ 15173/  2673 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [  9192/  8834 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [  8090/  8927 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 10364/  7606 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [  9301/  5936 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 14681/  2157 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  7805/  5121 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [  7346/  6664 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [  8732/  4681 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  3550/  6495 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  4108/  5234 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  7374/  3595 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5839/  3697 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  4323/  2835 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=20013, got signal=6
Threads: 2: [m_m] [64.5% done] [  8130/   423 kb/s] [eta 00m:11s]
Threads: 2: [m_V] [65.6% done] [ 24189/     0 kb/s] [eta 00m:11s]
Threads: 1: [m__] [66.7% done] [ 13137/   881 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=20012, got signal=6

fio: (groupid=0): err= 0: pid=20012
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=4.6%, 8=95.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.1%, 50=10.2%, 100=43.1%
     lat (msec): 250=43.7%, 500=1.1%, 750=0.6%, 1000=0.5%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=20013
  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=0.3%, 20=0.9%, 50=11.6%, 100=43.3%
     lat (msec): 250=43.4%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=20014
  read : io=100MiB, bw=4,760KiB/s, runt= 21955msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  543, avg=68.64, stdev=53.18
    bw (KiB/s) : min=  791, max=28622, per=52.83%, avg=5960.89, stdev=5634.99
  write: io=35,168KiB, bw=1,778KiB/s, runt= 20247msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   47, max=  191, avg=112.53, stdev=24.98
    bw (KiB/s) : min=    0, max= 6587, per=59.71%, avg=3015.52, stdev=2357.22
  cpu          : usr=0.29%, sys=0.51%, ctx=7509
  IO depths    : 1=0.1%, 2=1.0%, 4=16.0%, 8=82.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.5%, 10=4.7%, 20=8.2%, 50=19.5%, 100=29.3%
     lat (msec): 250=37.0%, 500=0.2%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=236MiB, aggrb=11,284KiB/s, minb=0KiB/s, maxb=4,760KiB/s, mint=21955msec, maxt=21955msec
  WRITE: io=99,868KiB, aggrb=5,050KiB/s, minb=0KiB/s, maxb=1,778KiB/s, mint=21955msec, maxt=21955msec

Disk stats (read/write):
  cciss!c0d0: ios=4438/2265, merge=678/209, ticks=49848/33736, in_queue=83580, util=99.16%
0.18user 0.35system 0:22.92elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
484328inputs+199776outputs (0major+2446minor)pagefaults 0swaps