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: [mFm] [16.7% done] [  6842/ 22365 kb/s] [eta 00m:15s]
Threads: 3: [mFF] [28.6% done] [  2755/ 71631 kb/s] [eta 00m:10s]
Threads: 3: [mFF] [31.2% done] [  1934/  3035 kb/s] [eta 00m:11s]
Threads: 3: [mFF] [35.3% done] [  1857/  5749 kb/s] [eta 00m:11s]
Threads: 3: [mFF] [41.2% done] [  1239/  7505 kb/s] [eta 00m:10s]
Threads: 3: [mFF] [47.1% done] [  1470/  6265 kb/s] [eta 00m:09s]
Threads: 2: [m_F] [56.2% done] [  1019/ 10926 kb/s] [eta 00m:07s]
Threads: 2: [m_V] [66.7% done] [  1328/ 14384 kb/s] [eta 00m:05s]
Threads: 2: [m_V] [64.7% done] [ 59513/  1519 kb/s] [eta 00m:06s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12880, got signal=6

fio: (groupid=0): err= 0: pid=12880
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=74.2%, 4=2.8%, 8=22.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=64.7%, 4=9.1%, 10=0.5%, 20=0.1%, 50=1.0%, 100=7.6%
     lat (msec): 250=7.7%, 500=8.5%, 750=0.2%, 1000=0.2%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12881
  read : io=0KiB, bw=0KiB/s, runt=  8521msec
  write: io=100MiB, bw=12,394KiB/s, runt=  8460msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=    4, avg= 0.00, stdev= 0.10
    bw (KiB/s) : min=    0, max=59657, per=157.04%, avg=39505.33, stdev=34214.95
  cpu          : usr=14.51%, sys=4.79%, ctx=8568
  IO depths    : 1=99.7%, 2=0.2%, 4=0.1%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=99.6%, 4=0.0%, 10=0.1%, 20=0.0%, 50=0.0%, 100=0.0%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12882
  read : io=100MiB, bw=9,122KiB/s, runt= 11495msec
    slat (msec): min=    0, max=   12, avg= 0.06, stdev= 0.87
    clat (msec): min=    0, max=  264, avg=15.80, stdev=36.31
    bw (KiB/s) : min=   23, max=62701, per=166.27%, avg=20641.38, stdev=24621.37
  write: io=79,048KiB, bw=8,055KiB/s, runt= 10048msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  137, avg= 0.95, stdev= 5.78
    bw (KiB/s) : min=    0, max=61497, per=161.54%, avg=40637.67, stdev=35197.40
  cpu          : usr=13.67%, sys=6.12%, ctx=4877
  IO depths    : 1=3.5%, 2=60.3%, 4=24.4%, 8=11.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=51.7%, 4=18.5%, 10=20.7%, 20=2.0%, 50=0.7%, 100=3.5%
     lat (msec): 250=2.6%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=136MiB, aggrb=12,414KiB/s, minb=0KiB/s, maxb=9,122KiB/s, mint=8521msec, maxt=11495msec
  WRITE: io=241MiB, aggrb=25,156KiB/s, minb=0KiB/s, maxb=12,394KiB/s, mint=8521msec, maxt=11495msec

Disk stats (read/write):
  cciss!c0d0: ios=1729/2905, merge=22135/53949, ticks=68060/1186312, in_queue=1254940, util=97.68%
4.01user 1.45system 0:11.81elapsed 46%CPU (0avgtext+0avgdata 0maxresident)k
326256inputs+493800outputs (1major+2430minor)pagefaults 0swaps