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] [12.5% done] [ 14549/  6613 kb/s] [eta 00m:21s]
Threads: 3: [mmm] [16.7% done] [ 11710/  7573 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.8% done] [ 12678/  7509 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 12942/  7009 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [ 16095/  3303 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 11474/  6024 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [36.0% done] [  8598/  8253 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.0% done] [ 11280/  5680 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 10242/  4791 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [ 14740/  1452 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  9975/  3092 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  7606/  5068 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [  9395/  3388 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [59.3% done] [ 11836/   260 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  6781/  3364 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  2791/  5664 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31713, got signal=6
Threads: 2: [_mm] [63.3% done] [  3579/  4075 kb/s] [eta 00m:11s]
Threads: 2: [_mm] [64.5% done] [  1980/  4270 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=31715, got signal=6
Threads: 1: [_m_] [67.7% done] [   614/  5442 kb/s] [eta 00m:10s]
Threads: 1: [_V_] [81.5% done] [ 19861/     0 kb/s] [eta 00m:05s]
fio: (groupid=0): err= 0: pid=31713
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.3%, 4=4.5%, 8=95.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.8%, 50=9.9%, 100=44.0%
     lat (msec): 250=44.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31714
  read : io=100MiB, bw=4,633KiB/s, runt= 22584msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  607, avg=71.48, stdev=53.40
    bw (KiB/s) : min=    3, max=34844, per=56.72%, avg=5847.69, stdev=6894.49
  write: io=36,352KiB, bw=1,762KiB/s, runt= 21119msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   23, max=  723, avg=106.59, stdev=87.94
    bw (KiB/s) : min=    0, max= 6849, per=62.82%, avg=3530.69, stdev=2695.93
  cpu          : usr=0.41%, sys=0.32%, ctx=7789
  IO depths    : 1=0.1%, 2=1.4%, 4=16.5%, 8=82.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=1.2%, 10=6.8%, 20=8.2%, 50=19.0%, 100=33.2%
     lat (msec): 250=30.0%, 500=0.6%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=31715
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.5%, 8=94.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.4%, 20=1.3%, 50=10.3%, 100=48.2%
     lat (msec): 250=38.8%, 500=0.4%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=222MiB, aggrb=10,309KiB/s, minb=0KiB/s, maxb=4,633KiB/s, mint=0msec, maxt=22584msec
  WRITE: io=113MiB, aggrb=5,620KiB/s, minb=0KiB/s, maxb=1,762KiB/s, mint=0msec, maxt=22584msec

Disk stats (read/write):
  cciss!c0d0: ios=4234/2479, merge=869/132, ticks=46424/33584, in_queue=80008, util=98.33%
0.20user 0.51system 0:23.05elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
454840inputs+231872outputs (0major+2453minor)pagefaults 0swaps