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] [30.0% done] [ 17302/     0 kb/s] [eta 00m:07s]
Threads: 3: [mmm] [44.4% done] [ 14541/ 79414 kb/s] [eta 00m:05s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=6653, got signal=6
Threads: 2: [m_m] [62.5% done] [  7329/ 20813 kb/s] [eta 00m:03s]
Threads: 2: [F_F] [100.0% done] [   699/ 23172 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [78.9% done] [ 31386/     0 kb/s] [eta 00m:04s]
Threads: 2: [V_V] [100.0% done] [ 63506/     0 kb/s] [eta 00m:00s]
Threads: 1: [__V] [100.0% done] [ 63774/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=6652
  read : io=100MiB, bw=6,119KiB/s, runt= 17134msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  503, avg=30.91, stdev=62.44
    bw (KiB/s) : min=    0, max=35992, per=76.53%, avg=10383.50, stdev=13450.50
  write: io=82,944KiB, bw=5,856KiB/s, runt= 14503msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  211, avg= 2.15, stdev=13.15
    bw (KiB/s) : min=    1, max=25407, per=67.39%, avg=11339.50, stdev=10612.55
  cpu          : usr=10.27%, sys=4.32%, ctx=7431
  IO depths    : 1=8.3%, 2=50.1%, 4=26.1%, 8=15.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=43.0%, 4=17.2%, 10=22.1%, 20=3.6%, 50=2.4%, 100=4.9%
     lat (msec): 250=5.6%, 500=1.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=6653
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=19.9%, 2=57.6%, 4=6.8%, 8=15.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=62.8%, 4=14.6%, 10=1.3%, 20=2.1%, 50=7.3%, 100=4.6%
     lat (msec): 250=6.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=6654
  read : io=100MiB, bw=6,083KiB/s, runt= 17229msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  503, avg=29.03, stdev=53.01
    bw (KiB/s) : min=    8, max=32015, per=93.74%, avg=12718.69, stdev=11763.44
  write: io=76,540KiB, bw=5,405KiB/s, runt= 14499msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  177, avg= 0.88, stdev= 7.41
    bw (KiB/s) : min=    0, max=56516, per=164.87%, avg=27743.00, stdev=28719.26
  cpu          : usr=9.43%, sys=3.71%, ctx=9828
  IO depths    : 1=38.1%, 2=18.5%, 4=27.2%, 8=16.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=46.0%, 4=11.7%, 10=23.0%, 20=3.8%, 50=3.5%, 100=5.0%
     lat (msec): 250=6.4%, 500=0.4%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=223MiB, aggrb=13,568KiB/s, minb=0KiB/s, maxb=6,119KiB/s, mint=17229msec, maxt=17229msec
  WRITE: io=233MiB, aggrb=16,827KiB/s, minb=0KiB/s, maxb=5,856KiB/s, mint=17229msec, maxt=17229msec

Disk stats (read/write):
  cciss!c0d0: ios=4686/3589, merge=842/55957, ticks=37232/1425020, in_queue=1462252, util=98.10%
4.80user 1.75system 0:17.55elapsed 37%CPU (0avgtext+0avgdata 0maxresident)k
567552inputs+476704outputs (0major+2452minor)pagefaults 0swaps