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] [37.5% done] [  4726/ 43856 kb/s] [eta 00m:05s]
Threads: 3: [mmm] [50.0% done] [  4071/ 37542 kb/s] [eta 00m:04s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17943, got signal=6
Threads: 2: [_Fm] [50.0% done] [  1866/ 20553 kb/s] [eta 00m:05s]
Threads: 2: [_Fm] [60.0% done] [  1183/ 12035 kb/s] [eta 00m:04s]
Threads: 2: [_Fm] [58.3% done] [   732/  1980 kb/s] [eta 00m:05s]
Threads: 2: [_Fm] [66.7% done] [   589/ 14537 kb/s] [eta 00m:04s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=17945, got signal=6
Threads: 1: [_F_] [100.0% done] [   223/     0 kb/s] [eta 00m:00s]
Threads: 1: [_F_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [_F_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [_F_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [_F_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [_V_] [82.4% done] [ 20870/     0 kb/s] [eta 00m:03s]
Threads: 1: [_V_] [100.0% done] [ 66459/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=17943
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=24.2%, 2=67.6%, 4=2.9%, 8=5.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=84.1%, 4=7.6%, 10=2.0%, 20=0.2%, 50=0.4%, 100=0.7%
     lat (msec): 250=2.3%, 500=2.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17944
  read : io=100MiB, bw=6,863KiB/s, runt= 15276msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  390, avg=17.69, stdev=58.32
    bw (KiB/s) : min=   10, max=67413, per=173.74%, avg=13612.82, stdev=26392.24
  write: io=93,976KiB, bw=6,998KiB/s, runt= 13751msec
    slat (msec): min=    0, max=    1, avg= 0.00, stdev= 0.03
    clat (msec): min=    0, max=  291, avg= 2.71, stdev=18.42
    bw (KiB/s) : min=    0, max=62816, per=103.30%, avg=21861.40, stdev=23860.78
  cpu          : usr=13.75%, sys=4.03%, ctx=5291
  IO depths    : 1=4.6%, 2=62.7%, 4=24.4%, 8=8.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=51.0%, 4=25.5%, 10=17.3%, 20=1.3%, 50=0.5%, 100=0.6%
     lat (msec): 250=2.4%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17945
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=85.6%, 4=3.4%, 8=10.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=69.9%, 4=14.9%, 10=1.9%, 20=0.1%, 50=0.2%, 100=1.4%
     lat (msec): 250=3.3%, 500=7.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=114MiB, aggrb=7,835KiB/s, minb=0KiB/s, maxb=6,863KiB/s, mint=0msec, maxt=15276msec
  WRITE: io=278MiB, aggrb=21,162KiB/s, minb=0KiB/s, maxb=6,998KiB/s, mint=0msec, maxt=15276msec

Disk stats (read/write):
  cciss!c0d0: ios=1373/4408, merge=997/66507, ticks=60424/1853476, in_queue=1915888, util=98.36%
5.21user 1.44system 0:15.59elapsed 42%CPU (0avgtext+0avgdata 0maxresident)k
253568inputs+568536outputs (0major+2474minor)pagefaults 0swaps