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] [33.3% done] [ 16453/ 24096 kb/s] [eta 00m:06s]
Threads: 3: [mmF] [50.0% done] [  5010/ 47599 kb/s] [eta 00m:04s]
Threads: 3: [mmF] [62.5% done] [  1836/ 52134 kb/s] [eta 00m:03s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=29345, got signal=6
Threads: 2: [F_F] [100.0% done] [  4152/  7488 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] [68.4% done] [  8472/     0 kb/s] [eta 00m:06s]
Threads: 2: [V_V] [87.5% done] [ 65934/     0 kb/s] [eta 00m:02s]
Threads: 2: [V_V] [100.0% done] [ 66117/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=29344
  read : io=100MiB, bw=6,733KiB/s, runt= 15573msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  303, avg=28.19, stdev=49.27
    bw (KiB/s) : min=    0, max=32759, per=78.94%, avg=12206.64, stdev=11243.23
  write: io=72,220KiB, bw=5,734KiB/s, runt= 12896msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  179, avg= 1.63, stdev= 9.66
    bw (KiB/s) : min=    0, max=56991, per=122.49%, avg=23227.25, stdev=24213.11
  cpu          : usr=9.86%, sys=4.57%, ctx=5633
  IO depths    : 1=1.7%, 2=55.2%, 4=26.7%, 8=16.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=45.4%, 4=14.4%, 10=22.4%, 20=4.0%, 50=2.0%, 100=5.1%
     lat (msec): 250=6.2%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29345
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=61.7%, 2=11.9%, 4=4.6%, 8=21.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=68.3%, 4=4.0%, 10=0.8%, 20=3.7%, 50=3.8%, 100=11.6%
     lat (msec): 250=6.7%, 500=0.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29346
  read : io=100MiB, bw=6,768KiB/s, runt= 15491msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  129, avg=16.47, stdev=30.47
    bw (KiB/s) : min=   17, max=43321, per=120.78%, avg=18675.56, stdev=18991.68
  write: io=94,692KiB, bw=7,516KiB/s, runt= 12900msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   39, avg= 0.65, stdev= 1.95
    bw (KiB/s) : min=    0, max=59420, per=186.84%, avg=35430.40, stdev=32315.73
  cpu          : usr=12.63%, sys=4.73%, ctx=6283
  IO depths    : 1=12.0%, 2=51.1%, 4=25.6%, 8=11.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=52.8%, 4=18.0%, 10=16.9%, 20=2.1%, 50=2.8%, 100=4.7%
     lat (msec): 250=2.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=230MiB, aggrb=15,463KiB/s, minb=0KiB/s, maxb=6,768KiB/s, mint=15491msec, maxt=15573msec
  WRITE: io=233MiB, aggrb=18,963KiB/s, minb=0KiB/s, maxb=7,516KiB/s, mint=15491msec, maxt=15573msec

Disk stats (read/write):
  cciss!c0d0: ios=2289/3288, merge=4333/56330, ticks=178612/1416520, in_queue=1595128, util=97.81%
4.64user 1.85system 0:15.88elapsed 40%CPU (0avgtext+0avgdata 0maxresident)k
549104inputs+477816outputs (0major+2443minor)pagefaults 0swaps