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] [ 15465/ 47941 kb/s] [eta 00m:07s]
Threads: 3: [Fmm] [33.3% done] [  4673/ 45868 kb/s] [eta 00m:08s]
Threads: 3: [Fmm] [33.3% done] [   658/     0 kb/s] [eta 00m:10s]
Threads: 3: [Fmm] [33.3% done] [   325/   264 kb/s] [eta 00m:12s]
Threads: 3: [Fmm] [35.0% done] [   601/     0 kb/s] [eta 00m:13s]
Threads: 3: [Fmm] [34.8% done] [   353/     0 kb/s] [eta 00m:15s]
Threads: 3: [Fmm] [34.6% done] [   362/ 11905 kb/s] [eta 00m:17s]
Threads: 3: [FmF] [43.5% done] [   557/ 14756 kb/s] [eta 00m:13s]
Threads: 3: [VmV] [55.0% done] [ 13267/ 15953 kb/s] [eta 00m:09s]
Threads: 3: [VmV] [54.5% done] [ 64470/     0 kb/s] [eta 00m:10s]
Threads: 3: [VmV] [65.0% done] [ 63636/ 15554 kb/s] [eta 00m:07s]
Threads: 2: [_FV] [100.0% done] [ 29599/  2826 kb/s] [eta 00m:00s]
Threads: 2: [_FV] [100.0% done] [  3168/     0 kb/s] [eta 00m:00s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=11493, got signal=6

fio: (groupid=0): err= 0: pid=11492
  read : io=100MiB, bw=7,729KiB/s, runt= 13564msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  237, avg=17.89, stdev=41.06
    bw (KiB/s) : min=    0, max=39949, per=122.49%, avg=19229.80, stdev=16597.31
  write: io=90,624KiB, bw=8,577KiB/s, runt= 10819msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  182, avg= 1.23, stdev= 8.55
    bw (KiB/s) : min=    0, max=62362, per=151.71%, avg=35690.25, stdev=30551.01
  cpu          : usr=13.54%, sys=5.57%, ctx=7966
  IO depths    : 1=24.9%, 2=39.6%, 4=25.7%, 8=9.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.7%, 4=19.5%, 10=21.0%, 20=3.2%, 50=0.5%, 100=1.0%
     lat (msec): 250=4.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=11493
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=39.3%, 2=35.8%, 4=5.4%, 8=19.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=64.0%, 4=9.5%, 10=1.8%, 20=1.6%, 50=3.4%, 100=8.8%
     lat (msec): 250=6.1%, 500=0.5%, 750=0.6%, 1000=1.2%, >=2000=1.9%
fio: (groupid=0): err= 0: pid=11494
  read : io=100MiB, bw=6,873KiB/s, runt= 15254msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max= 2107, avg=48.32, stdev=179.54
    bw (KiB/s) : min=    6, max=37650, per=57.65%, avg=9051.09, stdev=11050.83
  write: io=84,628KiB, bw=8,009KiB/s, runt= 10819msec
    slat (msec): min=    0, max=    2, avg= 0.00, stdev= 0.07
    clat (msec): min=    0, max= 1706, avg= 8.75, stdev=100.09
    bw (KiB/s) : min=    0, max=54558, per=64.16%, avg=15094.20, stdev=22675.63
  cpu          : usr=11.56%, sys=5.77%, ctx=8735
  IO depths    : 1=24.9%, 2=38.4%, 4=25.1%, 8=11.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=50.6%, 4=14.5%, 10=20.9%, 20=2.6%, 50=0.9%, 100=2.5%
     lat (msec): 250=5.8%, 500=0.6%, 750=0.4%, 1000=0.1%, >=2000=0.8%

Run status group 0 (all jobs):
   READ: io=228MiB, aggrb=15,699KiB/s, minb=0KiB/s, maxb=7,729KiB/s, mint=15254msec, maxt=15254msec
  WRITE: io=243MiB, aggrb=23,525KiB/s, minb=0KiB/s, maxb=8,577KiB/s, mint=15254msec, maxt=15254msec

Disk stats (read/write):
  cciss!c0d0: ios=4498/3404, merge=1064/58761, ticks=55388/1227604, in_queue=1283000, util=97.72%
4.96user 2.32system 0:15.65elapsed 46%CPU (0avgtext+0avgdata 0maxresident)k
564912inputs+497136outputs (0major+2449minor)pagefaults 0swaps