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] [15.8% done] [ 21948/     0 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [21.1% done] [ 17465/ 45056 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [26.3% done] [ 13142/ 25137 kb/s] [eta 00m:14s]
Threads: 3: [mFm] [27.3% done] [  2879/ 45426 kb/s] [eta 00m:16s]
Threads: 3: [mFm] [28.0% done] [  2957/  1391 kb/s] [eta 00m:18s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21427, got signal=6
Threads: 2: [mF_] [53.3% done] [  1418/ 43357 kb/s] [eta 00m:07s]
Threads: 2: [mF_] [52.9% done] [  1370/     0 kb/s] [eta 00m:08s]
Threads: 2: [mF_] [58.8% done] [   915/ 10839 kb/s] [eta 00m:07s]
Threads: 2: [FF_] [100.0% done] [   207/ 12109 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [FF_] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [VV_] [68.2% done] [ 19755/     0 kb/s] [eta 00m:07s]
Threads: 2: [VV_] [84.2% done] [ 54785/     0 kb/s] [eta 00m:03s]
Threads: 1: [VE_] [100.0% done] [ 51946/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=21425
  read : io=100MiB, bw=6,027KiB/s, runt= 17396msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  454, avg=54.32, stdev=89.51
    bw (KiB/s) : min=   29, max=26497, per=49.31%, avg=6959.88, stdev=7106.84
  write: io=57,164KiB, bw=3,979KiB/s, runt= 14711msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  411, avg= 3.82, stdev=28.76
    bw (KiB/s) : min=    0, max=59801, per=129.48%, avg=18267.25, stdev=28046.94
  cpu          : usr=6.46%, sys=3.98%, ctx=6411
  IO depths    : 1=1.4%, 2=49.5%, 4=25.5%, 8=23.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=43.8%, 4=10.4%, 10=20.2%, 20=5.9%, 50=0.3%, 100=5.3%
     lat (msec): 250=10.2%, 500=3.8%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21426
  read : io=100MiB, bw=6,113KiB/s, runt= 17144msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  330, avg=29.61, stdev=51.94
    bw (KiB/s) : min=    3, max=43764, per=86.79%, avg=12249.07, stdev=14243.37
  write: io=78,140KiB, bw=5,445KiB/s, runt= 14695msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  251, avg= 2.08, stdev=13.98
    bw (KiB/s) : min=    0, max=60071, per=140.21%, avg=19780.50, stdev=27238.34
  cpu          : usr=9.73%, sys=4.41%, ctx=6120
  IO depths    : 1=2.2%, 2=56.8%, 4=25.5%, 8=15.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=43.8%, 4=18.6%, 10=21.1%, 20=3.2%, 50=0.8%, 100=3.7%
     lat (msec): 250=8.0%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21427
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=73.0%, 4=3.6%, 8=23.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=62.0%, 4=11.4%, 10=1.2%, 20=0.3%, 50=0.7%, 100=7.5%
     lat (msec): 250=14.5%, 500=2.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=234MiB, aggrb=14,114KiB/s, minb=0KiB/s, maxb=6,113KiB/s, mint=0msec, maxt=17396msec
  WRITE: io=198MiB, aggrb=14,108KiB/s, minb=0KiB/s, maxb=5,445KiB/s, mint=0msec, maxt=17396msec

Disk stats (read/write):
  cciss!c0d0: ios=3267/3338, merge=15350/47207, ticks=205356/1384824, in_queue=1591972, util=98.54%
4.01user 1.94system 0:17.72elapsed 33%CPU (0avgtext+0avgdata 0maxresident)k
615392inputs+405400outputs (0major+2454minor)pagefaults 0swaps