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] [9.4% done] [  7423/ 41488 kb/s] [eta 00m:29s]
Threads: 3: [mmm] [12.5% done] [ 10685/ 17681 kb/s] [eta 00m:28s]
Threads: 3: [mmm] [26.3% done] [  9819/ 16750 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [30.0% done] [  4368/ 66393 kb/s] [eta 00m:14s]
Threads: 3: [mmF] [33.3% done] [  6015/  3498 kb/s] [eta 00m:14s]
Threads: 3: [mmF] [34.8% done] [  4291/ 15184 kb/s] [eta 00m:15s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5895, got signal=6
Threads: 2: [_mF] [40.9% done] [  4051/ 15110 kb/s] [eta 00m:13s]
Threads: 2: [_mF] [50.0% done] [   996/ 14460 kb/s] [eta 00m:10s]
Threads: 2: [_mF] [52.4% done] [  1905/     0 kb/s] [eta 00m:10s]
Threads: 2: [_mF] [52.2% done] [  2045/     0 kb/s] [eta 00m:11s]
Threads: 2: [_mF] [54.2% done] [  1659/     0 kb/s] [eta 00m:11s]
Threads: 2: [_FF] [100.0% done] [   138/ 20947 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_VV] [72.7% done] [ 29899/     0 kb/s] [eta 00m:06s]
Threads: 2: [_VV] [89.5% done] [ 56827/     0 kb/s] [eta 00m:02s]
Threads: 2: [_VV] [100.0% done] [ 57104/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=5895
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=39.5%, 2=41.1%, 4=3.7%, 8=15.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=78.4%, 4=1.5%, 10=0.5%, 20=0.3%, 50=1.2%, 100=1.4%
     lat (msec): 250=13.0%, 500=3.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5896
  read : io=100MiB, bw=5,762KiB/s, runt= 18194msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  381, avg=71.34, stdev=96.36
    bw (KiB/s) : min=    1, max=33370, per=48.86%, avg=6255.03, stdev=7893.16
  write: io=61,056KiB, bw=4,053KiB/s, runt= 15423msec
    slat (msec): min=    0, max=    1, avg= 0.00, stdev= 0.03
    clat (msec): min=    0, max=  246, avg= 2.50, stdev=15.19
    bw (KiB/s) : min=    0, max= 5163, per=21.86%, avg=3284.33, stdev=2854.13
  cpu          : usr=6.75%, sys=3.80%, ctx=6746
  IO depths    : 1=1.0%, 2=47.1%, 4=28.2%, 8=23.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=38.3%, 4=12.3%, 10=20.6%, 20=5.1%, 50=2.0%, 100=1.7%
     lat (msec): 250=15.5%, 500=4.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=5897
  read : io=100MiB, bw=5,734KiB/s, runt= 18286msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  385, avg=31.03, stdev=65.46
    bw (KiB/s) : min=    0, max=35897, per=90.23%, avg=11551.69, stdev=13587.01
  write: io=86,732KiB, bw=5,773KiB/s, runt= 15383msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  200, avg= 1.63, stdev=12.63
    bw (KiB/s) : min=    0, max=58793, per=130.39%, avg=19591.75, stdev=26654.94
  cpu          : usr=9.47%, sys=4.37%, ctx=10518
  IO depths    : 1=37.4%, 2=26.1%, 4=24.4%, 8=12.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=51.8%, 4=16.4%, 10=18.5%, 20=3.0%, 50=0.6%, 100=2.0%
     lat (msec): 250=6.4%, 500=1.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=223MiB, aggrb=12,803KiB/s, minb=0KiB/s, maxb=5,762KiB/s, mint=18194msec, maxt=18286msec
  WRITE: io=221MiB, aggrb=15,026KiB/s, minb=0KiB/s, maxb=5,773KiB/s, mint=18194msec, maxt=18286msec

Disk stats (read/write):
  cciss!c0d0: ios=4991/3589, merge=1064/52950, ticks=70000/1806512, in_queue=1879736, util=98.85%
4.24user 1.83system 0:18.60elapsed 32%CPU (0avgtext+0avgdata 0maxresident)k
593736inputs+452696outputs (0major+2459minor)pagefaults 0swaps