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: [FFF] [100.0% done] [     0/ 18541 kb/s] [eta 00m:00s]
Threads: 3: [FFF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 3: [FFF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 3: [FFF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 3: [FFF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 3: [FFF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 3: [FFF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 3: [FFF] [100.0% done] [     0/     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=29457, got signal=6
Threads: 2: [VV_] [91.7% done] [ 64706/     0 kb/s] [eta 00m:01s]
Threads: 2: [VV_] [100.0% done] [ 69912/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=29455
  read : io=100MiB, bw=8,170KiB/s, runt= 12829msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  363, avg=13.85, stdev=35.87
    bw (KiB/s) : min=    0, max=36667, per=128.64%, avg=21022.71, stdev=12400.10
  write: io=86,680KiB, bw=8,791KiB/s, runt= 10096msec
    slat (msec): min=    0, max=    1, avg= 0.00, stdev= 0.03
    clat (msec): min=    0, max=   75, avg= 0.30, stdev= 2.85
    bw (KiB/s) : min=    0, max=82485, per=146.46%, avg=41242.50, stdev=58325.70
  cpu          : usr=8.32%, sys=5.05%, ctx=10173
  IO depths    : 1=47.8%, 2=18.7%, 4=23.7%, 8=9.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=56.5%, 4=15.6%, 10=19.6%, 20=1.4%, 50=1.9%, 100=3.1%
     lat (msec): 250=1.4%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29456
  read : io=100MiB, bw=8,360KiB/s, runt= 12540msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  299, avg=13.63, stdev=31.77
    bw (KiB/s) : min=   24, max=43065, per=133.36%, avg=21794.12, stdev=17476.28
  write: io=88,792KiB, bw=8,998KiB/s, runt= 10104msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  223, avg= 0.64, stdev= 9.90
    bw (KiB/s) : min=    0, max=16600, per=29.48%, avg=8300.00, stdev=11737.97
  cpu          : usr=9.63%, sys=5.58%, ctx=9291
  IO depths    : 1=49.6%, 2=16.6%, 4=23.8%, 8=9.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=56.6%, 4=16.9%, 10=18.2%, 20=1.1%, 50=1.7%, 100=2.8%
     lat (msec): 250=2.2%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=29457
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=95.2%, 4=4.5%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=82.5%, 4=15.2%, 10=1.7%, 20=0.0%, 50=0.0%, 100=0.0%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=200MiB, aggrb=16,342KiB/s, minb=0KiB/s, maxb=8,360KiB/s, mint=0msec, maxt=12829msec
  WRITE: io=271MiB, aggrb=28,159KiB/s, minb=0KiB/s, maxb=8,998KiB/s, mint=0msec, maxt=12829msec

Disk stats (read/write):
  cciss!c0d0: ios=1497/3151, merge=26062/66121, ticks=129480/1269664, in_queue=1400328, util=95.14%
3.74user 2.00system 0:13.51elapsed 42%CPU (0avgtext+0avgdata 0maxresident)k
468584inputs+555744outputs (0major+2451minor)pagefaults 0swaps