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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21260, got signal=6
Threads: 2
Threads: 2: [m_m] [30.0% done] [  4270/ 11096 kb/s] [eta 00m:07s]
Threads: 2: [m_m] [40.0% done] [  3953/ 17920 kb/s] [eta 00m:06s]
Threads: 2: [m_m] [50.0% done] [  2481/ 15188 kb/s] [eta 00m:05s]
Threads: 2: [m_m] [54.5% done] [  2245/ 24425 kb/s] [eta 00m:05s]
Threads: 2: [F_m] [63.6% done] [  1312/ 15441 kb/s] [eta 00m:04s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21261, got signal=6
Threads: 1: [F__] [100.0% done] [   593/  9359 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [F__] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 1: [V__] [93.8% done] [ 40028/     0 kb/s] [eta 00m:01s]
fio: (groupid=0): err= 0: pid=21259
  read : io=100MiB, bw=6,526KiB/s, runt= 16066msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  395, avg=25.72, stdev=65.57
    bw (KiB/s) : min=    3, max=64991, per=159.69%, avg=12898.07, stdev=23255.60
  write: io=88,900KiB, bw=6,329KiB/s, runt= 14383msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  259, avg= 2.91, stdev=16.58
    bw (KiB/s) : min=    0, max=25723, per=73.00%, avg=13989.00, stdev=10880.37
  cpu          : usr=11.63%, sys=4.76%, ctx=7828
  IO depths    : 1=19.0%, 2=42.5%, 4=26.3%, 8=12.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=44.8%, 4=19.5%, 10=23.2%, 20=4.1%, 50=1.2%, 100=2.1%
     lat (msec): 250=3.2%, 500=1.7%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21260
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=35.6%, 2=54.3%, 4=8.0%, 8=2.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=95.9%, 4=0.0%, 10=1.4%, 20=0.0%, 50=0.5%, 100=0.4%
     lat (msec): 250=1.5%, 500=0.1%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21261
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=40.1%, 2=41.1%, 4=2.7%, 8=16.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=78.0%, 4=2.5%, 10=0.5%, 20=0.0%, 50=0.9%, 100=6.7%
     lat (msec): 250=5.5%, 500=5.4%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=124MiB, aggrb=8,077KiB/s, minb=0KiB/s, maxb=6,526KiB/s, mint=0msec, maxt=16066msec
  WRITE: io=263MiB, aggrb=19,164KiB/s, minb=0KiB/s, maxb=6,329KiB/s, mint=0msec, maxt=16066msec

Disk stats (read/write):
  cciss!c0d0: ios=2450/4133, merge=495/62924, ticks=22520/1778988, in_queue=1802564, util=95.93%
4.36user 1.54system 0:16.42elapsed 35%CPU (0avgtext+0avgdata 0maxresident)k
297472inputs+538400outputs (0major+2471minor)pagefaults 0swaps