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] [13.0% done] [ 12568/  9290 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [ 11498/  9534 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [21.7% done] [ 14228/  4978 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [26.1% done] [  8000/ 11584 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [29.2% done] [ 14667/  4929 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [33.3% done] [ 10303/  6089 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 14037/  3632 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [41.7% done] [ 12141/  4982 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [44.0% done] [  7683/  7626 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [48.0% done] [  6198/  7886 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [50.0% done] [  8810/  4096 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [53.8% done] [  4872/  7354 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [55.6% done] [  3990/  6434 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  4580/  6731 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  3811/  5295 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  8391/  1509 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  8533/   199 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [64.5% done] [  5027/  2021 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21441, got signal=6
Threads: 2: [_Vm] [65.6% done] [ 15098/   577 kb/s] [eta 00m:11s]
Threads: 2: [_Vm] [66.7% done] [ 20313/  1212 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=21443, got signal=6

fio: (groupid=0): err= 0: pid=21441
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=6.3%, 8=93.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=1.9%, 50=7.2%, 100=48.5%
     lat (msec): 250=41.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21442
  read : io=100MiB, bw=4,540KiB/s, runt= 22984msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  463, avg=67.29, stdev=54.95
    bw (KiB/s) : min=  252, max=24862, per=56.50%, avg=6003.04, stdev=6419.75
  write: io=46,576KiB, bw=2,309KiB/s, runt= 20647msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   46, max=  179, avg=113.36, stdev=25.87
    bw (KiB/s) : min=    0, max= 7434, per=62.89%, avg=3578.17, stdev=2442.99
  cpu          : usr=0.44%, sys=0.54%, ctx=7842
  IO depths    : 1=0.1%, 2=1.4%, 4=18.6%, 8=79.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.4%, 4=0.8%, 10=6.4%, 20=10.0%, 50=14.5%, 100=29.8%
     lat (msec): 250=37.4%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=21443
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=5.7%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=2.0%, 50=7.9%, 100=37.6%
     lat (msec): 250=49.1%, 500=2.7%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=233MiB, aggrb=10,625KiB/s, minb=0KiB/s, maxb=4,540KiB/s, mint=0msec, maxt=22984msec
  WRITE: io=112MiB, aggrb=5,690KiB/s, minb=0KiB/s, maxb=2,309KiB/s, mint=0msec, maxt=22984msec

Disk stats (read/write):
  cciss!c0d0: ios=4493/2398, merge=770/200, ticks=48668/37156, in_queue=85824, util=98.55%
0.24user 0.58system 0:23.45elapsed 3%CPU (0avgtext+0avgdata 0maxresident)k
477048inputs+229528outputs (0major+2449minor)pagefaults 0swaps