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] [13.6% done] [ 20362/  2123 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 18133/  2948 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [  8570/ 11043 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 12597/  6764 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [31.8% done] [ 16762/  2721 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [34.8% done] [  8643/  6711 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 10709/  7187 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 14411/  1159 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 15246/  1113 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  9916/  4730 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 13268/  1122 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [ 12889/     0 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  7130/  3437 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  5916/  4339 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  5812/  3648 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  3632/  3778 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  7634/  1537 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19605, got signal=6
Threads: 2: [m_m] [64.5% done] [  6829/  1037 kb/s] [eta 00m:11s]
Threads: 2: [m_V] [65.6% done] [ 11922/   926 kb/s] [eta 00m:11s]
Threads: 2: [m_V] [66.7% done] [ 12938/  1090 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=19604, got signal=6

fio: (groupid=0): err= 0: pid=19604
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.8%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.1%, 20=0.5%, 50=7.7%, 100=48.6%
     lat (msec): 250=41.1%, 500=1.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19605
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.6%, 8=94.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.0%, 50=9.1%, 100=54.0%
     lat (msec): 250=35.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=19606
  read : io=99MiB, bw=4,589KiB/s, runt= 22716msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  469, avg=72.05, stdev=49.39
    bw (KiB/s) : min=  205, max=13540, per=46.00%, avg=5377.62, stdev=3500.33
  write: io=28,376KiB, bw=1,422KiB/s, runt= 20423msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    3, max=  190, avg=101.83, stdev=25.50
    bw (KiB/s) : min=    0, max= 7059, per=65.22%, avg=2467.82, stdev=2115.64
  cpu          : usr=0.26%, sys=0.30%, ctx=7834
  IO depths    : 1=0.1%, 2=1.0%, 4=15.2%, 8=83.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.4%, 10=4.1%, 20=8.2%, 50=14.7%, 100=40.2%
     lat (msec): 250=31.4%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=253MiB, aggrb=11,690KiB/s, minb=0KiB/s, maxb=4,589KiB/s, mint=22716msec, maxt=22716msec
  WRITE: io=75,480KiB, aggrb=3,784KiB/s, minb=0KiB/s, maxb=1,422KiB/s, mint=22716msec, maxt=22716msec

Disk stats (read/write):
  cciss!c0d0: ios=4802/1516, merge=716/99, ticks=52568/21060, in_queue=73616, util=99.11%
0.22user 0.33system 0:23.06elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
518680inputs+151024outputs (0major+2441minor)pagefaults 0swaps