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] [ 12930/  8484 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [16.7% done] [  9509/  8879 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [20.0% done] [ 10168/ 10258 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [24.0% done] [ 10087/  7915 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [28.0% done] [ 11686/  7716 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [32.0% done] [ 10168/  7829 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [34.6% done] [ 12186/  5422 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [38.5% done] [  8456/  7724 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [42.3% done] [ 11226/  3957 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.4% done] [ 12767/  2348 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [48.1% done] [ 12987/   984 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [ 10144/  2037 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.7% done] [  5430/  4653 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [55.2% done] [  8163/  2635 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  6154/  3160 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=790, got signal=6
Threads: 2: [mm_] [58.1% done] [  7406/  1313 kb/s] [eta 00m:13s]
Threads: 2: [mm_] [59.4% done] [  6097/  2619 kb/s] [eta 00m:13s]
Threads: 2: [mV_] [60.6% done] [ 16042/   398 kb/s] [eta 00m:13s]
Threads: 1: [m__] [61.8% done] [ 17335/   504 kb/s] [eta 00m:13s]
Threads: 1: [m__] [66.7% done] [  8236/     0 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=788, got signal=6

fio: (groupid=0): err= 0: pid=788
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=8.4%, 8=91.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.2%, 20=4.2%, 50=17.6%, 100=19.1%
     lat (msec): 250=55.0%, 500=2.7%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=789
  read : io=100MiB, bw=4,953KiB/s, runt= 21075msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    1, max=  419, avg=68.84, stdev=45.32
    bw (KiB/s) : min=  325, max=20112, per=47.78%, avg=5485.61, stdev=4893.15
  write: io=30,252KiB, bw=1,592KiB/s, runt= 19447msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   30, max=  183, avg=92.42, stdev=33.09
    bw (KiB/s) : min=    0, max= 9350, per=45.94%, avg=2432.88, stdev=3005.37
  cpu          : usr=0.25%, sys=0.63%, ctx=7410
  IO depths    : 1=0.1%, 2=0.8%, 4=14.9%, 8=84.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.5%, 10=3.8%, 20=7.2%, 50=20.0%, 100=41.9%
     lat (msec): 250=25.6%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=790
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.2%, 4=6.2%, 8=93.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.2%, 20=1.3%, 50=10.0%, 100=59.6%
     lat (msec): 250=28.5%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=231MiB, aggrb=11,482KiB/s, minb=0KiB/s, maxb=4,953KiB/s, mint=0msec, maxt=21075msec
  WRITE: io=98MiB, aggrb=5,296KiB/s, minb=0KiB/s, maxb=1,592KiB/s, mint=0msec, maxt=21075msec

Disk stats (read/write):
  cciss!c0d0: ios=4456/1869, merge=570/152, ticks=46308/29356, in_queue=75652, util=99.18%
0.20user 0.32system 0:22.73elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
472816inputs+201200outputs (0major+2442minor)pagefaults 0swaps