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] [ 15441/  5554 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [18.2% done] [ 12682/  7602 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [22.7% done] [ 14961/  3498 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [26.1% done] [  4571/ 13893 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [30.4% done] [  6532/ 11828 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [33.3% done] [  8293/  8098 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [37.5% done] [ 11624/  5145 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [40.0% done] [ 12820/  3677 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [44.0% done] [ 14895/   988 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [46.2% done] [  4763/  9217 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [50.0% done] [  3084/ 10240 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [51.9% done] [  9814/  2794 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [55.6% done] [ 10146/  1605 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.1% done] [  8842/  1984 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [60.7% done] [  5938/  3941 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  5392/  3860 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  4864/  2684 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4002, got signal=6
Threads: 2: [m_m] [64.5% done] [  3649/  2950 kb/s] [eta 00m:11s]
Threads: 2: [m_V] [63.6% done] [ 11824/  2795 kb/s] [eta 00m:12s]
Threads: 2: [m_V] [64.7% done] [ 33642/   353 kb/s] [eta 00m:12s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=4001, got signal=6

fio: (groupid=0): err= 0: pid=4001
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.2%, 4=5.5%, 8=94.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=0.0%, 10=0.2%, 20=2.6%, 50=10.2%, 100=34.6%
     lat (msec): 250=49.3%, 500=1.5%, 750=0.6%, 1000=0.5%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4002
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=0.3%, 4=5.5%, 8=94.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.1%, 10=0.1%, 20=1.3%, 50=8.4%, 100=43.8%
     lat (msec): 250=45.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=4003
  read : io=100MiB, bw=4,666KiB/s, runt= 22361msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  479, avg=62.75, stdev=53.93
    bw (KiB/s) : min=   61, max=33403, per=54.31%, avg=5819.90, stdev=7719.91
  write: io=48,904KiB, bw=2,422KiB/s, runt= 20671msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    7, max=  286, avg=100.30, stdev=40.24
    bw (KiB/s) : min=    0, max= 8102, per=56.26%, avg=3387.42, stdev=2872.24
  cpu          : usr=0.59%, sys=0.43%, ctx=7792
  IO depths    : 1=0.1%, 2=2.0%, 4=20.5%, 8=77.3%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.2%, 4=0.7%, 10=12.2%, 20=9.4%, 50=14.5%, 100=29.6%
     lat (msec): 250=32.6%, 500=0.6%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=229MiB, aggrb=10,717KiB/s, minb=0KiB/s, maxb=4,666KiB/s, mint=22361msec, maxt=22361msec
  WRITE: io=119MiB, aggrb=6,021KiB/s, minb=0KiB/s, maxb=2,422KiB/s, mint=22361msec, maxt=22361msec

Disk stats (read/write):
  cciss!c0d0: ios=4443/2522, merge=659/274, ticks=46468/38320, in_queue=84784, util=99.17%
0.25user 0.42system 0:23.40elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
468128inputs+243136outputs (0major+2456minor)pagefaults 0swaps