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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3700, got signal=6
Threads: 2: [_mm] [33.3% done] [ 18972/ 40955 kb/s] [eta 00m:06s]
Threads: 2: [_mm] [44.4% done] [ 12958/ 24214 kb/s] [eta 00m:05s]
Threads: 2: [_mm] [55.6% done] [  9191/ 26672 kb/s] [eta 00m:04s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=3701, got signal=6
Threads: 1: [__m] [54.5% done] [  1446/ 12296 kb/s] [eta 00m:05s]
Threads: 1: [__m] [58.3% done] [  1499/     0 kb/s] [eta 00m:05s]
Threads: 1: [__m] [57.1% done] [  1296/     0 kb/s] [eta 00m:06s]
Threads: 1: [__F] [100.0% done] [   463/ 16176 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] [80.0% done] [ 19325/     0 kb/s] [eta 00m:04s]
fio: (groupid=0): err= 0: pid=3700
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.6%, 2=85.5%, 4=8.4%, 8=5.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=77.2%, 4=14.4%, 10=2.2%, 20=0.1%, 50=0.6%, 100=2.3%
     lat (msec): 250=2.9%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3701
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.5%, 2=71.1%, 4=4.3%, 8=24.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=60.3%, 4=11.1%, 10=0.7%, 20=0.4%, 50=5.1%, 100=19.1%
     lat (msec): 250=2.8%, 500=0.2%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=3702
  read : io=100MiB, bw=6,144KiB/s, runt= 17064msec
    slat (msec): min=    0, max=    3, avg= 0.01, stdev= 0.13
    clat (msec): min=    0, max=  424, avg=41.98, stdev=69.89
    bw (KiB/s) : min=    8, max=41577, per=97.62%, avg=8519.63, stdev=11964.22
  write: io=62,024KiB, bw=4,072KiB/s, runt= 15594msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  164, avg= 1.31, stdev= 7.30
    bw (KiB/s) : min=    1, max=11319, per=36.26%, avg=5325.00, stdev=5688.67
  cpu          : usr=8.37%, sys=3.73%, ctx=7561
  IO depths    : 1=13.2%, 2=36.1%, 4=25.1%, 8=25.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=38.9%, 4=8.9%, 10=21.3%, 20=7.4%, 50=6.8%, 100=10.4%
     lat (msec): 250=4.0%, 500=2.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=142MiB, aggrb=8,727KiB/s, minb=0KiB/s, maxb=6,144KiB/s, mint=17064msec, maxt=17064msec
  WRITE: io=218MiB, aggrb=14,687KiB/s, minb=0KiB/s, maxb=4,072KiB/s, mint=17064msec, maxt=17064msec

Disk stats (read/write):
  cciss!c0d0: ios=2242/3920, merge=6017/51890, ticks=59264/1506980, in_queue=1567412, util=98.17%
3.95user 1.23system 0:17.38elapsed 29%CPU (0avgtext+0avgdata 0maxresident)k
358616inputs+447576outputs (0major+2460minor)pagefaults 0swaps