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=12656, got signal=6
Threads: 2: [m_m] [27.3% done] [  2260/ 81868 kb/s] [eta 00m:08s]
Threads: 2: [m_F] [26.7% done] [  1697/ 13701 kb/s] [eta 00m:11s]
Threads: 2: [m_F] [27.8% done] [  1120/     0 kb/s] [eta 00m:13s]
Threads: 2: [m_F] [28.6% done] [  1392/     0 kb/s] [eta 00m:15s]
Threads: 2: [m_F] [29.2% done] [   784/     0 kb/s] [eta 00m:17s]
Threads: 2: [m_F] [29.6% done] [   832/     0 kb/s] [eta 00m:19s]
Threads: 2: [m_F] [30.0% done] [   776/   500 kb/s] [eta 00m:21s]
Threads: 2: [m_F] [30.3% done] [   920/     0 kb/s] [eta 00m:23s]
Threads: 2: [m_F] [31.4% done] [  1136/     0 kb/s] [eta 00m:24s]
Threads: 2: [m_F] [32.4% done] [  1368/     0 kb/s] [eta 00m:25s]
Threads: 2: [m_F] [33.3% done] [  1040/   632 kb/s] [eta 00m:26s]
Threads: 2: [m_F] [34.1% done] [  1144/     0 kb/s] [eta 00m:27s]
Threads: 2: [m_F] [34.9% done] [  1188/   336 kb/s] [eta 00m:28s]
Threads: 2: [m_V] [35.6% done] [  9720/     0 kb/s] [eta 00m:29s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=12655, got signal=6
Threads: 1: [__V] [94.4% done] [ 30568/ 48096 kb/s] [eta 00m:01s]
Threads: 1: [__V] [100.0% done] [ 37260/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=12655
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.4%, 2=84.0%, 4=3.5%, 8=12.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=77.8%, 4=5.6%, 10=0.9%, 20=0.8%, 50=0.4%, 100=0.2%
     lat (msec): 250=1.4%, 500=2.8%, 750=8.0%, 1000=1.7%, >=2000=0.2%
fio: (groupid=0): err= 0: pid=12656
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.7%, 2=93.3%, 4=3.9%, 8=2.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=87.8%, 4=4.7%, 10=1.9%, 20=2.9%, 50=0.6%, 100=0.1%
     lat (msec): 250=0.5%, 500=0.4%, 750=0.6%, 1000=0.3%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12657
  read : io=100MiB, bw=5,496KiB/s, runt= 19061msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  631, avg=28.71, stdev=73.13
    bw (KiB/s) : min=    2, max=37806, per=203.36%, avg=13285.79, stdev=15665.88
  write: io=92,676KiB, bw=6,091KiB/s, runt= 15580msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  591, avg= 3.49, stdev=32.91
    bw (KiB/s) : min=    0, max=36033, per=90.47%, avg=16531.67, stdev=18199.13
  cpu          : usr=3.65%, sys=1.95%, ctx=4809
  IO depths    : 1=1.4%, 2=55.0%, 4=30.7%, 8=12.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.9%, 4=0.1%, 10=22.3%, 20=15.9%, 50=7.4%, 100=1.7%
     lat (msec): 250=1.8%, 500=1.2%, 750=0.5%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=119MiB, aggrb=6,533KiB/s, minb=0KiB/s, maxb=5,496KiB/s, mint=19061msec, maxt=19061msec
  WRITE: io=272MiB, aggrb=18,273KiB/s, minb=0KiB/s, maxb=6,091KiB/s, mint=19061msec, maxt=19061msec

Disk stats (read/write):
  sda: ios=1529/2213, merge=449/55086, ticks=44012/1972432, in_queue=2019440, util=97.99%
2.53user 0.85system 0:19.50elapsed 17%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2483minor)pagefaults 0swaps