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=17897, got signal=6
Threads: 2: [m_F] [9.1% done] [  5080/ 44644 kb/s] [eta 00m:30s]
Threads: 2: [m_F] [44.4% done] [   792/ 48756 kb/s] [eta 00m:05s]
Threads: 2: [m_F] [45.5% done] [   792/     0 kb/s] [eta 00m:06s]
Threads: 2: [m_F] [42.9% done] [  1080/   528 kb/s] [eta 00m:08s]
Threads: 2: [m_F] [43.8% done] [  1040/     0 kb/s] [eta 00m:09s]
Threads: 2: [F_F] [100.0% done] [   204/ 35372 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [F_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] [ 17564/     0 kb/s] [eta 00m:04s]
Threads: 1: [V__] [100.0% done] [ 34204/     0 kb/s] [eta 00m:00s]
Threads: 1: [V__] [100.0% done] [ 32048/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=17896
  read : io=100MiB, bw=5,656KiB/s, runt= 18538msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  799, avg=40.24, stdev=101.65
    bw (KiB/s) : min=    0, max=36544, per=160.09%, avg=9986.16, stdev=13275.50
  write: io=84,656KiB, bw=5,522KiB/s, runt= 15697msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  722, avg= 4.81, stdev=44.72
    bw (KiB/s) : min=    0, max=33678, per=62.19%, avg=11313.00, stdev=19369.10
  cpu          : usr=3.45%, sys=2.37%, ctx=5133
  IO depths    : 1=1.5%, 2=52.7%, 4=29.5%, 8=16.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.5%, 4=1.8%, 10=19.0%, 20=18.7%, 50=5.4%, 100=0.9%
     lat (msec): 250=2.6%, 500=2.1%, 750=0.9%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17897
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=90.7%, 4=2.9%, 8=6.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=91.3%, 4=0.5%, 10=0.3%, 20=0.2%, 50=0.6%, 100=1.7%
     lat (msec): 250=4.9%, 500=0.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=17898
  read : io=0KiB, bw=0KiB/s, runt= 12588msec
  write: io=100MiB, bw=8,367KiB/s, runt= 12532msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=    3, avg= 0.18, stdev= 0.40
    bw (KiB/s) : min=    0, max=126976, per=349.01%, avg=63488.00, stdev=89785.59
  cpu          : usr=6.42%, sys=2.64%, ctx=3508
  IO depths    : 1=0.3%, 2=98.4%, 4=1.3%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=99.0%, 4=0.4%, 10=0.0%, 20=0.0%, 50=0.0%, 100=0.0%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=110MiB, aggrb=6,238KiB/s, minb=0KiB/s, maxb=5,656KiB/s, mint=12588msec, maxt=18538msec
  WRITE: io=272MiB, aggrb=18,191KiB/s, minb=0KiB/s, maxb=8,367KiB/s, mint=12588msec, maxt=18538msec

Disk stats (read/write):
  sda: ios=1428/2551, merge=544/66778, ticks=23652/1992412, in_queue=2038644, util=98.40%
2.24user 1.05system 0:18.90elapsed 17%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2480minor)pagefaults 0swaps