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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=18378, got signal=6
Threads: 2
Threads: 2: [m_m] [42.9% done] [  6111/ 44271 kb/s] [eta 00m:04s]
Threads: 2: [F_m] [44.4% done] [  4311/ 19525 kb/s] [eta 00m:05s]
Threads: 2: [F_m] [55.6% done] [   690/ 17082 kb/s] [eta 00m:04s]
Threads: 2: [F_m] [66.7% done] [   674/ 10626 kb/s] [eta 00m:03s]
Threads: 2: [F_F] [100.0% done] [     0/  8131 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: 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: [V_V] [68.2% done] [   272/     0 kb/s] [eta 00m:07s]
Threads: 2: [V_V] [72.7% done] [ 21248/     0 kb/s] [eta 00m:06s]
Threads: 2: [V_V] [81.0% done] [ 24697/     0 kb/s] [eta 00m:04s]
Threads: 2: [V_V] [94.7% done] [ 33999/     0 kb/s] [eta 00m:01s]
Threads: 2: [V_V] [100.0% done] [ 33507/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [100.0% done] [ 34389/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [100.0% done] [ 28615/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=18377
  read : io=100MiB, bw=4,932KiB/s, runt= 21257msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  469, avg=41.50, stdev=70.39
    bw (KiB/s) : min=    3, max=25395, per=104.31%, avg=10325.47, stdev=8275.19
  write: io=91,264KiB, bw=6,221KiB/s, runt= 15020msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  278, avg= 1.51, stdev=14.34
    bw (KiB/s) : min=    0, max=46742, per=116.99%, avg=22193.33, stdev=23459.85
  cpu          : usr=3.31%, sys=2.05%, ctx=7385
  IO depths    : 1=1.0%, 2=51.8%, 4=30.5%, 8=16.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=47.7%, 4=5.7%, 10=12.5%, 20=18.6%, 50=4.3%, 100=2.2%
     lat (msec): 250=7.4%, 500=1.3%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18378
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=95.2%, 4=2.8%, 8=1.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=96.5%, 4=0.9%, 10=0.1%, 20=0.0%, 50=0.1%, 100=0.6%
     lat (msec): 250=1.3%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=18379
  read : io=100MiB, bw=4,898KiB/s, runt= 21407msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  543, avg=53.64, stdev=84.43
    bw (KiB/s) : min=    6, max=21848, per=80.04%, avg=7922.83, stdev=6835.70
  write: io=86,876KiB, bw=5,921KiB/s, runt= 15024msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  377, avg= 2.43, stdev=23.68
    bw (KiB/s) : min=    0, max=18318, per=52.34%, avg=9928.00, stdev=9255.34
  cpu          : usr=3.06%, sys=2.15%, ctx=7495
  IO depths    : 1=0.9%, 2=50.4%, 4=28.3%, 8=20.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=46.7%, 4=2.4%, 10=10.6%, 20=19.5%, 50=6.3%, 100=3.6%
     lat (msec): 250=8.5%, 500=2.3%, 750=0.1%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=202MiB, aggrb=9,899KiB/s, minb=0KiB/s, maxb=4,932KiB/s, mint=21407msec, maxt=21407msec
  WRITE: io=272MiB, aggrb=18,970KiB/s, minb=0KiB/s, maxb=6,221KiB/s, mint=21407msec, maxt=21407msec

Disk stats (read/write):
  sda: ios=2454/2253, merge=1138/67190, ticks=49300/1962160, in_queue=2012668, util=99.09%
2.18user 1.20system 0:21.66elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2481minor)pagefaults 0swaps