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=12303, got signal=6
Threads: 2
Threads: 2: [m_m] [11.1% done] [  7061/ 34335 kb/s] [eta 00m:24s]
Threads: 2: [F_F] [100.0% done] [  1433/ 89178 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: [F_F] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_F] [72.2% done] [  4032/     0 kb/s] [eta 00m:05s]
Threads: 2: [V_F] [77.8% done] [  6782/     0 kb/s] [eta 00m:04s]
Threads: 2: [V_F] [78.9% done] [  5671/     0 kb/s] [eta 00m:04s]
Threads: 2: [V_F] [84.2% done] [  7794/     0 kb/s] [eta 00m:03s]
Threads: 2: [V_F] [89.5% done] [  9783/     0 kb/s] [eta 00m:02s]
Threads: 2: [V_F] [100.0% done] [ 13824/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [70.4% done] [ 21933/     0 kb/s] [eta 00m:08s]
Threads: 2: [V_V] [80.8% done] [ 30775/     0 kb/s] [eta 00m:05s]
Threads: 2: [V_V] [91.7% done] [ 30011/     0 kb/s] [eta 00m:02s]
Threads: 1: [__V] [100.0% done] [ 33823/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=12302
  read : io=100MiB, bw=4,765KiB/s, runt= 21997msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  579, avg=53.67, stdev=75.46
    bw (KiB/s) : min=    9, max=30256, per=85.79%, avg=7825.08, stdev=7089.20
  write: io=96,980KiB, bw=7,601KiB/s, runt= 13064msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  339, avg= 1.59, stdev=17.07
    bw (KiB/s) : min=    0, max=24231, per=99.61%, avg=15139.33, stdev=13199.09
  cpu          : usr=3.64%, sys=1.91%, ctx=4923
  IO depths    : 1=2.4%, 2=55.8%, 4=29.0%, 8=12.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.7%, 4=1.1%, 10=10.7%, 20=14.3%, 50=7.7%, 100=7.0%
     lat (msec): 250=8.7%, 500=1.3%, 750=0.2%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12303
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=94.0%, 4=2.8%, 8=3.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=92.7%, 4=2.9%, 10=0.4%, 20=0.1%, 50=0.2%, 100=0.7%
     lat (msec): 250=2.4%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=12304
  read : io=100MiB, bw=4,463KiB/s, runt= 23490msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  547, avg=36.41, stdev=67.08
    bw (KiB/s) : min=    1, max=34447, per=128.84%, avg=11751.67, stdev=11324.29
  write: io=84,896KiB, bw=4,612KiB/s, runt= 18848msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  119, avg= 0.51, stdev= 5.31
    bw (KiB/s) : min=    0, max=139001, per=457.30%, avg=69500.50, stdev=98288.55
  cpu          : usr=2.76%, sys=1.60%, ctx=5085
  IO depths    : 1=2.9%, 2=55.9%, 4=28.4%, 8=12.9%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.7%, 4=0.2%, 10=14.0%, 20=21.2%, 50=7.7%, 100=2.0%
     lat (msec): 250=4.4%, 500=1.5%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=204MiB, aggrb=9,121KiB/s, minb=0KiB/s, maxb=4,765KiB/s, mint=23490msec, maxt=23490msec
  WRITE: io=273MiB, aggrb=15,198KiB/s, minb=0KiB/s, maxb=7,601KiB/s, mint=23490msec, maxt=23490msec

Disk stats (read/write):
  sda: ios=2455/2758, merge=1126/66981, ticks=51452/2419912, in_queue=2513544, util=97.96%
2.32user 1.09system 0:23.87elapsed 14%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2489minor)pagefaults 0swaps