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=14146, got signal=6
Threads: 2
Threads: 2: [m_F] [30.0% done] [  1795/ 35473 kb/s] [eta 00m:07s]
Threads: 2: [m_F] [40.0% done] [  1063/ 12205 kb/s] [eta 00m:06s]
Threads: 2: [m_F] [41.7% done] [   870/  1264 kb/s] [eta 00m:07s]
Threads: 2: [F_F] [100.0% done] [   122/ 41334 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_V] [71.4% done] [ 11035/     0 kb/s] [eta 00m:06s]
Threads: 2: [V_V] [80.0% done] [ 29597/     0 kb/s] [eta 00m:04s]
Threads: 2: [V_V] [89.5% done] [ 30605/     0 kb/s] [eta 00m:02s]
Threads: 2: [V_V] [100.0% done] [ 37269/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [100.0% done] [ 36619/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [100.0% done] [ 29483/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=14145
  read : io=100MiB, bw=4,919KiB/s, runt= 21314msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  756, avg=49.05, stdev=98.78
    bw (KiB/s) : min=    9, max=22934, per=82.66%, avg=8229.77, stdev=7652.40
  write: io=91,688KiB, bw=6,282KiB/s, runt= 14944msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  659, avg= 4.21, stdev=40.42
    bw (KiB/s) : min=    0, max=21255, per=53.66%, avg=10724.67, stdev=10628.83
  cpu          : usr=3.42%, sys=1.58%, ctx=4198
  IO depths    : 1=3.5%, 2=58.4%, 4=27.0%, 8=11.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.8%, 4=0.3%, 10=15.7%, 20=15.9%, 50=7.5%, 100=1.7%
     lat (msec): 250=5.9%, 500=2.7%, 750=0.5%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=14146
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.8%, 2=91.8%, 4=5.3%, 8=2.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=92.8%, 4=2.4%, 10=0.6%, 20=1.2%, 50=0.4%, 100=0.8%
     lat (msec): 250=1.8%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=14147
  read : io=100MiB, bw=4,954KiB/s, runt= 21162msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  297, avg=30.48, stdev=47.04
    bw (KiB/s) : min=   15, max=22487, per=135.89%, avg=13529.50, stdev=8024.03
  write: io=98MiB, bw=6,864KiB/s, runt= 14924msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  191, avg= 0.73, stdev= 8.96
    bw (KiB/s) : min=    0, max=52727, per=131.91%, avg=26363.50, stdev=37283.62
  cpu          : usr=4.01%, sys=1.80%, ctx=4124
  IO depths    : 1=3.3%, 2=59.2%, 4=28.6%, 8=9.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=50.6%, 4=0.5%, 10=16.7%, 20=16.1%, 50=7.7%, 100=1.8%
     lat (msec): 250=6.1%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=202MiB, aggrb=9,956KiB/s, minb=0KiB/s, maxb=4,954KiB/s, mint=21162msec, maxt=21314msec
  WRITE: io=285MiB, aggrb=19,986KiB/s, minb=0KiB/s, maxb=6,864KiB/s, mint=21162msec, maxt=21314msec

Disk stats (read/write):
  sda: ios=2212/2427, merge=942/70336, ticks=37832/2082476, in_queue=2122820, util=98.35%
2.43user 1.02system 0:21.83elapsed 15%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2470minor)pagefaults 0swaps