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
Threads: 3: [mFF] [12.0% done] [  1893/     0 kb/s] [eta 00m:22s]
Threads: 3: [mFF] [12.9% done] [  1653/     0 kb/s] [eta 00m:27s]
Threads: 3: [mFF] [13.9% done] [  1251/   520 kb/s] [eta 00m:31s]
Threads: 3: [mFF] [16.2% done] [  3502/     0 kb/s] [eta 00m:31s]
Threads: 3: [mFF] [63.6% done] [  1210/ 70574 kb/s] [eta 00m:04s]
Threads: 3: [FFF] [100.0% done] [     0/  7143 kb/s] [eta 00m:00s]
Threads: 3: [FFF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 3: [FFF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 3: [FFF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=8321, got signal=6
Threads: 2: [V_V] [75.0% done] [ 16388/     0 kb/s] [eta 00m:04s]
Threads: 2: [V_V] [86.7% done] [ 40557/     0 kb/s] [eta 00m:02s]
Threads: 2: [V_V] [100.0% done] [ 40972/     0 kb/s] [eta 00m:00s]
Threads: 2: [V_V] [100.0% done] [ 39659/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=8320
  read : io=100MiB, bw=6,496KiB/s, runt= 16141msec
    slat (msec): min=    0, max=    3, avg= 0.02, stdev= 0.22
    clat (msec): min=    0, max=  911, avg=52.94, stdev=110.49
    bw (KiB/s) : min=    0, max=21146, per=69.36%, avg=9092.43, stdev=7766.86
  write: io=77,016KiB, bw=6,765KiB/s, runt= 11656msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  764, avg= 3.00, stdev=36.18
    bw (KiB/s) : min=    0, max=138649, per=191.65%, avg=46320.33, stdev=79959.12
  cpu          : usr=3.92%, sys=1.83%, ctx=6051
  IO depths    : 1=0.9%, 2=49.7%, 4=29.3%, 8=20.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=46.9%, 4=3.5%, 10=11.4%, 20=23.1%, 50=2.4%, 100=2.4%
     lat (msec): 250=7.5%, 500=1.5%, 750=0.9%, 1000=0.3%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8321
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=94.1%, 4=3.6%, 8=2.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=92.7%, 4=3.3%, 10=0.9%, 20=0.1%, 50=0.2%, 100=1.1%
     lat (msec): 250=1.3%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=8322
  read : io=100MiB, bw=6,471KiB/s, runt= 16202msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  219, avg=24.63, stdev=40.20
    bw (KiB/s) : min=    4, max=27123, per=116.09%, avg=15218.75, stdev=10438.79
  write: io=98,324KiB, bw=8,640KiB/s, runt= 11653msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   67, avg= 0.30, stdev= 2.26
    bw (KiB/s) : min=    0, max=125878, per=173.69%, avg=41980.00, stdev=72657.81
  cpu          : usr=4.84%, sys=2.39%, ctx=6134
  IO depths    : 1=1.1%, 2=53.7%, 4=31.9%, 8=13.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.1%, 4=5.8%, 10=18.0%, 20=18.6%, 50=0.8%, 100=1.0%
     lat (msec): 250=6.5%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=203MiB, aggrb=13,109KiB/s, minb=0KiB/s, maxb=6,496KiB/s, mint=16202msec, maxt=16202msec
  WRITE: io=269MiB, aggrb=24,169KiB/s, minb=0KiB/s, maxb=8,640KiB/s, mint=16202msec, maxt=16202msec

Disk stats (read/write):
  sda: ios=2107/1496, merge=921/67081, ticks=26380/1419880, in_queue=1447244, util=98.55%
2.32user 1.05system 0:16.48elapsed 20%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2485minor)pagefaults 0swaps