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
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=23451, got signal=6
Threads: 2
Threads: 2
Threads: 2: [_FF] [100.0% done] [   215/ 40334 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FF] [100.0% done] [     0/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FV] [70.6% done] [  2816/     0 kb/s] [eta 00m:05s]
Threads: 2: [_FV] [76.5% done] [  8179/     0 kb/s] [eta 00m:04s]
Threads: 2: [_FV] [87.5% done] [ 18992/     0 kb/s] [eta 00m:02s]
Threads: 2: [_FV] [93.8% done] [ 10536/     0 kb/s] [eta 00m:01s]
Threads: 2: [_FV] [100.0% done] [  7728/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FV] [100.0% done] [ 17351/     0 kb/s] [eta 00m:00s]
Threads: 2: [_FV] [100.0% done] [  5407/     0 kb/s] [eta 00m:00s]
Threads: 2: [_VV] [70.4% done] [ 19679/     0 kb/s] [eta 00m:08s]
Threads: 1: [_V_] [87.0% done] [ 34568/     0 kb/s] [eta 00m:03s]
Threads: 1: [_V_] [100.0% done] [ 36014/     0 kb/s] [eta 00m:00s]
Threads: 1: [_V_] [100.0% done] [ 33722/     0 kb/s] [eta 00m:00s]
fio: (groupid=0): err= 0: pid=23451
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.2%, 2=92.1%, 4=7.5%, 8=0.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=96.4%, 4=2.0%, 10=0.8%, 20=0.4%, 50=0.0%, 100=0.0%
     lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23452
  read : io=100MiB, bw=4,708KiB/s, runt= 22269msec
    slat (msec): min=    0, max=   10, avg= 0.14, stdev= 1.20
    clat (msec): min=    0, max=  502, avg=20.73, stdev=41.67
    bw (KiB/s) : min=    4, max=36528, per=186.78%, avg=17589.20, stdev=15110.71
  write: io=95,916KiB, bw=5,272KiB/s, runt= 18628msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  127, avg= 0.83, stdev= 7.55
    bw (KiB/s) : min=    0, max=46577, per=143.61%, avg=23288.50, stdev=32934.91
  cpu          : usr=3.41%, sys=1.58%, ctx=7689
  IO depths    : 1=0.9%, 2=51.9%, 4=31.3%, 8=15.8%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.3%, 4=5.5%, 10=14.1%, 20=23.6%, 50=4.4%, 100=1.4%
     lat (msec): 250=2.3%, 500=0.2%, 750=0.1%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=23453
  read : io=100MiB, bw=5,242KiB/s, runt= 20001msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  395, avg=48.51, stdev=62.85
    bw (KiB/s) : min=   24, max=29007, per=98.14%, avg=9241.67, stdev=7656.34
  write: io=96,752KiB, bw=8,740KiB/s, runt= 11335msec
    slat (msec): min=    0, max=    1, avg= 0.00, stdev= 0.03
    clat (msec): min=    0, max=  259, avg= 1.04, stdev=13.37
    bw (KiB/s) : min=    0, max=25555, per=78.80%, avg=12777.50, stdev=18070.11
  cpu          : usr=4.02%, sys=1.92%, ctx=7126
  IO depths    : 1=0.7%, 2=51.9%, 4=30.4%, 8=17.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.4%, 4=3.9%, 10=8.6%, 20=17.0%, 50=5.9%, 100=6.0%
     lat (msec): 250=9.3%, 500=0.9%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=200MiB, aggrb=9,417KiB/s, minb=0KiB/s, maxb=5,242KiB/s, mint=20001msec, maxt=22269msec
  WRITE: io=288MiB, aggrb=16,216KiB/s, minb=0KiB/s, maxb=8,740KiB/s, mint=20001msec, maxt=22269msec

Disk stats (read/write):
  sda: ios=2229/2717, merge=872/70791, ticks=47672/2266404, in_queue=2392484, util=98.95%
2.38user 0.99system 0:22.63elapsed 14%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2509minor)pagefaults 0swaps