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] [11.5% done] [    68/ 30916 kb/s] [eta 00m:23s]
Threads: 3: [mFF] [11.4% done] [     0/     0 kb/s] [eta 00m:31s]
Threads: 3: [mFF] [11.6% done] [   140/     0 kb/s] [eta 00m:38s]
Threads: 3: [mFF] [11.5% done] [     0/     0 kb/s] [eta 00m:46s]
Threads: 3: [mFF] [12.7% done] [  1336/   308 kb/s] [eta 00m:48s]
Threads: 3: [mFF] [13.3% done] [   332/     0 kb/s] [eta 00m:52s]
Threads: 3: [mFF] [15.0% done] [   116/     0 kb/s] [eta 00m:51s]
Threads: 3: [mFF] [16.7% done] [   160/     0 kb/s] [eta 00m:50s]
Threads: 3: [mVV] [18.3% done] [  7696/     0 kb/s] [eta 00m:49s]
Threads: 3: [mVV] [20.0% done] [ 33324/     0 kb/s] [eta 00m:48s]
Threads: 3: [mVV] [39.4% done] [ 31156/ 37968 kb/s] [eta 00m:20s]
Threads: 3: [mVV] [40.0% done] [ 38140/     0 kb/s] [eta 00m:21s]
Threads: 3: [mVV] [39.5% done] [ 38076/     0 kb/s] [eta 00m:23s]
Threads: 3: [mVV] [40.0% done] [ 22444/     0 kb/s] [eta 00m:24s]
Threads: 2: [mV_] [54.8% done] [ 25432/ 22944 kb/s] [eta 00m:14s]
Threads: 1: [m__] [56.2% done] [  6116/     0 kb/s] [eta 00m:14s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=5327, got signal=6

fio: (groupid=0): err= 0: pid=5327
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=89.4%, 4=3.6%, 8=6.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=87.4%, 4=3.1%, 10=0.6%, 20=0.2%, 50=0.3%, 100=1.6%
     lat (msec): 250=0.8%, 500=0.7%, 750=0.7%, 1000=0.9%, >=2000=2.2%
fio: (groupid=0): err= 0: pid=5328
  read : io=100MiB, bw=5,915KiB/s, runt= 17721msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max= 1067, avg=37.97, stdev=91.70
    bw (KiB/s) : min=   13, max=24576, per=91.30%, avg=11423.86, stdev=7239.33
  write: io=99,180KiB, bw=9,480KiB/s, runt= 10712msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  459, avg= 1.30, stdev=14.37
    bw (KiB/s) : min=    0, max=105242, per=189.93%, avg=52621.00, stdev=74417.33
  cpu          : usr=4.76%, sys=2.17%, ctx=6383
  IO depths    : 1=1.6%, 2=54.8%, 4=32.2%, 8=11.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=48.5%, 4=1.1%, 10=21.4%, 20=18.1%, 50=3.0%, 100=0.4%
     lat (msec): 250=6.0%, 500=0.8%, 750=0.2%, 1000=0.2%, >=2000=0.1%
fio: (groupid=0): err= 0: pid=5329
  read : io=100MiB, bw=6,088KiB/s, runt= 17222msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  731, avg=35.51, stdev=73.36
    bw (KiB/s) : min=    9, max=22396, per=99.99%, avg=12510.29, stdev=8322.59
  write: io=98MiB, bw=9,686KiB/s, runt= 10592msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=   62, avg= 0.39, stdev= 2.42
    bw (KiB/s) : min=    0, max=39947, per=72.09%, avg=19973.50, stdev=28246.79
  cpu          : usr=4.95%, sys=2.55%, ctx=6127
  IO depths    : 1=1.7%, 2=55.1%, 4=31.8%, 8=11.4%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=49.6%, 4=1.2%, 10=21.0%, 20=17.4%, 50=3.4%, 100=0.9%
     lat (msec): 250=5.6%, 500=0.8%, 750=0.2%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=211MiB, aggrb=12,512KiB/s, minb=0KiB/s, maxb=6,088KiB/s, mint=17222msec, maxt=17721msec
  WRITE: io=283MiB, aggrb=27,706KiB/s, minb=0KiB/s, maxb=9,686KiB/s, mint=17222msec, maxt=17721msec

Disk stats (read/write):
  sda: ios=2222/2144, merge=848/59912, ticks=76076/1681684, in_queue=1757852, util=97.76%
2.54user 1.06system 0:19.59elapsed 18%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2474minor)pagefaults 0swaps