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: [mmm] [13.0% done] [ 10376/ 10864 kb/s] [eta 00m:20s]
Threads: 3: [mmm] [17.4% done] [  7600/ 12732 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [20.8% done] [ 10332/  7968 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [25.0% done] [ 10804/  8424 kb/s] [eta 00m:18s]
Threads: 3: [mmm] [29.2% done] [  9100/  9516 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [32.0% done] [ 10820/  5860 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [36.0% done] [ 10920/  3816 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [38.5% done] [  9100/  6280 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [40.7% done] [  8276/  4912 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [44.4% done] [ 12496/   392 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [46.4% done] [  9608/  3096 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [50.0% done] [  5280/  7692 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [51.7% done] [  8016/  2088 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [55.2% done] [  7196/  2148 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [56.7% done] [  7148/  2276 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [58.1% done] [  7932/     0 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [59.4% done] [  8320/     0 kb/s] [eta 00m:13s]
Threads: 3: [mVm] [60.6% done] [ 14528/  1932 kb/s] [eta 00m:13s]
Threads: 3: [mVm] [61.8% done] [ 17268/   368 kb/s] [eta 00m:13s]
Threads: 2: [m_m] [62.9% done] [ 10612/   600 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27342, got signal=6
Threads: 1: [__m] [63.9% done] [  5756/  1724 kb/s] [eta 00m:13s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27344, got signal=6

fio: (groupid=0): err= 0: pid=27342
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.3%, 2=1.4%, 4=28.2%, 8=70.1%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.5%, 20=1.6%, 50=14.6%, 100=31.1%
     lat (msec): 250=48.6%, 500=1.8%, 750=0.5%, 1000=0.8%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27343
  read : io=100MiB, bw=4,767KiB/s, runt= 21901msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  279, avg=77.88, stdev=48.80
    bw (KiB/s) : min=  109, max=19716, per=47.71%, avg=5231.73, stdev=4967.00
  write: io=36,020KiB, bw=1,884KiB/s, runt= 19572msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    0, max=  289, avg=93.64, stdev=54.46
    bw (KiB/s) : min=    0, max= 9557, per=64.40%, avg=3645.46, stdev=3061.33
  cpu          : usr=0.31%, sys=0.66%, ctx=4862
  IO depths    : 1=0.5%, 2=2.5%, 4=34.4%, 8=62.6%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.6%, 4=0.0%, 10=1.3%, 20=3.9%, 50=29.6%, 100=29.3%
     lat (msec): 250=34.5%, 500=0.4%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27344
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=1.0%, 2=3.7%, 4=34.8%, 8=60.5%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.8%, 4=0.1%, 10=3.2%, 20=2.9%, 50=18.4%, 100=25.7%
     lat (msec): 250=43.8%, 500=3.5%, 750=0.5%, 1000=0.7%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=229MiB, aggrb=10,965KiB/s, minb=0KiB/s, maxb=4,767KiB/s, mint=0msec, maxt=21901msec
  WRITE: io=106MiB, aggrb=5,661KiB/s, minb=0KiB/s, maxb=1,884KiB/s, mint=0msec, maxt=21901msec

Disk stats (read/write):
  sda: ios=4052/1710, merge=639/149, ticks=50344/64048, in_queue=114380, util=99.05%
0.26user 0.36system 0:24.64elapsed 2%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+2469minor)pagefaults 0swaps