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. Threads: 3 fio: pid=5190, got signal=6 Threads: 2 Threads: 2: [mF_] [21.4% done] [ 929/ 0 kb/s] [eta 00m:11s] Threads: 2: [mF_] [21.1% done] [ 921/ 0 kb/s] [eta 00m:15s] Threads: 2: [mF_] [25.0% done] [ 1602/ 3540 kb/s] [eta 00m:15s] Threads: 2: [mF_] [27.3% done] [ 1004/ 2485 kb/s] [eta 00m:16s] Threads: 2: [mF_] [28.0% done] [ 988/ 720 kb/s] [eta 00m:18s] Threads: 2: [mF_] [28.6% done] [ 1224/ 0 kb/s] [eta 00m:20s] Threads: 2: [mF_] [31.0% done] [ 740/ 2075 kb/s] [eta 00m:20s] Threads: 2: [mF_] [31.2% done] [ 756/ 0 kb/s] [eta 00m:22s] Threads: 2: [mF_] [31.4% done] [ 929/ 0 kb/s] [eta 00m:24s] Threads: 2: [mF_] [33.3% done] [ 1669/ 760 kb/s] [eta 00m:24s] Threads: 2: [mF_] [34.2% done] [ 1079/ 0 kb/s] [eta 00m:25s] Threads: 2: [mF_] [35.0% done] [ 1138/ 0 kb/s] [eta 00m:26s] Threads: 2: [mV_] [35.7% done] [ 9556/ 0 kb/s] [eta 00m:27s] Threads: 2: [mV_] [35.6% done] [ 22575/ 0 kb/s] [eta 00m:29s] Threads: 2: [FV_] [100.0% done] [ 32012/ 47187 kb/s] [eta 00m:00s] Threads: 2: [FV_] [100.0% done] [ 14651/ 0 kb/s] [eta 00m:00s] Threads: 1: [FE_] [100.0% done] [ 20752/ 0 kb/s] [eta 00m:00s] Threads: 1: [F__] [100.0% done] [ 0/ 0 kb/s] [eta 00m:00s] Threads: 1: [V__] [73.3% done] [ 8983/ 0 kb/s] [eta 00m:08s] Threads: 1: [V__] [92.0% done] [ 25363/ 0 kb/s] [eta 00m:02s] Threads: 1: [V__] [100.0% done] [ 30328/ 0 kb/s] [eta 00m:00s] fio: (groupid=0): err= 0: pid=5188 read : io=100MiB, bw=4,331KiB/s, runt= 24206msec slat (msec): min= 0, max= 0, avg= 0.00, stdev= 0.00 clat (msec): min= 0, max= 1551, avg=87.74, stdev=200.38 bw (KiB/s) : min= 19, max=32816, per=58.23%, avg=5044.86, stdev=8918.39 write: io=72,080KiB, bw=3,462KiB/s, runt= 21320msec slat (msec): min= 0, max= 0, avg= 0.00, stdev= 0.00 clat (msec): min= 0, max= 847, avg=11.00, stdev=67.76 bw (KiB/s) : min= 0, max= 4438, per=11.67%, avg=1533.33, stdev=1966.07 cpu : usr=2.61%, sys=1.42%, ctx=4632 IO depths : 1=2.9%, 2=52.3%, 4=28.1%, 8=16.7%, 16=0.0%, 32=0.0%, >=64=0.0% lat (msec): 2=45.4%, 4=0.6%, 10=10.0%, 20=20.4%, 50=10.6%, 100=3.5% lat (msec): 250=2.2%, 500=2.7%, 750=3.4%, 1000=0.6%, >=2000=0.4% fio: (groupid=0): err= 0: pid=5189 read : io=100MiB, bw=5,297KiB/s, runt= 19793msec slat (msec): min= 0, max= 0, avg= 0.00, stdev= 0.00 clat (msec): min= 0, max= 355, avg=23.47, stdev=38.29 bw (KiB/s) : min= 14, max=32228, per=207.92%, avg=18012.09, stdev=10230.36 write: io=99,140KiB, bw=6,826KiB/s, runt= 14872msec slat (msec): min= 0, max= 0, avg= 0.00, stdev= 0.00 clat (msec): min= 0, max= 194, avg= 0.62, stdev= 7.56 bw (KiB/s) : min= 0, max=126246, per=480.46%, avg=63123.00, stdev=89269.40 cpu : usr=4.61%, sys=2.04%, ctx=4168 IO depths : 1=3.3%, 2=59.2%, 4=28.6%, 8=8.9%, 16=0.0%, 32=0.0%, >=64=0.0% lat (msec): 2=51.3%, 4=0.7%, 10=16.6%, 20=18.2%, 50=6.8%, 100=4.4% lat (msec): 250=1.6%, 500=0.2%, 750=0.0%, 1000=0.0%, >=2000=0.0% fio: (groupid=0): err= 0: pid=5190 cpu : usr=0.00%, sys=0.00%, ctx=0 IO depths : 1=0.2%, 2=98.3%, 4=1.5%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% lat (msec): 2=99.1%, 4=0.4%, 10=0.1%, 20=0.0%, 50=0.0%, 100=0.0% lat (msec): 250=0.0%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0% Run status group 0 (all jobs): READ: io=200MiB, aggrb=8,663KiB/s, minb=0KiB/s, maxb=5,297KiB/s, mint=0msec, maxt=24206msec WRITE: io=267MiB, aggrb=13,138KiB/s, minb=0KiB/s, maxb=6,826KiB/s, mint=0msec, maxt=24206msec Disk stats (read/write): sda: ios=2460/2608, merge=838/65481, ticks=47352/2368320, in_queue=2422424, util=96.42% 2.40user 1.02system 0:24.66elapsed 13%CPU (0avgtext+0avgdata 0maxresident)k 0inputs+0outputs (0major+2488minor)pagefaults 0swaps