== sanity test 398b: DIO and buffer IO race ============== 08:16:00 (1764940560) /usr/bin/fio 12+0 records in 12+0 records out 12582912 bytes (13 MB, 12 MiB) copied, 0.128681 s, 97.8 MB/s mix direct rw 12M to OST0 by fio with 4 jobs... mix buffer rw 12M to OST0 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=148184: Fri Dec 5 08:16:10 2025 read: IOPS=107, BW=430KiB/s (440kB/s)(1480KiB/3444msec) clat (usec): min=6, max=38330, avg=4972.80, stdev=5839.38 lat (usec): min=6, max=38331, avg=4973.43, stdev=5839.56 clat percentiles (usec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 22], | 30.00th=[ 28], 40.00th=[ 53], 50.00th=[ 3589], 60.00th=[ 5800], | 70.00th=[ 6980], 80.00th=[ 9372], 90.00th=[12256], 95.00th=[15139], | 99.00th=[25822], 99.50th=[36439], 99.90th=[38536], 99.95th=[38536], | 99.99th=[38536] bw ( KiB/s): min= 295, max= 544, per=24.38%, avg=405.00, stdev=104.95, samples=6 iops : min= 73, max= 136, avg=101.00, stdev=26.29, samples=6 write: IOPS=115, BW=462KiB/s (473kB/s)(1592KiB/3444msec); 0 zone resets clat (usec): min=157, max=35681, avg=3940.48, stdev=4918.92 lat (usec): min=158, max=35682, avg=3941.18, stdev=4918.95 clat percentiles (usec): | 1.00th=[ 178], 5.00th=[ 215], 10.00th=[ 262], 20.00th=[ 347], | 30.00th=[ 482], 40.00th=[ 775], 50.00th=[ 2540], 60.00th=[ 3425], | 70.00th=[ 4555], 80.00th=[ 6783], 90.00th=[10683], 95.00th=[14484], | 99.00th=[19792], 99.50th=[34866], 99.90th=[35914], 99.95th=[35914], | 99.99th=[35914] bw ( KiB/s): min= 360, max= 528, per=25.19%, avg=440.33, stdev=68.10, samples=6 iops : min= 90, max= 132, avg=109.83, stdev=17.24, samples=6 lat (usec) : 10=1.04%, 20=7.42%, 50=10.42%, 100=1.30%, 250=4.82% lat (usec) : 500=11.85%, 750=4.17%, 1000=1.82% lat (msec) : 2=2.34%, 4=14.06%, 10=26.69%, 20=12.89%, 50=1.17% cpu : usr=0.20%, sys=9.61%, ctx=824, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=148185: Fri Dec 5 08:16:10 2025 read: IOPS=99, BW=398KiB/s (408kB/s)(1436KiB/3604msec) clat (usec): min=6, max=53365, avg=5668.80, stdev=6931.44 lat (usec): min=7, max=53365, avg=5669.33, stdev=6931.46 clat percentiles (usec): | 1.00th=[ 10], 5.00th=[ 14], 10.00th=[ 18], 20.00th=[ 24], | 30.00th=[ 30], 40.00th=[ 62], 50.00th=[ 4948], 60.00th=[ 6587], | 70.00th=[ 8291], 80.00th=[10159], 90.00th=[12387], 95.00th=[16581], | 99.00th=[31851], 99.50th=[49546], 99.90th=[53216], 99.95th=[53216], | 99.99th=[53216] bw ( KiB/s): min= 264, max= 520, per=23.80%, avg=395.29, stdev=82.02, samples=7 iops : min= 66, max= 130, avg=98.57, stdev=20.62, samples=7 write: IOPS=113, BW=454KiB/s (465kB/s)(1636KiB/3604msec); 0 zone resets clat (usec): min=155, max=24867, avg=3791.84, stdev=4270.84 lat (usec): min=155, max=24867, avg=3792.54, stdev=4270.86 clat percentiles (usec): | 1.00th=[ 180], 5.00th=[ 217], 10.00th=[ 245], 20.00th=[ 318], | 30.00th=[ 465], 40.00th=[ 807], 50.00th=[ 2835], 60.00th=[ 3490], | 70.00th=[ 4490], 80.00th=[ 6652], 90.00th=[ 9765], 95.00th=[12911], | 99.00th=[17433], 99.50th=[20841], 99.90th=[24773], 99.95th=[24773], | 99.99th=[24773] bw ( KiB/s): min= 376, max= 632, per=25.92%, avg=453.14, stdev=90.51, samples=7 iops : min= 94, max= 158, avg=113.00, stdev=22.77, samples=7 lat (usec) : 10=0.91%, 20=5.73%, 50=11.72%, 100=0.52%, 250=5.86% lat (usec) : 500=11.46%, 750=3.65%, 1000=1.82% lat (msec) : 2=1.56%, 4=13.41%, 10=28.91%, 20=12.50%, 50=1.82% lat (msec) : 100=0.13% cpu : usr=0.33%, sys=9.94%, ctx=893, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=148186: Fri Dec 5 08:16:10 2025 read: IOPS=111, BW=447KiB/s (458kB/s)(1564KiB/3499msec) clat (usec): min=5, max=59215, avg=4996.22, stdev=5978.76 lat (usec): min=5, max=59216, avg=4996.81, stdev=5978.81 clat percentiles (usec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 21], | 30.00th=[ 28], 40.00th=[ 45], 50.00th=[ 4424], 60.00th=[ 6259], | 70.00th=[ 7701], 80.00th=[ 9372], 90.00th=[11600], 95.00th=[13566], | 99.00th=[23200], 99.50th=[39584], 99.90th=[58983], 99.95th=[58983], | 99.99th=[58983] bw ( KiB/s): min= 272, max= 581, per=25.40%, avg=421.83, stdev=105.01, samples=6 iops : min= 68, max= 145, avg=105.17, stdev=26.07, samples=6 write: IOPS=107, BW=431KiB/s (441kB/s)(1508KiB/3499msec); 0 zone resets clat (usec): min=146, max=44445, avg=4000.42, stdev=5438.32 lat (usec): min=146, max=44445, avg=4001.62, stdev=5438.38 clat percentiles (usec): | 1.00th=[ 167], 5.00th=[ 210], 10.00th=[ 245], 20.00th=[ 314], | 30.00th=[ 412], 40.00th=[ 510], 50.00th=[ 1172], 60.00th=[ 3130], | 70.00th=[ 4490], 80.00th=[ 6980], 90.00th=[10814], 95.00th=[16188], | 99.00th=[21627], 99.50th=[25297], 99.90th=[44303], 99.95th=[44303], | 99.99th=[44303] bw ( KiB/s): min= 287, max= 663, per=23.77%, avg=415.50, stdev=129.95, samples=6 iops : min= 71, max= 165, avg=103.50, stdev=32.39, samples=6 lat (usec) : 10=0.52%, 20=8.46%, 50=11.85%, 100=0.78%, 250=5.34% lat (usec) : 500=13.93%, 750=3.65%, 1000=1.30% lat (msec) : 2=1.43%, 4=10.03%, 10=29.30%, 20=11.85%, 50=1.43% lat (msec) : 100=0.13% cpu : usr=0.26%, sys=9.81%, ctx=816, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=148187: Fri Dec 5 08:16:10 2025 read: IOPS=108, BW=436KiB/s (446kB/s)(1508KiB/3462msec) clat (usec): min=6, max=49871, avg=5438.46, stdev=6133.81 lat (usec): min=7, max=49871, avg=5438.96, stdev=6133.83 clat percentiles (usec): | 1.00th=[ 10], 5.00th=[ 15], 10.00th=[ 17], 20.00th=[ 22], | 30.00th=[ 29], 40.00th=[ 330], 50.00th=[ 4686], 60.00th=[ 6587], | 70.00th=[ 8356], 80.00th=[10028], 90.00th=[12125], 95.00th=[14222], | 99.00th=[26608], 99.50th=[32900], 99.90th=[50070], 99.95th=[50070], | 99.99th=[50070] bw ( KiB/s): min= 343, max= 520, per=24.94%, avg=414.33, stdev=68.24, samples=6 iops : min= 85, max= 130, avg=103.33, stdev=17.27, samples=6 write: IOPS=112, BW=452KiB/s (463kB/s)(1564KiB/3462msec); 0 zone resets clat (usec): min=145, max=27720, avg=3543.36, stdev=4959.86 lat (usec): min=145, max=27721, avg=3544.22, stdev=4960.15 clat percentiles (usec): | 1.00th=[ 180], 5.00th=[ 206], 10.00th=[ 233], 20.00th=[ 297], | 30.00th=[ 359], 40.00th=[ 490], 50.00th=[ 750], 60.00th=[ 2769], | 70.00th=[ 4015], 80.00th=[ 6783], 90.00th=[ 9765], 95.00th=[13960], | 99.00th=[23462], 99.50th=[27395], 99.90th=[27657], 99.95th=[27657], | 99.99th=[27657] bw ( KiB/s): min= 328, max= 560, per=24.63%, avg=430.50, stdev=91.66, samples=6 iops : min= 82, max= 140, avg=107.33, stdev=23.03, samples=6 lat (usec) : 10=0.91%, 20=7.03%, 50=10.94%, 100=0.26%, 250=6.64% lat (usec) : 500=14.84%, 750=4.56%, 1000=1.95% lat (msec) : 2=1.69%, 4=9.77%, 10=26.95%, 20=12.63%, 50=1.82% cpu : usr=0.26%, sys=9.22%, ctx=812, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=1661KiB/s (1701kB/s), 398KiB/s-447KiB/s (408kB/s-458kB/s), io=5988KiB (6132kB), run=3444-3604msec WRITE: bw=1748KiB/s (1790kB/s), 431KiB/s-462KiB/s (441kB/s-473kB/s), io=6300KiB (6451kB), run=3444-3604msec rand-rw: (groupid=0, jobs=1): err= 0: pid=148189: Fri Dec 5 08:16:14 2025 read: IOPS=48, BW=194KiB/s (198kB/s)(1480KiB/7646msec) clat (usec): min=1847, max=61703, avg=7303.26, stdev=5911.71 lat (usec): min=1848, max=61704, avg=7304.22, stdev=5911.69 clat percentiles (usec): | 1.00th=[ 1958], 5.00th=[ 2474], 10.00th=[ 2737], 20.00th=[ 3261], | 30.00th=[ 3752], 40.00th=[ 4228], 50.00th=[ 5211], 60.00th=[ 6587], | 70.00th=[ 7963], 80.00th=[10552], 90.00th=[14353], 95.00th=[19530], | 99.00th=[25560], 99.50th=[29754], 99.90th=[61604], 99.95th=[61604], | 99.99th=[61604] bw ( KiB/s): min= 127, max= 312, per=24.70%, avg=193.40, stdev=55.97, samples=15 iops : min= 31, max= 78, avg=47.80, stdev=14.07, samples=15 write: IOPS=52, BW=208KiB/s (213kB/s)(1592KiB/7646msec); 0 zone resets clat (usec): min=3965, max=36367, avg=12366.05, stdev=5053.14 lat (usec): min=3966, max=36369, avg=12367.67, stdev=5053.13 clat percentiles (usec): | 1.00th=[ 4621], 5.00th=[ 5800], 10.00th=[ 7046], 20.00th=[ 8356], | 30.00th=[ 9241], 40.00th=[10028], 50.00th=[11207], 60.00th=[12387], | 70.00th=[14222], 80.00th=[16450], 90.00th=[19268], 95.00th=[21627], | 99.00th=[29754], 99.50th=[31589], 99.90th=[36439], 99.95th=[36439], | 99.99th=[36439] bw ( KiB/s): min= 127, max= 311, per=25.28%, avg=208.07, stdev=57.15, samples=15 iops : min= 31, max= 77, avg=51.47, stdev=14.25, samples=15 lat (msec) : 2=0.52%, 4=16.15%, 10=41.02%, 20=35.81%, 50=6.38% lat (msec) : 100=0.13% cpu : usr=0.25%, sys=3.02%, ctx=910, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=148190: Fri Dec 5 08:16:14 2025 read: IOPS=47, BW=190KiB/s (194kB/s)(1436KiB/7573msec) clat (usec): min=1777, max=61130, avg=7136.72, stdev=6154.95 lat (usec): min=1778, max=61131, avg=7137.75, stdev=6154.92 clat percentiles (usec): | 1.00th=[ 1958], 5.00th=[ 2540], 10.00th=[ 2769], 20.00th=[ 3195], | 30.00th=[ 3589], 40.00th=[ 4047], 50.00th=[ 4817], 60.00th=[ 5932], | 70.00th=[ 7570], 80.00th=[ 9896], 90.00th=[16188], 95.00th=[19006], | 99.00th=[28443], 99.50th=[34866], 99.90th=[61080], 99.95th=[61080], | 99.99th=[61080] bw ( KiB/s): min= 105, max= 303, per=24.16%, avg=189.14, stdev=66.31, samples=14 iops : min= 26, max= 75, avg=46.79, stdev=16.58, samples=14 write: IOPS=54, BW=216KiB/s (221kB/s)(1636KiB/7573msec); 0 zone resets clat (usec): min=4450, max=39106, avg=12199.54, stdev=5030.84 lat (usec): min=4451, max=39107, avg=12200.92, stdev=5030.90 clat percentiles (usec): | 1.00th=[ 4883], 5.00th=[ 6390], 10.00th=[ 7242], 20.00th=[ 8160], | 30.00th=[ 9110], 40.00th=[10028], 50.00th=[11076], 60.00th=[12387], | 70.00th=[13566], 80.00th=[15533], 90.00th=[18744], 95.00th=[21365], | 99.00th=[29492], 99.50th=[32375], 99.90th=[39060], 99.95th=[39060], | 99.99th=[39060] bw ( KiB/s): min= 111, max= 335, per=25.78%, avg=212.14, stdev=54.11, samples=14 iops : min= 27, max= 83, avg=52.50, stdev=13.56, samples=14 lat (msec) : 2=0.78%, 4=17.32%, 10=40.49%, 20=36.20%, 50=5.08% lat (msec) : 100=0.13% cpu : usr=0.15%, sys=3.04%, ctx=891, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=148191: Fri Dec 5 08:16:14 2025 read: IOPS=52, BW=209KiB/s (214kB/s)(1564KiB/7492msec) clat (usec): min=1871, max=34805, avg=6994.03, stdev=4839.63 lat (usec): min=1872, max=34807, avg=6995.85, stdev=4839.64 clat percentiles (usec): | 1.00th=[ 2040], 5.00th=[ 2540], 10.00th=[ 2802], 20.00th=[ 3294], | 30.00th=[ 3818], 40.00th=[ 4359], 50.00th=[ 5211], 60.00th=[ 6390], | 70.00th=[ 8586], 80.00th=[10421], 90.00th=[13829], 95.00th=[16319], | 99.00th=[24249], 99.50th=[29492], 99.90th=[34866], 99.95th=[34866], | 99.99th=[34866] bw ( KiB/s): min= 132, max= 343, per=27.25%, avg=213.36, stdev=66.74, samples=14 iops : min= 33, max= 85, avg=52.86, stdev=16.70, samples=14 write: IOPS=50, BW=201KiB/s (206kB/s)(1508KiB/7492msec); 0 zone resets clat (usec): min=4363, max=61214, avg=12576.01, stdev=5752.78 lat (usec): min=4365, max=61216, avg=12577.49, stdev=5752.89 clat percentiles (usec): | 1.00th=[ 5080], 5.00th=[ 6325], 10.00th=[ 7242], 20.00th=[ 8356], | 30.00th=[ 9503], 40.00th=[10290], 50.00th=[11207], 60.00th=[12387], | 70.00th=[13829], 80.00th=[15795], 90.00th=[19530], 95.00th=[23200], | 99.00th=[33817], 99.50th=[39584], 99.90th=[61080], 99.95th=[61080], | 99.99th=[61080] bw ( KiB/s): min= 143, max= 287, per=24.13%, avg=198.57, stdev=48.48, samples=14 iops : min= 35, max= 71, avg=49.14, stdev=12.04, samples=14 lat (msec) : 2=0.39%, 4=17.58%, 10=39.84%, 20=36.59%, 50=5.47% lat (msec) : 100=0.13% cpu : usr=0.31%, sys=2.98%, ctx=912, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=148192: Fri Dec 5 08:16:14 2025 read: IOPS=49, BW=199KiB/s (204kB/s)(1508KiB/7577msec) clat (usec): min=1547, max=40193, avg=6995.82, stdev=5475.85 lat (usec): min=1547, max=40193, avg=6996.82, stdev=5475.79 clat percentiles (usec): | 1.00th=[ 2057], 5.00th=[ 2606], 10.00th=[ 2769], 20.00th=[ 3064], | 30.00th=[ 3556], 40.00th=[ 4080], 50.00th=[ 4752], 60.00th=[ 5604], | 70.00th=[ 7767], 80.00th=[10290], 90.00th=[14746], 95.00th=[18482], | 99.00th=[24249], 99.50th=[39060], 99.90th=[40109], 99.95th=[40109], | 99.99th=[40109] bw ( KiB/s): min= 103, max= 335, per=24.91%, avg=195.07, stdev=58.82, samples=14 iops : min= 25, max= 83, avg=48.29, stdev=14.57, samples=14 write: IOPS=51, BW=206KiB/s (211kB/s)(1564KiB/7577msec); 0 zone resets clat (usec): min=4246, max=38861, avg=12578.15, stdev=5268.02 lat (usec): min=4248, max=38862, avg=12579.84, stdev=5268.25 clat percentiles (usec): | 1.00th=[ 5080], 5.00th=[ 6587], 10.00th=[ 7504], 20.00th=[ 8586], | 30.00th=[ 9372], 40.00th=[10159], 50.00th=[11338], 60.00th=[12387], | 70.00th=[14091], 80.00th=[16319], 90.00th=[19006], 95.00th=[22938], | 99.00th=[32637], 99.50th=[36439], 99.90th=[39060], 99.95th=[39060], | 99.99th=[39060] bw ( KiB/s): min= 103, max= 288, per=24.94%, avg=205.29, stdev=52.61, samples=14 iops : min= 25, max= 72, avg=50.79, stdev=13.22, samples=14 lat (msec) : 2=0.39%, 4=18.49%, 10=38.28%, 20=37.24%, 50=5.60% cpu : usr=0.25%, sys=3.01%, ctx=888, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=783KiB/s (802kB/s), 190KiB/s-209KiB/s (194kB/s-214kB/s), io=5988KiB (6132kB), run=7492-7646msec WRITE: bw=824KiB/s (844kB/s), 201KiB/s-216KiB/s (206kB/s-221kB/s), io=6300KiB (6451kB), run=7492-7646msec