== sanity test 398b: DIO and buffer IO race ============== 13:50:32 (1787853032) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 8.51514 s, 5.9 MB/s mix direct rw 4096 by fio with 4 jobs... mix buffer rw 4096 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=144304: Thu Aug 27 13:53:10 2026 read: IOPS=11, BW=44.4KiB/s (45.4kB/s)(5992KiB/135095msec) clat (usec): min=31, max=1137.8k, avg=44472.71, stdev=44458.63 lat (usec): min=32, max=1137.8k, avg=44474.55, stdev=44458.52 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 61], 10.00th=[ 10552], | 20.00th=[ 20317], 30.00th=[ 25297], 40.00th=[ 31589], | 50.00th=[ 39060], 60.00th=[ 45876], 70.00th=[ 53216], | 80.00th=[ 64226], 90.00th=[ 81265], 95.00th=[ 99091], | 99.00th=[ 145753], 99.50th=[ 173016], 99.90th=[ 616563], | 99.95th=[1132463], 99.99th=[1132463] bw ( KiB/s): min= 7, max= 95, per=25.29%, avg=44.51, stdev=19.41, samples=262 iops : min= 1, max= 23, avg=10.50, stdev= 4.89, samples=262 write: IOPS=11, BW=46.6KiB/s (47.7kB/s)(6296KiB/135095msec); 0 zone resets clat (usec): min=856, max=364791, avg=43179.61, stdev=45428.04 lat (usec): min=857, max=364793, avg=43182.70, stdev=45427.42 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1205], 10.00th=[ 1483], 20.00th=[ 3916], | 30.00th=[ 9241], 40.00th=[ 20055], 50.00th=[ 33162], 60.00th=[ 42730], | 70.00th=[ 56361], 80.00th=[ 71828], 90.00th=[102237], 95.00th=[130548], | 99.00th=[198181], 99.50th=[225444], 99.90th=[350225], 99.95th=[362808], | 99.99th=[362808] bw ( KiB/s): min= 7, max= 119, per=25.09%, avg=46.42, stdev=20.10, samples=264 iops : min= 1, max= 29, avg=10.99, stdev= 5.07, samples=264 lat (usec) : 50=0.36%, 100=3.74%, 250=0.33%, 500=0.13%, 750=0.03% lat (usec) : 1000=0.13% lat (msec) : 2=6.41%, 4=3.87%, 10=5.86%, 20=9.15%, 50=35.45% lat (msec) : 100=26.69%, 250=7.58%, 500=0.20%, 750=0.03%, 2000=0.03% cpu : usr=0.05%, sys=4.27%, ctx=6137, majf=0, minf=14 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=1498,1574,0,0 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=144307: Thu Aug 27 13:53:10 2026 read: IOPS=11, BW=44.3KiB/s (45.3kB/s)(5940KiB/134175msec) clat (usec): min=29, max=1065.3k, avg=45256.45, stdev=43243.90 lat (usec): min=29, max=1065.3k, avg=45260.01, stdev=43244.07 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 62], 10.00th=[ 9765], | 20.00th=[ 21365], 30.00th=[ 26346], 40.00th=[ 31589], | 50.00th=[ 36963], 60.00th=[ 44827], 70.00th=[ 54789], | 80.00th=[ 66323], 90.00th=[ 83362], 95.00th=[ 102237], | 99.00th=[ 173016], 99.50th=[ 193987], 99.90th=[ 383779], | 99.95th=[1061159], 99.99th=[1061159] bw ( KiB/s): min= 7, max= 103, per=25.49%, avg=44.86, stdev=18.17, samples=258 iops : min= 1, max= 25, avg=10.59, stdev= 4.58, samples=258 write: IOPS=11, BW=47.3KiB/s (48.4kB/s)(6348KiB/134175msec); 0 zone resets clat (usec): min=857, max=431921, avg=41856.09, stdev=44716.94 lat (usec): min=857, max=431921, avg=41861.76, stdev=44716.21 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1205], 10.00th=[ 1467], 20.00th=[ 4080], | 30.00th=[ 8586], 40.00th=[ 19530], 50.00th=[ 30278], 60.00th=[ 41681], | 70.00th=[ 53740], 80.00th=[ 72877], 90.00th=[ 96994], 95.00th=[124257], | 99.00th=[200279], 99.50th=[233833], 99.90th=[346031], 99.95th=[429917], | 99.99th=[429917] bw ( KiB/s): min= 7, max= 102, per=25.48%, avg=47.14, stdev=21.01, samples=262 iops : min= 1, max= 25, avg=11.16, stdev= 5.28, samples=262 lat (usec) : 50=0.65%, 100=3.42%, 250=0.16%, 500=0.13%, 750=0.07% lat (usec) : 1000=0.07% lat (msec) : 2=6.45%, 4=3.74%, 10=6.61%, 20=8.53%, 50=36.26% lat (msec) : 100=26.37%, 250=7.26%, 500=0.26%, 2000=0.03% cpu : usr=0.07%, sys=4.25%, ctx=6155, 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=1485,1587,0,0 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=144308: Thu Aug 27 13:53:10 2026 read: IOPS=11, BW=44.4KiB/s (45.5kB/s)(6028KiB/135679msec) clat (usec): min=28, max=343910, avg=43459.51, stdev=33597.77 lat (usec): min=28, max=343912, avg=43462.01, stdev=33604.56 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 62], 10.00th=[ 2540], 20.00th=[ 20055], | 30.00th=[ 26084], 40.00th=[ 31327], 50.00th=[ 36963], 60.00th=[ 43779], | 70.00th=[ 51643], 80.00th=[ 63701], 90.00th=[ 83362], 95.00th=[100140], | 99.00th=[162530], 99.50th=[210764], 99.90th=[261096], 99.95th=[341836], | 99.99th=[341836] bw ( KiB/s): min= 7, max= 111, per=25.24%, avg=44.43, stdev=19.83, samples=263 iops : min= 1, max= 27, avg=10.48, stdev= 4.98, samples=263 write: IOPS=11, BW=46.1KiB/s (47.2kB/s)(6260KiB/135679msec); 0 zone resets clat (usec): min=668, max=1141.5k, avg=44530.77, stdev=55745.23 lat (usec): min=668, max=1141.5k, avg=44536.33, stdev=55743.20 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1205], 10.00th=[ 1434], | 20.00th=[ 4293], 30.00th=[ 9241], 40.00th=[ 21103], | 50.00th=[ 31851], 60.00th=[ 42730], 70.00th=[ 57934], | 80.00th=[ 74974], 90.00th=[ 101188], 95.00th=[ 126354], | 99.00th=[ 193987], 99.50th=[ 235930], 99.90th=[ 725615], | 99.95th=[1149240], 99.99th=[1149240] bw ( KiB/s): min= 7, max= 118, per=24.83%, avg=45.93, stdev=21.21, samples=264 iops : min= 1, max= 29, avg=10.86, stdev= 5.36, samples=264 lat (usec) : 50=0.59%, 100=3.74%, 250=0.20%, 500=0.07%, 750=0.16% lat (usec) : 1000=0.20% lat (msec) : 2=6.87%, 4=2.93%, 10=6.54%, 20=8.33%, 50=36.98% lat (msec) : 100=25.55%, 250=7.49%, 500=0.29%, 750=0.03%, 2000=0.03% cpu : usr=0.06%, sys=4.17%, ctx=6220, majf=0, minf=14 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=1507,1565,0,0 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=144309: Thu Aug 27 13:53:10 2026 read: IOPS=11, BW=44.6KiB/s (45.6kB/s)(6052KiB/135762msec) clat (usec): min=20, max=303676, avg=43388.54, stdev=31187.17 lat (usec): min=20, max=303676, avg=43395.71, stdev=31187.66 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 62], 10.00th=[ 10945], 20.00th=[ 20579], | 30.00th=[ 26346], 40.00th=[ 31065], 50.00th=[ 36963], 60.00th=[ 44303], | 70.00th=[ 53740], 80.00th=[ 64750], 90.00th=[ 82314], 95.00th=[100140], | 99.00th=[141558], 99.50th=[168821], 99.90th=[265290], 99.95th=[304088], | 99.99th=[304088] bw ( KiB/s): min= 7, max= 88, per=25.23%, avg=44.41, stdev=18.58, samples=263 iops : min= 1, max= 22, avg=10.48, stdev= 4.69, samples=263 write: IOPS=11, BW=45.9KiB/s (47.0kB/s)(6236KiB/135762msec); 0 zone resets clat (usec): min=953, max=1067.8k, avg=44623.29, stdev=51791.41 lat (usec): min=955, max=1067.8k, avg=44625.25, stdev=51791.24 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1221], 10.00th=[ 1500], | 20.00th=[ 4047], 30.00th=[ 9110], 40.00th=[ 21890], | 50.00th=[ 32900], 60.00th=[ 44827], 70.00th=[ 58459], | 80.00th=[ 74974], 90.00th=[ 102237], 95.00th=[ 132645], | 99.00th=[ 193987], 99.50th=[ 252707], 99.90th=[ 295699], | 99.95th=[1069548], 99.99th=[1069548] bw ( KiB/s): min= 7, max= 135, per=24.52%, avg=45.35, stdev=20.59, samples=266 iops : min= 1, max= 33, avg=10.71, stdev= 5.20, samples=266 lat (usec) : 50=0.75%, 100=3.32%, 250=0.20%, 500=0.07%, 750=0.03% lat (usec) : 1000=0.13% lat (msec) : 2=6.71%, 4=3.35%, 10=5.83%, 20=8.59%, 50=36.23% lat (msec) : 100=26.89%, 250=7.55%, 500=0.33%, 2000=0.03% cpu : usr=0.08%, sys=4.37%, ctx=6321, 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=1513,1559,0,0 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=177KiB/s (181kB/s), 44.3KiB/s-44.6KiB/s (45.3kB/s-45.6kB/s), io=23.4MiB (24.6MB), run=134175-135762msec WRITE: bw=185KiB/s (190kB/s), 45.9KiB/s-47.3KiB/s (47.0kB/s-48.4kB/s), io=24.6MiB (25.7MB), run=134175-135762msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144302: Thu Aug 27 13:55:30 2026 read: IOPS=5, BW=21.7KiB/s (22.3kB/s)(5992KiB/275537msec) clat (msec): min=5, max=1181, avg=37.26, stdev=47.91 lat (msec): min=5, max=1181, avg=37.26, stdev=47.91 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 35], 80.00th=[ 50], 90.00th=[ 83], 95.00th=[ 117], | 99.00th=[ 188], 99.50th=[ 215], 99.90th=[ 376], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 7, max= 102, per=28.46%, avg=24.76, stdev=17.07, samples=467 iops : min= 1, max= 25, avg= 5.55, stdev= 4.31, samples=467 write: IOPS=5, BW=22.8KiB/s (23.4kB/s)(6296KiB/275537msec); 0 zone resets clat (msec): min=37, max=778, avg=139.27, stdev=67.32 lat (msec): min=37, max=778, avg=139.28, stdev=67.32 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 66], 10.00th=[ 74], 20.00th=[ 88], | 30.00th=[ 99], 40.00th=[ 111], 50.00th=[ 125], 60.00th=[ 140], | 70.00th=[ 159], 80.00th=[ 182], 90.00th=[ 222], 95.00th=[ 268], | 99.00th=[ 363], 99.50th=[ 409], 99.90th=[ 642], 99.95th=[ 776], | 99.99th=[ 776] bw ( KiB/s): min= 7, max= 55, per=24.92%, avg=22.68, stdev=10.16, samples=533 iops : min= 1, max= 13, avg= 5.02, stdev= 2.59, samples=533 lat (msec) : 10=3.68%, 20=16.96%, 50=18.91%, 100=21.94%, 250=35.16% lat (msec) : 500=3.19%, 750=0.10%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.03%, ctx=5089, majf=0, minf=14 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=1498,1574,0,0 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=144303: Thu Aug 27 13:55:30 2026 read: IOPS=5, BW=21.7KiB/s (22.2kB/s)(5940KiB/273681msec) clat (msec): min=5, max=1056, avg=36.82, stdev=48.08 lat (msec): min=5, max=1056, avg=36.82, stdev=48.08 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 34], 80.00th=[ 46], 90.00th=[ 79], 95.00th=[ 113], | 99.00th=[ 211], 99.50th=[ 251], 99.90th=[ 498], 99.95th=[ 1053], | 99.99th=[ 1053] bw ( KiB/s): min= 7, max= 88, per=28.58%, avg=24.86, stdev=17.10, samples=460 iops : min= 1, max= 22, avg= 5.56, stdev= 4.33, samples=460 write: IOPS=5, BW=23.2KiB/s (23.8kB/s)(6348KiB/273681msec); 0 zone resets clat (msec): min=33, max=653, avg=137.69, stdev=63.03 lat (msec): min=33, max=653, avg=137.69, stdev=63.03 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 64], 10.00th=[ 73], 20.00th=[ 88], | 30.00th=[ 100], 40.00th=[ 111], 50.00th=[ 124], 60.00th=[ 136], | 70.00th=[ 157], 80.00th=[ 182], 90.00th=[ 222], 95.00th=[ 264], | 99.00th=[ 334], 99.50th=[ 393], 99.90th=[ 485], 99.95th=[ 651], | 99.99th=[ 651] bw ( KiB/s): min= 7, max= 48, per=25.20%, avg=22.94, stdev=10.07, samples=532 iops : min= 1, max= 12, avg= 5.08, stdev= 2.57, samples=532 lat (msec) : 10=3.58%, 20=17.38%, 50=18.52%, 100=21.84%, 250=35.16% lat (msec) : 500=3.45%, 750=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.07%, ctx=5050, 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=1485,1587,0,0 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=144305: Thu Aug 27 13:55:30 2026 read: IOPS=5, BW=21.9KiB/s (22.5kB/s)(6028KiB/274867msec) clat (msec): min=5, max=488, avg=37.23, stdev=38.48 lat (msec): min=5, max=488, avg=37.23, stdev=38.48 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 37], 80.00th=[ 52], 90.00th=[ 81], 95.00th=[ 112], | 99.00th=[ 178], 99.50th=[ 241], 99.90th=[ 376], 99.95th=[ 489], | 99.99th=[ 489] bw ( KiB/s): min= 7, max= 95, per=27.48%, avg=23.91, stdev=16.67, samples=486 iops : min= 1, max= 23, avg= 5.33, stdev= 4.19, samples=486 write: IOPS=5, BW=22.8KiB/s (23.3kB/s)(6260KiB/274867msec); 0 zone resets clat (msec): min=27, max=1161, avg=139.48, stdev=73.23 lat (msec): min=27, max=1161, avg=139.48, stdev=73.23 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 66], 10.00th=[ 75], 20.00th=[ 87], | 30.00th=[ 99], 40.00th=[ 109], 50.00th=[ 121], 60.00th=[ 136], | 70.00th=[ 159], 80.00th=[ 184], 90.00th=[ 226], 95.00th=[ 264], | 99.00th=[ 376], 99.50th=[ 414], 99.90th=[ 852], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 7, max= 48, per=25.02%, avg=22.76, stdev=10.11, samples=529 iops : min= 1, max= 12, avg= 5.04, stdev= 2.58, samples=529 lat (msec) : 10=2.73%, 20=16.86%, 50=19.82%, 100=22.62%, 250=34.41% lat (msec) : 500=3.35%, 750=0.13%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.04%, ctx=5067, 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=1507,1565,0,0 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=144306: Thu Aug 27 13:55:30 2026 read: IOPS=5, BW=21.0KiB/s (22.5kB/s)(6052KiB/275616msec) clat (msec): min=4, max=490, avg=36.40, stdev=39.41 lat (msec): min=4, max=490, avg=36.40, stdev=39.41 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 35], 80.00th=[ 50], 90.00th=[ 79], 95.00th=[ 118], | 99.00th=[ 197], 99.50th=[ 249], 99.90th=[ 355], 99.95th=[ 489], | 99.99th=[ 489] bw ( KiB/s): min= 7, max= 95, per=28.91%, avg=25.16, stdev=16.94, samples=464 iops : min= 1, max= 23, avg= 5.64, stdev= 4.27, samples=464 write: IOPS=5, BW=22.6KiB/s (23.2kB/s)(6236KiB/275616msec); 0 zone resets clat (msec): min=39, max=1256, avg=141.13, stdev=74.31 lat (msec): min=39, max=1256, avg=141.13, stdev=74.31 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 65], 10.00th=[ 74], 20.00th=[ 89], | 30.00th=[ 101], 40.00th=[ 113], 50.00th=[ 124], 60.00th=[ 140], | 70.00th=[ 155], 80.00th=[ 184], 90.00th=[ 230], 95.00th=[ 271], | 99.00th=[ 388], 99.50th=[ 422], 99.90th=[ 802], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 7, max= 48, per=24.42%, avg=22.22, stdev=10.27, samples=538 iops : min= 1, max= 12, avg= 4.90, stdev= 2.62, samples=538 lat (msec) : 10=3.26%, 20=17.35%, 50=19.40%, 100=21.45%, 250=34.80% lat (msec) : 500=3.58%, 750=0.10%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.05%, ctx=4911, majf=0, minf=14 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=1513,1559,0,0 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=87.1KiB/s (89.2kB/s), 21.7KiB/s-21.0KiB/s (22.2kB/s-22.5kB/s), io=23.4MiB (24.6MB), run=273681-275616msec WRITE: bw=91.2KiB/s (93.4kB/s), 22.6KiB/s-23.2KiB/s (23.2kB/s-23.8kB/s), io=24.6MiB (25.7MB), run=273681-275616msec mix direct rw 16384 by fio with 4 jobs... mix buffer rw 16384 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 16.0KiB-16.0KiB, (W) 16.0KiB-16.0KiB, (T) 16.0KiB-16.0KiB, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 16.0KiB-16.0KiB, (W) 16.0KiB-16.0KiB, (T) 16.0KiB-16.0KiB, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=144367: Thu Aug 27 13:56:11 2026 read: IOPS=12, BW=207KiB/s (212kB/s)(5920KiB/28556msec) clat (usec): min=29, max=270304, avg=40725.99, stdev=38451.40 lat (usec): min=29, max=270305, avg=40727.13, stdev=38451.45 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 50], 10.00th=[ 59], 20.00th=[ 71], | 30.00th=[ 19792], 40.00th=[ 27919], 50.00th=[ 37487], 60.00th=[ 45351], | 70.00th=[ 52167], 80.00th=[ 64226], 90.00th=[ 87557], 95.00th=[104334], | 99.00th=[185598], 99.50th=[233833], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 31, max= 384, per=24.86%, avg=206.55, stdev=80.00, samples=56 iops : min= 1, max= 24, avg=12.18, stdev= 5.06, samples=56 write: IOPS=13, BW=223KiB/s (228kB/s)(6368KiB/28556msec); 0 zone resets clat (usec): min=1362, max=253642, avg=33076.86, stdev=34427.41 lat (usec): min=1363, max=253644, avg=33085.20, stdev=34425.85 clat percentiles (usec): | 1.00th=[ 1532], 5.00th=[ 1745], 10.00th=[ 2212], 20.00th=[ 5211], | 30.00th=[ 8455], 40.00th=[ 12256], 50.00th=[ 20579], 60.00th=[ 29754], | 70.00th=[ 44827], 80.00th=[ 60031], 90.00th=[ 79168], 95.00th=[104334], | 99.00th=[139461], 99.50th=[175113], 99.90th=[252707], 99.95th=[252707], | 99.99th=[252707] bw ( KiB/s): min= 30, max= 472, per=25.96%, avg=226.85, stdev=88.18, samples=55 iops : min= 1, max= 29, avg=13.47, stdev= 5.57, samples=55 lat (usec) : 50=2.60%, 100=9.51%, 250=0.26%, 500=0.13%, 750=0.13% lat (msec) : 2=4.56%, 4=3.91%, 10=9.38%, 20=9.51%, 50=31.25% lat (msec) : 100=23.44%, 250=5.08%, 500=0.26% cpu : usr=0.06%, sys=5.04%, ctx=1444, 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=144369: Thu Aug 27 13:56:11 2026 read: IOPS=12, BW=206KiB/s (211kB/s)(5744KiB/27860msec) clat (usec): min=36, max=200332, avg=38635.42, stdev=33469.97 lat (usec): min=36, max=200333, avg=38636.60, stdev=33470.06 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 57], 10.00th=[ 62], 20.00th=[ 80], | 30.00th=[ 20317], 40.00th=[ 30540], 50.00th=[ 35390], 60.00th=[ 41681], | 70.00th=[ 51643], 80.00th=[ 64226], 90.00th=[ 82314], 95.00th=[ 98042], | 99.00th=[156238], 99.50th=[179307], 99.90th=[200279], 99.95th=[200279], | 99.99th=[200279] bw ( KiB/s): min= 30, max= 445, per=25.26%, avg=209.87, stdev=85.13, samples=54 iops : min= 1, max= 27, avg=12.37, stdev= 5.37, samples=54 write: IOPS=14, BW=235KiB/s (241kB/s)(6544KiB/27860msec); 0 zone resets clat (usec): min=1407, max=323343, avg=33412.43, stdev=40697.24 lat (usec): min=1408, max=323346, avg=33414.57, stdev=40697.20 clat percentiles (usec): | 1.00th=[ 1516], 5.00th=[ 1729], 10.00th=[ 2180], 20.00th=[ 5014], | 30.00th=[ 7242], 40.00th=[ 11076], 50.00th=[ 17171], 60.00th=[ 28705], | 70.00th=[ 38536], 80.00th=[ 59507], 90.00th=[ 83362], 95.00th=[105382], | 99.00th=[198181], 99.50th=[217056], 99.90th=[325059], 99.95th=[325059], | 99.99th=[325059] bw ( KiB/s): min= 30, max= 448, per=26.84%, avg=234.56, stdev=95.48, samples=55 iops : min= 1, max= 28, avg=13.93, stdev= 6.03, samples=55 lat (usec) : 50=1.56%, 100=8.98%, 250=0.91%, 500=0.13% lat (msec) : 2=5.21%, 4=4.30%, 10=11.07%, 20=9.77%, 50=30.21% lat (msec) : 100=22.01%, 250=5.60%, 500=0.26% cpu : usr=0.07%, sys=5.07%, ctx=1381, 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=144370: Thu Aug 27 13:56:11 2026 read: IOPS=13, BW=217KiB/s (222kB/s)(6256KiB/28807msec) clat (usec): min=34, max=398729, avg=39784.42, stdev=42969.96 lat (usec): min=34, max=398730, avg=39804.14, stdev=42954.59 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 50], 10.00th=[ 60], 20.00th=[ 73], | 30.00th=[ 18220], 40.00th=[ 27919], 50.00th=[ 34341], 60.00th=[ 41681], | 70.00th=[ 51643], 80.00th=[ 63701], 90.00th=[ 79168], 95.00th=[100140], | 99.00th=[240124], 99.50th=[248513], 99.90th=[400557], 99.95th=[400557], | 99.99th=[400557] bw ( KiB/s): min= 62, max= 478, per=25.86%, avg=214.91, stdev=93.30, samples=56 iops : min= 3, max= 29, avg=12.71, stdev= 5.87, samples=56 write: IOPS=13, BW=209KiB/s (214kB/s)(6032KiB/28807msec); 0 zone resets clat (usec): min=1360, max=264417, avg=34889.33, stdev=37306.24 lat (usec): min=1360, max=264419, avg=34914.67, stdev=37288.12 clat percentiles (usec): | 1.00th=[ 1467], 5.00th=[ 1745], 10.00th=[ 2343], 20.00th=[ 4686], | 30.00th=[ 8225], 40.00th=[ 13698], 50.00th=[ 21627], 60.00th=[ 32637], | 70.00th=[ 47973], 80.00th=[ 61604], 90.00th=[ 83362], 95.00th=[ 99091], | 99.00th=[191890], 99.50th=[229639], 99.90th=[265290], 99.95th=[265290], | 99.99th=[265290] bw ( KiB/s): min= 62, max= 479, per=23.36%, avg=204.18, stdev=85.56, samples=56 iops : min= 3, max= 29, avg=12.04, stdev= 5.44, samples=56 lat (usec) : 50=2.60%, 100=11.07%, 250=0.52%, 1000=0.13% lat (msec) : 2=4.17%, 4=4.69%, 10=8.07%, 20=7.55%, 50=31.12% lat (msec) : 100=25.13%, 250=4.69%, 500=0.26% cpu : usr=0.06%, sys=4.63%, ctx=1321, 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=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=144372: Thu Aug 27 13:56:11 2026 read: IOPS=13, BW=221KiB/s (226kB/s)(6032KiB/27292msec) clat (usec): min=34, max=278017, avg=38253.32, stdev=36091.54 lat (usec): min=35, max=278018, avg=38254.48, stdev=36091.53 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 49], 10.00th=[ 61], 20.00th=[ 75], | 30.00th=[ 16712], 40.00th=[ 28443], 50.00th=[ 34866], 60.00th=[ 44303], | 70.00th=[ 53740], 80.00th=[ 63701], 90.00th=[ 80217], 95.00th=[ 94897], | 99.00th=[147850], 99.50th=[235930], 99.90th=[278922], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 21, max= 480, per=26.60%, avg=221.06, stdev=90.86, samples=53 iops : min= 1, max= 30, avg=13.08, stdev= 5.76, samples=53 write: IOPS=14, BW=229KiB/s (235kB/s)(6256KiB/27292msec); 0 zone resets clat (usec): min=1412, max=283797, avg=31933.37, stdev=36961.55 lat (usec): min=1413, max=283798, avg=31965.33, stdev=36952.54 clat percentiles (usec): | 1.00th=[ 1483], 5.00th=[ 1762], 10.00th=[ 2089], 20.00th=[ 4228], | 30.00th=[ 6456], 40.00th=[ 9765], 50.00th=[ 16909], 60.00th=[ 27395], | 70.00th=[ 41157], 80.00th=[ 57934], 90.00th=[ 80217], 95.00th=[102237], | 99.00th=[160433], 99.50th=[204473], 99.90th=[283116], 99.95th=[283116], | 99.99th=[283116] bw ( KiB/s): min= 31, max= 473, per=26.30%, avg=229.87, stdev=97.77, samples=53 iops : min= 1, max= 29, avg=13.64, stdev= 6.17, samples=53 lat (usec) : 50=2.47%, 100=10.16%, 250=0.65%, 500=0.13%, 750=0.39% lat (msec) : 2=4.56%, 4=5.34%, 10=10.94%, 20=7.55%, 50=28.91% lat (msec) : 100=24.35%, 250=4.30%, 500=0.26% cpu : usr=0.05%, sys=5.09%, ctx=1325, 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=831KiB/s (851kB/s), 206KiB/s-221KiB/s (211kB/s-226kB/s), io=23.4MiB (24.5MB), run=27292-28807msec WRITE: bw=875KiB/s (896kB/s), 209KiB/s-235KiB/s (214kB/s-241kB/s), io=24.6MiB (25.8MB), run=27292-28807msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144368: Thu Aug 27 13:56:57 2026 read: IOPS=5, BW=80.9KiB/s (82.9kB/s)(5920KiB/73155msec) clat (msec): min=8, max=365, avg=38.96, stdev=35.73 lat (msec): min=8, max=365, avg=38.96, stdev=35.73 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 25], 50.00th=[ 28], 60.00th=[ 34], | 70.00th=[ 40], 80.00th=[ 51], 90.00th=[ 77], 95.00th=[ 91], | 99.00th=[ 209], 99.50th=[ 249], 99.90th=[ 368], 99.95th=[ 368], | 99.99th=[ 368] bw ( KiB/s): min= 30, max= 254, per=27.63%, avg=88.96, stdev=52.62, samples=130 iops : min= 1, max= 15, avg= 4.76, stdev= 3.31, samples=130 write: IOPS=5, BW=87.0KiB/s (89.1kB/s)(6368KiB/73155msec); 0 zone resets clat (msec): min=46, max=420, avg=146.49, stdev=59.20 lat (msec): min=46, max=420, avg=146.51, stdev=59.18 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 69], 10.00th=[ 83], 20.00th=[ 99], | 30.00th=[ 109], 40.00th=[ 122], 50.00th=[ 136], 60.00th=[ 148], | 70.00th=[ 171], 80.00th=[ 201], 90.00th=[ 226], 95.00th=[ 249], | 99.00th=[ 359], 99.50th=[ 414], 99.90th=[ 422], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 30, max= 191, per=25.81%, avg=87.24, stdev=36.30, samples=143 iops : min= 1, max= 11, avg= 4.64, stdev= 2.32, samples=143 lat (msec) : 10=1.04%, 20=10.94%, 50=26.69%, 100=19.27%, 250=39.45% lat (msec) : 500=2.60% cpu : usr=0.05%, sys=1.22%, ctx=1266, 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=144371: Thu Aug 27 13:56:57 2026 read: IOPS=4, BW=77.3KiB/s (79.1kB/s)(5744KiB/74337msec) clat (msec): min=6, max=289, avg=40.51, stdev=40.78 lat (msec): min=6, max=289, avg=40.51, stdev=40.78 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 32], | 70.00th=[ 39], 80.00th=[ 51], 90.00th=[ 86], 95.00th=[ 131], | 99.00th=[ 232], 99.50th=[ 288], 99.90th=[ 288], 99.95th=[ 288], | 99.99th=[ 288] bw ( KiB/s): min= 21, max= 384, per=28.28%, avg=91.05, stdev=61.53, samples=123 iops : min= 1, max= 24, avg= 4.89, stdev= 3.92, samples=123 write: IOPS=5, BW=88.0KiB/s (90.1kB/s)(6544KiB/74337msec); 0 zone resets clat (msec): min=44, max=380, avg=145.95, stdev=62.10 lat (msec): min=44, max=380, avg=145.95, stdev=62.10 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 64], 10.00th=[ 74], 20.00th=[ 93], | 30.00th=[ 108], 40.00th=[ 123], 50.00th=[ 134], 60.00th=[ 148], | 70.00th=[ 167], 80.00th=[ 192], 90.00th=[ 232], 95.00th=[ 271], | 99.00th=[ 330], 99.50th=[ 342], 99.90th=[ 380], 99.95th=[ 380], | 99.99th=[ 380] bw ( KiB/s): min= 30, max= 256, per=25.89%, avg=87.52, stdev=40.32, samples=146 iops : min= 1, max= 16, avg= 4.66, stdev= 2.59, samples=146 lat (msec) : 10=1.43%, 20=11.85%, 50=24.87%, 100=17.97%, 250=39.32% lat (msec) : 500=4.56% cpu : usr=0.04%, sys=1.07%, ctx=1261, 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=144373: Thu Aug 27 13:56:57 2026 read: IOPS=5, BW=88.4KiB/s (90.6kB/s)(6256KiB/70742msec) clat (msec): min=6, max=312, avg=38.40, stdev=38.43 lat (msec): min=6, max=312, avg=38.40, stdev=38.43 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 27], 60.00th=[ 31], | 70.00th=[ 37], 80.00th=[ 46], 90.00th=[ 77], 95.00th=[ 116], | 99.00th=[ 201], 99.50th=[ 271], 99.90th=[ 313], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 30, max= 318, per=29.73%, avg=95.74, stdev=63.58, samples=129 iops : min= 1, max= 19, avg= 5.19, stdev= 4.03, samples=129 write: IOPS=5, BW=85.3KiB/s (87.3kB/s)(6032KiB/70742msec); 0 zone resets clat (msec): min=43, max=443, avg=146.89, stdev=61.23 lat (msec): min=43, max=443, avg=146.89, stdev=61.23 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 71], 10.00th=[ 80], 20.00th=[ 95], | 30.00th=[ 110], 40.00th=[ 124], 50.00th=[ 138], 60.00th=[ 155], | 70.00th=[ 167], 80.00th=[ 190], 90.00th=[ 228], 95.00th=[ 268], | 99.00th=[ 351], 99.50th=[ 376], 99.90th=[ 443], 99.95th=[ 443], | 99.99th=[ 443] bw ( KiB/s): min= 21, max= 191, per=25.12%, avg=84.92, stdev=36.78, samples=139 iops : min= 1, max= 11, avg= 4.50, stdev= 2.32, samples=139 lat (msec) : 10=2.21%, 20=13.80%, 50=26.56%, 100=16.54%, 250=37.63% lat (msec) : 500=3.26% cpu : usr=0.03%, sys=1.11%, ctx=1285, majf=0, minf=12 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=144374: Thu Aug 27 13:56:57 2026 read: IOPS=5, BW=82.9KiB/s (84.9kB/s)(6032KiB/72750msec) clat (msec): min=8, max=226, avg=39.45, stdev=37.30 lat (msec): min=8, max=226, avg=39.45, stdev=37.30 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 30], | 70.00th=[ 39], 80.00th=[ 54], 90.00th=[ 89], 95.00th=[ 122], | 99.00th=[ 194], 99.50th=[ 222], 99.90th=[ 228], 99.95th=[ 228], | 99.99th=[ 228] bw ( KiB/s): min= 30, max= 413, per=30.35%, avg=97.73, stdev=67.11, samples=120 iops : min= 1, max= 25, avg= 5.30, stdev= 4.21, samples=120 write: IOPS=5, BW=85.0KiB/s (88.1kB/s)(6256KiB/72750msec); 0 zone resets clat (msec): min=39, max=446, avg=146.84, stdev=63.30 lat (msec): min=39, max=446, avg=146.84, stdev=63.30 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 70], 10.00th=[ 81], 20.00th=[ 97], | 30.00th=[ 113], 40.00th=[ 123], 50.00th=[ 136], 60.00th=[ 150], | 70.00th=[ 165], 80.00th=[ 184], 90.00th=[ 230], 95.00th=[ 259], | 99.00th=[ 393], 99.50th=[ 439], 99.90th=[ 447], 99.95th=[ 447], | 99.99th=[ 447] bw ( KiB/s): min= 30, max= 191, per=25.72%, avg=86.94, stdev=36.67, samples=141 iops : min= 1, max= 11, avg= 4.62, stdev= 2.35, samples=141 lat (msec) : 10=1.30%, 20=14.97%, 50=22.66%, 100=17.19%, 250=40.49% lat (msec) : 500=3.39% cpu : usr=0.04%, sys=1.13%, ctx=1216, 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=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=322KiB/s (330kB/s), 77.3KiB/s-88.4KiB/s (79.1kB/s-90.6kB/s), io=23.4MiB (24.5MB), run=70742-74337msec WRITE: bw=339KiB/s (347kB/s), 85.3KiB/s-88.0KiB/s (87.3kB/s-90.1kB/s), io=24.6MiB (25.8MB), run=70742-74337msec mix direct rw 1048576 by fio with 4 jobs... mix buffer rw 1048576 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=144394: Thu Aug 27 13:57:15 2026 read: IOPS=1, BW=1547KiB/s (1584kB/s)(7168KiB/4633msec) clat (usec): min=556, max=330594, avg=171358.16, stdev=106756.22 lat (usec): min=557, max=330595, avg=171359.70, stdev=106756.41 clat percentiles (usec): | 1.00th=[ 553], 5.00th=[ 553], 10.00th=[ 553], 20.00th=[114820], | 30.00th=[124257], 40.00th=[124257], 50.00th=[158335], 60.00th=[225444], | 70.00th=[225444], 80.00th=[244319], 90.00th=[329253], 95.00th=[329253], | 99.00th=[329253], 99.50th=[329253], 99.90th=[329253], 99.95th=[329253], | 99.99th=[329253] bw ( KiB/s): min= 1607, max= 4096, per=97.81%, avg=3133.00, stdev=1336.60, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 write: IOPS=1, BW=1105KiB/s (1132kB/s)(5120KiB/4633msec); 0 zone resets clat (msec): min=87, max=2482, avg=622.43, stdev=1041.36 lat (msec): min=87, max=2482, avg=622.51, stdev=1041.35 clat percentiles (msec): | 1.00th=[ 88], 5.00th=[ 88], 10.00th=[ 88], 20.00th=[ 88], | 30.00th=[ 125], 40.00th=[ 125], 50.00th=[ 178], 60.00th=[ 178], | 70.00th=[ 243], 80.00th=[ 243], 90.00th=[ 2467], 95.00th=[ 2467], | 99.00th=[ 2467], 99.50th=[ 2467], 99.90th=[ 2467], 99.95th=[ 2467], | 99.99th=[ 2467] bw ( KiB/s): min= 1950, max= 4096, per=67.42%, avg=3023.00, stdev=1517.45, samples=2 iops : min= 1, max= 4, avg= 2.50, stdev= 2.12, samples=2 lat (usec) : 750=8.33% lat (msec) : 100=8.33%, 250=66.67%, 500=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.37%, ctx=170, 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=7,5,0,0 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=144395: Thu Aug 27 13:57:15 2026 read: IOPS=0, BW=320KiB/s (328kB/s)(2048KiB/6393msec) clat (usec): min=557, max=2412.4k, avg=1206461.95, stdev=1705406.26 lat (usec): min=558, max=2412.4k, avg=1206464.09, stdev=1705407.56 clat percentiles (usec): | 1.00th=[ 562], 5.00th=[ 562], 10.00th=[ 562], | 20.00th=[ 562], 30.00th=[ 562], 40.00th=[ 562], | 50.00th=[ 562], 60.00th=[2399142], 70.00th=[2399142], | 80.00th=[2399142], 90.00th=[2399142], 95.00th=[2399142], | 99.00th=[2399142], 99.50th=[2399142], 99.90th=[2399142], | 99.95th=[2399142], 99.99th=[2399142] bw ( KiB/s): min= 1921, max= 2039, per=61.82%, avg=1980.00, stdev=83.44, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1602KiB/s (1640kB/s)(10.0MiB/6393msec); 0 zone resets clat (msec): min=139, max=1428, avg=382.06, stdev=382.86 lat (msec): min=140, max=1428, avg=382.37, stdev=382.78 clat percentiles (msec): | 1.00th=[ 140], 5.00th=[ 140], 10.00th=[ 140], 20.00th=[ 163], | 30.00th=[ 178], 40.00th=[ 199], 50.00th=[ 255], 60.00th=[ 275], | 70.00th=[ 305], 80.00th=[ 409], 90.00th=[ 468], 95.00th=[ 1435], | 99.00th=[ 1435], 99.50th=[ 1435], 99.90th=[ 1435], 99.95th=[ 1435], | 99.99th=[ 1435] bw ( KiB/s): min= 1954, max= 4031, per=78.39%, avg=3515.20, stdev=876.03, samples=5 iops : min= 1, max= 3, avg= 2.60, stdev= 0.89, samples=5 lat (usec) : 750=8.33% lat (msec) : 250=33.33%, 500=41.67%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.73%, ctx=386, 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=2,10,0,0 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=144398: Thu Aug 27 13:57:15 2026 read: IOPS=1, BW=1629KiB/s (1668kB/s)(6144KiB/3772msec) clat (msec): min=108, max=994, avg=369.60, stdev=336.89 lat (msec): min=108, max=994, avg=369.60, stdev=336.89 clat percentiles (msec): | 1.00th=[ 109], 5.00th=[ 109], 10.00th=[ 109], 20.00th=[ 146], | 30.00th=[ 146], 40.00th=[ 205], 50.00th=[ 205], 60.00th=[ 257], | 70.00th=[ 506], 80.00th=[ 506], 90.00th=[ 995], 95.00th=[ 995], | 99.00th=[ 995], 99.50th=[ 995], 99.90th=[ 995], 99.95th=[ 995], | 99.99th=[ 995] bw ( KiB/s): min= 1950, max= 6071, per=100.00%, avg=3353.33, stdev=2353.99, samples=3 iops : min= 1, max= 5, avg= 2.33, stdev= 2.31, samples=3 write: IOPS=1, BW=1629KiB/s (1668kB/s)(6144KiB/3772msec); 0 zone resets clat (msec): min=68, max=397, avg=232.98, stdev=134.25 lat (msec): min=68, max=397, avg=233.09, stdev=134.25 clat percentiles (msec): | 1.00th=[ 69], 5.00th=[ 69], 10.00th=[ 69], 20.00th=[ 113], | 30.00th=[ 113], 40.00th=[ 167], 50.00th=[ 167], 60.00th=[ 317], | 70.00th=[ 334], 80.00th=[ 334], 90.00th=[ 397], 95.00th=[ 397], | 99.00th=[ 397], 99.50th=[ 397], 99.90th=[ 397], 99.95th=[ 397], | 99.99th=[ 397] bw ( KiB/s): min= 1565, max= 3696, per=49.90%, avg=2237.60, stdev=834.94, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 100=8.33%, 250=41.67%, 500=33.33%, 750=8.33%, 1000=8.33% cpu : usr=0.03%, sys=15.19%, ctx=284, majf=0, minf=12 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=6,6,0,0 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=144400: Thu Aug 27 13:57:15 2026 read: IOPS=1, BW=1153KiB/s (1180kB/s)(5120KiB/4442msec) clat (usec): min=817, max=256615, avg=108250.68, stdev=112992.62 lat (usec): min=818, max=256617, avg=108252.14, stdev=112993.08 clat percentiles (usec): | 1.00th=[ 816], 5.00th=[ 816], 10.00th=[ 816], 20.00th=[ 816], | 30.00th=[ 898], 40.00th=[ 898], 50.00th=[ 98042], 60.00th=[ 98042], | 70.00th=[185598], 80.00th=[185598], 90.00th=[256902], 95.00th=[256902], | 99.00th=[256902], 99.50th=[256902], 99.90th=[256902], 99.95th=[256902], | 99.99th=[256902] bw ( KiB/s): min= 1950, max= 6144, per=100.00%, avg=4047.00, stdev=2965.61, samples=2 iops : min= 1, max= 6, avg= 3.50, stdev= 3.54, samples=2 write: IOPS=1, BW=1614KiB/s (1652kB/s)(7168KiB/4442msec); 0 zone resets clat (msec): min=105, max=2417, avg=544.74, stdev=832.11 lat (msec): min=105, max=2417, avg=544.84, stdev=832.11 clat percentiles (msec): | 1.00th=[ 106], 5.00th=[ 106], 10.00th=[ 106], 20.00th=[ 118], | 30.00th=[ 211], 40.00th=[ 211], 50.00th=[ 262], 60.00th=[ 305], | 70.00th=[ 305], 80.00th=[ 397], 90.00th=[ 2433], 95.00th=[ 2433], | 99.00th=[ 2433], 99.50th=[ 2433], 99.90th=[ 2433], 99.95th=[ 2433], | 99.99th=[ 2433] bw ( KiB/s): min= 1521, max= 4096, per=50.71%, avg=2273.80, stdev=1033.87, samples=5 iops : min= 1, max= 4, avg= 1.60, stdev= 1.34, samples=5 lat (usec) : 1000=16.67% lat (msec) : 100=8.33%, 250=33.33%, 500=33.33%, >=2000=8.33% cpu : usr=0.02%, sys=10.34%, ctx=162, majf=0, minf=14 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=5,7,0,0 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=3204KiB/s (3280kB/s), 320KiB/s-1629KiB/s (328kB/s-1668kB/s), io=20.0MiB (20.0MB), run=3772-6393msec WRITE: bw=4485KiB/s (4593kB/s), 1105KiB/s-1629KiB/s (1132kB/s-1668kB/s), io=28.0MiB (29.4MB), run=3772-6393msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144396: Thu Aug 27 13:57:16 2026 read: IOPS=1, BW=1234KiB/s (1264kB/s)(7168KiB/5807msec) clat (msec): min=66, max=550, avg=203.75, stdev=172.28 lat (msec): min=66, max=550, avg=203.75, stdev=172.28 clat percentiles (msec): | 1.00th=[ 67], 5.00th=[ 67], 10.00th=[ 67], 20.00th=[ 105], | 30.00th=[ 108], 40.00th=[ 108], 50.00th=[ 108], 60.00th=[ 184], | 70.00th=[ 184], 80.00th=[ 305], 90.00th=[ 550], 95.00th=[ 550], | 99.00th=[ 550], 99.50th=[ 550], 99.90th=[ 550], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 2011, max= 4096, per=100.00%, avg=2993.25, stdev=1127.73, samples=4 iops : min= 1, max= 4, avg= 2.25, stdev= 1.50, samples=4 write: IOPS=0, BW=882KiB/s (903kB/s)(5120KiB/5807msec); 0 zone resets clat (msec): min=142, max=2689, avg=762.08, stdev=1082.92 lat (msec): min=142, max=2690, avg=762.22, stdev=1082.94 clat percentiles (msec): | 1.00th=[ 142], 5.00th=[ 142], 10.00th=[ 142], 20.00th=[ 142], | 30.00th=[ 211], 40.00th=[ 211], 50.00th=[ 372], 60.00th=[ 372], | 70.00th=[ 397], 80.00th=[ 397], 90.00th=[ 2702], 95.00th=[ 2702], | 99.00th=[ 2702], 99.50th=[ 2702], 99.90th=[ 2702], 99.95th=[ 2702], | 99.99th=[ 2702] bw ( KiB/s): min= 3835, max= 4071, per=98.68%, avg=3953.00, stdev=166.88, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 lat (msec) : 100=8.33%, 250=50.00%, 500=25.00%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.51%, ctx=67, majf=0, minf=12 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=7,5,0,0 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=144397: Thu Aug 27 13:57:16 2026 read: IOPS=0, BW=286KiB/s (293kB/s)(2048KiB/7156msec) clat (msec): min=103, max=2140, avg=1122.12, stdev=1440.03 lat (msec): min=103, max=2140, avg=1122.12, stdev=1440.03 clat percentiles (msec): | 1.00th=[ 105], 5.00th=[ 105], 10.00th=[ 105], 20.00th=[ 105], | 30.00th=[ 105], 40.00th=[ 105], 50.00th=[ 105], 60.00th=[ 2140], | 70.00th=[ 2140], 80.00th=[ 2140], 90.00th=[ 2140], 95.00th=[ 2140], | 99.00th=[ 2140], 99.50th=[ 2140], 99.90th=[ 2140], 99.95th=[ 2140], | 99.99th=[ 2140] bw ( KiB/s): min= 1954, max= 2000, per=69.10%, avg=1977.00, stdev=32.53, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1431KiB/s (1465kB/s)(10.0MiB/7156msec); 0 zone resets clat (msec): min=170, max=1117, avg=438.79, stdev=284.11 lat (msec): min=171, max=1117, avg=438.96, stdev=284.08 clat percentiles (msec): | 1.00th=[ 171], 5.00th=[ 171], 10.00th=[ 171], 20.00th=[ 257], | 30.00th=[ 262], 40.00th=[ 284], 50.00th=[ 292], 60.00th=[ 326], | 70.00th=[ 485], 80.00th=[ 506], 90.00th=[ 693], 95.00th=[ 1116], | 99.00th=[ 1116], 99.50th=[ 1116], 99.90th=[ 1116], 99.95th=[ 1116], | 99.99th=[ 1116] bw ( KiB/s): min= 1917, max= 6119, per=64.51%, avg=2584.14, stdev=1559.20, samples=7 iops : min= 1, max= 5, avg= 1.57, stdev= 1.51, samples=7 lat (msec) : 250=16.67%, 500=50.00%, 750=16.67%, 2000=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=3.31%, ctx=105, 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=2,10,0,0 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=144399: Thu Aug 27 13:57:16 2026 read: IOPS=1, BW=1133KiB/s (1161kB/s)(6144KiB/5421msec) clat (msec): min=69, max=1088, avg=453.75, stdev=450.86 lat (msec): min=69, max=1088, avg=453.76, stdev=450.85 clat percentiles (msec): | 1.00th=[ 69], 5.00th=[ 69], 10.00th=[ 69], 20.00th=[ 120], | 30.00th=[ 120], 40.00th=[ 159], 50.00th=[ 159], 60.00th=[ 334], | 70.00th=[ 953], 80.00th=[ 953], 90.00th=[ 1083], 95.00th=[ 1083], | 99.00th=[ 1083], 99.50th=[ 1083], 99.90th=[ 1083], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 1917, max= 4071, per=100.00%, avg=3298.67, stdev=1199.33, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1133KiB/s (1161kB/s)(6144KiB/5421msec); 0 zone resets clat (msec): min=197, max=780, avg=398.60, stdev=208.40 lat (msec): min=197, max=780, avg=398.71, stdev=208.38 clat percentiles (msec): | 1.00th=[ 199], 5.00th=[ 199], 10.00th=[ 199], 20.00th=[ 271], | 30.00th=[ 271], 40.00th=[ 305], 50.00th=[ 305], 60.00th=[ 372], | 70.00th=[ 468], 80.00th=[ 468], 90.00th=[ 776], 95.00th=[ 776], | 99.00th=[ 776], 99.50th=[ 776], 99.90th=[ 776], 99.95th=[ 776], | 99.99th=[ 776] bw ( KiB/s): min= 2035, max= 4063, per=63.59%, avg=2547.25, stdev=1010.51, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 lat (msec) : 100=8.33%, 250=25.00%, 500=41.67%, 1000=16.67%, 2000=8.33% cpu : usr=0.00%, sys=2.45%, ctx=80, majf=0, minf=12 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=6,6,0,0 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=144401: Thu Aug 27 13:57:16 2026 read: IOPS=0, BW=864KiB/s (884kB/s)(5120KiB/5929msec) clat (msec): min=61, max=290, avg=137.75, stdev=100.11 lat (msec): min=61, max=290, avg=137.75, stdev=100.11 clat percentiles (msec): | 1.00th=[ 62], 5.00th=[ 62], 10.00th=[ 62], 20.00th=[ 62], | 30.00th=[ 73], 40.00th=[ 73], 50.00th=[ 73], 60.00th=[ 73], | 70.00th=[ 190], 80.00th=[ 190], 90.00th=[ 292], 95.00th=[ 292], | 99.00th=[ 292], 99.50th=[ 292], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 1917, max= 6107, per=100.00%, avg=4012.00, stdev=2962.78, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1209KiB/s (1238kB/s)(7168KiB/5929msec); 0 zone resets clat (msec): min=251, max=2589, avg=738.09, stdev=831.07 lat (msec): min=251, max=2590, avg=738.38, stdev=831.00 clat percentiles (msec): | 1.00th=[ 251], 5.00th=[ 251], 10.00th=[ 251], 20.00th=[ 284], | 30.00th=[ 355], 40.00th=[ 355], 50.00th=[ 430], 60.00th=[ 584], | 70.00th=[ 584], 80.00th=[ 676], 90.00th=[ 2601], 95.00th=[ 2601], | 99.00th=[ 2601], 99.50th=[ 2601], 99.90th=[ 2601], 99.95th=[ 2601], | 99.99th=[ 2601] bw ( KiB/s): min= 1917, max= 4023, per=59.97%, avg=2402.20, stdev=907.46, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 lat (msec) : 100=25.00%, 250=8.33%, 500=41.67%, 750=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=3.32%, ctx=83, 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=5,7,0,0 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=2862KiB/s (2931kB/s), 286KiB/s-1234KiB/s (293kB/s-1264kB/s), io=20.0MiB (20.0MB), run=5421-7156msec WRITE: bw=4007KiB/s (4103kB/s), 882KiB/s-1431KiB/s (903kB/s-1465kB/s), io=28.0MiB (29.4MB), run=5421-7156msec mix direct rw 4194304 by fio with 4 jobs... mix buffer rw 4194304 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096KiB-4096KiB, (W) 4096KiB-4096KiB, (T) 4096KiB-4096KiB, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096KiB-4096KiB, (W) 4096KiB-4096KiB, (T) 4096KiB-4096KiB, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=144407: Thu Aug 27 13:57:33 2026 read: IOPS=0, BW=2931KiB/s (3002kB/s)(12.0MiB/4192msec) clat (msec): min=818, max=2427, avg=1371.06, stdev=915.31 lat (msec): min=818, max=2427, avg=1371.06, stdev=915.31 clat percentiles (msec): | 1.00th=[ 818], 5.00th=[ 818], 10.00th=[ 818], 20.00th=[ 818], | 30.00th=[ 818], 40.00th=[ 869], 50.00th=[ 869], 60.00th=[ 869], | 70.00th=[ 2433], 80.00th=[ 2433], 90.00th=[ 2433], 95.00th=[ 2433], | 99.00th=[ 2433], 99.50th=[ 2433], 99.90th=[ 2433], 99.95th=[ 2433], | 99.99th=[ 2433] bw ( KiB/s): min= 8015, max= 8159, per=100.00%, avg=8087.00, stdev=101.82, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=7.44%, ctx=289, majf=0, minf=9 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=3,0,0,0 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=144408: Thu Aug 27 13:57:33 2026 read: IOPS=0, BW=1054KiB/s (1079kB/s)(4096KiB/3886msec) clat (nsec): min=931422k, max=931422k, avg=931421586.00, stdev= 0.00 lat (nsec): min=931425k, max=931425k, avg=931425073.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 936], 5.00th=[ 936], 10.00th=[ 936], 20.00th=[ 936], | 30.00th=[ 936], 40.00th=[ 936], 50.00th=[ 936], 60.00th=[ 936], | 70.00th=[ 936], 80.00th=[ 936], 90.00th=[ 936], 95.00th=[ 936], | 99.00th=[ 936], 99.50th=[ 936], 99.90th=[ 936], 99.95th=[ 936], | 99.99th=[ 936] bw ( KiB/s): min= 7937, max= 7937, per=100.00%, avg=7937.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2108KiB/s (2159kB/s)(8192KiB/3886msec); 0 zone resets clat (msec): min=467, max=2273, avg=1370.91, stdev=1277.13 lat (msec): min=468, max=2276, avg=1372.63, stdev=1278.55 clat percentiles (msec): | 1.00th=[ 468], 5.00th=[ 468], 10.00th=[ 468], 20.00th=[ 468], | 30.00th=[ 468], 40.00th=[ 468], 50.00th=[ 468], 60.00th=[ 2265], | 70.00th=[ 2265], 80.00th=[ 2265], 90.00th=[ 2265], 95.00th=[ 2265], | 99.00th=[ 2265], 99.50th=[ 2265], 99.90th=[ 2265], 99.95th=[ 2265], | 99.99th=[ 2265] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 1000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=5.20%, ctx=126, 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=1,2,0,0 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=144409: Thu Aug 27 13:57:33 2026 write: IOPS=0, BW=2430KiB/s (2488kB/s)(12.0MiB/5057msec); 0 zone resets clat (msec): min=914, max=2048, avg=1651.76, stdev=638.95 lat (msec): min=915, max=2055, avg=1654.10, stdev=640.81 clat percentiles (msec): | 1.00th=[ 919], 5.00th=[ 919], 10.00th=[ 919], 20.00th=[ 919], | 30.00th=[ 919], 40.00th=[ 1989], 50.00th=[ 1989], 60.00th=[ 1989], | 70.00th=[ 2056], 80.00th=[ 2056], 90.00th=[ 2056], 95.00th=[ 2056], | 99.00th=[ 2056], 99.50th=[ 2056], 99.90th=[ 2056], 99.95th=[ 2056], | 99.99th=[ 2056] bw ( KiB/s): min= 8110, max= 8143, per=100.00%, avg=8126.50, stdev=23.33, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.96%, ctx=50, majf=0, minf=8 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=0,3,0,0 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=144410: Thu Aug 27 13:57:33 2026 write: IOPS=1, BW=4566KiB/s (4676kB/s)(12.0MiB/2691msec); 0 zone resets clat (msec): min=316, max=1542, avg=835.36, stdev=634.02 lat (msec): min=317, max=1544, avg=838.29, stdev=633.91 clat percentiles (msec): | 1.00th=[ 317], 5.00th=[ 317], 10.00th=[ 317], 20.00th=[ 317], | 30.00th=[ 317], 40.00th=[ 651], 50.00th=[ 651], 60.00th=[ 651], | 70.00th=[ 1536], 80.00th=[ 1536], 90.00th=[ 1536], 95.00th=[ 1536], | 99.00th=[ 1536], 99.50th=[ 1536], 99.90th=[ 1536], 99.95th=[ 1536], | 99.99th=[ 1536] bw ( KiB/s): min=15875, max=15875, per=100.00%, avg=15875.00, stdev= 0.00, samples=1 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.64%, ctx=52, majf=0, minf=9 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=0,3,0,0 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=3908KiB/s (4002kB/s), 1054KiB/s-2931KiB/s (1079kB/s-3002kB/s), io=16.0MiB (16.8MB), run=3886-4192msec WRITE: bw=6480KiB/s (6635kB/s), 2108KiB/s-4566KiB/s (2159kB/s-4676kB/s), io=32.0MiB (33.6MB), run=2691-5057msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144413: Thu Aug 27 13:57:34 2026 read: IOPS=0, BW=2829KiB/s (2897kB/s)(12.0MiB/4344msec) clat (msec): min=463, max=2099, avg=1435.95, stdev=860.88 lat (msec): min=463, max=2099, avg=1435.96, stdev=860.88 clat percentiles (msec): | 1.00th=[ 464], 5.00th=[ 464], 10.00th=[ 464], 20.00th=[ 464], | 30.00th=[ 464], 40.00th=[ 1754], 50.00th=[ 1754], 60.00th=[ 1754], | 70.00th=[ 2106], 80.00th=[ 2106], 90.00th=[ 2106], 95.00th=[ 2106], | 99.00th=[ 2106], 99.50th=[ 2106], 99.90th=[ 2106], 99.95th=[ 2106], | 99.99th=[ 2106] bw ( KiB/s): min= 8047, max= 8175, per=100.00%, avg=8111.00, stdev=90.51, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.03%, ctx=47, majf=0, minf=9 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=3,0,0,0 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=144414: Thu Aug 27 13:57:34 2026 read: IOPS=0, BW=987KiB/s (1011kB/s)(4096KiB/4149msec) clat (nsec): min=2021.3M, max=2021.3M, avg=2021316046.00, stdev= 0.00 lat (nsec): min=2021.3M, max=2021.3M, avg=2021318716.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 2022], 5.00th=[ 2022], 10.00th=[ 2022], 20.00th=[ 2022], | 30.00th=[ 2022], 40.00th=[ 2022], 50.00th=[ 2022], 60.00th=[ 2022], | 70.00th=[ 2022], 80.00th=[ 2022], 90.00th=[ 2022], 95.00th=[ 2022], | 99.00th=[ 2022], 99.50th=[ 2022], 99.90th=[ 2022], 99.95th=[ 2022], | 99.99th=[ 2022] bw ( KiB/s): min= 8126, max= 8126, per=100.00%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1974KiB/s (2022kB/s)(8192KiB/4149msec); 0 zone resets clat (msec): min=865, max=1252, avg=1059.43, stdev=273.66 lat (msec): min=866, max=1256, avg=1061.58, stdev=276.10 clat percentiles (msec): | 1.00th=[ 869], 5.00th=[ 869], 10.00th=[ 869], 20.00th=[ 869], | 30.00th=[ 869], 40.00th=[ 869], 50.00th=[ 869], 60.00th=[ 1250], | 70.00th=[ 1250], 80.00th=[ 1250], 90.00th=[ 1250], 95.00th=[ 1250], | 99.00th=[ 1250], 99.50th=[ 1250], 99.90th=[ 1250], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 8159, max= 8159, per=100.00%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 1000=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=3.38%, ctx=53, majf=0, minf=10 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=1,2,0,0 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=144415: Thu Aug 27 13:57:34 2026 write: IOPS=0, BW=2956KiB/s (3027kB/s)(12.0MiB/4157msec); 0 zone resets clat (msec): min=511, max=2212, avg=1368.92, stdev=850.49 lat (msec): min=512, max=2219, avg=1371.55, stdev=853.53 clat percentiles (msec): | 1.00th=[ 514], 5.00th=[ 514], 10.00th=[ 514], 20.00th=[ 514], | 30.00th=[ 514], 40.00th=[ 1385], 50.00th=[ 1385], 60.00th=[ 1385], | 70.00th=[ 2198], 80.00th=[ 2198], 90.00th=[ 2198], 95.00th=[ 2198], | 99.00th=[ 2198], 99.50th=[ 2198], 99.90th=[ 2198], 99.95th=[ 2198], | 99.99th=[ 2198] bw ( KiB/s): min= 8094, max= 8126, per=100.00%, avg=8110.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.07%, sys=2.65%, ctx=38, majf=0, minf=8 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=0,3,0,0 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=144416: Thu Aug 27 13:57:34 2026 write: IOPS=0, BW=3407KiB/s (3488kB/s)(12.0MiB/3607msec); 0 zone resets clat (msec): min=491, max=2426, avg=1195.31, stdev=1069.78 lat (msec): min=496, max=2428, avg=1199.40, stdev=1067.98 clat percentiles (msec): | 1.00th=[ 493], 5.00th=[ 493], 10.00th=[ 493], 20.00th=[ 493], | 30.00th=[ 493], 40.00th=[ 667], 50.00th=[ 667], 60.00th=[ 667], | 70.00th=[ 2433], 80.00th=[ 2433], 90.00th=[ 2433], 95.00th=[ 2433], | 99.00th=[ 2433], 99.50th=[ 2433], 99.90th=[ 2433], 99.95th=[ 2433], | 99.99th=[ 2433] bw ( KiB/s): min= 7892, max= 8143, per=100.00%, avg=8017.50, stdev=177.48, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.86%, ctx=34, majf=0, minf=9 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=0,3,0,0 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=3772KiB/s (3862kB/s), 987KiB/s-2829KiB/s (1011kB/s-2897kB/s), io=16.0MiB (16.8MB), run=4149-4344msec WRITE: bw=7883KiB/s (8072kB/s), 1974KiB/s-3407KiB/s (2022kB/s-3488kB/s), io=32.0MiB (33.6MB), run=3607-4157msec