== sanity test 398b: DIO and buffer IO race ============== 12:40:26 (1788194426) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.67574 s, 8.9 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=144593: Mon Aug 31 12:43:31 2026 read: IOPS=9, BW=37.4KiB/s (38.3kB/s)(5992KiB/160278msec) clat (usec): min=34, max=1043.0k, avg=52358.14, stdev=46591.11 lat (usec): min=34, max=1043.0k, avg=52360.90, stdev=46590.62 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 58], 10.00th=[ 219], | 20.00th=[ 23200], 30.00th=[ 30540], 40.00th=[ 36439], | 50.00th=[ 44303], 60.00th=[ 53216], 70.00th=[ 62129], | 80.00th=[ 78119], 90.00th=[ 99091], 95.00th=[ 125305], | 99.00th=[ 185598], 99.50th=[ 212861], 99.90th=[ 333448], | 99.95th=[1044382], 99.99th=[1044382] bw ( KiB/s): min= 7, max= 79, per=25.74%, avg=37.33, stdev=16.68, samples=311 iops : min= 1, max= 19, avg= 8.68, stdev= 4.20, samples=311 write: IOPS=9, BW=39.3KiB/s (40.2kB/s)(6296KiB/160278msec); 0 zone resets clat (usec): min=1101, max=919448, avg=51745.79, stdev=57178.44 lat (usec): min=1103, max=919449, avg=51750.29, stdev=57178.73 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1319], 10.00th=[ 1893], 20.00th=[ 5211], | 30.00th=[ 10290], 40.00th=[ 21627], 50.00th=[ 35914], 60.00th=[ 50070], | 70.00th=[ 69731], 80.00th=[ 90702], 90.00th=[123208], 95.00th=[152044], | 99.00th=[233833], 99.50th=[287310], 99.90th=[346031], 99.95th=[918553], | 99.99th=[918553] bw ( KiB/s): min= 7, max= 111, per=25.99%, avg=39.50, stdev=18.38, samples=309 iops : min= 1, max= 27, avg= 9.22, stdev= 4.63, samples=309 lat (usec) : 50=0.46%, 100=4.10%, 250=0.33%, 500=0.07%, 750=0.03% lat (usec) : 1000=0.03% lat (msec) : 2=5.40%, 4=3.06%, 10=6.64%, 20=7.45%, 50=30.60% lat (msec) : 100=28.58%, 250=12.79%, 500=0.39%, 1000=0.03%, 2000=0.03% cpu : usr=0.06%, sys=4.21%, ctx=6363, 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=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=144596: Mon Aug 31 12:43:31 2026 read: IOPS=9, BW=37.4KiB/s (38.3kB/s)(5940KiB/158633msec) clat (usec): min=31, max=486925, avg=50957.32, stdev=44157.28 lat (usec): min=31, max=486926, avg=50960.97, stdev=44158.00 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 59], 10.00th=[ 215], 20.00th=[ 22938], | 30.00th=[ 29754], 40.00th=[ 34866], 50.00th=[ 41157], 60.00th=[ 49546], | 70.00th=[ 59507], 80.00th=[ 72877], 90.00th=[100140], 95.00th=[124257], | 99.00th=[204473], 99.50th=[312476], 99.90th=[404751], 99.95th=[488637], | 99.99th=[488637] bw ( KiB/s): min= 5, max= 119, per=25.73%, avg=37.31, stdev=18.48, samples=309 iops : min= 1, max= 29, avg= 8.67, stdev= 4.65, samples=309 write: IOPS=10, BW=40.0KiB/s (40.0kB/s)(6348KiB/158633msec); 0 zone resets clat (usec): min=1130, max=1004.6k, avg=52050.90, stdev=57543.64 lat (usec): min=1131, max=1004.6k, avg=52052.79, stdev=57543.47 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1336], 10.00th=[ 1745], | 20.00th=[ 5866], 30.00th=[ 12256], 40.00th=[ 23987], | 50.00th=[ 36963], 60.00th=[ 52167], 70.00th=[ 68682], | 80.00th=[ 88605], 90.00th=[ 120062], 95.00th=[ 149947], | 99.00th=[ 244319], 99.50th=[ 274727], 99.90th=[ 358613], | 99.95th=[1002439], 99.99th=[1002439] bw ( KiB/s): min= 7, max= 110, per=26.62%, avg=40.47, stdev=19.08, samples=305 iops : min= 1, max= 27, avg= 9.46, stdev= 4.80, samples=305 lat (usec) : 50=0.55%, 100=4.17%, 250=0.13%, 500=0.13%, 750=0.10% lat (usec) : 1000=0.03% lat (msec) : 2=5.96%, 4=2.34%, 10=6.15%, 20=7.71%, 50=32.29% lat (msec) : 100=27.67%, 250=11.98%, 500=0.75%, 2000=0.03% cpu : usr=0.05%, sys=4.40%, ctx=6454, 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=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=144597: Mon Aug 31 12:43:31 2026 read: IOPS=9, BW=36.6KiB/s (37.5kB/s)(6028KiB/164500msec) clat (usec): min=28, max=483041, avg=51043.99, stdev=42780.76 lat (usec): min=28, max=483043, avg=51046.88, stdev=42780.12 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 58], 10.00th=[ 103], 20.00th=[ 21103], | 30.00th=[ 28181], 40.00th=[ 34866], 50.00th=[ 41681], 60.00th=[ 51643], | 70.00th=[ 62129], 80.00th=[ 76022], 90.00th=[ 98042], 95.00th=[125305], | 99.00th=[210764], 99.50th=[244319], 99.90th=[396362], 99.95th=[484443], | 99.99th=[484443] bw ( KiB/s): min= 7, max= 128, per=25.48%, avg=36.95, stdev=20.21, samples=317 iops : min= 1, max= 32, avg= 8.59, stdev= 5.09, samples=317 write: IOPS=9, BW=38.1KiB/s (38.0kB/s)(6260KiB/164500msec); 0 zone resets clat (usec): min=1031, max=990247, avg=55723.98, stdev=61691.55 lat (usec): min=1032, max=990248, avg=55726.18, stdev=61691.27 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1369], 10.00th=[ 2114], 20.00th=[ 5932], | 30.00th=[ 12518], 40.00th=[ 27132], 50.00th=[ 40633], 60.00th=[ 54264], | 70.00th=[ 70779], 80.00th=[ 92799], 90.00th=[130548], 95.00th=[170918], | 99.00th=[250610], 99.50th=[283116], 99.90th=[517997], 99.95th=[994051], | 99.99th=[994051] bw ( KiB/s): min= 7, max= 128, per=25.00%, avg=38.00, stdev=19.23, samples=320 iops : min= 1, max= 32, avg= 8.85, stdev= 4.87, samples=320 lat (usec) : 50=0.94%, 100=3.94%, 250=0.29%, 500=0.13%, 750=0.10% lat (msec) : 2=4.82%, 4=3.19%, 10=6.28%, 20=7.29%, 50=30.53% lat (msec) : 100=28.58%, 250=13.22%, 500=0.62%, 750=0.03%, 1000=0.03% cpu : usr=0.06%, sys=4.13%, ctx=6568, 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=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=144598: Mon Aug 31 12:43:31 2026 read: IOPS=9, BW=37.2KiB/s (38.1kB/s)(6052KiB/162603msec) clat (usec): min=34, max=618912, avg=53385.71, stdev=44734.24 lat (usec): min=34, max=618913, avg=53389.69, stdev=44733.34 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 57], 10.00th=[ 91], 20.00th=[ 22938], | 30.00th=[ 30278], 40.00th=[ 36963], 50.00th=[ 44303], 60.00th=[ 52691], | 70.00th=[ 64226], 80.00th=[ 80217], 90.00th=[107480], 95.00th=[130548], | 99.00th=[196084], 99.50th=[240124], 99.90th=[455082], 99.95th=[616563], | 99.99th=[616563] bw ( KiB/s): min= 7, max= 112, per=25.93%, avg=37.59, stdev=18.40, samples=313 iops : min= 1, max= 28, avg= 8.74, stdev= 4.65, samples=313 write: IOPS=9, BW=38.4KiB/s (39.3kB/s)(6236KiB/162603msec); 0 zone resets clat (usec): min=1089, max=1157.5k, avg=52307.86, stdev=61949.53 lat (usec): min=1090, max=1157.5k, avg=52310.98, stdev=61949.18 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1352], 10.00th=[ 1860], | 20.00th=[ 5866], 30.00th=[ 10552], 40.00th=[ 21627], | 50.00th=[ 35914], 60.00th=[ 49546], 70.00th=[ 67634], | 80.00th=[ 91751], 90.00th=[ 126354], 95.00th=[ 154141], | 99.00th=[ 240124], 99.50th=[ 278922], 99.90th=[ 450888], | 99.95th=[1149240], 99.99th=[1149240] bw ( KiB/s): min= 7, max= 108, per=25.30%, avg=38.45, stdev=19.31, samples=315 iops : min= 1, max= 27, avg= 8.96, stdev= 4.89, samples=315 lat (usec) : 50=0.91%, 100=4.13%, 250=0.29%, 500=0.13%, 750=0.10% lat (usec) : 1000=0.10% lat (msec) : 2=5.34%, 4=2.80%, 10=6.84%, 20=7.19%, 50=30.53% lat (msec) : 100=27.21%, 250=13.80%, 500=0.55%, 750=0.03%, 2000=0.03% cpu : usr=0.06%, sys=4.23%, ctx=6410, 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=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=146KiB/s (149kB/s), 36.6KiB/s-37.4KiB/s (37.5kB/s-38.3kB/s), io=23.4MiB (24.6MB), run=158633-164500msec WRITE: bw=153KiB/s (156kB/s), 38.1KiB/s-40.0KiB/s (38.0kB/s-40.0kB/s), io=24.6MiB (25.7MB), run=158633-164500msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144591: Mon Aug 31 12:46:07 2026 read: IOPS=4, BW=18.8KiB/s (19.2kB/s)(5992KiB/319079msec) clat (msec): min=5, max=1049, avg=41.46, stdev=57.44 lat (msec): min=5, max=1049, avg=41.46, stdev=57.44 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 29], | 70.00th=[ 37], 80.00th=[ 54], 90.00th=[ 93], 95.00th=[ 128], | 99.00th=[ 226], 99.50th=[ 271], 99.90th=[ 818], 99.95th=[ 1053], | 99.99th=[ 1053] bw ( KiB/s): min= 7, max= 87, per=30.40%, avg=22.49, stdev=15.52, samples=512 iops : min= 1, max= 21, avg= 5.01, stdev= 3.93, samples=512 write: IOPS=4, BW=19.7KiB/s (20.2kB/s)(6296KiB/319079msec); 0 zone resets clat (msec): min=45, max=859, avg=163.05, stdev=90.15 lat (msec): min=45, max=859, avg=163.06, stdev=90.15 clat percentiles (msec): | 1.00th=[ 58], 5.00th=[ 71], 10.00th=[ 82], 20.00th=[ 96], | 30.00th=[ 111], 40.00th=[ 123], 50.00th=[ 136], 60.00th=[ 155], | 70.00th=[ 182], 80.00th=[ 218], 90.00th=[ 279], 95.00th=[ 342], | 99.00th=[ 468], 99.50th=[ 498], 99.90th=[ 785], 99.95th=[ 860], | 99.99th=[ 860] bw ( KiB/s): min= 7, max= 47, per=25.55%, avg=19.93, stdev= 9.78, samples=604 iops : min= 1, max= 11, avg= 4.36, stdev= 2.51, samples=604 lat (msec) : 10=2.64%, 20=15.85%, 50=20.05%, 100=17.68%, 250=36.13% lat (msec) : 500=7.32%, 750=0.16%, 1000=0.13%, 2000=0.03% cpu : usr=0.03%, sys=1.05%, ctx=5046, 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=144592: Mon Aug 31 12:46:07 2026 read: IOPS=4, BW=18.5KiB/s (18.0kB/s)(5940KiB/320431msec) clat (msec): min=5, max=982, avg=42.14, stdev=52.36 lat (msec): min=5, max=982, avg=42.14, stdev=52.36 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 30], | 70.00th=[ 40], 80.00th=[ 57], 90.00th=[ 96], 95.00th=[ 130], | 99.00th=[ 224], 99.50th=[ 288], 99.90th=[ 550], 99.95th=[ 986], | 99.99th=[ 986] bw ( KiB/s): min= 7, max= 87, per=30.46%, avg=22.54, stdev=15.67, samples=507 iops : min= 1, max= 21, avg= 5.02, stdev= 3.96, samples=507 write: IOPS=4, BW=19.8KiB/s (20.3kB/s)(6348KiB/320431msec); 0 zone resets clat (msec): min=41, max=977, avg=162.27, stdev=88.64 lat (msec): min=41, max=977, avg=162.28, stdev=88.64 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 72], 10.00th=[ 81], 20.00th=[ 96], | 30.00th=[ 109], 40.00th=[ 123], 50.00th=[ 136], 60.00th=[ 155], | 70.00th=[ 182], 80.00th=[ 218], 90.00th=[ 284], 95.00th=[ 338], | 99.00th=[ 472], 99.50th=[ 542], 99.90th=[ 634], 99.95th=[ 978], | 99.99th=[ 978] bw ( KiB/s): min= 7, max= 55, per=25.31%, avg=19.74, stdev=10.07, samples=615 iops : min= 1, max= 13, avg= 4.31, stdev= 2.59, samples=615 lat (msec) : 10=2.77%, 20=15.95%, 50=19.14%, 100=17.81%, 250=36.56% lat (msec) : 500=7.36%, 750=0.36%, 1000=0.07% cpu : usr=0.03%, sys=1.08%, ctx=5226, 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=144594: Mon Aug 31 12:46:07 2026 read: IOPS=4, BW=18.9KiB/s (19.3kB/s)(6028KiB/319074msec) clat (msec): min=5, max=421, avg=42.15, stdev=47.67 lat (msec): min=5, max=421, avg=42.15, stdev=47.67 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 30], | 70.00th=[ 39], 80.00th=[ 59], 90.00th=[ 104], 95.00th=[ 136], | 99.00th=[ 241], 99.50th=[ 288], 99.90th=[ 422], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 7, max= 103, per=29.36%, avg=21.73, stdev=15.75, samples=533 iops : min= 1, max= 25, avg= 4.81, stdev= 3.98, samples=533 write: IOPS=4, BW=19.6KiB/s (20.1kB/s)(6260KiB/319074msec); 0 zone resets clat (msec): min=36, max=1183, avg=163.07, stdev=91.83 lat (msec): min=36, max=1183, avg=163.07, stdev=91.83 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 73], 10.00th=[ 85], 20.00th=[ 100], | 30.00th=[ 111], 40.00th=[ 123], 50.00th=[ 136], 60.00th=[ 153], | 70.00th=[ 178], 80.00th=[ 213], 90.00th=[ 288], 95.00th=[ 334], | 99.00th=[ 481], 99.50th=[ 567], 99.90th=[ 986], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 7, max= 47, per=25.41%, avg=19.82, stdev= 9.86, samples=604 iops : min= 1, max= 11, avg= 4.33, stdev= 2.54, samples=604 lat (msec) : 10=3.03%, 20=15.92%, 50=19.04%, 100=16.54%, 250=37.83% lat (msec) : 500=7.29%, 750=0.29%, 1000=0.03%, 2000=0.03% cpu : usr=0.03%, sys=1.12%, ctx=5231, 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=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=144595: Mon Aug 31 12:46:07 2026 read: IOPS=4, BW=19.1KiB/s (19.5kB/s)(6052KiB/317348msec) clat (msec): min=5, max=755, avg=41.40, stdev=48.44 lat (msec): min=5, max=755, avg=41.41, stdev=48.44 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 39], 80.00th=[ 58], 90.00th=[ 95], 95.00th=[ 136], | 99.00th=[ 218], 99.50th=[ 279], 99.90th=[ 435], 99.95th=[ 760], | 99.99th=[ 760] bw ( KiB/s): min= 7, max= 79, per=30.32%, avg=22.44, stdev=15.99, samples=519 iops : min= 1, max= 19, avg= 4.99, stdev= 4.05, samples=519 write: IOPS=4, BW=19.6KiB/s (20.1kB/s)(6236KiB/317348msec); 0 zone resets clat (msec): min=43, max=1064, avg=163.17, stdev=88.90 lat (msec): min=43, max=1064, avg=163.17, stdev=88.90 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 71], 10.00th=[ 82], 20.00th=[ 96], | 30.00th=[ 110], 40.00th=[ 125], 50.00th=[ 140], 60.00th=[ 157], | 70.00th=[ 182], 80.00th=[ 218], 90.00th=[ 284], 95.00th=[ 342], | 99.00th=[ 464], 99.50th=[ 531], 99.90th=[ 642], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 7, max= 48, per=25.36%, avg=19.78, stdev= 9.85, samples=604 iops : min= 1, max= 12, avg= 4.32, stdev= 2.52, samples=604 lat (msec) : 10=2.34%, 20=17.25%, 50=18.07%, 100=18.72%, 250=36.26% lat (msec) : 500=6.90%, 750=0.39%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.07%, ctx=5109, 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=74.9KiB/s (76.7kB/s), 18.5KiB/s-19.1KiB/s (18.0kB/s-19.5kB/s), io=23.4MiB (24.6MB), run=317348-320431msec WRITE: bw=78.5KiB/s (80.3kB/s), 19.6KiB/s-19.8KiB/s (20.1kB/s-20.3kB/s), io=24.6MiB (25.7MB), run=317348-320431msec 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=144659: Mon Aug 31 12:46:53 2026 read: IOPS=11, BW=187KiB/s (192kB/s)(5920KiB/31650msec) clat (usec): min=33, max=258152, avg=43139.83, stdev=40756.54 lat (usec): min=33, max=258153, avg=43141.08, stdev=40756.51 clat percentiles (usec): | 1.00th=[ 38], 5.00th=[ 48], 10.00th=[ 57], 20.00th=[ 68], | 30.00th=[ 16057], 40.00th=[ 31327], 50.00th=[ 40109], 60.00th=[ 50070], | 70.00th=[ 58983], 80.00th=[ 68682], 90.00th=[ 90702], 95.00th=[109577], | 99.00th=[206570], 99.50th=[229639], 99.90th=[258999], 99.95th=[258999], | 99.99th=[258999] bw ( KiB/s): min= 31, max= 400, per=27.26%, avg=185.90, stdev=84.27, samples=62 iops : min= 1, max= 25, avg=10.92, stdev= 5.38, samples=62 write: IOPS=12, BW=201KiB/s (206kB/s)(6368KiB/31650msec); 0 zone resets clat (usec): min=1508, max=250497, avg=39182.37, stdev=42506.48 lat (usec): min=1510, max=250498, avg=39185.41, stdev=42506.38 clat percentiles (usec): | 1.00th=[ 1598], 5.00th=[ 1795], 10.00th=[ 2212], 20.00th=[ 5866], | 30.00th=[ 9503], 40.00th=[ 13435], 50.00th=[ 21103], 60.00th=[ 36439], | 70.00th=[ 53216], 80.00th=[ 70779], 90.00th=[ 95945], 95.00th=[122160], | 99.00th=[187696], 99.50th=[242222], 99.90th=[250610], 99.95th=[250610], | 99.99th=[250610] bw ( KiB/s): min= 31, max= 448, per=27.98%, avg=200.89, stdev=89.83, samples=62 iops : min= 1, max= 28, avg=11.87, stdev= 5.71, samples=62 lat (usec) : 50=2.73%, 100=9.38%, 250=0.65%, 500=0.26%, 750=0.26% lat (usec) : 1000=0.13% lat (msec) : 2=4.95%, 4=3.65%, 10=8.20%, 20=10.03%, 50=24.09% lat (msec) : 100=27.73%, 250=7.68%, 500=0.26% cpu : usr=0.06%, sys=4.86%, ctx=1294, 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=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=144660: Mon Aug 31 12:46:53 2026 read: IOPS=10, BW=168KiB/s (172kB/s)(5744KiB/34242msec) clat (usec): min=36, max=216724, avg=45973.06, stdev=40081.46 lat (usec): min=36, max=216726, avg=45974.28, stdev=40081.51 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 55], 10.00th=[ 61], 20.00th=[ 87], | 30.00th=[ 21103], 40.00th=[ 33424], 50.00th=[ 44303], 60.00th=[ 54789], | 70.00th=[ 61604], 80.00th=[ 72877], 90.00th=[ 95945], 95.00th=[121111], | 99.00th=[170918], 99.50th=[206570], 99.90th=[217056], 99.95th=[217056], | 99.99th=[217056] bw ( KiB/s): min= 30, max= 320, per=24.77%, avg=168.92, stdev=67.62, samples=66 iops : min= 1, max= 20, avg= 9.82, stdev= 4.28, samples=66 write: IOPS=11, BW=191KiB/s (196kB/s)(6544KiB/34242msec); 0 zone resets clat (usec): min=1518, max=254031, avg=43024.04, stdev=44974.16 lat (usec): min=1542, max=254033, avg=43027.44, stdev=44975.04 clat percentiles (usec): | 1.00th=[ 1614], 5.00th=[ 1844], 10.00th=[ 2769], 20.00th=[ 7111], | 30.00th=[ 10552], 40.00th=[ 16581], 50.00th=[ 27657], 60.00th=[ 38011], | 70.00th=[ 55837], 80.00th=[ 73925], 90.00th=[110625], 95.00th=[132645], | 99.00th=[185598], 99.50th=[204473], 99.90th=[254804], 99.95th=[254804], | 99.99th=[254804] bw ( KiB/s): min= 62, max= 476, per=26.47%, avg=190.07, stdev=79.95, samples=67 iops : min= 3, max= 29, avg=11.16, stdev= 5.06, samples=67 lat (usec) : 50=1.69%, 100=8.33%, 250=0.78%, 500=0.26%, 1000=0.39% lat (msec) : 2=4.17%, 4=2.21%, 10=9.51%, 20=8.59%, 50=26.04% lat (msec) : 100=27.99%, 250=9.90%, 500=0.13% cpu : usr=0.08%, sys=4.99%, ctx=1368, 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=144661: Mon Aug 31 12:46:53 2026 read: IOPS=11, BW=185KiB/s (189kB/s)(6256KiB/33820msec) clat (usec): min=34, max=439913, avg=49566.71, stdev=49741.69 lat (usec): min=34, max=439914, avg=49583.70, stdev=49726.91 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 54], 10.00th=[ 60], 20.00th=[ 80], | 30.00th=[ 26870], 40.00th=[ 34866], 50.00th=[ 43779], 60.00th=[ 51119], | 70.00th=[ 62129], 80.00th=[ 77071], 90.00th=[100140], 95.00th=[128451], | 99.00th=[240124], 99.50th=[362808], 99.90th=[438305], 99.95th=[438305], | 99.99th=[438305] bw ( KiB/s): min= 61, max= 412, per=27.63%, avg=188.42, stdev=75.07, samples=65 iops : min= 3, max= 25, avg=11.06, stdev= 4.72, samples=65 write: IOPS=11, BW=178KiB/s (183kB/s)(6032KiB/33820msec); 0 zone resets clat (usec): min=1554, max=243070, avg=37853.47, stdev=40004.86 lat (usec): min=1556, max=243073, avg=37910.18, stdev=39973.17 clat percentiles (usec): | 1.00th=[ 1696], 5.00th=[ 1991], 10.00th=[ 3261], 20.00th=[ 5866], | 30.00th=[ 8979], 40.00th=[ 13829], 50.00th=[ 22152], 60.00th=[ 34866], | 70.00th=[ 47973], 80.00th=[ 67634], 90.00th=[ 96994], 95.00th=[116917], | 99.00th=[168821], 99.50th=[189793], 99.90th=[242222], 99.95th=[242222], | 99.99th=[242222] bw ( KiB/s): min= 62, max= 384, per=24.88%, avg=178.65, stdev=75.46, samples=65 iops : min= 3, max= 24, avg=10.45, stdev= 4.80, samples=65 lat (usec) : 50=1.95%, 100=9.38%, 250=0.91%, 500=0.26%, 750=0.13% lat (msec) : 2=2.47%, 4=3.78%, 10=10.42%, 20=7.16%, 50=28.52% lat (msec) : 100=25.65%, 250=8.98%, 500=0.39% cpu : usr=0.07%, sys=4.70%, ctx=1249, 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=144662: Mon Aug 31 12:46:53 2026 read: IOPS=10, BW=172KiB/s (176kB/s)(6032KiB/35097msec) clat (usec): min=32, max=260416, avg=46649.08, stdev=43098.61 lat (usec): min=32, max=260417, avg=46657.34, stdev=43093.94 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 55], 10.00th=[ 60], 20.00th=[ 77], | 30.00th=[ 19530], 40.00th=[ 32375], 50.00th=[ 40633], 60.00th=[ 52167], | 70.00th=[ 63177], 80.00th=[ 82314], 90.00th=[101188], 95.00th=[122160], | 99.00th=[196084], 99.50th=[231736], 99.90th=[261096], 99.95th=[261096], | 99.99th=[261096] bw ( KiB/s): min= 30, max= 378, per=25.40%, avg=173.22, stdev=81.15, samples=67 iops : min= 1, max= 23, avg=10.09, stdev= 5.12, samples=67 write: IOPS=11, BW=178KiB/s (183kB/s)(6256KiB/35097msec); 0 zone resets clat (usec): min=1548, max=282478, avg=44160.33, stdev=51816.34 lat (usec): min=1550, max=282480, avg=44180.19, stdev=51814.49 clat percentiles (usec): | 1.00th=[ 1631], 5.00th=[ 1909], 10.00th=[ 2311], 20.00th=[ 5669], | 30.00th=[ 8848], 40.00th=[ 14222], 50.00th=[ 21890], 60.00th=[ 35914], | 70.00th=[ 53740], 80.00th=[ 79168], 90.00th=[113771], 95.00th=[147850], | 99.00th=[233833], 99.50th=[244319], 99.90th=[283116], 99.95th=[283116], | 99.99th=[283116] bw ( KiB/s): min= 27, max= 462, per=24.57%, avg=176.44, stdev=85.30, samples=68 iops : min= 1, max= 28, avg=10.29, stdev= 5.33, samples=68 lat (usec) : 50=1.43%, 100=10.29%, 250=0.39%, 1000=0.26% lat (msec) : 2=4.56%, 4=4.04%, 10=9.77%, 20=8.85%, 50=23.83% lat (msec) : 100=24.61%, 250=11.72%, 500=0.26% cpu : usr=0.07%, sys=4.58%, ctx=1402, 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=682KiB/s (699kB/s), 168KiB/s-187KiB/s (172kB/s-192kB/s), io=23.4MiB (24.5MB), run=31650-35097msec WRITE: bw=718KiB/s (735kB/s), 178KiB/s-201KiB/s (183kB/s-206kB/s), io=24.6MiB (25.8MB), run=31650-35097msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144664: Mon Aug 31 12:47:38 2026 read: IOPS=4, BW=74.7KiB/s (76.5kB/s)(5920KiB/79210msec) clat (msec): min=8, max=384, avg=51.37, stdev=52.73 lat (msec): min=8, max=384, avg=51.38, stdev=52.73 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 28], 50.00th=[ 33], 60.00th=[ 40], | 70.00th=[ 50], 80.00th=[ 66], 90.00th=[ 108], 95.00th=[ 169], | 99.00th=[ 268], 99.50th=[ 300], 99.90th=[ 384], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 30, max= 287, per=27.89%, avg=83.39, stdev=56.45, samples=139 iops : min= 1, max= 17, avg= 4.42, stdev= 3.56, samples=139 write: IOPS=5, BW=80.4KiB/s (82.3kB/s)(6368KiB/79210msec); 0 zone resets clat (msec): min=50, max=504, avg=150.61, stdev=72.50 lat (msec): min=50, max=504, avg=150.62, stdev=72.50 clat percentiles (msec): | 1.00th=[ 59], 5.00th=[ 74], 10.00th=[ 82], 20.00th=[ 95], | 30.00th=[ 106], 40.00th=[ 120], 50.00th=[ 130], 60.00th=[ 144], | 70.00th=[ 163], 80.00th=[ 201], 90.00th=[ 251], 95.00th=[ 313], | 99.00th=[ 405], 99.50th=[ 430], 99.90th=[ 506], 99.95th=[ 506], | 99.99th=[ 506] bw ( KiB/s): min= 30, max= 191, per=26.33%, avg=82.69, stdev=38.30, samples=151 iops : min= 1, max= 11, avg= 4.38, stdev= 2.41, samples=151 lat (msec) : 10=0.52%, 20=9.90%, 50=23.44%, 100=21.22%, 250=38.67% lat (msec) : 500=6.12%, 750=0.13% cpu : usr=0.03%, sys=1.25%, ctx=1353, 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=144665: Mon Aug 31 12:47:38 2026 read: IOPS=4, BW=71.8KiB/s (73.5kB/s)(5744KiB/80030msec) clat (msec): min=7, max=424, avg=46.49, stdev=50.84 lat (msec): min=7, max=424, avg=46.50, stdev=50.83 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 15], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 25], 50.00th=[ 30], 60.00th=[ 36], | 70.00th=[ 46], 80.00th=[ 56], 90.00th=[ 100], 95.00th=[ 144], | 99.00th=[ 275], 99.50th=[ 300], 99.90th=[ 426], 99.95th=[ 426], | 99.99th=[ 426] bw ( KiB/s): min= 28, max= 286, per=29.80%, avg=89.09, stdev=59.98, samples=127 iops : min= 1, max= 17, avg= 4.78, stdev= 3.81, samples=127 write: IOPS=5, BW=81.8KiB/s (83.7kB/s)(6544KiB/80030msec); 0 zone resets clat (msec): min=50, max=607, avg=154.23, stdev=87.04 lat (msec): min=50, max=607, avg=154.24, stdev=87.04 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 70], 10.00th=[ 81], 20.00th=[ 93], | 30.00th=[ 104], 40.00th=[ 113], 50.00th=[ 128], 60.00th=[ 142], | 70.00th=[ 159], 80.00th=[ 201], 90.00th=[ 284], 95.00th=[ 342], | 99.00th=[ 443], 99.50th=[ 468], 99.90th=[ 609], 99.95th=[ 609], | 99.99th=[ 609] bw ( KiB/s): min= 28, max= 190, per=26.62%, avg=83.59, stdev=41.96, samples=154 iops : min= 1, max= 11, avg= 4.42, stdev= 2.65, samples=154 lat (msec) : 10=0.91%, 20=11.98%, 50=22.66%, 100=20.70%, 250=36.46% lat (msec) : 500=7.03%, 750=0.26% cpu : usr=0.03%, sys=1.17%, ctx=1331, 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=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=144666: Mon Aug 31 12:47:38 2026 read: IOPS=5, BW=81.1KiB/s (83.0kB/s)(6256KiB/77151msec) clat (msec): min=8, max=505, avg=44.08, stdev=45.57 lat (msec): min=8, max=505, avg=44.08, stdev=45.57 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 15], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 32], 60.00th=[ 36], | 70.00th=[ 42], 80.00th=[ 57], 90.00th=[ 92], 95.00th=[ 128], | 99.00th=[ 230], 99.50th=[ 296], 99.90th=[ 506], 99.95th=[ 506], | 99.99th=[ 506] bw ( KiB/s): min= 30, max= 345, per=31.70%, avg=94.79, stdev=64.06, samples=130 iops : min= 1, max= 21, avg= 5.15, stdev= 4.05, samples=130 write: IOPS=4, BW=78.2KiB/s (80.1kB/s)(6032KiB/77151msec); 0 zone resets clat (msec): min=55, max=596, avg=158.34, stdev=89.86 lat (msec): min=55, max=596, avg=158.34, stdev=89.86 clat percentiles (msec): | 1.00th=[ 66], 5.00th=[ 75], 10.00th=[ 83], 20.00th=[ 95], | 30.00th=[ 106], 40.00th=[ 118], 50.00th=[ 128], 60.00th=[ 146], | 70.00th=[ 174], 80.00th=[ 197], 90.00th=[ 284], 95.00th=[ 342], | 99.00th=[ 493], 99.50th=[ 600], 99.90th=[ 600], 99.95th=[ 600], | 99.99th=[ 600] bw ( KiB/s): min= 28, max= 191, per=25.62%, avg=80.44, stdev=35.83, samples=147 iops : min= 1, max= 11, avg= 4.23, stdev= 2.28, samples=147 lat (msec) : 10=0.91%, 20=12.76%, 50=25.26%, 100=19.79%, 250=34.11% lat (msec) : 500=6.64%, 750=0.52% cpu : usr=0.04%, sys=1.23%, ctx=1417, 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=144667: Mon Aug 31 12:47:38 2026 read: IOPS=4, BW=77.1KiB/s (78.9kB/s)(6032KiB/78237msec) clat (msec): min=6, max=460, avg=48.72, stdev=53.36 lat (msec): min=6, max=460, avg=48.72, stdev=53.36 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 16], 20.00th=[ 20], | 30.00th=[ 23], 40.00th=[ 28], 50.00th=[ 32], 60.00th=[ 39], | 70.00th=[ 47], 80.00th=[ 62], 90.00th=[ 100], 95.00th=[ 140], | 99.00th=[ 330], 99.50th=[ 393], 99.90th=[ 460], 99.95th=[ 460], | 99.99th=[ 460] bw ( KiB/s): min= 30, max= 319, per=30.02%, avg=89.76, stdev=61.06, samples=131 iops : min= 1, max= 19, avg= 4.85, stdev= 3.83, samples=131 write: IOPS=4, BW=79.0KiB/s (81.9kB/s)(6256KiB/78237msec); 0 zone resets clat (msec): min=51, max=563, avg=152.95, stdev=81.99 lat (msec): min=51, max=563, avg=152.96, stdev=81.99 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 75], 10.00th=[ 85], 20.00th=[ 96], | 30.00th=[ 104], 40.00th=[ 115], 50.00th=[ 127], 60.00th=[ 140], | 70.00th=[ 163], 80.00th=[ 194], 90.00th=[ 266], 95.00th=[ 330], | 99.00th=[ 451], 99.50th=[ 502], 99.90th=[ 567], 99.95th=[ 567], | 99.99th=[ 567] bw ( KiB/s): min= 29, max= 160, per=26.57%, avg=83.43, stdev=37.86, samples=147 iops : min= 1, max= 10, avg= 4.42, stdev= 2.40, samples=147 lat (msec) : 10=1.69%, 20=8.85%, 50=24.74%, 100=22.27%, 250=35.29% lat (msec) : 500=7.03%, 750=0.13% cpu : usr=0.03%, sys=1.29%, ctx=1371, 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=299KiB/s (306kB/s), 71.8KiB/s-81.1KiB/s (73.5kB/s-83.0kB/s), io=23.4MiB (24.5MB), run=77151-80030msec WRITE: bw=315KiB/s (322kB/s), 78.2KiB/s-81.8KiB/s (80.1kB/s-83.7kB/s), io=24.6MiB (25.8MB), run=77151-80030msec 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=144688: Mon Aug 31 12:47:57 2026 read: IOPS=1, BW=1047KiB/s (1072kB/s)(7168KiB/6847msec) clat (usec): min=697, max=2962.6k, avg=799436.26, stdev=1099563.70 lat (usec): min=699, max=2962.6k, avg=799437.59, stdev=1099564.09 clat percentiles (usec): | 1.00th=[ 701], 5.00th=[ 701], 10.00th=[ 701], | 20.00th=[ 173016], 30.00th=[ 221250], 40.00th=[ 221250], | 50.00th=[ 270533], 60.00th=[ 329253], 70.00th=[ 329253], | 80.00th=[1635779], 90.00th=[2969568], 95.00th=[2969568], | 99.00th=[2969568], 99.50th=[2969568], 99.90th=[2969568], | 99.95th=[2969568], 99.99th=[2969568] bw ( KiB/s): min= 1969, max= 3968, per=100.00%, avg=2407.60, stdev=872.81, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 write: IOPS=0, BW=748KiB/s (766kB/s)(5120KiB/6847msec); 0 zone resets clat (msec): min=118, max=346, avg=225.26, stdev=89.52 lat (msec): min=119, max=346, avg=225.38, stdev=89.42 clat percentiles (msec): | 1.00th=[ 120], 5.00th=[ 120], 10.00th=[ 120], 20.00th=[ 120], | 30.00th=[ 182], 40.00th=[ 182], 50.00th=[ 199], 60.00th=[ 199], | 70.00th=[ 284], 80.00th=[ 284], 90.00th=[ 347], 95.00th=[ 347], | 99.00th=[ 347], 99.50th=[ 347], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 1835, max= 5907, per=100.00%, avg=3261.67, stdev=2293.29, samples=3 iops : min= 1, max= 5, avg= 2.33, stdev= 2.31, samples=3 lat (usec) : 750=8.33% lat (msec) : 250=41.67%, 500=33.33%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.84%, ctx=945, 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=144691: Mon Aug 31 12:47:57 2026 read: IOPS=0, BW=232KiB/s (237kB/s)(2048KiB/8844msec) clat (msec): min=154, max=324, avg=239.52, stdev=120.62 lat (msec): min=154, max=324, avg=239.52, stdev=120.62 clat percentiles (msec): | 1.00th=[ 155], 5.00th=[ 155], 10.00th=[ 155], 20.00th=[ 155], | 30.00th=[ 155], 40.00th=[ 155], 50.00th=[ 155], 60.00th=[ 326], | 70.00th=[ 326], 80.00th=[ 326], 90.00th=[ 326], 95.00th=[ 326], | 99.00th=[ 326], 99.50th=[ 326], 99.90th=[ 326], 99.95th=[ 326], | 99.99th=[ 326] bw ( KiB/s): min= 1528, max= 2048, per=77.24%, avg=1788.00, stdev=367.70, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 write: IOPS=1, BW=1158KiB/s (1186kB/s)(10.0MiB/8844msec); 0 zone resets clat (msec): min=128, max=4773, avg=807.67, stdev=1424.67 lat (msec): min=128, max=4773, avg=807.77, stdev=1424.67 clat percentiles (msec): | 1.00th=[ 129], 5.00th=[ 129], 10.00th=[ 129], 20.00th=[ 171], | 30.00th=[ 180], 40.00th=[ 190], 50.00th=[ 266], 60.00th=[ 275], | 70.00th=[ 305], 80.00th=[ 743], 90.00th=[ 1053], 95.00th=[ 4799], | 99.00th=[ 4799], 99.50th=[ 4799], 99.90th=[ 4799], 99.95th=[ 4799], | 99.99th=[ 4799] bw ( KiB/s): min= 1835, max= 4096, per=100.00%, avg=3616.40, stdev=997.31, samples=5 iops : min= 1, max= 4, avg= 3.00, stdev= 1.22, samples=5 lat (msec) : 250=41.67%, 500=33.33%, 750=8.33%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=6.10%, ctx=175, 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=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=144693: Mon Aug 31 12:47:57 2026 read: IOPS=0, BW=840KiB/s (861kB/s)(6144KiB/7310msec) clat (usec): min=1165, max=393673, avg=154123.61, stdev=151972.86 lat (usec): min=1166, max=393674, avg=154124.81, stdev=151972.91 clat percentiles (usec): | 1.00th=[ 1172], 5.00th=[ 1172], 10.00th=[ 1172], 20.00th=[ 41157], | 30.00th=[ 41157], 40.00th=[ 59507], 50.00th=[ 59507], 60.00th=[160433], | 70.00th=[267387], 80.00th=[267387], 90.00th=[392168], 95.00th=[392168], | 99.00th=[392168], 99.50th=[392168], 99.90th=[392168], 99.95th=[392168], | 99.99th=[392168] bw ( KiB/s): min= 1969, max= 3670, per=100.00%, avg=2541.00, stdev=977.77, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=0, BW=840KiB/s (861kB/s)(6144KiB/7310msec); 0 zone resets clat (msec): min=131, max=4782, avg=1052.92, stdev=1829.48 lat (msec): min=131, max=4782, avg=1052.98, stdev=1829.47 clat percentiles (msec): | 1.00th=[ 132], 5.00th=[ 132], 10.00th=[ 132], 20.00th=[ 309], | 30.00th=[ 309], 40.00th=[ 338], 50.00th=[ 338], 60.00th=[ 342], | 70.00th=[ 418], 80.00th=[ 418], 90.00th=[ 4799], 95.00th=[ 4799], | 99.00th=[ 4799], 99.50th=[ 4799], 99.90th=[ 4799], 99.95th=[ 4799], | 99.99th=[ 4799] bw ( KiB/s): min= 1436, max= 2043, per=56.29%, avg=1824.50, stdev=273.39, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 2=8.33%, 50=8.33%, 100=8.33%, 250=16.67%, 500=50.00% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=4.94%, ctx=127, 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=144694: Mon Aug 31 12:47:57 2026 read: IOPS=0, BW=695KiB/s (712kB/s)(5120KiB/7363msec) clat (usec): min=344, max=75171, avg=15405.34, stdev=33410.56 lat (usec): min=345, max=75172, avg=15406.31, stdev=33410.66 clat percentiles (usec): | 1.00th=[ 347], 5.00th=[ 347], 10.00th=[ 347], 20.00th=[ 347], | 30.00th=[ 355], 40.00th=[ 355], 50.00th=[ 461], 60.00th=[ 461], | 70.00th=[ 693], 80.00th=[ 693], 90.00th=[74974], 95.00th=[74974], | 99.00th=[74974], 99.50th=[74974], 99.90th=[74974], 99.95th=[74974], | 99.99th=[74974] bw ( KiB/s): min= 7742, max= 7742, per=100.00%, avg=7742.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=0, BW=974KiB/s (997kB/s)(7168KiB/7363msec); 0 zone resets clat (msec): min=122, max=4898, avg=1009.67, stdev=1728.13 lat (msec): min=122, max=4898, avg=1009.75, stdev=1728.13 clat percentiles (msec): | 1.00th=[ 123], 5.00th=[ 123], 10.00th=[ 123], 20.00th=[ 138], | 30.00th=[ 275], 40.00th=[ 275], 50.00th=[ 363], 60.00th=[ 592], | 70.00th=[ 592], 80.00th=[ 684], 90.00th=[ 4866], 95.00th=[ 4866], | 99.00th=[ 4866], 99.50th=[ 4866], 99.90th=[ 4866], 99.95th=[ 4866], | 99.99th=[ 4866] bw ( KiB/s): min= 1969, max= 3871, per=89.12%, avg=2888.25, stdev=1022.48, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 lat (usec) : 500=25.00%, 750=8.33% lat (msec) : 100=8.33%, 250=16.67%, 500=16.67%, 750=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=4.40%, ctx=93, 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=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=2316KiB/s (2371kB/s), 232KiB/s-1047KiB/s (237kB/s-1072kB/s), io=20.0MiB (20.0MB), run=6847-8844msec WRITE: bw=3242KiB/s (3320kB/s), 748KiB/s-1158KiB/s (766kB/s-1186kB/s), io=28.0MiB (29.4MB), run=6847-8844msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144687: Mon Aug 31 12:47:57 2026 read: IOPS=0, BW=783KiB/s (802kB/s)(7168KiB/9153msec) clat (msec): min=71, max=3024, avg=951.88, stdev=1397.76 lat (msec): min=71, max=3024, avg=951.88, stdev=1397.76 clat percentiles (msec): | 1.00th=[ 72], 5.00th=[ 72], 10.00th=[ 72], 20.00th=[ 87], | 30.00th=[ 91], 40.00th=[ 91], 50.00th=[ 211], 60.00th=[ 211], | 70.00th=[ 211], 80.00th=[ 2970], 90.00th=[ 3037], 95.00th=[ 3037], | 99.00th=[ 3037], 99.50th=[ 3037], 99.90th=[ 3037], 99.95th=[ 3037], | 99.99th=[ 3037] bw ( KiB/s): min= 1973, max= 4071, per=100.00%, avg=2531.75, stdev=1026.69, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=559KiB/s (573kB/s)(5120KiB/9153msec); 0 zone resets clat (msec): min=158, max=979, avg=466.28, stdev=308.50 lat (msec): min=158, max=980, avg=466.36, stdev=308.50 clat percentiles (msec): | 1.00th=[ 159], 5.00th=[ 159], 10.00th=[ 159], 20.00th=[ 159], | 30.00th=[ 326], 40.00th=[ 326], 50.00th=[ 430], 60.00th=[ 430], | 70.00th=[ 439], 80.00th=[ 439], 90.00th=[ 978], 95.00th=[ 978], | 99.00th=[ 978], 99.50th=[ 978], 99.90th=[ 978], 99.95th=[ 978], | 99.99th=[ 978] bw ( KiB/s): min= 2027, max= 2048, per=65.03%, avg=2036.67, stdev=10.60, samples=3 iops : min= 1, max= 2, avg= 1.33, stdev= 0.58, samples=3 lat (msec) : 100=25.00%, 250=25.00%, 500=25.00%, 1000=8.33%, >=2000=16.67% cpu : usr=0.00%, sys=1.64%, ctx=61, 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=144689: Mon Aug 31 12:47:57 2026 read: IOPS=0, BW=235KiB/s (241kB/s)(2048KiB/8707msec) clat (msec): min=138, max=561, avg=350.19, stdev=299.30 lat (msec): min=138, max=561, avg=350.19, stdev=299.30 clat percentiles (msec): | 1.00th=[ 140], 5.00th=[ 140], 10.00th=[ 140], 20.00th=[ 140], | 30.00th=[ 140], 40.00th=[ 140], 50.00th=[ 140], 60.00th=[ 558], | 70.00th=[ 558], 80.00th=[ 558], 90.00th=[ 558], 95.00th=[ 558], | 99.00th=[ 558], 99.50th=[ 558], 99.90th=[ 558], 99.95th=[ 558], | 99.99th=[ 558] bw ( KiB/s): min= 1363, max= 1961, per=74.30%, avg=1662.00, stdev=422.85, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1176KiB/s (1204kB/s)(10.0MiB/8707msec); 0 zone resets clat (msec): min=221, max=4883, avg=785.75, stdev=1441.50 lat (msec): min=222, max=4883, avg=785.83, stdev=1441.50 clat percentiles (msec): | 1.00th=[ 222], 5.00th=[ 222], 10.00th=[ 222], 20.00th=[ 264], | 30.00th=[ 292], 40.00th=[ 305], 50.00th=[ 305], 60.00th=[ 351], | 70.00th=[ 372], 80.00th=[ 430], 90.00th=[ 435], 95.00th=[ 4866], | 99.00th=[ 4866], 99.50th=[ 4866], 99.90th=[ 4866], 99.95th=[ 4866], | 99.99th=[ 4866] bw ( KiB/s): min= 1973, max= 4096, per=86.69%, avg=2715.17, stdev=1069.93, samples=6 iops : min= 1, max= 4, avg= 2.17, stdev= 1.47, samples=6 lat (msec) : 250=16.67%, 500=66.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=1.57%, ctx=49, 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=144690: Mon Aug 31 12:47:57 2026 read: IOPS=0, BW=695KiB/s (712kB/s)(6144KiB/8835msec) clat (msec): min=103, max=1185, avg=369.30, stdev=414.70 lat (msec): min=103, max=1185, avg=369.30, stdev=414.70 clat percentiles (msec): | 1.00th=[ 104], 5.00th=[ 104], 10.00th=[ 104], 20.00th=[ 117], | 30.00th=[ 117], 40.00th=[ 182], 50.00th=[ 182], 60.00th=[ 218], | 70.00th=[ 409], 80.00th=[ 409], 90.00th=[ 1183], 95.00th=[ 1183], | 99.00th=[ 1183], 99.50th=[ 1183], 99.90th=[ 1183], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 1961, max= 4087, per=100.00%, avg=2532.75, stdev=1036.87, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=695KiB/s (712kB/s)(6144KiB/8835msec); 0 zone resets clat (msec): min=208, max=4390, avg=1095.05, stdev=1620.17 lat (msec): min=209, max=4390, avg=1095.14, stdev=1620.18 clat percentiles (msec): | 1.00th=[ 209], 5.00th=[ 209], 10.00th=[ 209], 20.00th=[ 414], | 30.00th=[ 414], 40.00th=[ 426], 50.00th=[ 426], 60.00th=[ 518], | 70.00th=[ 617], 80.00th=[ 617], 90.00th=[ 4396], 95.00th=[ 4396], | 99.00th=[ 4396], 99.50th=[ 4396], 99.90th=[ 4396], 99.95th=[ 4396], | 99.99th=[ 4396] bw ( KiB/s): min= 2027, max= 2752, per=69.75%, avg=2184.60, stdev=317.32, samples=5 iops : min= 1, max= 2, avg= 1.80, stdev= 0.45, samples=5 lat (msec) : 250=41.67%, 500=25.00%, 750=16.67%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.12%, ctx=66, 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=144692: Mon Aug 31 12:47:57 2026 read: IOPS=0, BW=588KiB/s (602kB/s)(5120KiB/8711msec) clat (msec): min=100, max=859, avg=282.03, stdev=324.76 lat (msec): min=100, max=859, avg=282.03, stdev=324.76 clat percentiles (msec): | 1.00th=[ 101], 5.00th=[ 101], 10.00th=[ 101], 20.00th=[ 101], | 30.00th=[ 109], 40.00th=[ 109], 50.00th=[ 153], 60.00th=[ 153], | 70.00th=[ 190], 80.00th=[ 190], 90.00th=[ 860], 95.00th=[ 860], | 99.00th=[ 860], 99.50th=[ 860], 99.90th=[ 860], 99.95th=[ 860], | 99.99th=[ 860] bw ( KiB/s): min= 2048, max= 6107, per=100.00%, avg=4077.50, stdev=2870.15, samples=2 iops : min= 2, max= 5, avg= 3.50, stdev= 2.12, samples=2 write: IOPS=0, BW=823KiB/s (843kB/s)(7168KiB/8711msec); 0 zone resets clat (msec): min=163, max=4522, avg=1013.78, stdev=1563.83 lat (msec): min=163, max=4522, avg=1013.87, stdev=1563.82 clat percentiles (msec): | 1.00th=[ 165], 5.00th=[ 165], 10.00th=[ 165], 20.00th=[ 271], | 30.00th=[ 288], 40.00th=[ 288], 50.00th=[ 422], 60.00th=[ 584], | 70.00th=[ 584], 80.00th=[ 844], 90.00th=[ 4530], 95.00th=[ 4530], | 99.00th=[ 4530], 99.50th=[ 4530], 99.90th=[ 4530], 99.95th=[ 4530], | 99.99th=[ 4530] bw ( KiB/s): min= 1973, max= 4087, per=80.93%, avg=2534.75, stdev=1035.33, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 lat (msec) : 250=41.67%, 500=25.00%, 750=8.33%, 1000=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=2.03%, ctx=82, 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=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=2238KiB/s (2291kB/s), 235KiB/s-783KiB/s (241kB/s-802kB/s), io=20.0MiB (20.0MB), run=8707-9153msec WRITE: bw=3133KiB/s (3208kB/s), 559KiB/s-1176KiB/s (573kB/s-1204kB/s), io=28.0MiB (29.4MB), run=8707-9153msec 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=144705: Mon Aug 31 12:48:12 2026 read: IOPS=1, BW=4112KiB/s (4211kB/s)(12.0MiB/2988msec) clat (msec): min=883, max=1048, avg=967.99, stdev=82.51 lat (msec): min=883, max=1048, avg=967.99, stdev=82.51 clat percentiles (msec): | 1.00th=[ 885], 5.00th=[ 885], 10.00th=[ 885], 20.00th=[ 885], | 30.00th=[ 885], 40.00th=[ 969], 50.00th=[ 969], 60.00th=[ 969], | 70.00th=[ 1045], 80.00th=[ 1045], 90.00th=[ 1045], 95.00th=[ 1045], | 99.00th=[ 1045], 99.50th=[ 1045], 99.90th=[ 1045], 99.95th=[ 1045], | 99.99th=[ 1045] bw ( KiB/s): min= 8062, max= 8110, per=100.00%, avg=8086.00, stdev=33.94, 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=11.95%, ctx=243, 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=144707: Mon Aug 31 12:48:12 2026 read: IOPS=0, BW=1236KiB/s (1266kB/s)(4096KiB/3314msec) clat (nsec): min=820618k, max=820618k, avg=820617735.00, stdev= 0.00 lat (nsec): min=820620k, max=820620k, avg=820619955.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 818], 5.00th=[ 818], 10.00th=[ 818], 20.00th=[ 818], | 30.00th=[ 818], 40.00th=[ 818], 50.00th=[ 818], 60.00th=[ 818], | 70.00th=[ 818], 80.00th=[ 818], 90.00th=[ 818], 95.00th=[ 818], | 99.00th=[ 818], 99.50th=[ 818], 99.90th=[ 818], 99.95th=[ 818], | 99.99th=[ 818] bw ( KiB/s): min= 8110, max= 8110, per=100.00%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2472KiB/s (2531kB/s)(8192KiB/3314msec); 0 zone resets clat (msec): min=615, max=1599, avg=1107.20, stdev=695.87 lat (msec): min=616, max=1599, avg=1107.97, stdev=695.23 clat percentiles (msec): | 1.00th=[ 617], 5.00th=[ 617], 10.00th=[ 617], 20.00th=[ 617], | 30.00th=[ 617], 40.00th=[ 617], 50.00th=[ 617], 60.00th=[ 1603], | 70.00th=[ 1603], 80.00th=[ 1603], 90.00th=[ 1603], 95.00th=[ 1603], | 99.00th=[ 1603], 99.50th=[ 1603], 99.90th=[ 1603], 99.95th=[ 1603], | 99.99th=[ 1603] bw ( KiB/s): min= 8062, max= 8062, per=94.90%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.06%, sys=4.07%, ctx=89, 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=144709: Mon Aug 31 12:48:12 2026 write: IOPS=0, BW=3186KiB/s (3262kB/s)(12.0MiB/3857msec); 0 zone resets clat (msec): min=275, max=1830, avg=1211.53, stdev=824.10 lat (msec): min=276, max=1830, avg=1212.35, stdev=824.33 clat percentiles (msec): | 1.00th=[ 275], 5.00th=[ 275], 10.00th=[ 275], 20.00th=[ 275], | 30.00th=[ 275], 40.00th=[ 1536], 50.00th=[ 1536], 60.00th=[ 1536], | 70.00th=[ 1838], 80.00th=[ 1838], 90.00th=[ 1838], 95.00th=[ 1838], | 99.00th=[ 1838], 99.50th=[ 1838], 99.90th=[ 1838], 99.95th=[ 1838], | 99.99th=[ 1838] bw ( KiB/s): min= 8062, max= 8143, per=95.38%, avg=8102.50, stdev=57.28, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.23%, ctx=38, 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 rand-rw: (groupid=0, jobs=1): err= 0: pid=144710: Mon Aug 31 12:48:12 2026 write: IOPS=1, BW=4165KiB/s (4265kB/s)(12.0MiB/2950msec); 0 zone resets clat (msec): min=567, max=1393, avg=913.09, stdev=429.12 lat (msec): min=567, max=1393, avg=913.46, stdev=429.14 clat percentiles (msec): | 1.00th=[ 567], 5.00th=[ 567], 10.00th=[ 567], 20.00th=[ 567], | 30.00th=[ 567], 40.00th=[ 776], 50.00th=[ 776], 60.00th=[ 776], | 70.00th=[ 1401], 80.00th=[ 1401], 90.00th=[ 1401], 95.00th=[ 1401], | 99.00th=[ 1401], 99.50th=[ 1401], 99.90th=[ 1401], 99.95th=[ 1401], | 99.99th=[ 1401] bw ( KiB/s): min= 8110, max= 8110, per=95.47%, avg=8110.00, stdev= 0.00, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.75%, ctx=65, 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=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=4944KiB/s (5063kB/s), 1236KiB/s-4112KiB/s (1266kB/s-4211kB/s), io=16.0MiB (16.8MB), run=2988-3314msec WRITE: bw=8496KiB/s (8700kB/s), 2472KiB/s-4165KiB/s (2531kB/s-4265kB/s), io=32.0MiB (33.6MB), run=2950-3857msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144703: Mon Aug 31 12:48:12 2026 read: IOPS=2, BW=8641KiB/s (8849kB/s)(12.0MiB/1422msec) clat (msec): min=234, max=620, avg=431.20, stdev=193.36 lat (msec): min=234, max=620, avg=431.20, stdev=193.36 clat percentiles (msec): | 1.00th=[ 234], 5.00th=[ 234], 10.00th=[ 234], 20.00th=[ 234], | 30.00th=[ 234], 40.00th=[ 439], 50.00th=[ 439], 60.00th=[ 439], | 70.00th=[ 617], 80.00th=[ 617], 90.00th=[ 617], 95.00th=[ 617], | 99.00th=[ 617], 99.50th=[ 617], 99.90th=[ 617], 99.95th=[ 617], | 99.99th=[ 617] bw ( KiB/s): min= 5720, max= 8159, per=100.00%, avg=6939.50, stdev=1724.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 500=33.33%, 750=33.33% cpu : usr=0.07%, sys=9.22%, ctx=80, 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=144704: Mon Aug 31 12:48:12 2026 read: IOPS=0, BW=1045KiB/s (1070kB/s)(4096KiB/3919msec) clat (nsec): min=1676.9M, max=1676.9M, avg=1676899500.00, stdev= 0.00 lat (nsec): min=1676.9M, max=1676.9M, avg=1676901081.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1670], 5.00th=[ 1670], 10.00th=[ 1670], 20.00th=[ 1670], | 30.00th=[ 1670], 40.00th=[ 1670], 50.00th=[ 1670], 60.00th=[ 1670], | 70.00th=[ 1670], 80.00th=[ 1670], 90.00th=[ 1670], 95.00th=[ 1670], | 99.00th=[ 1670], 99.50th=[ 1670], 99.90th=[ 1670], 99.95th=[ 1670], | 99.99th=[ 1670] bw ( KiB/s): min= 7861, max= 7861, per=100.00%, avg=7861.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2090KiB/s (2140kB/s)(8192KiB/3919msec); 0 zone resets clat (msec): min=405, max=1773, avg=1089.61, stdev=967.11 lat (msec): min=408, max=1774, avg=1091.58, stdev=966.36 clat percentiles (msec): | 1.00th=[ 405], 5.00th=[ 405], 10.00th=[ 405], 20.00th=[ 405], | 30.00th=[ 405], 40.00th=[ 405], 50.00th=[ 405], 60.00th=[ 1770], | 70.00th=[ 1770], 80.00th=[ 1770], 90.00th=[ 1770], 95.00th=[ 1770], | 99.00th=[ 1770], 99.50th=[ 1770], 99.90th=[ 1770], 99.95th=[ 1770], | 99.99th=[ 1770] bw ( KiB/s): min= 7861, max= 7861, per=94.02%, avg=7861.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.30%, ctx=34, 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=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=144706: Mon Aug 31 12:48:12 2026 write: IOPS=0, BW=3570KiB/s (3656kB/s)(12.0MiB/3442msec); 0 zone resets clat (msec): min=563, max=1418, avg=1106.36, stdev=471.49 lat (msec): min=564, max=1419, avg=1106.76, stdev=471.70 clat percentiles (msec): | 1.00th=[ 567], 5.00th=[ 567], 10.00th=[ 567], 20.00th=[ 567], | 30.00th=[ 567], 40.00th=[ 1334], 50.00th=[ 1334], 60.00th=[ 1334], | 70.00th=[ 1418], 80.00th=[ 1418], 90.00th=[ 1418], 95.00th=[ 1418], | 99.00th=[ 1418], 99.50th=[ 1418], 99.90th=[ 1418], 99.95th=[ 1418], | 99.99th=[ 1418] bw ( KiB/s): min= 8031, max= 8192, per=97.02%, avg=8111.50, stdev=113.84, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=5.41%, ctx=58, 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 rand-rw: (groupid=0, jobs=1): err= 0: pid=144708: Mon Aug 31 12:48:12 2026 write: IOPS=1, BW=4457KiB/s (4564kB/s)(12.0MiB/2757msec); 0 zone resets clat (msec): min=403, max=1384, avg=857.98, stdev=494.30 lat (msec): min=405, max=1384, avg=859.11, stdev=493.21 clat percentiles (msec): | 1.00th=[ 405], 5.00th=[ 405], 10.00th=[ 405], 20.00th=[ 405], | 30.00th=[ 405], 40.00th=[ 785], 50.00th=[ 785], 60.00th=[ 785], | 70.00th=[ 1385], 80.00th=[ 1385], 90.00th=[ 1385], 95.00th=[ 1385], | 99.00th=[ 1385], 99.50th=[ 1385], 99.90th=[ 1385], 99.95th=[ 1385], | 99.99th=[ 1385] bw ( KiB/s): min= 5520, max= 8031, per=81.04%, avg=6775.50, stdev=1775.55, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.25%, ctx=49, 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=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=4181KiB/s (4281kB/s), 1045KiB/s-8641KiB/s (1070kB/s-8849kB/s), io=16.0MiB (16.8MB), run=1422-3919msec WRITE: bw=8361KiB/s (8562kB/s), 2090KiB/s-4457KiB/s (2140kB/s-4564kB/s), io=32.0MiB (33.6MB), run=2757-3919msec