== sanity test 398b: DIO and buffer IO race ============== 23:45:37 (1788839137) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.61658 s, 9.0 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=144535: Mon Sep 7 23:48:21 2026 read: IOPS=10, BW=41.2KiB/s (42.2kB/s)(5992KiB/145546msec) clat (usec): min=34, max=547837, avg=46983.72, stdev=36830.89 lat (usec): min=34, max=547839, avg=46988.40, stdev=36831.01 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 69], 10.00th=[ 9634], 20.00th=[ 20579], | 30.00th=[ 27395], 40.00th=[ 33817], 50.00th=[ 39584], 60.00th=[ 46924], | 70.00th=[ 56361], 80.00th=[ 69731], 90.00th=[ 90702], 95.00th=[111674], | 99.00th=[160433], 99.50th=[183501], 99.90th=[270533], 99.95th=[549454], | 99.99th=[549454] bw ( KiB/s): min= 7, max= 111, per=25.20%, avg=41.32, stdev=19.38, samples=282 iops : min= 1, max= 27, avg= 9.68, stdev= 4.90, samples=282 write: IOPS=10, BW=43.3KiB/s (44.3kB/s)(6296KiB/145546msec); 0 zone resets clat (usec): min=865, max=1057.9k, avg=47466.35, stdev=53756.81 lat (usec): min=867, max=1057.9k, avg=47469.57, stdev=53756.69 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1287], 10.00th=[ 1893], | 20.00th=[ 5080], 30.00th=[ 10683], 40.00th=[ 22152], | 50.00th=[ 34866], 60.00th=[ 46400], 70.00th=[ 61080], | 80.00th=[ 81265], 90.00th=[ 109577], 95.00th=[ 141558], | 99.00th=[ 200279], 99.50th=[ 233833], 99.90th=[ 337642], | 99.95th=[1061159], 99.99th=[1061159] bw ( KiB/s): min= 7, max= 125, per=25.07%, avg=43.12, stdev=19.99, samples=284 iops : min= 1, max= 31, avg=10.13, stdev= 5.04, samples=284 lat (usec) : 50=0.36%, 100=3.58%, 250=0.23%, 500=0.16%, 750=0.10% lat (usec) : 1000=0.10% lat (msec) : 2=5.34%, 4=3.45%, 10=6.51%, 20=9.11%, 50=33.82% lat (msec) : 100=27.54%, 250=9.47%, 500=0.16%, 750=0.03%, 2000=0.03% cpu : usr=0.09%, sys=4.97%, ctx=6551, 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=144536: Mon Sep 7 23:48:21 2026 read: IOPS=10, BW=41.3KiB/s (42.3kB/s)(5940KiB/143653msec) clat (usec): min=39, max=544638, avg=46899.30, stdev=36683.27 lat (usec): min=39, max=544640, avg=46900.55, stdev=36683.26 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 71], 10.00th=[ 10028], 20.00th=[ 20579], | 30.00th=[ 27132], 40.00th=[ 34341], 50.00th=[ 40633], 60.00th=[ 47973], | 70.00th=[ 56886], 80.00th=[ 68682], 90.00th=[ 87557], 95.00th=[110625], | 99.00th=[173016], 99.50th=[196084], 99.90th=[283116], 99.95th=[541066], | 99.99th=[541066] bw ( KiB/s): min= 7, max= 96, per=25.23%, avg=41.38, stdev=18.26, samples=279 iops : min= 1, max= 24, avg= 9.68, stdev= 4.61, samples=279 write: IOPS=11, BW=44.2KiB/s (45.2kB/s)(6348KiB/143653msec); 0 zone resets clat (usec): min=977, max=1122.8k, avg=46343.27, stdev=55950.22 lat (usec): min=978, max=1122.8k, avg=46347.47, stdev=55951.52 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1254], 10.00th=[ 1565], | 20.00th=[ 4752], 30.00th=[ 11076], 40.00th=[ 22414], | 50.00th=[ 31851], 60.00th=[ 44827], 70.00th=[ 57934], | 80.00th=[ 78119], 90.00th=[ 108528], 95.00th=[ 135267], | 99.00th=[ 212861], 99.50th=[ 278922], 99.90th=[ 476054], | 99.95th=[1115685], 99.99th=[1115685] bw ( KiB/s): min= 7, max= 126, per=25.77%, avg=44.32, stdev=21.57, samples=279 iops : min= 1, max= 31, avg=10.42, stdev= 5.43, samples=279 lat (usec) : 50=0.33%, 100=3.55%, 250=0.46%, 500=0.10%, 750=0.07% lat (usec) : 1000=0.10% lat (msec) : 2=6.35%, 4=2.99%, 10=5.76%, 20=8.79%, 50=34.86% lat (msec) : 100=27.34%, 250=8.89%, 500=0.36%, 750=0.03%, 2000=0.03% cpu : usr=0.09%, sys=5.11%, ctx=6467, 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=144537: Mon Sep 7 23:48:21 2026 read: IOPS=10, BW=41.6KiB/s (42.6kB/s)(6028KiB/145030msec) clat (usec): min=31, max=289068, avg=44718.84, stdev=35548.69 lat (usec): min=32, max=289069, avg=44728.70, stdev=35546.33 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 69], 10.00th=[ 277], 20.00th=[ 19006], | 30.00th=[ 24773], 40.00th=[ 30016], 50.00th=[ 36963], 60.00th=[ 44827], | 70.00th=[ 54264], 80.00th=[ 67634], 90.00th=[ 89654], 95.00th=[109577], | 99.00th=[162530], 99.50th=[198181], 99.90th=[274727], 99.95th=[287310], | 99.99th=[287310] bw ( KiB/s): min= 7, max= 119, per=25.27%, avg=41.44, stdev=22.31, samples=283 iops : min= 1, max= 29, avg= 9.70, stdev= 5.63, samples=283 write: IOPS=10, BW=43.2KiB/s (44.2kB/s)(6260KiB/145030msec); 0 zone resets clat (usec): min=664, max=1017.0k, avg=49274.12, stdev=59493.43 lat (usec): min=665, max=1017.0k, avg=49275.95, stdev=59494.13 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1303], 10.00th=[ 1647], | 20.00th=[ 4490], 30.00th=[ 9503], 40.00th=[ 21627], | 50.00th=[ 35390], 60.00th=[ 47449], 70.00th=[ 62129], | 80.00th=[ 81265], 90.00th=[ 114820], 95.00th=[ 145753], | 99.00th=[ 244319], 99.50th=[ 316670], 99.90th=[ 549454], | 99.95th=[1019216], 99.99th=[1019216] bw ( KiB/s): min= 7, max= 119, per=24.95%, avg=42.92, stdev=21.15, samples=284 iops : min= 1, max= 29, avg=10.07, stdev= 5.33, samples=284 lat (usec) : 50=0.65%, 100=3.78%, 250=0.46%, 500=0.07%, 750=0.07% lat (usec) : 1000=0.20% lat (msec) : 2=6.09%, 4=3.58%, 10=6.22%, 20=9.21%, 50=33.17% lat (msec) : 100=25.78%, 250=10.19%, 500=0.49%, 750=0.03%, 2000=0.03% cpu : usr=0.07%, sys=4.93%, ctx=6507, 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=144538: Mon Sep 7 23:48:21 2026 read: IOPS=10, BW=41.7KiB/s (42.7kB/s)(6052KiB/145114msec) clat (usec): min=31, max=1062.3k, avg=46352.28, stdev=46970.27 lat (usec): min=31, max=1062.3k, avg=46355.57, stdev=46969.98 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 64], 10.00th=[ 155], | 20.00th=[ 19792], 30.00th=[ 26346], 40.00th=[ 31327], | 50.00th=[ 36963], 60.00th=[ 44827], 70.00th=[ 56361], | 80.00th=[ 68682], 90.00th=[ 88605], 95.00th=[ 105382], | 99.00th=[ 185598], 99.50th=[ 238027], 99.90th=[ 574620], | 99.95th=[1061159], 99.99th=[1061159] bw ( KiB/s): min= 7, max= 112, per=25.90%, avg=42.47, stdev=20.12, samples=277 iops : min= 1, max= 28, avg= 9.96, stdev= 5.08, samples=277 write: IOPS=10, BW=42.0KiB/s (44.0kB/s)(6236KiB/145114msec); 0 zone resets clat (usec): min=810, max=433131, avg=47751.50, stdev=50766.72 lat (usec): min=811, max=433133, avg=47754.42, stdev=50766.55 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1270], 10.00th=[ 1483], 20.00th=[ 4359], | 30.00th=[ 10028], 40.00th=[ 21103], 50.00th=[ 32900], 60.00th=[ 47449], | 70.00th=[ 62653], 80.00th=[ 82314], 90.00th=[115868], 95.00th=[145753], | 99.00th=[217056], 99.50th=[238027], 99.90th=[358613], 99.95th=[434111], | 99.99th=[434111] bw ( KiB/s): min= 7, max= 111, per=24.96%, avg=42.94, stdev=19.74, samples=282 iops : min= 1, max= 27, avg=10.09, stdev= 4.98, samples=282 lat (usec) : 50=0.65%, 100=3.87%, 250=0.49%, 500=0.07%, 1000=0.20% lat (msec) : 2=6.35%, 4=3.29%, 10=5.99%, 20=8.79%, 50=34.21% lat (msec) : 100=25.78%, 250=9.90%, 500=0.36%, 750=0.03%, 2000=0.03% cpu : usr=0.07%, sys=4.86%, ctx=6426, 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=165KiB/s (169kB/s), 41.2KiB/s-41.7KiB/s (42.2kB/s-42.7kB/s), io=23.4MiB (24.6MB), run=143653-145546msec WRITE: bw=173KiB/s (177kB/s), 42.0KiB/s-44.2KiB/s (44.0kB/s-45.2kB/s), io=24.6MiB (25.7MB), run=143653-145546msec fio: pid=144534, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=144531: Mon Sep 7 23:50:27 2026 read: IOPS=5, BW=22.2KiB/s (22.7kB/s)(5992KiB/269810msec) clat (msec): min=3, max=1189, avg=35.45, stdev=50.26 lat (msec): min=3, max=1189, avg=35.46, stdev=50.26 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 8], 10.00th=[ 9], 20.00th=[ 12], | 30.00th=[ 14], 40.00th=[ 17], 50.00th=[ 20], 60.00th=[ 25], | 70.00th=[ 34], 80.00th=[ 50], 90.00th=[ 85], 95.00th=[ 112], | 99.00th=[ 186], 99.50th=[ 249], 99.90th=[ 584], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 7, max= 104, per=34.04%, avg=25.87, stdev=18.38, samples=448 iops : min= 1, max= 26, avg= 5.83, stdev= 4.63, samples=448 write: IOPS=5, BW=23.3KiB/s (23.9kB/s)(6296KiB/269810msec); 0 zone resets clat (msec): min=26, max=680, avg=137.37, stdev=77.10 lat (msec): min=26, max=680, avg=137.37, stdev=77.10 clat percentiles (msec): | 1.00th=[ 40], 5.00th=[ 53], 10.00th=[ 61], 20.00th=[ 74], | 30.00th=[ 86], 40.00th=[ 101], 50.00th=[ 117], 60.00th=[ 140], | 70.00th=[ 161], 80.00th=[ 197], 90.00th=[ 241], 95.00th=[ 288], | 99.00th=[ 380], 99.50th=[ 409], 99.90th=[ 575], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 7, max= 72, per=28.99%, avg=23.19, stdev=12.87, samples=523 iops : min= 1, max= 18, avg= 5.15, stdev= 3.28, samples=523 lat (msec) : 4=0.03%, 10=6.61%, 20=18.29%, 50=16.31%, 100=24.61% lat (msec) : 250=29.26%, 500=4.65%, 750=0.20%, 2000=0.03% cpu : usr=0.04%, sys=1.06%, ctx=5359, 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=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=144532: Mon Sep 7 23:50:27 2026 read: IOPS=5, BW=21.9KiB/s (22.4kB/s)(5940KiB/271683msec) clat (msec): min=4, max=1097, avg=36.12, stdev=50.40 lat (msec): min=4, max=1097, avg=36.14, stdev=50.40 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 8], 10.00th=[ 9], 20.00th=[ 12], | 30.00th=[ 14], 40.00th=[ 17], 50.00th=[ 20], 60.00th=[ 26], | 70.00th=[ 33], 80.00th=[ 49], 90.00th=[ 85], 95.00th=[ 118], | 99.00th=[ 213], 99.50th=[ 239], 99.90th=[ 567], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 7, max= 103, per=33.45%, avg=25.43, stdev=17.96, samples=451 iops : min= 1, max= 25, avg= 5.72, stdev= 4.53, samples=451 write: IOPS=5, BW=23.4KiB/s (23.9kB/s)(6348KiB/271683msec); 0 zone resets clat (msec): min=32, max=638, avg=137.07, stdev=76.88 lat (msec): min=32, max=638, avg=137.07, stdev=76.88 clat percentiles (msec): | 1.00th=[ 43], 5.00th=[ 52], 10.00th=[ 62], 20.00th=[ 77], | 30.00th=[ 88], 40.00th=[ 102], 50.00th=[ 117], 60.00th=[ 136], | 70.00th=[ 157], 80.00th=[ 190], 90.00th=[ 243], 95.00th=[ 296], | 99.00th=[ 388], 99.50th=[ 418], 99.90th=[ 510], 99.95th=[ 642], | 99.99th=[ 642] bw ( KiB/s): min= 7, max= 72, per=29.12%, avg=23.29, stdev=12.75, samples=523 iops : min= 1, max= 18, avg= 5.18, stdev= 3.25, samples=523 lat (msec) : 10=7.06%, 20=17.35%, 50=16.60%, 100=23.86%, 250=30.31% lat (msec) : 500=4.69%, 750=0.10%, 2000=0.03% cpu : usr=0.04%, sys=1.04%, ctx=5397, 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=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=144533: Mon Sep 7 23:50:27 2026 read: IOPS=5, BW=22.2KiB/s (22.7kB/s)(6028KiB/272050msec) clat (msec): min=4, max=509, avg=38.14, stdev=46.50 lat (msec): min=4, max=509, avg=38.14, stdev=46.50 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 8], 10.00th=[ 9], 20.00th=[ 12], | 30.00th=[ 14], 40.00th=[ 17], 50.00th=[ 21], 60.00th=[ 26], | 70.00th=[ 34], 80.00th=[ 57], 90.00th=[ 94], 95.00th=[ 125], | 99.00th=[ 243], 99.50th=[ 275], 99.90th=[ 405], 99.95th=[ 510], | 99.99th=[ 510] bw ( KiB/s): min= 7, max= 104, per=32.85%, avg=24.97, stdev=17.97, samples=465 iops : min= 1, max= 26, avg= 5.61, stdev= 4.55, samples=465 write: IOPS=5, BW=23.0KiB/s (23.6kB/s)(6260KiB/272050msec); 0 zone resets clat (msec): min=26, max=1164, avg=136.79, stdev=83.79 lat (msec): min=26, max=1164, avg=136.79, stdev=83.79 clat percentiles (msec): | 1.00th=[ 40], 5.00th=[ 53], 10.00th=[ 61], 20.00th=[ 74], | 30.00th=[ 87], 40.00th=[ 100], 50.00th=[ 114], 60.00th=[ 132], | 70.00th=[ 155], 80.00th=[ 186], 90.00th=[ 245], 95.00th=[ 296], | 99.00th=[ 409], 99.50th=[ 447], 99.90th=[ 617], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 7, max= 72, per=28.56%, avg=22.85, stdev=13.19, samples=526 iops : min= 1, max= 18, avg= 5.07, stdev= 3.36, samples=526 lat (msec) : 10=6.87%, 20=17.42%, 50=16.15%, 100=25.39%, 250=29.04% lat (msec) : 500=4.92%, 750=0.20%, 2000=0.03% cpu : usr=0.04%, sys=1.08%, ctx=5396, 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= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=144534: Mon Sep 7 23:50:27 2026 read: IOPS=3, BW=15.7KiB/s (16.0kB/s)(2772KiB/177093msec) clat (msec): min=6, max=572, avg=58.23, stdev=58.23 lat (msec): min=6, max=572, avg=58.23, stdev=58.23 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 22], | 30.00th=[ 27], 40.00th=[ 33], 50.00th=[ 41], 60.00th=[ 53], | 70.00th=[ 67], 80.00th=[ 84], 90.00th=[ 121], 95.00th=[ 157], | 99.00th=[ 279], 99.50th=[ 376], 99.90th=[ 575], 99.95th=[ 575], | 99.99th=[ 575] bw ( KiB/s): min= 7, max= 71, per=25.22%, avg=19.17, stdev=12.36, samples=275 iops : min= 1, max= 17, avg= 4.12, stdev= 3.11, samples=275 write: IOPS=4, BW=16.3KiB/s (16.7kB/s)(2888KiB/177093msec); 0 zone resets clat (msec): min=36, max=1168, avg=188.75, stdev=96.70 lat (msec): min=36, max=1168, avg=188.76, stdev=96.70 clat percentiles (msec): | 1.00th=[ 59], 5.00th=[ 75], 10.00th=[ 92], 20.00th=[ 114], | 30.00th=[ 134], 40.00th=[ 155], 50.00th=[ 174], 60.00th=[ 192], | 70.00th=[ 215], 80.00th=[ 247], 90.00th=[ 305], 95.00th=[ 359], | 99.00th=[ 506], 99.50th=[ 542], 99.90th=[ 1167], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 7, max= 48, per=20.24%, avg=16.19, stdev= 8.12, samples=336 iops : min= 1, max= 12, avg= 3.37, stdev= 2.06, samples=336 lat (msec) : 10=1.55%, 20=7.56%, 50=19.28%, 100=21.40%, 250=39.41% lat (msec) : 500=9.96%, 750=0.71%, 2000=0.07% cpu : usr=0.02%, sys=0.89%, ctx=2072, majf=0, minf=18 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=694,722,0,0 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=76.2KiB/s (78.0kB/s), 15.7KiB/s-22.2KiB/s (16.0kB/s-22.7kB/s), io=20.2MiB (21.2MB), run=177093-272050msec WRITE: bw=80.1KiB/s (82.0kB/s), 16.3KiB/s-23.4KiB/s (16.7kB/s-23.9kB/s), io=21.3MiB (22.3MB), run=177093-272050msec 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=144595: Mon Sep 7 23:51:02 2026 read: IOPS=15, BW=242KiB/s (248kB/s)(5920KiB/24420msec) clat (usec): min=30, max=301400, avg=32628.28, stdev=33039.55 lat (usec): min=30, max=301401, avg=32629.90, stdev=33039.61 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 53], 10.00th=[ 60], 20.00th=[ 74], | 30.00th=[ 11863], 40.00th=[ 22152], 50.00th=[ 29754], 60.00th=[ 36963], | 70.00th=[ 45351], 80.00th=[ 53216], 90.00th=[ 67634], 95.00th=[ 81265], | 99.00th=[141558], 99.50th=[229639], 99.90th=[299893], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 108, max= 499, per=24.33%, avg=238.45, stdev=79.44, samples=47 iops : min= 6, max= 31, avg=14.19, stdev= 5.01, samples=47 write: IOPS=16, BW=261KiB/s (267kB/s)(6368KiB/24420msec); 0 zone resets clat (usec): min=1336, max=232338, avg=30322.11, stdev=31659.35 lat (usec): min=1337, max=232341, avg=30327.29, stdev=31659.85 clat percentiles (usec): | 1.00th=[ 1434], 5.00th=[ 1631], 10.00th=[ 1893], 20.00th=[ 4113], | 30.00th=[ 6783], 40.00th=[ 10945], 50.00th=[ 19530], 60.00th=[ 30802], | 70.00th=[ 40633], 80.00th=[ 55313], 90.00th=[ 71828], 95.00th=[ 84411], | 99.00th=[139461], 99.50th=[187696], 99.90th=[231736], 99.95th=[231736], | 99.99th=[231736] bw ( KiB/s): min= 43, max= 540, per=25.24%, avg=260.21, stdev=98.69, samples=47 iops : min= 2, max= 33, avg=15.55, stdev= 6.20, samples=47 lat (usec) : 50=1.95%, 100=9.51%, 250=0.65%, 500=0.65%, 750=0.26% lat (usec) : 1000=0.13% lat (msec) : 2=5.60%, 4=4.82%, 10=9.90%, 20=10.16%, 50=32.55% lat (msec) : 100=21.48%, 250=2.21%, 500=0.13% cpu : usr=0.11%, sys=6.46%, ctx=1408, 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=144597: Mon Sep 7 23:51:02 2026 read: IOPS=15, BW=241KiB/s (247kB/s)(5744KiB/23843msec) clat (usec): min=38, max=149078, avg=31444.25, stdev=25365.99 lat (usec): min=38, max=149079, avg=31445.35, stdev=25366.03 clat percentiles (usec): | 1.00th=[ 43], 5.00th=[ 57], 10.00th=[ 63], 20.00th=[ 78], | 30.00th=[ 19268], 40.00th=[ 25035], 50.00th=[ 29754], 60.00th=[ 36439], | 70.00th=[ 41157], 80.00th=[ 51119], 90.00th=[ 63701], 95.00th=[ 73925], | 99.00th=[110625], 99.50th=[139461], 99.90th=[149947], 99.95th=[149947], | 99.99th=[149947] bw ( KiB/s): min= 21, max= 437, per=24.78%, avg=242.87, stdev=97.89, samples=46 iops : min= 1, max= 27, avg=14.48, stdev= 6.16, samples=46 write: IOPS=17, BW=274KiB/s (281kB/s)(6544KiB/23843msec); 0 zone resets clat (usec): min=1305, max=236858, avg=30204.06, stdev=33581.77 lat (usec): min=1307, max=236861, avg=30206.20, stdev=33581.80 clat percentiles (usec): | 1.00th=[ 1483], 5.00th=[ 1663], 10.00th=[ 1860], 20.00th=[ 3982], | 30.00th=[ 6325], 40.00th=[ 10552], 50.00th=[ 17433], 60.00th=[ 28967], | 70.00th=[ 39060], 80.00th=[ 55837], 90.00th=[ 73925], 95.00th=[ 92799], | 99.00th=[129500], 99.50th=[193987], 99.90th=[235930], 99.95th=[235930], | 99.99th=[235930] bw ( KiB/s): min= 86, max= 544, per=26.78%, avg=276.13, stdev=99.96, samples=46 iops : min= 5, max= 34, avg=16.59, stdev= 6.31, samples=46 lat (usec) : 50=1.04%, 100=8.98%, 250=0.26%, 500=0.26%, 750=0.13% lat (usec) : 1000=0.13% lat (msec) : 2=5.99%, 4=5.08%, 10=10.81%, 20=10.03%, 50=35.81% lat (msec) : 100=19.01%, 250=2.47% cpu : usr=0.12%, sys=6.59%, ctx=1402, 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=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=144598: Mon Sep 7 23:51:02 2026 read: IOPS=16, BW=263KiB/s (270kB/s)(6256KiB/23758msec) clat (usec): min=37, max=230794, avg=31493.69, stdev=27330.33 lat (usec): min=37, max=230795, avg=31500.30, stdev=27329.88 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 56], 10.00th=[ 61], 20.00th=[ 72], | 30.00th=[ 17957], 40.00th=[ 23987], 50.00th=[ 29754], 60.00th=[ 35390], | 70.00th=[ 42206], 80.00th=[ 51643], 90.00th=[ 62653], 95.00th=[ 78119], | 99.00th=[106431], 99.50th=[126354], 99.90th=[231736], 99.95th=[231736], | 99.99th=[231736] bw ( KiB/s): min= 61, max= 541, per=27.15%, avg=266.04, stdev=103.21, samples=46 iops : min= 3, max= 33, avg=15.93, stdev= 6.45, samples=46 write: IOPS=15, BW=254KiB/s (260kB/s)(6032KiB/23758msec); 0 zone resets clat (usec): min=1396, max=277010, avg=30097.70, stdev=34004.55 lat (usec): min=1399, max=277012, avg=30100.42, stdev=34004.13 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1696], 10.00th=[ 2376], 20.00th=[ 4178], | 30.00th=[ 8291], 40.00th=[ 12125], 50.00th=[ 19792], 60.00th=[ 27395], | 70.00th=[ 38536], 80.00th=[ 47449], 90.00th=[ 72877], 95.00th=[ 93848], | 99.00th=[149947], 99.50th=[258999], 99.90th=[278922], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 63, max= 509, per=24.56%, avg=253.22, stdev=101.27, samples=46 iops : min= 3, max= 31, avg=15.13, stdev= 6.43, samples=46 lat (usec) : 50=1.82%, 100=10.29%, 250=0.78%, 1000=0.13% lat (msec) : 2=4.30%, 4=5.21%, 10=8.07%, 20=11.07%, 50=37.76% lat (msec) : 100=17.97%, 250=2.34%, 500=0.26% cpu : usr=0.09%, sys=6.57%, ctx=1402, 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=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=144599: Mon Sep 7 23:51:02 2026 read: IOPS=15, BW=255KiB/s (261kB/s)(6032KiB/23639msec) clat (usec): min=39, max=173290, avg=31535.35, stdev=28282.86 lat (usec): min=40, max=173292, avg=31536.38, stdev=28282.84 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 53], 10.00th=[ 62], 20.00th=[ 74], | 30.00th=[ 14353], 40.00th=[ 21627], 50.00th=[ 29230], 60.00th=[ 35390], | 70.00th=[ 43254], 80.00th=[ 52167], 90.00th=[ 69731], 95.00th=[ 79168], | 99.00th=[110625], 99.50th=[164627], 99.90th=[173016], 99.95th=[173016], | 99.99th=[173016] bw ( KiB/s): min= 122, max= 572, per=26.61%, avg=260.82, stdev=96.38, samples=45 iops : min= 7, max= 35, avg=15.60, stdev= 6.03, samples=45 write: IOPS=16, BW=265KiB/s (271kB/s)(6256KiB/23639msec); 0 zone resets clat (usec): min=1408, max=235672, avg=29428.30, stdev=33678.85 lat (usec): min=1409, max=235675, avg=29435.69, stdev=33682.89 clat percentiles (usec): | 1.00th=[ 1434], 5.00th=[ 1663], 10.00th=[ 2024], 20.00th=[ 4047], | 30.00th=[ 5932], 40.00th=[ 8717], 50.00th=[ 16909], 60.00th=[ 25560], | 70.00th=[ 36439], 80.00th=[ 53216], 90.00th=[ 71828], 95.00th=[ 93848], | 99.00th=[154141], 99.50th=[187696], 99.90th=[235930], 99.95th=[235930], | 99.99th=[235930] bw ( KiB/s): min= 64, max= 608, per=25.83%, avg=266.26, stdev=120.35, samples=46 iops : min= 4, max= 38, avg=15.96, stdev= 7.61, samples=46 lat (usec) : 50=1.82%, 100=10.16%, 250=0.26%, 500=0.13%, 750=0.13% lat (usec) : 1000=0.13% lat (msec) : 2=5.21%, 4=5.34%, 10=11.59%, 20=10.81%, 50=32.68% lat (msec) : 100=19.14%, 250=2.60% cpu : usr=0.10%, sys=6.46%, ctx=1384, 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=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=981KiB/s (1004kB/s), 241KiB/s-263KiB/s (247kB/s-270kB/s), io=23.4MiB (24.5MB), run=23639-24420msec WRITE: bw=1032KiB/s (1057kB/s), 254KiB/s-274KiB/s (260kB/s-281kB/s), io=24.6MiB (25.8MB), run=23639-24420msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144592: Mon Sep 7 23:51:38 2026 read: IOPS=6, BW=102KiB/s (104kB/s)(5920KiB/58317msec) clat (msec): min=6, max=186, avg=31.71, stdev=28.19 lat (msec): min=6, max=186, avg=31.71, stdev=28.19 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 26], | 70.00th=[ 32], 80.00th=[ 42], 90.00th=[ 68], 95.00th=[ 95], | 99.00th=[ 138], 99.50th=[ 182], 99.90th=[ 186], 99.95th=[ 186], | 99.99th=[ 186] bw ( KiB/s): min= 31, max= 416, per=27.07%, avg=108.56, stdev=66.26, samples=107 iops : min= 1, max= 26, avg= 6.07, stdev= 4.20, samples=107 write: IOPS=6, BW=109KiB/s (112kB/s)(6368KiB/58317msec); 0 zone resets clat (msec): min=42, max=311, avg=116.39, stdev=50.45 lat (msec): min=42, max=311, avg=116.40, stdev=50.45 clat percentiles (msec): | 1.00th=[ 44], 5.00th=[ 57], 10.00th=[ 64], 20.00th=[ 72], | 30.00th=[ 83], 40.00th=[ 95], 50.00th=[ 105], 60.00th=[ 120], | 70.00th=[ 136], 80.00th=[ 153], 90.00th=[ 188], 95.00th=[ 211], | 99.00th=[ 288], 99.50th=[ 292], 99.90th=[ 313], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 31, max= 256, per=26.06%, avg=109.96, stdev=44.86, samples=114 iops : min= 1, max= 16, avg= 6.17, stdev= 2.84, samples=114 lat (msec) : 10=3.65%, 20=17.32%, 50=19.92%, 100=28.78%, 250=29.17% lat (msec) : 500=1.17% cpu : usr=0.05%, sys=1.42%, ctx=1341, 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=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=144593: Mon Sep 7 23:51:38 2026 read: IOPS=6, BW=96.3KiB/s (98.6kB/s)(5744KiB/59625msec) clat (msec): min=6, max=192, avg=31.90, stdev=27.24 lat (msec): min=6, max=192, avg=31.90, stdev=27.24 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 34], 80.00th=[ 44], 90.00th=[ 67], 95.00th=[ 91], | 99.00th=[ 150], 99.50th=[ 171], 99.90th=[ 192], 99.95th=[ 192], | 99.99th=[ 192] bw ( KiB/s): min= 22, max= 382, per=25.77%, avg=103.35, stdev=66.63, samples=110 iops : min= 1, max= 23, avg= 5.76, stdev= 4.19, samples=110 write: IOPS=6, BW=110KiB/s (112kB/s)(6544KiB/59625msec); 0 zone resets clat (msec): min=32, max=348, avg=117.66, stdev=51.99 lat (msec): min=32, max=348, avg=117.66, stdev=51.99 clat percentiles (msec): | 1.00th=[ 44], 5.00th=[ 55], 10.00th=[ 66], 20.00th=[ 78], | 30.00th=[ 86], 40.00th=[ 96], 50.00th=[ 106], 60.00th=[ 122], | 70.00th=[ 136], 80.00th=[ 150], 90.00th=[ 182], 95.00th=[ 218], | 99.00th=[ 288], 99.50th=[ 321], 99.90th=[ 351], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 31, max= 256, per=25.90%, avg=109.28, stdev=45.89, samples=118 iops : min= 1, max= 16, avg= 6.14, stdev= 2.96, samples=118 lat (msec) : 10=3.26%, 20=17.71%, 50=19.79%, 100=27.99%, 250=29.43% lat (msec) : 500=1.82% cpu : usr=0.06%, sys=1.37%, ctx=1314, 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=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=144594: Mon Sep 7 23:51:38 2026 read: IOPS=6, BW=109KiB/s (111kB/s)(6256KiB/57560msec) clat (msec): min=5, max=197, avg=30.62, stdev=25.96 lat (msec): min=5, max=197, avg=30.62, stdev=25.96 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 26], | 70.00th=[ 31], 80.00th=[ 40], 90.00th=[ 63], 95.00th=[ 91], | 99.00th=[ 132], 99.50th=[ 136], 99.90th=[ 199], 99.95th=[ 199], | 99.99th=[ 199] bw ( KiB/s): min= 31, max= 440, per=28.49%, avg=114.23, stdev=78.33, samples=108 iops : min= 1, max= 27, avg= 6.44, stdev= 4.94, samples=108 write: IOPS=6, BW=105KiB/s (107kB/s)(6032KiB/57560msec); 0 zone resets clat (msec): min=41, max=324, avg=120.34, stdev=54.73 lat (msec): min=41, max=324, avg=120.34, stdev=54.73 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 53], 10.00th=[ 63], 20.00th=[ 77], | 30.00th=[ 88], 40.00th=[ 100], 50.00th=[ 107], 60.00th=[ 118], | 70.00th=[ 136], 80.00th=[ 159], 90.00th=[ 192], 95.00th=[ 243], | 99.00th=[ 292], 99.50th=[ 321], 99.90th=[ 326], 99.95th=[ 326], | 99.99th=[ 326] bw ( KiB/s): min= 31, max= 224, per=24.95%, avg=105.29, stdev=43.14, samples=112 iops : min= 1, max= 14, avg= 5.88, stdev= 2.75, samples=112 lat (msec) : 10=3.39%, 20=18.49%, 50=23.57%, 100=23.96%, 250=28.39% lat (msec) : 500=2.21% cpu : usr=0.03%, sys=1.40%, ctx=1375, 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=144596: Mon Sep 7 23:51:38 2026 read: IOPS=6, BW=103KiB/s (106kB/s)(6032KiB/58454msec) clat (msec): min=5, max=185, avg=31.49, stdev=28.67 lat (msec): min=5, max=185, avg=31.49, stdev=28.67 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 16], 40.00th=[ 18], 50.00th=[ 21], 60.00th=[ 25], | 70.00th=[ 31], 80.00th=[ 44], 90.00th=[ 69], 95.00th=[ 96], | 99.00th=[ 144], 99.50th=[ 178], 99.90th=[ 186], 99.95th=[ 186], | 99.99th=[ 186] bw ( KiB/s): min= 31, max= 349, per=29.03%, avg=116.40, stdev=72.34, samples=101 iops : min= 1, max= 21, avg= 6.57, stdev= 4.56, samples=101 write: IOPS=6, BW=107KiB/s (110kB/s)(6256KiB/58454msec); 0 zone resets clat (msec): min=37, max=407, avg=118.82, stdev=55.26 lat (msec): min=37, max=407, avg=118.82, stdev=55.26 clat percentiles (msec): | 1.00th=[ 44], 5.00th=[ 55], 10.00th=[ 62], 20.00th=[ 77], | 30.00th=[ 85], 40.00th=[ 95], 50.00th=[ 106], 60.00th=[ 118], | 70.00th=[ 132], 80.00th=[ 161], 90.00th=[ 192], 95.00th=[ 236], | 99.00th=[ 284], 99.50th=[ 321], 99.90th=[ 409], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 30, max= 224, per=25.44%, avg=107.36, stdev=45.22, samples=114 iops : min= 1, max= 14, avg= 6.01, stdev= 2.88, samples=114 lat (msec) : 10=2.99%, 20=20.96%, 50=18.62%, 100=27.21%, 250=28.65% lat (msec) : 500=1.56% cpu : usr=0.06%, sys=1.37%, ctx=1392, 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=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=402KiB/s (411kB/s), 96.3KiB/s-109KiB/s (98.6kB/s-111kB/s), io=23.4MiB (24.5MB), run=57560-59625msec WRITE: bw=423KiB/s (433kB/s), 105KiB/s-110KiB/s (107kB/s-112kB/s), io=24.6MiB (25.8MB), run=57560-59625msec 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=144616: Mon Sep 7 23:51:53 2026 read: IOPS=1, BW=1890KiB/s (1936kB/s)(7168KiB/3792msec) clat (usec): min=519, max=213099, avg=92797.27, stdev=89631.15 lat (usec): min=521, max=213102, avg=92798.72, stdev=89631.23 clat percentiles (usec): | 1.00th=[ 519], 5.00th=[ 519], 10.00th=[ 519], 20.00th=[ 553], | 30.00th=[ 562], 40.00th=[ 562], 50.00th=[141558], 60.00th=[143655], | 70.00th=[143655], 80.00th=[149947], 90.00th=[212861], 95.00th=[212861], | 99.00th=[212861], 99.50th=[212861], 99.90th=[212861], 99.95th=[212861], | 99.99th=[212861] bw ( KiB/s): min= 2019, max= 6131, per=90.67%, avg=4076.33, stdev=2056.00, samples=3 iops : min= 1, max= 5, avg= 3.00, stdev= 2.00, samples=3 write: IOPS=1, BW=1350KiB/s (1383kB/s)(5120KiB/3792msec); 0 zone resets clat (msec): min=141, max=1338, avg=531.05, stdev=465.65 lat (msec): min=141, max=1338, avg=531.17, stdev=465.64 clat percentiles (msec): | 1.00th=[ 142], 5.00th=[ 142], 10.00th=[ 142], 20.00th=[ 142], | 30.00th=[ 334], 40.00th=[ 334], 50.00th=[ 405], 60.00th=[ 405], | 70.00th=[ 435], 80.00th=[ 435], 90.00th=[ 1334], 95.00th=[ 1334], | 99.00th=[ 1334], 99.50th=[ 1334], 99.90th=[ 1334], 99.95th=[ 1334], | 99.99th=[ 1334] bw ( KiB/s): min= 2019, max= 4079, per=43.09%, avg=2712.33, stdev=1183.61, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=25.00% lat (msec) : 250=41.67%, 500=25.00%, 2000=8.33% cpu : usr=0.00%, sys=11.45%, ctx=167, 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=144619: Mon Sep 7 23:51:53 2026 read: IOPS=0, BW=450KiB/s (460kB/s)(2048KiB/4555msec) clat (usec): min=693, max=1045.2k, avg=522955.82, stdev=738590.08 lat (usec): min=695, max=1045.2k, avg=522958.48, stdev=738591.69 clat percentiles (usec): | 1.00th=[ 693], 5.00th=[ 693], 10.00th=[ 693], | 20.00th=[ 693], 30.00th=[ 693], 40.00th=[ 693], | 50.00th=[ 693], 60.00th=[1044382], 70.00th=[1044382], | 80.00th=[1044382], 90.00th=[1044382], 95.00th=[1044382], | 99.00th=[1044382], 99.50th=[1044382], 99.90th=[1044382], | 99.95th=[1044382], 99.99th=[1044382] bw ( KiB/s): min= 2019, max= 2035, per=45.08%, avg=2027.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2248KiB/s (2302kB/s)(10.0MiB/4555msec); 0 zone resets clat (msec): min=83, max=1089, avg=326.20, stdev=298.78 lat (msec): min=83, max=1089, avg=326.32, stdev=298.77 clat percentiles (msec): | 1.00th=[ 84], 5.00th=[ 84], 10.00th=[ 84], 20.00th=[ 104], | 30.00th=[ 113], 40.00th=[ 142], 50.00th=[ 228], 60.00th=[ 326], | 70.00th=[ 330], 80.00th=[ 397], 90.00th=[ 460], 95.00th=[ 1083], | 99.00th=[ 1083], 99.50th=[ 1083], 99.90th=[ 1083], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 1980, max= 4079, per=38.61%, avg=2430.40, stdev=921.89, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (usec) : 750=8.33% lat (msec) : 100=8.33%, 250=33.33%, 500=33.33%, 2000=16.67% cpu : usr=0.02%, sys=11.09%, ctx=198, 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=144621: Mon Sep 7 23:51:53 2026 read: IOPS=3, BW=3197KiB/s (3273kB/s)(6144KiB/1922msec) clat (usec): min=727, max=309117, avg=135103.40, stdev=120456.96 lat (usec): min=729, max=309118, avg=135104.75, stdev=120457.03 clat percentiles (usec): | 1.00th=[ 725], 5.00th=[ 725], 10.00th=[ 725], 20.00th=[ 8225], | 30.00th=[ 8225], 40.00th=[117965], 50.00th=[117965], 60.00th=[152044], | 70.00th=[221250], 80.00th=[221250], 90.00th=[308282], 95.00th=[308282], | 99.00th=[308282], 99.50th=[308282], 99.90th=[308282], 99.95th=[308282], | 99.99th=[308282] bw ( KiB/s): min= 4071, max= 6131, per=100.00%, avg=5101.00, stdev=1456.64, samples=2 iops : min= 3, max= 5, avg= 4.00, stdev= 1.41, samples=2 write: IOPS=3, BW=3197KiB/s (3273kB/s)(6144KiB/1922msec); 0 zone resets clat (msec): min=91, max=205, avg=169.30, stdev=47.32 lat (msec): min=91, max=205, avg=169.44, stdev=47.22 clat percentiles (msec): | 1.00th=[ 91], 5.00th=[ 91], 10.00th=[ 91], 20.00th=[ 131], | 30.00th=[ 131], 40.00th=[ 192], 50.00th=[ 192], 60.00th=[ 192], | 70.00th=[ 205], 80.00th=[ 205], 90.00th=[ 207], 95.00th=[ 207], | 99.00th=[ 207], 99.50th=[ 207], 99.90th=[ 207], 99.95th=[ 207], | 99.99th=[ 207] bw ( KiB/s): min= 2035, max= 4537, per=45.63%, avg=2871.67, stdev=1442.23, samples=3 iops : min= 1, max= 4, avg= 2.00, stdev= 1.73, samples=3 lat (usec) : 750=8.33% lat (msec) : 10=8.33%, 100=8.33%, 250=66.67%, 500=8.33% cpu : usr=0.00%, sys=23.01%, ctx=154, 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=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=144623: Mon Sep 7 23:51:53 2026 read: IOPS=1, BW=1183KiB/s (1211kB/s)(5120KiB/4328msec) clat (msec): min=2, max=197, avg=118.41, stdev=71.87 lat (msec): min=2, max=197, avg=118.41, stdev=71.87 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 3], 10.00th=[ 3], 20.00th=[ 3], | 30.00th=[ 122], 40.00th=[ 122], 50.00th=[ 124], 60.00th=[ 124], | 70.00th=[ 148], 80.00th=[ 148], 90.00th=[ 199], 95.00th=[ 199], | 99.00th=[ 199], 99.50th=[ 199], 99.90th=[ 199], 99.95th=[ 199], | 99.99th=[ 199] bw ( KiB/s): min= 8078, max= 8078, per=100.00%, avg=8078.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=1, BW=1656KiB/s (1696kB/s)(7168KiB/4328msec); 0 zone resets clat (msec): min=112, max=1865, avg=500.09, stdev=613.59 lat (msec): min=112, max=1865, avg=500.23, stdev=613.57 clat percentiles (msec): | 1.00th=[ 113], 5.00th=[ 113], 10.00th=[ 113], 20.00th=[ 232], | 30.00th=[ 239], 40.00th=[ 239], 50.00th=[ 241], 60.00th=[ 305], | 70.00th=[ 305], 80.00th=[ 506], 90.00th=[ 1871], 95.00th=[ 1871], | 99.00th=[ 1871], 99.50th=[ 1871], 99.90th=[ 1871], 99.95th=[ 1871], | 99.99th=[ 1871] bw ( KiB/s): min= 2019, max= 3961, per=38.44%, avg=2419.40, stdev=861.82, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 4=8.33%, 250=66.67%, 500=8.33%, 750=8.33%, 2000=8.33% cpu : usr=0.05%, sys=9.71%, ctx=125, 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=4496KiB/s (4604kB/s), 450KiB/s-3197KiB/s (460kB/s-3273kB/s), io=20.0MiB (20.0MB), run=1922-4555msec WRITE: bw=6295KiB/s (6446kB/s), 1350KiB/s-3197KiB/s (1383kB/s-3273kB/s), io=28.0MiB (29.4MB), run=1922-4555msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144617: Mon Sep 7 23:51:53 2026 read: IOPS=1, BW=1981KiB/s (2028kB/s)(7168KiB/3619msec) clat (msec): min=87, max=451, avg=158.23, stdev=130.58 lat (msec): min=87, max=451, avg=158.23, stdev=130.58 clat percentiles (msec): | 1.00th=[ 88], 5.00th=[ 88], 10.00th=[ 88], 20.00th=[ 95], | 30.00th=[ 102], 40.00th=[ 102], 50.00th=[ 113], 60.00th=[ 116], | 70.00th=[ 116], 80.00th=[ 144], 90.00th=[ 451], 95.00th=[ 451], | 99.00th=[ 451], 99.50th=[ 451], 99.90th=[ 451], 99.95th=[ 451], | 99.99th=[ 451] bw ( KiB/s): min= 2035, max= 4571, per=67.97%, avg=2884.67, stdev=1460.42, samples=3 iops : min= 1, max= 4, avg= 2.33, stdev= 1.53, samples=3 write: IOPS=1, BW=1415KiB/s (1449kB/s)(5120KiB/3619msec); 0 zone resets clat (msec): min=189, max=1295, avg=474.46, stdev=465.46 lat (msec): min=189, max=1295, avg=474.62, stdev=465.40 clat percentiles (msec): | 1.00th=[ 190], 5.00th=[ 190], 10.00th=[ 190], 20.00th=[ 190], | 30.00th=[ 209], 40.00th=[ 209], 50.00th=[ 296], 60.00th=[ 296], | 70.00th=[ 384], 80.00th=[ 384], 90.00th=[ 1301], 95.00th=[ 1301], | 99.00th=[ 1301], 99.50th=[ 1301], 99.90th=[ 1301], 99.95th=[ 1301], | 99.99th=[ 1301] bw ( KiB/s): min= 2035, max= 4079, per=45.79%, avg=2720.67, stdev=1176.37, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 lat (msec) : 100=16.67%, 250=50.00%, 500=25.00%, 2000=8.33% cpu : usr=0.03%, sys=3.62%, ctx=66, 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=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=144618: Mon Sep 7 23:51:53 2026 read: IOPS=0, BW=459KiB/s (470kB/s)(2048KiB/4462msec) clat (msec): min=114, max=385, avg=250.02, stdev=191.36 lat (msec): min=114, max=385, avg=250.02, stdev=191.36 clat percentiles (msec): | 1.00th=[ 115], 5.00th=[ 115], 10.00th=[ 115], 20.00th=[ 115], | 30.00th=[ 115], 40.00th=[ 115], 50.00th=[ 115], 60.00th=[ 384], | 70.00th=[ 384], 80.00th=[ 384], 90.00th=[ 384], 95.00th=[ 384], | 99.00th=[ 384], 99.50th=[ 384], 99.90th=[ 384], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 1432, max= 2039, per=40.89%, avg=1735.50, stdev=429.21, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2295KiB/s (2350kB/s)(10.0MiB/4462msec); 0 zone resets clat (msec): min=134, max=2095, avg=393.23, stdev=600.85 lat (msec): min=134, max=2095, avg=393.40, stdev=600.82 clat percentiles (msec): | 1.00th=[ 136], 5.00th=[ 136], 10.00th=[ 136], 20.00th=[ 148], | 30.00th=[ 161], 40.00th=[ 178], 50.00th=[ 186], 60.00th=[ 211], | 70.00th=[ 239], 80.00th=[ 259], 90.00th=[ 326], 95.00th=[ 2089], | 99.00th=[ 2089], 99.50th=[ 2089], 99.90th=[ 2089], 99.95th=[ 2089], | 99.99th=[ 2089] bw ( KiB/s): min= 1432, max= 6000, per=59.31%, avg=3524.20, stdev=1824.79, samples=5 iops : min= 1, max= 5, avg= 2.60, stdev= 1.67, samples=5 lat (msec) : 250=66.67%, 500=25.00%, >=2000=8.33% cpu : usr=0.00%, sys=3.00%, ctx=42, 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=144620: Mon Sep 7 23:51:53 2026 read: IOPS=1, BW=1476KiB/s (1512kB/s)(6144KiB/4162msec) clat (msec): min=76, max=379, avg=190.52, stdev=126.92 lat (msec): min=76, max=379, avg=190.52, stdev=126.92 clat percentiles (msec): | 1.00th=[ 77], 5.00th=[ 77], 10.00th=[ 77], 20.00th=[ 91], | 30.00th=[ 91], 40.00th=[ 95], 50.00th=[ 95], 60.00th=[ 199], | 70.00th=[ 305], 80.00th=[ 305], 90.00th=[ 380], 95.00th=[ 380], | 99.00th=[ 380], 99.50th=[ 380], 99.90th=[ 380], 99.95th=[ 380], | 99.99th=[ 380] bw ( KiB/s): min= 2035, max= 4079, per=64.04%, avg=2717.67, stdev=1178.95, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1476KiB/s (1512kB/s)(6144KiB/4162msec); 0 zone resets clat (msec): min=137, max=1536, avg=480.63, stdev=533.28 lat (msec): min=138, max=1538, avg=481.23, stdev=534.15 clat percentiles (msec): | 1.00th=[ 138], 5.00th=[ 138], 10.00th=[ 138], 20.00th=[ 163], | 30.00th=[ 163], 40.00th=[ 197], 50.00th=[ 197], 60.00th=[ 409], | 70.00th=[ 447], 80.00th=[ 447], 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= 2035, max= 2048, per=34.35%, avg=2041.25, stdev= 5.56, samples=4 iops : min= 1, max= 2, avg= 1.25, stdev= 0.50, samples=4 lat (msec) : 100=25.00%, 250=33.33%, 500=33.33%, 2000=8.33% cpu : usr=0.00%, sys=2.48%, ctx=60, 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=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=144622: Mon Sep 7 23:51:53 2026 read: IOPS=1, BW=1061KiB/s (1087kB/s)(5120KiB/4825msec) clat (msec): min=39, max=580, avg=289.75, stdev=219.11 lat (msec): min=39, max=580, avg=289.75, stdev=219.11 clat percentiles (msec): | 1.00th=[ 40], 5.00th=[ 40], 10.00th=[ 40], 20.00th=[ 40], | 30.00th=[ 126], 40.00th=[ 126], 50.00th=[ 284], 60.00th=[ 284], | 70.00th=[ 422], 80.00th=[ 422], 90.00th=[ 584], 95.00th=[ 584], | 99.00th=[ 584], 99.50th=[ 584], 99.90th=[ 584], 99.95th=[ 584], | 99.99th=[ 584] bw ( KiB/s): min= 2023, max= 4000, per=63.32%, avg=2687.33, stdev=1136.83, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1486KiB/s (1521kB/s)(7168KiB/4825msec); 0 zone resets clat (msec): min=78, max=1454, avg=446.36, stdev=480.83 lat (msec): min=78, max=1454, avg=446.46, stdev=480.84 clat percentiles (msec): | 1.00th=[ 79], 5.00th=[ 79], 10.00th=[ 79], 20.00th=[ 128], | 30.00th=[ 144], 40.00th=[ 144], 50.00th=[ 275], 60.00th=[ 485], | 70.00th=[ 485], 80.00th=[ 558], 90.00th=[ 1452], 95.00th=[ 1452], | 99.00th=[ 1452], 99.50th=[ 1452], 99.90th=[ 1452], 99.95th=[ 1452], | 99.99th=[ 1452] bw ( KiB/s): min= 2039, max= 4071, per=51.35%, avg=3051.25, stdev=1163.70, samples=4 iops : min= 1, max= 3, avg= 2.25, stdev= 0.96, samples=4 lat (msec) : 50=8.33%, 100=8.33%, 250=25.00%, 500=33.33%, 750=16.67% lat (msec) : 2000=8.33% cpu : usr=0.00%, sys=3.77%, ctx=143, 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=4245KiB/s (4346kB/s), 459KiB/s-1981KiB/s (470kB/s-2028kB/s), io=20.0MiB (20.0MB), run=3619-4825msec WRITE: bw=5942KiB/s (6085kB/s), 1415KiB/s-2295KiB/s (1449kB/s-2350kB/s), io=28.0MiB (29.4MB), run=3619-4825msec 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=144631: Mon Sep 7 23:52:09 2026 read: IOPS=0, BW=3199KiB/s (3276kB/s)(12.0MiB/3841msec) clat (msec): min=984, max=1462, avg=1252.04, stdev=243.76 lat (msec): min=984, max=1462, avg=1252.04, stdev=243.76 clat percentiles (msec): | 1.00th=[ 986], 5.00th=[ 986], 10.00th=[ 986], 20.00th=[ 986], | 30.00th=[ 986], 40.00th=[ 1318], 50.00th=[ 1318], 60.00th=[ 1318], | 70.00th=[ 1469], 80.00th=[ 1469], 90.00th=[ 1469], 95.00th=[ 1469], | 99.00th=[ 1469], 99.50th=[ 1469], 99.90th=[ 1469], 99.95th=[ 1469], | 99.99th=[ 1469] bw ( KiB/s): min= 8000, max= 8175, per=100.00%, avg=8087.50, stdev=123.74, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=1.95%, ctx=56, 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=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=144632: Mon Sep 7 23:52:09 2026 read: IOPS=0, BW=937KiB/s (959kB/s)(4096KiB/4373msec) clat (nsec): min=2199.7M, max=2199.7M, avg=2199691301.00, stdev= 0.00 lat (nsec): min=2199.7M, max=2199.7M, avg=2199693949.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 2198], 5.00th=[ 2198], 10.00th=[ 2198], 20.00th=[ 2198], | 30.00th=[ 2198], 40.00th=[ 2198], 50.00th=[ 2198], 60.00th=[ 2198], | 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= 8031, max= 8031, per=100.00%, avg=8031.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1873KiB/s (1918kB/s)(8192KiB/4373msec); 0 zone resets clat (msec): min=863, max=1144, avg=1003.88, stdev=198.71 lat (msec): min=863, max=1144, avg=1004.31, stdev=198.80 clat percentiles (msec): | 1.00th=[ 860], 5.00th=[ 860], 10.00th=[ 860], 20.00th=[ 860], | 30.00th=[ 860], 40.00th=[ 860], 50.00th=[ 860], 60.00th=[ 1150], | 70.00th=[ 1150], 80.00th=[ 1150], 90.00th=[ 1150], 95.00th=[ 1150], | 99.00th=[ 1150], 99.50th=[ 1150], 99.90th=[ 1150], 99.95th=[ 1150], | 99.99th=[ 1150] 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) : 1000=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.05%, sys=3.48%, ctx=76, 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=144634: Mon Sep 7 23:52:09 2026 write: IOPS=0, BW=3043KiB/s (3116kB/s)(12.0MiB/4038msec); 0 zone resets clat (msec): min=436, max=1998, avg=1281.44, stdev=789.13 lat (msec): min=437, max=2000, avg=1282.55, stdev=789.03 clat percentiles (msec): | 1.00th=[ 435], 5.00th=[ 435], 10.00th=[ 435], 20.00th=[ 435], | 30.00th=[ 435], 40.00th=[ 1418], 50.00th=[ 1418], 60.00th=[ 1418], | 70.00th=[ 2005], 80.00th=[ 2005], 90.00th=[ 2005], 95.00th=[ 2005], | 99.00th=[ 2005], 99.50th=[ 2005], 99.90th=[ 2005], 99.95th=[ 2005], | 99.99th=[ 2005] bw ( KiB/s): min= 8000, max= 8000, per=100.00%, avg=8000.00, 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=3.99%, ctx=49, 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=144636: Mon Sep 7 23:52:09 2026 write: IOPS=0, BW=3476KiB/s (3560kB/s)(12.0MiB/3535msec); 0 zone resets clat (msec): min=405, max=1873, avg=1126.37, stdev=734.24 lat (msec): min=406, max=1874, avg=1133.24, stdev=734.12 clat percentiles (msec): | 1.00th=[ 405], 5.00th=[ 405], 10.00th=[ 405], 20.00th=[ 405], | 30.00th=[ 405], 40.00th=[ 1099], 50.00th=[ 1099], 60.00th=[ 1099], | 70.00th=[ 1871], 80.00th=[ 1871], 90.00th=[ 1871], 95.00th=[ 1871], | 99.00th=[ 1871], 99.50th=[ 1871], 99.90th=[ 1871], 99.95th=[ 1871], | 99.99th=[ 1871] bw ( KiB/s): min=16384, max=16384, per=100.00%, avg=16384.00, stdev= 0.00, samples=1 iops : min= 4, max= 4, avg= 4.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.06%, sys=3.31%, ctx=50, 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=3747KiB/s (3837kB/s), 937KiB/s-3199KiB/s (959kB/s-3276kB/s), io=16.0MiB (16.8MB), run=3841-4373msec WRITE: bw=7493KiB/s (7673kB/s), 1873KiB/s-3476KiB/s (1918kB/s-3560kB/s), io=32.0MiB (33.6MB), run=3535-4373msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144633: Mon Sep 7 23:52:09 2026 read: IOPS=0, BW=3546KiB/s (3631kB/s)(12.0MiB/3465msec) clat (msec): min=884, max=1465, avg=1125.28, stdev=302.62 lat (msec): min=884, max=1465, avg=1125.29, stdev=302.62 clat percentiles (msec): | 1.00th=[ 885], 5.00th=[ 885], 10.00th=[ 885], 20.00th=[ 885], | 30.00th=[ 885], 40.00th=[ 1028], 50.00th=[ 1028], 60.00th=[ 1028], | 70.00th=[ 1469], 80.00th=[ 1469], 90.00th=[ 1469], 95.00th=[ 1469], | 99.00th=[ 1469], 99.50th=[ 1469], 99.90th=[ 1469], 99.95th=[ 1469], | 99.99th=[ 1469] bw ( KiB/s): min= 8062, max= 8175, per=100.00%, avg=8118.50, stdev=79.90, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=10.39%, ctx=419, 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=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=144635: Mon Sep 7 23:52:09 2026 read: IOPS=0, BW=1060KiB/s (1085kB/s)(4096KiB/3864msec) clat (nsec): min=1205.3M, max=1205.3M, avg=1205320502.00, stdev= 0.00 lat (nsec): min=1205.3M, max=1205.3M, avg=1205322944.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1200], 5.00th=[ 1200], 10.00th=[ 1200], 20.00th=[ 1200], | 30.00th=[ 1200], 40.00th=[ 1200], 50.00th=[ 1200], 60.00th=[ 1200], | 70.00th=[ 1200], 80.00th=[ 1200], 90.00th=[ 1200], 95.00th=[ 1200], | 99.00th=[ 1200], 99.50th=[ 1200], 99.90th=[ 1200], 99.95th=[ 1200], | 99.99th=[ 1200] 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 write: IOPS=0, BW=2120KiB/s (2171kB/s)(8192KiB/3864msec); 0 zone resets clat (msec): min=975, max=1600, avg=1288.23, stdev=441.64 lat (msec): min=976, max=1600, avg=1288.52, stdev=441.77 clat percentiles (msec): | 1.00th=[ 978], 5.00th=[ 978], 10.00th=[ 978], 20.00th=[ 978], | 30.00th=[ 978], 40.00th=[ 978], 50.00th=[ 978], 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= 8192, max= 8192, per=100.00%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.06%, ctx=156, 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=144637: Mon Sep 7 23:52:09 2026 write: IOPS=0, BW=2895KiB/s (2965kB/s)(12.0MiB/4244msec); 0 zone resets clat (msec): min=253, max=3071, avg=1393.99, stdev=1484.20 lat (msec): min=253, max=3072, avg=1394.58, stdev=1484.16 clat percentiles (msec): | 1.00th=[ 253], 5.00th=[ 253], 10.00th=[ 253], 20.00th=[ 253], | 30.00th=[ 253], 40.00th=[ 860], 50.00th=[ 860], 60.00th=[ 860], | 70.00th=[ 3071], 80.00th=[ 3071], 90.00th=[ 3071], 95.00th=[ 3071], | 99.00th=[ 3071], 99.50th=[ 3071], 99.90th=[ 3071], 99.95th=[ 3071], | 99.99th=[ 3071] bw ( KiB/s): min= 7892, max= 8126, per=100.00%, avg=8009.00, stdev=165.46, 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=1.84%, ctx=35, 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=144638: Mon Sep 7 23:52:09 2026 write: IOPS=0, BW=3132KiB/s (3207kB/s)(12.0MiB/3923msec); 0 zone resets clat (msec): min=659, max=1608, avg=1243.97, stdev=511.02 lat (msec): min=660, max=1610, avg=1247.15, stdev=513.11 clat percentiles (msec): | 1.00th=[ 659], 5.00th=[ 659], 10.00th=[ 659], 20.00th=[ 659], | 30.00th=[ 659], 40.00th=[ 1469], 50.00th=[ 1469], 60.00th=[ 1469], | 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= 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) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.06%, ctx=73, 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=4240KiB/s (4342kB/s), 1060KiB/s-3546KiB/s (1085kB/s-3631kB/s), io=16.0MiB (16.8MB), run=3465-3864msec WRITE: bw=7721KiB/s (7906kB/s), 2120KiB/s-3132KiB/s (2171kB/s-3207kB/s), io=32.0MiB (33.6MB), run=3864-4244msec