== sanity test 398b: DIO and buffer IO race ============== 12:01:00 (1788883260) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 3.76137 s, 13.4 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=150415: Tue Sep 8 12:02:19 2026 read: IOPS=22, BW=88.0KiB/s (90.1kB/s)(5992KiB/68076msec) clat (usec): min=33, max=1491.2k, avg=23999.45, stdev=40602.01 lat (usec): min=33, max=1491.2k, avg=24001.38, stdev=40602.25 clat percentiles (usec): | 1.00th=[ 106], 5.00th=[ 6128], 10.00th=[ 8848], | 20.00th=[ 12387], 30.00th=[ 15270], 40.00th=[ 17957], | 50.00th=[ 20841], 60.00th=[ 23725], 70.00th=[ 27919], | 80.00th=[ 31851], 90.00th=[ 39060], 95.00th=[ 45351], | 99.00th=[ 70779], 99.50th=[ 90702], 99.90th=[ 191890], | 99.95th=[1484784], 99.99th=[1484784] bw ( KiB/s): min= 13, max= 174, per=25.32%, avg=88.89, stdev=27.73, samples=133 iops : min= 3, max= 43, avg=21.75, stdev= 7.01, samples=133 write: IOPS=23, BW=92.5KiB/s (94.7kB/s)(6296KiB/68076msec); 0 zone resets clat (usec): min=679, max=124944, avg=20158.47, stdev=16057.38 lat (usec): min=679, max=124945, avg=20159.18, stdev=16057.40 clat percentiles (usec): | 1.00th=[ 750], 5.00th=[ 2442], 10.00th=[ 3916], 20.00th=[ 6259], | 30.00th=[ 8979], 40.00th=[ 13173], 50.00th=[ 17433], 60.00th=[ 20579], | 70.00th=[ 25297], 80.00th=[ 31851], 90.00th=[ 40633], 95.00th=[ 51119], | 99.00th=[ 72877], 99.50th=[ 92799], 99.90th=[109577], 99.95th=[125305], | 99.99th=[125305] bw ( KiB/s): min= 23, max= 192, per=25.68%, avg=94.26, stdev=30.73, samples=132 iops : min= 5, max= 48, avg=23.09, stdev= 7.76, samples=132 lat (usec) : 50=0.20%, 100=0.20%, 250=1.07%, 500=0.46%, 750=0.55% lat (usec) : 1000=0.98% lat (msec) : 2=0.59%, 4=3.12%, 10=15.82%, 20=30.34%, 50=42.45% lat (msec) : 100=3.91%, 250=0.29%, 2000=0.03% cpu : usr=0.08%, sys=28.17%, ctx=9610, 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=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=150416: Tue Sep 8 12:02:19 2026 read: IOPS=22, BW=88.3KiB/s (90.4kB/s)(5940KiB/67250msec) clat (usec): min=29, max=111159, avg=22381.41, stdev=12886.39 lat (usec): min=30, max=111160, avg=22382.01, stdev=12886.40 clat percentiles (usec): | 1.00th=[ 118], 5.00th=[ 6128], 10.00th=[ 9372], 20.00th=[ 12911], | 30.00th=[ 15270], 40.00th=[ 17433], 50.00th=[ 19792], 60.00th=[ 22414], | 70.00th=[ 26608], 80.00th=[ 31851], 90.00th=[ 38011], 95.00th=[ 44827], | 99.00th=[ 65799], 99.50th=[ 68682], 99.90th=[104334], 99.95th=[111674], | 99.99th=[111674] bw ( KiB/s): min= 6, max= 184, per=25.42%, avg=89.23, stdev=32.82, samples=131 iops : min= 1, max= 46, avg=21.82, stdev= 8.31, samples=131 write: IOPS=23, BW=94.4KiB/s (96.7kB/s)(6348KiB/67250msec); 0 zone resets clat (usec): min=682, max=1496.3k, avg=21174.55, stdev=40874.71 lat (usec): min=683, max=1496.3k, avg=21175.26, stdev=40874.72 clat percentiles (usec): | 1.00th=[ 750], 5.00th=[ 2073], 10.00th=[ 3654], | 20.00th=[ 6063], 30.00th=[ 8225], 40.00th=[ 12518], | 50.00th=[ 16712], 60.00th=[ 20579], 70.00th=[ 25035], | 80.00th=[ 31589], 90.00th=[ 42206], 95.00th=[ 50594], | 99.00th=[ 80217], 99.50th=[ 110625], 99.90th=[ 152044], | 99.95th=[1501561], 99.99th=[1501561] bw ( KiB/s): min= 39, max= 208, per=26.13%, avg=95.88, stdev=32.41, samples=130 iops : min= 9, max= 52, avg=23.49, stdev= 8.22, samples=130 lat (usec) : 50=0.13%, 100=0.26%, 250=0.98%, 500=0.42%, 750=0.62% lat (usec) : 1000=0.98% lat (msec) : 2=0.91%, 4=3.39%, 10=15.98%, 20=31.05%, 50=40.89% lat (msec) : 100=4.00%, 250=0.36%, 2000=0.03% cpu : usr=0.07%, sys=28.07%, ctx=9577, 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=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=150417: Tue Sep 8 12:02:19 2026 read: IOPS=22, BW=88.2KiB/s (90.3kB/s)(6028KiB/68370msec) clat (usec): min=31, max=131816, avg=22615.35, stdev=13492.45 lat (usec): min=31, max=131816, avg=22616.02, stdev=13492.46 clat percentiles (usec): | 1.00th=[ 96], 5.00th=[ 5145], 10.00th=[ 8717], 20.00th=[ 12518], | 30.00th=[ 15533], 40.00th=[ 17695], 50.00th=[ 20579], 60.00th=[ 23725], | 70.00th=[ 27395], 80.00th=[ 31589], 90.00th=[ 38011], 95.00th=[ 44827], | 99.00th=[ 69731], 99.50th=[ 76022], 99.90th=[110625], 99.95th=[131597], | 99.99th=[131597] bw ( KiB/s): min= 31, max= 183, per=25.64%, avg=90.00, stdev=26.38, samples=133 iops : min= 7, max= 45, avg=22.03, stdev= 6.67, samples=133 write: IOPS=22, BW=91.6KiB/s (93.8kB/s)(6260KiB/68370msec); 0 zone resets clat (usec): min=660, max=1432.3k, avg=21663.61, stdev=39722.64 lat (usec): min=661, max=1432.3k, avg=21665.20, stdev=39722.88 clat percentiles (usec): | 1.00th=[ 766], 5.00th=[ 2573], 10.00th=[ 4359], | 20.00th=[ 6390], 30.00th=[ 8586], 40.00th=[ 12518], | 50.00th=[ 16909], 60.00th=[ 20841], 70.00th=[ 26608], | 80.00th=[ 32900], 90.00th=[ 42730], 95.00th=[ 52167], | 99.00th=[ 82314], 99.50th=[ 101188], 99.90th=[ 149947], | 99.95th=[1434452], 99.99th=[1434452] bw ( KiB/s): min= 31, max= 208, per=25.44%, avg=93.37, stdev=32.72, samples=133 iops : min= 7, max= 52, avg=22.87, stdev= 8.26, samples=133 lat (usec) : 50=0.33%, 100=0.23%, 250=1.30%, 500=0.23%, 750=0.39% lat (usec) : 1000=0.88% lat (msec) : 2=0.78%, 4=2.60%, 10=16.63%, 20=29.85%, 50=42.42% lat (msec) : 100=3.97%, 250=0.36%, 2000=0.03% cpu : usr=0.06%, sys=28.07%, ctx=9605, 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=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=150418: Tue Sep 8 12:02:19 2026 read: IOPS=22, BW=88.7KiB/s (90.8kB/s)(6052KiB/68266msec) clat (usec): min=30, max=134956, avg=22541.34, stdev=13772.37 lat (usec): min=31, max=134956, avg=22546.30, stdev=13771.20 clat percentiles (usec): | 1.00th=[ 116], 5.00th=[ 5473], 10.00th=[ 9110], 20.00th=[ 12518], | 30.00th=[ 15139], 40.00th=[ 17433], 50.00th=[ 19792], 60.00th=[ 22938], | 70.00th=[ 26608], 80.00th=[ 31851], 90.00th=[ 38536], 95.00th=[ 46400], | 99.00th=[ 71828], 99.50th=[ 81265], 99.90th=[ 96994], 99.95th=[135267], | 99.99th=[135267] bw ( KiB/s): min= 31, max= 223, per=25.66%, avg=90.08, stdev=27.84, samples=132 iops : min= 7, max= 55, avg=22.05, stdev= 7.01, samples=132 write: IOPS=22, BW=91.3KiB/s (93.5kB/s)(6236KiB/68266msec); 0 zone resets clat (usec): min=679, max=1410.6k, avg=21663.23, stdev=39367.70 lat (usec): min=679, max=1410.6k, avg=21664.07, stdev=39367.67 clat percentiles (usec): | 1.00th=[ 775], 5.00th=[ 2671], 10.00th=[ 4359], | 20.00th=[ 6652], 30.00th=[ 9110], 40.00th=[ 13173], | 50.00th=[ 16909], 60.00th=[ 20579], 70.00th=[ 25560], | 80.00th=[ 32113], 90.00th=[ 42730], 95.00th=[ 52691], | 99.00th=[ 73925], 99.50th=[ 122160], 99.90th=[ 162530], | 99.95th=[1417675], 99.99th=[1417675] bw ( KiB/s): min= 13, max= 214, per=25.14%, avg=92.26, stdev=31.87, samples=133 iops : min= 3, max= 53, avg=22.59, stdev= 8.06, samples=133 lat (usec) : 50=0.13%, 100=0.16%, 250=1.60%, 500=0.39%, 750=0.33% lat (usec) : 1000=0.55% lat (msec) : 2=0.81%, 4=2.83%, 10=15.36%, 20=32.36%, 50=40.62% lat (msec) : 100=4.49%, 250=0.33%, 2000=0.03% cpu : usr=0.05%, sys=28.15%, ctx=9570, majf=0, minf=19 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=351KiB/s (360kB/s), 88.0KiB/s-88.7KiB/s (90.1kB/s-90.8kB/s), io=23.4MiB (24.6MB), run=67250-68370msec WRITE: bw=368KiB/s (377kB/s), 91.3KiB/s-94.4KiB/s (93.5kB/s-96.7kB/s), io=24.6MiB (25.7MB), run=67250-68370msec rand-rw: (groupid=0, jobs=1): err= 0: pid=150420: Tue Sep 8 12:02:44 2026 read: IOPS=15, BW=63.0KiB/s (65.5kB/s)(5992KiB/93648msec) clat (msec): min=2, max=1502, avg=19.33, stdev=43.12 lat (msec): min=2, max=1502, avg=19.33, stdev=43.12 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 4], 10.00th=[ 4], 20.00th=[ 5], | 30.00th=[ 6], 40.00th=[ 7], 50.00th=[ 11], 60.00th=[ 16], | 70.00th=[ 22], 80.00th=[ 29], 90.00th=[ 44], 95.00th=[ 58], | 99.00th=[ 100], 99.50th=[ 120], 99.90th=[ 159], 99.95th=[ 1502], | 99.99th=[ 1502] bw ( KiB/s): min= 7, max= 192, per=25.37%, avg=64.94, stdev=39.93, samples=182 iops : min= 1, max= 48, avg=15.92, stdev=10.14, samples=182 write: IOPS=16, BW=67.2KiB/s (68.8kB/s)(6296KiB/93648msec); 0 zone resets clat (msec): min=13, max=233, avg=40.88, stdev=23.05 lat (msec): min=13, max=233, avg=40.88, stdev=23.05 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 21], 10.00th=[ 22], 20.00th=[ 25], | 30.00th=[ 28], 40.00th=[ 31], 50.00th=[ 34], 60.00th=[ 39], | 70.00th=[ 46], 80.00th=[ 55], 90.00th=[ 70], 95.00th=[ 82], | 99.00th=[ 130], 99.50th=[ 167], 99.90th=[ 232], 99.95th=[ 234], | 99.99th=[ 234] bw ( KiB/s): min= 7, max= 152, per=25.37%, avg=67.99, stdev=37.17, samples=183 iops : min= 1, max= 38, avg=16.68, stdev= 9.48, samples=183 lat (msec) : 4=6.45%, 10=17.32%, 20=11.75%, 50=47.92%, 100=15.14% lat (msec) : 250=1.40%, 2000=0.03% cpu : usr=0.05%, sys=8.77%, ctx=6145, 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=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=150421: Tue Sep 8 12:02:44 2026 read: IOPS=15, BW=63.4KiB/s (64.9kB/s)(5940KiB/93758msec) clat (msec): min=2, max=1420, avg=19.39, stdev=41.51 lat (msec): min=2, max=1420, avg=19.39, stdev=41.51 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 4], 10.00th=[ 4], 20.00th=[ 5], | 30.00th=[ 6], 40.00th=[ 7], 50.00th=[ 11], 60.00th=[ 17], | 70.00th=[ 21], 80.00th=[ 29], 90.00th=[ 46], 95.00th=[ 62], | 99.00th=[ 91], 99.50th=[ 113], 99.90th=[ 220], 99.95th=[ 1418], | 99.99th=[ 1418] bw ( KiB/s): min= 7, max= 224, per=24.99%, avg=63.97, stdev=40.01, samples=183 iops : min= 1, max= 56, avg=15.68, stdev=10.17, samples=183 write: IOPS=16, BW=67.7KiB/s (69.3kB/s)(6348KiB/93758msec); 0 zone resets clat (msec): min=12, max=246, avg=40.72, stdev=22.25 lat (msec): min=12, max=246, avg=40.72, stdev=22.25 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 21], 10.00th=[ 22], 20.00th=[ 25], | 30.00th=[ 28], 40.00th=[ 31], 50.00th=[ 34], 60.00th=[ 39], | 70.00th=[ 45], 80.00th=[ 55], 90.00th=[ 69], 95.00th=[ 82], | 99.00th=[ 118], 99.50th=[ 150], 99.90th=[ 224], 99.95th=[ 247], | 99.99th=[ 247] bw ( KiB/s): min= 23, max= 152, per=25.44%, avg=68.17, stdev=35.69, samples=183 iops : min= 5, max= 38, avg=16.73, stdev= 9.11, samples=183 lat (msec) : 4=6.45%, 10=17.48%, 20=11.72%, 50=48.11%, 100=14.68% lat (msec) : 250=1.53%, 2000=0.03% cpu : usr=0.05%, sys=8.85%, ctx=6113, 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=150422: Tue Sep 8 12:02:44 2026 read: IOPS=16, BW=64.4KiB/s (65.9kB/s)(6028KiB/93620msec) clat (msec): min=2, max=164, avg=18.08, stdev=18.36 lat (msec): min=2, max=164, avg=18.08, stdev=18.36 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 4], 10.00th=[ 4], 20.00th=[ 5], | 30.00th=[ 6], 40.00th=[ 7], 50.00th=[ 11], 60.00th=[ 17], | 70.00th=[ 22], 80.00th=[ 30], 90.00th=[ 44], 95.00th=[ 56], | 99.00th=[ 83], 99.50th=[ 92], 99.90th=[ 114], 99.95th=[ 165], | 99.99th=[ 165] bw ( KiB/s): min= 7, max= 232, per=25.47%, avg=65.19, stdev=41.49, samples=183 iops : min= 1, max= 58, avg=15.98, stdev=10.53, samples=183 write: IOPS=16, BW=66.9KiB/s (68.5kB/s)(6260KiB/93620msec); 0 zone resets clat (msec): min=14, max=1424, avg=42.19, stdev=42.33 lat (msec): min=14, max=1424, avg=42.20, stdev=42.33 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 21], 10.00th=[ 22], 20.00th=[ 25], | 30.00th=[ 28], 40.00th=[ 31], 50.00th=[ 34], 60.00th=[ 39], | 70.00th=[ 46], 80.00th=[ 55], 90.00th=[ 71], 95.00th=[ 85], | 99.00th=[ 148], 99.50th=[ 167], 99.90th=[ 245], 99.95th=[ 1418], | 99.99th=[ 1418] bw ( KiB/s): min= 15, max= 152, per=25.22%, avg=67.60, stdev=37.11, samples=183 iops : min= 3, max= 38, avg=16.58, stdev= 9.46, samples=183 lat (msec) : 4=7.23%, 10=16.70%, 20=11.78%, 50=48.80%, 100=14.10% lat (msec) : 250=1.37%, 2000=0.03% cpu : usr=0.05%, sys=8.79%, ctx=6112, 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=150423: Tue Sep 8 12:02:44 2026 read: IOPS=16, BW=65.0KiB/s (66.6kB/s)(6052KiB/93104msec) clat (msec): min=2, max=166, avg=18.28, stdev=19.45 lat (msec): min=2, max=166, avg=18.28, stdev=19.45 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 4], 10.00th=[ 4], 20.00th=[ 5], | 30.00th=[ 6], 40.00th=[ 7], 50.00th=[ 11], 60.00th=[ 16], | 70.00th=[ 21], 80.00th=[ 30], 90.00th=[ 46], 95.00th=[ 59], | 99.00th=[ 87], 99.50th=[ 104], 99.90th=[ 136], 99.95th=[ 167], | 99.99th=[ 167] bw ( KiB/s): min= 7, max= 224, per=25.73%, avg=65.86, stdev=41.59, samples=182 iops : min= 1, max= 56, avg=16.15, stdev=10.55, samples=182 write: IOPS=16, BW=66.0KiB/s (68.6kB/s)(6236KiB/93104msec); 0 zone resets clat (msec): min=14, max=1433, avg=41.76, stdev=41.45 lat (msec): min=14, max=1433, avg=41.76, stdev=41.45 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 21], 10.00th=[ 22], 20.00th=[ 26], | 30.00th=[ 28], 40.00th=[ 31], 50.00th=[ 34], 60.00th=[ 39], | 70.00th=[ 45], 80.00th=[ 54], 90.00th=[ 69], 95.00th=[ 82], | 99.00th=[ 125], 99.50th=[ 146], 99.90th=[ 243], 99.95th=[ 1435], | 99.99th=[ 1435] bw ( KiB/s): min= 23, max= 144, per=25.30%, avg=67.80, stdev=35.96, samples=182 iops : min= 5, max= 36, avg=16.63, stdev= 9.18, samples=182 lat (msec) : 4=6.41%, 10=18.03%, 20=12.11%, 50=47.79%, 100=14.16% lat (msec) : 250=1.46%, 2000=0.03% cpu : usr=0.05%, sys=8.92%, ctx=6058, 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=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=256KiB/s (262kB/s), 63.4KiB/s-65.0KiB/s (64.9kB/s-66.6kB/s), io=23.4MiB (24.6MB), run=93104-93758msec WRITE: bw=268KiB/s (275kB/s), 66.9KiB/s-67.7KiB/s (68.5kB/s-69.3kB/s), io=24.6MiB (25.7MB), run=93104-93758msec 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=150454: Tue Sep 8 12:03:09 2026 read: IOPS=20, BW=321KiB/s (328kB/s)(5920KiB/18459msec) clat (usec): min=33, max=127349, avg=25577.84, stdev=16547.23 lat (usec): min=33, max=127350, avg=25578.50, stdev=16547.22 clat percentiles (usec): | 1.00th=[ 108], 5.00th=[ 217], 10.00th=[ 6194], 20.00th=[ 13960], | 30.00th=[ 17957], 40.00th=[ 20841], 50.00th=[ 23200], 60.00th=[ 26870], | 70.00th=[ 30278], 80.00th=[ 36439], 90.00th=[ 43779], 95.00th=[ 51119], | 99.00th=[ 82314], 99.50th=[112722], 99.90th=[127402], 99.95th=[127402], | 99.99th=[127402] bw ( KiB/s): min= 127, max= 637, per=24.43%, avg=311.19, stdev=91.92, samples=36 iops : min= 7, max= 39, avg=18.92, stdev= 5.71, samples=36 write: IOPS=21, BW=345KiB/s (353kB/s)(6368KiB/18459msec); 0 zone resets clat (usec): min=971, max=143748, avg=22450.99, stdev=17118.70 lat (usec): min=972, max=143749, avg=22452.42, stdev=17118.47 clat percentiles (usec): | 1.00th=[ 1156], 5.00th=[ 3556], 10.00th=[ 5735], 20.00th=[ 8717], | 30.00th=[ 12125], 40.00th=[ 15795], 50.00th=[ 19006], 60.00th=[ 22152], | 70.00th=[ 26346], 80.00th=[ 32900], 90.00th=[ 44303], 95.00th=[ 54789], | 99.00th=[ 80217], 99.50th=[101188], 99.90th=[143655], 99.95th=[143655], | 99.99th=[143655] bw ( KiB/s): min= 159, max= 637, per=25.32%, avg=339.58, stdev=92.88, samples=36 iops : min= 9, max= 39, avg=20.69, stdev= 5.80, samples=36 lat (usec) : 50=0.26%, 100=0.13%, 250=2.99%, 500=0.78%, 1000=0.13% lat (msec) : 2=1.04%, 4=1.82%, 10=12.37%, 20=25.39%, 50=48.96% lat (msec) : 100=5.60%, 250=0.52% cpu : usr=0.08%, sys=29.98%, ctx=2799, 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=150455: Tue Sep 8 12:03:09 2026 read: IOPS=19, BW=316KiB/s (324kB/s)(5744KiB/18154msec) clat (usec): min=103, max=87673, avg=25116.95, stdev=13352.39 lat (usec): min=103, max=87674, avg=25117.58, stdev=13352.39 clat percentiles (usec): | 1.00th=[ 145], 5.00th=[ 217], 10.00th=[10159], 20.00th=[16581], | 30.00th=[19006], 40.00th=[21365], 50.00th=[24249], 60.00th=[26870], | 70.00th=[30278], 80.00th=[34866], 90.00th=[41157], 95.00th=[46924], | 99.00th=[68682], 99.50th=[82314], 99.90th=[87557], 99.95th=[87557], | 99.99th=[87557] bw ( KiB/s): min= 128, max= 448, per=24.62%, avg=313.66, stdev=76.19, samples=35 iops : min= 8, max= 28, avg=19.09, stdev= 4.77, samples=35 write: IOPS=22, BW=360KiB/s (369kB/s)(6544KiB/18154msec); 0 zone resets clat (usec): min=1223, max=100553, avg=22147.90, stdev=15037.36 lat (usec): min=1224, max=100555, avg=22149.64, stdev=15037.95 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 6], 10.00th=[ 8], 20.00th=[ 10], | 30.00th=[ 13], 40.00th=[ 16], 50.00th=[ 19], 60.00th=[ 23], | 70.00th=[ 27], 80.00th=[ 35], 90.00th=[ 43], 95.00th=[ 49], | 99.00th=[ 72], 99.50th=[ 81], 99.90th=[ 101], 99.95th=[ 101], | 99.99th=[ 101] bw ( KiB/s): min= 160, max= 576, per=26.37%, avg=353.63, stdev=88.61, samples=35 iops : min= 10, max= 36, avg=21.57, stdev= 5.57, samples=35 lat (usec) : 250=2.99%, 500=0.91% lat (msec) : 2=0.26%, 4=0.52%, 10=12.50%, 20=28.39%, 50=50.52% lat (msec) : 100=3.78%, 250=0.13% cpu : usr=0.10%, sys=31.98%, ctx=2911, 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=150456: Tue Sep 8 12:03:09 2026 read: IOPS=20, BW=333KiB/s (341kB/s)(6256KiB/18791msec) clat (usec): min=41, max=82156, avg=24783.61, stdev=13727.49 lat (usec): min=42, max=82156, avg=24784.36, stdev=13727.48 clat percentiles (usec): | 1.00th=[ 149], 5.00th=[ 245], 10.00th=[ 8455], 20.00th=[14091], | 30.00th=[17433], 40.00th=[20579], 50.00th=[23462], 60.00th=[26084], | 70.00th=[30278], 80.00th=[35390], 90.00th=[42730], 95.00th=[51119], | 99.00th=[64226], 99.50th=[76022], 99.90th=[82314], 99.95th=[82314], | 99.99th=[82314] bw ( KiB/s): min= 160, max= 928, per=25.96%, avg=330.70, stdev=136.96, samples=37 iops : min= 10, max= 58, avg=20.14, stdev= 8.62, samples=37 write: IOPS=20, BW=321KiB/s (329kB/s)(6032KiB/18791msec); 0 zone resets clat (usec): min=1055, max=142275, avg=24065.12, stdev=18878.94 lat (usec): min=1056, max=142277, avg=24066.51, stdev=18878.98 clat percentiles (usec): | 1.00th=[ 1369], 5.00th=[ 3916], 10.00th=[ 6063], 20.00th=[ 8979], | 30.00th=[ 11863], 40.00th=[ 15270], 50.00th=[ 19006], 60.00th=[ 23200], | 70.00th=[ 29230], 80.00th=[ 37487], 90.00th=[ 46924], 95.00th=[ 58459], | 99.00th=[ 88605], 99.50th=[104334], 99.90th=[141558], 99.95th=[141558], | 99.99th=[141558] bw ( KiB/s): min= 158, max= 832, per=23.35%, avg=313.14, stdev=115.64, samples=37 iops : min= 9, max= 52, avg=19.05, stdev= 7.26, samples=37 lat (usec) : 50=0.13%, 100=0.13%, 250=2.34%, 500=0.26% lat (msec) : 2=1.30%, 4=1.17%, 10=13.15%, 20=26.82%, 50=47.27% lat (msec) : 100=7.16%, 250=0.26% cpu : usr=0.05%, sys=29.78%, ctx=2958, 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=150457: Tue Sep 8 12:03:09 2026 read: IOPS=20, BW=332KiB/s (340kB/s)(6032KiB/18144msec) clat (usec): min=71, max=145295, avg=24760.44, stdev=14273.13 lat (usec): min=73, max=145296, avg=24761.28, stdev=14273.28 clat percentiles (usec): | 1.00th=[ 133], 5.00th=[ 210], 10.00th=[ 8455], 20.00th=[ 15139], | 30.00th=[ 18220], 40.00th=[ 21627], 50.00th=[ 24249], 60.00th=[ 26870], | 70.00th=[ 31065], 80.00th=[ 34866], 90.00th=[ 40109], 95.00th=[ 43779], | 99.00th=[ 63177], 99.50th=[ 74974], 99.90th=[145753], 99.95th=[145753], | 99.99th=[145753] bw ( KiB/s): min= 128, max= 576, per=25.42%, avg=323.83, stdev=98.74, samples=35 iops : min= 8, max= 36, avg=19.71, stdev= 6.19, samples=35 write: IOPS=21, BW=345KiB/s (353kB/s)(6256KiB/18144msec); 0 zone resets clat (usec): min=1334, max=126878, avg=22201.99, stdev=15301.13 lat (usec): min=1335, max=126879, avg=22203.49, stdev=15301.22 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 6], 10.00th=[ 8], 20.00th=[ 10], | 30.00th=[ 12], 40.00th=[ 16], 50.00th=[ 20], 60.00th=[ 23], | 70.00th=[ 28], 80.00th=[ 33], 90.00th=[ 43], 95.00th=[ 51], | 99.00th=[ 69], 99.50th=[ 83], 99.90th=[ 128], 99.95th=[ 128], | 99.99th=[ 128] bw ( KiB/s): min= 190, max= 576, per=25.22%, avg=338.14, stdev=91.15, samples=35 iops : min= 11, max= 36, avg=20.60, stdev= 5.72, samples=35 lat (usec) : 100=0.13%, 250=3.39%, 500=0.65% lat (msec) : 2=0.39%, 4=0.13%, 10=13.41%, 20=27.34%, 50=50.39% lat (msec) : 100=3.91%, 250=0.26% cpu : usr=0.10%, sys=32.22%, ctx=2909, 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=1275KiB/s (1305kB/s), 316KiB/s-333KiB/s (324kB/s-341kB/s), io=23.4MiB (24.5MB), run=18144-18791msec WRITE: bw=1341KiB/s (1373kB/s), 321KiB/s-360KiB/s (329kB/s-369kB/s), io=24.6MiB (25.8MB), run=18144-18791msec rand-rw: (groupid=0, jobs=1): err= 0: pid=150449: Tue Sep 8 12:03:15 2026 read: IOPS=14, BW=237KiB/s (243kB/s)(5920KiB/24954msec) clat (msec): min=3, max=116, avg=23.89, stdev=21.90 lat (msec): min=3, max=116, avg=23.89, stdev=21.90 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 5], 10.00th=[ 6], 20.00th=[ 8], | 30.00th=[ 11], 40.00th=[ 14], 50.00th=[ 16], 60.00th=[ 20], | 70.00th=[ 27], 80.00th=[ 36], 90.00th=[ 60], 95.00th=[ 75], | 99.00th=[ 97], 99.50th=[ 108], 99.90th=[ 117], 99.95th=[ 117], | 99.99th=[ 117] bw ( KiB/s): min= 95, max= 640, per=24.71%, avg=234.96, stdev=130.93, samples=49 iops : min= 5, max= 40, avg=14.20, stdev= 8.34, samples=49 write: IOPS=15, BW=255KiB/s (261kB/s)(6368KiB/24954msec); 0 zone resets clat (msec): min=15, max=135, avg=40.41, stdev=19.91 lat (msec): min=15, max=135, avg=40.41, stdev=19.91 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 21], 10.00th=[ 23], 20.00th=[ 26], | 30.00th=[ 29], 40.00th=[ 31], 50.00th=[ 36], 60.00th=[ 40], | 70.00th=[ 44], 80.00th=[ 53], 90.00th=[ 68], 95.00th=[ 83], | 99.00th=[ 123], 99.50th=[ 130], 99.90th=[ 136], 99.95th=[ 136], | 99.99th=[ 136] bw ( KiB/s): min= 64, max= 574, per=25.46%, avg=254.84, stdev=122.96, samples=49 iops : min= 4, max= 35, avg=15.45, stdev= 7.82, samples=49 lat (msec) : 4=1.56%, 10=12.37%, 20=18.36%, 50=50.00%, 100=16.41% lat (msec) : 250=1.30% cpu : usr=0.09%, sys=10.20%, ctx=1710, 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=150450: Tue Sep 8 12:03:15 2026 read: IOPS=14, BW=228KiB/s (234kB/s)(5744KiB/25164msec) clat (msec): min=3, max=166, avg=22.33, stdev=21.37 lat (msec): min=3, max=166, avg=22.34, stdev=21.37 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 5], 10.00th=[ 6], 20.00th=[ 8], | 30.00th=[ 10], 40.00th=[ 13], 50.00th=[ 16], 60.00th=[ 18], | 70.00th=[ 23], 80.00th=[ 33], 90.00th=[ 53], 95.00th=[ 71], | 99.00th=[ 103], 99.50th=[ 104], 99.90th=[ 167], 99.95th=[ 167], | 99.99th=[ 167] bw ( KiB/s): min= 32, max= 640, per=24.06%, avg=228.78, stdev=135.69, samples=49 iops : min= 2, max= 40, avg=13.82, stdev= 8.59, samples=49 write: IOPS=16, BW=260KiB/s (266kB/s)(6544KiB/25164msec); 0 zone resets clat (msec): min=14, max=165, avg=41.81, stdev=22.30 lat (msec): min=14, max=165, avg=41.81, stdev=22.30 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 20], 10.00th=[ 22], 20.00th=[ 26], | 30.00th=[ 29], 40.00th=[ 32], 50.00th=[ 35], 60.00th=[ 39], | 70.00th=[ 46], 80.00th=[ 57], 90.00th=[ 73], 95.00th=[ 86], | 99.00th=[ 126], 99.50th=[ 127], 99.90th=[ 165], 99.95th=[ 165], | 99.99th=[ 165] bw ( KiB/s): min= 95, max= 544, per=25.75%, avg=257.78, stdev=126.92, samples=49 iops : min= 5, max= 34, avg=15.63, stdev= 8.08, samples=49 lat (msec) : 4=0.91%, 10=13.28%, 20=19.53%, 50=48.18%, 100=16.02% lat (msec) : 250=2.08% cpu : usr=0.06%, sys=9.95%, ctx=1716, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=150451: Tue Sep 8 12:03:15 2026 read: IOPS=15, BW=251KiB/s (257kB/s)(6256KiB/24921msec) clat (msec): min=3, max=125, avg=22.39, stdev=21.29 lat (msec): min=3, max=125, avg=22.39, stdev=21.29 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 5], 10.00th=[ 6], 20.00th=[ 8], | 30.00th=[ 10], 40.00th=[ 12], 50.00th=[ 15], 60.00th=[ 19], | 70.00th=[ 24], 80.00th=[ 32], 90.00th=[ 55], 95.00th=[ 72], | 99.00th=[ 106], 99.50th=[ 115], 99.90th=[ 126], 99.95th=[ 126], | 99.99th=[ 126] bw ( KiB/s): min= 63, max= 800, per=26.63%, avg=253.20, stdev=172.66, samples=49 iops : min= 3, max= 50, avg=15.35, stdev=11.01, samples=49 write: IOPS=15, BW=242KiB/s (248kB/s)(6032KiB/24921msec); 0 zone resets clat (msec): min=15, max=168, avg=42.70, stdev=23.96 lat (msec): min=15, max=168, avg=42.70, stdev=23.96 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 19], 10.00th=[ 22], 20.00th=[ 24], | 30.00th=[ 28], 40.00th=[ 32], 50.00th=[ 37], 60.00th=[ 42], | 70.00th=[ 47], 80.00th=[ 56], 90.00th=[ 75], 95.00th=[ 92], | 99.00th=[ 134], 99.50th=[ 140], 99.90th=[ 169], 99.95th=[ 169], | 99.99th=[ 169] bw ( KiB/s): min= 95, max= 606, per=24.03%, avg=240.55, stdev=127.80, samples=49 iops : min= 5, max= 37, avg=14.55, stdev= 8.13, samples=49 lat (msec) : 4=0.91%, 10=15.63%, 20=20.44%, 50=44.01%, 100=16.67% lat (msec) : 250=2.34% cpu : usr=0.07%, sys=10.24%, ctx=1784, 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=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=150452: Tue Sep 8 12:03:15 2026 read: IOPS=15, BW=241KiB/s (246kB/s)(6032KiB/25079msec) clat (msec): min=3, max=130, avg=22.86, stdev=19.97 lat (msec): min=3, max=130, avg=22.86, stdev=19.97 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 5], 10.00th=[ 7], 20.00th=[ 9], | 30.00th=[ 12], 40.00th=[ 14], 50.00th=[ 16], 60.00th=[ 20], | 70.00th=[ 23], 80.00th=[ 33], 90.00th=[ 57], 95.00th=[ 68], | 99.00th=[ 87], 99.50th=[ 114], 99.90th=[ 131], 99.95th=[ 131], | 99.99th=[ 131] bw ( KiB/s): min= 31, max= 672, per=25.21%, avg=239.71, stdev=128.90, samples=49 iops : min= 1, max= 42, avg=14.51, stdev= 8.24, samples=49 write: IOPS=15, BW=249KiB/s (255kB/s)(6256KiB/25079msec); 0 zone resets clat (msec): min=16, max=147, avg=41.95, stdev=22.08 lat (msec): min=16, max=147, avg=41.95, stdev=22.07 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 20], 10.00th=[ 22], 20.00th=[ 25], | 30.00th=[ 28], 40.00th=[ 31], 50.00th=[ 36], 60.00th=[ 42], | 70.00th=[ 48], 80.00th=[ 56], 90.00th=[ 73], 95.00th=[ 87], | 99.00th=[ 128], 99.50th=[ 134], 99.90th=[ 148], 99.95th=[ 148], | 99.99th=[ 148] bw ( KiB/s): min= 95, max= 640, per=24.76%, avg=247.82, stdev=126.62, samples=49 iops : min= 5, max= 40, avg=15.02, stdev= 8.06, samples=49 lat (msec) : 4=1.04%, 10=11.72%, 20=20.96%, 50=47.66%, 100=17.06% lat (msec) : 250=1.56% cpu : usr=0.08%, sys=9.96%, ctx=1764, 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=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=952KiB/s (975kB/s), 228KiB/s-251KiB/s (234kB/s-257kB/s), io=23.4MiB (24.5MB), run=24921-25164msec WRITE: bw=1001KiB/s (1025kB/s), 242KiB/s-260KiB/s (248kB/s-266kB/s), io=24.6MiB (25.8MB), run=24921-25164msec 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=150467: Tue Sep 8 12:03:23 2026 read: IOPS=3, BW=3248KiB/s (3326kB/s)(7168KiB/2207msec) clat (msec): min=114, max=172, avg=145.20, stdev=19.83 lat (msec): min=114, max=172, avg=145.20, stdev=19.83 clat percentiles (msec): | 1.00th=[ 115], 5.00th=[ 115], 10.00th=[ 115], 20.00th=[ 133], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 146], 60.00th=[ 150], | 70.00th=[ 150], 80.00th=[ 165], 90.00th=[ 174], 95.00th=[ 174], | 99.00th=[ 174], 99.50th=[ 174], 99.90th=[ 174], 99.95th=[ 174], | 99.99th=[ 174] bw ( KiB/s): min= 2035, max= 6144, per=59.70%, avg=4088.67, stdev=2054.50, samples=3 iops : min= 1, max= 6, avg= 3.33, stdev= 2.52, samples=3 write: IOPS=2, BW=2320KiB/s (2376kB/s)(5120KiB/2207msec); 0 zone resets clat (msec): min=116, max=292, avg=218.96, stdev=70.23 lat (msec): min=116, max=292, avg=219.02, stdev=70.22 clat percentiles (msec): | 1.00th=[ 117], 5.00th=[ 117], 10.00th=[ 117], 20.00th=[ 117], | 30.00th=[ 197], 40.00th=[ 197], 50.00th=[ 215], 60.00th=[ 215], | 70.00th=[ 275], 80.00th=[ 275], 90.00th=[ 292], 95.00th=[ 292], | 99.00th=[ 292], 99.50th=[ 292], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 2035, max= 4096, per=28.43%, avg=2726.33, stdev=1186.18, samples=3 iops : min= 1, max= 4, avg= 2.33, stdev= 1.53, samples=3 lat (msec) : 250=83.33%, 500=16.67% cpu : usr=0.00%, sys=47.42%, ctx=1058, 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=150468: Tue Sep 8 12:03:23 2026 read: IOPS=0, BW=685KiB/s (701kB/s)(2048KiB/2990msec) clat (msec): min=103, max=124, avg=113.97, stdev=14.64 lat (msec): min=103, max=124, avg=113.97, stdev=14.64 clat percentiles (msec): | 1.00th=[ 104], 5.00th=[ 104], 10.00th=[ 104], 20.00th=[ 104], | 30.00th=[ 104], 40.00th=[ 104], 50.00th=[ 104], 60.00th=[ 125], | 70.00th=[ 125], 80.00th=[ 125], 90.00th=[ 125], 95.00th=[ 125], | 99.00th=[ 125], 99.50th=[ 125], 99.90th=[ 125], 99.95th=[ 125], | 99.99th=[ 125] bw ( KiB/s): min= 1896, max= 2035, per=28.70%, avg=1965.50, stdev=98.29, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=3, BW=3425KiB/s (3507kB/s)(10.0MiB/2990msec); 0 zone resets clat (msec): min=94, max=664, avg=274.54, stdev=184.50 lat (msec): min=94, max=664, avg=274.62, stdev=184.48 clat percentiles (msec): | 1.00th=[ 94], 5.00th=[ 94], 10.00th=[ 94], 20.00th=[ 101], | 30.00th=[ 159], 40.00th=[ 167], 50.00th=[ 184], 60.00th=[ 215], | 70.00th=[ 300], 80.00th=[ 384], 90.00th=[ 481], 95.00th=[ 667], | 99.00th=[ 667], 99.50th=[ 667], 99.90th=[ 667], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 1896, max= 4096, per=29.44%, avg=2822.80, stdev=1137.99, samples=5 iops : min= 1, max= 4, avg= 2.20, stdev= 1.30, samples=5 lat (msec) : 100=8.33%, 250=58.33%, 500=25.00%, 750=8.33% cpu : usr=0.00%, sys=33.56%, ctx=194, 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=150469: Tue Sep 8 12:03:23 2026 read: IOPS=2, BW=2870KiB/s (2939kB/s)(6144KiB/2141msec) clat (usec): min=581, max=298069, avg=126905.07, stdev=103098.83 lat (usec): min=581, max=298069, avg=126906.14, stdev=103098.69 clat percentiles (usec): | 1.00th=[ 578], 5.00th=[ 578], 10.00th=[ 578], 20.00th=[ 83362], | 30.00th=[ 83362], 40.00th=[ 86508], 50.00th=[ 86508], 60.00th=[103285], | 70.00th=[189793], 80.00th=[189793], 90.00th=[299893], 95.00th=[299893], | 99.00th=[299893], 99.50th=[299893], 99.90th=[299893], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 2048, max= 4096, per=49.72%, avg=3405.00, stdev=1175.26, samples=3 iops : min= 2, max= 4, avg= 3.00, stdev= 1.00, samples=3 write: IOPS=2, BW=2870KiB/s (2939kB/s)(6144KiB/2141msec); 0 zone resets clat (msec): min=115, max=345, avg=225.87, stdev=75.31 lat (msec): min=115, max=345, avg=225.95, stdev=75.36 clat percentiles (msec): | 1.00th=[ 116], 5.00th=[ 116], 10.00th=[ 116], 20.00th=[ 203], | 30.00th=[ 203], 40.00th=[ 205], 50.00th=[ 205], 60.00th=[ 239], | 70.00th=[ 251], 80.00th=[ 251], 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= 2048, max= 4071, per=31.54%, avg=3024.25, stdev=1128.75, samples=4 iops : min= 2, max= 3, avg= 2.50, stdev= 0.58, samples=4 lat (usec) : 750=8.33% lat (msec) : 100=16.67%, 250=50.00%, 500=25.00% cpu : usr=0.00%, sys=40.19%, ctx=427, 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=150471: Tue Sep 8 12:03:23 2026 read: IOPS=1, BW=1734KiB/s (1776kB/s)(5120KiB/2952msec) clat (usec): min=559, max=306823, avg=187000.01, stdev=123537.58 lat (usec): min=560, max=306823, avg=187000.96, stdev=123537.38 clat percentiles (usec): | 1.00th=[ 562], 5.00th=[ 562], 10.00th=[ 562], 20.00th=[ 562], | 30.00th=[149947], 40.00th=[149947], 50.00th=[189793], 60.00th=[189793], | 70.00th=[291505], 80.00th=[291505], 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= 4039, max= 4071, per=59.21%, avg=4055.00, stdev=22.63, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2428KiB/s (2486kB/s)(7168KiB/2952msec); 0 zone resets clat (msec): min=157, max=493, avg=273.14, stdev=128.15 lat (msec): min=157, max=493, avg=273.21, stdev=128.14 clat percentiles (msec): | 1.00th=[ 159], 5.00th=[ 159], 10.00th=[ 159], 20.00th=[ 165], | 30.00th=[ 186], 40.00th=[ 186], 50.00th=[ 230], 60.00th=[ 284], | 70.00th=[ 284], 80.00th=[ 397], 90.00th=[ 493], 95.00th=[ 493], | 99.00th=[ 493], 99.50th=[ 493], 99.90th=[ 493], 99.95th=[ 493], | 99.99th=[ 493] bw ( KiB/s): min= 4039, max= 4096, per=42.52%, avg=4077.00, stdev=32.91, samples=3 iops : min= 3, max= 4, avg= 3.67, stdev= 0.58, samples=3 lat (usec) : 750=8.33% lat (msec) : 250=50.00%, 500=41.67% cpu : usr=0.00%, sys=39.16%, ctx=564, 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=6849KiB/s (7014kB/s), 685KiB/s-3248KiB/s (701kB/s-3326kB/s), io=20.0MiB (20.0MB), run=2141-2990msec WRITE: bw=9589KiB/s (9819kB/s), 2320KiB/s-3425KiB/s (2376kB/s-3507kB/s), io=28.0MiB (29.4MB), run=2141-2990msec rand-rw: (groupid=0, jobs=1): err= 0: pid=150470: Tue Sep 8 12:03:24 2026 read: IOPS=3, BW=3559KiB/s (3645kB/s)(7168KiB/2014msec) clat (msec): min=47, max=343, avg=143.31, stdev=108.61 lat (msec): min=47, max=343, avg=143.31, stdev=108.61 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 48], 10.00th=[ 48], 20.00th=[ 62], | 30.00th=[ 79], 40.00th=[ 79], 50.00th=[ 94], 60.00th=[ 146], | 70.00th=[ 146], 80.00th=[ 234], 90.00th=[ 342], 95.00th=[ 342], | 99.00th=[ 342], 99.50th=[ 342], 99.90th=[ 342], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 2048, max= 7907, per=78.80%, avg=4977.50, stdev=4142.94, samples=2 iops : min= 2, max= 7, avg= 4.50, stdev= 3.54, samples=2 write: IOPS=2, BW=2542KiB/s (2603kB/s)(5120KiB/2014msec); 0 zone resets clat (msec): min=90, max=308, avg=196.13, stdev=77.20 lat (msec): min=90, max=308, avg=196.20, stdev=77.20 clat percentiles (msec): | 1.00th=[ 91], 5.00th=[ 91], 10.00th=[ 91], 20.00th=[ 91], | 30.00th=[ 188], 40.00th=[ 188], 50.00th=[ 197], 60.00th=[ 197], | 70.00th=[ 199], 80.00th=[ 199], 90.00th=[ 309], 95.00th=[ 309], | 99.00th=[ 309], 99.50th=[ 309], 99.90th=[ 309], 99.95th=[ 309], | 99.99th=[ 309] bw ( KiB/s): min= 1976, max= 4079, per=30.54%, avg=2701.00, stdev=1193.93, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 lat (msec) : 50=8.33%, 100=33.33%, 250=41.67%, 500=16.67% cpu : usr=0.00%, sys=14.31%, ctx=101, 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=150472: Tue Sep 8 12:03:24 2026 read: IOPS=0, BW=632KiB/s (647kB/s)(2048KiB/3242msec) clat (msec): min=214, max=284, avg=249.59, stdev=49.82 lat (msec): min=214, max=284, avg=249.59, stdev=49.82 clat percentiles (msec): | 1.00th=[ 215], 5.00th=[ 215], 10.00th=[ 215], 20.00th=[ 215], | 30.00th=[ 215], 40.00th=[ 215], 50.00th=[ 215], 60.00th=[ 284], | 70.00th=[ 284], 80.00th=[ 284], 90.00th=[ 284], 95.00th=[ 284], | 99.00th=[ 284], 99.50th=[ 284], 99.90th=[ 284], 99.95th=[ 284], | 99.99th=[ 284] bw ( KiB/s): min= 2007, max= 2027, per=31.93%, avg=2017.00, stdev=14.14, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=3, BW=3159KiB/s (3234kB/s)(10.0MiB/3242msec); 0 zone resets clat (msec): min=59, max=607, avg=263.47, stdev=168.83 lat (msec): min=59, max=607, avg=263.54, stdev=168.82 clat percentiles (msec): | 1.00th=[ 59], 5.00th=[ 59], 10.00th=[ 59], 20.00th=[ 81], | 30.00th=[ 159], 40.00th=[ 203], 50.00th=[ 228], 60.00th=[ 230], | 70.00th=[ 251], 80.00th=[ 380], 90.00th=[ 443], 95.00th=[ 609], | 99.00th=[ 609], 99.50th=[ 609], 99.90th=[ 609], 99.95th=[ 609], | 99.99th=[ 609] bw ( KiB/s): min= 4096, max= 6119, per=53.94%, avg=4770.33, stdev=1167.98, samples=3 iops : min= 4, max= 5, avg= 4.33, stdev= 0.58, samples=3 lat (msec) : 100=16.67%, 250=41.67%, 500=33.33%, 750=8.33% cpu : usr=0.03%, sys=16.91%, ctx=140, 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=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=150473: Tue Sep 8 12:03:24 2026 read: IOPS=1, BW=1958KiB/s (2005kB/s)(6144KiB/3138msec) clat (msec): min=52, max=419, avg=163.33, stdev=134.39 lat (msec): min=52, max=419, avg=163.33, stdev=134.39 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 54], 10.00th=[ 54], 20.00th=[ 64], | 30.00th=[ 64], 40.00th=[ 125], 50.00th=[ 125], 60.00th=[ 136], | 70.00th=[ 184], 80.00th=[ 184], 90.00th=[ 418], 95.00th=[ 418], | 99.00th=[ 418], 99.50th=[ 418], 99.90th=[ 418], 99.95th=[ 418], | 99.99th=[ 418] bw ( KiB/s): min= 2027, max= 4079, per=48.33%, avg=3053.00, stdev=1450.98, samples=2 iops : min= 1, max= 3, avg= 2.00, stdev= 1.41, samples=2 write: IOPS=1, BW=1958KiB/s (2005kB/s)(6144KiB/3138msec); 0 zone resets clat (msec): min=76, max=680, avg=344.79, stdev=237.70 lat (msec): min=76, max=680, avg=344.86, stdev=237.71 clat percentiles (msec): | 1.00th=[ 78], 5.00th=[ 78], 10.00th=[ 78], 20.00th=[ 155], | 30.00th=[ 155], 40.00th=[ 245], 50.00th=[ 245], 60.00th=[ 342], | 70.00th=[ 575], 80.00th=[ 575], 90.00th=[ 684], 95.00th=[ 684], | 99.00th=[ 684], 99.50th=[ 684], 99.90th=[ 684], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 2039, max= 2756, per=25.79%, avg=2281.00, stdev=411.39, samples=3 iops : min= 1, max= 2, avg= 1.67, stdev= 0.58, samples=3 lat (msec) : 100=25.00%, 250=41.67%, 500=16.67%, 750=16.67% cpu : usr=0.03%, sys=11.38%, ctx=235, 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=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=150474: Tue Sep 8 12:03:24 2026 read: IOPS=1, BW=1793KiB/s (1836kB/s)(5120KiB/2856msec) clat (msec): min=80, max=336, avg=195.32, stdev=115.04 lat (msec): min=80, max=336, avg=195.32, stdev=115.04 clat percentiles (msec): | 1.00th=[ 81], 5.00th=[ 81], 10.00th=[ 81], 20.00th=[ 81], | 30.00th=[ 102], 40.00th=[ 102], 50.00th=[ 163], 60.00th=[ 163], | 70.00th=[ 296], 80.00th=[ 296], 90.00th=[ 338], 95.00th=[ 338], | 99.00th=[ 338], 99.50th=[ 338], 99.90th=[ 338], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 4079, max= 4079, per=64.57%, avg=4079.00, stdev= 0.00, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2510KiB/s (2570kB/s)(7168KiB/2856msec); 0 zone resets clat (msec): min=131, max=522, avg=253.51, stdev=139.42 lat (msec): min=132, max=522, avg=253.59, stdev=139.45 clat percentiles (msec): | 1.00th=[ 132], 5.00th=[ 132], 10.00th=[ 132], 20.00th=[ 142], | 30.00th=[ 163], 40.00th=[ 163], 50.00th=[ 220], 60.00th=[ 259], | 70.00th=[ 259], 80.00th=[ 338], 90.00th=[ 523], 95.00th=[ 523], | 99.00th=[ 523], 99.50th=[ 523], 99.90th=[ 523], 99.95th=[ 523], | 99.99th=[ 523] bw ( KiB/s): min= 2019, max= 6083, per=40.25%, avg=3559.25, stdev=1944.30, samples=4 iops : min= 1, max= 5, avg= 2.75, stdev= 2.06, samples=4 lat (msec) : 100=8.33%, 250=50.00%, 500=33.33%, 750=8.33% cpu : usr=0.04%, sys=13.66%, ctx=110, 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=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=6317KiB/s (6469kB/s), 632KiB/s-3559KiB/s (647kB/s-3645kB/s), io=20.0MiB (20.0MB), run=2014-3242msec WRITE: bw=8844KiB/s (9056kB/s), 1958KiB/s-3159KiB/s (2005kB/s-3234kB/s), io=28.0MiB (29.4MB), run=2014-3242msec 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=150479: Tue Sep 8 12:03:32 2026 read: IOPS=1, BW=5324KiB/s (5452kB/s)(12.0MiB/2308msec) clat (msec): min=610, max=940, avg=742.43, stdev=175.01 lat (msec): min=610, max=940, avg=742.43, stdev=175.01 clat percentiles (msec): | 1.00th=[ 609], 5.00th=[ 609], 10.00th=[ 609], 20.00th=[ 609], | 30.00th=[ 609], 40.00th=[ 676], 50.00th=[ 676], 60.00th=[ 676], | 70.00th=[ 944], 80.00th=[ 944], 90.00th=[ 944], 95.00th=[ 944], | 99.00th=[ 944], 99.50th=[ 944], 99.90th=[ 944], 99.95th=[ 944], | 99.99th=[ 944] bw ( KiB/s): min= 8175, max= 8192, per=100.00%, avg=8183.50, stdev=12.02, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=5.50%, ctx=54, 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=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=150480: Tue Sep 8 12:03:32 2026 read: IOPS=0, BW=1265KiB/s (1295kB/s)(4096KiB/3238msec) clat (nsec): min=1059.0M, max=1059.0M, avg=1059993886.00, stdev= 0.00 lat (nsec): min=1059.0M, max=1059.0M, avg=1059996431.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1062], 5.00th=[ 1062], 10.00th=[ 1062], 20.00th=[ 1062], | 30.00th=[ 1062], 40.00th=[ 1062], 50.00th=[ 1062], 60.00th=[ 1062], | 70.00th=[ 1062], 80.00th=[ 1062], 90.00th=[ 1062], 95.00th=[ 1062], | 99.00th=[ 1062], 99.50th=[ 1062], 99.90th=[ 1062], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2530KiB/s (2591kB/s)(8192KiB/3238msec); 0 zone resets clat (msec): min=275, max=1876, avg=1076.17, stdev=1131.76 lat (msec): min=276, max=1876, avg=1076.50, stdev=1131.76 clat percentiles (msec): | 1.00th=[ 275], 5.00th=[ 275], 10.00th=[ 275], 20.00th=[ 275], | 30.00th=[ 275], 40.00th=[ 275], 50.00th=[ 275], 60.00th=[ 1871], | 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= 8192, max= 8192, per=80.96%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.49%, ctx=52, 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=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=150481: Tue Sep 8 12:03:32 2026 write: IOPS=2, BW=11.4MiB/s (11.0MB/s)(12.0MiB/1050msec); 0 zone resets clat (msec): min=225, max=534, avg=338.07, stdev=170.65 lat (msec): min=225, max=534, avg=338.40, stdev=170.53 clat percentiles (msec): | 1.00th=[ 226], 5.00th=[ 226], 10.00th=[ 226], 20.00th=[ 226], | 30.00th=[ 226], 40.00th=[ 255], 50.00th=[ 255], 60.00th=[ 255], | 70.00th=[ 535], 80.00th=[ 535], 90.00th=[ 535], 95.00th=[ 535], | 99.00th=[ 535], 99.50th=[ 535], 99.90th=[ 535], 99.95th=[ 535], | 99.99th=[ 535] bw ( KiB/s): min=11855, max=11855, per=100.00%, avg=11855.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 500=33.33%, 750=33.33% cpu : usr=0.00%, sys=13.25%, ctx=77, 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 rand-rw: (groupid=0, jobs=1): err= 0: pid=150483: Tue Sep 8 12:03:32 2026 write: IOPS=1, BW=5375KiB/s (5504kB/s)(12.0MiB/2286msec); 0 zone resets clat (msec): min=438, max=1329, avg=749.17, stdev=503.14 lat (msec): min=439, max=1330, avg=749.55, stdev=503.20 clat percentiles (msec): | 1.00th=[ 439], 5.00th=[ 439], 10.00th=[ 439], 20.00th=[ 439], | 30.00th=[ 439], 40.00th=[ 481], 50.00th=[ 481], 60.00th=[ 481], | 70.00th=[ 1334], 80.00th=[ 1334], 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= 7062, max= 8175, per=75.29%, avg=7618.50, stdev=787.01, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=66.67%, 2000=33.33% cpu : usr=0.00%, sys=5.03%, ctx=61, 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=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=5060KiB/s (5181kB/s), 1265KiB/s-5324KiB/s (1295kB/s-5452kB/s), io=16.0MiB (16.8MB), run=2308-3238msec WRITE: bw=9.88MiB/s (10.4MB/s), 2530KiB/s-11.4MiB/s (2591kB/s-11.0MB/s), io=32.0MiB (33.6MB), run=1050-3238msec rand-rw: (groupid=0, jobs=1): err= 0: pid=150484: Tue Sep 8 12:03:32 2026 read: IOPS=1, BW=5994KiB/s (6138kB/s)(12.0MiB/2050msec) clat (msec): min=533, max=673, avg=610.56, stdev=71.09 lat (msec): min=533, max=673, avg=610.57, stdev=71.09 clat percentiles (msec): | 1.00th=[ 535], 5.00th=[ 535], 10.00th=[ 535], 20.00th=[ 535], | 30.00th=[ 535], 40.00th=[ 625], 50.00th=[ 625], 60.00th=[ 625], | 70.00th=[ 676], 80.00th=[ 676], 90.00th=[ 676], 95.00th=[ 676], | 99.00th=[ 676], 99.50th=[ 676], 99.90th=[ 676], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 8000, max= 8078, per=100.00%, avg=8039.00, stdev=55.15, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=100.00% cpu : usr=0.00%, sys=18.59%, ctx=417, 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=150485: Tue Sep 8 12:03:32 2026 read: IOPS=0, BW=1589KiB/s (1628kB/s)(4096KiB/2577msec) clat (nsec): min=660900k, max=660900k, avg=660900238.00, stdev= 0.00 lat (nsec): min=660903k, max=660903k, avg=660903359.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 659], 5.00th=[ 659], 10.00th=[ 659], 20.00th=[ 659], | 30.00th=[ 659], 40.00th=[ 659], 50.00th=[ 659], 60.00th=[ 659], | 70.00th=[ 659], 80.00th=[ 659], 90.00th=[ 659], 95.00th=[ 659], | 99.00th=[ 659], 99.50th=[ 659], 99.90th=[ 659], 99.95th=[ 659], | 99.99th=[ 659] 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 write: IOPS=0, BW=3179KiB/s (3255kB/s)(8192KiB/2577msec); 0 zone resets clat (msec): min=777, max=1075, avg=926.17, stdev=210.50 lat (msec): min=777, max=1075, avg=926.53, stdev=210.44 clat percentiles (msec): | 1.00th=[ 776], 5.00th=[ 776], 10.00th=[ 776], 20.00th=[ 776], | 30.00th=[ 776], 40.00th=[ 776], 50.00th=[ 776], 60.00th=[ 1083], | 70.00th=[ 1083], 80.00th=[ 1083], 90.00th=[ 1083], 95.00th=[ 1083], | 99.00th=[ 1083], 99.50th=[ 1083], 99.90th=[ 1083], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 8078, max= 8078, per=78.67%, avg=8078.00, 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=0.08%, sys=9.28%, ctx=166, 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=150486: Tue Sep 8 12:03:32 2026 write: IOPS=0, BW=3851KiB/s (3943kB/s)(12.0MiB/3191msec); 0 zone resets clat (msec): min=323, max=2344, avg=1019.46, stdev=1148.20 lat (msec): min=327, max=2344, avg=1021.00, stdev=1147.05 clat percentiles (msec): | 1.00th=[ 326], 5.00th=[ 326], 10.00th=[ 326], 20.00th=[ 326], | 30.00th=[ 326], 40.00th=[ 388], 50.00th=[ 388], 60.00th=[ 388], | 70.00th=[ 2333], 80.00th=[ 2333], 90.00th=[ 2333], 95.00th=[ 2333], | 99.00th=[ 2333], 99.50th=[ 2333], 99.90th=[ 2333], 99.95th=[ 2333], | 99.99th=[ 2333] bw ( KiB/s): min= 8126, max= 8126, per=79.14%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=4.83%, ctx=68, 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=150487: Tue Sep 8 12:03:32 2026 write: IOPS=1, BW=5985KiB/s (6129kB/s)(12.0MiB/2053msec); 0 zone resets clat (msec): min=243, max=1402, avg=672.14, stdev=635.81 lat (msec): min=243, max=1403, avg=672.66, stdev=636.16 clat percentiles (msec): | 1.00th=[ 245], 5.00th=[ 245], 10.00th=[ 245], 20.00th=[ 245], | 30.00th=[ 245], 40.00th=[ 372], 50.00th=[ 372], 60.00th=[ 372], | 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=11770, max=11770, per=100.00%, avg=11770.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 500=33.33%, 2000=33.33% cpu : usr=0.05%, sys=7.16%, ctx=59, 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=6358KiB/s (6510kB/s), 1589KiB/s-5994KiB/s (1628kB/s-6138kB/s), io=16.0MiB (16.8MB), run=2050-2577msec WRITE: bw=10.0MiB/s (10.5MB/s), 3179KiB/s-5985KiB/s (3255kB/s-6129kB/s), io=32.0MiB (33.6MB), run=2053-3191msec