== sanity test 398b: DIO and buffer IO race ============== 13:55:49 (1790790949) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.9474 s, 8.5 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=174858: Wed Sep 30 13:58:33 2026 read: IOPS=10, BW=41.1KiB/s (42.1kB/s)(5992KiB/145738msec) clat (usec): min=32, max=586064, avg=46965.98, stdev=44618.25 lat (usec): min=32, max=586066, avg=46968.56, stdev=44617.83 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 62], 10.00th=[ 133], 20.00th=[ 20317], | 30.00th=[ 26346], 40.00th=[ 31851], 50.00th=[ 38011], 60.00th=[ 45351], | 70.00th=[ 54789], 80.00th=[ 67634], 90.00th=[ 90702], 95.00th=[112722], | 99.00th=[185598], 99.50th=[270533], 99.90th=[566232], 99.95th=[583009], | 99.99th=[583009] bw ( KiB/s): min= 6, max= 111, per=25.30%, avg=41.49, stdev=20.46, samples=281 iops : min= 1, max= 27, avg= 9.71, stdev= 5.16, samples=281 write: IOPS=10, BW=43.2KiB/s (44.2kB/s)(6296KiB/145738msec); 0 zone resets clat (usec): min=910, max=551375, avg=47755.72, stdev=52925.85 lat (usec): min=911, max=551388, avg=47758.19, stdev=52926.20 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1270], 10.00th=[ 1827], 20.00th=[ 4555], | 30.00th=[ 8979], 40.00th=[ 21103], 50.00th=[ 33162], 60.00th=[ 45351], | 70.00th=[ 60556], 80.00th=[ 81265], 90.00th=[115868], 95.00th=[145753], | 99.00th=[223347], 99.50th=[256902], 99.90th=[446694], 99.95th=[549454], | 99.99th=[549454] bw ( KiB/s): min= 7, max= 119, per=25.16%, avg=43.28, stdev=20.88, samples=283 iops : min= 1, max= 29, avg=10.16, stdev= 5.27, samples=283 lat (usec) : 50=0.59%, 100=3.97%, 250=0.62%, 500=0.03%, 1000=0.20% lat (msec) : 2=5.47%, 4=4.13%, 10=6.61%, 20=8.04%, 50=34.44% lat (msec) : 100=25.29%, 250=10.09%, 500=0.42%, 750=0.10% cpu : usr=0.08%, sys=5.01%, ctx=6558, 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=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=174859: Wed Sep 30 13:58:33 2026 read: IOPS=10, BW=41.6KiB/s (42.5kB/s)(5940KiB/142951msec) clat (usec): min=34, max=452609, avg=44935.52, stdev=38170.57 lat (usec): min=34, max=452611, avg=44942.30, stdev=38171.33 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 64], 10.00th=[ 105], 20.00th=[ 19006], | 30.00th=[ 24773], 40.00th=[ 31065], 50.00th=[ 37487], 60.00th=[ 45351], | 70.00th=[ 53740], 80.00th=[ 66323], 90.00th=[ 87557], 95.00th=[109577], | 99.00th=[175113], 99.50th=[210764], 99.90th=[396362], 99.95th=[450888], | 99.99th=[450888] bw ( KiB/s): min= 6, max= 102, per=25.63%, avg=42.03, stdev=20.88, samples=275 iops : min= 1, max= 25, avg= 9.84, stdev= 5.25, samples=275 write: IOPS=11, BW=44.4KiB/s (45.5kB/s)(6348KiB/142951msec); 0 zone resets clat (usec): min=943, max=510045, avg=47903.88, stdev=52916.60 lat (usec): min=944, max=510047, avg=47907.70, stdev=52915.12 clat percentiles (usec): | 1.00th=[ 1123], 5.00th=[ 1352], 10.00th=[ 1958], 20.00th=[ 4883], | 30.00th=[ 10421], 40.00th=[ 22938], 50.00th=[ 34341], 60.00th=[ 46400], | 70.00th=[ 61604], 80.00th=[ 79168], 90.00th=[110625], 95.00th=[143655], | 99.00th=[235930], 99.50th=[312476], 99.90th=[471860], 99.95th=[509608], | 99.99th=[509608] bw ( KiB/s): min= 7, max= 142, per=25.66%, avg=44.14, stdev=22.10, samples=280 iops : min= 1, max= 35, avg=10.37, stdev= 5.56, samples=280 lat (usec) : 50=0.65%, 100=4.10%, 250=0.59%, 500=0.13%, 750=0.10% lat (usec) : 1000=0.16% lat (msec) : 2=5.34%, 4=3.65%, 10=6.87%, 20=7.94%, 50=34.24% lat (msec) : 100=26.46%, 250=9.28%, 500=0.46%, 750=0.03% cpu : usr=0.07%, sys=5.12%, ctx=6394, 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=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=174860: Wed Sep 30 13:58:33 2026 read: IOPS=10, BW=41.0KiB/s (42.0kB/s)(6028KiB/143634msec) clat (usec): min=33, max=267208, avg=44717.72, stdev=36401.38 lat (usec): min=33, max=267210, avg=44720.34, stdev=36400.36 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 62], 10.00th=[ 99], 20.00th=[ 19268], | 30.00th=[ 25560], 40.00th=[ 31065], 50.00th=[ 36963], 60.00th=[ 43779], | 70.00th=[ 53216], 80.00th=[ 66323], 90.00th=[ 88605], 95.00th=[114820], | 99.00th=[185598], 99.50th=[202376], 99.90th=[254804], 99.95th=[267387], | 99.99th=[267387] bw ( KiB/s): min= 7, max= 96, per=25.87%, avg=42.42, stdev=21.56, samples=277 iops : min= 1, max= 24, avg= 9.94, stdev= 5.43, samples=277 write: IOPS=10, BW=43.6KiB/s (44.6kB/s)(6260KiB/143634msec); 0 zone resets clat (usec): min=842, max=536524, avg=48569.56, stdev=56039.97 lat (usec): min=843, max=536525, avg=48586.35, stdev=56052.74 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1287], 10.00th=[ 1827], 20.00th=[ 4359], | 30.00th=[ 9372], 40.00th=[ 20317], 50.00th=[ 32900], 60.00th=[ 45351], | 70.00th=[ 61080], 80.00th=[ 82314], 90.00th=[117965], 95.00th=[149947], | 99.00th=[261096], 99.50th=[295699], 99.90th=[505414], 99.95th=[534774], | 99.99th=[534774] bw ( KiB/s): min= 6, max= 118, per=25.32%, avg=43.54, stdev=20.89, samples=280 iops : min= 1, max= 29, avg=10.22, stdev= 5.27, samples=280 lat (usec) : 50=0.49%, 100=4.49%, 250=0.46%, 500=0.16%, 750=0.16% lat (usec) : 1000=0.07% lat (msec) : 2=5.53%, 4=3.91%, 10=6.48%, 20=8.69%, 50=34.57% lat (msec) : 100=23.80%, 250=10.51%, 500=0.62%, 750=0.07% cpu : usr=0.07%, sys=5.14%, ctx=6490, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=174861: Wed Sep 30 13:58:33 2026 read: IOPS=10, BW=42.3KiB/s (43.3kB/s)(6052KiB/142976msec) clat (usec): min=31, max=591421, avg=46092.01, stdev=41530.58 lat (usec): min=31, max=591423, avg=46094.14, stdev=41529.90 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 63], 10.00th=[ 453], 20.00th=[ 19792], | 30.00th=[ 25297], 40.00th=[ 30802], 50.00th=[ 36439], 60.00th=[ 44303], | 70.00th=[ 54789], 80.00th=[ 69731], 90.00th=[ 89654], 95.00th=[110625], | 99.00th=[200279], 99.50th=[231736], 99.90th=[566232], 99.95th=[591397], | 99.99th=[591397] bw ( KiB/s): min= 7, max= 104, per=26.00%, avg=42.64, stdev=20.92, samples=275 iops : min= 1, max= 26, avg= 9.99, stdev= 5.27, samples=275 write: IOPS=10, BW=43.6KiB/s (44.7kB/s)(6236KiB/142976msec); 0 zone resets clat (usec): min=979, max=741028, avg=46819.64, stdev=55438.11 lat (usec): min=980, max=741030, avg=46826.94, stdev=55444.99 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1270], 10.00th=[ 1745], 20.00th=[ 4555], | 30.00th=[ 8225], 40.00th=[ 18482], 50.00th=[ 30540], 60.00th=[ 43779], | 70.00th=[ 58983], 80.00th=[ 80217], 90.00th=[113771], 95.00th=[145753], | 99.00th=[231736], 99.50th=[287310], 99.90th=[467665], 99.95th=[742392], | 99.99th=[742392] bw ( KiB/s): min= 6, max= 120, per=25.33%, avg=43.57, stdev=21.36, samples=277 iops : min= 1, max= 30, avg=10.24, stdev= 5.38, samples=277 lat (usec) : 50=0.46%, 100=3.94%, 250=0.36%, 500=0.20%, 750=0.07% lat (usec) : 1000=0.10% lat (msec) : 2=5.66%, 4=3.81%, 10=7.52%, 20=9.02%, 50=33.82% lat (msec) : 100=25.10%, 250=9.38%, 500=0.49%, 750=0.10% cpu : usr=0.08%, sys=4.92%, ctx=6497, 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=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), 41.1KiB/s-42.3KiB/s (42.1kB/s-43.3kB/s), io=23.4MiB (24.6MB), run=142951-145738msec WRITE: bw=173KiB/s (177kB/s), 43.2KiB/s-44.4KiB/s (44.2kB/s-45.5kB/s), io=24.6MiB (25.7MB), run=142951-145738msec rand-rw: (groupid=0, jobs=1): err= 0: pid=174852: Wed Sep 30 14:01:43 2026 read: IOPS=4, BW=17.8KiB/s (18.2kB/s)(5992KiB/336977msec) clat (msec): min=6, max=967, avg=44.36, stdev=50.31 lat (msec): min=6, max=967, avg=44.36, stdev=50.31 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 22], 40.00th=[ 25], 50.00th=[ 31], 60.00th=[ 38], | 70.00th=[ 47], 80.00th=[ 62], 90.00th=[ 90], 95.00th=[ 120], | 99.00th=[ 207], 99.50th=[ 257], 99.90th=[ 735], 99.95th=[ 969], | 99.99th=[ 969] bw ( KiB/s): min= 7, max= 87, per=30.02%, avg=21.32, stdev=14.72, samples=539 iops : min= 1, max= 21, avg= 4.70, stdev= 3.72, samples=539 write: IOPS=4, BW=18.7KiB/s (19.1kB/s)(6296KiB/336977msec); 0 zone resets clat (msec): min=36, max=1117, avg=171.62, stdev=91.13 lat (msec): min=36, max=1117, avg=171.62, stdev=91.13 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 71], 10.00th=[ 84], 20.00th=[ 104], | 30.00th=[ 120], 40.00th=[ 136], 50.00th=[ 150], 60.00th=[ 174], | 70.00th=[ 194], 80.00th=[ 226], 90.00th=[ 279], 95.00th=[ 342], | 99.00th=[ 502], 99.50th=[ 609], 99.90th=[ 735], 99.95th=[ 1116], | 99.99th=[ 1116] bw ( KiB/s): min= 7, max= 47, per=25.29%, avg=18.72, stdev= 8.67, samples=641 iops : min= 1, max= 11, avg= 4.04, stdev= 2.21, samples=641 lat (msec) : 10=1.82%, 20=11.98%, 50=22.01%, 100=18.23%, 250=38.15% lat (msec) : 500=7.26%, 750=0.49%, 1000=0.03%, 2000=0.03% cpu : usr=0.03%, sys=1.03%, ctx=5357, 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=174853: Wed Sep 30 14:01:43 2026 read: IOPS=4, BW=17.7KiB/s (18.1kB/s)(5940KiB/336136msec) clat (msec): min=5, max=816, avg=42.18, stdev=41.91 lat (msec): min=5, max=816, avg=42.18, stdev=41.92 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 21], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 36], | 70.00th=[ 45], 80.00th=[ 58], 90.00th=[ 84], 95.00th=[ 114], | 99.00th=[ 194], 99.50th=[ 226], 99.90th=[ 430], 99.95th=[ 818], | 99.99th=[ 818] bw ( KiB/s): min= 7, max= 87, per=29.69%, avg=21.08, stdev=14.48, samples=541 iops : min= 1, max= 21, avg= 4.64, stdev= 3.64, samples=541 write: IOPS=4, BW=18.9KiB/s (19.3kB/s)(6348KiB/336136msec); 0 zone resets clat (msec): min=33, max=1311, avg=172.09, stdev=91.33 lat (msec): min=33, max=1311, avg=172.10, stdev=91.33 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 73], 10.00th=[ 85], 20.00th=[ 104], | 30.00th=[ 120], 40.00th=[ 136], 50.00th=[ 153], 60.00th=[ 171], | 70.00th=[ 197], 80.00th=[ 230], 90.00th=[ 288], 95.00th=[ 330], | 99.00th=[ 493], 99.50th=[ 575], 99.90th=[ 726], 99.95th=[ 1318], | 99.99th=[ 1318] bw ( KiB/s): min= 7, max= 56, per=25.34%, avg=18.75, stdev= 8.81, samples=647 iops : min= 1, max= 14, avg= 4.05, stdev= 2.25, samples=647 lat (msec) : 10=1.43%, 20=12.21%, 50=22.49%, 100=18.07%, 250=38.15% lat (msec) : 500=7.13%, 750=0.46%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.03%, ctx=5322, 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=174854: Wed Sep 30 14:01:43 2026 read: IOPS=4, BW=17.9KiB/s (18.4kB/s)(6028KiB/335934msec) clat (msec): min=6, max=669, avg=44.31, stdev=43.55 lat (msec): min=6, max=669, avg=44.31, stdev=43.55 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 39], | 70.00th=[ 47], 80.00th=[ 62], 90.00th=[ 92], 95.00th=[ 122], | 99.00th=[ 201], 99.50th=[ 255], 99.90th=[ 498], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 7, max= 119, per=29.40%, avg=20.88, stdev=14.40, samples=554 iops : min= 1, max= 29, avg= 4.59, stdev= 3.61, samples=554 write: IOPS=4, BW=18.6KiB/s (19.1kB/s)(6260KiB/335934msec); 0 zone resets clat (msec): min=37, max=931, avg=171.74, stdev=88.54 lat (msec): min=37, max=931, avg=171.75, stdev=88.54 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 73], 10.00th=[ 87], 20.00th=[ 105], | 30.00th=[ 123], 40.00th=[ 138], 50.00th=[ 155], 60.00th=[ 174], | 70.00th=[ 194], 80.00th=[ 224], 90.00th=[ 275], 95.00th=[ 326], | 99.00th=[ 477], 99.50th=[ 634], 99.90th=[ 911], 99.95th=[ 936], | 99.99th=[ 936] bw ( KiB/s): min= 7, max= 64, per=24.81%, avg=18.36, stdev= 8.98, samples=650 iops : min= 1, max= 16, avg= 3.95, stdev= 2.29, samples=650 lat (msec) : 10=1.60%, 20=11.98%, 50=22.23%, 100=17.81%, 250=38.80% lat (msec) : 500=7.13%, 750=0.36%, 1000=0.10% cpu : usr=0.04%, sys=1.08%, ctx=5312, 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=174855: Wed Sep 30 14:01:43 2026 read: IOPS=4, BW=18.1KiB/s (18.5kB/s)(6052KiB/334775msec) clat (msec): min=5, max=713, avg=43.15, stdev=43.49 lat (msec): min=5, max=713, avg=43.15, stdev=43.49 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 25], 50.00th=[ 30], 60.00th=[ 36], | 70.00th=[ 46], 80.00th=[ 59], 90.00th=[ 93], 95.00th=[ 124], | 99.00th=[ 197], 99.50th=[ 226], 99.90th=[ 435], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 7, max= 87, per=30.60%, avg=21.72, stdev=14.71, samples=535 iops : min= 1, max= 21, avg= 4.79, stdev= 3.71, samples=535 write: IOPS=4, BW=18.6KiB/s (19.1kB/s)(6236KiB/334775msec); 0 zone resets clat (msec): min=36, max=1311, avg=172.60, stdev=92.63 lat (msec): min=36, max=1311, avg=172.60, stdev=92.64 clat percentiles (msec): | 1.00th=[ 55], 5.00th=[ 70], 10.00th=[ 84], 20.00th=[ 104], | 30.00th=[ 122], 40.00th=[ 138], 50.00th=[ 153], 60.00th=[ 169], | 70.00th=[ 197], 80.00th=[ 230], 90.00th=[ 284], 95.00th=[ 338], | 99.00th=[ 472], 99.50th=[ 550], 99.90th=[ 894], 99.95th=[ 1318], | 99.99th=[ 1318] bw ( KiB/s): min= 7, max= 64, per=24.94%, avg=18.46, stdev= 9.18, samples=645 iops : min= 1, max= 16, avg= 3.97, stdev= 2.35, samples=645 lat (msec) : 10=2.31%, 20=12.11%, 50=22.14%, 100=17.84%, 250=37.57% lat (msec) : 500=7.62%, 750=0.36%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.06%, ctx=5339, 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=71.3KiB/s (72.0kB/s), 17.7KiB/s-18.1KiB/s (18.1kB/s-18.5kB/s), io=23.4MiB (24.6MB), run=334775-336977msec WRITE: bw=74.6KiB/s (76.4kB/s), 18.6KiB/s-18.9KiB/s (19.1kB/s-19.3kB/s), io=24.6MiB (25.7MB), run=334775-336977msec 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=174933: Wed Sep 30 14:02:30 2026 read: IOPS=10, BW=167KiB/s (171kB/s)(5920KiB/35417msec) clat (usec): min=37, max=484880, avg=51468.79, stdev=49176.83 lat (usec): min=37, max=484881, avg=51469.92, stdev=49176.89 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 55], 10.00th=[ 61], 20.00th=[ 104], | 30.00th=[ 26346], 40.00th=[ 37487], 50.00th=[ 45351], 60.00th=[ 54789], | 70.00th=[ 65799], 80.00th=[ 79168], 90.00th=[102237], 95.00th=[135267], | 99.00th=[200279], 99.50th=[278922], 99.90th=[484443], 99.95th=[484443], | 99.99th=[484443] bw ( KiB/s): min= 31, max= 415, per=25.08%, avg=167.00, stdev=84.20, samples=69 iops : min= 1, max= 25, avg= 9.71, stdev= 5.33, samples=69 write: IOPS=11, BW=180KiB/s (184kB/s)(6368KiB/35417msec); 0 zone resets clat (usec): min=1336, max=386589, avg=40306.80, stdev=47966.30 lat (usec): min=1339, max=386591, avg=40315.73, stdev=47962.35 clat percentiles (usec): | 1.00th=[ 1434], 5.00th=[ 1713], 10.00th=[ 2278], 20.00th=[ 5538], | 30.00th=[ 8356], 40.00th=[ 14222], 50.00th=[ 20317], 60.00th=[ 33817], | 70.00th=[ 46400], 80.00th=[ 69731], 90.00th=[115868], 95.00th=[132645], | 99.00th=[212861], 99.50th=[246416], 99.90th=[387974], 99.95th=[387974], | 99.99th=[387974] bw ( KiB/s): min= 31, max= 414, per=26.05%, avg=182.59, stdev=89.22, samples=68 iops : min= 1, max= 25, avg=10.69, stdev= 5.62, samples=68 lat (usec) : 50=1.82%, 100=7.55%, 250=1.30%, 500=0.26% lat (msec) : 2=4.56%, 4=4.17%, 10=8.98%, 20=9.11%, 50=25.91% lat (msec) : 100=24.87%, 250=11.07%, 500=0.39% cpu : usr=0.09%, sys=5.15%, ctx=1416, 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=174934: Wed Sep 30 14:02:30 2026 read: IOPS=9, BW=160KiB/s (164kB/s)(5744KiB/35947msec) clat (usec): min=40, max=451852, avg=52712.59, stdev=51876.90 lat (usec): min=40, max=451852, avg=52714.11, stdev=51876.90 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 58], 10.00th=[ 63], 20.00th=[ 437], | 30.00th=[ 31065], 40.00th=[ 38536], 50.00th=[ 45351], 60.00th=[ 56361], | 70.00th=[ 64750], 80.00th=[ 80217], 90.00th=[ 93848], 95.00th=[127402], | 99.00th=[263193], 99.50th=[379585], 99.90th=[450888], 99.95th=[450888], | 99.99th=[450888] bw ( KiB/s): min= 31, max= 341, per=23.98%, avg=159.71, stdev=70.75, samples=70 iops : min= 1, max= 21, avg= 9.23, stdev= 4.48, samples=70 write: IOPS=11, BW=182KiB/s (186kB/s)(6544KiB/35947msec); 0 zone resets clat (usec): min=1381, max=366006, avg=41366.42, stdev=48632.54 lat (usec): min=1383, max=366008, avg=41368.48, stdev=48632.44 clat percentiles (usec): | 1.00th=[ 1450], 5.00th=[ 1729], 10.00th=[ 2073], 20.00th=[ 5604], | 30.00th=[ 9372], 40.00th=[ 14091], 50.00th=[ 23462], 60.00th=[ 34866], | 70.00th=[ 51643], 80.00th=[ 70779], 90.00th=[104334], 95.00th=[133694], | 99.00th=[240124], 99.50th=[261096], 99.90th=[367002], 99.95th=[367002], | 99.99th=[367002] bw ( KiB/s): min= 30, max= 350, per=26.35%, avg=184.68, stdev=86.34, samples=69 iops : min= 1, max= 21, avg=10.80, stdev= 5.45, samples=69 lat (usec) : 50=1.17%, 100=7.16%, 250=0.78%, 500=0.26% lat (msec) : 2=5.34%, 4=3.12%, 10=8.85%, 20=8.85%, 50=26.56% lat (msec) : 100=27.60%, 250=9.24%, 500=1.04% cpu : usr=0.08%, sys=4.73%, ctx=1332, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=174935: Wed Sep 30 14:02:30 2026 read: IOPS=10, BW=176KiB/s (180kB/s)(6256KiB/35619msec) clat (usec): min=35, max=381415, avg=48633.37, stdev=43599.78 lat (usec): min=35, max=381416, avg=48634.79, stdev=43599.70 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 57], 10.00th=[ 64], 20.00th=[ 98], | 30.00th=[ 28443], 40.00th=[ 36963], 50.00th=[ 45351], 60.00th=[ 53740], | 70.00th=[ 62653], 80.00th=[ 73925], 90.00th=[ 94897], 95.00th=[116917], | 99.00th=[189793], 99.50th=[337642], 99.90th=[379585], 99.95th=[379585], | 99.99th=[379585] bw ( KiB/s): min= 61, max= 377, per=26.56%, avg=176.87, stdev=72.61, samples=69 iops : min= 3, max= 23, avg=10.33, stdev= 4.61, samples=69 write: IOPS=10, BW=169KiB/s (173kB/s)(6032KiB/35619msec); 0 zone resets clat (usec): min=1440, max=230906, avg=43413.75, stdev=44636.20 lat (usec): min=1441, max=230908, avg=43416.38, stdev=44636.21 clat percentiles (usec): | 1.00th=[ 1549], 5.00th=[ 1729], 10.00th=[ 1991], 20.00th=[ 6456], | 30.00th=[ 10290], 40.00th=[ 16188], 50.00th=[ 26346], 60.00th=[ 39584], | 70.00th=[ 57934], 80.00th=[ 82314], 90.00th=[101188], 95.00th=[128451], | 99.00th=[200279], 99.50th=[227541], 99.90th=[231736], 99.95th=[231736], | 99.99th=[231736] bw ( KiB/s): min= 31, max= 416, per=24.34%, avg=170.63, stdev=73.83, samples=68 iops : min= 1, max= 26, avg= 9.94, stdev= 4.68, samples=68 lat (usec) : 50=1.43%, 100=8.85%, 250=0.78%, 1000=0.13% lat (msec) : 2=5.08%, 4=2.08%, 10=7.29%, 20=7.94%, 50=27.08% lat (msec) : 100=29.82%, 250=9.24%, 500=0.26% cpu : usr=0.06%, sys=4.95%, ctx=1395, 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=174936: Wed Sep 30 14:02:30 2026 read: IOPS=10, BW=175KiB/s (179kB/s)(6032KiB/34464msec) clat (usec): min=39, max=313540, avg=48049.98, stdev=41220.59 lat (usec): min=39, max=313541, avg=48051.85, stdev=41220.65 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 58], 10.00th=[ 65], 20.00th=[ 131], | 30.00th=[ 27657], 40.00th=[ 36439], 50.00th=[ 44827], 60.00th=[ 52691], | 70.00th=[ 61080], 80.00th=[ 76022], 90.00th=[ 99091], 95.00th=[123208], | 99.00th=[179307], 99.50th=[208667], 99.90th=[312476], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 31, max= 350, per=25.87%, avg=172.31, stdev=70.16, samples=67 iops : min= 1, max= 21, avg=10.04, stdev= 4.44, samples=67 write: IOPS=11, BW=182KiB/s (186kB/s)(6256KiB/34464msec); 0 zone resets clat (usec): min=1348, max=365089, avg=41194.89, stdev=50145.38 lat (usec): min=1350, max=365090, avg=41197.33, stdev=50145.69 clat percentiles (usec): | 1.00th=[ 1434], 5.00th=[ 1680], 10.00th=[ 1991], 20.00th=[ 5604], | 30.00th=[ 9503], 40.00th=[ 13960], 50.00th=[ 23200], 60.00th=[ 32113], | 70.00th=[ 48497], 80.00th=[ 71828], 90.00th=[102237], 95.00th=[130548], | 99.00th=[258999], 99.50th=[316670], 99.90th=[367002], 99.95th=[367002], | 99.99th=[367002] bw ( KiB/s): min= 31, max= 396, per=25.59%, avg=179.37, stdev=81.24, samples=67 iops : min= 1, max= 24, avg=10.49, stdev= 5.16, samples=67 lat (usec) : 50=1.17%, 100=8.07%, 250=0.65%, 500=0.26%, 750=0.13% lat (usec) : 1000=0.26% lat (msec) : 2=5.21%, 4=3.39%, 10=8.20%, 20=10.55%, 50=25.78% lat (msec) : 100=26.30%, 250=9.38%, 500=0.65% cpu : usr=0.10%, sys=4.77%, ctx=1379, 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=666KiB/s (682kB/s), 160KiB/s-176KiB/s (164kB/s-180kB/s), io=23.4MiB (24.5MB), run=34464-35947msec WRITE: bw=701KiB/s (718kB/s), 169KiB/s-182KiB/s (173kB/s-186kB/s), io=24.6MiB (25.8MB), run=34464-35947msec rand-rw: (groupid=0, jobs=1): err= 0: pid=174938: Wed Sep 30 14:03:18 2026 read: IOPS=4, BW=71.3KiB/s (72.0kB/s)(5920KiB/83046msec) clat (msec): min=7, max=317, avg=44.35, stdev=49.06 lat (msec): min=7, max=317, avg=44.35, stdev=49.06 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 33], | 70.00th=[ 41], 80.00th=[ 55], 90.00th=[ 97], 95.00th=[ 155], | 99.00th=[ 275], 99.50th=[ 284], 99.90th=[ 317], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 30, max= 256, per=29.44%, avg=84.19, stdev=53.05, samples=138 iops : min= 1, max= 16, avg= 4.51, stdev= 3.38, samples=138 write: IOPS=4, BW=76.7KiB/s (78.5kB/s)(6368KiB/83046msec); 0 zone resets clat (msec): min=53, max=628, avg=167.23, stdev=89.86 lat (msec): min=53, max=628, avg=167.23, stdev=89.86 clat percentiles (msec): | 1.00th=[ 59], 5.00th=[ 77], 10.00th=[ 87], 20.00th=[ 101], | 30.00th=[ 113], 40.00th=[ 127], 50.00th=[ 142], 60.00th=[ 159], | 70.00th=[ 178], 80.00th=[ 215], 90.00th=[ 305], 95.00th=[ 342], | 99.00th=[ 531], 99.50th=[ 567], 99.90th=[ 625], 99.95th=[ 625], | 99.99th=[ 625] bw ( KiB/s): min= 30, max= 192, per=26.37%, avg=79.11, stdev=38.95, samples=158 iops : min= 1, max= 12, avg= 4.20, stdev= 2.55, samples=158 lat (msec) : 10=1.43%, 20=13.02%, 50=23.05%, 100=16.15%, 250=38.15% lat (msec) : 500=7.55%, 750=0.65% cpu : usr=0.04%, sys=1.05%, ctx=1344, 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=174939: Wed Sep 30 14:03:18 2026 read: IOPS=4, BW=68.6KiB/s (70.2kB/s)(5744KiB/83748msec) clat (msec): min=6, max=350, avg=44.40, stdev=50.70 lat (msec): min=6, max=350, avg=44.41, stdev=50.70 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 31], | 70.00th=[ 39], 80.00th=[ 61], 90.00th=[ 96], 95.00th=[ 144], | 99.00th=[ 255], 99.50th=[ 292], 99.90th=[ 351], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 30, max= 320, per=30.41%, avg=86.96, stdev=59.95, samples=129 iops : min= 1, max= 20, avg= 4.70, stdev= 3.81, samples=129 write: IOPS=4, BW=78.1KiB/s (80.0kB/s)(6544KiB/83748msec); 0 zone resets clat (msec): min=60, max=631, avg=165.57, stdev=86.89 lat (msec): min=60, max=631, avg=165.58, stdev=86.89 clat percentiles (msec): | 1.00th=[ 66], 5.00th=[ 74], 10.00th=[ 86], 20.00th=[ 101], | 30.00th=[ 115], 40.00th=[ 129], 50.00th=[ 142], 60.00th=[ 159], | 70.00th=[ 180], 80.00th=[ 213], 90.00th=[ 288], 95.00th=[ 338], | 99.00th=[ 468], 99.50th=[ 523], 99.90th=[ 634], 99.95th=[ 634], | 99.99th=[ 634] bw ( KiB/s): min= 30, max= 190, per=27.11%, avg=81.32, stdev=37.64, samples=158 iops : min= 1, max= 11, avg= 4.35, stdev= 2.45, samples=158 lat (msec) : 10=0.78%, 20=13.67%, 50=21.48%, 100=16.80%, 250=39.06% lat (msec) : 500=7.81%, 750=0.39% cpu : usr=0.04%, sys=1.01%, ctx=1281, 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=174940: Wed Sep 30 14:03:18 2026 read: IOPS=4, BW=78.5KiB/s (80.4kB/s)(6256KiB/79697msec) clat (msec): min=5, max=326, avg=41.88, stdev=46.16 lat (msec): min=5, max=326, avg=41.88, stdev=46.16 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 32], | 70.00th=[ 37], 80.00th=[ 50], 90.00th=[ 90], 95.00th=[ 132], | 99.00th=[ 288], 99.50th=[ 313], 99.90th=[ 326], 99.95th=[ 326], | 99.99th=[ 326] bw ( KiB/s): min= 31, max= 320, per=33.24%, avg=95.05, stdev=66.99, samples=130 iops : min= 1, max= 20, avg= 5.20, stdev= 4.28, samples=130 write: IOPS=4, BW=75.7KiB/s (77.5kB/s)(6032KiB/79697msec); 0 zone resets clat (msec): min=56, max=724, avg=167.74, stdev=92.17 lat (msec): min=56, max=724, avg=167.74, stdev=92.17 clat percentiles (msec): | 1.00th=[ 63], 5.00th=[ 77], 10.00th=[ 87], 20.00th=[ 100], | 30.00th=[ 114], 40.00th=[ 129], 50.00th=[ 140], 60.00th=[ 157], | 70.00th=[ 186], 80.00th=[ 218], 90.00th=[ 292], 95.00th=[ 347], | 99.00th=[ 531], 99.50th=[ 592], 99.90th=[ 726], 99.95th=[ 726], | 99.99th=[ 726] bw ( KiB/s): min= 30, max= 160, per=26.42%, avg=79.26, stdev=34.59, samples=149 iops : min= 1, max= 10, avg= 4.20, stdev= 2.26, samples=149 lat (msec) : 10=1.43%, 20=15.23%, 50=24.35%, 100=16.02%, 250=35.29% lat (msec) : 500=7.03%, 750=0.65% cpu : usr=0.04%, sys=1.05%, ctx=1360, 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=174941: Wed Sep 30 14:03:18 2026 read: IOPS=4, BW=72.7KiB/s (74.5kB/s)(6032KiB/82924msec) clat (msec): min=8, max=351, avg=42.51, stdev=46.68 lat (msec): min=8, max=351, avg=42.52, stdev=46.68 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 31], | 70.00th=[ 39], 80.00th=[ 54], 90.00th=[ 94], 95.00th=[ 136], | 99.00th=[ 245], 99.50th=[ 288], 99.90th=[ 351], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 30, max= 287, per=30.56%, avg=87.41, stdev=62.45, samples=134 iops : min= 1, max= 17, avg= 4.73, stdev= 4.02, samples=134 write: IOPS=4, BW=75.4KiB/s (77.3kB/s)(6256KiB/82924msec); 0 zone resets clat (msec): min=51, max=722, avg=171.02, stdev=98.82 lat (msec): min=51, max=722, avg=171.03, stdev=98.82 clat percentiles (msec): | 1.00th=[ 60], 5.00th=[ 73], 10.00th=[ 83], 20.00th=[ 101], | 30.00th=[ 111], 40.00th=[ 127], 50.00th=[ 144], 60.00th=[ 159], | 70.00th=[ 182], 80.00th=[ 234], 90.00th=[ 309], 95.00th=[ 355], | 99.00th=[ 575], 99.50th=[ 634], 99.90th=[ 726], 99.95th=[ 726], | 99.99th=[ 726] bw ( KiB/s): min= 30, max= 192, per=26.15%, avg=78.46, stdev=38.66, samples=156 iops : min= 1, max= 12, avg= 4.16, stdev= 2.54, samples=156 lat (msec) : 10=0.91%, 20=15.10%, 50=22.14%, 100=16.93%, 250=36.20% lat (msec) : 500=8.07%, 750=0.65% cpu : usr=0.03%, sys=1.01%, ctx=1375, 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=286KiB/s (293kB/s), 68.6KiB/s-78.5KiB/s (70.2kB/s-80.4kB/s), io=23.4MiB (24.5MB), run=79697-83748msec WRITE: bw=301KiB/s (308kB/s), 75.4KiB/s-78.1KiB/s (77.3kB/s-80.0kB/s), io=24.6MiB (25.8MB), run=79697-83748msec 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=174966: Wed Sep 30 14:03:35 2026 read: IOPS=1, BW=1215KiB/s (1244kB/s)(7168KiB/5902msec) clat (usec): min=374, max=4597.4k, avg=757651.65, stdev=1697461.83 lat (usec): min=374, max=4597.4k, avg=757652.99, stdev=1697462.18 clat percentiles (usec): | 1.00th=[ 375], 5.00th=[ 375], 10.00th=[ 375], | 20.00th=[ 644], 30.00th=[ 660], 40.00th=[ 660], | 50.00th=[ 181404], 60.00th=[ 240124], 70.00th=[ 240124], | 80.00th=[ 283116], 90.00th=[4596958], 95.00th=[4596958], | 99.00th=[4596958], 99.50th=[4596958], 99.90th=[4596958], | 99.95th=[4596958], 99.99th=[4596958] bw ( KiB/s): min= 3820, max= 6047, per=100.00%, avg=4933.50, stdev=1574.73, samples=2 iops : min= 3, max= 5, avg= 4.00, stdev= 1.41, samples=2 write: IOPS=0, BW=868KiB/s (888kB/s)(5120KiB/5902msec); 0 zone resets clat (msec): min=79, max=237, avg=119.21, stdev=66.81 lat (msec): min=79, max=237, avg=119.29, stdev=66.81 clat percentiles (msec): | 1.00th=[ 81], 5.00th=[ 81], 10.00th=[ 81], 20.00th=[ 81], | 30.00th=[ 85], 40.00th=[ 85], 50.00th=[ 92], 60.00th=[ 92], | 70.00th=[ 103], 80.00th=[ 103], 90.00th=[ 239], 95.00th=[ 239], | 99.00th=[ 239], 99.50th=[ 239], 99.90th=[ 239], 99.95th=[ 239], | 99.99th=[ 239] bw ( KiB/s): min= 6047, max= 6047, per=100.00%, avg=6047.00, stdev= 0.00, samples=1 iops : min= 5, max= 5, avg= 5.00, stdev= 0.00, samples=1 lat (usec) : 500=8.33%, 750=16.67% lat (msec) : 100=25.00%, 250=33.33%, 500=8.33%, >=2000=8.33% cpu : usr=0.03%, sys=7.81%, ctx=512, 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=174967: Wed Sep 30 14:03:35 2026 read: IOPS=0, BW=291KiB/s (298kB/s)(2048KiB/7039msec) clat (msec): min=72, max=640, avg=356.53, stdev=401.76 lat (msec): min=72, max=640, avg=356.53, stdev=401.76 clat percentiles (msec): | 1.00th=[ 73], 5.00th=[ 73], 10.00th=[ 73], 20.00th=[ 73], | 30.00th=[ 73], 40.00th=[ 73], 50.00th=[ 73], 60.00th=[ 642], | 70.00th=[ 642], 80.00th=[ 642], 90.00th=[ 642], 95.00th=[ 642], | 99.00th=[ 642], 99.50th=[ 642], 99.90th=[ 642], 99.95th=[ 642], | 99.99th=[ 642] bw ( KiB/s): min= 2019, max= 2048, per=69.90%, avg=2033.50, stdev=20.51, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 write: IOPS=1, BW=1455KiB/s (1490kB/s)(10.0MiB/7039msec); 0 zone resets clat (msec): min=150, max=3196, avg=631.19, stdev=914.17 lat (msec): min=150, max=3196, avg=632.49, stdev=913.89 clat percentiles (msec): | 1.00th=[ 150], 5.00th=[ 150], 10.00th=[ 150], 20.00th=[ 203], | 30.00th=[ 209], 40.00th=[ 264], 50.00th=[ 313], 60.00th=[ 409], | 70.00th=[ 443], 80.00th=[ 481], 90.00th=[ 651], 95.00th=[ 3205], | 99.00th=[ 3205], 99.50th=[ 3205], 99.90th=[ 3205], 99.95th=[ 3205], | 99.99th=[ 3205] bw ( KiB/s): min= 2019, max= 6144, per=80.08%, avg=3261.60, stdev=1839.79, samples=5 iops : min= 1, max= 6, avg= 2.40, stdev= 2.19, samples=5 lat (msec) : 100=8.33%, 250=25.00%, 500=41.67%, 750=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=7.70%, ctx=177, 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=174968: Wed Sep 30 14:03:35 2026 read: IOPS=0, BW=983KiB/s (1006kB/s)(6144KiB/6251msec) clat (msec): min=195, max=391, avg=271.73, stdev=68.54 lat (msec): min=195, max=391, avg=271.73, stdev=68.54 clat percentiles (msec): | 1.00th=[ 197], 5.00th=[ 197], 10.00th=[ 197], 20.00th=[ 241], | 30.00th=[ 241], 40.00th=[ 245], 50.00th=[ 245], 60.00th=[ 249], | 70.00th=[ 309], 80.00th=[ 309], 90.00th=[ 393], 95.00th=[ 393], | 99.00th=[ 393], 99.50th=[ 393], 99.90th=[ 393], 99.95th=[ 393], | 99.99th=[ 393] bw ( KiB/s): min= 2027, max= 4079, per=87.42%, avg=2543.00, stdev=1024.01, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=983KiB/s (1006kB/s)(6144KiB/6251msec); 0 zone resets clat (msec): min=133, max=3437, avg=769.54, stdev=1312.11 lat (msec): min=133, max=3437, avg=769.88, stdev=1311.98 clat percentiles (msec): | 1.00th=[ 134], 5.00th=[ 134], 10.00th=[ 134], 20.00th=[ 157], | 30.00th=[ 157], 40.00th=[ 180], 50.00th=[ 180], 60.00th=[ 262], | 70.00th=[ 451], 80.00th=[ 451], 90.00th=[ 3440], 95.00th=[ 3440], | 99.00th=[ 3440], 99.50th=[ 3440], 99.90th=[ 3440], 99.95th=[ 3440], | 99.99th=[ 3440] bw ( KiB/s): min= 2019, max= 4055, per=72.16%, avg=2939.25, stdev=1064.41, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 lat (msec) : 250=58.33%, 500=33.33%, >=2000=8.33% cpu : usr=0.00%, sys=9.79%, ctx=152, 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=174969: Wed Sep 30 14:03:35 2026 read: IOPS=0, BW=752KiB/s (770kB/s)(5120KiB/6809msec) clat (usec): min=596, max=197577, avg=81039.21, stdev=105672.79 lat (usec): min=597, max=197578, avg=81040.27, stdev=105672.50 clat percentiles (usec): | 1.00th=[ 594], 5.00th=[ 594], 10.00th=[ 594], 20.00th=[ 594], | 30.00th=[ 1172], 40.00th=[ 1172], 50.00th=[ 10028], 60.00th=[ 10028], | 70.00th=[196084], 80.00th=[196084], 90.00th=[198181], 95.00th=[198181], | 99.00th=[198181], 99.50th=[198181], 99.90th=[198181], 99.95th=[198181], | 99.99th=[198181] bw ( KiB/s): min= 8192, max= 8192, per=100.00%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 8, max= 8, avg= 8.00, stdev= 0.00, samples=1 write: IOPS=1, BW=1053KiB/s (1078kB/s)(7168KiB/6809msec); 0 zone resets clat (msec): min=205, max=3152, avg=912.49, stdev=1040.42 lat (msec): min=205, max=3152, avg=914.41, stdev=1039.93 clat percentiles (msec): | 1.00th=[ 207], 5.00th=[ 207], 10.00th=[ 207], 20.00th=[ 288], | 30.00th=[ 317], 40.00th=[ 317], 50.00th=[ 584], 60.00th=[ 676], | 70.00th=[ 676], 80.00th=[ 1167], 90.00th=[ 3138], 95.00th=[ 3138], | 99.00th=[ 3138], 99.50th=[ 3138], 99.90th=[ 3138], 99.95th=[ 3138], | 99.99th=[ 3138] bw ( KiB/s): min= 2019, max= 3915, per=59.16%, avg=2409.60, stdev=841.61, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 lat (usec) : 750=8.33% lat (msec) : 2=8.33%, 10=8.33%, 250=25.00%, 500=16.67%, 750=16.67% lat (msec) : 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=5.36%, ctx=159, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2910KiB/s (2979kB/s), 291KiB/s-1215KiB/s (298kB/s-1244kB/s), io=20.0MiB (20.0MB), run=5902-7039msec WRITE: bw=4073KiB/s (4171kB/s), 868KiB/s-1455KiB/s (888kB/s-1490kB/s), io=28.0MiB (29.4MB), run=5902-7039msec rand-rw: (groupid=0, jobs=1): err= 0: pid=174961: Wed Sep 30 14:03:35 2026 read: IOPS=2, BW=2160KiB/s (2212kB/s)(7168KiB/3318msec) clat (msec): min=83, max=338, avg=146.18, stdev=87.00 lat (msec): min=83, max=338, avg=146.18, stdev=87.00 clat percentiles (msec): | 1.00th=[ 84], 5.00th=[ 84], 10.00th=[ 84], 20.00th=[ 106], | 30.00th=[ 106], 40.00th=[ 106], 50.00th=[ 121], 60.00th=[ 124], | 70.00th=[ 124], 80.00th=[ 148], 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= 2039, max= 5873, per=100.00%, avg=3989.00, stdev=1917.85, samples=3 iops : min= 1, max= 5, avg= 3.00, stdev= 2.00, samples=3 write: IOPS=1, BW=1543KiB/s (1580kB/s)(5120KiB/3318msec); 0 zone resets clat (msec): min=299, max=681, avg=438.39, stdev=146.18 lat (msec): min=299, max=681, avg=438.75, stdev=146.03 clat percentiles (msec): | 1.00th=[ 300], 5.00th=[ 300], 10.00th=[ 300], 20.00th=[ 300], | 30.00th=[ 359], 40.00th=[ 359], 50.00th=[ 414], 60.00th=[ 414], | 70.00th=[ 439], 80.00th=[ 439], 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= 2027, max= 4007, per=71.40%, avg=2689.67, stdev=1140.85, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 100=8.33%, 250=41.67%, 500=41.67%, 750=8.33% cpu : usr=0.03%, sys=3.86%, ctx=70, 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=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=174962: Wed Sep 30 14:03:35 2026 read: IOPS=0, BW=269KiB/s (276kB/s)(2048KiB/7610msec) clat (msec): min=113, max=499, avg=306.41, stdev=272.51 lat (msec): min=113, max=499, avg=306.41, stdev=272.51 clat percentiles (msec): | 1.00th=[ 114], 5.00th=[ 114], 10.00th=[ 114], 20.00th=[ 114], | 30.00th=[ 114], 40.00th=[ 114], 50.00th=[ 114], 60.00th=[ 498], | 70.00th=[ 498], 80.00th=[ 498], 90.00th=[ 498], 95.00th=[ 498], | 99.00th=[ 498], 99.50th=[ 498], 99.90th=[ 498], 99.95th=[ 498], | 99.99th=[ 498] bw ( KiB/s): min= 1924, max= 2039, per=73.63%, avg=1981.50, stdev=81.32, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1346KiB/s (1378kB/s)(10.0MiB/7610msec); 0 zone resets clat (msec): min=189, max=3168, avg=691.53, stdev=896.84 lat (msec): min=189, max=3168, avg=691.64, stdev=896.84 clat percentiles (msec): | 1.00th=[ 190], 5.00th=[ 190], 10.00th=[ 190], 20.00th=[ 215], | 30.00th=[ 222], 40.00th=[ 224], 50.00th=[ 388], 60.00th=[ 430], | 70.00th=[ 592], 80.00th=[ 667], 90.00th=[ 818], 95.00th=[ 3171], | 99.00th=[ 3171], 99.50th=[ 3171], 99.90th=[ 3171], 99.95th=[ 3171], | 99.99th=[ 3171] bw ( KiB/s): min= 1924, max= 4071, per=68.76%, avg=2590.14, stdev=1006.90, samples=7 iops : min= 1, max= 3, avg= 1.57, stdev= 0.98, samples=7 lat (msec) : 250=41.67%, 500=25.00%, 750=16.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=2.13%, ctx=64, 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=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=174963: Wed Sep 30 14:03:35 2026 read: IOPS=0, BW=929KiB/s (951kB/s)(6144KiB/6616msec) clat (msec): min=103, max=330, avg=173.93, stdev=85.33 lat (msec): min=103, max=330, avg=173.93, stdev=85.33 clat percentiles (msec): | 1.00th=[ 104], 5.00th=[ 104], 10.00th=[ 104], 20.00th=[ 109], | 30.00th=[ 109], 40.00th=[ 128], 50.00th=[ 128], 60.00th=[ 176], | 70.00th=[ 199], 80.00th=[ 199], 90.00th=[ 330], 95.00th=[ 330], | 99.00th=[ 330], 99.50th=[ 330], 99.90th=[ 330], 99.95th=[ 330], | 99.99th=[ 330] bw ( KiB/s): min= 2027, max= 4071, per=94.61%, avg=2546.00, stdev=1016.69, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=929KiB/s (951kB/s)(6144KiB/6616msec); 0 zone resets clat (msec): min=157, max=4102, avg=911.73, stdev=1568.13 lat (msec): min=157, max=4103, avg=911.87, stdev=1568.24 clat percentiles (msec): | 1.00th=[ 159], 5.00th=[ 159], 10.00th=[ 159], 20.00th=[ 232], | 30.00th=[ 232], 40.00th=[ 232], 50.00th=[ 232], 60.00th=[ 234], | 70.00th=[ 514], 80.00th=[ 514], 90.00th=[ 4111], 95.00th=[ 4111], | 99.00th=[ 4111], 99.50th=[ 4111], 99.90th=[ 4111], 99.95th=[ 4111], | 99.99th=[ 4111] bw ( KiB/s): min= 2027, max= 4087, per=80.16%, avg=3019.75, stdev=1143.51, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 lat (msec) : 250=75.00%, 500=8.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=1.92%, ctx=52, 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=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=174964: Wed Sep 30 14:03:35 2026 read: IOPS=0, BW=689KiB/s (705kB/s)(5120KiB/7434msec) clat (msec): min=87, max=438, avg=222.69, stdev=139.25 lat (msec): min=87, max=438, avg=222.69, stdev=139.25 clat percentiles (msec): | 1.00th=[ 88], 5.00th=[ 88], 10.00th=[ 88], 20.00th=[ 88], | 30.00th=[ 117], 40.00th=[ 117], 50.00th=[ 213], 60.00th=[ 213], | 70.00th=[ 257], 80.00th=[ 257], 90.00th=[ 439], 95.00th=[ 439], | 99.00th=[ 439], 99.50th=[ 439], 99.90th=[ 439], 99.95th=[ 439], | 99.99th=[ 439] bw ( KiB/s): min= 4007, max= 4079, per=100.00%, avg=4043.00, stdev=50.91, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=0, BW=964KiB/s (987kB/s)(7168KiB/7434msec); 0 zone resets clat (msec): min=223, max=3668, avg=895.24, stdev=1245.67 lat (msec): min=223, max=3668, avg=895.33, stdev=1245.66 clat percentiles (msec): | 1.00th=[ 224], 5.00th=[ 224], 10.00th=[ 224], 20.00th=[ 255], | 30.00th=[ 288], 40.00th=[ 288], 50.00th=[ 338], 60.00th=[ 609], | 70.00th=[ 609], 80.00th=[ 885], 90.00th=[ 3675], 95.00th=[ 3675], | 99.00th=[ 3675], 99.50th=[ 3675], 99.90th=[ 3675], 99.95th=[ 3675], | 99.99th=[ 3675] bw ( KiB/s): min= 2035, max= 4015, per=77.98%, avg=2937.50, stdev=1047.75, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 lat (msec) : 100=8.33%, 250=25.00%, 500=41.67%, 750=8.33%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=2.25%, ctx=56, 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=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=2691KiB/s (2756kB/s), 269KiB/s-2160KiB/s (276kB/s-2212kB/s), io=20.0MiB (20.0MB), run=3318-7610msec WRITE: bw=3768KiB/s (3858kB/s), 929KiB/s-1543KiB/s (951kB/s-1580kB/s), io=28.0MiB (29.4MB), run=3318-7610msec 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=174979: Wed Sep 30 14:03:50 2026 read: IOPS=0, BW=3497KiB/s (3581kB/s)(12.0MiB/3514msec) clat (msec): min=889, max=1282, avg=1089.46, stdev=196.57 lat (msec): min=889, max=1282, avg=1089.46, stdev=196.57 clat percentiles (msec): | 1.00th=[ 894], 5.00th=[ 894], 10.00th=[ 894], 20.00th=[ 894], | 30.00th=[ 894], 40.00th=[ 1099], 50.00th=[ 1099], 60.00th=[ 1099], | 70.00th=[ 1284], 80.00th=[ 1284], 90.00th=[ 1284], 95.00th=[ 1284], | 99.00th=[ 1284], 99.50th=[ 1284], 99.90th=[ 1284], 99.95th=[ 1284], | 99.99th=[ 1284] bw ( KiB/s): min= 8110, max= 8143, per=100.00%, avg=8126.50, stdev=23.33, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.36%, ctx=60, majf=0, minf=7 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=174980: Wed Sep 30 14:03:50 2026 read: IOPS=0, BW=1018KiB/s (1042kB/s)(4096KiB/4024msec) clat (nsec): min=1481.2M, max=1481.2M, avg=1481224515.00, stdev= 0.00 lat (nsec): min=1481.2M, max=1481.2M, avg=1481225640.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1485], 5.00th=[ 1485], 10.00th=[ 1485], 20.00th=[ 1485], | 30.00th=[ 1485], 40.00th=[ 1485], 50.00th=[ 1485], 60.00th=[ 1485], | 70.00th=[ 1485], 80.00th=[ 1485], 90.00th=[ 1485], 95.00th=[ 1485], | 99.00th=[ 1485], 99.50th=[ 1485], 99.90th=[ 1485], 99.95th=[ 1485], | 99.99th=[ 1485] bw ( KiB/s): min= 8110, max= 8110, per=100.00%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2036KiB/s (2085kB/s)(8192KiB/4024msec); 0 zone resets clat (msec): min=630, max=1819, avg=1224.64, stdev=840.69 lat (msec): min=632, max=1819, avg=1226.20, stdev=839.27 clat percentiles (msec): | 1.00th=[ 634], 5.00th=[ 634], 10.00th=[ 634], 20.00th=[ 634], | 30.00th=[ 634], 40.00th=[ 634], 50.00th=[ 634], 60.00th=[ 1821], | 70.00th=[ 1821], 80.00th=[ 1821], 90.00th=[ 1821], 95.00th=[ 1821], | 99.00th=[ 1821], 99.50th=[ 1821], 99.90th=[ 1821], 99.95th=[ 1821], | 99.99th=[ 1821] bw ( KiB/s): min= 8159, max= 8159, per=100.00%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.05%, sys=2.88%, ctx=46, 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=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=174981: Wed Sep 30 14:03:50 2026 write: IOPS=1, BW=4733KiB/s (4847kB/s)(12.0MiB/2596msec); 0 zone resets clat (msec): min=487, max=1058, avg=827.10, stdev=300.82 lat (msec): min=487, max=1059, avg=827.68, stdev=300.86 clat percentiles (msec): | 1.00th=[ 489], 5.00th=[ 489], 10.00th=[ 489], 20.00th=[ 489], | 30.00th=[ 489], 40.00th=[ 936], 50.00th=[ 936], 60.00th=[ 936], | 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= 6041, max= 8110, per=86.89%, avg=7075.50, stdev=1463.00, 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=0.31%, sys=4.74%, ctx=39, majf=0, minf=7 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=174982: Wed Sep 30 14:03:50 2026 write: IOPS=1, BW=4465KiB/s (4572kB/s)(12.0MiB/2752msec); 0 zone resets clat (msec): min=470, max=1457, avg=867.58, stdev=521.33 lat (msec): min=470, max=1458, avg=869.06, stdev=520.76 clat percentiles (msec): | 1.00th=[ 472], 5.00th=[ 472], 10.00th=[ 472], 20.00th=[ 472], | 30.00th=[ 472], 40.00th=[ 676], 50.00th=[ 676], 60.00th=[ 676], | 70.00th=[ 1452], 80.00th=[ 1452], 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= 5801, max= 8110, per=85.42%, avg=6955.50, stdev=1632.71, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.00%, ctx=50, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=4072KiB/s (4169kB/s), 1018KiB/s-3497KiB/s (1042kB/s-3581kB/s), io=16.0MiB (16.8MB), run=3514-4024msec WRITE: bw=8143KiB/s (8339kB/s), 2036KiB/s-4733KiB/s (2085kB/s-4847kB/s), io=32.0MiB (33.6MB), run=2596-4024msec rand-rw: (groupid=0, jobs=1): err= 0: pid=174984: Wed Sep 30 14:03:51 2026 read: IOPS=1, BW=4558KiB/s (4667kB/s)(12.0MiB/2696msec) clat (msec): min=757, max=1106, avg=898.14, stdev=183.87 lat (msec): min=757, max=1106, avg=898.14, stdev=183.87 clat percentiles (msec): | 1.00th=[ 760], 5.00th=[ 760], 10.00th=[ 760], 20.00th=[ 760], | 30.00th=[ 760], 40.00th=[ 835], 50.00th=[ 835], 60.00th=[ 835], | 70.00th=[ 1099], 80.00th=[ 1099], 90.00th=[ 1099], 95.00th=[ 1099], | 99.00th=[ 1099], 99.50th=[ 1099], 99.90th=[ 1099], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 8078, max= 8094, per=100.00%, avg=8086.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=66.67%, 2000=33.33% cpu : usr=0.33%, sys=10.91%, 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=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=174985: Wed Sep 30 14:03:51 2026 read: IOPS=0, BW=1615KiB/s (1654kB/s)(4096KiB/2536msec) clat (nsec): min=810190k, max=810190k, avg=810189758.00, stdev= 0.00 lat (nsec): min=810191k, max=810191k, avg=810191208.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 810], 5.00th=[ 810], 10.00th=[ 810], 20.00th=[ 810], | 30.00th=[ 810], 40.00th=[ 810], 50.00th=[ 810], 60.00th=[ 810], | 70.00th=[ 810], 80.00th=[ 810], 90.00th=[ 810], 95.00th=[ 810], | 99.00th=[ 810], 99.50th=[ 810], 99.90th=[ 810], 99.95th=[ 810], | 99.99th=[ 810] bw ( KiB/s): min= 8126, max= 8126, per=100.00%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3230KiB/s (3308kB/s)(8192KiB/2536msec); 0 zone resets clat (msec): min=369, max=1351, avg=860.99, stdev=694.38 lat (msec): min=370, max=1353, avg=862.11, stdev=695.51 clat percentiles (msec): | 1.00th=[ 372], 5.00th=[ 372], 10.00th=[ 372], 20.00th=[ 372], | 30.00th=[ 372], 40.00th=[ 372], 50.00th=[ 372], 60.00th=[ 1351], | 70.00th=[ 1351], 80.00th=[ 1351], 90.00th=[ 1351], 95.00th=[ 1351], | 99.00th=[ 1351], 99.50th=[ 1351], 99.90th=[ 1351], 99.95th=[ 1351], | 99.99th=[ 1351] bw ( KiB/s): min= 7742, max= 7742, per=96.85%, avg=7742.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=8.05%, ctx=116, 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=174986: Wed Sep 30 14:03:51 2026 write: IOPS=0, BW=2998KiB/s (3070kB/s)(12.0MiB/4099msec); 0 zone resets clat (msec): min=324, max=2053, avg=1365.62, stdev=916.64 lat (msec): min=325, max=2053, avg=1365.96, stdev=916.62 clat percentiles (msec): | 1.00th=[ 326], 5.00th=[ 326], 10.00th=[ 326], 20.00th=[ 326], | 30.00th=[ 326], 40.00th=[ 1720], 50.00th=[ 1720], 60.00th=[ 1720], | 70.00th=[ 2056], 80.00th=[ 2056], 90.00th=[ 2056], 95.00th=[ 2056], | 99.00th=[ 2056], 99.50th=[ 2056], 99.90th=[ 2056], 99.95th=[ 2056], | 99.99th=[ 2056] bw ( KiB/s): min= 7816, max= 7816, per=97.77%, avg=7816.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=4.25%, ctx=64, 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=174987: Wed Sep 30 14:03:51 2026 write: IOPS=0, BW=3495KiB/s (3579kB/s)(12.0MiB/3516msec); 0 zone resets clat (msec): min=365, max=2373, avg=1170.35, stdev=1061.78 lat (msec): min=366, max=2374, avg=1170.98, stdev=1061.53 clat percentiles (msec): | 1.00th=[ 368], 5.00th=[ 368], 10.00th=[ 368], 20.00th=[ 368], | 30.00th=[ 368], 40.00th=[ 776], 50.00th=[ 776], 60.00th=[ 776], | 70.00th=[ 2366], 80.00th=[ 2366], 90.00th=[ 2366], 95.00th=[ 2366], | 99.00th=[ 2366], 99.50th=[ 2366], 99.90th=[ 2366], 99.95th=[ 2366], | 99.99th=[ 2366] bw ( KiB/s): min= 8126, max= 8126, per=100.00%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 1000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=3.33%, ctx=70, 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=6077KiB/s (6223kB/s), 1615KiB/s-4558KiB/s (1654kB/s-4667kB/s), io=16.0MiB (16.8MB), run=2536-2696msec WRITE: bw=7994KiB/s (8186kB/s), 2998KiB/s-3495KiB/s (3070kB/s-3579kB/s), io=32.0MiB (33.6MB), run=2536-4099msec