== sanity test 398b: DIO and buffer IO race ============== 00:08:26 (1789445306) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.1967 s, 8.1 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=179440: Tue Sep 15 00:10:49 2026 read: IOPS=12, BW=48.5KiB/s (49.6kB/s)(5992KiB/123592msec) clat (usec): min=38, max=297858, avg=45735.80, stdev=31214.56 lat (usec): min=39, max=297860, avg=45737.10, stdev=31214.50 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 9110], 10.00th=[ 16909], 20.00th=[ 22414], | 30.00th=[ 28181], 40.00th=[ 32900], 50.00th=[ 39584], 60.00th=[ 46400], | 70.00th=[ 54789], 80.00th=[ 65274], 90.00th=[ 83362], 95.00th=[101188], | 99.00th=[158335], 99.50th=[196084], 99.90th=[244319], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 7, max= 102, per=24.80%, avg=47.87, stdev=18.15, samples=244 iops : min= 1, max= 25, avg=11.33, stdev= 4.58, samples=244 write: IOPS=12, BW=50.9KiB/s (52.2kB/s)(6296KiB/123592msec); 0 zone resets clat (usec): min=967, max=624062, avg=34728.57, stdev=38511.50 lat (usec): min=968, max=624064, avg=34741.39, stdev=38508.74 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1254], 10.00th=[ 1745], 20.00th=[ 4178], | 30.00th=[ 7439], 40.00th=[ 17433], 50.00th=[ 25560], 60.00th=[ 33424], | 70.00th=[ 43254], 80.00th=[ 58459], 90.00th=[ 82314], 95.00th=[103285], | 99.00th=[166724], 99.50th=[191890], 99.90th=[283116], 99.95th=[624952], | 99.99th=[624952] bw ( KiB/s): min= 15, max= 135, per=25.01%, avg=50.52, stdev=22.24, samples=243 iops : min= 3, max= 33, avg=11.99, stdev= 5.60, samples=243 lat (usec) : 50=0.52%, 100=1.37%, 250=0.29%, 500=0.03%, 1000=0.16% lat (msec) : 2=5.63%, 4=4.33%, 10=7.45%, 20=9.47%, 50=40.53% lat (msec) : 100=24.80%, 250=5.31%, 500=0.07%, 750=0.03% cpu : usr=0.08%, sys=4.91%, ctx=6616, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179441: Tue Sep 15 00:10:49 2026 read: IOPS=11, BW=47.8KiB/s (48.0kB/s)(5940KiB/124165msec) clat (usec): min=41, max=266101, avg=44833.69, stdev=29778.63 lat (usec): min=41, max=266102, avg=44834.90, stdev=29778.55 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 11731], 10.00th=[ 16909], 20.00th=[ 22152], | 30.00th=[ 27132], 40.00th=[ 32637], 50.00th=[ 39060], 60.00th=[ 45351], | 70.00th=[ 53216], 80.00th=[ 64226], 90.00th=[ 80217], 95.00th=[100140], | 99.00th=[149947], 99.50th=[175113], 99.90th=[238027], 99.95th=[265290], | 99.99th=[265290] bw ( KiB/s): min= 7, max= 108, per=24.42%, avg=47.13, stdev=19.82, samples=245 iops : min= 1, max= 27, avg=11.13, stdev= 4.98, samples=245 write: IOPS=12, BW=51.1KiB/s (52.4kB/s)(6348KiB/124165msec); 0 zone resets clat (usec): min=864, max=666326, avg=36027.66, stdev=39423.66 lat (usec): min=865, max=666327, avg=36035.19, stdev=39423.25 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1254], 10.00th=[ 1795], 20.00th=[ 4047], | 30.00th=[ 8029], 40.00th=[ 17695], 50.00th=[ 25822], 60.00th=[ 34866], | 70.00th=[ 45876], 80.00th=[ 63701], 90.00th=[ 86508], 95.00th=[104334], | 99.00th=[156238], 99.50th=[185598], 99.90th=[261096], 99.95th=[666895], | 99.99th=[666895] bw ( KiB/s): min= 7, max= 111, per=24.86%, avg=50.22, stdev=21.30, samples=245 iops : min= 1, max= 27, avg=11.92, stdev= 5.33, samples=245 lat (usec) : 50=0.29%, 100=1.20%, 250=0.13%, 500=0.03%, 750=0.07% lat (usec) : 1000=0.03% lat (msec) : 2=6.12%, 4=4.17%, 10=6.97%, 20=10.81%, 50=39.84% lat (msec) : 100=24.84%, 250=5.37%, 500=0.10%, 750=0.03% cpu : usr=0.06%, sys=4.96%, ctx=6697, 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=179442: Tue Sep 15 00:10:49 2026 read: IOPS=12, BW=48.0KiB/s (50.1kB/s)(6028KiB/123145msec) clat (usec): min=34, max=280910, avg=43410.33, stdev=30211.09 lat (usec): min=34, max=280911, avg=43413.43, stdev=30212.09 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 8717], 10.00th=[ 16188], 20.00th=[ 21890], | 30.00th=[ 26608], 40.00th=[ 31851], 50.00th=[ 37487], 60.00th=[ 43779], | 70.00th=[ 51643], 80.00th=[ 60556], 90.00th=[ 78119], 95.00th=[ 93848], | 99.00th=[158335], 99.50th=[196084], 99.90th=[250610], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 7, max= 135, per=25.38%, avg=48.99, stdev=20.44, samples=240 iops : min= 1, max= 33, avg=11.60, stdev= 5.15, samples=240 write: IOPS=12, BW=50.8KiB/s (52.1kB/s)(6260KiB/123145msec); 0 zone resets clat (usec): min=800, max=715808, avg=36644.59, stdev=41446.84 lat (usec): min=801, max=715810, avg=36647.43, stdev=41451.98 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1287], 10.00th=[ 1778], 20.00th=[ 3752], | 30.00th=[ 6915], 40.00th=[ 16057], 50.00th=[ 26870], 60.00th=[ 36439], | 70.00th=[ 47973], 80.00th=[ 62653], 90.00th=[ 86508], 95.00th=[107480], | 99.00th=[164627], 99.50th=[189793], 99.90th=[337642], 99.95th=[717226], | 99.99th=[717226] bw ( KiB/s): min= 7, max= 119, per=24.94%, avg=50.39, stdev=20.73, samples=242 iops : min= 1, max= 29, avg=11.96, stdev= 5.22, samples=242 lat (usec) : 50=0.33%, 100=1.79%, 250=0.20%, 500=0.07%, 1000=0.10% lat (msec) : 2=5.50%, 4=5.14%, 10=7.29%, 20=9.70%, 50=39.81% lat (msec) : 100=24.77%, 250=5.14%, 500=0.13%, 750=0.03% cpu : usr=0.08%, sys=4.92%, ctx=6587, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179443: Tue Sep 15 00:10:49 2026 read: IOPS=12, BW=49.0KiB/s (50.2kB/s)(6052KiB/123501msec) clat (usec): min=46, max=280642, avg=44955.53, stdev=28635.63 lat (usec): min=47, max=280643, avg=44973.49, stdev=28662.65 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 12256], 10.00th=[ 17171], 20.00th=[ 22938], | 30.00th=[ 27919], 40.00th=[ 33424], 50.00th=[ 39584], 60.00th=[ 45876], | 70.00th=[ 53216], 80.00th=[ 64226], 90.00th=[ 79168], 95.00th=[ 94897], | 99.00th=[143655], 99.50th=[168821], 99.90th=[217056], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 7, max= 111, per=25.32%, avg=48.88, stdev=19.16, samples=242 iops : min= 1, max= 27, avg=11.58, stdev= 4.82, samples=242 write: IOPS=12, BW=50.5KiB/s (51.7kB/s)(6236KiB/123501msec); 0 zone resets clat (usec): min=970, max=715449, avg=35299.78, stdev=40108.91 lat (usec): min=970, max=715451, avg=35303.70, stdev=40107.73 clat percentiles (usec): | 1.00th=[ 1045], 5.00th=[ 1237], 10.00th=[ 1614], 20.00th=[ 3425], | 30.00th=[ 6783], 40.00th=[ 14615], 50.00th=[ 24511], 60.00th=[ 34341], | 70.00th=[ 44827], 80.00th=[ 62653], 90.00th=[ 87557], 95.00th=[106431], | 99.00th=[147850], 99.50th=[185598], 99.90th=[229639], 99.95th=[717226], | 99.99th=[717226] bw ( KiB/s): min= 7, max= 132, per=24.78%, avg=50.05, stdev=22.01, samples=243 iops : min= 1, max= 33, avg=11.87, stdev= 5.55, samples=243 lat (usec) : 50=0.16%, 100=1.40%, 250=0.20%, 1000=0.10% lat (msec) : 2=6.18%, 4=5.11%, 10=6.80%, 20=10.19%, 50=39.97% lat (msec) : 100=24.22%, 250=5.60%, 500=0.03%, 750=0.03% cpu : usr=0.07%, sys=5.18%, ctx=6772, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=193KiB/s (198kB/s), 47.8KiB/s-49.0KiB/s (48.0kB/s-50.2kB/s), io=23.4MiB (24.6MB), run=123145-124165msec WRITE: bw=202KiB/s (207kB/s), 50.5KiB/s-51.1KiB/s (51.7kB/s-52.4kB/s), io=24.6MiB (25.7MB), run=123145-124165msec fio: pid=179444, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=179444: Tue Sep 15 00:11:35 2026 read: IOPS=7, BW=29.7KiB/s (30.4kB/s)(3980KiB/134230msec) clat (msec): min=5, max=626, avg=50.83, stdev=42.54 lat (msec): min=5, max=626, avg=50.83, stdev=42.54 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 22], | 30.00th=[ 27], 40.00th=[ 32], 50.00th=[ 39], 60.00th=[ 47], | 70.00th=[ 58], 80.00th=[ 75], 90.00th=[ 103], 95.00th=[ 127], | 99.00th=[ 186], 99.50th=[ 209], 99.90th=[ 625], 99.95th=[ 625], | 99.99th=[ 625] bw ( KiB/s): min= 7, max= 119, per=23.27%, avg=30.02, stdev=17.76, samples=256 iops : min= 1, max= 29, avg= 6.83, stdev= 4.45, samples=256 write: IOPS=7, BW=31.5KiB/s (32.2kB/s)(4224KiB/134230msec); 0 zone resets clat (msec): min=13, max=380, avg=78.93, stdev=46.91 lat (msec): min=13, max=380, avg=78.93, stdev=46.91 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 26], 10.00th=[ 32], 20.00th=[ 40], | 30.00th=[ 51], 40.00th=[ 59], 50.00th=[ 70], 60.00th=[ 81], | 70.00th=[ 93], 80.00th=[ 109], 90.00th=[ 138], 95.00th=[ 165], | 99.00th=[ 243], 99.50th=[ 309], 99.90th=[ 338], 99.95th=[ 380], | 99.99th=[ 380] bw ( KiB/s): min= 7, max= 111, per=22.92%, avg=30.94, stdev=16.42, samples=264 iops : min= 1, max= 27, avg= 7.06, stdev= 4.13, samples=264 lat (msec) : 10=1.17%, 20=7.89%, 50=37.67%, 100=34.89%, 250=17.74% lat (msec) : 500=0.54%, 750=0.05% cpu : usr=0.04%, sys=1.52%, ctx=2811, majf=0, minf=21 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=996,1056,0,0 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=179445: Tue Sep 15 00:11:35 2026 read: IOPS=8, BW=35.1KiB/s (35.9kB/s)(5940KiB/169413msec) clat (msec): min=4, max=674, avg=44.32, stdev=38.88 lat (msec): min=4, max=674, avg=44.32, stdev=38.88 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 19], | 30.00th=[ 23], 40.00th=[ 29], 50.00th=[ 34], 60.00th=[ 40], | 70.00th=[ 48], 80.00th=[ 61], 90.00th=[ 91], 95.00th=[ 115], | 99.00th=[ 178], 99.50th=[ 203], 99.90th=[ 279], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 7, max= 112, per=27.80%, avg=35.86, stdev=22.14, samples=322 iops : min= 1, max= 28, avg= 8.31, stdev= 5.58, samples=322 write: IOPS=9, BW=37.5KiB/s (38.4kB/s)(6348KiB/169413msec); 0 zone resets clat (msec): min=12, max=381, avg=65.07, stdev=44.84 lat (msec): min=12, max=381, avg=65.08, stdev=44.84 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 22], 10.00th=[ 26], 20.00th=[ 32], | 30.00th=[ 37], 40.00th=[ 43], 50.00th=[ 51], 60.00th=[ 63], | 70.00th=[ 77], 80.00th=[ 94], 90.00th=[ 121], 95.00th=[ 150], | 99.00th=[ 230], 99.50th=[ 255], 99.90th=[ 368], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 7, max= 103, per=27.62%, avg=37.29, stdev=20.76, samples=331 iops : min= 1, max= 25, avg= 8.66, stdev= 5.23, samples=331 lat (msec) : 10=2.08%, 20=11.46%, 50=46.61%, 100=27.18%, 250=12.27% lat (msec) : 500=0.36%, 750=0.03% cpu : usr=0.05%, sys=1.82%, ctx=5213, 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=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=179446: Tue Sep 15 00:11:35 2026 read: IOPS=8, BW=35.6KiB/s (36.5kB/s)(6028KiB/169262msec) clat (msec): min=5, max=311, avg=46.73, stdev=39.41 lat (msec): min=5, max=311, avg=46.73, stdev=39.41 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 29], 50.00th=[ 34], 60.00th=[ 41], | 70.00th=[ 51], 80.00th=[ 67], 90.00th=[ 99], 95.00th=[ 129], | 99.00th=[ 190], 99.50th=[ 211], 99.90th=[ 305], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 7, max= 128, per=27.72%, avg=35.76, stdev=21.12, samples=328 iops : min= 1, max= 32, avg= 8.29, stdev= 5.32, samples=328 write: IOPS=9, BW=36.0KiB/s (37.9kB/s)(6260KiB/169262msec); 0 zone resets clat (msec): min=8, max=699, avg=62.99, stdev=46.28 lat (msec): min=8, max=699, avg=62.99, stdev=46.28 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 21], 10.00th=[ 24], 20.00th=[ 29], | 30.00th=[ 36], 40.00th=[ 42], 50.00th=[ 50], 60.00th=[ 59], | 70.00th=[ 72], 80.00th=[ 91], 90.00th=[ 120], 95.00th=[ 150], | 99.00th=[ 213], 99.50th=[ 253], 99.90th=[ 439], 99.95th=[ 701], | 99.99th=[ 701] bw ( KiB/s): min= 7, max= 127, per=27.20%, avg=36.73, stdev=21.66, samples=332 iops : min= 1, max= 31, avg= 8.52, stdev= 5.45, samples=332 lat (msec) : 10=1.53%, 20=11.82%, 50=46.68%, 100=27.18%, 250=12.30% lat (msec) : 500=0.46%, 750=0.03% cpu : usr=0.06%, sys=1.78%, ctx=5175, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179447: Tue Sep 15 00:11:35 2026 read: IOPS=8, BW=35.5KiB/s (36.4kB/s)(6052KiB/170349msec) clat (msec): min=6, max=289, avg=45.65, stdev=38.30 lat (msec): min=6, max=289, avg=45.65, stdev=38.30 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 19], | 30.00th=[ 23], 40.00th=[ 29], 50.00th=[ 34], 60.00th=[ 41], | 70.00th=[ 49], 80.00th=[ 64], 90.00th=[ 101], 95.00th=[ 128], | 99.00th=[ 186], 99.50th=[ 207], 99.90th=[ 288], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 7, max= 125, per=27.96%, avg=36.06, stdev=22.70, samples=326 iops : min= 1, max= 31, avg= 8.36, stdev= 5.72, samples=326 write: IOPS=9, BW=36.6KiB/s (37.5kB/s)(6236KiB/170349msec); 0 zone resets clat (msec): min=12, max=701, avg=64.78, stdev=47.22 lat (msec): min=12, max=701, avg=64.78, stdev=47.22 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 21], 10.00th=[ 25], 20.00th=[ 31], | 30.00th=[ 36], 40.00th=[ 43], 50.00th=[ 51], 60.00th=[ 62], | 70.00th=[ 74], 80.00th=[ 92], 90.00th=[ 125], 95.00th=[ 157], | 99.00th=[ 213], 99.50th=[ 275], 99.90th=[ 380], 99.95th=[ 701], | 99.99th=[ 701] bw ( KiB/s): min= 7, max= 111, per=26.86%, avg=36.25, stdev=20.86, samples=334 iops : min= 1, max= 27, avg= 8.40, stdev= 5.25, samples=334 lat (msec) : 10=1.86%, 20=12.27%, 50=45.87%, 100=26.76%, 250=12.89% lat (msec) : 500=0.33%, 750=0.03% cpu : usr=0.05%, sys=1.80%, ctx=5210, 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=129KiB/s (132kB/s), 29.7KiB/s-35.6KiB/s (30.4kB/s-36.5kB/s), io=21.5MiB (22.5MB), run=134230-170349msec WRITE: bw=135KiB/s (139kB/s), 31.5KiB/s-37.5KiB/s (32.2kB/s-38.4kB/s), io=22.5MiB (23.6MB), run=134230-170349msec 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=179488: Tue Sep 15 00:12:13 2026 read: IOPS=13, BW=222KiB/s (227kB/s)(5920KiB/26675msec) clat (usec): min=38, max=153108, avg=38305.40, stdev=28262.58 lat (usec): min=39, max=153108, avg=38306.65, stdev=28262.64 clat percentiles (usec): | 1.00th=[ 44], 5.00th=[ 58], 10.00th=[ 64], 20.00th=[ 17433], | 30.00th=[ 23462], 40.00th=[ 28181], 50.00th=[ 33424], 60.00th=[ 40633], | 70.00th=[ 48497], 80.00th=[ 58459], 90.00th=[ 77071], 95.00th=[ 90702], | 99.00th=[123208], 99.50th=[139461], 99.90th=[154141], 99.95th=[154141], | 99.99th=[154141] bw ( KiB/s): min= 63, max= 510, per=26.69%, avg=219.10, stdev=84.92, samples=52 iops : min= 3, max= 31, avg=12.92, stdev= 5.32, samples=52 write: IOPS=14, BW=239KiB/s (244kB/s)(6368KiB/26675msec); 0 zone resets clat (usec): min=1430, max=216013, avg=30737.39, stdev=34813.53 lat (usec): min=1430, max=216015, avg=30739.23, stdev=34813.56 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1795], 10.00th=[ 2704], 20.00th=[ 4621], | 30.00th=[ 6783], 40.00th=[ 10159], 50.00th=[ 18482], 60.00th=[ 26870], | 70.00th=[ 36439], 80.00th=[ 51643], 90.00th=[ 80217], 95.00th=[101188], | 99.00th=[152044], 99.50th=[173016], 99.90th=[217056], 99.95th=[217056], | 99.99th=[217056] bw ( KiB/s): min= 31, max= 606, per=27.48%, avg=237.46, stdev=90.92, samples=52 iops : min= 1, max= 37, avg=14.10, stdev= 5.70, samples=52 lat (usec) : 50=0.78%, 100=5.86%, 500=0.39% lat (msec) : 2=4.04%, 4=5.21%, 10=12.11%, 20=9.77%, 50=37.50% lat (msec) : 100=20.05%, 250=4.30% cpu : usr=0.09%, sys=6.38%, ctx=1570, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179489: Tue Sep 15 00:12:13 2026 read: IOPS=13, BW=209KiB/s (214kB/s)(5744KiB/27470msec) clat (usec): min=39, max=223169, avg=40818.97, stdev=28235.33 lat (usec): min=39, max=223171, avg=40820.27, stdev=28235.45 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 63], 10.00th=[ 120], 20.00th=[ 19268], | 30.00th=[ 26346], 40.00th=[ 31327], 50.00th=[ 36963], 60.00th=[ 44303], | 70.00th=[ 51643], 80.00th=[ 58459], 90.00th=[ 71828], 95.00th=[ 89654], | 99.00th=[139461], 99.50th=[154141], 99.90th=[223347], 99.95th=[223347], | 99.99th=[223347] bw ( KiB/s): min= 62, max= 447, per=25.56%, avg=209.85, stdev=83.61, samples=53 iops : min= 3, max= 27, avg=12.36, stdev= 5.25, samples=53 write: IOPS=14, BW=238KiB/s (244kB/s)(6544KiB/27470msec); 0 zone resets clat (usec): min=1364, max=176865, avg=30932.91, stdev=31415.73 lat (usec): min=1366, max=176867, avg=30938.11, stdev=31413.24 clat percentiles (usec): | 1.00th=[ 1762], 5.00th=[ 2409], 10.00th=[ 3097], 20.00th=[ 5080], | 30.00th=[ 8455], 40.00th=[ 13173], 50.00th=[ 21365], 60.00th=[ 28705], | 70.00th=[ 38536], 80.00th=[ 54264], 90.00th=[ 71828], 95.00th=[ 96994], | 99.00th=[141558], 99.50th=[154141], 99.90th=[177210], 99.95th=[177210], | 99.99th=[177210] bw ( KiB/s): min= 31, max= 571, per=27.53%, avg=237.87, stdev=98.58, samples=53 iops : min= 1, max= 35, avg=14.11, stdev= 6.22, samples=53 lat (usec) : 50=0.39%, 100=3.52%, 250=1.30% lat (msec) : 2=1.82%, 4=6.38%, 10=9.90%, 20=12.63%, 50=37.11% lat (msec) : 100=23.05%, 250=3.91% cpu : usr=0.08%, sys=6.09%, ctx=1589, 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=179490: Tue Sep 15 00:12:13 2026 read: IOPS=13, BW=215KiB/s (220kB/s)(6256KiB/29162msec) clat (usec): min=35, max=197735, avg=42673.08, stdev=30765.39 lat (usec): min=35, max=197736, avg=42674.16, stdev=30765.38 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 60], 10.00th=[ 93], 20.00th=[ 20317], | 30.00th=[ 25560], 40.00th=[ 30016], 50.00th=[ 36439], 60.00th=[ 45876], | 70.00th=[ 55837], 80.00th=[ 65799], 90.00th=[ 79168], 95.00th=[ 94897], | 99.00th=[145753], 99.50th=[166724], 99.90th=[198181], 99.95th=[198181], | 99.99th=[198181] bw ( KiB/s): min= 63, max= 445, per=26.05%, avg=213.89, stdev=89.01, samples=57 iops : min= 3, max= 27, avg=12.60, stdev= 5.61, samples=57 write: IOPS=12, BW=207KiB/s (212kB/s)(6032KiB/29162msec); 0 zone resets clat (usec): min=1453, max=161095, avg=32949.38, stdev=31550.38 lat (usec): min=1454, max=161098, avg=32954.39, stdev=31555.48 clat percentiles (usec): | 1.00th=[ 1598], 5.00th=[ 1860], 10.00th=[ 3032], 20.00th=[ 5276], | 30.00th=[ 7898], 40.00th=[ 13698], 50.00th=[ 22414], 60.00th=[ 32375], | 70.00th=[ 43779], 80.00th=[ 62129], 90.00th=[ 81265], 95.00th=[ 98042], | 99.00th=[121111], 99.50th=[147850], 99.90th=[160433], 99.95th=[160433], | 99.99th=[160433] bw ( KiB/s): min= 61, max= 434, per=23.54%, avg=203.35, stdev=89.31, samples=57 iops : min= 3, max= 27, avg=11.93, stdev= 5.63, samples=57 lat (usec) : 50=0.91%, 100=4.56%, 250=0.65%, 1000=0.13% lat (msec) : 2=2.99%, 4=4.43%, 10=9.77%, 20=8.98%, 50=36.33% lat (msec) : 100=26.95%, 250=4.30% cpu : usr=0.06%, sys=6.07%, ctx=1705, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179491: Tue Sep 15 00:12:13 2026 read: IOPS=13, BW=219KiB/s (224kB/s)(6032KiB/27525msec) clat (usec): min=40, max=174682, avg=41317.96, stdev=28603.05 lat (usec): min=41, max=174683, avg=41320.83, stdev=28602.73 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 60], 10.00th=[ 106], 20.00th=[ 20841], | 30.00th=[ 26870], 40.00th=[ 31589], 50.00th=[ 38011], 60.00th=[ 44303], | 70.00th=[ 51643], 80.00th=[ 61080], 90.00th=[ 77071], 95.00th=[ 90702], | 99.00th=[137364], 99.50th=[168821], 99.90th=[175113], 99.95th=[175113], | 99.99th=[175113] bw ( KiB/s): min= 63, max= 447, per=26.45%, avg=217.17, stdev=85.85, samples=53 iops : min= 3, max= 27, avg=12.81, stdev= 5.44, samples=53 write: IOPS=14, BW=227KiB/s (233kB/s)(6256KiB/27525msec); 0 zone resets clat (usec): min=1434, max=148799, avg=30138.83, stdev=31812.28 lat (usec): min=1435, max=148801, avg=30150.59, stdev=31835.49 clat percentiles (usec): | 1.00th=[ 1532], 5.00th=[ 1893], 10.00th=[ 2474], 20.00th=[ 5145], | 30.00th=[ 7308], 40.00th=[ 10945], 50.00th=[ 19268], 60.00th=[ 27395], | 70.00th=[ 35914], 80.00th=[ 52167], 90.00th=[ 77071], 95.00th=[ 98042], | 99.00th=[135267], 99.50th=[147850], 99.90th=[147850], 99.95th=[147850], | 99.99th=[147850] bw ( KiB/s): min= 64, max= 443, per=26.17%, avg=226.13, stdev=87.57, samples=53 iops : min= 4, max= 27, avg=13.38, stdev= 5.53, samples=53 lat (usec) : 50=0.52%, 100=4.30%, 250=1.17%, 500=0.13% lat (msec) : 2=3.39%, 4=5.47%, 10=10.55%, 20=9.90%, 50=38.02% lat (msec) : 100=22.53%, 250=4.04% cpu : usr=0.08%, sys=5.99%, ctx=1600, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=821KiB/s (841kB/s), 209KiB/s-222KiB/s (214kB/s-227kB/s), io=23.4MiB (24.5MB), run=26675-29162msec WRITE: bw=864KiB/s (885kB/s), 207KiB/s-239KiB/s (212kB/s-244kB/s), io=24.6MiB (25.8MB), run=26675-29162msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179493: Tue Sep 15 00:12:25 2026 read: IOPS=9, BW=151KiB/s (155kB/s)(5920KiB/39127msec) clat (msec): min=7, max=245, avg=41.05, stdev=34.06 lat (msec): min=7, max=245, avg=41.05, stdev=34.06 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 36], | 70.00th=[ 44], 80.00th=[ 58], 90.00th=[ 83], 95.00th=[ 111], | 99.00th=[ 182], 99.50th=[ 186], 99.90th=[ 245], 99.95th=[ 245], | 99.99th=[ 245] bw ( KiB/s): min= 31, max= 510, per=25.63%, avg=152.75, stdev=94.90, samples=76 iops : min= 1, max= 31, avg= 8.78, stdev= 5.96, samples=76 write: IOPS=10, BW=163KiB/s (167kB/s)(6368KiB/39127msec); 0 zone resets clat (msec): min=14, max=265, avg=59.81, stdev=40.02 lat (msec): min=14, max=265, avg=59.81, stdev=40.02 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 22], 10.00th=[ 26], 20.00th=[ 30], | 30.00th=[ 35], 40.00th=[ 41], 50.00th=[ 48], 60.00th=[ 56], | 70.00th=[ 66], 80.00th=[ 83], 90.00th=[ 112], 95.00th=[ 150], | 99.00th=[ 199], 99.50th=[ 243], 99.90th=[ 266], 99.95th=[ 266], | 99.99th=[ 266] bw ( KiB/s): min= 22, max= 414, per=26.03%, avg=163.18, stdev=91.74, samples=77 iops : min= 1, max= 25, avg= 9.44, stdev= 5.76, samples=77 lat (msec) : 10=1.17%, 20=13.80%, 50=47.53%, 100=27.47%, 250=9.90% lat (msec) : 500=0.13% cpu : usr=0.05%, sys=2.06%, ctx=1209, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179494: Tue Sep 15 00:12:25 2026 read: IOPS=8, BW=143KiB/s (146kB/s)(5744KiB/40173msec) clat (msec): min=6, max=242, avg=41.99, stdev=40.52 lat (msec): min=6, max=242, avg=41.99, stdev=40.52 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 24], 50.00th=[ 27], 60.00th=[ 34], | 70.00th=[ 42], 80.00th=[ 60], 90.00th=[ 95], 95.00th=[ 138], | 99.00th=[ 192], 99.50th=[ 220], 99.90th=[ 243], 99.95th=[ 243], | 99.99th=[ 243] bw ( KiB/s): min= 22, max= 441, per=24.46%, avg=145.78, stdev=97.13, samples=77 iops : min= 1, max= 27, avg= 8.35, stdev= 6.11, samples=77 write: IOPS=10, BW=163KiB/s (167kB/s)(6544KiB/40173msec); 0 zone resets clat (msec): min=12, max=274, avg=61.08, stdev=40.55 lat (msec): min=12, max=274, avg=61.09, stdev=40.55 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 21], 10.00th=[ 23], 20.00th=[ 29], | 30.00th=[ 35], 40.00th=[ 43], 50.00th=[ 52], 60.00th=[ 61], | 70.00th=[ 71], 80.00th=[ 88], 90.00th=[ 112], 95.00th=[ 140], | 99.00th=[ 197], 99.50th=[ 257], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 31, max= 447, per=26.26%, avg=164.67, stdev=92.03, samples=78 iops : min= 1, max= 27, avg= 9.53, stdev= 5.75, samples=78 lat (msec) : 10=2.86%, 20=14.32%, 50=43.75%, 100=27.99%, 250=10.55% lat (msec) : 500=0.52% cpu : usr=0.06%, sys=1.89%, ctx=1166, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179495: Tue Sep 15 00:12:25 2026 read: IOPS=9, BW=158KiB/s (162kB/s)(6256KiB/39648msec) clat (msec): min=6, max=201, avg=42.92, stdev=35.27 lat (msec): min=6, max=201, avg=42.92, stdev=35.27 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 32], 60.00th=[ 39], | 70.00th=[ 49], 80.00th=[ 63], 90.00th=[ 88], 95.00th=[ 120], | 99.00th=[ 182], 99.50th=[ 194], 99.90th=[ 203], 99.95th=[ 203], | 99.99th=[ 203] bw ( KiB/s): min= 22, max= 477, per=26.96%, avg=160.69, stdev=104.44, samples=77 iops : min= 1, max= 29, avg= 9.29, stdev= 6.57, samples=77 write: IOPS=9, BW=152KiB/s (156kB/s)(6032KiB/39648msec); 0 zone resets clat (msec): min=15, max=293, avg=60.40, stdev=38.71 lat (msec): min=15, max=293, avg=60.41, stdev=38.71 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 30], | 30.00th=[ 36], 40.00th=[ 43], 50.00th=[ 48], 60.00th=[ 56], | 70.00th=[ 72], 80.00th=[ 87], 90.00th=[ 112], 95.00th=[ 140], | 99.00th=[ 190], 99.50th=[ 251], 99.90th=[ 296], 99.95th=[ 296], | 99.99th=[ 296] bw ( KiB/s): min= 31, max= 444, per=24.09%, avg=151.04, stdev=83.53, samples=78 iops : min= 1, max= 27, avg= 8.68, stdev= 5.24, samples=78 lat (msec) : 10=2.47%, 20=12.63%, 50=47.01%, 100=26.56%, 250=11.07% lat (msec) : 500=0.26% cpu : usr=0.06%, sys=1.89%, ctx=1188, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179496: Tue Sep 15 00:12:25 2026 read: IOPS=9, BW=153KiB/s (156kB/s)(6032KiB/39513msec) clat (msec): min=6, max=240, avg=43.84, stdev=40.00 lat (msec): min=6, max=240, avg=43.85, stdev=40.00 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 25], 50.00th=[ 30], 60.00th=[ 37], | 70.00th=[ 45], 80.00th=[ 57], 90.00th=[ 97], 95.00th=[ 133], | 99.00th=[ 209], 99.50th=[ 228], 99.90th=[ 241], 99.95th=[ 241], | 99.99th=[ 241] bw ( KiB/s): min= 31, max= 383, per=25.95%, avg=154.68, stdev=88.32, samples=77 iops : min= 1, max= 23, avg= 8.90, stdev= 5.56, samples=77 write: IOPS=9, BW=158KiB/s (162kB/s)(6256KiB/39513msec); 0 zone resets clat (msec): min=11, max=280, avg=58.65, stdev=37.29 lat (msec): min=11, max=280, avg=58.65, stdev=37.29 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 21], 10.00th=[ 24], 20.00th=[ 29], | 30.00th=[ 36], 40.00th=[ 42], 50.00th=[ 49], 60.00th=[ 57], | 70.00th=[ 70], 80.00th=[ 82], 90.00th=[ 106], 95.00th=[ 133], | 99.00th=[ 192], 99.50th=[ 241], 99.90th=[ 279], 99.95th=[ 279], | 99.99th=[ 279] bw ( KiB/s): min= 31, max= 415, per=25.25%, avg=158.35, stdev=92.49, samples=78 iops : min= 1, max= 25, avg= 9.13, stdev= 5.80, samples=78 lat (msec) : 10=1.04%, 20=14.45%, 50=47.92%, 100=26.30%, 250=10.16% lat (msec) : 500=0.13% cpu : usr=0.05%, sys=1.99%, ctx=1268, 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=596KiB/s (611kB/s), 143KiB/s-158KiB/s (146kB/s-162kB/s), io=23.4MiB (24.5MB), run=39127-40173msec WRITE: bw=627KiB/s (642kB/s), 152KiB/s-163KiB/s (156kB/s-167kB/s), io=24.6MiB (25.8MB), run=39127-40173msec 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=179515: Tue Sep 15 00:12:42 2026 read: IOPS=1, BW=1066KiB/s (1091kB/s)(7168KiB/6726msec) clat (usec): min=525, max=3109.9k, avg=611368.05, stdev=1106095.64 lat (usec): min=526, max=3109.9k, avg=611369.54, stdev=1106095.40 clat percentiles (usec): | 1.00th=[ 529], 5.00th=[ 529], 10.00th=[ 529], | 20.00th=[ 166724], 30.00th=[ 200279], 40.00th=[ 200279], | 50.00th=[ 225444], 60.00th=[ 274727], 70.00th=[ 274727], | 80.00th=[ 304088], 90.00th=[3103785], 95.00th=[3103785], | 99.00th=[3103785], 99.50th=[3103785], 99.90th=[3103785], | 99.95th=[3103785], 99.99th=[3103785] bw ( KiB/s): min= 1627, max= 4087, per=87.10%, avg=2346.60, stdev=986.81, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 write: IOPS=0, BW=761KiB/s (779kB/s)(5120KiB/6726msec); 0 zone resets clat (msec): min=221, max=862, avg=459.12, stdev=276.63 lat (msec): min=221, max=862, avg=462.25, stdev=275.17 clat percentiles (msec): | 1.00th=[ 222], 5.00th=[ 222], 10.00th=[ 222], 20.00th=[ 222], | 30.00th=[ 243], 40.00th=[ 243], 50.00th=[ 347], 60.00th=[ 347], | 70.00th=[ 625], 80.00th=[ 625], 90.00th=[ 860], 95.00th=[ 860], | 99.00th=[ 860], 99.50th=[ 860], 99.90th=[ 860], 99.95th=[ 860], | 99.99th=[ 860] bw ( KiB/s): min= 1988, max= 3730, per=68.50%, avg=2583.00, stdev=993.56, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=8.33% lat (msec) : 250=41.67%, 500=25.00%, 750=8.33%, 1000=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=10.42%, ctx=732, 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=179516: Tue Sep 15 00:12:42 2026 read: IOPS=0, BW=269KiB/s (276kB/s)(2048KiB/7602msec) clat (msec): min=227, max=307, avg=267.33, stdev=56.24 lat (msec): min=227, max=307, avg=267.33, stdev=56.23 clat percentiles (msec): | 1.00th=[ 228], 5.00th=[ 228], 10.00th=[ 228], 20.00th=[ 228], | 30.00th=[ 228], 40.00th=[ 228], 50.00th=[ 228], 60.00th=[ 309], | 70.00th=[ 309], 80.00th=[ 309], 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= 1602, max= 2031, per=67.43%, avg=1816.50, stdev=303.35, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1347KiB/s (1379kB/s)(10.0MiB/7602msec); 0 zone resets clat (msec): min=172, max=3551, avg=685.84, stdev=1013.61 lat (msec): min=173, max=3551, avg=686.21, stdev=1013.50 clat percentiles (msec): | 1.00th=[ 174], 5.00th=[ 174], 10.00th=[ 174], 20.00th=[ 220], | 30.00th=[ 321], 40.00th=[ 342], 50.00th=[ 368], 60.00th=[ 409], | 70.00th=[ 443], 80.00th=[ 464], 90.00th=[ 575], 95.00th=[ 3540], | 99.00th=[ 3540], 99.50th=[ 3540], 99.90th=[ 3540], 99.95th=[ 3540], | 99.99th=[ 3540] bw ( KiB/s): min= 1865, max= 4047, per=60.56%, avg=2283.57, stdev=779.76, samples=7 iops : min= 1, max= 3, avg= 1.29, stdev= 0.76, samples=7 lat (msec) : 250=25.00%, 500=58.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=10.16%, ctx=158, 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=179517: Tue Sep 15 00:12:42 2026 read: IOPS=0, BW=812KiB/s (832kB/s)(6144KiB/7564msec) clat (usec): min=483, max=468877, avg=177748.24, stdev=176380.02 lat (usec): min=484, max=468878, avg=177749.50, stdev=176379.89 clat percentiles (usec): | 1.00th=[ 482], 5.00th=[ 482], 10.00th=[ 482], 20.00th=[ 5407], | 30.00th=[ 5407], 40.00th=[139461], 50.00th=[139461], 60.00th=[185598], | 70.00th=[267387], 80.00th=[267387], 90.00th=[467665], 95.00th=[467665], | 99.00th=[467665], 99.50th=[467665], 99.90th=[467665], 99.95th=[467665], | 99.99th=[467665] bw ( KiB/s): min= 2000, max= 4063, per=93.85%, avg=2528.25, stdev=1023.24, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=812KiB/s (832kB/s)(6144KiB/7564msec); 0 zone resets clat (msec): min=127, max=3806, avg=1047.33, stdev=1394.89 lat (msec): min=127, max=3806, avg=1047.66, stdev=1394.83 clat percentiles (msec): | 1.00th=[ 128], 5.00th=[ 128], 10.00th=[ 128], 20.00th=[ 213], | 30.00th=[ 213], 40.00th=[ 451], 50.00th=[ 451], 60.00th=[ 584], | 70.00th=[ 1099], 80.00th=[ 1099], 90.00th=[ 3809], 95.00th=[ 3809], | 99.00th=[ 3809], 99.50th=[ 3809], 99.90th=[ 3809], 99.95th=[ 3809], | 99.99th=[ 3809] bw ( KiB/s): min= 1865, max= 4079, per=66.10%, avg=2492.75, stdev=1059.87, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (usec) : 500=8.33% lat (msec) : 10=8.33%, 250=33.33%, 500=25.00%, 750=8.33%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.01%, sys=6.82%, ctx=146, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179518: Tue Sep 15 00:12:42 2026 read: IOPS=0, BW=712KiB/s (729kB/s)(5120KiB/7187msec) clat (usec): min=463, max=123064, avg=49015.56, stdev=62667.10 lat (usec): min=464, max=123065, avg=49016.65, stdev=62667.14 clat percentiles (usec): | 1.00th=[ 465], 5.00th=[ 465], 10.00th=[ 465], 20.00th=[ 465], | 30.00th=[ 783], 40.00th=[ 783], 50.00th=[ 8979], 60.00th=[ 8979], | 70.00th=[111674], 80.00th=[111674], 90.00th=[123208], 95.00th=[123208], | 99.00th=[123208], 99.50th=[123208], 99.90th=[123208], 99.95th=[123208], | 99.99th=[123208] bw ( KiB/s): min= 8126, max= 8126, per=100.00%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=0, BW=997KiB/s (1021kB/s)(7168KiB/7187msec); 0 zone resets clat (msec): min=248, max=3749, avg=985.53, stdev=1242.59 lat (msec): min=248, max=3749, avg=985.64, stdev=1242.56 clat percentiles (msec): | 1.00th=[ 249], 5.00th=[ 249], 10.00th=[ 249], 20.00th=[ 330], | 30.00th=[ 388], 40.00th=[ 388], 50.00th=[ 558], 60.00th=[ 651], | 70.00th=[ 651], 80.00th=[ 978], 90.00th=[ 3742], 95.00th=[ 3742], | 99.00th=[ 3742], 99.50th=[ 3742], 99.90th=[ 3742], 99.95th=[ 3742], | 99.99th=[ 3742] bw ( KiB/s): min= 2000, max= 2039, per=53.67%, avg=2024.00, stdev=14.66, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (usec) : 500=8.33%, 1000=8.33% lat (msec) : 10=8.33%, 250=25.00%, 500=16.67%, 750=16.67%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.01%, sys=5.34%, ctx=101, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2694KiB/s (2759kB/s), 269KiB/s-1066KiB/s (276kB/s-1091kB/s), io=20.0MiB (20.0MB), run=6726-7602msec WRITE: bw=3772KiB/s (3862kB/s), 761KiB/s-1347KiB/s (779kB/s-1379kB/s), io=28.0MiB (29.4MB), run=6726-7602msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179510: Tue Sep 15 00:12:43 2026 read: IOPS=1, BW=1187KiB/s (1216kB/s)(7168KiB/6037msec) clat (msec): min=123, max=2918, avg=668.43, stdev=1011.75 lat (msec): min=123, max=2918, avg=668.44, stdev=1011.75 clat percentiles (msec): | 1.00th=[ 124], 5.00th=[ 124], 10.00th=[ 124], 20.00th=[ 126], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 247], 60.00th=[ 523], | 70.00th=[ 523], 80.00th=[ 609], 90.00th=[ 2903], 95.00th=[ 2903], | 99.00th=[ 2903], 99.50th=[ 2903], 99.90th=[ 2903], 99.95th=[ 2903], | 99.99th=[ 2903] bw ( KiB/s): min= 1762, max= 4394, per=100.00%, avg=2520.75, stdev=1252.86, samples=4 iops : min= 1, max= 4, avg= 1.75, stdev= 1.50, samples=4 write: IOPS=0, BW=848KiB/s (868kB/s)(5120KiB/6037msec); 0 zone resets clat (msec): min=99, max=479, avg=248.31, stdev=148.26 lat (msec): min=99, max=479, avg=248.42, stdev=148.26 clat percentiles (msec): | 1.00th=[ 101], 5.00th=[ 101], 10.00th=[ 101], 20.00th=[ 101], | 30.00th=[ 148], 40.00th=[ 148], 50.00th=[ 224], 60.00th=[ 224], | 70.00th=[ 292], 80.00th=[ 292], 90.00th=[ 481], 95.00th=[ 481], | 99.00th=[ 481], 99.50th=[ 481], 99.90th=[ 481], 99.95th=[ 481], | 99.99th=[ 481] bw ( KiB/s): min= 1762, max= 4063, per=72.18%, avg=2441.00, stdev=1086.38, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 100=8.33%, 250=50.00%, 500=16.67%, 750=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=2.22%, ctx=50, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179511: Tue Sep 15 00:12:43 2026 read: IOPS=0, BW=268KiB/s (274kB/s)(2048KiB/7656msec) clat (msec): min=87, max=323, avg=205.47, stdev=166.69 lat (msec): min=87, max=323, avg=205.48, stdev=166.69 clat percentiles (msec): | 1.00th=[ 88], 5.00th=[ 88], 10.00th=[ 88], 20.00th=[ 88], | 30.00th=[ 88], 40.00th=[ 88], 50.00th=[ 88], 60.00th=[ 326], | 70.00th=[ 326], 80.00th=[ 326], 90.00th=[ 326], 95.00th=[ 326], | 99.00th=[ 326], 99.50th=[ 326], 99.90th=[ 326], 99.95th=[ 326], | 99.99th=[ 326] bw ( KiB/s): min= 1442, max= 1762, per=66.34%, avg=1602.00, stdev=226.27, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1338KiB/s (1370kB/s)(10.0MiB/7656msec); 0 zone resets clat (msec): min=168, max=2989, avg=719.34, stdev=825.86 lat (msec): min=169, max=2989, avg=719.59, stdev=825.80 clat percentiles (msec): | 1.00th=[ 169], 5.00th=[ 169], 10.00th=[ 169], 20.00th=[ 194], | 30.00th=[ 309], 40.00th=[ 380], 50.00th=[ 464], 60.00th=[ 550], | 70.00th=[ 575], 80.00th=[ 776], 90.00th=[ 785], 95.00th=[ 3004], | 99.00th=[ 3004], 99.50th=[ 3004], 99.90th=[ 3004], 99.95th=[ 3004], | 99.99th=[ 3004] bw ( KiB/s): min= 1442, max= 4031, per=63.66%, avg=2152.88, stdev=784.90, samples=8 iops : min= 1, max= 3, avg= 1.25, stdev= 0.71, samples=8 lat (msec) : 100=8.33%, 250=16.67%, 500=33.33%, 750=16.67%, 1000=16.67% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=4.30%, ctx=131, 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=179512: Tue Sep 15 00:12:43 2026 read: IOPS=0, BW=807KiB/s (827kB/s)(6144KiB/7609msec) clat (msec): min=112, max=297, avg=249.02, stdev=71.33 lat (msec): min=112, max=297, avg=249.02, stdev=71.33 clat percentiles (msec): | 1.00th=[ 113], 5.00th=[ 113], 10.00th=[ 113], 20.00th=[ 232], | 30.00th=[ 232], 40.00th=[ 264], 50.00th=[ 264], 60.00th=[ 292], | 70.00th=[ 296], 80.00th=[ 296], 90.00th=[ 296], 95.00th=[ 296], | 99.00th=[ 296], 99.50th=[ 296], 99.90th=[ 296], 99.95th=[ 296], | 99.99th=[ 296] bw ( KiB/s): min= 1762, max= 3849, per=99.76%, avg=2409.25, stdev=967.10, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=807KiB/s (827kB/s)(6144KiB/7609msec); 0 zone resets clat (msec): min=199, max=3503, avg=992.36, stdev=1259.30 lat (msec): min=199, max=3503, avg=992.45, stdev=1259.29 clat percentiles (msec): | 1.00th=[ 201], 5.00th=[ 201], 10.00th=[ 201], 20.00th=[ 211], | 30.00th=[ 211], 40.00th=[ 489], 50.00th=[ 489], 60.00th=[ 642], | 70.00th=[ 911], 80.00th=[ 911], 90.00th=[ 3507], 95.00th=[ 3507], | 99.00th=[ 3507], 99.50th=[ 3507], 99.90th=[ 3507], 99.95th=[ 3507], | 99.99th=[ 3507] bw ( KiB/s): min= 1452, max= 2015, per=54.66%, avg=1848.67, stdev=214.87, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (msec) : 250=33.33%, 500=41.67%, 750=8.33%, 1000=8.33%, >=2000=8.33% cpu : usr=0.03%, sys=2.79%, ctx=89, 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=179513: Tue Sep 15 00:12:43 2026 read: IOPS=0, BW=604KiB/s (618kB/s)(5120KiB/8477msec) clat (msec): min=145, max=509, avg=300.01, stdev=176.58 lat (msec): min=145, max=509, avg=300.01, stdev=176.58 clat percentiles (msec): | 1.00th=[ 146], 5.00th=[ 146], 10.00th=[ 146], 20.00th=[ 146], | 30.00th=[ 165], 40.00th=[ 165], 50.00th=[ 209], 60.00th=[ 209], | 70.00th=[ 472], 80.00th=[ 472], 90.00th=[ 510], 95.00th=[ 510], | 99.00th=[ 510], 99.50th=[ 510], 99.90th=[ 510], 99.95th=[ 510], | 99.99th=[ 510] bw ( KiB/s): min= 2011, max= 3856, per=100.00%, avg=2627.33, stdev=1064.06, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=0, BW=846KiB/s (866kB/s)(7168KiB/8477msec); 0 zone resets clat (msec): min=169, max=3717, avg=972.82, stdev=1251.03 lat (msec): min=169, max=3717, avg=972.90, stdev=1251.02 clat percentiles (msec): | 1.00th=[ 169], 5.00th=[ 169], 10.00th=[ 169], 20.00th=[ 209], | 30.00th=[ 317], 40.00th=[ 317], 50.00th=[ 535], 60.00th=[ 902], | 70.00th=[ 902], 80.00th=[ 969], 90.00th=[ 3708], 95.00th=[ 3708], | 99.00th=[ 3708], 99.50th=[ 3708], 99.90th=[ 3708], 99.95th=[ 3708], | 99.99th=[ 3708] bw ( KiB/s): min= 1514, max= 4023, per=67.03%, avg=2266.83, stdev=883.51, samples=6 iops : min= 1, max= 3, avg= 1.33, stdev= 0.82, samples=6 lat (msec) : 250=41.67%, 500=16.67%, 750=16.67%, 1000=16.67%, >=2000=8.33% cpu : usr=0.02%, sys=3.67%, ctx=116, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2416KiB/s (2474kB/s), 268KiB/s-1187KiB/s (274kB/s-1216kB/s), io=20.0MiB (20.0MB), run=6037-8477msec WRITE: bw=3382KiB/s (3464kB/s), 807KiB/s-1338KiB/s (827kB/s-1370kB/s), io=28.0MiB (29.4MB), run=6037-8477msec 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=179526: Tue Sep 15 00:12:57 2026 read: IOPS=0, BW=3314KiB/s (3393kB/s)(12.0MiB/3708msec) clat (msec): min=848, max=1718, avg=1170.14, stdev=477.30 lat (msec): min=848, max=1718, avg=1170.15, stdev=477.30 clat percentiles (msec): | 1.00th=[ 852], 5.00th=[ 852], 10.00th=[ 852], 20.00th=[ 852], | 30.00th=[ 852], 40.00th=[ 944], 50.00th=[ 944], 60.00th=[ 944], | 70.00th=[ 1720], 80.00th=[ 1720], 90.00th=[ 1720], 95.00th=[ 1720], | 99.00th=[ 1720], 99.50th=[ 1720], 99.90th=[ 1720], 99.95th=[ 1720], | 99.99th=[ 1720] bw ( KiB/s): min= 8126, max= 8159, per=100.00%, avg=8142.50, stdev=23.33, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=66.67%, 2000=33.33% cpu : usr=0.00%, sys=2.94%, ctx=66, 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=179527: Tue Sep 15 00:12:57 2026 read: IOPS=0, BW=1995KiB/s (2043kB/s)(4096KiB/2053msec) clat (nsec): min=270405k, max=270405k, avg=270405083.00, stdev= 0.00 lat (nsec): min=270406k, max=270406k, avg=270406000.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 271], 5.00th=[ 271], 10.00th=[ 271], 20.00th=[ 271], | 30.00th=[ 271], 40.00th=[ 271], 50.00th=[ 271], 60.00th=[ 271], | 70.00th=[ 271], 80.00th=[ 271], 90.00th=[ 271], 95.00th=[ 271], | 99.00th=[ 271], 99.50th=[ 271], 99.90th=[ 271], 99.95th=[ 271], | 99.99th=[ 271] bw ( KiB/s): min= 6522, max= 6522, per=100.00%, avg=6522.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3990KiB/s (4086kB/s)(8192KiB/2053msec); 0 zone resets clat (msec): min=347, max=1199, avg=773.40, stdev=602.08 lat (msec): min=349, max=1201, avg=775.20, stdev=602.30 clat percentiles (msec): | 1.00th=[ 347], 5.00th=[ 347], 10.00th=[ 347], 20.00th=[ 347], | 30.00th=[ 347], 40.00th=[ 347], 50.00th=[ 347], 60.00th=[ 1200], | 70.00th=[ 1200], 80.00th=[ 1200], 90.00th=[ 1200], 95.00th=[ 1200], | 99.00th=[ 1200], 99.50th=[ 1200], 99.90th=[ 1200], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 8126, max= 8126, per=70.78%, 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=4.24%, ctx=63, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179528: Tue Sep 15 00:12:57 2026 write: IOPS=1, BW=5988KiB/s (6132kB/s)(12.0MiB/2052msec); 0 zone resets clat (msec): min=365, max=891, avg=602.09, stdev=266.72 lat (msec): min=365, max=892, avg=603.79, stdev=267.16 clat percentiles (msec): | 1.00th=[ 368], 5.00th=[ 368], 10.00th=[ 368], 20.00th=[ 368], | 30.00th=[ 368], 40.00th=[ 550], 50.00th=[ 550], 60.00th=[ 550], | 70.00th=[ 894], 80.00th=[ 894], 90.00th=[ 894], 95.00th=[ 894], | 99.00th=[ 894], 99.50th=[ 894], 99.90th=[ 894], 99.95th=[ 894], | 99.99th=[ 894] bw ( KiB/s): min= 8126, max= 8159, per=70.92%, avg=8142.50, stdev=23.33, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=33.33%, 1000=33.33% cpu : usr=0.00%, sys=7.07%, ctx=46, 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=179529: Tue Sep 15 00:12:57 2026 write: IOPS=1, BW=4306KiB/s (4409kB/s)(12.0MiB/2854msec); 0 zone resets clat (msec): min=287, max=2079, avg=885.06, stdev=1034.55 lat (msec): min=287, max=2081, avg=886.00, stdev=1035.64 clat percentiles (msec): | 1.00th=[ 288], 5.00th=[ 288], 10.00th=[ 288], 20.00th=[ 288], | 30.00th=[ 288], 40.00th=[ 288], 50.00th=[ 288], 60.00th=[ 288], | 70.00th=[ 2072], 80.00th=[ 2072], 90.00th=[ 2072], 95.00th=[ 2072], | 99.00th=[ 2072], 99.50th=[ 2072], 99.90th=[ 2072], 99.95th=[ 2072], | 99.99th=[ 2072] bw ( KiB/s): min= 7013, max= 8126, per=65.93%, avg=7569.50, 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=4.28%, ctx=58, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=4419KiB/s (4525kB/s), 1995KiB/s-3314KiB/s (2043kB/s-3393kB/s), io=16.0MiB (16.8MB), run=2053-3708msec WRITE: bw=11.2MiB/s (11.8MB/s), 3990KiB/s-5988KiB/s (4086kB/s-6132kB/s), io=32.0MiB (33.6MB), run=2052-2854msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179531: Tue Sep 15 00:12:58 2026 read: IOPS=1, BW=4809KiB/s (4925kB/s)(12.0MiB/2555msec) clat (msec): min=810, max=911, avg=851.16, stdev=53.37 lat (msec): min=810, max=911, avg=851.16, stdev=53.37 clat percentiles (msec): | 1.00th=[ 810], 5.00th=[ 810], 10.00th=[ 810], 20.00th=[ 810], | 30.00th=[ 810], 40.00th=[ 835], 50.00th=[ 835], 60.00th=[ 835], | 70.00th=[ 911], 80.00th=[ 911], 90.00th=[ 911], 95.00th=[ 911], | 99.00th=[ 911], 99.50th=[ 911], 99.90th=[ 911], 99.95th=[ 911], | 99.99th=[ 911] bw ( KiB/s): min= 8094, max= 8159, per=100.00%, avg=8126.50, stdev=45.96, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=100.00% cpu : usr=0.08%, sys=13.63%, ctx=206, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179532: Tue Sep 15 00:12:58 2026 read: IOPS=0, BW=1457KiB/s (1492kB/s)(4096KiB/2812msec) clat (nsec): min=698659k, max=698659k, avg=698659142.00, stdev= 0.00 lat (nsec): min=698660k, max=698660k, avg=698660421.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 701], 5.00th=[ 701], 10.00th=[ 701], 20.00th=[ 701], | 30.00th=[ 701], 40.00th=[ 701], 50.00th=[ 701], 60.00th=[ 701], | 70.00th=[ 701], 80.00th=[ 701], 90.00th=[ 701], 95.00th=[ 701], | 99.00th=[ 701], 99.50th=[ 701], 99.90th=[ 701], 99.95th=[ 701], | 99.99th=[ 701] bw ( KiB/s): min= 5595, max= 5595, per=96.04%, avg=5595.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2913KiB/s (2983kB/s)(8192KiB/2812msec); 0 zone resets clat (msec): min=839, max=1270, avg=1054.88, stdev=305.22 lat (msec): min=839, max=1271, avg=1055.47, stdev=305.84 clat percentiles (msec): | 1.00th=[ 844], 5.00th=[ 844], 10.00th=[ 844], 20.00th=[ 844], | 30.00th=[ 844], 40.00th=[ 844], 50.00th=[ 844], 60.00th=[ 1267], | 70.00th=[ 1267], 80.00th=[ 1267], 90.00th=[ 1267], 95.00th=[ 1267], | 99.00th=[ 1267], 99.50th=[ 1267], 99.90th=[ 1267], 99.95th=[ 1267], | 99.99th=[ 1267] bw ( KiB/s): min= 8110, max= 8110, per=75.09%, avg=8110.00, 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=0.00%, sys=4.45%, ctx=107, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179533: Tue Sep 15 00:12:58 2026 write: IOPS=0, BW=4050KiB/s (4147kB/s)(12.0MiB/3034msec); 0 zone resets clat (msec): min=707, max=1469, avg=1010.05, stdev=404.92 lat (msec): min=707, max=1470, avg=1010.57, stdev=405.12 clat percentiles (msec): | 1.00th=[ 709], 5.00th=[ 709], 10.00th=[ 709], 20.00th=[ 709], | 30.00th=[ 709], 40.00th=[ 852], 50.00th=[ 852], 60.00th=[ 852], | 70.00th=[ 1469], 80.00th=[ 1469], 90.00th=[ 1469], 95.00th=[ 1469], | 99.00th=[ 1469], 99.50th=[ 1469], 99.90th=[ 1469], 99.95th=[ 1469], | 99.99th=[ 1469] bw ( KiB/s): min= 8078, max= 8175, per=75.25%, avg=8126.50, stdev=68.59, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=5.47%, ctx=84, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179534: Tue Sep 15 00:12:58 2026 write: IOPS=1, BW=4516KiB/s (4624kB/s)(12.0MiB/2721msec); 0 zone resets clat (msec): min=228, max=1283, avg=906.35, stdev=588.30 lat (msec): min=228, max=1283, avg=906.68, stdev=588.25 clat percentiles (msec): | 1.00th=[ 228], 5.00th=[ 228], 10.00th=[ 228], 20.00th=[ 228], | 30.00th=[ 228], 40.00th=[ 1200], 50.00th=[ 1200], 60.00th=[ 1200], | 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= 8110, per=75.09%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.12%, ctx=42, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=5826KiB/s (5966kB/s), 1457KiB/s-4809KiB/s (1492kB/s-4925kB/s), io=16.0MiB (16.8MB), run=2555-2812msec WRITE: bw=10.5MiB/s (11.1MB/s), 2913KiB/s-4516KiB/s (2983kB/s-4624kB/s), io=32.0MiB (33.6MB), run=2721-3034msec