== sanity test 398b: DIO and buffer IO race ============== 07:20:47 (1787397647) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 4.49383 s, 11.2 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=146536: Sat Aug 22 07:23:12 2026 read: IOPS=11, BW=47.2KiB/s (48.4kB/s)(5992KiB/126868msec) clat (usec): min=39, max=355948, avg=42823.74, stdev=31379.87 lat (usec): min=39, max=355950, avg=42825.75, stdev=31380.00 clat percentiles (usec): | 1.00th=[ 60], 5.00th=[ 77], 10.00th=[ 14877], 20.00th=[ 22152], | 30.00th=[ 26870], 40.00th=[ 32113], 50.00th=[ 37487], 60.00th=[ 42730], | 70.00th=[ 51119], 80.00th=[ 61604], 90.00th=[ 76022], 95.00th=[ 93848], | 99.00th=[143655], 99.50th=[175113], 99.90th=[350225], 99.95th=[354419], | 99.99th=[354419] bw ( KiB/s): min= 7, max= 110, per=25.33%, avg=47.11, stdev=19.59, samples=248 iops : min= 1, max= 27, avg=11.10, stdev= 4.92, samples=248 write: IOPS=12, BW=49.6KiB/s (50.8kB/s)(6296KiB/126868msec); 0 zone resets clat (usec): min=1129, max=1008.0k, avg=39487.85, stdev=45322.65 lat (usec): min=1130, max=1008.0k, avg=39516.07, stdev=45357.03 clat percentiles (usec): | 1.00th=[ 1385], 5.00th=[ 1631], 10.00th=[ 2540], | 20.00th=[ 5538], 30.00th=[ 10814], 40.00th=[ 20841], | 50.00th=[ 29754], 60.00th=[ 39060], 70.00th=[ 50594], | 80.00th=[ 64750], 90.00th=[ 89654], 95.00th=[ 113771], | 99.00th=[ 164627], 99.50th=[ 196084], 99.90th=[ 291505], | 99.95th=[1010828], 99.99th=[1010828] bw ( KiB/s): min= 7, max= 127, per=25.37%, avg=49.48, stdev=20.59, samples=248 iops : min= 1, max= 31, avg=11.70, stdev= 5.17, samples=248 lat (usec) : 50=0.07%, 100=3.06%, 250=0.29%, 500=0.07%, 750=0.13% lat (msec) : 2=4.00%, 4=3.94%, 10=7.03%, 20=9.18%, 50=41.60% lat (msec) : 100=25.10%, 250=5.24%, 500=0.26%, 2000=0.03% cpu : usr=0.08%, sys=5.51%, ctx=6925, 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=146537: Sat Aug 22 07:23:12 2026 read: IOPS=11, BW=46.7KiB/s (47.8kB/s)(5940KiB/127177msec) clat (usec): min=44, max=593119, avg=43630.72, stdev=31331.97 lat (usec): min=44, max=593122, avg=43632.74, stdev=31331.87 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 78], 10.00th=[ 15533], 20.00th=[ 22152], | 30.00th=[ 27132], 40.00th=[ 31851], 50.00th=[ 38011], 60.00th=[ 44827], | 70.00th=[ 53216], 80.00th=[ 63177], 90.00th=[ 79168], 95.00th=[ 95945], | 99.00th=[129500], 99.50th=[156238], 99.90th=[198181], 99.95th=[591397], | 99.99th=[591397] bw ( KiB/s): min= 6, max= 95, per=24.97%, avg=46.44, stdev=18.51, samples=250 iops : min= 1, max= 23, avg=10.92, stdev= 4.63, samples=250 write: IOPS=12, BW=49.9KiB/s (51.1kB/s)(6348KiB/127177msec); 0 zone resets clat (usec): min=966, max=986581, avg=38959.27, stdev=44722.32 lat (usec): min=968, max=986583, avg=38962.69, stdev=44722.42 clat percentiles (usec): | 1.00th=[ 1319], 5.00th=[ 1631], 10.00th=[ 2507], 20.00th=[ 5604], | 30.00th=[ 10028], 40.00th=[ 20317], 50.00th=[ 30278], 60.00th=[ 40109], | 70.00th=[ 49546], 80.00th=[ 64226], 90.00th=[ 85459], 95.00th=[107480], | 99.00th=[173016], 99.50th=[210764], 99.90th=[312476], 99.95th=[985662], | 99.99th=[985662] bw ( KiB/s): min= 7, max= 127, per=25.55%, avg=49.82, stdev=20.94, samples=249 iops : min= 1, max= 31, avg=11.78, stdev= 5.27, samples=249 lat (usec) : 50=0.13%, 100=2.60%, 250=0.36%, 750=0.03%, 1000=0.10% lat (msec) : 2=4.10%, 4=4.00%, 10=7.52%, 20=9.18%, 50=40.66% lat (msec) : 100=25.75%, 250=5.37%, 500=0.13%, 750=0.03%, 1000=0.03% cpu : usr=0.09%, sys=5.39%, ctx=6910, 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=146538: Sat Aug 22 07:23:12 2026 read: IOPS=11, BW=47.3KiB/s (48.5kB/s)(6028KiB/127389msec) clat (usec): min=29, max=424979, avg=41818.79, stdev=30111.07 lat (usec): min=29, max=424981, avg=41822.50, stdev=30112.47 clat percentiles (usec): | 1.00th=[ 57], 5.00th=[ 71], 10.00th=[ 12649], 20.00th=[ 21103], | 30.00th=[ 25560], 40.00th=[ 31065], 50.00th=[ 36439], 60.00th=[ 43254], | 70.00th=[ 51643], 80.00th=[ 60556], 90.00th=[ 76022], 95.00th=[ 89654], | 99.00th=[129500], 99.50th=[173016], 99.90th=[287310], 99.95th=[425722], | 99.99th=[425722] bw ( KiB/s): min= 7, max= 111, per=25.68%, avg=47.76, stdev=20.25, samples=246 iops : min= 1, max= 27, avg=11.26, stdev= 5.10, samples=246 write: IOPS=12, BW=49.1KiB/s (50.3kB/s)(6260KiB/127389msec); 0 zone resets clat (usec): min=1157, max=1201.9k, avg=40723.39, stdev=51431.24 lat (usec): min=1160, max=1201.9k, avg=40731.39, stdev=51429.59 clat percentiles (usec): | 1.00th=[ 1369], 5.00th=[ 1647], 10.00th=[ 2278], | 20.00th=[ 5407], 30.00th=[ 10159], 40.00th=[ 20055], | 50.00th=[ 28443], 60.00th=[ 38011], 70.00th=[ 52691], | 80.00th=[ 67634], 90.00th=[ 90702], 95.00th=[ 114820], | 99.00th=[ 196084], 99.50th=[ 270533], 99.90th=[ 354419], | 99.95th=[1199571], 99.99th=[1199571] bw ( KiB/s): min= 7, max= 119, per=25.13%, avg=49.01, stdev=22.59, samples=249 iops : min= 1, max= 29, avg=11.57, stdev= 5.67, samples=249 lat (usec) : 50=0.26%, 100=3.32%, 250=0.42%, 500=0.07%, 750=0.03% lat (usec) : 1000=0.07% lat (msec) : 2=4.49%, 4=3.91%, 10=6.93%, 20=9.67%, 50=39.29% lat (msec) : 100=26.27%, 250=4.95%, 500=0.29%, 2000=0.03% cpu : usr=0.09%, sys=5.37%, ctx=6731, 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=146539: Sat Aug 22 07:23:12 2026 read: IOPS=11, BW=47.1KiB/s (48.2kB/s)(6052KiB/128553msec) clat (usec): min=32, max=1052.5k, avg=42162.36, stdev=38608.88 lat (usec): min=32, max=1052.5k, avg=42167.22, stdev=38609.33 clat percentiles (usec): | 1.00th=[ 57], 5.00th=[ 75], 10.00th=[ 12649], | 20.00th=[ 20579], 30.00th=[ 25822], 40.00th=[ 30802], | 50.00th=[ 36439], 60.00th=[ 43254], 70.00th=[ 50070], | 80.00th=[ 62653], 90.00th=[ 78119], 95.00th=[ 91751], | 99.00th=[ 133694], 99.50th=[ 147850], 99.90th=[ 367002], | 99.95th=[1052771], 99.99th=[1052771] bw ( KiB/s): min= 6, max= 111, per=25.17%, avg=46.82, stdev=20.45, samples=250 iops : min= 1, max= 27, avg=11.03, stdev= 5.16, samples=250 write: IOPS=12, BW=48.5KiB/s (49.7kB/s)(6236KiB/128553msec); 0 zone resets clat (usec): min=1115, max=622704, avg=41162.76, stdev=43726.39 lat (usec): min=1117, max=622709, avg=41165.33, stdev=43726.44 clat percentiles (usec): | 1.00th=[ 1385], 5.00th=[ 1647], 10.00th=[ 2704], 20.00th=[ 6128], | 30.00th=[ 11338], 40.00th=[ 21365], 50.00th=[ 30278], 60.00th=[ 41157], | 70.00th=[ 53216], 80.00th=[ 68682], 90.00th=[ 91751], 95.00th=[114820], | 99.00th=[183501], 99.50th=[229639], 99.90th=[408945], 99.95th=[624952], | 99.99th=[624952] bw ( KiB/s): min= 7, max= 127, per=24.60%, avg=47.97, stdev=20.52, samples=252 iops : min= 1, max= 31, avg=11.31, stdev= 5.15, samples=252 lat (usec) : 50=0.26%, 100=2.96%, 250=0.78%, 500=0.10%, 750=0.07% lat (usec) : 1000=0.03% lat (msec) : 2=3.78%, 4=3.52%, 10=7.19%, 20=10.32%, 50=39.45% lat (msec) : 100=26.17%, 250=5.08%, 500=0.23%, 750=0.03%, 2000=0.03% cpu : usr=0.10%, sys=5.31%, ctx=6894, 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=187KiB/s (191kB/s), 46.7KiB/s-47.3KiB/s (47.8kB/s-48.5kB/s), io=23.4MiB (24.6MB), run=126868-128553msec WRITE: bw=196KiB/s (200kB/s), 48.5KiB/s-49.9KiB/s (49.7kB/s-51.1kB/s), io=24.6MiB (25.7MB), run=126868-128553msec fio: pid=146544, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=146541: Sat Aug 22 07:25:12 2026 read: IOPS=6, BW=24.2KiB/s (24.8kB/s)(5992KiB/247875msec) clat (msec): min=5, max=1025, avg=36.61, stdev=42.81 lat (msec): min=5, max=1025, avg=36.62, stdev=42.81 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 30], | 70.00th=[ 38], 80.00th=[ 51], 90.00th=[ 77], 95.00th=[ 103], | 99.00th=[ 171], 99.50th=[ 230], 99.90th=[ 330], 99.95th=[ 1028], | 99.99th=[ 1028] bw ( KiB/s): min= 7, max= 103, per=30.48%, avg=27.13, stdev=17.83, samples=428 iops : min= 1, max= 25, avg= 6.14, stdev= 4.50, samples=428 write: IOPS=6, BW=25.4KiB/s (26.0kB/s)(6296KiB/247875msec); 0 zone resets clat (msec): min=33, max=597, avg=122.32, stdev=62.67 lat (msec): min=33, max=597, avg=122.32, stdev=62.67 clat percentiles (msec): | 1.00th=[ 43], 5.00th=[ 54], 10.00th=[ 61], 20.00th=[ 72], | 30.00th=[ 84], 40.00th=[ 94], 50.00th=[ 108], 60.00th=[ 122], | 70.00th=[ 140], 80.00th=[ 165], 90.00th=[ 205], 95.00th=[ 247], | 99.00th=[ 330], 99.50th=[ 368], 99.90th=[ 426], 99.95th=[ 600], | 99.99th=[ 600] bw ( KiB/s): min= 7, max= 64, per=27.08%, avg=25.18, stdev=12.41, samples=483 iops : min= 1, max= 16, avg= 5.65, stdev= 3.13, samples=483 lat (msec) : 10=3.16%, 20=16.02%, 50=21.52%, 100=28.65%, 250=28.16% lat (msec) : 500=2.44%, 750=0.03%, 2000=0.03% cpu : usr=0.06%, sys=1.58%, ctx=5527, 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=146542: Sat Aug 22 07:25:12 2026 read: IOPS=5, BW=23.9KiB/s (24.5kB/s)(5940KiB/248663msec) clat (msec): min=5, max=1102, avg=36.83, stdev=45.55 lat (msec): min=5, max=1102, avg=36.83, stdev=45.55 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 30], | 70.00th=[ 37], 80.00th=[ 51], 90.00th=[ 75], 95.00th=[ 103], | 99.00th=[ 186], 99.50th=[ 232], 99.90th=[ 380], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 7, max= 119, per=30.36%, avg=27.02, stdev=18.34, samples=425 iops : min= 1, max= 29, avg= 6.12, stdev= 4.62, samples=425 write: IOPS=6, BW=25.5KiB/s (26.1kB/s)(6348KiB/248663msec); 0 zone resets clat (msec): min=33, max=616, avg=121.95, stdev=63.32 lat (msec): min=33, max=616, avg=121.96, stdev=63.32 clat percentiles (msec): | 1.00th=[ 42], 5.00th=[ 53], 10.00th=[ 61], 20.00th=[ 72], | 30.00th=[ 83], 40.00th=[ 95], 50.00th=[ 109], 60.00th=[ 123], | 70.00th=[ 138], 80.00th=[ 165], 90.00th=[ 201], 95.00th=[ 241], | 99.00th=[ 326], 99.50th=[ 401], 99.90th=[ 600], 99.95th=[ 617], | 99.99th=[ 617] bw ( KiB/s): min= 7, max= 64, per=27.02%, avg=25.13, stdev=12.40, samples=487 iops : min= 1, max= 16, avg= 5.63, stdev= 3.13, samples=487 lat (msec) : 10=3.19%, 20=16.02%, 50=21.22%, 100=27.96%, 250=29.10% lat (msec) : 500=2.41%, 750=0.07%, 2000=0.03% cpu : usr=0.06%, sys=1.60%, ctx=5587, 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=146543: Sat Aug 22 07:25:12 2026 read: IOPS=6, BW=24.5KiB/s (25.1kB/s)(6028KiB/245703msec) clat (msec): min=5, max=385, avg=36.94, stdev=37.44 lat (msec): min=5, max=385, avg=36.95, stdev=37.45 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 31], | 70.00th=[ 39], 80.00th=[ 51], 90.00th=[ 75], 95.00th=[ 101], | 99.00th=[ 192], 99.50th=[ 259], 99.90th=[ 351], 99.95th=[ 388], | 99.99th=[ 388] bw ( KiB/s): min= 7, max= 93, per=29.89%, avg=26.60, stdev=17.09, samples=438 iops : min= 1, max= 23, avg= 6.00, stdev= 4.31, samples=438 write: IOPS=6, BW=25.5KiB/s (26.1kB/s)(6260KiB/245703msec); 0 zone resets clat (msec): min=34, max=1203, avg=121.15, stdev=68.01 lat (msec): min=34, max=1203, avg=121.16, stdev=68.02 clat percentiles (msec): | 1.00th=[ 43], 5.00th=[ 53], 10.00th=[ 59], 20.00th=[ 71], | 30.00th=[ 82], 40.00th=[ 92], 50.00th=[ 105], 60.00th=[ 117], | 70.00th=[ 138], 80.00th=[ 163], 90.00th=[ 207], 95.00th=[ 253], | 99.00th=[ 321], 99.50th=[ 368], 99.90th=[ 472], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 7, max= 64, per=27.24%, avg=25.33, stdev=12.61, samples=476 iops : min= 1, max= 16, avg= 5.69, stdev= 3.19, samples=476 lat (msec) : 10=3.65%, 20=14.75%, 50=22.46%, 100=29.62%, 250=26.63% lat (msec) : 500=2.86%, 2000=0.03% cpu : usr=0.06%, sys=1.55%, ctx=5494, 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=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=146544: Sat Aug 22 07:25:12 2026 read: IOPS=5, BW=22.4KiB/s (22.0kB/s)(4316KiB/192537msec) clat (msec): min=6, max=521, avg=39.57, stdev=41.33 lat (msec): min=6, max=521, avg=39.58, stdev=41.33 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 26], 60.00th=[ 32], | 70.00th=[ 42], 80.00th=[ 57], 90.00th=[ 87], 95.00th=[ 114], | 99.00th=[ 213], 99.50th=[ 275], 99.90th=[ 347], 99.95th=[ 523], | 99.99th=[ 523] bw ( KiB/s): min= 7, max= 111, per=28.22%, avg=25.11, stdev=17.52, samples=332 iops : min= 1, max= 27, avg= 5.63, stdev= 4.40, samples=332 write: IOPS=5, BW=23.2KiB/s (23.8kB/s)(4468KiB/192537msec); 0 zone resets clat (msec): min=28, max=1038, avg=133.71, stdev=76.60 lat (msec): min=28, max=1038, avg=133.71, stdev=76.60 clat percentiles (msec): | 1.00th=[ 41], 5.00th=[ 54], 10.00th=[ 62], 20.00th=[ 75], | 30.00th=[ 88], 40.00th=[ 102], 50.00th=[ 117], 60.00th=[ 136], | 70.00th=[ 157], 80.00th=[ 184], 90.00th=[ 222], 95.00th=[ 264], | 99.00th=[ 363], 99.50th=[ 435], 99.90th=[ 642], 99.95th=[ 1036], | 99.99th=[ 1036] bw ( KiB/s): min= 7, max= 63, per=24.85%, avg=23.11, stdev=12.25, samples=372 iops : min= 1, max= 15, avg= 5.12, stdev= 3.11, samples=372 lat (msec) : 10=2.96%, 20=16.20%, 50=20.07%, 100=26.22%, 250=31.22% lat (msec) : 500=3.05%, 750=0.18%, 2000=0.05% cpu : usr=0.05%, sys=1.40%, ctx=3576, majf=0, minf=20 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=1080,1117,0,0 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=89.6KiB/s (91.7kB/s), 22.4KiB/s-24.5KiB/s (22.0kB/s-25.1kB/s), io=21.8MiB (22.8MB), run=192537-248663msec WRITE: bw=93.0KiB/s (96.2kB/s), 23.2KiB/s-25.5KiB/s (23.8kB/s-26.1kB/s), io=22.8MiB (23.9MB), run=192537-248663msec 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=146610: Sat Aug 22 07:25:54 2026 read: IOPS=11, BW=188KiB/s (192kB/s)(5920KiB/31495msec) clat (usec): min=38, max=189437, avg=40353.50, stdev=32807.35 lat (usec): min=38, max=189438, avg=40355.34, stdev=32807.28 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 63], 10.00th=[ 77], 20.00th=[ 143], | 30.00th=[ 24249], 40.00th=[ 30278], 50.00th=[ 38536], 60.00th=[ 45351], | 70.00th=[ 54264], 80.00th=[ 65799], 90.00th=[ 81265], 95.00th=[ 94897], | 99.00th=[143655], 99.50th=[181404], 99.90th=[189793], 99.95th=[189793], | 99.99th=[189793] bw ( KiB/s): min= 61, max= 537, per=26.14%, avg=190.33, stdev=84.59, samples=61 iops : min= 3, max= 33, avg=11.11, stdev= 5.36, samples=61 write: IOPS=12, BW=202KiB/s (207kB/s)(6368KiB/31495msec); 0 zone resets clat (usec): min=1566, max=215574, avg=40540.88, stdev=39656.67 lat (usec): min=1567, max=215577, avg=40548.76, stdev=39653.84 clat percentiles (usec): | 1.00th=[ 1893], 5.00th=[ 2671], 10.00th=[ 4359], 20.00th=[ 7439], | 30.00th=[ 11076], 40.00th=[ 18744], 50.00th=[ 28705], 60.00th=[ 37487], | 70.00th=[ 48497], 80.00th=[ 72877], 90.00th=[100140], 95.00th=[122160], | 99.00th=[185598], 99.50th=[187696], 99.90th=[214959], 99.95th=[214959], | 99.99th=[214959] bw ( KiB/s): min= 63, max= 415, per=26.81%, avg=205.39, stdev=74.43, samples=61 iops : min= 3, max= 25, avg=12.07, stdev= 4.69, samples=61 lat (usec) : 50=1.04%, 100=7.42%, 250=1.95%, 500=0.26%, 1000=0.26% lat (msec) : 2=1.04%, 4=4.04%, 10=9.51%, 20=7.81%, 50=35.42% lat (msec) : 100=24.09%, 250=7.16% cpu : usr=0.10%, sys=6.28%, ctx=1575, 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=146612: Sat Aug 22 07:25:54 2026 read: IOPS=10, BW=175KiB/s (179kB/s)(5744KiB/32879msec) clat (usec): min=50, max=227300, avg=48423.65, stdev=37471.55 lat (usec): min=50, max=227303, avg=48428.33, stdev=37469.88 clat percentiles (usec): | 1.00th=[ 57], 5.00th=[ 75], 10.00th=[ 90], 20.00th=[ 21890], | 30.00th=[ 31065], 40.00th=[ 35914], 50.00th=[ 44827], 60.00th=[ 50594], | 70.00th=[ 60031], 80.00th=[ 71828], 90.00th=[ 92799], 95.00th=[113771], | 99.00th=[183501], 99.50th=[212861], 99.90th=[227541], 99.95th=[227541], | 99.99th=[227541] bw ( KiB/s): min= 31, max= 349, per=23.80%, avg=173.30, stdev=78.01, samples=64 iops : min= 1, max= 21, avg=10.05, stdev= 4.97, samples=64 write: IOPS=12, BW=199KiB/s (204kB/s)(6544KiB/32879msec); 0 zone resets clat (usec): min=1515, max=196876, avg=36892.32, stdev=39201.59 lat (usec): min=1517, max=196880, avg=36906.91, stdev=39193.36 clat percentiles (usec): | 1.00th=[ 1860], 5.00th=[ 2180], 10.00th=[ 3392], 20.00th=[ 5538], | 30.00th=[ 7767], 40.00th=[ 11731], 50.00th=[ 23462], 60.00th=[ 33817], | 70.00th=[ 47973], 80.00th=[ 66323], 90.00th=[ 94897], 95.00th=[126354], | 99.00th=[154141], 99.50th=[185598], 99.90th=[196084], 99.95th=[196084], | 99.99th=[196084] bw ( KiB/s): min= 31, max= 510, per=25.99%, avg=199.05, stdev=95.00, samples=63 iops : min= 1, max= 31, avg=11.65, stdev= 6.01, samples=63 lat (usec) : 100=5.08%, 250=1.30%, 500=0.52%, 1000=0.26% lat (msec) : 2=2.47%, 4=5.47%, 10=11.33%, 20=7.94%, 50=31.38% lat (msec) : 100=26.82%, 250=7.42% cpu : usr=0.11%, sys=5.90%, ctx=1623, 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=146614: Sat Aug 22 07:25:54 2026 read: IOPS=12, BW=195KiB/s (200kB/s)(6256KiB/32008msec) clat (usec): min=39, max=224269, avg=46882.68, stdev=35963.61 lat (usec): min=39, max=224270, avg=46884.49, stdev=35963.96 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 71], 10.00th=[ 85], 20.00th=[ 18220], | 30.00th=[ 29754], 40.00th=[ 36439], 50.00th=[ 43254], 60.00th=[ 52167], | 70.00th=[ 60556], 80.00th=[ 70779], 90.00th=[ 91751], 95.00th=[113771], | 99.00th=[179307], 99.50th=[212861], 99.90th=[223347], 99.95th=[223347], | 99.99th=[223347] bw ( KiB/s): min= 62, max= 413, per=26.89%, avg=195.75, stdev=78.53, samples=63 iops : min= 3, max= 25, avg=11.46, stdev= 4.97, samples=63 write: IOPS=11, BW=188KiB/s (193kB/s)(6032KiB/32008msec); 0 zone resets clat (usec): min=1607, max=249077, avg=35984.27, stdev=37918.53 lat (usec): min=1611, max=249079, avg=36012.14, stdev=37932.73 clat percentiles (usec): | 1.00th=[ 1926], 5.00th=[ 2540], 10.00th=[ 3687], 20.00th=[ 6259], | 30.00th=[ 9110], 40.00th=[ 14746], 50.00th=[ 21627], 60.00th=[ 31851], | 70.00th=[ 41681], 80.00th=[ 65274], 90.00th=[ 87557], 95.00th=[112722], | 99.00th=[179307], 99.50th=[187696], 99.90th=[248513], 99.95th=[248513], | 99.99th=[248513] bw ( KiB/s): min= 60, max= 374, per=24.75%, avg=189.56, stdev=79.64, samples=62 iops : min= 3, max= 23, avg=11.08, stdev= 5.07, samples=62 lat (usec) : 50=0.39%, 100=5.86%, 250=2.34%, 500=0.13%, 750=0.13% lat (msec) : 2=1.04%, 4=4.82%, 10=10.16%, 20=9.38%, 50=31.12% lat (msec) : 100=27.73%, 250=6.90% cpu : usr=0.07%, sys=5.81%, ctx=1583, 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=146615: Sat Aug 22 07:25:54 2026 read: IOPS=11, BW=190KiB/s (194kB/s)(6032KiB/31794msec) clat (usec): min=39, max=293367, avg=43373.81, stdev=38480.79 lat (usec): min=39, max=293370, avg=43375.45, stdev=38480.88 clat percentiles (usec): | 1.00th=[ 43], 5.00th=[ 70], 10.00th=[ 80], 20.00th=[ 172], | 30.00th=[ 26346], 40.00th=[ 33817], 50.00th=[ 40633], 60.00th=[ 46400], | 70.00th=[ 55313], 80.00th=[ 66323], 90.00th=[ 87557], 95.00th=[105382], | 99.00th=[177210], 99.50th=[256902], 99.90th=[291505], 99.95th=[291505], | 99.99th=[291505] bw ( KiB/s): min= 31, max= 412, per=27.17%, avg=197.76, stdev=71.81, samples=59 iops : min= 1, max= 25, avg=11.59, stdev= 4.53, samples=59 write: IOPS=12, BW=197KiB/s (201kB/s)(6256KiB/31794msec); 0 zone resets clat (usec): min=1585, max=308449, avg=38309.68, stdev=43930.22 lat (usec): min=1588, max=308452, avg=38312.92, stdev=43930.28 clat percentiles (usec): | 1.00th=[ 1876], 5.00th=[ 2212], 10.00th=[ 3982], 20.00th=[ 6652], | 30.00th=[ 9634], 40.00th=[ 14353], 50.00th=[ 23200], 60.00th=[ 32113], | 70.00th=[ 46400], 80.00th=[ 67634], 90.00th=[ 92799], 95.00th=[116917], | 99.00th=[256902], 99.50th=[291505], 99.90th=[308282], 99.95th=[308282], | 99.99th=[308282] bw ( KiB/s): min= 31, max= 381, per=25.62%, avg=196.27, stdev=85.06, samples=62 iops : min= 1, max= 23, avg=11.50, stdev= 5.38, samples=62 lat (usec) : 50=1.43%, 100=6.64%, 250=1.95%, 500=0.52%, 1000=0.13% lat (msec) : 2=1.43%, 4=4.30%, 10=10.68%, 20=8.85%, 50=32.94% lat (msec) : 100=24.22%, 250=6.12%, 500=0.78% cpu : usr=0.08%, sys=5.98%, ctx=1585, 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=728KiB/s (746kB/s), 175KiB/s-195KiB/s (179kB/s-200kB/s), io=23.4MiB (24.5MB), run=31495-32879msec WRITE: bw=766KiB/s (785kB/s), 188KiB/s-202KiB/s (193kB/s-207kB/s), io=24.6MiB (25.8MB), run=31495-32879msec fio: pid=146611, 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=146611: Sat Aug 22 07:26:29 2026 read: IOPS=5, BW=85.8KiB/s (87.9kB/s)(5472KiB/63740msec) clat (msec): min=6, max=322, avg=42.79, stdev=46.29 lat (msec): min=6, max=322, avg=42.79, stdev=46.29 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 26], 60.00th=[ 32], | 70.00th=[ 41], 80.00th=[ 57], 90.00th=[ 99], 95.00th=[ 142], | 99.00th=[ 239], 99.50th=[ 288], 99.90th=[ 321], 99.95th=[ 321], | 99.99th=[ 321] bw ( KiB/s): min= 30, max= 320, per=27.26%, avg=95.12, stdev=63.22, samples=113 iops : min= 1, max= 20, avg= 5.19, stdev= 4.03, samples=113 write: IOPS=5, BW=93.1KiB/s (95.4kB/s)(5936KiB/63740msec); 0 zone resets clat (msec): min=42, max=406, avg=131.22, stdev=68.30 lat (msec): min=42, max=406, avg=131.24, stdev=68.29 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 56], 10.00th=[ 62], 20.00th=[ 74], | 30.00th=[ 86], 40.00th=[ 95], 50.00th=[ 111], 60.00th=[ 133], | 70.00th=[ 157], 80.00th=[ 182], 90.00th=[ 224], 95.00th=[ 268], | 99.00th=[ 351], 99.50th=[ 384], 99.90th=[ 405], 99.95th=[ 405], | 99.99th=[ 405] bw ( KiB/s): min= 30, max= 221, per=25.92%, avg=95.39, stdev=50.01, samples=122 iops : min= 1, max= 13, avg= 5.19, stdev= 3.18, samples=122 lat (msec) : 10=2.24%, 20=16.39%, 50=19.61%, 100=27.59%, 250=29.97% lat (msec) : 500=4.06% cpu : usr=0.05%, sys=1.61%, ctx=1290, majf=0, minf=22 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=343,371,0,0 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=146613: Sat Aug 22 07:26:29 2026 read: IOPS=5, BW=85.5KiB/s (87.6kB/s)(5744KiB/67158msec) clat (msec): min=5, max=312, avg=40.86, stdev=44.06 lat (msec): min=5, max=312, avg=40.87, stdev=44.06 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 32], | 70.00th=[ 42], 80.00th=[ 55], 90.00th=[ 93], 95.00th=[ 136], | 99.00th=[ 232], 99.50th=[ 279], 99.90th=[ 313], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 21, max= 415, per=28.71%, avg=100.19, stdev=73.25, samples=112 iops : min= 1, max= 25, avg= 5.52, stdev= 4.60, samples=112 write: IOPS=6, BW=97.4KiB/s (99.8kB/s)(6544KiB/67158msec); 0 zone resets clat (msec): min=28, max=443, avg=127.25, stdev=63.12 lat (msec): min=28, max=443, avg=127.28, stdev=63.15 clat percentiles (msec): | 1.00th=[ 38], 5.00th=[ 52], 10.00th=[ 62], 20.00th=[ 77], | 30.00th=[ 88], 40.00th=[ 99], 50.00th=[ 112], 60.00th=[ 129], | 70.00th=[ 146], 80.00th=[ 176], 90.00th=[ 215], 95.00th=[ 253], | 99.00th=[ 313], 99.50th=[ 334], 99.90th=[ 443], 99.95th=[ 443], | 99.99th=[ 443] bw ( KiB/s): min= 21, max= 256, per=26.34%, avg=96.95, stdev=49.83, samples=132 iops : min= 1, max= 16, avg= 5.30, stdev= 3.19, samples=132 lat (msec) : 10=1.95%, 20=14.58%, 50=21.48%, 100=27.21%, 250=31.12% lat (msec) : 500=3.65% cpu : usr=0.05%, sys=1.66%, ctx=1395, 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=146616: Sat Aug 22 07:26:29 2026 read: IOPS=5, BW=95.7KiB/s (97.9kB/s)(6256KiB/65404msec) clat (msec): min=8, max=245, avg=38.74, stdev=38.14 lat (msec): min=8, max=245, avg=38.74, stdev=38.14 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 31], | 70.00th=[ 41], 80.00th=[ 53], 90.00th=[ 79], 95.00th=[ 136], | 99.00th=[ 190], 99.50th=[ 243], 99.90th=[ 247], 99.95th=[ 247], | 99.99th=[ 247] bw ( KiB/s): min= 30, max= 415, per=30.00%, avg=104.69, stdev=74.95, samples=118 iops : min= 1, max= 25, avg= 5.77, stdev= 4.77, samples=118 write: IOPS=5, BW=92.2KiB/s (94.4kB/s)(6032KiB/65404msec); 0 zone resets clat (msec): min=34, max=511, avg=132.98, stdev=72.82 lat (msec): min=34, max=511, avg=132.98, stdev=72.82 clat percentiles (msec): | 1.00th=[ 44], 5.00th=[ 57], 10.00th=[ 64], 20.00th=[ 78], | 30.00th=[ 88], 40.00th=[ 100], 50.00th=[ 112], 60.00th=[ 131], | 70.00th=[ 150], 80.00th=[ 184], 90.00th=[ 234], 95.00th=[ 271], | 99.00th=[ 384], 99.50th=[ 510], 99.90th=[ 510], 99.95th=[ 510], | 99.99th=[ 510] bw ( KiB/s): min= 31, max= 256, per=25.36%, avg=93.31, stdev=48.25, samples=127 iops : min= 1, max= 16, avg= 5.06, stdev= 3.09, samples=127 lat (msec) : 10=2.21%, 20=18.10%, 50=20.57%, 100=25.91%, 250=29.82% lat (msec) : 500=3.12%, 750=0.26% cpu : usr=0.06%, sys=1.59%, ctx=1353, 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=146617: Sat Aug 22 07:26:29 2026 read: IOPS=5, BW=91.2KiB/s (93.4kB/s)(6032KiB/66142msec) clat (msec): min=7, max=283, avg=41.18, stdev=44.60 lat (msec): min=7, max=283, avg=41.18, stdev=44.60 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 21], 50.00th=[ 27], 60.00th=[ 31], | 70.00th=[ 36], 80.00th=[ 52], 90.00th=[ 96], 95.00th=[ 142], | 99.00th=[ 253], 99.50th=[ 284], 99.90th=[ 284], 99.95th=[ 284], | 99.99th=[ 284] bw ( KiB/s): min= 30, max= 320, per=29.24%, avg=102.04, stdev=67.43, samples=115 iops : min= 1, max= 20, avg= 5.61, stdev= 4.30, samples=115 write: IOPS=5, BW=94.6KiB/s (96.9kB/s)(6256KiB/66142msec); 0 zone resets clat (msec): min=34, max=449, avg=128.66, stdev=68.43 lat (msec): min=34, max=449, avg=128.66, stdev=68.43 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 57], 10.00th=[ 65], 20.00th=[ 78], | 30.00th=[ 83], 40.00th=[ 96], 50.00th=[ 111], 60.00th=[ 124], | 70.00th=[ 144], 80.00th=[ 176], 90.00th=[ 215], 95.00th=[ 268], | 99.00th=[ 405], 99.50th=[ 443], 99.90th=[ 451], 99.95th=[ 451], | 99.99th=[ 451] bw ( KiB/s): min= 30, max= 223, per=26.20%, avg=96.40, stdev=49.50, samples=127 iops : min= 1, max= 13, avg= 5.25, stdev= 3.14, samples=127 lat (msec) : 10=1.69%, 20=17.06%, 50=21.74%, 100=25.13%, 250=30.86% lat (msec) : 500=3.52% cpu : usr=0.05%, sys=1.62%, ctx=1357, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=350KiB/s (358kB/s), 85.5KiB/s-95.7KiB/s (87.6kB/s-97.9kB/s), io=22.0MiB (24.1MB), run=63740-67158msec WRITE: bw=369KiB/s (378kB/s), 92.2KiB/s-97.4KiB/s (94.4kB/s-99.8kB/s), io=24.2MiB (25.4MB), run=63740-67158msec 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=146637: Sat Aug 22 07:26:47 2026 read: IOPS=1, BW=1806KiB/s (1849kB/s)(7168KiB/3970msec) clat (msec): min=95, max=526, avg=198.57, stdev=150.40 lat (msec): min=95, max=526, avg=198.57, stdev=150.40 clat percentiles (msec): | 1.00th=[ 95], 5.00th=[ 95], 10.00th=[ 95], 20.00th=[ 106], | 30.00th=[ 125], 40.00th=[ 125], 50.00th=[ 153], 60.00th=[ 171], | 70.00th=[ 171], 80.00th=[ 215], 90.00th=[ 527], 95.00th=[ 527], | 99.00th=[ 527], 99.50th=[ 527], 99.90th=[ 527], 99.95th=[ 527], | 99.99th=[ 527] bw ( KiB/s): min= 1988, max= 4063, per=93.07%, avg=2939.25, stdev=1079.32, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=1, BW=1290KiB/s (1321kB/s)(5120KiB/3970msec); 0 zone resets clat (msec): min=265, max=687, avg=473.70, stdev=153.62 lat (msec): min=266, max=687, avg=473.80, stdev=153.63 clat percentiles (msec): | 1.00th=[ 266], 5.00th=[ 266], 10.00th=[ 266], 20.00th=[ 266], | 30.00th=[ 430], 40.00th=[ 430], 50.00th=[ 456], 60.00th=[ 456], | 70.00th=[ 531], 80.00th=[ 531], 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= 1992, max= 2035, per=45.72%, avg=2021.25, stdev=19.77, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 100=8.33%, 250=41.67%, 500=25.00%, 750=25.00% cpu : usr=0.03%, sys=4.54%, ctx=83, 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=146638: Sat Aug 22 07:26:47 2026 read: IOPS=0, BW=316KiB/s (323kB/s)(2048KiB/6485msec) clat (msec): min=128, max=646, avg=387.21, stdev=366.02 lat (msec): min=128, max=646, avg=387.21, stdev=366.02 clat percentiles (msec): | 1.00th=[ 129], 5.00th=[ 129], 10.00th=[ 129], 20.00th=[ 129], | 30.00th=[ 129], 40.00th=[ 129], 50.00th=[ 129], 60.00th=[ 651], | 70.00th=[ 651], 80.00th=[ 651], 90.00th=[ 651], 95.00th=[ 651], | 99.00th=[ 651], 99.50th=[ 651], 99.90th=[ 651], 99.95th=[ 651], | 99.99th=[ 651] bw ( KiB/s): min= 1865, max= 2035, per=61.75%, avg=1950.00, stdev=120.21, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1579KiB/s (1617kB/s)(10.0MiB/6485msec); 0 zone resets clat (msec): min=189, max=2006, avg=559.79, stdev=542.16 lat (msec): min=190, max=2006, avg=560.12, stdev=542.05 clat percentiles (msec): | 1.00th=[ 190], 5.00th=[ 190], 10.00th=[ 190], 20.00th=[ 230], | 30.00th=[ 288], 40.00th=[ 330], 50.00th=[ 359], 60.00th=[ 393], | 70.00th=[ 443], 80.00th=[ 498], 90.00th=[ 869], 95.00th=[ 2005], | 99.00th=[ 2005], 99.50th=[ 2005], 99.90th=[ 2005], 99.95th=[ 2005], | 99.99th=[ 2005] bw ( KiB/s): min= 1865, max= 3976, per=51.61%, avg=2281.86, stdev=749.65, samples=7 iops : min= 1, max= 3, avg= 1.29, stdev= 0.76, samples=7 lat (msec) : 250=25.00%, 500=50.00%, 750=8.33%, 1000=8.33%, >=2000=8.33% cpu : usr=0.02%, sys=3.30%, ctx=152, 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=146639: Sat Aug 22 07:26:47 2026 read: IOPS=0, BW=974KiB/s (997kB/s)(6144KiB/6310msec) clat (msec): min=174, max=418, avg=284.23, stdev=104.68 lat (msec): min=174, max=418, avg=284.24, stdev=104.68 clat percentiles (msec): | 1.00th=[ 176], 5.00th=[ 176], 10.00th=[ 176], 20.00th=[ 197], | 30.00th=[ 197], 40.00th=[ 207], 50.00th=[ 207], 60.00th=[ 342], | 70.00th=[ 372], 80.00th=[ 372], 90.00th=[ 418], 95.00th=[ 418], | 99.00th=[ 418], 99.50th=[ 418], 99.90th=[ 418], 99.95th=[ 418], | 99.99th=[ 418] bw ( KiB/s): min= 1996, max= 3976, per=79.22%, avg=2501.75, stdev=983.04, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=974KiB/s (997kB/s)(6144KiB/6310msec); 0 zone resets clat (msec): min=251, max=2383, avg=731.42, stdev=817.32 lat (msec): min=251, max=2386, avg=731.99, stdev=818.46 clat percentiles (msec): | 1.00th=[ 253], 5.00th=[ 253], 10.00th=[ 253], 20.00th=[ 338], | 30.00th=[ 338], 40.00th=[ 368], 50.00th=[ 368], 60.00th=[ 468], | 70.00th=[ 584], 80.00th=[ 584], 90.00th=[ 2400], 95.00th=[ 2400], | 99.00th=[ 2400], 99.50th=[ 2400], 99.90th=[ 2400], 99.95th=[ 2400], | 99.99th=[ 2400] bw ( KiB/s): min= 1410, max= 4071, per=51.92%, avg=2295.20, stdev=1024.87, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 250=25.00%, 500=58.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=1.89%, ctx=60, 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=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=146640: Sat Aug 22 07:26:47 2026 read: IOPS=0, BW=860KiB/s (881kB/s)(5120KiB/5951msec) clat (msec): min=128, max=407, avg=219.67, stdev=112.96 lat (msec): min=128, max=407, avg=219.67, stdev=112.96 clat percentiles (msec): | 1.00th=[ 129], 5.00th=[ 129], 10.00th=[ 129], 20.00th=[ 129], | 30.00th=[ 134], 40.00th=[ 134], 50.00th=[ 209], 60.00th=[ 209], | 70.00th=[ 220], 80.00th=[ 220], 90.00th=[ 409], 95.00th=[ 409], | 99.00th=[ 409], 99.50th=[ 409], 99.90th=[ 409], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 2039, max= 5988, per=100.00%, avg=4013.50, stdev=2792.36, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1205KiB/s (1233kB/s)(7168KiB/5951msec); 0 zone resets clat (msec): min=255, max=2085, avg=667.82, stdev=684.26 lat (msec): min=255, max=2085, avg=668.12, stdev=684.38 clat percentiles (msec): | 1.00th=[ 255], 5.00th=[ 255], 10.00th=[ 255], 20.00th=[ 271], | 30.00th=[ 317], 40.00th=[ 317], 50.00th=[ 334], 60.00th=[ 363], | 70.00th=[ 363], 80.00th=[ 1053], 90.00th=[ 2089], 95.00th=[ 2089], | 99.00th=[ 2089], 99.50th=[ 2089], 99.90th=[ 2089], 99.95th=[ 2089], | 99.99th=[ 2089] bw ( KiB/s): min= 1428, max= 4079, per=61.49%, avg=2718.60, stdev=1260.65, samples=5 iops : min= 1, max= 3, avg= 1.80, stdev= 1.10, samples=5 lat (msec) : 250=33.33%, 500=50.00%, 2000=8.33%, >=2000=8.33% cpu : usr=0.05%, sys=2.08%, ctx=55, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3158KiB/s (3234kB/s), 316KiB/s-1806KiB/s (323kB/s-1849kB/s), io=20.0MiB (20.0MB), run=3970-6485msec WRITE: bw=4421KiB/s (4527kB/s), 974KiB/s-1579KiB/s (997kB/s-1617kB/s), io=28.0MiB (29.4MB), run=3970-6485msec rand-rw: (groupid=0, jobs=1): err= 0: pid=146642: Sat Aug 22 07:26:47 2026 read: IOPS=1, BW=1393KiB/s (1427kB/s)(7168KiB/5145msec) clat (usec): min=502, max=2923.1k, avg=569386.03, stdev=1054912.61 lat (usec): min=503, max=2923.1k, avg=569387.59, stdev=1054912.45 clat percentiles (usec): | 1.00th=[ 502], 5.00th=[ 502], 10.00th=[ 502], | 20.00th=[ 2868], 30.00th=[ 4817], 40.00th=[ 4817], | 50.00th=[ 246416], 60.00th=[ 316670], 70.00th=[ 316670], | 80.00th=[ 488637], 90.00th=[2936013], 95.00th=[2936013], | 99.00th=[2936013], 99.50th=[2936013], 99.90th=[2936013], | 99.95th=[2936013], 99.99th=[2936013] bw ( KiB/s): min= 1486, max= 4079, per=66.59%, avg=2330.80, stdev=1005.28, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 write: IOPS=0, BW=995KiB/s (1019kB/s)(5120KiB/5145msec); 0 zone resets clat (msec): min=128, max=399, avg=230.81, stdev=115.54 lat (msec): min=129, max=400, avg=231.32, stdev=115.10 clat percentiles (msec): | 1.00th=[ 129], 5.00th=[ 129], 10.00th=[ 129], 20.00th=[ 129], | 30.00th=[ 130], 40.00th=[ 130], 50.00th=[ 207], 60.00th=[ 207], | 70.00th=[ 292], 80.00th=[ 292], 90.00th=[ 401], 95.00th=[ 401], | 99.00th=[ 401], 99.50th=[ 401], 99.90th=[ 401], 99.95th=[ 401], | 99.99th=[ 401] bw ( KiB/s): min= 2015, max= 6119, per=82.98%, avg=4067.00, stdev=2901.97, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 lat (usec) : 750=8.33% lat (msec) : 4=8.33%, 10=8.33%, 250=33.33%, 500=33.33%, >=2000=8.33% cpu : usr=0.02%, sys=8.03%, ctx=217, 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=146643: Sat Aug 22 07:26:47 2026 read: IOPS=0, BW=350KiB/s (358kB/s)(2048KiB/5850msec) clat (usec): min=877, max=391912, avg=196394.81, stdev=276503.87 lat (usec): min=878, max=391914, avg=196396.52, stdev=276504.49 clat percentiles (usec): | 1.00th=[ 881], 5.00th=[ 881], 10.00th=[ 881], 20.00th=[ 881], | 30.00th=[ 881], 40.00th=[ 881], 50.00th=[ 881], 60.00th=[392168], | 70.00th=[392168], 80.00th=[392168], 90.00th=[392168], 95.00th=[392168], | 99.00th=[392168], 99.50th=[392168], 99.90th=[392168], 99.95th=[392168], | 99.99th=[392168] bw ( KiB/s): min= 1535, max= 2043, per=51.11%, avg=1789.00, stdev=359.21, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1750KiB/s (1792kB/s)(10.0MiB/5850msec); 0 zone resets clat (msec): min=163, max=2206, avg=545.48, stdev=624.98 lat (msec): min=163, max=2206, avg=545.58, stdev=624.98 clat percentiles (msec): | 1.00th=[ 165], 5.00th=[ 165], 10.00th=[ 165], 20.00th=[ 226], | 30.00th=[ 234], 40.00th=[ 236], 50.00th=[ 251], 60.00th=[ 264], | 70.00th=[ 439], 80.00th=[ 523], 90.00th=[ 919], 95.00th=[ 2198], | 99.00th=[ 2198], 99.50th=[ 2198], 99.90th=[ 2198], 99.95th=[ 2198], | 99.99th=[ 2198] bw ( KiB/s): min= 2039, max= 6011, per=73.54%, avg=3604.00, stdev=1654.59, samples=5 iops : min= 1, max= 5, avg= 2.80, stdev= 1.48, samples=5 lat (usec) : 1000=8.33% lat (msec) : 250=33.33%, 500=33.33%, 750=8.33%, 1000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=9.47%, ctx=154, 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=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=146644: Sat Aug 22 07:26:47 2026 read: IOPS=1, BW=1093KiB/s (1119kB/s)(6144KiB/5621msec) clat (usec): min=1682, max=639939, avg=145846.52, stdev=255291.29 lat (usec): min=1685, max=639941, avg=145848.46, stdev=255291.51 clat percentiles (usec): | 1.00th=[ 1680], 5.00th=[ 1680], 10.00th=[ 1680], 20.00th=[ 2769], | 30.00th=[ 2769], 40.00th=[ 8586], 50.00th=[ 8586], 60.00th=[ 13042], | 70.00th=[208667], 80.00th=[208667], 90.00th=[641729], 95.00th=[641729], | 99.00th=[641729], 99.50th=[641729], 99.90th=[641729], 99.95th=[641729], | 99.99th=[641729] bw ( KiB/s): min= 2035, max= 4087, per=96.47%, avg=3376.33, stdev=1162.32, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1093KiB/s (1119kB/s)(6144KiB/5621msec); 0 zone resets clat (msec): min=180, max=2122, avg=788.99, stdev=786.73 lat (msec): min=180, max=2122, avg=790.49, stdev=787.65 clat percentiles (msec): | 1.00th=[ 180], 5.00th=[ 180], 10.00th=[ 180], 20.00th=[ 215], | 30.00th=[ 215], 40.00th=[ 351], 50.00th=[ 351], 60.00th=[ 498], | 70.00th=[ 1368], 80.00th=[ 1368], 90.00th=[ 2123], 95.00th=[ 2123], | 99.00th=[ 2123], 99.50th=[ 2123], 99.90th=[ 2123], 99.95th=[ 2123], | 99.99th=[ 2123] bw ( KiB/s): min= 2003, max= 3034, per=46.52%, avg=2280.00, stdev=503.02, samples=4 iops : min= 1, max= 2, avg= 1.50, stdev= 0.58, samples=4 lat (msec) : 2=8.33%, 4=8.33%, 10=8.33%, 20=8.33%, 250=25.00% lat (msec) : 500=16.67%, 750=8.33%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=7.38%, ctx=118, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146645: Sat Aug 22 07:26:47 2026 read: IOPS=1, BW=1038KiB/s (1063kB/s)(5120KiB/4931msec) clat (usec): min=471, max=391344, avg=151321.99, stdev=206723.93 lat (usec): min=471, max=391346, avg=151323.57, stdev=206724.13 clat percentiles (usec): | 1.00th=[ 474], 5.00th=[ 474], 10.00th=[ 474], 20.00th=[ 474], | 30.00th=[ 515], 40.00th=[ 515], 50.00th=[ 578], 60.00th=[ 578], | 70.00th=[362808], 80.00th=[362808], 90.00th=[392168], 95.00th=[392168], | 99.00th=[392168], 99.50th=[392168], 99.90th=[392168], 99.95th=[392168], | 99.99th=[392168] bw ( KiB/s): min= 2043, max= 6011, per=100.00%, avg=4027.00, stdev=2805.80, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1454KiB/s (1489kB/s)(7168KiB/4931msec); 0 zone resets clat (msec): min=229, max=1542, avg=589.13, stdev=524.91 lat (msec): min=229, max=1542, avg=590.87, stdev=523.79 clat percentiles (msec): | 1.00th=[ 230], 5.00th=[ 230], 10.00th=[ 230], 20.00th=[ 236], | 30.00th=[ 284], 40.00th=[ 284], 50.00th=[ 330], 60.00th=[ 384], | 70.00th=[ 384], 80.00th=[ 1116], 90.00th=[ 1536], 95.00th=[ 1536], | 99.00th=[ 1536], 99.50th=[ 1536], 99.90th=[ 1536], 99.95th=[ 1536], | 99.99th=[ 1536] bw ( KiB/s): min= 1570, max= 4096, per=59.24%, avg=2903.50, stdev=1347.18, samples=4 iops : min= 1, max= 4, avg= 2.25, stdev= 1.50, samples=4 lat (usec) : 500=8.33%, 750=16.67% lat (msec) : 250=16.67%, 500=41.67%, 2000=16.67% cpu : usr=0.00%, sys=8.28%, ctx=169, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3501KiB/s (3585kB/s), 350KiB/s-1393KiB/s (358kB/s-1427kB/s), io=20.0MiB (20.0MB), run=4931-5850msec WRITE: bw=4901KiB/s (5019kB/s), 995KiB/s-1750KiB/s (1019kB/s-1792kB/s), io=28.0MiB (29.4MB), run=4931-5850msec 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=146652: Sat Aug 22 07:27:00 2026 read: IOPS=0, BW=3389KiB/s (3470kB/s)(12.0MiB/3626msec) clat (msec): min=356, max=1816, avg=1132.62, stdev=734.35 lat (msec): min=356, max=1816, avg=1132.62, stdev=734.35 clat percentiles (msec): | 1.00th=[ 359], 5.00th=[ 359], 10.00th=[ 359], 20.00th=[ 359], | 30.00th=[ 359], 40.00th=[ 1217], 50.00th=[ 1217], 60.00th=[ 1217], | 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) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.00%, ctx=51, 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=146653: Sat Aug 22 07:27:00 2026 read: IOPS=0, BW=990KiB/s (1014kB/s)(4096KiB/4138msec) clat (nsec): min=1423.7M, max=1423.7M, avg=1423723201.00, stdev= 0.00 lat (nsec): min=1423.7M, max=1423.7M, avg=1423724721.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1418], 5.00th=[ 1418], 10.00th=[ 1418], 20.00th=[ 1418], | 30.00th=[ 1418], 40.00th=[ 1418], 50.00th=[ 1418], 60.00th=[ 1418], | 70.00th=[ 1418], 80.00th=[ 1418], 90.00th=[ 1418], 95.00th=[ 1418], | 99.00th=[ 1418], 99.50th=[ 1418], 99.90th=[ 1418], 99.95th=[ 1418], | 99.99th=[ 1418] bw ( KiB/s): min= 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=1980KiB/s (2027kB/s)(8192KiB/4138msec); 0 zone resets clat (msec): min=721, max=1758, avg=1239.57, stdev=733.23 lat (msec): min=721, max=1758, avg=1240.16, stdev=733.33 clat percentiles (msec): | 1.00th=[ 718], 5.00th=[ 718], 10.00th=[ 718], 20.00th=[ 718], | 30.00th=[ 718], 40.00th=[ 718], 50.00th=[ 718], 60.00th=[ 1754], | 70.00th=[ 1754], 80.00th=[ 1754], 90.00th=[ 1754], 95.00th=[ 1754], | 99.00th=[ 1754], 99.50th=[ 1754], 99.90th=[ 1754], 99.95th=[ 1754], | 99.99th=[ 1754] bw ( KiB/s): min= 8047, max= 8047, per=100.00%, avg=8047.00, 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=0.00%, sys=6.48%, ctx=68, 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=146654: Sat Aug 22 07:27:00 2026 write: IOPS=1, BW=5705KiB/s (5842kB/s)(12.0MiB/2154msec); 0 zone resets clat (msec): min=350, max=865, avg=653.72, stdev=269.46 lat (msec): min=350, max=866, avg=654.97, stdev=269.80 clat percentiles (msec): | 1.00th=[ 351], 5.00th=[ 351], 10.00th=[ 351], 20.00th=[ 351], | 30.00th=[ 351], 40.00th=[ 743], 50.00th=[ 743], 60.00th=[ 743], | 70.00th=[ 869], 80.00th=[ 869], 90.00th=[ 869], 95.00th=[ 869], | 99.00th=[ 869], 99.50th=[ 869], 99.90th=[ 869], 99.95th=[ 869], | 99.99th=[ 869] bw ( KiB/s): min= 6815, max= 8159, per=94.56%, avg=7487.00, stdev=950.35, 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=0.23%, sys=10.03%, ctx=49, majf=0, minf=9 rand-rw: (groupid=0, jobs=1): err= 0: pid=146657: Sat Aug 22 07:27:00 2026 read: IOPS=1, BW=4604KiB/s (4714kB/s)(12.0MiB/2669msec) clat (msec): min=829, max=929, avg=889.41, stdev=52.71 lat (msec): min=829, max=929, avg=889.41, stdev=52.71 clat percentiles (msec): | 1.00th=[ 827], 5.00th=[ 827], 10.00th=[ 827], 20.00th=[ 827], | 30.00th=[ 827], 40.00th=[ 911], 50.00th=[ 911], 60.00th=[ 911], | 70.00th=[ 927], 80.00th=[ 927], 90.00th=[ 927], 95.00th=[ 927], | 99.00th=[ 927], 99.50th=[ 927], 99.90th=[ 927], 99.95th=[ 927], | 99.99th=[ 927] bw ( KiB/s): min= 8078, max= 8110, per=100.00%, avg=8094.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=100.00% cpu : usr=0.00%, sys=13.19%, ctx=256, 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=146658: Sat Aug 22 07:27:00 2026 read: IOPS=0, BW=1357KiB/s (1390kB/s)(4096KiB/3018msec) clat (nsec): min=817830k, max=817830k, avg=817829788.00, stdev= 0.00 lat (nsec): min=817832k, max=817832k, avg=817831708.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 818], 5.00th=[ 818], 10.00th=[ 818], 20.00th=[ 818], | 30.00th=[ 818], 40.00th=[ 818], 50.00th=[ 818], 60.00th=[ 818], | 70.00th=[ 818], 80.00th=[ 818], 90.00th=[ 818], 95.00th=[ 818], | 99.00th=[ 818], 99.50th=[ 818], 99.90th=[ 818], 99.95th=[ 818], | 99.99th=[ 818] bw ( KiB/s): min= 8110, max= 8110, per=100.00%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2714KiB/s (2780kB/s)(8192KiB/3018msec); 0 zone resets clat (msec): min=316, max=1881, avg=1098.70, stdev=1106.78 lat (msec): min=316, max=1882, avg=1099.70, stdev=1107.71 clat percentiles (msec): | 1.00th=[ 317], 5.00th=[ 317], 10.00th=[ 317], 20.00th=[ 317], | 30.00th=[ 317], 40.00th=[ 317], 50.00th=[ 317], 60.00th=[ 1888], | 70.00th=[ 1888], 80.00th=[ 1888], 90.00th=[ 1888], 95.00th=[ 1888], | 99.00th=[ 1888], 99.50th=[ 1888], 99.90th=[ 1888], 99.95th=[ 1888], | 99.99th=[ 1888] bw ( KiB/s): min= 8110, max= 8110, per=90.51%, avg=8110.00, 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=0.03%, sys=4.01%, ctx=87, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146659: Sat Aug 22 07:27:00 2026 write: IOPS=0, BW=3360KiB/s (3441kB/s)(12.0MiB/3657msec); 0 zone resets clat (msec): min=315, max=2511, avg=1218.28, stdev=1148.95 lat (msec): min=315, max=2512, avg=1218.68, stdev=1149.03 clat percentiles (msec): | 1.00th=[ 317], 5.00th=[ 317], 10.00th=[ 317], 20.00th=[ 317], | 30.00th=[ 317], 40.00th=[ 827], 50.00th=[ 827], 60.00th=[ 827], | 70.00th=[ 2500], 80.00th=[ 2500], 90.00th=[ 2500], 95.00th=[ 2500], | 99.00th=[ 2500], 99.50th=[ 2500], 99.90th=[ 2500], 99.95th=[ 2500], | 99.99th=[ 2500] bw ( KiB/s): min= 8175, max= 8175, per=91.24%, avg=8175.00, 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=4.90%, ctx=87, 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=146660: Sat Aug 22 07:27:00 2026 write: IOPS=1, BW=4153KiB/s (4252kB/s)(12.0MiB/2959msec); 0 zone resets clat (msec): min=504, max=1572, avg=985.50, stdev=541.81 lat (msec): min=504, max=1572, avg=986.05, stdev=541.57 clat percentiles (msec): | 1.00th=[ 506], 5.00th=[ 506], 10.00th=[ 506], 20.00th=[ 506], | 30.00th=[ 506], 40.00th=[ 877], 50.00th=[ 877], 60.00th=[ 877], | 70.00th=[ 1569], 80.00th=[ 1569], 90.00th=[ 1569], 95.00th=[ 1569], | 99.00th=[ 1569], 99.50th=[ 1569], 99.90th=[ 1569], 99.95th=[ 1569], | 99.99th=[ 1569] bw ( KiB/s): min= 8110, max= 8192, per=90.97%, avg=8151.00, stdev=57.98, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.03%, sys=6.22%, ctx=53, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=5429KiB/s (5559kB/s), 1357KiB/s-4604KiB/s (1390kB/s-4714kB/s), io=16.0MiB (16.8MB), run=2669-3018msec WRITE: bw=8960KiB/s (9175kB/s), 2714KiB/s-4153KiB/s (2780kB/s-4252kB/s), io=32.0MiB (33.6MB), run=2959-3657msec 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=146656: Sat Aug 22 07:27:00 2026 write: IOPS=1, BW=4900KiB/s (5017kB/s)(12.0MiB/2508msec); 0 zone resets clat (msec): min=327, max=1613, avg=783.43, stdev=720.28 lat (msec): min=328, max=1614, avg=783.80, stdev=720.29 clat percentiles (msec): | 1.00th=[ 330], 5.00th=[ 330], 10.00th=[ 330], 20.00th=[ 330], | 30.00th=[ 330], 40.00th=[ 409], 50.00th=[ 409], 60.00th=[ 409], | 70.00th=[ 1620], 80.00th=[ 1620], 90.00th=[ 1620], 95.00th=[ 1620], | 99.00th=[ 1620], 99.50th=[ 1620], 99.90th=[ 1620], 99.95th=[ 1620], | 99.99th=[ 1620] bw ( KiB/s): min= 7185, max= 8047, per=96.19%, avg=7616.00, stdev=609.53, 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=0.16%, sys=6.10%, ctx=58, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3959KiB/s (4054kB/s), 990KiB/s-3389KiB/s (1014kB/s-3470kB/s), io=16.0MiB (16.8MB), run=3626-4138msec WRITE: bw=7919KiB/s (8109kB/s), 1980KiB/s-5705KiB/s (2027kB/s-5842kB/s), io=32.0MiB (33.6MB), run=2154-4138msec