== sanity test 398b: DIO and buffer IO race ============== 14:14:19 (1785953659) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 8.90782 s, 5.7 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=178513: Wed Aug 5 14:18:21 2026 read: IOPS=7, BW=28.4KiB/s (29.0kB/s)(5992KiB/211249msec) clat (usec): min=42, max=1206.2k, avg=78479.55, stdev=63645.15 lat (usec): min=42, max=1206.2k, avg=78485.00, stdev=63643.82 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 15270], 10.00th=[ 26870], | 20.00th=[ 38011], 30.00th=[ 47973], 40.00th=[ 57410], | 50.00th=[ 66847], 60.00th=[ 78119], 70.00th=[ 90702], | 80.00th=[ 109577], 90.00th=[ 137364], 95.00th=[ 175113], | 99.00th=[ 287310], 99.50th=[ 320865], 99.90th=[ 734004], | 99.95th=[1199571], 99.99th=[1199571] bw ( KiB/s): min= 7, max= 86, per=25.11%, avg=28.37, stdev=13.93, samples=404 iops : min= 1, max= 21, avg= 6.42, stdev= 3.52, samples=404 write: IOPS=7, BW=29.8KiB/s (30.5kB/s)(6296KiB/211249msec); 0 zone resets clat (usec): min=992, max=558442, avg=59332.47, stdev=63014.10 lat (usec): min=993, max=558443, avg=59335.02, stdev=63013.70 clat percentiles (usec): | 1.00th=[ 1156], 5.00th=[ 1352], 10.00th=[ 1795], 20.00th=[ 7046], | 30.00th=[ 14746], 40.00th=[ 28705], 50.00th=[ 42730], 60.00th=[ 57934], | 70.00th=[ 76022], 80.00th=[ 99091], 90.00th=[137364], 95.00th=[179307], | 99.00th=[287310], 99.50th=[341836], 99.90th=[526386], 99.95th=[557843], | 99.99th=[557843] bw ( KiB/s): min= 7, max= 95, per=25.27%, avg=29.82, stdev=15.67, samples=404 iops : min= 1, max= 23, avg= 6.78, stdev= 3.96, samples=404 lat (usec) : 50=0.16%, 100=1.56%, 250=0.20%, 750=0.03%, 1000=0.03% lat (msec) : 2=5.44%, 4=1.86%, 10=5.76%, 20=5.18%, 50=24.02% lat (msec) : 100=33.56%, 250=20.64%, 500=1.40%, 750=0.13%, 2000=0.03% cpu : usr=0.04%, sys=2.96%, ctx=6303, majf=0, minf=19 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=178514: Wed Aug 5 14:18:21 2026 read: IOPS=7, BW=28.4KiB/s (29.1kB/s)(5940KiB/209198msec) clat (usec): min=40, max=1130.3k, avg=79296.88, stdev=65065.96 lat (usec): min=40, max=1130.3k, avg=79298.58, stdev=65066.09 clat percentiles (usec): | 1.00th=[ 58], 5.00th=[ 20579], 10.00th=[ 29230], | 20.00th=[ 39060], 30.00th=[ 46924], 40.00th=[ 56361], | 50.00th=[ 66323], 60.00th=[ 78119], 70.00th=[ 90702], | 80.00th=[ 106431], 90.00th=[ 141558], 95.00th=[ 179307], | 99.00th=[ 278922], 99.50th=[ 358613], 99.90th=[ 750781], | 99.95th=[1132463], 99.99th=[1132463] bw ( KiB/s): min= 7, max= 70, per=25.17%, avg=28.44, stdev=13.52, samples=400 iops : min= 1, max= 17, avg= 6.43, stdev= 3.42, samples=400 write: IOPS=7, BW=30.3KiB/s (31.1kB/s)(6348KiB/209198msec); 0 zone resets clat (usec): min=1042, max=474760, avg=57412.27, stdev=60287.19 lat (usec): min=1043, max=474762, avg=57416.84, stdev=60285.77 clat percentiles (usec): | 1.00th=[ 1188], 5.00th=[ 1369], 10.00th=[ 2409], 20.00th=[ 6980], | 30.00th=[ 13698], 40.00th=[ 26870], 50.00th=[ 40633], 60.00th=[ 54264], | 70.00th=[ 71828], 80.00th=[ 98042], 90.00th=[141558], 95.00th=[170918], | 99.00th=[250610], 99.50th=[346031], 99.90th=[446694], 99.95th=[476054], | 99.99th=[476054] bw ( KiB/s): min= 7, max= 87, per=26.11%, avg=30.81, stdev=16.79, samples=394 iops : min= 1, max= 21, avg= 7.04, stdev= 4.25, samples=394 lat (usec) : 50=0.13%, 100=1.17%, 250=0.10% lat (msec) : 2=4.95%, 4=1.82%, 10=6.54%, 20=6.15%, 50=24.77% lat (msec) : 100=32.81%, 250=20.28%, 500=1.14%, 750=0.07%, 1000=0.03% lat (msec) : 2000=0.03% cpu : usr=0.05%, sys=3.01%, ctx=6170, 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=178515: Wed Aug 5 14:18:21 2026 read: IOPS=7, BW=28.8KiB/s (29.4kB/s)(6028KiB/209661msec) clat (usec): min=34, max=661363, avg=75836.60, stdev=51450.36 lat (usec): min=35, max=661364, avg=75860.15, stdev=51446.42 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 12911], 10.00th=[ 26870], 20.00th=[ 38011], | 30.00th=[ 47973], 40.00th=[ 56886], 50.00th=[ 67634], 60.00th=[ 78119], | 70.00th=[ 90702], 80.00th=[105382], 90.00th=[132645], 95.00th=[162530], | 99.00th=[261096], 99.50th=[291505], 99.90th=[375391], 99.95th=[658506], | 99.99th=[658506] bw ( KiB/s): min= 7, max= 78, per=26.34%, avg=29.76, stdev=12.75, samples=389 iops : min= 1, max= 19, avg= 6.76, stdev= 3.22, samples=389 write: IOPS=7, BW=29.9KiB/s (30.6kB/s)(6260KiB/209661msec); 0 zone resets clat (usec): min=1000, max=1124.8k, avg=60747.17, stdev=70614.98 lat (usec): min=1001, max=1124.8k, avg=60761.88, stdev=70607.09 clat percentiles (usec): | 1.00th=[ 1172], 5.00th=[ 1385], 10.00th=[ 1876], | 20.00th=[ 6915], 30.00th=[ 13829], 40.00th=[ 28705], | 50.00th=[ 42730], 60.00th=[ 56886], 70.00th=[ 76022], | 80.00th=[ 103285], 90.00th=[ 143655], 95.00th=[ 181404], | 99.00th=[ 265290], 99.50th=[ 312476], 99.90th=[ 834667], | 99.95th=[1132463], 99.99th=[1132463] bw ( KiB/s): min= 4, max= 95, per=25.78%, avg=30.42, stdev=15.28, samples=395 iops : min= 1, max= 23, avg= 6.93, stdev= 3.87, samples=395 lat (usec) : 50=0.39%, 100=1.63%, 250=0.10%, 500=0.10%, 1000=0.03% lat (msec) : 2=5.21%, 4=1.82%, 10=6.05%, 20=5.73%, 50=23.40% lat (msec) : 100=33.30%, 250=20.93%, 500=1.14%, 750=0.10%, 1000=0.03% lat (msec) : 2000=0.03% cpu : usr=0.04%, sys=2.95%, ctx=6309, 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=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=178516: Wed Aug 5 14:18:21 2026 read: IOPS=7, BW=28.5KiB/s (29.2kB/s)(6052KiB/212133msec) clat (usec): min=44, max=1019.6k, avg=78218.40, stdev=57746.96 lat (usec): min=44, max=1019.6k, avg=78219.87, stdev=57746.90 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 13566], 10.00th=[ 26346], | 20.00th=[ 37487], 30.00th=[ 47449], 40.00th=[ 57934], | 50.00th=[ 68682], 60.00th=[ 80217], 70.00th=[ 92799], | 80.00th=[ 109577], 90.00th=[ 139461], 95.00th=[ 170918], | 99.00th=[ 270533], 99.50th=[ 295699], 99.90th=[ 608175], | 99.95th=[1019216], 99.99th=[1019216] bw ( KiB/s): min= 7, max= 71, per=25.62%, avg=28.95, stdev=12.96, samples=401 iops : min= 1, max= 17, avg= 6.57, stdev= 3.28, samples=401 write: IOPS=7, BW=29.4KiB/s (30.1kB/s)(6236KiB/212133msec); 0 zone resets clat (usec): min=1044, max=1164.0k, avg=59989.63, stdev=73599.53 lat (usec): min=1044, max=1164.0k, avg=59995.03, stdev=73597.61 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1385], 10.00th=[ 2245], | 20.00th=[ 6980], 30.00th=[ 13435], 40.00th=[ 26608], | 50.00th=[ 40109], 60.00th=[ 53740], 70.00th=[ 72877], | 80.00th=[ 100140], 90.00th=[ 141558], 95.00th=[ 175113], | 99.00th=[ 316670], 99.50th=[ 379585], 99.90th=[1010828], | 99.95th=[1166017], 99.99th=[1166017] bw ( KiB/s): min= 7, max= 88, per=25.41%, avg=29.98, stdev=16.32, samples=399 iops : min= 1, max= 22, avg= 6.83, stdev= 4.14, samples=399 lat (usec) : 50=0.26%, 100=1.79% lat (msec) : 2=4.85%, 4=1.95%, 10=6.28%, 20=5.92%, 50=23.89% lat (msec) : 100=32.03%, 250=21.45%, 500=1.40%, 750=0.07%, 2000=0.10% cpu : usr=0.05%, sys=2.80%, ctx=6254, majf=0, minf=19 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=113KiB/s (116kB/s), 28.4KiB/s-28.8KiB/s (29.0kB/s-29.4kB/s), io=23.4MiB (24.6MB), run=209198-212133msec WRITE: bw=119KiB/s (121kB/s), 29.4KiB/s-30.3KiB/s (30.1kB/s-31.1kB/s), io=24.6MiB (25.7MB), run=209198-212133msec rand-rw: (groupid=0, jobs=1): err= 0: pid=178508: Wed Aug 5 14:19:08 2026 read: IOPS=5, BW=23.3KiB/s (23.8kB/s)(5992KiB/257666msec) clat (msec): min=5, max=1290, avg=70.37, stdev=81.28 lat (msec): min=5, max=1290, avg=70.38, stdev=81.28 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 15], 10.00th=[ 18], 20.00th=[ 24], | 30.00th=[ 29], 40.00th=[ 36], 50.00th=[ 45], 60.00th=[ 56], | 70.00th=[ 72], 80.00th=[ 101], 90.00th=[ 157], 95.00th=[ 211], | 99.00th=[ 355], 99.50th=[ 518], 99.90th=[ 877], 99.95th=[ 1284], | 99.99th=[ 1284] bw ( KiB/s): min= 4, max= 111, per=27.63%, avg=25.42, stdev=19.40, samples=451 iops : min= 1, max= 27, avg= 5.66, stdev= 4.90, samples=451 write: IOPS=6, BW=24.4KiB/s (25.0kB/s)(6296KiB/257666msec); 0 zone resets clat (msec): min=8, max=1012, avg=96.39, stdev=78.86 lat (msec): min=8, max=1012, avg=96.40, stdev=78.86 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 25], 10.00th=[ 30], 20.00th=[ 39], | 30.00th=[ 46], 40.00th=[ 56], 50.00th=[ 69], 60.00th=[ 87], | 70.00th=[ 117], 80.00th=[ 148], 90.00th=[ 201], 95.00th=[ 243], | 99.00th=[ 363], 99.50th=[ 388], 99.90th=[ 693], 99.95th=[ 1011], | 99.99th=[ 1011] bw ( KiB/s): min= 7, max= 96, per=26.28%, avg=25.23, stdev=19.05, samples=477 iops : min= 1, max= 24, avg= 5.61, stdev= 4.82, samples=477 lat (msec) : 10=1.01%, 20=6.64%, 50=37.34%, 100=27.51%, 250=23.60% lat (msec) : 500=3.58%, 750=0.23%, 1000=0.03%, 2000=0.07% cpu : usr=0.03%, sys=1.25%, ctx=4732, 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=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=178509: Wed Aug 5 14:19:08 2026 read: IOPS=5, BW=22.9KiB/s (23.5kB/s)(5940KiB/259222msec) clat (msec): min=4, max=1199, avg=72.18, stdev=81.54 lat (msec): min=4, max=1199, avg=72.19, stdev=81.54 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 14], 10.00th=[ 17], 20.00th=[ 23], | 30.00th=[ 28], 40.00th=[ 34], 50.00th=[ 42], 60.00th=[ 54], | 70.00th=[ 74], 80.00th=[ 109], 90.00th=[ 169], 95.00th=[ 224], | 99.00th=[ 347], 99.50th=[ 456], 99.90th=[ 852], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 4, max= 107, per=26.94%, avg=24.78, stdev=19.79, samples=458 iops : min= 1, max= 26, avg= 5.50, stdev= 4.98, samples=458 write: IOPS=6, BW=24.5KiB/s (25.1kB/s)(6348KiB/259222msec); 0 zone resets clat (msec): min=9, max=878, avg=95.47, stdev=80.24 lat (msec): min=9, max=878, avg=95.47, stdev=80.24 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 25], 10.00th=[ 30], 20.00th=[ 37], | 30.00th=[ 46], 40.00th=[ 55], 50.00th=[ 67], 60.00th=[ 87], | 70.00th=[ 114], 80.00th=[ 146], 90.00th=[ 194], 95.00th=[ 245], | 99.00th=[ 376], 99.50th=[ 464], 99.90th=[ 735], 99.95th=[ 877], | 99.99th=[ 877] bw ( KiB/s): min= 6, max= 111, per=26.42%, avg=25.36, stdev=19.20, samples=477 iops : min= 1, max= 27, avg= 5.64, stdev= 4.85, samples=477 lat (msec) : 10=0.65%, 20=7.52%, 50=38.12%, 100=25.29%, 250=24.32% lat (msec) : 500=3.74%, 750=0.26%, 1000=0.07%, 2000=0.03% cpu : usr=0.04%, sys=1.17%, ctx=4745, 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=178510: Wed Aug 5 14:19:08 2026 read: IOPS=5, BW=23.2KiB/s (23.7kB/s)(6028KiB/259988msec) clat (msec): min=5, max=885, avg=70.72, stdev=71.83 lat (msec): min=5, max=885, avg=70.72, stdev=71.85 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 14], 10.00th=[ 17], 20.00th=[ 24], | 30.00th=[ 30], 40.00th=[ 36], 50.00th=[ 45], 60.00th=[ 56], | 70.00th=[ 73], 80.00th=[ 107], 90.00th=[ 169], 95.00th=[ 218], | 99.00th=[ 334], 99.50th=[ 401], 99.90th=[ 510], 99.95th=[ 885], | 99.99th=[ 885] bw ( KiB/s): min= 7, max= 111, per=27.17%, avg=24.99, stdev=19.69, samples=462 iops : min= 1, max= 27, avg= 5.55, stdev= 4.97, samples=462 write: IOPS=6, BW=24.1KiB/s (24.7kB/s)(6260KiB/259988msec); 0 zone resets clat (msec): min=8, max=1229, avg=97.69, stdev=89.92 lat (msec): min=8, max=1229, avg=97.69, stdev=89.92 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 24], 10.00th=[ 29], 20.00th=[ 36], | 30.00th=[ 45], 40.00th=[ 53], 50.00th=[ 66], 60.00th=[ 86], | 70.00th=[ 116], 80.00th=[ 153], 90.00th=[ 203], 95.00th=[ 245], | 99.00th=[ 418], 99.50th=[ 527], 99.90th=[ 911], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 4, max= 120, per=26.09%, avg=25.05, stdev=19.54, samples=478 iops : min= 1, max= 30, avg= 5.57, stdev= 4.94, samples=478 lat (msec) : 10=1.01%, 20=7.29%, 50=37.86%, 100=25.42%, 250=24.61% lat (msec) : 500=3.48%, 750=0.20%, 1000=0.10%, 2000=0.03% cpu : usr=0.04%, sys=1.23%, ctx=4697, 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=178511: Wed Aug 5 14:19:08 2026 read: IOPS=5, BW=23.4KiB/s (23.0kB/s)(6052KiB/258523msec) clat (msec): min=7, max=1014, avg=69.49, stdev=72.52 lat (msec): min=7, max=1014, avg=69.49, stdev=72.52 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 14], 10.00th=[ 18], 20.00th=[ 24], | 30.00th=[ 29], 40.00th=[ 36], 50.00th=[ 44], 60.00th=[ 56], | 70.00th=[ 74], 80.00th=[ 103], 90.00th=[ 155], 95.00th=[ 211], | 99.00th=[ 321], 99.50th=[ 409], 99.90th=[ 701], 99.95th=[ 1011], | 99.99th=[ 1011] bw ( KiB/s): min= 4, max= 111, per=28.32%, avg=26.05, stdev=20.06, samples=446 iops : min= 1, max= 27, avg= 5.81, stdev= 5.06, samples=446 write: IOPS=6, BW=24.1KiB/s (24.7kB/s)(6236KiB/258523msec); 0 zone resets clat (msec): min=9, max=1235, avg=98.05, stdev=90.23 lat (msec): min=9, max=1235, avg=98.05, stdev=90.23 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 26], 10.00th=[ 31], 20.00th=[ 37], | 30.00th=[ 45], 40.00th=[ 54], 50.00th=[ 66], 60.00th=[ 87], | 70.00th=[ 113], 80.00th=[ 146], 90.00th=[ 201], 95.00th=[ 262], | 99.00th=[ 409], 99.50th=[ 514], 99.90th=[ 927], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 7, max= 96, per=26.18%, avg=25.13, stdev=19.17, samples=475 iops : min= 1, max= 24, avg= 5.59, stdev= 4.85, samples=475 lat (msec) : 10=0.81%, 20=6.67%, 50=39.39%, 100=25.16%, 250=23.80% lat (msec) : 500=3.74%, 750=0.33%, 1000=0.03%, 2000=0.07% cpu : usr=0.04%, sys=1.17%, ctx=4732, 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=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=92.4KiB/s (94.6kB/s), 22.9KiB/s-23.4KiB/s (23.5kB/s-23.0kB/s), io=23.4MiB (24.6MB), run=257666-259988msec WRITE: bw=96.7KiB/s (99.0kB/s), 24.1KiB/s-24.5KiB/s (24.7kB/s-25.1kB/s), io=24.6MiB (25.7MB), run=257666-259988msec 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=178581: Wed Aug 5 14:20:14 2026 read: IOPS=7, BW=115KiB/s (117kB/s)(5920KiB/51603msec) clat (usec): min=34, max=409767, avg=75004.75, stdev=50002.28 lat (usec): min=34, max=409769, avg=75019.78, stdev=49991.06 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 70], 10.00th=[ 27395], 20.00th=[ 41157], | 30.00th=[ 49546], 40.00th=[ 55837], 50.00th=[ 67634], 60.00th=[ 78119], | 70.00th=[ 89654], 80.00th=[105382], 90.00th=[131597], 95.00th=[156238], | 99.00th=[254804], 99.50th=[329253], 99.90th=[408945], 99.95th=[408945], | 99.99th=[408945] bw ( KiB/s): min= 30, max= 249, per=24.64%, avg=114.33, stdev=48.54, samples=101 iops : min= 1, max= 15, avg= 6.33, stdev= 3.06, samples=101 write: IOPS=7, BW=123KiB/s (126kB/s)(6368KiB/51603msec); 0 zone resets clat (usec): min=1630, max=260599, avg=59673.27, stdev=53066.42 lat (usec): min=1632, max=260602, avg=59680.19, stdev=53070.28 clat percentiles (usec): | 1.00th=[ 1762], 5.00th=[ 2180], 10.00th=[ 5669], 20.00th=[ 11863], | 30.00th=[ 22938], 40.00th=[ 34341], 50.00th=[ 46400], 60.00th=[ 60031], | 70.00th=[ 74974], 80.00th=[ 99091], 90.00th=[132645], 95.00th=[173016], | 99.00th=[221250], 99.50th=[233833], 99.90th=[261096], 99.95th=[261096], | 99.99th=[261096] bw ( KiB/s): min= 30, max= 315, per=25.92%, avg=126.50, stdev=60.45, samples=98 iops : min= 1, max= 19, avg= 7.10, stdev= 3.81, samples=98 lat (usec) : 50=0.26%, 100=2.99%, 250=0.13% lat (msec) : 2=1.95%, 4=2.21%, 10=4.69%, 20=5.86%, 50=24.74% lat (msec) : 100=35.81%, 250=20.70%, 500=0.65% cpu : usr=0.06%, sys=3.57%, ctx=1687, 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=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=178582: Wed Aug 5 14:20:14 2026 read: IOPS=6, BW=112KiB/s (114kB/s)(5744KiB/51463msec) clat (usec): min=47, max=314847, avg=77934.32, stdev=48952.12 lat (usec): min=47, max=314849, avg=77966.01, stdev=48968.34 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 15533], 10.00th=[ 28967], 20.00th=[ 42206], | 30.00th=[ 50594], 40.00th=[ 57934], 50.00th=[ 69731], 60.00th=[ 81265], | 70.00th=[ 92799], 80.00th=[107480], 90.00th=[135267], 95.00th=[158335], | 99.00th=[265290], 99.50th=[308282], 99.90th=[316670], 99.95th=[316670], | 99.99th=[316670] bw ( KiB/s): min= 30, max= 253, per=24.00%, avg=111.35, stdev=49.09, samples=101 iops : min= 1, max= 15, avg= 6.13, stdev= 3.10, samples=101 write: IOPS=7, BW=127KiB/s (130kB/s)(6544KiB/51463msec); 0 zone resets clat (usec): min=1563, max=297800, avg=57270.93, stdev=53832.55 lat (usec): min=1566, max=297802, avg=57289.86, stdev=53831.16 clat percentiles (usec): | 1.00th=[ 1762], 5.00th=[ 2278], 10.00th=[ 6915], 20.00th=[ 12387], | 30.00th=[ 20317], 40.00th=[ 30802], 50.00th=[ 41157], 60.00th=[ 52691], | 70.00th=[ 69731], 80.00th=[ 99091], 90.00th=[133694], 95.00th=[175113], | 99.00th=[233833], 99.50th=[263193], 99.90th=[299893], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 30, max= 346, per=26.43%, avg=128.96, stdev=62.46, samples=99 iops : min= 1, max= 21, avg= 7.25, stdev= 3.99, samples=99 lat (usec) : 50=0.13%, 100=1.95% lat (msec) : 2=2.21%, 4=1.17%, 10=5.47%, 20=6.90%, 50=26.43% lat (msec) : 100=34.51%, 250=20.05%, 500=1.17% cpu : usr=0.06%, sys=3.69%, ctx=1759, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=178583: Wed Aug 5 14:20:14 2026 read: IOPS=7, BW=126KiB/s (129kB/s)(6256KiB/49784msec) clat (usec): min=39, max=269525, avg=69500.46, stdev=42900.75 lat (usec): min=39, max=269526, avg=69501.93, stdev=42900.83 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 70], 10.00th=[ 24511], 20.00th=[ 35914], | 30.00th=[ 44827], 40.00th=[ 53216], 50.00th=[ 63177], 60.00th=[ 73925], | 70.00th=[ 87557], 80.00th=[104334], 90.00th=[124257], 95.00th=[143655], | 99.00th=[198181], 99.50th=[250610], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 30, max= 286, per=27.49%, avg=127.56, stdev=51.73, samples=96 iops : min= 1, max= 17, avg= 7.17, stdev= 3.29, samples=96 write: IOPS=7, BW=121KiB/s (124kB/s)(6032KiB/49784msec); 0 zone resets clat (usec): min=1551, max=261655, avg=59855.05, stdev=56147.22 lat (usec): min=1553, max=261658, avg=59860.96, stdev=56146.09 clat percentiles (usec): | 1.00th=[ 1614], 5.00th=[ 2147], 10.00th=[ 5276], 20.00th=[ 9503], | 30.00th=[ 17171], 40.00th=[ 30540], 50.00th=[ 44303], 60.00th=[ 59507], | 70.00th=[ 78119], 80.00th=[102237], 90.00th=[135267], 95.00th=[177210], | 99.00th=[250610], 99.50th=[252707], 99.90th=[261096], 99.95th=[261096], | 99.99th=[261096] bw ( KiB/s): min= 31, max= 349, per=24.77%, avg=120.87, stdev=58.30, samples=96 iops : min= 1, max= 21, avg= 6.75, stdev= 3.70, samples=96 lat (usec) : 50=0.26%, 100=3.65%, 250=0.26% lat (msec) : 2=1.95%, 4=1.56%, 10=6.90%, 20=6.25%, 50=23.31% lat (msec) : 100=33.85%, 250=21.35%, 500=0.65% cpu : usr=0.03%, sys=3.39%, ctx=1667, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=178584: Wed Aug 5 14:20:14 2026 read: IOPS=7, BW=127KiB/s (130kB/s)(6032KiB/47439msec) clat (usec): min=43, max=288599, avg=68994.96, stdev=46017.02 lat (usec): min=44, max=288601, avg=68999.90, stdev=46017.66 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 67], 10.00th=[ 775], 20.00th=[ 38011], | 30.00th=[ 46924], 40.00th=[ 53740], 50.00th=[ 62653], 60.00th=[ 71828], | 70.00th=[ 81265], 80.00th=[ 96994], 90.00th=[126354], 95.00th=[154141], | 99.00th=[252707], 99.50th=[270533], 99.90th=[287310], 99.95th=[287310], | 99.99th=[287310] bw ( KiB/s): min= 30, max= 285, per=27.54%, avg=127.79, stdev=51.70, samples=92 iops : min= 1, max= 17, avg= 7.17, stdev= 3.25, samples=92 write: IOPS=8, BW=132KiB/s (135kB/s)(6256KiB/47439msec); 0 zone resets clat (usec): min=1679, max=289753, avg=54655.14, stdev=52116.88 lat (usec): min=1680, max=289754, avg=54670.20, stdev=52111.75 clat percentiles (usec): | 1.00th=[ 1729], 5.00th=[ 2040], 10.00th=[ 4948], 20.00th=[ 8979], | 30.00th=[ 15926], 40.00th=[ 27919], 50.00th=[ 37487], 60.00th=[ 51643], | 70.00th=[ 70779], 80.00th=[ 99091], 90.00th=[132645], 95.00th=[160433], | 99.00th=[219153], 99.50th=[229639], 99.90th=[291505], 99.95th=[291505], | 99.99th=[291505] bw ( KiB/s): min= 31, max= 317, per=28.23%, avg=137.78, stdev=63.51, samples=89 iops : min= 1, max= 19, avg= 7.83, stdev= 4.03, samples=89 lat (usec) : 50=0.13%, 100=4.56%, 250=0.13%, 1000=0.13% lat (msec) : 2=2.47%, 4=1.69%, 10=6.77%, 20=6.90%, 50=24.48% lat (msec) : 100=33.85%, 250=18.23%, 500=0.65% cpu : usr=0.04%, sys=3.58%, ctx=1639, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=464KiB/s (475kB/s), 112KiB/s-127KiB/s (114kB/s-130kB/s), io=23.4MiB (24.5MB), run=47439-51603msec WRITE: bw=488KiB/s (500kB/s), 121KiB/s-132KiB/s (124kB/s-135kB/s), io=24.6MiB (25.8MB), run=47439-51603msec rand-rw: (groupid=0, jobs=1): err= 0: pid=178576: Wed Aug 5 14:20:36 2026 read: IOPS=4, BW=79.5KiB/s (81.4kB/s)(5920KiB/74440msec) clat (msec): min=8, max=517, avg=79.07, stdev=63.81 lat (msec): min=8, max=517, avg=79.08, stdev=63.81 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 20], 10.00th=[ 26], 20.00th=[ 35], | 30.00th=[ 43], 40.00th=[ 52], 50.00th=[ 61], 60.00th=[ 70], | 70.00th=[ 81], 80.00th=[ 112], 90.00th=[ 165], 95.00th=[ 222], | 99.00th=[ 300], 99.50th=[ 351], 99.90th=[ 518], 99.95th=[ 518], | 99.99th=[ 518] bw ( KiB/s): min= 29, max= 222, per=25.87%, avg=82.79, stdev=46.94, samples=137 iops : min= 1, max= 13, avg= 4.31, stdev= 2.98, samples=137 write: IOPS=5, BW=85.5KiB/s (87.6kB/s)(6368KiB/74440msec); 0 zone resets clat (msec): min=19, max=440, avg=112.90, stdev=72.39 lat (msec): min=19, max=440, avg=112.91, stdev=72.39 clat percentiles (msec): | 1.00th=[ 24], 5.00th=[ 39], 10.00th=[ 45], 20.00th=[ 59], | 30.00th=[ 69], 40.00th=[ 79], 50.00th=[ 89], 60.00th=[ 106], | 70.00th=[ 128], 80.00th=[ 159], 90.00th=[ 218], 95.00th=[ 262], | 99.00th=[ 338], 99.50th=[ 435], 99.90th=[ 443], 99.95th=[ 443], | 99.99th=[ 443] bw ( KiB/s): min= 29, max= 223, per=26.32%, avg=88.42, stdev=41.69, samples=139 iops : min= 1, max= 13, avg= 4.68, stdev= 2.65, samples=139 lat (msec) : 10=0.39%, 20=2.34%, 50=22.79%, 100=41.67%, 250=28.52% lat (msec) : 500=4.17%, 750=0.13% cpu : usr=0.03%, sys=1.35%, ctx=1245, 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=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=178577: Wed Aug 5 14:20:36 2026 read: IOPS=4, BW=76.8KiB/s (78.7kB/s)(5744KiB/74769msec) clat (msec): min=13, max=521, avg=84.22, stdev=67.51 lat (msec): min=13, max=521, avg=84.22, stdev=67.51 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 24], 10.00th=[ 28], 20.00th=[ 38], | 30.00th=[ 46], 40.00th=[ 53], 50.00th=[ 63], 60.00th=[ 73], | 70.00th=[ 90], 80.00th=[ 116], 90.00th=[ 182], 95.00th=[ 232], | 99.00th=[ 321], 99.50th=[ 355], 99.90th=[ 523], 99.95th=[ 523], | 99.99th=[ 523] bw ( KiB/s): min= 29, max= 233, per=26.42%, avg=84.55, stdev=46.02, samples=131 iops : min= 1, max= 14, avg= 4.44, stdev= 2.91, samples=131 write: IOPS=5, BW=87.5KiB/s (89.6kB/s)(6544KiB/74769msec); 0 zone resets clat (msec): min=20, max=431, avg=108.73, stdev=66.49 lat (msec): min=20, max=431, avg=108.73, stdev=66.49 clat percentiles (msec): | 1.00th=[ 27], 5.00th=[ 37], 10.00th=[ 47], 20.00th=[ 56], | 30.00th=[ 65], 40.00th=[ 74], 50.00th=[ 90], 60.00th=[ 107], | 70.00th=[ 127], 80.00th=[ 157], 90.00th=[ 205], 95.00th=[ 245], | 99.00th=[ 330], 99.50th=[ 376], 99.90th=[ 430], 99.95th=[ 430], | 99.99th=[ 430] bw ( KiB/s): min= 29, max= 222, per=26.60%, avg=89.37, stdev=49.77, samples=141 iops : min= 1, max= 13, avg= 4.74, stdev= 3.18, samples=141 lat (msec) : 20=1.56%, 50=22.40%, 100=41.41%, 250=30.60%, 500=3.91% lat (msec) : 750=0.13% cpu : usr=0.03%, sys=1.28%, ctx=1193, 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=178578: Wed Aug 5 14:20:36 2026 read: IOPS=5, BW=86.0KiB/s (88.1kB/s)(6256KiB/72744msec) clat (msec): min=15, max=322, avg=81.59, stdev=59.02 lat (msec): min=15, max=322, avg=81.59, stdev=59.02 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 25], 10.00th=[ 31], 20.00th=[ 39], | 30.00th=[ 45], 40.00th=[ 52], 50.00th=[ 63], 60.00th=[ 73], | 70.00th=[ 91], 80.00th=[ 117], 90.00th=[ 163], 95.00th=[ 222], | 99.00th=[ 305], 99.50th=[ 317], 99.90th=[ 321], 99.95th=[ 321], | 99.99th=[ 321] bw ( KiB/s): min= 29, max= 223, per=27.76%, avg=88.83, stdev=47.95, samples=137 iops : min= 1, max= 13, avg= 4.69, stdev= 3.05, samples=137 write: IOPS=5, BW=82.9KiB/s (84.9kB/s)(6032KiB/72744msec); 0 zone resets clat (msec): min=24, max=350, avg=107.65, stdev=61.01 lat (msec): min=24, max=350, avg=107.66, stdev=61.02 clat percentiles (msec): | 1.00th=[ 27], 5.00th=[ 42], 10.00th=[ 47], 20.00th=[ 57], | 30.00th=[ 65], 40.00th=[ 78], 50.00th=[ 93], 60.00th=[ 112], | 70.00th=[ 125], 80.00th=[ 155], 90.00th=[ 199], 95.00th=[ 230], | 99.00th=[ 321], 99.50th=[ 347], 99.90th=[ 351], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 30, max= 210, per=25.20%, avg=84.66, stdev=39.90, samples=137 iops : min= 1, max= 13, avg= 4.44, stdev= 2.55, samples=137 lat (msec) : 20=1.17%, 50=24.35%, 100=38.80%, 250=33.33%, 500=2.34% cpu : usr=0.02%, sys=1.23%, ctx=1170, 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=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=178579: Wed Aug 5 14:20:36 2026 read: IOPS=5, BW=80.6KiB/s (82.5kB/s)(6032KiB/74838msec) clat (msec): min=9, max=467, avg=79.16, stdev=64.02 lat (msec): min=9, max=467, avg=79.17, stdev=64.02 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 24], 10.00th=[ 29], 20.00th=[ 36], | 30.00th=[ 44], 40.00th=[ 51], 50.00th=[ 60], 60.00th=[ 70], | 70.00th=[ 85], 80.00th=[ 106], 90.00th=[ 159], 95.00th=[ 207], | 99.00th=[ 342], 99.50th=[ 451], 99.90th=[ 468], 99.95th=[ 468], | 99.99th=[ 468] bw ( KiB/s): min= 29, max= 223, per=26.44%, avg=84.62, stdev=50.65, samples=136 iops : min= 1, max= 13, avg= 4.43, stdev= 3.22, samples=136 write: IOPS=5, BW=83.6KiB/s (85.6kB/s)(6256KiB/74838msec); 0 zone resets clat (msec): min=18, max=442, avg=114.58, stdev=70.09 lat (msec): min=18, max=442, avg=114.58, stdev=70.09 clat percentiles (msec): | 1.00th=[ 28], 5.00th=[ 38], 10.00th=[ 48], 20.00th=[ 59], | 30.00th=[ 73], 40.00th=[ 82], 50.00th=[ 95], 60.00th=[ 113], | 70.00th=[ 129], 80.00th=[ 163], 90.00th=[ 213], 95.00th=[ 251], | 99.00th=[ 363], 99.50th=[ 435], 99.90th=[ 443], 99.95th=[ 443], | 99.99th=[ 443] bw ( KiB/s): min= 29, max= 192, per=25.23%, avg=84.77, stdev=39.78, samples=142 iops : min= 1, max= 12, avg= 4.44, stdev= 2.55, samples=142 lat (msec) : 10=0.13%, 20=1.43%, 50=24.61%, 100=38.67%, 250=31.64% lat (msec) : 500=3.52% cpu : usr=0.04%, sys=1.27%, ctx=1207, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=320KiB/s (328kB/s), 76.8KiB/s-86.0KiB/s (78.7kB/s-88.1kB/s), io=23.4MiB (24.5MB), run=72744-74838msec WRITE: bw=337KiB/s (345kB/s), 82.9KiB/s-87.5KiB/s (84.9kB/s-89.6kB/s), io=24.6MiB (25.8MB), run=72744-74838msec 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=178602: Wed Aug 5 14:21:01 2026 read: IOPS=0, BW=812KiB/s (832kB/s)(7168KiB/8825msec) clat (msec): min=213, max=759, avg=388.53, stdev=205.28 lat (msec): min=213, max=759, avg=388.54, stdev=205.28 clat percentiles (msec): | 1.00th=[ 213], 5.00th=[ 213], 10.00th=[ 213], 20.00th=[ 218], | 30.00th=[ 239], 40.00th=[ 239], 50.00th=[ 309], 60.00th=[ 447], | 70.00th=[ 447], 80.00th=[ 542], 90.00th=[ 760], 95.00th=[ 760], | 99.00th=[ 760], 99.50th=[ 760], 99.90th=[ 760], 99.95th=[ 760], | 99.99th=[ 760] bw ( KiB/s): min= 1961, max= 6131, per=100.00%, avg=3024.00, stdev=2071.60, samples=4 iops : min= 1, max= 5, avg= 2.00, stdev= 2.00, samples=4 write: IOPS=0, BW=580KiB/s (594kB/s)(5120KiB/8825msec); 0 zone resets clat (msec): min=219, max=3928, avg=1131.72, stdev=1570.09 lat (msec): min=219, max=3928, avg=1131.79, stdev=1570.08 clat percentiles (msec): | 1.00th=[ 220], 5.00th=[ 220], 10.00th=[ 220], 20.00th=[ 220], | 30.00th=[ 426], 40.00th=[ 426], 50.00th=[ 456], 60.00th=[ 456], | 70.00th=[ 634], 80.00th=[ 634], 90.00th=[ 3943], 95.00th=[ 3943], | 99.00th=[ 3943], 99.50th=[ 3943], 99.90th=[ 3943], 99.95th=[ 3943], | 99.99th=[ 3943] bw ( KiB/s): min= 1928, max= 3849, per=81.26%, avg=2450.00, stdev=933.77, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 250=33.33%, 500=33.33%, 750=16.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=6.71%, ctx=327, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178603: Wed Aug 5 14:21:01 2026 read: IOPS=0, BW=215KiB/s (221kB/s)(2048KiB/9508msec) clat (usec): min=562, max=3850.3k, avg=1925424.43, stdev=2722165.22 lat (usec): min=564, max=3850.3k, avg=1925426.20, stdev=2722165.70 clat percentiles (usec): | 1.00th=[ 562], 5.00th=[ 562], 10.00th=[ 562], | 20.00th=[ 562], 30.00th=[ 562], 40.00th=[ 562], | 50.00th=[ 562], 60.00th=[3841983], 70.00th=[3841983], | 80.00th=[3841983], 90.00th=[3841983], 95.00th=[3841983], | 99.00th=[3841983], 99.50th=[3841983], 99.90th=[3841983], | 99.95th=[3841983], 99.99th=[3841983] bw ( KiB/s): min= 1984, max= 2027, per=93.15%, avg=2005.50, stdev=30.41, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1077KiB/s (1103kB/s)(10.0MiB/9508msec); 0 zone resets clat (msec): min=240, max=1159, avg=558.26, stdev=290.81 lat (msec): min=240, max=1159, avg=558.96, stdev=290.34 clat percentiles (msec): | 1.00th=[ 241], 5.00th=[ 241], 10.00th=[ 241], 20.00th=[ 321], | 30.00th=[ 338], 40.00th=[ 359], 50.00th=[ 388], 60.00th=[ 575], | 70.00th=[ 617], 80.00th=[ 718], 90.00th=[ 869], 95.00th=[ 1167], | 99.00th=[ 1167], 99.50th=[ 1167], 99.90th=[ 1167], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 1924, max= 3968, per=84.12%, avg=2536.29, stdev=963.61, samples=7 iops : min= 1, max= 3, avg= 1.57, stdev= 0.98, samples=7 lat (usec) : 750=8.33% lat (msec) : 250=8.33%, 500=33.33%, 750=25.00%, 1000=8.33%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=7.16%, ctx=463, 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=178604: Wed Aug 5 14:21:01 2026 read: IOPS=0, BW=691KiB/s (707kB/s)(6144KiB/8897msec) clat (usec): min=811, max=405415, avg=194825.14, stdev=189291.86 lat (usec): min=813, max=405416, avg=194826.77, stdev=189291.45 clat percentiles (usec): | 1.00th=[ 816], 5.00th=[ 816], 10.00th=[ 816], 20.00th=[ 2835], | 30.00th=[ 2835], 40.00th=[ 73925], 50.00th=[ 73925], 60.00th=[312476], | 70.00th=[371196], 80.00th=[371196], 90.00th=[404751], 95.00th=[404751], | 99.00th=[404751], 99.50th=[404751], 99.90th=[404751], 99.95th=[404751], | 99.99th=[404751] bw ( KiB/s): min= 2035, max= 3968, per=100.00%, avg=3313.67, stdev=1107.46, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=0, BW=691KiB/s (707kB/s)(6144KiB/8897msec); 0 zone resets clat (msec): min=354, max=3956, avg=1210.46, stdev=1356.90 lat (msec): min=354, max=3957, avg=1210.90, stdev=1357.30 clat percentiles (msec): | 1.00th=[ 355], 5.00th=[ 355], 10.00th=[ 355], 20.00th=[ 667], | 30.00th=[ 667], 40.00th=[ 667], 50.00th=[ 667], 60.00th=[ 718], | 70.00th=[ 902], 80.00th=[ 902], 90.00th=[ 3943], 95.00th=[ 3943], | 99.00th=[ 3943], 99.50th=[ 3943], 99.90th=[ 3943], 99.95th=[ 3943], | 99.99th=[ 3943] bw ( KiB/s): min= 1965, max= 2039, per=66.48%, avg=2004.50, stdev=35.47, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (usec) : 1000=8.33% lat (msec) : 4=8.33%, 100=8.33%, 500=33.33%, 750=25.00%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.01%, sys=4.37%, ctx=158, 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=178605: Wed Aug 5 14:21:01 2026 read: IOPS=0, BW=613KiB/s (627kB/s)(5120KiB/8357msec) clat (usec): min=643, max=651649, avg=231577.30, stdev=318715.67 lat (usec): min=644, max=651651, avg=231578.54, stdev=318715.79 clat percentiles (usec): | 1.00th=[ 644], 5.00th=[ 644], 10.00th=[ 644], 20.00th=[ 644], | 30.00th=[ 2540], 40.00th=[ 2540], 50.00th=[ 3261], 60.00th=[ 3261], | 70.00th=[501220], 80.00th=[501220], 90.00th=[650118], 95.00th=[650118], | 99.00th=[650118], 99.50th=[650118], 99.90th=[650118], 99.95th=[650118], | 99.99th=[650118] bw ( KiB/s): min= 1924, max= 5953, per=100.00%, avg=3938.50, stdev=2848.93, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=0, BW=858KiB/s (878kB/s)(7168KiB/8357msec); 0 zone resets clat (msec): min=224, max=3992, avg=978.35, stdev=1360.84 lat (msec): min=224, max=3992, avg=978.43, stdev=1360.84 clat percentiles (msec): | 1.00th=[ 226], 5.00th=[ 226], 10.00th=[ 226], 20.00th=[ 275], | 30.00th=[ 321], 40.00th=[ 321], 50.00th=[ 372], 60.00th=[ 592], | 70.00th=[ 592], 80.00th=[ 1083], 90.00th=[ 3977], 95.00th=[ 3977], | 99.00th=[ 3977], 99.50th=[ 3977], 99.90th=[ 3977], 99.95th=[ 3977], | 99.99th=[ 3977] bw ( KiB/s): min= 3856, max= 3938, per=100.00%, avg=3908.00, stdev=45.21, samples=3 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=3 lat (usec) : 750=8.33% lat (msec) : 4=16.67%, 250=8.33%, 500=33.33%, 750=16.67%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=4.94%, ctx=152, 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=2154KiB/s (2206kB/s), 215KiB/s-812KiB/s (221kB/s-832kB/s), io=20.0MiB (20.0MB), run=8357-9508msec WRITE: bw=3016KiB/s (3088kB/s), 580KiB/s-1077KiB/s (594kB/s-1103kB/s), io=28.0MiB (29.4MB), run=8357-9508msec rand-rw: (groupid=0, jobs=1): err= 0: pid=178606: Wed Aug 5 14:21:03 2026 read: IOPS=0, BW=838KiB/s (858kB/s)(7168KiB/8556msec) clat (msec): min=194, max=718, avg=378.67, stdev=216.37 lat (msec): min=194, max=718, avg=378.67, stdev=216.37 clat percentiles (msec): | 1.00th=[ 194], 5.00th=[ 194], 10.00th=[ 194], 20.00th=[ 230], | 30.00th=[ 243], 40.00th=[ 243], 50.00th=[ 243], 60.00th=[ 380], | 70.00th=[ 380], 80.00th=[ 651], 90.00th=[ 718], 95.00th=[ 718], | 99.00th=[ 718], 99.50th=[ 718], 99.90th=[ 718], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 2027, max= 3835, per=100.00%, avg=2734.75, stdev=873.21, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=598KiB/s (613kB/s)(5120KiB/8556msec); 0 zone resets clat (msec): min=379, max=3370, avg=1162.05, stdev=1259.84 lat (msec): min=379, max=3370, avg=1166.87, stdev=1257.16 clat percentiles (msec): | 1.00th=[ 380], 5.00th=[ 380], 10.00th=[ 380], 20.00th=[ 380], | 30.00th=[ 447], 40.00th=[ 447], 50.00th=[ 584], 60.00th=[ 584], | 70.00th=[ 1028], 80.00th=[ 1028], 90.00th=[ 3373], 95.00th=[ 3373], | 99.00th=[ 3373], 99.50th=[ 3373], 99.90th=[ 3373], 99.95th=[ 3373], | 99.99th=[ 3373] bw ( KiB/s): min= 1793, max= 2003, per=73.73%, avg=1939.20, stdev=83.59, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 250=33.33%, 500=25.00%, 750=25.00%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.31%, ctx=102, 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=178607: Wed Aug 5 14:21:03 2026 read: IOPS=0, BW=196KiB/s (200kB/s)(2048KiB/10467msec) clat (msec): min=794, max=3618, avg=2206.95, stdev=1996.87 lat (msec): min=794, max=3618, avg=2206.95, stdev=1996.87 clat percentiles (msec): | 1.00th=[ 793], 5.00th=[ 793], 10.00th=[ 793], 20.00th=[ 793], | 30.00th=[ 793], 40.00th=[ 793], 50.00th=[ 793], 60.00th=[ 3608], | 70.00th=[ 3608], 80.00th=[ 3608], 90.00th=[ 3608], 95.00th=[ 3608], | 99.00th=[ 3608], 99.50th=[ 3608], 99.90th=[ 3608], 99.95th=[ 3608], | 99.99th=[ 3608] bw ( KiB/s): min= 1973, max= 2031, per=100.00%, avg=2002.00, stdev=41.01, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=0, BW=978KiB/s (1002kB/s)(10.0MiB/10467msec); 0 zone resets clat (msec): min=130, max=1241, avg=567.19, stdev=395.29 lat (msec): min=130, max=1241, avg=568.16, stdev=395.54 clat percentiles (msec): | 1.00th=[ 131], 5.00th=[ 131], 10.00th=[ 131], 20.00th=[ 203], | 30.00th=[ 230], 40.00th=[ 384], 50.00th=[ 401], 60.00th=[ 464], | 70.00th=[ 659], 80.00th=[ 760], 90.00th=[ 1200], 95.00th=[ 1234], | 99.00th=[ 1234], 99.50th=[ 1234], 99.90th=[ 1234], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 1793, max= 4039, per=84.50%, avg=2222.38, stdev=739.05, samples=8 iops : min= 1, max= 3, avg= 1.25, stdev= 0.71, samples=8 lat (msec) : 250=25.00%, 500=25.00%, 750=8.33%, 1000=16.67%, 2000=16.67% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=1.89%, ctx=100, 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=178608: Wed Aug 5 14:21:03 2026 read: IOPS=0, BW=599KiB/s (613kB/s)(6144KiB/10259msec) clat (msec): min=131, max=1134, avg=490.83, stdev=375.40 lat (msec): min=131, max=1134, avg=490.83, stdev=375.40 clat percentiles (msec): | 1.00th=[ 132], 5.00th=[ 132], 10.00th=[ 132], 20.00th=[ 169], | 30.00th=[ 169], 40.00th=[ 313], 50.00th=[ 313], 60.00th=[ 558], | 70.00th=[ 642], 80.00th=[ 642], 90.00th=[ 1133], 95.00th=[ 1133], | 99.00th=[ 1133], 99.50th=[ 1133], 99.90th=[ 1133], 99.95th=[ 1133], | 99.99th=[ 1133] bw ( KiB/s): min= 1954, max= 4071, per=100.00%, avg=2521.75, stdev=1033.49, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=599KiB/s (613kB/s)(6144KiB/10259msec); 0 zone resets clat (msec): min=447, max=3850, avg=1184.08, stdev=1323.25 lat (msec): min=447, max=3850, avg=1184.17, stdev=1323.25 clat percentiles (msec): | 1.00th=[ 447], 5.00th=[ 447], 10.00th=[ 447], 20.00th=[ 535], | 30.00th=[ 535], 40.00th=[ 584], 50.00th=[ 584], 60.00th=[ 634], | 70.00th=[ 1053], 80.00th=[ 1053], 90.00th=[ 3842], 95.00th=[ 3842], | 99.00th=[ 3842], 99.50th=[ 3842], 99.90th=[ 3842], 99.95th=[ 3842], | 99.99th=[ 3842] bw ( KiB/s): min= 1878, max= 2031, per=74.54%, avg=1960.40, stdev=62.51, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 250=16.67%, 500=16.67%, 750=41.67%, 2000=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=2.21%, ctx=103, 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=178609: Wed Aug 5 14:21:03 2026 read: IOPS=0, BW=470KiB/s (481kB/s)(5120KiB/10900msec) clat (msec): min=105, max=1010, avg=489.39, stdev=472.97 lat (msec): min=105, max=1010, avg=489.39, stdev=472.97 clat percentiles (msec): | 1.00th=[ 106], 5.00th=[ 106], 10.00th=[ 106], 20.00th=[ 106], | 30.00th=[ 148], 40.00th=[ 148], 50.00th=[ 180], 60.00th=[ 180], | 70.00th=[ 1003], 80.00th=[ 1003], 90.00th=[ 1011], 95.00th=[ 1011], | 99.00th=[ 1011], 99.50th=[ 1011], 99.90th=[ 1011], 99.95th=[ 1011], | 99.99th=[ 1011] bw ( KiB/s): min= 2019, max= 4063, per=100.00%, avg=2705.67, stdev=1175.51, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=0, BW=658KiB/s (673kB/s)(7168KiB/10900msec); 0 zone resets clat (msec): min=89, max=4380, avg=1148.40, stdev=1522.92 lat (msec): min=89, max=4380, avg=1149.10, stdev=1522.72 clat percentiles (msec): | 1.00th=[ 90], 5.00th=[ 90], 10.00th=[ 90], 20.00th=[ 186], | 30.00th=[ 292], 40.00th=[ 292], 50.00th=[ 558], 60.00th=[ 869], | 70.00th=[ 869], 80.00th=[ 1670], 90.00th=[ 4396], 95.00th=[ 4396], | 99.00th=[ 4396], 99.50th=[ 4396], 99.90th=[ 4396], 99.95th=[ 4396], | 99.99th=[ 4396] bw ( KiB/s): min= 1878, max= 2023, per=74.70%, avg=1964.50, stdev=64.54, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 100=8.33%, 250=33.33%, 500=8.33%, 750=8.33%, 1000=8.33% lat (msec) : 2000=25.00%, >=2000=8.33% cpu : usr=0.00%, sys=2.06%, ctx=113, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=1879KiB/s (1924kB/s), 196KiB/s-838KiB/s (200kB/s-858kB/s), io=20.0MiB (20.0MB), run=8556-10900msec WRITE: bw=2630KiB/s (2694kB/s), 598KiB/s-978KiB/s (613kB/s-1002kB/s), io=28.0MiB (29.4MB), run=8556-10900msec 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=178618: Wed Aug 5 14:21:21 2026 read: IOPS=0, BW=3137KiB/s (3212kB/s)(12.0MiB/3917msec) clat (msec): min=1199, max=1343, avg=1267.94, stdev=72.39 lat (msec): min=1199, max=1343, avg=1267.94, stdev=72.39 clat percentiles (msec): | 1.00th=[ 1200], 5.00th=[ 1200], 10.00th=[ 1200], 20.00th=[ 1200], | 30.00th=[ 1200], 40.00th=[ 1267], 50.00th=[ 1267], 60.00th=[ 1267], | 70.00th=[ 1351], 80.00th=[ 1351], 90.00th=[ 1351], 95.00th=[ 1351], | 99.00th=[ 1351], 99.50th=[ 1351], 99.90th=[ 1351], 99.95th=[ 1351], | 99.99th=[ 1351] bw ( KiB/s): min= 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) : 2000=100.00% cpu : usr=0.03%, sys=9.09%, ctx=377, 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=178619: Wed Aug 5 14:21:21 2026 read: IOPS=0, BW=999KiB/s (1023kB/s)(4096KiB/4099msec) clat (nsec): min=1862.8M, max=1862.8M, avg=1862817481.00, stdev= 0.00 lat (nsec): min=1862.8M, max=1862.8M, avg=1862819366.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1871], 5.00th=[ 1871], 10.00th=[ 1871], 20.00th=[ 1871], | 30.00th=[ 1871], 40.00th=[ 1871], 50.00th=[ 1871], 60.00th=[ 1871], | 70.00th=[ 1871], 80.00th=[ 1871], 90.00th=[ 1871], 95.00th=[ 1871], | 99.00th=[ 1871], 99.50th=[ 1871], 99.90th=[ 1871], 99.95th=[ 1871], | 99.99th=[ 1871] bw ( KiB/s): min= 8031, max= 8031, per=100.00%, avg=8031.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1999KiB/s (2047kB/s)(8192KiB/4099msec); 0 zone resets clat (msec): min=668, max=1399, avg=1033.95, stdev=516.70 lat (msec): min=668, max=1399, avg=1034.33, stdev=516.74 clat percentiles (msec): | 1.00th=[ 667], 5.00th=[ 667], 10.00th=[ 667], 20.00th=[ 667], | 30.00th=[ 667], 40.00th=[ 667], 50.00th=[ 667], 60.00th=[ 1401], | 70.00th=[ 1401], 80.00th=[ 1401], 90.00th=[ 1401], 95.00th=[ 1401], | 99.00th=[ 1401], 99.50th=[ 1401], 99.90th=[ 1401], 99.95th=[ 1401], | 99.99th=[ 1401] bw ( KiB/s): min= 7353, max= 7353, per=97.82%, avg=7353.00, 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=0.02%, sys=5.10%, ctx=121, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178620: Wed Aug 5 14:21:21 2026 write: IOPS=0, BW=2819KiB/s (2887kB/s)(12.0MiB/4359msec); 0 zone resets clat (msec): min=757, max=1874, avg=1421.51, stdev=587.70 lat (msec): min=757, max=1874, avg=1421.86, stdev=587.54 clat percentiles (msec): | 1.00th=[ 760], 5.00th=[ 760], 10.00th=[ 760], 20.00th=[ 760], | 30.00th=[ 760], 40.00th=[ 1636], 50.00th=[ 1636], 60.00th=[ 1636], | 70.00th=[ 1871], 80.00th=[ 1871], 90.00th=[ 1871], 95.00th=[ 1871], | 99.00th=[ 1871], 99.50th=[ 1871], 99.90th=[ 1871], 99.95th=[ 1871], | 99.99th=[ 1871] bw ( KiB/s): min= 8031, max= 8126, per=100.00%, avg=8078.50, stdev=67.18, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.61%, ctx=108, 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=178621: Wed Aug 5 14:21:21 2026 write: IOPS=0, BW=3596KiB/s (3682kB/s)(12.0MiB/3417msec); 0 zone resets clat (msec): min=894, max=1597, avg=1138.25, stdev=398.24 lat (msec): min=894, max=1598, avg=1138.54, stdev=398.29 clat percentiles (msec): | 1.00th=[ 894], 5.00th=[ 894], 10.00th=[ 894], 20.00th=[ 894], | 30.00th=[ 894], 40.00th=[ 919], 50.00th=[ 919], 60.00th=[ 919], | 70.00th=[ 1603], 80.00th=[ 1603], 90.00th=[ 1603], 95.00th=[ 1603], | 99.00th=[ 1603], 99.50th=[ 1603], 99.90th=[ 1603], 99.95th=[ 1603], | 99.99th=[ 1603] bw ( KiB/s): min= 7699, max= 7922, per=100.00%, avg=7810.50, stdev=157.68, 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=2.02%, 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 Run status group 0 (all jobs): READ: bw=3997KiB/s (4093kB/s), 999KiB/s-3137KiB/s (1023kB/s-3212kB/s), io=16.0MiB (16.8MB), run=3917-4099msec WRITE: bw=7517KiB/s (7698kB/s), 1999KiB/s-3596KiB/s (2047kB/s-3682kB/s), io=32.0MiB (33.6MB), run=3417-4359msec rand-rw: (groupid=0, jobs=1): err= 0: pid=178623: Wed Aug 5 14:21:22 2026 read: IOPS=0, BW=3615KiB/s (3702kB/s)(12.0MiB/3399msec) clat (msec): min=744, max=1618, avg=1131.58, stdev=445.13 lat (msec): min=744, max=1618, avg=1131.58, stdev=445.13 clat percentiles (msec): | 1.00th=[ 743], 5.00th=[ 743], 10.00th=[ 743], 20.00th=[ 743], | 30.00th=[ 743], 40.00th=[ 1028], 50.00th=[ 1028], 60.00th=[ 1028], | 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= 7907, max= 8143, per=100.00%, avg=8025.00, stdev=166.88, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.80%, ctx=37, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178624: Wed Aug 5 14:21:22 2026 read: IOPS=0, BW=983KiB/s (1006kB/s)(4096KiB/4168msec) clat (nsec): min=2368.1M, max=2368.1M, avg=2368104387.00, stdev= 0.00 lat (nsec): min=2368.1M, max=2368.1M, avg=2368106747.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 2366], 5.00th=[ 2366], 10.00th=[ 2366], 20.00th=[ 2366], | 30.00th=[ 2366], 40.00th=[ 2366], 50.00th=[ 2366], 60.00th=[ 2366], | 70.00th=[ 2366], 80.00th=[ 2366], 90.00th=[ 2366], 95.00th=[ 2366], | 99.00th=[ 2366], 99.50th=[ 2366], 99.90th=[ 2366], 99.95th=[ 2366], | 99.99th=[ 2366] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1965KiB/s (2013kB/s)(8192KiB/4168msec); 0 zone resets clat (msec): min=291, max=1484, avg=887.73, stdev=843.85 lat (msec): min=298, max=1486, avg=892.75, stdev=840.31 clat percentiles (msec): | 1.00th=[ 292], 5.00th=[ 292], 10.00th=[ 292], 20.00th=[ 292], | 30.00th=[ 292], 40.00th=[ 292], 50.00th=[ 292], 60.00th=[ 1485], | 70.00th=[ 1485], 80.00th=[ 1485], 90.00th=[ 1485], 95.00th=[ 1485], | 99.00th=[ 1485], 99.50th=[ 1485], 99.90th=[ 1485], 99.95th=[ 1485], | 99.99th=[ 1485] lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=3.34%, ctx=83, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178625: Wed Aug 5 14:21:22 2026 write: IOPS=0, BW=2785KiB/s (2852kB/s)(12.0MiB/4412msec); 0 zone resets clat (msec): min=677, max=2101, avg=1468.11, stdev=724.91 lat (msec): min=677, max=2103, avg=1469.06, stdev=725.87 clat percentiles (msec): | 1.00th=[ 676], 5.00th=[ 676], 10.00th=[ 676], 20.00th=[ 676], | 30.00th=[ 676], 40.00th=[ 1620], 50.00th=[ 1620], 60.00th=[ 1620], | 70.00th=[ 2106], 80.00th=[ 2106], 90.00th=[ 2106], 95.00th=[ 2106], | 99.00th=[ 2106], 99.50th=[ 2106], 99.90th=[ 2106], 99.95th=[ 2106], | 99.99th=[ 2106] bw ( KiB/s): min= 8015, max= 8175, per=100.00%, avg=8095.00, stdev=113.14, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.81%, ctx=59, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178626: Wed Aug 5 14:21:22 2026 write: IOPS=0, BW=3576KiB/s (3662kB/s)(12.0MiB/3436msec); 0 zone resets clat (msec): min=955, max=1437, avg=1141.38, stdev=259.22 lat (msec): min=956, max=1442, avg=1143.23, stdev=261.51 clat percentiles (msec): | 1.00th=[ 953], 5.00th=[ 953], 10.00th=[ 953], 20.00th=[ 953], | 30.00th=[ 953], 40.00th=[ 1028], 50.00th=[ 1028], 60.00th=[ 1028], | 70.00th=[ 1435], 80.00th=[ 1435], 90.00th=[ 1435], 95.00th=[ 1435], | 99.00th=[ 1435], 99.50th=[ 1435], 99.90th=[ 1435], 99.95th=[ 1435], | 99.99th=[ 1435] bw ( KiB/s): min= 7757, max= 8175, per=100.00%, avg=7966.00, stdev=295.57, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.47%, ctx=49, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3931KiB/s (4025kB/s), 983KiB/s-3615KiB/s (1006kB/s-3702kB/s), io=16.0MiB (16.8MB), run=3399-4168msec WRITE: bw=7427KiB/s (7605kB/s), 1965KiB/s-3576KiB/s (2013kB/s-3662kB/s), io=32.0MiB (33.6MB), run=3436-4412msec