== sanity test 398b: DIO and buffer IO race ============== 19:59:17 (1786406357) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 7.45424 s, 6.8 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=143556: Mon Aug 10 20:03:26 2026 read: IOPS=6, BW=27.4KiB/s (28.1kB/s)(5992KiB/218394msec) clat (usec): min=31, max=1341.9k, avg=71745.68, stdev=59859.47 lat (usec): min=31, max=1341.9k, avg=71756.21, stdev=59860.58 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 59], 10.00th=[ 76], | 20.00th=[ 34341], 30.00th=[ 43779], 40.00th=[ 52691], | 50.00th=[ 62129], 60.00th=[ 74974], 70.00th=[ 89654], | 80.00th=[ 108528], 90.00th=[ 137364], 95.00th=[ 154141], | 99.00th=[ 240124], 99.50th=[ 291505], 99.90th=[ 404751], | 99.95th=[1333789], 99.99th=[1333789] bw ( KiB/s): min= 7, max= 86, per=26.06%, avg=27.88, stdev=14.21, samples=414 iops : min= 1, max= 21, avg= 6.31, stdev= 3.58, samples=414 write: IOPS=7, BW=28.8KiB/s (29.5kB/s)(6296KiB/218394msec); 0 zone resets clat (usec): min=1161, max=650075, avg=70223.45, stdev=72103.35 lat (usec): min=1163, max=650077, avg=70228.14, stdev=72104.75 clat percentiles (usec): | 1.00th=[ 1336], 5.00th=[ 2573], 10.00th=[ 4883], 20.00th=[ 8848], | 30.00th=[ 15401], 40.00th=[ 30278], 50.00th=[ 52167], 60.00th=[ 70779], | 70.00th=[ 91751], 80.00th=[120062], 90.00th=[166724], 95.00th=[202376], | 99.00th=[308282], 99.50th=[371196], 99.90th=[574620], 99.95th=[650118], | 99.99th=[650118] bw ( KiB/s): min= 7, max= 95, per=25.97%, avg=29.08, stdev=14.58, samples=417 iops : min= 1, max= 23, avg= 6.62, stdev= 3.68, samples=417 lat (usec) : 50=0.68%, 100=4.72%, 250=0.10%, 500=0.03%, 750=0.03% lat (usec) : 1000=0.03% lat (msec) : 2=1.95%, 4=2.60%, 10=7.23%, 20=6.18%, 50=19.17% lat (msec) : 100=32.00%, 250=23.73%, 500=1.43%, 750=0.07%, 2000=0.03% cpu : usr=0.04%, sys=2.97%, ctx=6545, 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=143557: Mon Aug 10 20:03:26 2026 read: IOPS=6, BW=26.9KiB/s (27.5kB/s)(5940KiB/221171msec) clat (usec): min=29, max=654335, avg=72612.71, stdev=55494.99 lat (usec): min=29, max=654337, avg=72626.97, stdev=55514.64 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 60], 10.00th=[ 95], 20.00th=[ 34341], | 30.00th=[ 44827], 40.00th=[ 53216], 50.00th=[ 63177], 60.00th=[ 73925], | 70.00th=[ 89654], 80.00th=[109577], 90.00th=[137364], 95.00th=[168821], | 99.00th=[223347], 99.50th=[274727], 99.90th=[513803], 99.95th=[658506], | 99.99th=[658506] bw ( KiB/s): min= 6, max= 79, per=25.31%, avg=27.08, stdev=13.46, samples=421 iops : min= 1, max= 19, avg= 6.12, stdev= 3.40, samples=421 write: IOPS=7, BW=28.7KiB/s (29.4kB/s)(6348KiB/221171msec); 0 zone resets clat (usec): min=1187, max=974216, avg=71239.93, stdev=72856.50 lat (usec): min=1188, max=974220, avg=71257.49, stdev=72853.60 clat percentiles (usec): | 1.00th=[ 1303], 5.00th=[ 2008], 10.00th=[ 4146], 20.00th=[ 8225], | 30.00th=[ 15139], 40.00th=[ 30278], 50.00th=[ 53740], 60.00th=[ 72877], | 70.00th=[ 95945], 80.00th=[125305], 90.00th=[166724], 95.00th=[202376], | 99.00th=[295699], 99.50th=[341836], 99.90th=[455082], 99.95th=[977273], | 99.99th=[977273] bw ( KiB/s): min= 7, max= 87, per=25.78%, avg=28.88, stdev=13.95, samples=423 iops : min= 1, max= 21, avg= 6.57, stdev= 3.52, samples=423 lat (usec) : 50=0.46%, 100=4.43%, 250=0.20%, 500=0.20%, 750=0.10% lat (usec) : 1000=0.16% lat (msec) : 2=2.83%, 4=2.47%, 10=7.19%, 20=5.86%, 50=18.52% lat (msec) : 100=30.96%, 250=25.29%, 500=1.20%, 750=0.10%, 1000=0.03% cpu : usr=0.05%, sys=2.93%, ctx=6476, 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=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=143558: Mon Aug 10 20:03:26 2026 read: IOPS=6, BW=26.9KiB/s (27.5kB/s)(6028KiB/224223msec) clat (usec): min=29, max=445345, avg=69795.71, stdev=50875.62 lat (usec): min=29, max=445347, avg=69828.58, stdev=50896.66 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 59], 10.00th=[ 77], 20.00th=[ 31851], | 30.00th=[ 43254], 40.00th=[ 52167], 50.00th=[ 61080], 60.00th=[ 71828], | 70.00th=[ 87557], 80.00th=[107480], 90.00th=[135267], 95.00th=[162530], | 99.00th=[210764], 99.50th=[240124], 99.90th=[383779], 99.95th=[446694], | 99.99th=[446694] bw ( KiB/s): min= 7, max= 85, per=25.49%, avg=27.28, stdev=14.46, samples=424 iops : min= 1, max= 21, avg= 6.16, stdev= 3.64, samples=424 write: IOPS=6, BW=27.9KiB/s (28.6kB/s)(6260KiB/224223msec); 0 zone resets clat (usec): min=1110, max=1148.6k, avg=75884.12, stdev=78550.97 lat (usec): min=1111, max=1148.6k, avg=75888.77, stdev=78550.93 clat percentiles (usec): | 1.00th=[ 1352], 5.00th=[ 2769], 10.00th=[ 4817], | 20.00th=[ 9634], 30.00th=[ 16909], 40.00th=[ 36439], | 50.00th=[ 60031], 60.00th=[ 77071], 70.00th=[ 100140], | 80.00th=[ 128451], 90.00th=[ 177210], 95.00th=[ 219153], | 99.00th=[ 320865], 99.50th=[ 350225], 99.90th=[ 658506], | 99.95th=[1149240], 99.99th=[1149240] bw ( KiB/s): min= 7, max= 102, per=25.12%, avg=28.14, stdev=14.00, samples=427 iops : min= 1, max= 25, avg= 6.38, stdev= 3.54, samples=427 lat (usec) : 50=0.59%, 100=4.95%, 250=0.20%, 500=0.13%, 750=0.07% lat (usec) : 1000=0.07% lat (msec) : 2=2.08%, 4=2.44%, 10=6.51%, 20=6.48%, 50=18.33% lat (msec) : 100=31.32%, 250=25.42%, 500=1.37%, 750=0.03%, 2000=0.03% cpu : usr=0.05%, sys=2.95%, ctx=6698, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=143559: Mon Aug 10 20:03:26 2026 read: IOPS=6, BW=27.1KiB/s (27.8kB/s)(6052KiB/223132msec) clat (usec): min=32, max=512066, avg=71950.62, stdev=55273.78 lat (usec): min=32, max=512067, avg=71958.03, stdev=55274.88 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 58], 10.00th=[ 72], 20.00th=[ 32113], | 30.00th=[ 42730], 40.00th=[ 51643], 50.00th=[ 61080], 60.00th=[ 74974], | 70.00th=[ 90702], 80.00th=[110625], 90.00th=[143655], 95.00th=[166724], | 99.00th=[219153], 99.50th=[308282], 99.90th=[471860], 99.95th=[513803], | 99.99th=[513803] bw ( KiB/s): min= 6, max= 87, per=25.77%, avg=27.57, stdev=14.20, samples=422 iops : min= 1, max= 21, avg= 6.23, stdev= 3.60, samples=422 write: IOPS=6, BW=27.9KiB/s (28.6kB/s)(6236KiB/223132msec); 0 zone resets clat (usec): min=1220, max=625574, avg=73110.22, stdev=72940.25 lat (usec): min=1221, max=625576, avg=73114.05, stdev=72941.93 clat percentiles (usec): | 1.00th=[ 1319], 5.00th=[ 2343], 10.00th=[ 4686], 20.00th=[ 9634], | 30.00th=[ 18220], 40.00th=[ 35914], 50.00th=[ 54264], 60.00th=[ 73925], | 70.00th=[ 96994], 80.00th=[125305], 90.00th=[168821], 95.00th=[210764], | 99.00th=[316670], 99.50th=[354419], 99.90th=[526386], 99.95th=[624952], | 99.99th=[624952] bw ( KiB/s): min= 7, max= 79, per=24.89%, avg=27.88, stdev=14.10, samples=430 iops : min= 1, max= 19, avg= 6.31, stdev= 3.55, samples=430 lat (usec) : 50=0.62%, 100=5.21%, 250=0.16%, 500=0.13%, 750=0.10% lat (msec) : 2=2.57%, 4=2.02%, 10=6.35%, 20=6.32%, 50=19.34% lat (msec) : 100=30.14%, 250=25.59%, 500=1.37%, 750=0.10% cpu : usr=0.04%, sys=2.89%, ctx=6539, 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=107KiB/s (110kB/s), 26.9KiB/s-27.4KiB/s (27.5kB/s-28.1kB/s), io=23.4MiB (24.6MB), run=218394-224223msec WRITE: bw=112KiB/s (115kB/s), 27.9KiB/s-28.8KiB/s (28.6kB/s-29.5kB/s), io=24.6MiB (25.7MB), run=218394-224223msec rand-rw: (groupid=0, jobs=1): err= 0: pid=143551: Mon Aug 10 20:07:42 2026 read: IOPS=3, BW=12.4KiB/s (12.7kB/s)(5992KiB/483636msec) clat (msec): min=7, max=1328, avg=64.45, stdev=66.68 lat (msec): min=7, max=1328, avg=64.46, stdev=66.68 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 27], | 30.00th=[ 32], 40.00th=[ 37], 50.00th=[ 44], 60.00th=[ 54], | 70.00th=[ 67], 80.00th=[ 87], 90.00th=[ 133], 95.00th=[ 182], | 99.00th=[ 284], 99.50th=[ 342], 99.90th=[ 693], 99.95th=[ 1334], | 99.99th=[ 1334] bw ( KiB/s): min= 7, max= 71, per=35.86%, avg=17.57, stdev=11.84, samples=650 iops : min= 1, max= 17, avg= 3.77, stdev= 3.02, samples=650 write: IOPS=3, BW=13.0KiB/s (13.3kB/s)(6296KiB/483636msec); 0 zone resets clat (msec): min=61, max=1361, avg=245.53, stdev=133.81 lat (msec): min=61, max=1361, avg=245.54, stdev=133.81 clat percentiles (msec): | 1.00th=[ 80], 5.00th=[ 100], 10.00th=[ 118], 20.00th=[ 144], | 30.00th=[ 163], 40.00th=[ 182], 50.00th=[ 209], 60.00th=[ 241], | 70.00th=[ 275], 80.00th=[ 338], 90.00th=[ 435], 95.00th=[ 514], | 99.00th=[ 667], 99.50th=[ 726], 99.90th=[ 978], 99.95th=[ 1368], | 99.99th=[ 1368] bw ( KiB/s): min= 7, max= 39, per=26.46%, avg=13.50, stdev= 6.66, samples=876 iops : min= 1, max= 9, avg= 2.74, stdev= 1.74, samples=876 lat (msec) : 10=0.13%, 20=3.97%, 50=23.24%, 100=16.08%, 250=37.11% lat (msec) : 500=16.41%, 750=2.80%, 1000=0.20%, 2000=0.07% cpu : usr=0.03%, sys=0.91%, ctx=5738, 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=143552: Mon Aug 10 20:07:42 2026 read: IOPS=3, BW=12.2KiB/s (12.5kB/s)(5940KiB/484930msec) clat (msec): min=7, max=1240, avg=63.69, stdev=64.73 lat (msec): min=7, max=1240, avg=63.70, stdev=64.73 clat percentiles (msec): | 1.00th=[ 12], 5.00th=[ 17], 10.00th=[ 21], 20.00th=[ 26], | 30.00th=[ 32], 40.00th=[ 38], 50.00th=[ 44], 60.00th=[ 54], | 70.00th=[ 68], 80.00th=[ 86], 90.00th=[ 134], 95.00th=[ 176], | 99.00th=[ 279], 99.50th=[ 317], 99.90th=[ 743], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 7, max= 71, per=35.26%, avg=17.28, stdev=11.93, samples=655 iops : min= 1, max= 17, avg= 3.70, stdev= 3.03, samples=655 write: IOPS=3, BW=13.1KiB/s (13.4kB/s)(6348KiB/484930msec); 0 zone resets clat (msec): min=43, max=958, avg=245.60, stdev=136.22 lat (msec): min=43, max=958, avg=245.61, stdev=136.22 clat percentiles (msec): | 1.00th=[ 73], 5.00th=[ 95], 10.00th=[ 115], 20.00th=[ 140], | 30.00th=[ 163], 40.00th=[ 184], 50.00th=[ 207], 60.00th=[ 234], | 70.00th=[ 275], 80.00th=[ 342], 90.00th=[ 439], 95.00th=[ 523], | 99.00th=[ 701], 99.50th=[ 785], 99.90th=[ 869], 99.95th=[ 961], | 99.99th=[ 961] bw ( KiB/s): min= 7, max= 40, per=26.82%, avg=13.68, stdev= 6.59, samples=873 iops : min= 1, max= 10, avg= 2.79, stdev= 1.73, samples=873 lat (msec) : 10=0.13%, 20=4.56%, 50=22.72%, 100=16.76%, 250=36.78% lat (msec) : 500=15.72%, 750=2.93%, 1000=0.36%, 2000=0.03% cpu : usr=0.03%, sys=0.90%, ctx=5734, 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=143553: Mon Aug 10 20:07:42 2026 read: IOPS=3, BW=12.4KiB/s (12.7kB/s)(6028KiB/484777msec) clat (msec): min=9, max=748, avg=66.54, stdev=61.83 lat (msec): min=9, max=748, avg=66.55, stdev=61.83 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 18], 10.00th=[ 22], 20.00th=[ 27], | 30.00th=[ 33], 40.00th=[ 40], 50.00th=[ 47], 60.00th=[ 57], | 70.00th=[ 70], 80.00th=[ 93], 90.00th=[ 138], 95.00th=[ 184], | 99.00th=[ 292], 99.50th=[ 368], 99.90th=[ 693], 99.95th=[ 751], | 99.99th=[ 751] bw ( KiB/s): min= 7, max= 79, per=34.09%, avg=16.71, stdev=11.64, samples=685 iops : min= 1, max= 19, avg= 3.55, stdev= 2.95, samples=685 write: IOPS=3, BW=12.9KiB/s (13.2kB/s)(6260KiB/484777msec); 0 zone resets clat (msec): min=60, max=1369, avg=245.28, stdev=136.99 lat (msec): min=60, max=1369, avg=245.29, stdev=136.99 clat percentiles (msec): | 1.00th=[ 80], 5.00th=[ 102], 10.00th=[ 117], 20.00th=[ 140], | 30.00th=[ 159], 40.00th=[ 182], 50.00th=[ 205], 60.00th=[ 232], | 70.00th=[ 275], 80.00th=[ 334], 90.00th=[ 447], 95.00th=[ 518], | 99.00th=[ 642], 99.50th=[ 693], 99.90th=[ 1368], 99.95th=[ 1368], | 99.99th=[ 1368] bw ( KiB/s): min= 7, max= 39, per=26.38%, avg=13.45, stdev= 6.61, samples=873 iops : min= 1, max= 9, avg= 2.73, stdev= 1.74, samples=873 lat (msec) : 10=0.07%, 20=3.91%, 50=22.66%, 100=15.95%, 250=38.25% lat (msec) : 500=15.89%, 750=3.12%, 1000=0.10%, 2000=0.07% cpu : usr=0.03%, sys=0.88%, ctx=5804, 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=143554: Mon Aug 10 20:07:42 2026 read: IOPS=3, BW=12.6KiB/s (12.9kB/s)(6052KiB/480605msec) clat (msec): min=8, max=701, avg=64.22, stdev=56.90 lat (msec): min=8, max=701, avg=64.23, stdev=56.90 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 27], | 30.00th=[ 32], 40.00th=[ 39], 50.00th=[ 46], 60.00th=[ 56], | 70.00th=[ 69], 80.00th=[ 88], 90.00th=[ 138], 95.00th=[ 180], | 99.00th=[ 275], 99.50th=[ 338], 99.90th=[ 460], 99.95th=[ 701], | 99.99th=[ 701] bw ( KiB/s): min= 7, max= 79, per=35.84%, avg=17.56, stdev=12.31, samples=657 iops : min= 1, max= 19, avg= 3.77, stdev= 3.14, samples=657 write: IOPS=3, BW=12.0KiB/s (13.3kB/s)(6236KiB/480605msec); 0 zone resets clat (msec): min=49, max=1378, avg=245.55, stdev=136.31 lat (msec): min=49, max=1378, avg=245.55, stdev=136.31 clat percentiles (msec): | 1.00th=[ 78], 5.00th=[ 103], 10.00th=[ 117], 20.00th=[ 140], | 30.00th=[ 159], 40.00th=[ 184], 50.00th=[ 205], 60.00th=[ 234], | 70.00th=[ 275], 80.00th=[ 342], 90.00th=[ 435], 95.00th=[ 527], | 99.00th=[ 667], 99.50th=[ 760], 99.90th=[ 1028], 99.95th=[ 1385], | 99.99th=[ 1385] bw ( KiB/s): min= 7, max= 32, per=26.46%, avg=13.50, stdev= 6.56, samples=868 iops : min= 1, max= 8, avg= 2.74, stdev= 1.71, samples=868 lat (msec) : 10=0.03%, 20=4.56%, 50=22.40%, 100=16.70%, 250=37.66% lat (msec) : 500=15.82%, 750=2.57%, 1000=0.16%, 2000=0.10% cpu : usr=0.03%, sys=0.88%, ctx=5834, 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=49.5KiB/s (50.7kB/s), 12.2KiB/s-12.6KiB/s (12.5kB/s-12.9kB/s), io=23.4MiB (24.6MB), run=480605-484930msec WRITE: bw=51.8KiB/s (53.1kB/s), 12.9KiB/s-13.1KiB/s (13.2kB/s-13.4kB/s), io=24.6MiB (25.7MB), run=480605-484930msec 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=143652: Mon Aug 10 20:08:37 2026 read: IOPS=8, BW=135KiB/s (138kB/s)(5920KiB/43924msec) clat (usec): min=32, max=468409, avg=58850.82, stdev=54712.30 lat (usec): min=32, max=468411, avg=58865.86, stdev=54698.44 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 55], 10.00th=[ 62], 20.00th=[ 79], | 30.00th=[ 21890], 40.00th=[ 42206], 50.00th=[ 53740], 60.00th=[ 68682], | 70.00th=[ 82314], 80.00th=[ 95945], 90.00th=[124257], 95.00th=[149947], | 99.00th=[221250], 99.50th=[250610], 99.90th=[467665], 99.95th=[467665], | 99.99th=[467665] bw ( KiB/s): min= 31, max= 377, per=26.31%, avg=137.85, stdev=60.97, samples=84 iops : min= 1, max= 23, avg= 7.79, stdev= 3.87, samples=84 write: IOPS=9, BW=145KiB/s (148kB/s)(6368KiB/43924msec); 0 zone resets clat (usec): min=1574, max=424896, avg=55303.80, stdev=63522.15 lat (usec): min=1577, max=424898, avg=55312.97, stdev=63533.28 clat percentiles (usec): | 1.00th=[ 1663], 5.00th=[ 2802], 10.00th=[ 4146], 20.00th=[ 7177], | 30.00th=[ 11994], 40.00th=[ 18220], 50.00th=[ 28181], 60.00th=[ 51119], | 70.00th=[ 68682], 80.00th=[ 96994], 90.00th=[141558], 95.00th=[181404], | 99.00th=[283116], 99.50th=[287310], 99.90th=[425722], 99.95th=[425722], | 99.99th=[425722] bw ( KiB/s): min= 30, max= 381, per=26.85%, avg=147.94, stdev=76.41, samples=84 iops : min= 1, max= 23, avg= 8.43, stdev= 4.84, samples=84 lat (usec) : 50=1.95%, 100=9.64%, 250=0.91%, 500=0.26% lat (msec) : 2=1.82%, 4=3.78%, 10=9.77%, 20=7.94%, 50=16.93% lat (msec) : 100=28.65%, 250=16.80%, 500=1.56% cpu : usr=0.05%, sys=3.42%, ctx=1369, 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=143653: Mon Aug 10 20:08:37 2026 read: IOPS=8, BW=131KiB/s (135kB/s)(5744KiB/43699msec) clat (usec): min=33, max=337203, avg=61061.56, stdev=54866.66 lat (usec): min=33, max=337204, avg=61077.95, stdev=54850.29 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 56], 10.00th=[ 63], 20.00th=[ 85], | 30.00th=[ 28181], 40.00th=[ 43254], 50.00th=[ 52691], 60.00th=[ 66847], | 70.00th=[ 81265], 80.00th=[103285], 90.00th=[135267], 95.00th=[162530], | 99.00th=[223347], 99.50th=[261096], 99.90th=[337642], 99.95th=[337642], | 99.99th=[337642] bw ( KiB/s): min= 30, max= 285, per=25.49%, avg=133.58, stdev=59.87, samples=84 iops : min= 1, max= 17, avg= 7.52, stdev= 3.78, samples=84 write: IOPS=9, BW=150KiB/s (153kB/s)(6544KiB/43699msec); 0 zone resets clat (usec): min=1605, max=509252, avg=52586.02, stdev=60173.40 lat (usec): min=1607, max=509254, avg=52612.13, stdev=60178.87 clat percentiles (usec): | 1.00th=[ 1795], 5.00th=[ 3556], 10.00th=[ 4948], 20.00th=[ 7701], | 30.00th=[ 11731], 40.00th=[ 16909], 50.00th=[ 27919], 60.00th=[ 48497], | 70.00th=[ 67634], 80.00th=[ 96994], 90.00th=[130548], 95.00th=[156238], | 99.00th=[252707], 99.50th=[320865], 99.90th=[509608], 99.95th=[509608], | 99.99th=[509608] bw ( KiB/s): min= 30, max= 351, per=27.58%, avg=151.94, stdev=77.06, samples=84 iops : min= 1, max= 21, avg= 8.68, stdev= 4.88, samples=84 lat (usec) : 50=1.04%, 100=9.11%, 250=1.30%, 500=0.13%, 750=0.39% lat (usec) : 1000=0.13% lat (msec) : 2=1.30%, 4=2.86%, 10=10.42%, 20=10.42%, 50=17.45% lat (msec) : 100=25.00%, 250=19.53%, 500=0.78%, 750=0.13% cpu : usr=0.05%, sys=3.47%, ctx=1415, 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=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=143654: Mon Aug 10 20:08:37 2026 read: IOPS=8, BW=139KiB/s (142kB/s)(6256KiB/45049msec) clat (usec): min=32, max=327540, avg=58099.24, stdev=56246.08 lat (usec): min=32, max=327543, avg=58102.79, stdev=56243.90 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 53], 10.00th=[ 62], 20.00th=[ 72], | 30.00th=[ 2671], 40.00th=[ 40109], 50.00th=[ 51119], 60.00th=[ 63701], | 70.00th=[ 76022], 80.00th=[100140], 90.00th=[130548], 95.00th=[160433], | 99.00th=[250610], 99.50th=[274727], 99.90th=[329253], 99.95th=[329253], | 99.99th=[329253] bw ( KiB/s): min= 31, max= 413, per=27.46%, avg=143.91, stdev=76.12, samples=85 iops : min= 1, max= 25, avg= 8.18, stdev= 4.81, samples=85 write: IOPS=8, BW=134KiB/s (137kB/s)(6032KiB/45049msec); 0 zone resets clat (usec): min=1573, max=473205, avg=58607.08, stdev=64774.38 lat (usec): min=1576, max=473207, avg=58615.39, stdev=64781.46 clat percentiles (usec): | 1.00th=[ 1713], 5.00th=[ 2573], 10.00th=[ 4424], 20.00th=[ 7963], | 30.00th=[ 11731], 40.00th=[ 17695], 50.00th=[ 34341], 60.00th=[ 53740], | 70.00th=[ 77071], 80.00th=[108528], 90.00th=[141558], 95.00th=[177210], | 99.00th=[256902], 99.50th=[417334], 99.90th=[471860], 99.95th=[471860], | 99.99th=[471860] bw ( KiB/s): min= 26, max= 318, per=24.38%, avg=134.36, stdev=63.21, samples=87 iops : min= 1, max= 19, avg= 7.57, stdev= 4.01, samples=87 lat (usec) : 50=1.82%, 100=11.33%, 250=0.78%, 500=0.39%, 750=0.26% lat (usec) : 1000=0.13% lat (msec) : 2=1.95%, 4=2.73%, 10=8.85%, 20=8.59%, 50=16.15% lat (msec) : 100=25.39%, 250=20.44%, 500=1.17% cpu : usr=0.05%, sys=3.56%, ctx=1467, 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=143655: Mon Aug 10 20:08:37 2026 read: IOPS=8, BW=132KiB/s (135kB/s)(6032KiB/45709msec) clat (usec): min=33, max=399357, avg=58958.31, stdev=59684.35 lat (usec): min=33, max=399359, avg=58965.78, stdev=59683.38 clat percentiles (usec): | 1.00th=[ 36], 5.00th=[ 49], 10.00th=[ 58], 20.00th=[ 71], | 30.00th=[ 1319], 40.00th=[ 38011], 50.00th=[ 51119], 60.00th=[ 63701], | 70.00th=[ 78119], 80.00th=[101188], 90.00th=[132645], 95.00th=[166724], | 99.00th=[246416], 99.50th=[392168], 99.90th=[400557], 99.95th=[400557], | 99.99th=[400557] bw ( KiB/s): min= 30, max= 477, per=25.13%, avg=131.67, stdev=72.87, samples=87 iops : min= 1, max= 29, avg= 7.40, stdev= 4.61, samples=87 write: IOPS=8, BW=137KiB/s (140kB/s)(6256KiB/45709msec); 0 zone resets clat (usec): min=1630, max=683727, avg=59452.67, stdev=70302.90 lat (usec): min=1632, max=683730, avg=59454.95, stdev=70302.89 clat percentiles (usec): | 1.00th=[ 1893], 5.00th=[ 3687], 10.00th=[ 5145], 20.00th=[ 9503], | 30.00th=[ 12911], 40.00th=[ 19792], 50.00th=[ 31065], 60.00th=[ 50594], | 70.00th=[ 74974], 80.00th=[106431], 90.00th=[149947], 95.00th=[187696], | 99.00th=[299893], 99.50th=[379585], 99.90th=[683672], 99.95th=[683672], | 99.99th=[683672] bw ( KiB/s): min= 31, max= 317, per=24.65%, avg=135.83, stdev=66.02, samples=88 iops : min= 1, max= 19, avg= 7.67, stdev= 4.20, samples=88 lat (usec) : 50=2.47%, 100=10.55%, 250=0.78%, 750=0.26%, 1000=0.26% lat (msec) : 2=1.56%, 4=2.73%, 10=8.33%, 20=9.64%, 50=17.58% lat (msec) : 100=24.61%, 250=19.92%, 500=1.17%, 750=0.13% cpu : usr=0.04%, sys=3.40%, ctx=1429, 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=524KiB/s (537kB/s), 131KiB/s-139KiB/s (135kB/s-142kB/s), io=23.4MiB (24.5MB), run=43699-45709msec WRITE: bw=551KiB/s (565kB/s), 134KiB/s-150KiB/s (137kB/s-153kB/s), io=24.6MiB (25.8MB), run=43699-45709msec rand-rw: (groupid=0, jobs=1): err= 0: pid=143657: Mon Aug 10 20:09:47 2026 read: IOPS=3, BW=51.3KiB/s (52.5kB/s)(5920KiB/115488msec) clat (msec): min=7, max=475, avg=62.68, stdev=61.16 lat (msec): min=7, max=475, avg=62.69, stdev=61.16 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 16], 10.00th=[ 21], 20.00th=[ 26], | 30.00th=[ 31], 40.00th=[ 37], 50.00th=[ 45], 60.00th=[ 55], | 70.00th=[ 68], 80.00th=[ 82], 90.00th=[ 114], 95.00th=[ 171], | 99.00th=[ 334], 99.50th=[ 464], 99.90th=[ 477], 99.95th=[ 477], | 99.99th=[ 477] bw ( KiB/s): min= 29, max= 222, per=32.08%, avg=66.41, stdev=39.56, samples=172 iops : min= 1, max= 13, avg= 3.44, stdev= 2.52, samples=172 write: IOPS=3, BW=55.1KiB/s (56.5kB/s)(6368KiB/115488msec); 0 zone resets clat (msec): min=51, max=791, avg=231.68, stdev=125.76 lat (msec): min=51, max=791, avg=231.68, stdev=125.76 clat percentiles (msec): | 1.00th=[ 60], 5.00th=[ 96], 10.00th=[ 113], 20.00th=[ 138], | 30.00th=[ 155], 40.00th=[ 178], 50.00th=[ 197], 60.00th=[ 215], | 70.00th=[ 259], 80.00th=[ 317], 90.00th=[ 397], 95.00th=[ 489], | 99.00th=[ 701], 99.50th=[ 768], 99.90th=[ 793], 99.95th=[ 793], | 99.99th=[ 793] bw ( KiB/s): min= 26, max= 159, per=26.83%, avg=58.50, stdev=26.91, samples=211 iops : min= 1, max= 9, avg= 2.94, stdev= 1.79, samples=211 lat (msec) : 10=0.13%, 20=4.30%, 50=22.01%, 100=18.62%, 250=37.50% lat (msec) : 500=15.10%, 750=2.08%, 1000=0.26% cpu : usr=0.03%, sys=0.92%, ctx=1430, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=143658: Mon Aug 10 20:09:47 2026 read: IOPS=3, BW=50.2KiB/s (51.4kB/s)(5744KiB/114423msec) clat (msec): min=9, max=367, avg=59.26, stdev=54.35 lat (msec): min=9, max=367, avg=59.27, stdev=54.35 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 17], 10.00th=[ 21], 20.00th=[ 25], | 30.00th=[ 29], 40.00th=[ 34], 50.00th=[ 42], 60.00th=[ 50], | 70.00th=[ 62], 80.00th=[ 84], 90.00th=[ 129], 95.00th=[ 169], | 99.00th=[ 317], 99.50th=[ 368], 99.90th=[ 368], 99.95th=[ 368], | 99.99th=[ 368] bw ( KiB/s): min= 27, max= 223, per=34.80%, avg=72.04, stdev=48.15, samples=155 iops : min= 1, max= 13, avg= 3.81, stdev= 3.11, samples=155 write: IOPS=3, BW=57.2KiB/s (58.6kB/s)(6544KiB/114423msec); 0 zone resets clat (msec): min=54, max=786, avg=227.61, stdev=117.76 lat (msec): min=54, max=786, avg=227.61, stdev=117.76 clat percentiles (msec): | 1.00th=[ 70], 5.00th=[ 97], 10.00th=[ 112], 20.00th=[ 138], | 30.00th=[ 161], 40.00th=[ 178], 50.00th=[ 197], 60.00th=[ 224], | 70.00th=[ 255], 80.00th=[ 305], 90.00th=[ 380], 95.00th=[ 460], | 99.00th=[ 642], 99.50th=[ 684], 99.90th=[ 785], 99.95th=[ 785], | 99.99th=[ 785] bw ( KiB/s): min= 27, max= 153, per=28.07%, avg=61.19, stdev=27.78, samples=209 iops : min= 1, max= 9, avg= 3.11, stdev= 1.83, samples=209 lat (msec) : 10=0.39%, 20=3.91%, 50=24.35%, 100=14.58%, 250=39.45% lat (msec) : 500=15.63%, 750=1.43%, 1000=0.26% cpu : usr=0.03%, sys=0.87%, ctx=1327, 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=143659: Mon Aug 10 20:09:47 2026 read: IOPS=3, BW=55.8KiB/s (57.1kB/s)(6256KiB/112201msec) clat (msec): min=10, max=519, avg=59.69, stdev=60.09 lat (msec): min=10, max=519, avg=59.69, stdev=60.09 clat percentiles (msec): | 1.00th=[ 12], 5.00th=[ 17], 10.00th=[ 20], 20.00th=[ 26], | 30.00th=[ 31], 40.00th=[ 38], 50.00th=[ 44], 60.00th=[ 51], | 70.00th=[ 61], 80.00th=[ 79], 90.00th=[ 112], 95.00th=[ 148], | 99.00th=[ 401], 99.50th=[ 451], 99.90th=[ 518], 99.95th=[ 518], | 99.99th=[ 518] bw ( KiB/s): min= 29, max= 287, per=35.64%, avg=73.77, stdev=49.11, samples=167 iops : min= 1, max= 17, avg= 3.89, stdev= 3.15, samples=167 write: IOPS=3, BW=53.8KiB/s (55.1kB/s)(6032KiB/112201msec); 0 zone resets clat (msec): min=53, max=684, avg=235.54, stdev=129.02 lat (msec): min=53, max=684, avg=235.55, stdev=129.02 clat percentiles (msec): | 1.00th=[ 69], 5.00th=[ 96], 10.00th=[ 112], 20.00th=[ 133], | 30.00th=[ 150], 40.00th=[ 180], 50.00th=[ 205], 60.00th=[ 230], | 70.00th=[ 266], 80.00th=[ 317], 90.00th=[ 422], 95.00th=[ 502], | 99.00th=[ 659], 99.50th=[ 667], 99.90th=[ 684], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 27, max= 160, per=26.27%, avg=57.27, stdev=27.53, samples=206 iops : min= 1, max= 10, avg= 2.86, stdev= 1.80, samples=206 lat (msec) : 20=5.21%, 50=25.13%, 100=16.54%, 250=36.72%, 500=13.93% lat (msec) : 750=2.47% cpu : usr=0.02%, sys=0.88%, ctx=1483, 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=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=143660: Mon Aug 10 20:09:47 2026 read: IOPS=3, BW=52.5KiB/s (53.8kB/s)(6032KiB/114863msec) clat (msec): min=9, max=425, avg=63.41, stdev=58.16 lat (msec): min=9, max=425, avg=63.42, stdev=58.16 clat percentiles (msec): | 1.00th=[ 12], 5.00th=[ 17], 10.00th=[ 20], 20.00th=[ 27], | 30.00th=[ 32], 40.00th=[ 38], 50.00th=[ 44], 60.00th=[ 51], | 70.00th=[ 67], 80.00th=[ 87], 90.00th=[ 136], 95.00th=[ 174], | 99.00th=[ 347], 99.50th=[ 388], 99.90th=[ 426], 99.95th=[ 426], | 99.99th=[ 426] bw ( KiB/s): min= 30, max= 256, per=35.43%, avg=73.34, stdev=51.26, samples=160 iops : min= 1, max= 16, avg= 3.89, stdev= 3.27, samples=160 write: IOPS=3, BW=54.5KiB/s (55.8kB/s)(6256KiB/114863msec); 0 zone resets clat (msec): min=54, max=761, avg=232.28, stdev=119.84 lat (msec): min=54, max=761, avg=232.29, stdev=119.85 clat percentiles (msec): | 1.00th=[ 70], 5.00th=[ 97], 10.00th=[ 113], 20.00th=[ 138], | 30.00th=[ 159], 40.00th=[ 180], 50.00th=[ 207], 60.00th=[ 226], | 70.00th=[ 262], 80.00th=[ 305], 90.00th=[ 393], 95.00th=[ 477], | 99.00th=[ 625], 99.50th=[ 684], 99.90th=[ 760], 99.95th=[ 760], | 99.99th=[ 760] bw ( KiB/s): min= 26, max= 128, per=26.70%, avg=58.20, stdev=27.28, samples=210 iops : min= 1, max= 8, avg= 2.93, stdev= 1.82, samples=210 lat (msec) : 10=0.13%, 20=5.34%, 50=23.70%, 100=14.06%, 250=39.45% lat (msec) : 500=15.36%, 750=1.82%, 1000=0.13% cpu : usr=0.03%, sys=0.89%, ctx=1379, 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=207KiB/s (212kB/s), 50.2KiB/s-55.8KiB/s (51.4kB/s-57.1kB/s), io=23.4MiB (24.5MB), run=112201-115488msec WRITE: bw=218KiB/s (223kB/s), 53.8KiB/s-57.2KiB/s (55.1kB/s-58.6kB/s), io=24.6MiB (25.8MB), run=112201-115488msec 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=143687: Mon Aug 10 20:10:08 2026 read: IOPS=1, BW=1221KiB/s (1250kB/s)(7168KiB/5872msec) clat (usec): min=493, max=785840, avg=446657.18, stdev=266785.95 lat (usec): min=494, max=785841, avg=446658.46, stdev=266785.89 clat percentiles (usec): | 1.00th=[ 494], 5.00th=[ 494], 10.00th=[ 494], 20.00th=[312476], | 30.00th=[367002], 40.00th=[367002], 50.00th=[408945], 60.00th=[522191], | 70.00th=[522191], 80.00th=[734004], 90.00th=[784335], 95.00th=[784335], | 99.00th=[784335], 99.50th=[784335], 99.90th=[784335], 99.95th=[784335], | 99.99th=[784335] bw ( KiB/s): min= 1917, max= 2039, per=79.34%, avg=1991.33, stdev=52.50, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 write: IOPS=0, BW=872KiB/s (893kB/s)(5120KiB/5872msec); 0 zone resets clat (msec): min=239, max=827, avg=535.01, stdev=239.61 lat (msec): min=240, max=827, avg=536.25, stdev=238.70 clat percentiles (msec): | 1.00th=[ 241], 5.00th=[ 241], 10.00th=[ 241], 20.00th=[ 241], | 30.00th=[ 380], 40.00th=[ 380], 50.00th=[ 514], 60.00th=[ 514], | 70.00th=[ 718], 80.00th=[ 718], 90.00th=[ 827], 95.00th=[ 827], | 99.00th=[ 827], 99.50th=[ 827], 99.90th=[ 827], 99.95th=[ 827], | 99.99th=[ 827] bw ( KiB/s): min= 2003, max= 4087, per=77.07%, avg=2708.33, stdev=1194.07, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 500=8.33% lat (msec) : 250=8.33%, 500=33.33%, 750=33.33%, 1000=16.67% cpu : usr=0.00%, sys=5.72%, ctx=164, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=143688: Mon Aug 10 20:10:08 2026 read: IOPS=0, BW=251KiB/s (257kB/s)(2048KiB/8159msec) clat (msec): min=7, max=290, avg=148.60, stdev=200.23 lat (msec): min=7, max=290, avg=148.60, stdev=200.23 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 8], 10.00th=[ 8], 20.00th=[ 8], | 30.00th=[ 8], 40.00th=[ 8], 50.00th=[ 8], 60.00th=[ 292], | 70.00th=[ 292], 80.00th=[ 292], 90.00th=[ 292], 95.00th=[ 292], | 99.00th=[ 292], 99.50th=[ 292], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 1563, max= 1753, per=66.06%, avg=1658.00, stdev=134.35, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1255KiB/s (1285kB/s)(10.0MiB/8159msec); 0 zone resets clat (msec): min=269, max=1707, avg=778.49, stdev=517.38 lat (msec): min=269, max=1707, avg=778.67, stdev=517.53 clat percentiles (msec): | 1.00th=[ 271], 5.00th=[ 271], 10.00th=[ 271], 20.00th=[ 305], | 30.00th=[ 380], 40.00th=[ 472], 50.00th=[ 634], 60.00th=[ 659], | 70.00th=[ 760], 80.00th=[ 961], 90.00th=[ 1636], 95.00th=[ 1703], | 99.00th=[ 1703], 99.50th=[ 1703], 99.90th=[ 1703], 99.95th=[ 1703], | 99.99th=[ 1703] bw ( KiB/s): min= 1855, max= 4087, per=69.38%, avg=2438.00, stdev=847.70, samples=7 iops : min= 1, max= 3, avg= 1.57, stdev= 0.98, samples=7 lat (msec) : 10=8.33%, 500=41.67%, 750=16.67%, 1000=16.67%, 2000=16.67% cpu : usr=0.00%, sys=5.59%, ctx=162, 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=143689: Mon Aug 10 20:10:08 2026 read: IOPS=0, BW=924KiB/s (946kB/s)(6144KiB/6650msec) clat (usec): min=555, max=724311, avg=305847.20, stdev=256633.74 lat (usec): min=556, max=724311, avg=305848.54, stdev=256633.63 clat percentiles (usec): | 1.00th=[ 553], 5.00th=[ 553], 10.00th=[ 553], 20.00th=[116917], | 30.00th=[116917], 40.00th=[208667], 50.00th=[208667], 60.00th=[367002], | 70.00th=[417334], 80.00th=[417334], 90.00th=[725615], 95.00th=[725615], | 99.00th=[725615], 99.50th=[725615], 99.90th=[725615], 99.95th=[725615], | 99.99th=[725615] bw ( KiB/s): min= 2019, max= 4087, per=100.00%, avg=3371.00, stdev=1171.55, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=0, BW=924KiB/s (946kB/s)(6144KiB/6650msec); 0 zone resets clat (msec): min=446, max=1152, avg=791.98, stdev=281.31 lat (msec): min=446, max=1153, avg=792.11, stdev=281.36 clat percentiles (msec): | 1.00th=[ 447], 5.00th=[ 447], 10.00th=[ 447], 20.00th=[ 584], | 30.00th=[ 584], 40.00th=[ 625], 50.00th=[ 625], 60.00th=[ 902], | 70.00th=[ 1045], 80.00th=[ 1045], 90.00th=[ 1150], 95.00th=[ 1150], | 99.00th=[ 1150], 99.50th=[ 1150], 99.90th=[ 1150], 99.95th=[ 1150], | 99.99th=[ 1150] bw ( KiB/s): min= 1855, max= 2035, per=55.96%, avg=1966.33, stdev=69.77, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (usec) : 750=8.33% lat (msec) : 250=16.67%, 500=25.00%, 750=25.00%, 1000=8.33%, 2000=16.67% cpu : usr=0.00%, sys=4.90%, ctx=173, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=143690: Mon Aug 10 20:10:08 2026 read: IOPS=0, BW=809KiB/s (829kB/s)(5120KiB/6326msec) clat (usec): min=480, max=564461, avg=285695.76, stdev=273831.14 lat (usec): min=482, max=564463, avg=285697.20, stdev=273831.20 clat percentiles (usec): | 1.00th=[ 482], 5.00th=[ 482], 10.00th=[ 482], 20.00th=[ 482], | 30.00th=[ 7898], 40.00th=[ 7898], 50.00th=[320865], 60.00th=[320865], | 70.00th=[534774], 80.00th=[534774], 90.00th=[566232], 95.00th=[566232], | 99.00th=[566232], 99.50th=[566232], 99.90th=[566232], 99.95th=[566232], | 99.99th=[566232] bw ( KiB/s): min= 2003, max= 6035, per=100.00%, avg=4019.00, stdev=2851.05, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1133KiB/s (1160kB/s)(7168KiB/6326msec); 0 zone resets clat (msec): min=277, max=963, avg=692.31, stdev=253.14 lat (msec): min=280, max=963, avg=693.74, stdev=252.79 clat percentiles (msec): | 1.00th=[ 279], 5.00th=[ 279], 10.00th=[ 279], 20.00th=[ 489], | 30.00th=[ 558], 40.00th=[ 558], 50.00th=[ 793], 60.00th=[ 877], | 70.00th=[ 877], 80.00th=[ 885], 90.00th=[ 961], 95.00th=[ 961], | 99.00th=[ 961], 99.50th=[ 961], 99.90th=[ 961], 99.95th=[ 961], | 99.99th=[ 961] bw ( KiB/s): min= 1563, max= 2043, per=55.61%, avg=1954.14, stdev=174.93, samples=7 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=7 lat (usec) : 500=8.33% lat (msec) : 10=8.33%, 500=25.00%, 750=25.00%, 1000=33.33% cpu : usr=0.00%, sys=5.09%, ctx=160, 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=2510KiB/s (2570kB/s), 251KiB/s-1221KiB/s (257kB/s-1250kB/s), io=20.0MiB (20.0MB), run=5872-8159msec WRITE: bw=3514KiB/s (3598kB/s), 872KiB/s-1255KiB/s (893kB/s-1285kB/s), io=28.0MiB (29.4MB), run=5872-8159msec rand-rw: (groupid=0, jobs=1): err= 0: pid=143692: Mon Aug 10 20:10:08 2026 read: IOPS=0, BW=964KiB/s (987kB/s)(7168KiB/7439msec) clat (msec): min=106, max=1172, avg=541.08, stdev=391.76 lat (msec): min=106, max=1172, avg=541.08, stdev=391.76 clat percentiles (msec): | 1.00th=[ 107], 5.00th=[ 107], 10.00th=[ 107], 20.00th=[ 279], | 30.00th=[ 313], 40.00th=[ 313], 50.00th=[ 430], 60.00th=[ 502], | 70.00th=[ 502], 80.00th=[ 986], 90.00th=[ 1167], 95.00th=[ 1167], | 99.00th=[ 1167], 99.50th=[ 1167], 99.90th=[ 1167], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 1456, max= 4055, per=91.15%, avg=2268.60, stdev=1022.45, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 write: IOPS=0, BW=688KiB/s (705kB/s)(5120KiB/7439msec); 0 zone resets clat (msec): min=461, max=990, avg=654.56, stdev=207.22 lat (msec): min=461, max=990, avg=654.66, stdev=207.23 clat percentiles (msec): | 1.00th=[ 460], 5.00th=[ 460], 10.00th=[ 460], 20.00th=[ 460], | 30.00th=[ 542], 40.00th=[ 542], 50.00th=[ 575], 60.00th=[ 575], | 70.00th=[ 701], 80.00th=[ 701], 90.00th=[ 995], 95.00th=[ 995], | 99.00th=[ 995], 99.50th=[ 995], 99.90th=[ 995], 99.95th=[ 995], | 99.99th=[ 995] bw ( KiB/s): min= 1780, max= 2043, per=56.14%, avg=1956.50, stdev=120.13, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 250=8.33%, 500=41.67%, 750=25.00%, 1000=16.67%, 2000=8.33% cpu : usr=0.01%, sys=1.98%, ctx=85, 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=143693: Mon Aug 10 20:10:08 2026 read: IOPS=0, BW=255KiB/s (261kB/s)(2048KiB/8036msec) clat (msec): min=210, max=226, avg=218.76, stdev=11.08 lat (msec): min=210, max=226, avg=218.77, stdev=11.08 clat percentiles (msec): | 1.00th=[ 211], 5.00th=[ 211], 10.00th=[ 211], 20.00th=[ 211], | 30.00th=[ 211], 40.00th=[ 211], 50.00th=[ 211], 60.00th=[ 228], | 70.00th=[ 228], 80.00th=[ 228], 90.00th=[ 228], 95.00th=[ 228], | 99.00th=[ 228], 99.50th=[ 228], 99.90th=[ 228], 99.95th=[ 228], | 99.99th=[ 228] bw ( KiB/s): min= 1501, max= 1996, per=70.25%, avg=1748.50, stdev=350.02, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1274KiB/s (1305kB/s)(10.0MiB/8036msec); 0 zone resets clat (msec): min=136, max=1711, avg=731.23, stdev=518.63 lat (msec): min=136, max=1711, avg=731.36, stdev=518.60 clat percentiles (msec): | 1.00th=[ 136], 5.00th=[ 136], 10.00th=[ 136], 20.00th=[ 321], | 30.00th=[ 351], 40.00th=[ 439], 50.00th=[ 485], 60.00th=[ 558], | 70.00th=[ 860], 80.00th=[ 995], 90.00th=[ 1469], 95.00th=[ 1720], | 99.00th=[ 1720], 99.50th=[ 1720], 99.90th=[ 1720], 99.95th=[ 1720], | 99.99th=[ 1720] bw ( KiB/s): min= 1992, max= 4096, per=65.32%, avg=2276.50, stdev=735.43, samples=8 iops : min= 1, max= 4, avg= 1.38, stdev= 1.06, samples=8 lat (msec) : 250=25.00%, 500=33.33%, 750=8.33%, 1000=16.67%, 2000=16.67% cpu : usr=0.01%, sys=1.85%, ctx=73, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=143694: Mon Aug 10 20:10:08 2026 read: IOPS=0, BW=833KiB/s (853kB/s)(6144KiB/7376msec) clat (msec): min=140, max=1149, avg=509.90, stdev=413.16 lat (msec): min=140, max=1149, avg=509.90, stdev=413.16 clat percentiles (msec): | 1.00th=[ 140], 5.00th=[ 140], 10.00th=[ 140], 20.00th=[ 188], | 30.00th=[ 188], 40.00th=[ 279], 50.00th=[ 279], 60.00th=[ 414], | 70.00th=[ 885], 80.00th=[ 885], 90.00th=[ 1150], 95.00th=[ 1150], | 99.00th=[ 1150], 99.50th=[ 1150], 99.90th=[ 1150], 99.95th=[ 1150], | 99.99th=[ 1150] bw ( KiB/s): min= 1984, max= 4087, per=100.00%, avg=2696.67, stdev=1204.19, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=0, BW=833KiB/s (853kB/s)(6144KiB/7376msec); 0 zone resets clat (msec): min=283, max=1512, avg=685.33, stdev=458.32 lat (msec): min=283, max=1512, avg=685.43, stdev=458.31 clat percentiles (msec): | 1.00th=[ 284], 5.00th=[ 284], 10.00th=[ 284], 20.00th=[ 430], | 30.00th=[ 430], 40.00th=[ 481], 50.00th=[ 481], 60.00th=[ 485], | 70.00th=[ 927], 80.00th=[ 927], 90.00th=[ 1519], 95.00th=[ 1519], | 99.00th=[ 1519], 99.50th=[ 1519], 99.90th=[ 1519], 99.95th=[ 1519], | 99.99th=[ 1519] bw ( KiB/s): min= 1848, max= 4000, per=70.42%, avg=2454.00, stdev=1032.66, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 250=16.67%, 500=50.00%, 1000=16.67%, 2000=16.67% cpu : usr=0.04%, sys=1.97%, ctx=92, 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=143695: Mon Aug 10 20:10:08 2026 read: IOPS=0, BW=622KiB/s (637kB/s)(5120KiB/8225msec) clat (msec): min=146, max=296, avg=188.82, stdev=62.13 lat (msec): min=146, max=296, avg=188.82, stdev=62.13 clat percentiles (msec): | 1.00th=[ 146], 5.00th=[ 146], 10.00th=[ 146], 20.00th=[ 146], | 30.00th=[ 150], 40.00th=[ 150], 50.00th=[ 171], 60.00th=[ 171], | 70.00th=[ 182], 80.00th=[ 182], 90.00th=[ 296], 95.00th=[ 296], | 99.00th=[ 296], 99.50th=[ 296], 99.90th=[ 296], 99.95th=[ 296], | 99.99th=[ 296] bw ( KiB/s): min= 2043, max= 3968, per=100.00%, avg=2686.33, stdev=1109.96, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 write: IOPS=0, BW=871KiB/s (892kB/s)(7168KiB/8225msec); 0 zone resets clat (msec): min=144, max=1835, avg=997.46, stdev=730.61 lat (msec): min=144, max=1835, avg=997.60, stdev=730.60 clat percentiles (msec): | 1.00th=[ 144], 5.00th=[ 144], 10.00th=[ 144], 20.00th=[ 288], | 30.00th=[ 592], 40.00th=[ 592], 50.00th=[ 709], 60.00th=[ 1603], | 70.00th=[ 1603], 80.00th=[ 1804], 90.00th=[ 1838], 95.00th=[ 1838], | 99.00th=[ 1838], 99.50th=[ 1838], 99.90th=[ 1838], 99.95th=[ 1838], | 99.99th=[ 1838] bw ( KiB/s): min= 1780, max= 4055, per=68.28%, avg=2379.40, stdev=942.59, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 250=41.67%, 500=16.67%, 750=16.67%, 2000=25.00% cpu : usr=0.01%, sys=1.88%, ctx=83, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2490KiB/s (2550kB/s), 255KiB/s-964KiB/s (261kB/s-987kB/s), io=20.0MiB (20.0MB), run=7376-8225msec WRITE: bw=3486KiB/s (3570kB/s), 688KiB/s-1274KiB/s (705kB/s-1305kB/s), io=28.0MiB (29.4MB), run=7376-8225msec 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=143702: Mon Aug 10 20:10:28 2026 read: IOPS=0, BW=1544KiB/s (1581kB/s)(12.0MiB/7957msec) clat (msec): min=1252, max=5132, avg=2630.59, stdev=2170.63 lat (msec): min=1252, max=5132, avg=2630.59, stdev=2170.63 clat percentiles (msec): | 1.00th=[ 1250], 5.00th=[ 1250], 10.00th=[ 1250], 20.00th=[ 1250], | 30.00th=[ 1250], 40.00th=[ 1502], 50.00th=[ 1502], 60.00th=[ 1502], | 70.00th=[ 5134], 80.00th=[ 5134], 90.00th=[ 5134], 95.00th=[ 5134], | 99.00th=[ 5134], 99.50th=[ 5134], 99.90th=[ 5134], 99.95th=[ 5134], | 99.99th=[ 5134] bw ( KiB/s): min= 7846, max= 8110, per=100.00%, avg=7978.00, stdev=186.68, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 2000=66.67%, >=2000=33.33% cpu : usr=0.10%, sys=4.83%, ctx=636, 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=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=143703: Mon Aug 10 20:10:28 2026 read: IOPS=0, BW=433KiB/s (443kB/s)(4096KiB/9466msec) clat (nsec): min=4926.9M, max=4926.9M, avg=4926914231.00, stdev= 0.00 lat (nsec): min=4926.9M, max=4926.9M, avg=4926916610.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 4933], 5.00th=[ 4933], 10.00th=[ 4933], 20.00th=[ 4933], | 30.00th=[ 4933], 40.00th=[ 4933], 50.00th=[ 4933], 60.00th=[ 4933], | 70.00th=[ 4933], 80.00th=[ 4933], 90.00th=[ 4933], 95.00th=[ 4933], | 99.00th=[ 4933], 99.50th=[ 4933], 99.90th=[ 4933], 99.95th=[ 4933], | 99.99th=[ 4933] bw ( KiB/s): min= 7892, max= 7892, per=100.00%, avg=7892.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=865KiB/s (886kB/s)(8192KiB/9466msec); 0 zone resets clat (msec): min=1494, max=2928, avg=2211.60, stdev=1013.79 lat (msec): min=1495, max=2928, avg=2212.06, stdev=1013.87 clat percentiles (msec): | 1.00th=[ 1502], 5.00th=[ 1502], 10.00th=[ 1502], 20.00th=[ 1502], | 30.00th=[ 1502], 40.00th=[ 1502], 50.00th=[ 1502], 60.00th=[ 2937], | 70.00th=[ 2937], 80.00th=[ 2937], 90.00th=[ 2937], 95.00th=[ 2937], | 99.00th=[ 2937], 99.50th=[ 2937], 99.90th=[ 2937], 99.95th=[ 2937], | 99.99th=[ 2937] 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) : 2000=33.33%, >=2000=66.67% cpu : usr=0.08%, sys=2.30%, ctx=436, 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=143704: Mon Aug 10 20:10:28 2026 write: IOPS=0, BW=1308KiB/s (1339kB/s)(12.0MiB/9394msec); 0 zone resets clat (msec): min=1349, max=5421, avg=3093.66, stdev=2097.69 lat (msec): min=1349, max=5423, avg=3095.76, stdev=2098.10 clat percentiles (msec): | 1.00th=[ 1351], 5.00th=[ 1351], 10.00th=[ 1351], 20.00th=[ 1351], | 30.00th=[ 1351], 40.00th=[ 2500], 50.00th=[ 2500], 60.00th=[ 2500], | 70.00th=[ 5403], 80.00th=[ 5403], 90.00th=[ 5403], 95.00th=[ 5403], | 99.00th=[ 5403], 99.50th=[ 5403], 99.90th=[ 5403], 99.95th=[ 5403], | 99.99th=[ 5403] bw ( KiB/s): min= 8094, max= 8110, per=100.00%, avg=8102.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 2000=33.33%, >=2000=66.67% cpu : usr=0.00%, sys=1.72%, ctx=77, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=143705: Mon Aug 10 20:10:28 2026 write: IOPS=0, BW=1729KiB/s (1770kB/s)(12.0MiB/7107msec); 0 zone resets clat (msec): min=627, max=5415, avg=2339.72, stdev=2669.12 lat (msec): min=628, max=5416, avg=2349.16, stdev=2662.80 clat percentiles (msec): | 1.00th=[ 625], 5.00th=[ 625], 10.00th=[ 625], 20.00th=[ 625], | 30.00th=[ 625], 40.00th=[ 978], 50.00th=[ 978], 60.00th=[ 978], | 70.00th=[ 5403], 80.00th=[ 5403], 90.00th=[ 5403], 95.00th=[ 5403], | 99.00th=[ 5403], 99.50th=[ 5403], 99.90th=[ 5403], 99.95th=[ 5403], | 99.99th=[ 5403] bw ( KiB/s): min= 8078, max= 8175, per=100.00%, avg=8126.50, stdev=68.59, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, >=2000=33.33% cpu : usr=0.06%, sys=1.41%, ctx=51, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=1731KiB/s (1772kB/s), 433KiB/s-1544KiB/s (443kB/s-1581kB/s), io=16.0MiB (16.8MB), run=7957-9466msec WRITE: bw=3462KiB/s (3545kB/s), 865KiB/s-1729KiB/s (886kB/s-1770kB/s), io=32.0MiB (33.6MB), run=7107-9466msec rand-rw: (groupid=0, jobs=1): err= 0: pid=143707: Mon Aug 10 20:10:29 2026 read: IOPS=0, BW=1407KiB/s (1441kB/s)(12.0MiB/8735msec) clat (msec): min=1388, max=4854, avg=2884.94, stdev=1780.58 lat (msec): min=1388, max=4854, avg=2884.94, stdev=1780.58 clat percentiles (msec): | 1.00th=[ 1385], 5.00th=[ 1385], 10.00th=[ 1385], 20.00th=[ 1385], | 30.00th=[ 1385], 40.00th=[ 2400], 50.00th=[ 2400], 60.00th=[ 2400], | 70.00th=[ 4866], 80.00th=[ 4866], 90.00th=[ 4866], 95.00th=[ 4866], | 99.00th=[ 4866], 99.50th=[ 4866], 99.90th=[ 4866], 99.95th=[ 4866], | 99.99th=[ 4866] bw ( KiB/s): min= 8047, max= 8192, per=100.00%, avg=8119.50, stdev=102.53, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 2000=33.33%, >=2000=66.67% cpu : usr=0.02%, sys=1.04%, ctx=42, 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=143708: Mon Aug 10 20:10:29 2026 read: IOPS=0, BW=485KiB/s (497kB/s)(4096KiB/8441msec) clat (nsec): min=5126.8M, max=5126.8M, avg=5126760900.00, stdev= 0.00 lat (nsec): min=5126.8M, max=5126.8M, avg=5126763220.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 5134], 5.00th=[ 5134], 10.00th=[ 5134], 20.00th=[ 5134], | 30.00th=[ 5134], 40.00th=[ 5134], 50.00th=[ 5134], 60.00th=[ 5134], | 70.00th=[ 5134], 80.00th=[ 5134], 90.00th=[ 5134], 95.00th=[ 5134], | 99.00th=[ 5134], 99.50th=[ 5134], 99.90th=[ 5134], 99.95th=[ 5134], | 99.99th=[ 5134] 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 write: IOPS=0, BW=971KiB/s (994kB/s)(8192KiB/8441msec); 0 zone resets clat (msec): min=1520, max=1786, avg=1653.67, stdev=188.47 lat (msec): min=1521, max=1787, avg=1654.52, stdev=188.77 clat percentiles (msec): | 1.00th=[ 1519], 5.00th=[ 1519], 10.00th=[ 1519], 20.00th=[ 1519], | 30.00th=[ 1519], 40.00th=[ 1519], 50.00th=[ 1519], 60.00th=[ 1787], | 70.00th=[ 1787], 80.00th=[ 1787], 90.00th=[ 1787], 95.00th=[ 1787], | 99.00th=[ 1787], 99.50th=[ 1787], 99.90th=[ 1787], 99.95th=[ 1787], | 99.99th=[ 1787] bw ( KiB/s): min= 8078, max= 8078, per=100.00%, avg=8078.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 2000=66.67%, >=2000=33.33% cpu : usr=0.08%, sys=1.65%, ctx=69, 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=143709: Mon Aug 10 20:10:29 2026 write: IOPS=0, BW=1416KiB/s (1450kB/s)(12.0MiB/8676msec); 0 zone resets clat (msec): min=1621, max=4519, avg=2820.58, stdev=1512.36 lat (msec): min=1623, max=4521, avg=2821.87, stdev=1512.84 clat percentiles (msec): | 1.00th=[ 1620], 5.00th=[ 1620], 10.00th=[ 1620], 20.00th=[ 1620], | 30.00th=[ 1620], 40.00th=[ 2333], 50.00th=[ 2333], 60.00th=[ 2333], | 70.00th=[ 4530], 80.00th=[ 4530], 90.00th=[ 4530], 95.00th=[ 4530], | 99.00th=[ 4530], 99.50th=[ 4530], 99.90th=[ 4530], 99.95th=[ 4530], | 99.99th=[ 4530] bw ( KiB/s): min= 8159, max= 8175, per=100.00%, avg=8167.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 2000=33.33%, >=2000=66.67% cpu : usr=0.00%, sys=0.90%, ctx=42, 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=143710: Mon Aug 10 20:10:29 2026 write: IOPS=0, BW=1727KiB/s (1769kB/s)(12.0MiB/7115msec); 0 zone resets clat (msec): min=729, max=4461, avg=2306.41, stdev=1931.97 lat (msec): min=729, max=4473, avg=2313.09, stdev=1937.29 clat percentiles (msec): | 1.00th=[ 726], 5.00th=[ 726], 10.00th=[ 726], 20.00th=[ 726], | 30.00th=[ 726], 40.00th=[ 1737], 50.00th=[ 1737], 60.00th=[ 1737], | 70.00th=[ 4463], 80.00th=[ 4463], 90.00th=[ 4463], 95.00th=[ 4463], | 99.00th=[ 4463], 99.50th=[ 4463], 99.90th=[ 4463], 99.95th=[ 4463], | 99.99th=[ 4463] bw ( KiB/s): min= 8031, max= 8175, per=100.00%, avg=8103.00, stdev=101.82, 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=1.05%, ctx=63, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=1876KiB/s (1921kB/s), 485KiB/s-1407KiB/s (497kB/s-1441kB/s), io=16.0MiB (16.8MB), run=8441-8735msec WRITE: bw=3777KiB/s (3868kB/s), 971KiB/s-1727KiB/s (994kB/s-1769kB/s), io=32.0MiB (33.6MB), run=7115-8676msec