== sanity test 398b: DIO and buffer IO race ============== 10:06:33 (1787148393) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.05593 s, 10.0 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=179413: Wed Aug 19 10:08:41 2026 read: IOPS=13, BW=54.7KiB/s (55.0kB/s)(5992KiB/109583msec) clat (usec): min=36, max=895223, avg=40466.58, stdev=34834.57 lat (usec): min=37, max=895224, avg=40469.06, stdev=34834.40 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 9503], 10.00th=[ 15008], 20.00th=[ 19792], | 30.00th=[ 24511], 40.00th=[ 28705], 50.00th=[ 33817], 60.00th=[ 40109], | 70.00th=[ 46924], 80.00th=[ 57934], 90.00th=[ 72877], 95.00th=[ 88605], | 99.00th=[143655], 99.50th=[173016], 99.90th=[244319], 99.95th=[893387], | 99.99th=[893387] bw ( KiB/s): min= 15, max= 134, per=24.95%, avg=54.39, stdev=21.44, samples=215 iops : min= 3, max= 33, avg=12.94, stdev= 5.38, samples=215 write: IOPS=14, BW=57.5KiB/s (58.8kB/s)(6296KiB/109583msec); 0 zone resets clat (usec): min=757, max=252736, avg=30819.43, stdev=32033.27 lat (usec): min=759, max=252737, avg=30824.55, stdev=32035.55 clat percentiles (usec): | 1.00th=[ 1012], 5.00th=[ 1172], 10.00th=[ 1352], 20.00th=[ 2933], | 30.00th=[ 6718], 40.00th=[ 14877], 50.00th=[ 22414], 60.00th=[ 29754], | 70.00th=[ 40109], 80.00th=[ 53740], 90.00th=[ 72877], 95.00th=[ 91751], | 99.00th=[139461], 99.50th=[162530], 99.90th=[231736], 99.95th=[252707], | 99.99th=[252707] bw ( KiB/s): min= 7, max= 151, per=25.04%, avg=57.09, stdev=22.96, samples=215 iops : min= 1, max= 37, avg=13.63, stdev= 5.76, samples=215 lat (usec) : 50=0.39%, 100=1.53%, 250=0.13%, 500=0.07%, 1000=0.49% lat (msec) : 2=7.55%, 4=3.91%, 10=6.22%, 20=13.31%, 50=42.02% lat (msec) : 100=21.16%, 250=3.16%, 500=0.03%, 1000=0.03% cpu : usr=0.07%, sys=5.17%, ctx=6331, 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=179414: Wed Aug 19 10:08:41 2026 read: IOPS=13, BW=54.6KiB/s (55.9kB/s)(5940KiB/108815msec) clat (usec): min=39, max=816713, avg=41015.22, stdev=33306.01 lat (usec): min=40, max=816714, avg=41017.57, stdev=33305.92 clat percentiles (usec): | 1.00th=[ 54], 5.00th=[ 9503], 10.00th=[ 15270], 20.00th=[ 20317], | 30.00th=[ 24773], 40.00th=[ 29754], 50.00th=[ 35390], 60.00th=[ 41157], | 70.00th=[ 49021], 80.00th=[ 57934], 90.00th=[ 71828], 95.00th=[ 86508], | 99.00th=[147850], 99.50th=[164627], 99.90th=[225444], 99.95th=[817890], | 99.99th=[817890] bw ( KiB/s): min= 15, max= 119, per=24.93%, avg=54.35, stdev=17.98, samples=213 iops : min= 3, max= 29, avg=12.92, stdev= 4.49, samples=213 write: IOPS=14, BW=58.3KiB/s (59.7kB/s)(6348KiB/108815msec); 0 zone resets clat (usec): min=820, max=187253, avg=29931.51, stdev=31134.80 lat (usec): min=822, max=187254, avg=29939.79, stdev=31132.37 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1172], 10.00th=[ 1287], 20.00th=[ 2835], | 30.00th=[ 6128], 40.00th=[ 13042], 50.00th=[ 21890], 60.00th=[ 28705], | 70.00th=[ 39060], 80.00th=[ 52691], 90.00th=[ 73925], 95.00th=[ 92799], | 99.00th=[137364], 99.50th=[147850], 99.90th=[187696], 99.95th=[187696], | 99.99th=[187696] bw ( KiB/s): min= 8, max= 127, per=25.50%, avg=58.15, stdev=24.52, samples=212 iops : min= 2, max= 31, avg=13.90, stdev= 6.19, samples=212 lat (usec) : 50=0.29%, 100=1.69%, 250=0.07%, 500=0.03%, 750=0.03% lat (usec) : 1000=0.23% lat (msec) : 2=8.27%, 4=3.52%, 10=7.55%, 20=12.08%, 50=41.41% lat (msec) : 100=21.58%, 250=3.22%, 1000=0.03% cpu : usr=0.09%, sys=5.14%, ctx=6325, 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=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=179415: Wed Aug 19 10:08:41 2026 read: IOPS=13, BW=54.9KiB/s (56.2kB/s)(6028KiB/109887msec) clat (usec): min=30, max=823139, avg=39516.78, stdev=32462.01 lat (usec): min=31, max=823141, avg=39518.28, stdev=32462.04 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 91], 10.00th=[ 13566], 20.00th=[ 19530], | 30.00th=[ 24511], 40.00th=[ 28705], 50.00th=[ 33817], 60.00th=[ 39060], | 70.00th=[ 46924], 80.00th=[ 56886], 90.00th=[ 73925], 95.00th=[ 87557], | 99.00th=[115868], 99.50th=[135267], 99.90th=[196084], 99.95th=[826278], | 99.99th=[826278] bw ( KiB/s): min= 15, max= 143, per=25.07%, avg=54.66, stdev=22.12, samples=216 iops : min= 3, max= 35, avg=13.01, stdev= 5.55, samples=216 write: IOPS=14, BW=56.0KiB/s (58.3kB/s)(6260KiB/109887msec); 0 zone resets clat (usec): min=727, max=269117, avg=31898.48, stdev=33368.87 lat (usec): min=728, max=269118, avg=31906.41, stdev=33368.27 clat percentiles (usec): | 1.00th=[ 1012], 5.00th=[ 1188], 10.00th=[ 1336], 20.00th=[ 2966], | 30.00th=[ 6652], 40.00th=[ 15008], 50.00th=[ 23200], 60.00th=[ 31065], | 70.00th=[ 41157], 80.00th=[ 55313], 90.00th=[ 77071], 95.00th=[ 98042], | 99.00th=[141558], 99.50th=[160433], 99.90th=[252707], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 7, max= 174, per=24.87%, avg=56.71, stdev=24.01, samples=216 iops : min= 1, max= 43, avg=13.53, stdev= 6.01, samples=216 lat (usec) : 50=0.33%, 100=2.25%, 250=0.03%, 500=0.07%, 750=0.07% lat (usec) : 1000=0.29% lat (msec) : 2=7.49%, 4=4.10%, 10=6.58%, 20=12.53%, 50=41.08% lat (msec) : 100=21.81%, 250=3.29%, 500=0.07%, 1000=0.03% cpu : usr=0.08%, sys=5.22%, ctx=6243, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179416: Wed Aug 19 10:08:41 2026 read: IOPS=13, BW=55.3KiB/s (56.6kB/s)(6052KiB/109443msec) clat (usec): min=35, max=222925, avg=40431.88, stdev=26171.77 lat (usec): min=35, max=222926, avg=40434.55, stdev=26172.28 clat percentiles (usec): | 1.00th=[ 54], 5.00th=[ 9372], 10.00th=[ 15533], 20.00th=[ 20579], | 30.00th=[ 25035], 40.00th=[ 30016], 50.00th=[ 35390], 60.00th=[ 41157], | 70.00th=[ 47973], 80.00th=[ 57934], 90.00th=[ 72877], 95.00th=[ 87557], | 99.00th=[137364], 99.50th=[162530], 99.90th=[187696], 99.95th=[223347], | 99.99th=[223347] bw ( KiB/s): min= 7, max= 143, per=25.37%, avg=55.30, stdev=21.27, samples=214 iops : min= 1, max= 35, avg=13.18, stdev= 5.36, samples=214 write: IOPS=14, BW=56.0KiB/s (58.3kB/s)(6236KiB/109443msec); 0 zone resets clat (usec): min=753, max=868348, avg=30684.58, stdev=37925.46 lat (usec): min=753, max=868350, avg=30686.29, stdev=37925.90 clat percentiles (usec): | 1.00th=[ 1037], 5.00th=[ 1139], 10.00th=[ 1270], 20.00th=[ 2442], | 30.00th=[ 5604], 40.00th=[ 12387], 50.00th=[ 21365], 60.00th=[ 29230], | 70.00th=[ 39060], 80.00th=[ 54264], 90.00th=[ 73925], 95.00th=[ 93848], | 99.00th=[132645], 99.50th=[147850], 99.90th=[183501], 99.95th=[868221], | 99.99th=[868221] bw ( KiB/s): min= 7, max= 119, per=24.86%, avg=56.67, stdev=22.14, samples=215 iops : min= 1, max= 29, avg=13.52, stdev= 5.57, samples=215 lat (usec) : 50=0.29%, 100=1.69%, 250=0.03%, 500=0.03%, 750=0.03% lat (usec) : 1000=0.42% lat (msec) : 2=8.79%, 4=4.10%, 10=5.99%, 20=12.34%, 50=41.34% lat (msec) : 100=21.68%, 250=3.22%, 1000=0.03% cpu : usr=0.07%, sys=5.10%, ctx=6401, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=219KiB/s (224kB/s), 54.6KiB/s-55.3KiB/s (55.9kB/s-56.6kB/s), io=23.4MiB (24.6MB), run=108815-109887msec WRITE: bw=229KiB/s (234kB/s), 56.0KiB/s-58.3KiB/s (58.3kB/s-59.7kB/s), io=24.6MiB (25.7MB), run=108815-109887msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179418: Wed Aug 19 10:09:15 2026 read: IOPS=10, BW=41.7KiB/s (42.7kB/s)(5992KiB/143641msec) clat (msec): min=4, max=855, avg=37.74, stdev=41.14 lat (msec): min=4, max=855, avg=37.74, stdev=41.14 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 31], | 70.00th=[ 39], 80.00th=[ 54], 90.00th=[ 83], 95.00th=[ 111], | 99.00th=[ 169], 99.50th=[ 205], 99.90th=[ 317], 99.95th=[ 852], | 99.99th=[ 852] bw ( KiB/s): min= 7, max= 135, per=25.32%, avg=42.28, stdev=29.01, samples=276 iops : min= 1, max= 33, avg= 9.91, stdev= 7.30, samples=276 write: IOPS=10, BW=43.8KiB/s (44.9kB/s)(6296KiB/143641msec); 0 zone resets clat (msec): min=11, max=417, avg=55.25, stdev=40.60 lat (msec): min=11, max=417, avg=55.26, stdev=40.60 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 25], | 30.00th=[ 30], 40.00th=[ 35], 50.00th=[ 41], 60.00th=[ 51], | 70.00th=[ 64], 80.00th=[ 80], 90.00th=[ 109], 95.00th=[ 136], | 99.00th=[ 197], 99.50th=[ 228], 99.90th=[ 292], 99.95th=[ 418], | 99.99th=[ 418] bw ( KiB/s): min= 7, max= 134, per=24.74%, avg=43.30, stdev=27.64, samples=283 iops : min= 1, max= 33, avg=10.17, stdev= 6.95, samples=283 lat (msec) : 10=4.00%, 20=19.82%, 50=44.76%, 100=21.48%, 250=9.73% lat (msec) : 500=0.16%, 1000=0.03% cpu : usr=0.06%, sys=1.79%, ctx=4721, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179419: Wed Aug 19 10:09:15 2026 read: IOPS=10, BW=41.5KiB/s (42.5kB/s)(5940KiB/143212msec) clat (msec): min=4, max=949, avg=37.78, stdev=43.11 lat (msec): min=4, max=949, avg=37.78, stdev=43.11 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 30], | 70.00th=[ 39], 80.00th=[ 55], 90.00th=[ 86], 95.00th=[ 114], | 99.00th=[ 180], 99.50th=[ 203], 99.90th=[ 326], 99.95th=[ 953], | 99.99th=[ 953] bw ( KiB/s): min= 7, max= 175, per=24.87%, avg=41.53, stdev=29.40, samples=279 iops : min= 1, max= 43, avg= 9.73, stdev= 7.40, samples=279 write: IOPS=11, BW=44.3KiB/s (45.4kB/s)(6348KiB/143212msec); 0 zone resets clat (msec): min=9, max=291, avg=54.80, stdev=37.97 lat (msec): min=9, max=291, avg=54.80, stdev=37.97 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 26], | 30.00th=[ 31], 40.00th=[ 36], 50.00th=[ 43], 60.00th=[ 52], | 70.00th=[ 65], 80.00th=[ 81], 90.00th=[ 108], 95.00th=[ 131], | 99.00th=[ 188], 99.50th=[ 203], 99.90th=[ 275], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 7, max= 119, per=25.11%, avg=43.95, stdev=26.92, samples=281 iops : min= 1, max= 29, avg=10.34, stdev= 6.77, samples=281 lat (msec) : 10=4.10%, 20=20.21%, 50=43.75%, 100=22.40%, 250=9.34% lat (msec) : 500=0.16%, 1000=0.03% cpu : usr=0.06%, sys=1.75%, ctx=4608, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179420: Wed Aug 19 10:09:15 2026 read: IOPS=10, BW=42.1KiB/s (43.1kB/s)(6028KiB/143282msec) clat (msec): min=4, max=318, avg=37.57, stdev=36.56 lat (msec): min=4, max=318, avg=37.58, stdev=36.56 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 30], | 70.00th=[ 39], 80.00th=[ 54], 90.00th=[ 86], 95.00th=[ 114], | 99.00th=[ 167], 99.50th=[ 211], 99.90th=[ 300], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 7, max= 164, per=25.28%, avg=42.22, stdev=28.53, samples=278 iops : min= 1, max= 41, avg= 9.91, stdev= 7.19, samples=278 write: IOPS=10, BW=43.7KiB/s (44.7kB/s)(6260KiB/143282msec); 0 zone resets clat (msec): min=9, max=937, avg=55.28, stdev=44.65 lat (msec): min=9, max=937, avg=55.28, stdev=44.65 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 26], | 30.00th=[ 31], 40.00th=[ 35], 50.00th=[ 41], 60.00th=[ 52], | 70.00th=[ 65], 80.00th=[ 80], 90.00th=[ 108], 95.00th=[ 134], | 99.00th=[ 194], 99.50th=[ 220], 99.90th=[ 296], 99.95th=[ 936], | 99.99th=[ 936] bw ( KiB/s): min= 7, max= 160, per=24.96%, avg=43.67, stdev=27.72, samples=279 iops : min= 1, max= 40, avg=10.26, stdev= 6.97, samples=279 lat (msec) : 10=4.10%, 20=19.66%, 50=44.89%, 100=22.01%, 250=9.08% lat (msec) : 500=0.23%, 1000=0.03% cpu : usr=0.05%, sys=1.75%, ctx=4567, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179422: Wed Aug 19 10:09:15 2026 read: IOPS=10, BW=42.4KiB/s (43.4kB/s)(6052KiB/142654msec) clat (msec): min=4, max=327, avg=38.02, stdev=36.14 lat (msec): min=4, max=327, avg=38.02, stdev=36.14 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 32], | 70.00th=[ 42], 80.00th=[ 54], 90.00th=[ 81], 95.00th=[ 113], | 99.00th=[ 188], 99.50th=[ 203], 99.90th=[ 305], 99.95th=[ 326], | 99.99th=[ 326] bw ( KiB/s): min= 7, max= 160, per=25.63%, avg=42.81, stdev=28.05, samples=276 iops : min= 1, max= 40, avg=10.04, stdev= 7.04, samples=276 write: IOPS=10, BW=43.7KiB/s (44.8kB/s)(6236KiB/142654msec); 0 zone resets clat (msec): min=7, max=949, avg=54.51, stdev=43.88 lat (msec): min=7, max=949, avg=54.51, stdev=43.88 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 26], | 30.00th=[ 31], 40.00th=[ 35], 50.00th=[ 42], 60.00th=[ 52], | 70.00th=[ 63], 80.00th=[ 80], 90.00th=[ 106], 95.00th=[ 129], | 99.00th=[ 178], 99.50th=[ 213], 99.90th=[ 426], 99.95th=[ 953], | 99.99th=[ 953] bw ( KiB/s): min= 7, max= 134, per=24.91%, avg=43.58, stdev=26.96, samples=279 iops : min= 1, max= 33, avg=10.24, stdev= 6.78, samples=279 lat (msec) : 10=3.97%, 20=19.04%, 50=45.08%, 100=23.05%, 250=8.53% lat (msec) : 500=0.29%, 1000=0.03% cpu : usr=0.06%, sys=1.71%, ctx=4657, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=167KiB/s (171kB/s), 41.5KiB/s-42.4KiB/s (42.5kB/s-43.4kB/s), io=23.4MiB (24.6MB), run=142654-143641msec WRITE: bw=175KiB/s (179kB/s), 43.7KiB/s-44.3KiB/s (44.7kB/s-45.4kB/s), io=24.6MiB (25.7MB), run=142654-143641msec 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=179461: Wed Aug 19 10:09:55 2026 read: IOPS=12, BW=202KiB/s (207kB/s)(5920KiB/29322msec) clat (usec): min=51, max=219585, avg=44334.39, stdev=30154.40 lat (usec): min=52, max=219586, avg=44335.94, stdev=30154.21 clat percentiles (usec): | 1.00th=[ 54], 5.00th=[ 65], 10.00th=[ 15139], 20.00th=[ 22414], | 30.00th=[ 27657], 40.00th=[ 33817], 50.00th=[ 38536], 60.00th=[ 46924], | 70.00th=[ 53740], 80.00th=[ 64226], 90.00th=[ 78119], 95.00th=[ 94897], | 99.00th=[166724], 99.50th=[208667], 99.90th=[219153], 99.95th=[219153], | 99.99th=[219153] bw ( KiB/s): min= 31, max= 380, per=25.21%, avg=198.88, stdev=78.74, samples=57 iops : min= 1, max= 23, avg=11.67, stdev= 5.00, samples=57 write: IOPS=13, BW=217KiB/s (222kB/s)(6368KiB/29322msec); 0 zone resets clat (usec): min=1239, max=186432, avg=31915.87, stdev=30321.62 lat (usec): min=1240, max=186434, avg=31918.01, stdev=30321.60 clat percentiles (usec): | 1.00th=[ 1467], 5.00th=[ 1778], 10.00th=[ 2245], 20.00th=[ 4555], | 30.00th=[ 9372], 40.00th=[ 15533], 50.00th=[ 22676], 60.00th=[ 32900], | 70.00th=[ 42206], 80.00th=[ 55313], 90.00th=[ 72877], 95.00th=[ 88605], | 99.00th=[130548], 99.50th=[132645], 99.90th=[185598], 99.95th=[185598], | 99.99th=[185598] bw ( KiB/s): min= 31, max= 380, per=26.10%, avg=216.67, stdev=84.32, samples=57 iops : min= 1, max= 23, avg=12.77, stdev= 5.31, samples=57 lat (usec) : 100=3.12%, 500=0.13%, 750=0.13% lat (msec) : 2=4.69%, 4=4.82%, 10=6.64%, 20=10.55%, 50=40.89% lat (msec) : 100=25.13%, 250=3.91% cpu : usr=0.10%, sys=5.33%, ctx=1681, 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=179463: Wed Aug 19 10:09:55 2026 read: IOPS=12, BW=194KiB/s (199kB/s)(5744KiB/29584msec) clat (usec): min=48, max=167754, avg=44098.24, stdev=26813.44 lat (usec): min=48, max=167756, avg=44099.57, stdev=26813.44 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 74], 10.00th=[ 15139], 20.00th=[ 23462], | 30.00th=[ 29230], 40.00th=[ 33817], 50.00th=[ 40109], 60.00th=[ 45876], | 70.00th=[ 52691], 80.00th=[ 62653], 90.00th=[ 78119], 95.00th=[ 94897], | 99.00th=[130548], 99.50th=[147850], 99.90th=[166724], 99.95th=[166724], | 99.99th=[166724] bw ( KiB/s): min= 60, max= 375, per=24.50%, avg=193.33, stdev=79.14, samples=58 iops : min= 3, max= 23, avg=11.31, stdev= 5.01, samples=58 write: IOPS=13, BW=221KiB/s (227kB/s)(6544KiB/29584msec); 0 zone resets clat (usec): min=1426, max=235992, avg=33102.83, stdev=32696.52 lat (usec): min=1428, max=235994, avg=33106.24, stdev=32696.66 clat percentiles (usec): | 1.00th=[ 1549], 5.00th=[ 1795], 10.00th=[ 2835], 20.00th=[ 5932], | 30.00th=[ 10159], 40.00th=[ 17171], 50.00th=[ 23725], 60.00th=[ 31851], | 70.00th=[ 40633], 80.00th=[ 56886], 90.00th=[ 72877], 95.00th=[ 98042], | 99.00th=[143655], 99.50th=[156238], 99.90th=[235930], 99.95th=[235930], | 99.99th=[235930] bw ( KiB/s): min= 63, max= 508, per=26.50%, avg=219.95, stdev=104.69, samples=58 iops : min= 3, max= 31, avg=13.00, stdev= 6.67, samples=58 lat (usec) : 50=0.26%, 100=2.60%, 250=0.13%, 750=0.13% lat (msec) : 2=3.39%, 4=4.17%, 10=8.20%, 20=10.16%, 50=42.58% lat (msec) : 100=24.22%, 250=4.17% cpu : usr=0.07%, sys=5.58%, ctx=1654, 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=179464: Wed Aug 19 10:09:55 2026 read: IOPS=12, BW=206KiB/s (211kB/s)(6256KiB/30338msec) clat (usec): min=38, max=269064, avg=42728.29, stdev=27882.16 lat (usec): min=38, max=269065, avg=42733.72, stdev=27884.86 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 64], 10.00th=[ 16319], 20.00th=[ 23725], | 30.00th=[ 27657], 40.00th=[ 33817], 50.00th=[ 38536], 60.00th=[ 44827], | 70.00th=[ 51119], 80.00th=[ 60556], 90.00th=[ 76022], 95.00th=[ 87557], | 99.00th=[126354], 99.50th=[149947], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 31, max= 415, per=25.80%, avg=203.59, stdev=73.57, samples=59 iops : min= 1, max= 25, avg=11.97, stdev= 4.68, samples=59 write: IOPS=12, BW=199KiB/s (204kB/s)(6032KiB/30338msec); 0 zone resets clat (usec): min=1397, max=225796, avg=35826.57, stdev=33734.59 lat (usec): min=1399, max=225799, avg=35829.67, stdev=33734.56 clat percentiles (usec): | 1.00th=[ 1614], 5.00th=[ 1811], 10.00th=[ 3064], 20.00th=[ 5080], | 30.00th=[ 10159], 40.00th=[ 19530], 50.00th=[ 27657], 60.00th=[ 35390], | 70.00th=[ 46400], 80.00th=[ 59507], 90.00th=[ 85459], 95.00th=[ 99091], | 99.00th=[145753], 99.50th=[164627], 99.90th=[225444], 99.95th=[225444], | 99.99th=[225444] bw ( KiB/s): min= 31, max= 380, per=23.08%, avg=191.59, stdev=77.08, samples=59 iops : min= 1, max= 23, avg=11.20, stdev= 4.85, samples=59 lat (usec) : 50=0.39%, 100=3.39%, 250=0.13%, 1000=0.26% lat (msec) : 2=2.99%, 4=3.39%, 10=8.46%, 20=8.72%, 50=42.45% lat (msec) : 100=26.17%, 250=3.52%, 500=0.13% cpu : usr=0.06%, sys=4.96%, ctx=1641, 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=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=179465: Wed Aug 19 10:09:55 2026 read: IOPS=13, BW=208KiB/s (213kB/s)(6032KiB/28998msec) clat (usec): min=45, max=229639, avg=42772.88, stdev=31131.08 lat (usec): min=46, max=229640, avg=42774.15, stdev=31131.04 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 60], 10.00th=[ 83], 20.00th=[ 20841], | 30.00th=[ 26608], 40.00th=[ 32637], 50.00th=[ 38011], 60.00th=[ 43779], | 70.00th=[ 51119], 80.00th=[ 62129], 90.00th=[ 78119], 95.00th=[100140], | 99.00th=[147850], 99.50th=[173016], 99.90th=[229639], 99.95th=[229639], | 99.99th=[229639] bw ( KiB/s): min= 94, max= 478, per=26.07%, avg=205.67, stdev=74.47, samples=57 iops : min= 5, max= 29, avg=12.09, stdev= 4.73, samples=57 write: IOPS=13, BW=216KiB/s (221kB/s)(6256KiB/28998msec); 0 zone resets clat (usec): min=1359, max=177367, avg=32299.38, stdev=30741.09 lat (usec): min=1362, max=177368, avg=32301.84, stdev=30741.86 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1762], 10.00th=[ 2311], 20.00th=[ 5473], | 30.00th=[ 9765], 40.00th=[ 16188], 50.00th=[ 23462], 60.00th=[ 31851], | 70.00th=[ 42206], 80.00th=[ 55313], 90.00th=[ 77071], 95.00th=[ 92799], | 99.00th=[143655], 99.50th=[166724], 99.90th=[177210], 99.95th=[177210], | 99.99th=[177210] bw ( KiB/s): min= 31, max= 541, per=25.92%, avg=215.18, stdev=93.85, samples=57 iops : min= 1, max= 33, avg=12.68, stdev= 5.94, samples=57 lat (usec) : 50=0.39%, 100=4.69%, 250=0.13%, 500=0.26% lat (msec) : 2=4.30%, 4=4.04%, 10=7.68%, 20=11.07%, 50=39.45% lat (msec) : 100=23.70%, 250=4.30% cpu : usr=0.06%, sys=5.09%, ctx=1632, 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=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=790KiB/s (808kB/s), 194KiB/s-208KiB/s (199kB/s-213kB/s), io=23.4MiB (24.5MB), run=28998-30338msec WRITE: bw=831KiB/s (851kB/s), 199KiB/s-221KiB/s (204kB/s-227kB/s), io=24.6MiB (25.8MB), run=28998-30338msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179458: Wed Aug 19 10:10:06 2026 read: IOPS=9, BW=144KiB/s (148kB/s)(5920KiB/41000msec) clat (msec): min=6, max=243, avg=43.91, stdev=36.43 lat (msec): min=6, max=243, avg=43.92, stdev=36.43 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 19], | 30.00th=[ 23], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 38], | 70.00th=[ 48], 80.00th=[ 64], 90.00th=[ 91], 95.00th=[ 116], | 99.00th=[ 197], 99.50th=[ 230], 99.90th=[ 245], 99.95th=[ 245], | 99.99th=[ 245] bw ( KiB/s): min= 31, max= 384, per=24.89%, avg=143.85, stdev=87.79, samples=81 iops : min= 1, max= 24, avg= 8.17, stdev= 5.61, samples=81 write: IOPS=9, BW=155KiB/s (159kB/s)(6368KiB/41000msec); 0 zone resets clat (msec): min=12, max=268, avg=61.63, stdev=39.21 lat (msec): min=12, max=268, avg=61.63, stdev=39.21 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 22], 10.00th=[ 26], 20.00th=[ 32], | 30.00th=[ 36], 40.00th=[ 43], 50.00th=[ 49], 60.00th=[ 58], | 70.00th=[ 71], 80.00th=[ 91], 90.00th=[ 114], 95.00th=[ 133], | 99.00th=[ 197], 99.50th=[ 241], 99.90th=[ 268], 99.95th=[ 268], | 99.99th=[ 268] bw ( KiB/s): min= 30, max= 380, per=25.43%, avg=154.89, stdev=80.95, samples=81 iops : min= 1, max= 23, avg= 8.86, stdev= 5.11, samples=81 lat (msec) : 10=0.91%, 20=13.15%, 50=47.40%, 100=25.52%, 250=12.89% lat (msec) : 500=0.13% cpu : usr=0.04%, sys=1.76%, ctx=1241, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179459: Wed Aug 19 10:10:06 2026 read: IOPS=8, BW=140KiB/s (144kB/s)(5744KiB/40972msec) clat (msec): min=7, max=190, avg=43.60, stdev=35.42 lat (msec): min=7, max=190, avg=43.61, stdev=35.42 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 27], 50.00th=[ 31], 60.00th=[ 37], | 70.00th=[ 47], 80.00th=[ 64], 90.00th=[ 95], 95.00th=[ 124], | 99.00th=[ 176], 99.50th=[ 182], 99.90th=[ 190], 99.95th=[ 190], | 99.99th=[ 190] bw ( KiB/s): min= 30, max= 412, per=24.83%, avg=143.54, stdev=83.48, samples=79 iops : min= 1, max= 25, avg= 8.15, stdev= 5.30, samples=79 write: IOPS=9, BW=160KiB/s (164kB/s)(6544KiB/40972msec); 0 zone resets clat (msec): min=13, max=233, avg=61.63, stdev=37.81 lat (msec): min=13, max=233, avg=61.63, stdev=37.81 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 23], 10.00th=[ 27], 20.00th=[ 32], | 30.00th=[ 38], 40.00th=[ 44], 50.00th=[ 52], 60.00th=[ 59], | 70.00th=[ 70], 80.00th=[ 87], 90.00th=[ 115], 95.00th=[ 138], | 99.00th=[ 199], 99.50th=[ 211], 99.90th=[ 234], 99.95th=[ 234], | 99.99th=[ 234] bw ( KiB/s): min= 31, max= 413, per=26.13%, avg=159.16, stdev=81.19, samples=81 iops : min= 1, max= 25, avg= 9.14, stdev= 5.16, samples=81 lat (msec) : 10=0.52%, 20=11.98%, 50=47.27%, 100=28.65%, 250=11.59% cpu : usr=0.06%, sys=1.77%, ctx=1130, 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=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=179460: Wed Aug 19 10:10:06 2026 read: IOPS=9, BW=151KiB/s (155kB/s)(6256KiB/41377msec) clat (msec): min=6, max=243, avg=43.60, stdev=38.78 lat (msec): min=6, max=243, avg=43.60, stdev=38.78 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 27], 50.00th=[ 31], 60.00th=[ 36], | 70.00th=[ 45], 80.00th=[ 59], 90.00th=[ 93], 95.00th=[ 124], | 99.00th=[ 197], 99.50th=[ 230], 99.90th=[ 243], 99.95th=[ 243], | 99.99th=[ 243] bw ( KiB/s): min= 31, max= 414, per=26.42%, avg=152.70, stdev=93.30, samples=79 iops : min= 1, max= 25, avg= 8.73, stdev= 5.86, samples=79 write: IOPS=9, BW=146KiB/s (149kB/s)(6032KiB/41377msec); 0 zone resets clat (msec): min=16, max=315, avg=64.07, stdev=38.90 lat (msec): min=16, max=315, avg=64.07, stdev=38.90 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 24], 10.00th=[ 28], 20.00th=[ 33], | 30.00th=[ 39], 40.00th=[ 45], 50.00th=[ 54], 60.00th=[ 65], | 70.00th=[ 77], 80.00th=[ 91], 90.00th=[ 111], 95.00th=[ 142], | 99.00th=[ 188], 99.50th=[ 239], 99.90th=[ 317], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 31, max= 318, per=23.31%, avg=141.98, stdev=71.15, samples=81 iops : min= 1, max= 19, avg= 8.05, stdev= 4.53, samples=81 lat (msec) : 10=1.17%, 20=14.06%, 50=45.31%, 100=28.13%, 250=11.20% lat (msec) : 500=0.13% cpu : usr=0.05%, sys=1.78%, ctx=1184, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179462: Wed Aug 19 10:10:06 2026 read: IOPS=9, BW=149KiB/s (152kB/s)(6032KiB/40596msec) clat (msec): min=6, max=213, avg=42.11, stdev=34.35 lat (msec): min=6, max=213, avg=42.11, stdev=34.35 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 19], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 30], 60.00th=[ 35], | 70.00th=[ 44], 80.00th=[ 62], 90.00th=[ 92], 95.00th=[ 117], | 99.00th=[ 174], 99.50th=[ 207], 99.90th=[ 215], 99.95th=[ 215], | 99.99th=[ 215] bw ( KiB/s): min= 31, max= 412, per=26.13%, avg=151.05, stdev=84.45, samples=78 iops : min= 1, max= 25, avg= 8.62, stdev= 5.30, samples=78 write: IOPS=9, BW=154KiB/s (158kB/s)(6256KiB/40596msec); 0 zone resets clat (msec): min=9, max=316, avg=62.38, stdev=41.74 lat (msec): min=9, max=316, avg=62.38, stdev=41.74 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 23], 10.00th=[ 26], 20.00th=[ 29], | 30.00th=[ 36], 40.00th=[ 42], 50.00th=[ 50], 60.00th=[ 58], | 70.00th=[ 73], 80.00th=[ 91], 90.00th=[ 113], 95.00th=[ 150], | 99.00th=[ 222], 99.50th=[ 271], 99.90th=[ 317], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 31, max= 410, per=25.27%, avg=153.91, stdev=82.96, samples=80 iops : min= 1, max= 25, avg= 8.80, stdev= 5.28, samples=80 lat (msec) : 10=1.17%, 20=11.98%, 50=49.48%, 100=25.65%, 250=11.46% lat (msec) : 500=0.26% cpu : usr=0.05%, sys=1.68%, ctx=1151, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=579KiB/s (593kB/s), 140KiB/s-151KiB/s (144kB/s-155kB/s), io=23.4MiB (24.5MB), run=40596-41377msec WRITE: bw=609KiB/s (624kB/s), 146KiB/s-160KiB/s (149kB/s-164kB/s), io=24.6MiB (25.8MB), run=40596-41377msec 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=179476: Wed Aug 19 10:10:17 2026 read: IOPS=3, BW=3471KiB/s (3554kB/s)(7168KiB/2065msec) clat (msec): min=57, max=189, avg=146.23, stdev=46.73 lat (msec): min=57, max=189, avg=146.23, stdev=46.73 clat percentiles (msec): | 1.00th=[ 58], 5.00th=[ 58], 10.00th=[ 58], 20.00th=[ 116], | 30.00th=[ 140], 40.00th=[ 140], 50.00th=[ 165], 60.00th=[ 178], | 70.00th=[ 178], 80.00th=[ 180], 90.00th=[ 190], 95.00th=[ 190], | 99.00th=[ 190], 99.50th=[ 190], 99.90th=[ 190], 99.95th=[ 190], | 99.99th=[ 190] bw ( KiB/s): min= 1996, max= 4000, per=32.51%, avg=3224.00, stdev=1075.75, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=2, BW=2479KiB/s (2539kB/s)(5120KiB/2065msec); 0 zone resets clat (msec): min=86, max=261, avg=159.94, stdev=65.67 lat (msec): min=86, max=261, avg=160.03, stdev=65.67 clat percentiles (msec): | 1.00th=[ 87], 5.00th=[ 87], 10.00th=[ 87], 20.00th=[ 87], | 30.00th=[ 130], 40.00th=[ 130], 50.00th=[ 142], 60.00th=[ 142], | 70.00th=[ 180], 80.00th=[ 180], 90.00th=[ 262], 95.00th=[ 262], | 99.00th=[ 262], 99.50th=[ 262], 99.90th=[ 262], 99.95th=[ 262], | 99.99th=[ 262] bw ( KiB/s): min= 1996, max= 2000, per=14.39%, avg=1998.00, stdev= 2.83, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 100=16.67%, 250=75.00%, 500=8.33% cpu : usr=0.00%, sys=5.04%, ctx=52, 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=179477: Wed Aug 19 10:10:17 2026 read: IOPS=0, BW=1008KiB/s (1033kB/s)(2048KiB/2031msec) clat (msec): min=197, max=202, avg=200.20, stdev= 3.27 lat (msec): min=197, max=202, avg=200.20, stdev= 3.27 clat percentiles (msec): | 1.00th=[ 199], 5.00th=[ 199], 10.00th=[ 199], 20.00th=[ 199], | 30.00th=[ 199], 40.00th=[ 199], 50.00th=[ 199], 60.00th=[ 203], | 70.00th=[ 203], 80.00th=[ 203], 90.00th=[ 203], 95.00th=[ 203], | 99.00th=[ 203], 99.50th=[ 203], 99.90th=[ 203], 99.95th=[ 203], | 99.99th=[ 203] bw ( KiB/s): min= 1861, max= 1996, per=19.45%, avg=1928.50, stdev=95.46, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=4, BW=5042KiB/s (5163kB/s)(10.0MiB/2031msec); 0 zone resets clat (msec): min=89, max=218, avg=146.64, stdev=39.38 lat (msec): min=89, max=218, avg=147.15, stdev=40.15 clat percentiles (msec): | 1.00th=[ 90], 5.00th=[ 90], 10.00th=[ 90], 20.00th=[ 125], | 30.00th=[ 128], 40.00th=[ 129], 50.00th=[ 130], 60.00th=[ 140], | 70.00th=[ 146], 80.00th=[ 157], 90.00th=[ 209], 95.00th=[ 220], | 99.00th=[ 220], 99.50th=[ 220], 99.90th=[ 220], 99.95th=[ 220], | 99.99th=[ 220] bw ( KiB/s): min= 1861, max= 6000, per=28.46%, avg=3951.00, stdev=2069.80, samples=3 iops : min= 1, max= 5, avg= 3.00, stdev= 2.00, samples=3 lat (msec) : 100=8.33%, 250=91.67% cpu : usr=0.00%, sys=4.83%, ctx=52, 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=179478: Wed Aug 19 10:10:17 2026 read: IOPS=3, BW=3157KiB/s (3233kB/s)(6144KiB/1946msec) clat (msec): min=90, max=246, avg=155.23, stdev=53.37 lat (msec): min=90, max=246, avg=155.23, stdev=53.37 clat percentiles (msec): | 1.00th=[ 91], 5.00th=[ 91], 10.00th=[ 91], 20.00th=[ 124], | 30.00th=[ 124], 40.00th=[ 136], 50.00th=[ 136], 60.00th=[ 163], | 70.00th=[ 174], 80.00th=[ 174], 90.00th=[ 247], 95.00th=[ 247], | 99.00th=[ 247], 99.50th=[ 247], 99.90th=[ 247], 99.95th=[ 247], | 99.99th=[ 247] bw ( KiB/s): min= 3992, max= 4000, per=40.29%, avg=3996.00, stdev= 5.66, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=3, BW=3157KiB/s (3233kB/s)(6144KiB/1946msec); 0 zone resets clat (msec): min=71, max=246, avg=150.48, stdev=61.71 lat (msec): min=71, max=246, avg=150.82, stdev=61.60 clat percentiles (msec): | 1.00th=[ 72], 5.00th=[ 72], 10.00th=[ 72], 20.00th=[ 104], | 30.00th=[ 104], 40.00th=[ 134], 50.00th=[ 134], 60.00th=[ 171], | 70.00th=[ 178], 80.00th=[ 178], 90.00th=[ 247], 95.00th=[ 247], | 99.00th=[ 247], 99.50th=[ 247], 99.90th=[ 247], 99.95th=[ 247], | 99.99th=[ 247] bw ( KiB/s): min= 1996, max= 3900, per=18.96%, avg=2632.00, stdev=1098.12, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 100=16.67%, 250=83.33% cpu : usr=0.05%, sys=5.19%, ctx=52, 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=179479: Wed Aug 19 10:10:17 2026 read: IOPS=3, BW=3079KiB/s (3153kB/s)(5120KiB/1663msec) clat (msec): min=89, max=142, avg=122.27, stdev=21.81 lat (msec): min=89, max=142, avg=122.27, stdev=21.81 clat percentiles (msec): | 1.00th=[ 89], 5.00th=[ 89], 10.00th=[ 89], 20.00th=[ 89], | 30.00th=[ 112], 40.00th=[ 112], 50.00th=[ 133], 60.00th=[ 133], | 70.00th=[ 136], 80.00th=[ 136], 90.00th=[ 142], 95.00th=[ 142], | 99.00th=[ 142], 99.50th=[ 142], 99.90th=[ 142], 99.95th=[ 142], | 99.99th=[ 142] bw ( KiB/s): min= 8000, max= 8000, per=80.67%, avg=8000.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=4, BW=4310KiB/s (4414kB/s)(7168KiB/1663msec); 0 zone resets clat (msec): min=70, max=262, avg=147.81, stdev=64.64 lat (msec): min=70, max=262, avg=147.92, stdev=64.61 clat percentiles (msec): | 1.00th=[ 70], 5.00th=[ 70], 10.00th=[ 70], 20.00th=[ 79], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 153], 60.00th=[ 163], | 70.00th=[ 163], 80.00th=[ 171], 90.00th=[ 264], 95.00th=[ 264], | 99.00th=[ 264], 99.50th=[ 264], 99.90th=[ 264], 99.95th=[ 264], | 99.99th=[ 264] bw ( KiB/s): min= 3992, max= 7876, per=42.74%, avg=5934.00, stdev=2746.40, samples=2 iops : min= 3, max= 7, avg= 5.00, stdev= 2.83, samples=2 lat (msec) : 100=25.00%, 250=66.67%, 500=8.33% cpu : usr=0.00%, sys=4.93%, ctx=38, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=9918KiB/s (10.2MB/s), 1008KiB/s-3471KiB/s (1033kB/s-3554kB/s), io=20.0MiB (20.0MB), run=1663-2065msec WRITE: bw=13.6MiB/s (14.2MB/s), 2479KiB/s-5042KiB/s (2539kB/s-5163kB/s), io=28.0MiB (29.4MB), run=1663-2065msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179482: Wed Aug 19 10:10:20 2026 read: IOPS=3, BW=3396KiB/s (3477kB/s)(7168KiB/2111msec) clat (usec): min=746, max=273225, avg=145852.82, stdev=106144.16 lat (usec): min=747, max=273226, avg=145854.17, stdev=106144.37 clat percentiles (usec): | 1.00th=[ 750], 5.00th=[ 750], 10.00th=[ 750], 20.00th=[ 881], | 30.00th=[168821], 40.00th=[168821], 50.00th=[170918], 60.00th=[175113], | 70.00th=[175113], 80.00th=[231736], 90.00th=[274727], 95.00th=[274727], | 99.00th=[274727], 99.50th=[274727], 99.90th=[274727], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 2043, max= 4564, per=34.11%, avg=2885.00, stdev=1454.06, samples=3 iops : min= 1, max= 4, avg= 2.33, stdev= 1.53, samples=3 write: IOPS=2, BW=2425KiB/s (2484kB/s)(5120KiB/2111msec); 0 zone resets clat (msec): min=111, max=261, avg=208.25, stdev=60.98 lat (msec): min=111, max=261, avg=208.32, stdev=61.00 clat percentiles (msec): | 1.00th=[ 111], 5.00th=[ 111], 10.00th=[ 111], 20.00th=[ 111], | 30.00th=[ 194], 40.00th=[ 194], 50.00th=[ 220], 60.00th=[ 220], | 70.00th=[ 257], 80.00th=[ 257], 90.00th=[ 262], 95.00th=[ 262], | 99.00th=[ 262], 99.50th=[ 262], 99.90th=[ 262], 99.95th=[ 262], | 99.99th=[ 262] bw ( KiB/s): min= 2043, max= 2048, per=17.27%, avg=2045.50, stdev= 3.54, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (usec) : 750=8.33%, 1000=8.33% lat (msec) : 250=58.33%, 500=25.00% cpu : usr=0.00%, sys=19.81%, ctx=166, 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=179483: Wed Aug 19 10:10:20 2026 read: IOPS=0, BW=846KiB/s (866kB/s)(2048KiB/2421msec) clat (usec): min=821, max=254215, avg=127518.81, stdev=179176.56 lat (usec): min=822, max=254218, avg=127520.69, stdev=179177.72 clat percentiles (usec): | 1.00th=[ 824], 5.00th=[ 824], 10.00th=[ 824], 20.00th=[ 824], | 30.00th=[ 824], 40.00th=[ 824], 50.00th=[ 824], 60.00th=[254804], | 70.00th=[254804], 80.00th=[254804], 90.00th=[254804], 95.00th=[254804], | 99.00th=[254804], 99.50th=[254804], 99.90th=[254804], 99.95th=[254804], | 99.99th=[254804] bw ( KiB/s): min= 1595, max= 2043, per=21.50%, avg=1819.00, stdev=316.78, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=4, BW=4230KiB/s (4331kB/s)(10.0MiB/2421msec); 0 zone resets clat (msec): min=42, max=779, avg=206.96, stdev=222.70 lat (msec): min=42, max=779, avg=207.23, stdev=222.64 clat percentiles (msec): | 1.00th=[ 43], 5.00th=[ 43], 10.00th=[ 43], 20.00th=[ 49], | 30.00th=[ 57], 40.00th=[ 89], 50.00th=[ 118], 60.00th=[ 144], | 70.00th=[ 220], 80.00th=[ 236], 90.00th=[ 338], 95.00th=[ 776], | 99.00th=[ 776], 99.50th=[ 776], 99.90th=[ 776], 99.95th=[ 776], | 99.99th=[ 776] bw ( KiB/s): min= 2043, max= 6131, per=34.54%, avg=4090.00, stdev=2044.01, samples=3 iops : min= 1, max= 5, avg= 3.33, stdev= 2.08, samples=3 lat (usec) : 1000=8.33% lat (msec) : 50=16.67%, 100=16.67%, 250=33.33%, 500=16.67%, 1000=8.33% cpu : usr=0.00%, sys=20.12%, ctx=113, 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=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=179484: Wed Aug 19 10:10:20 2026 read: IOPS=2, BW=2811KiB/s (2878kB/s)(6144KiB/2186msec) clat (usec): min=428, max=183189, avg=42181.97, stdev=74105.15 lat (usec): min=428, max=183190, avg=42182.81, stdev=74105.16 clat percentiles (usec): | 1.00th=[ 429], 5.00th=[ 429], 10.00th=[ 429], 20.00th=[ 457], | 30.00th=[ 457], 40.00th=[ 635], 50.00th=[ 635], 60.00th=[ 750], | 70.00th=[ 67634], 80.00th=[ 67634], 90.00th=[183501], 95.00th=[183501], | 99.00th=[183501], 99.50th=[183501], 99.90th=[183501], 99.95th=[183501], | 99.99th=[183501] bw ( KiB/s): min= 4096, max= 6131, per=60.45%, avg=5113.50, stdev=1438.96, samples=2 iops : min= 4, max= 5, avg= 4.50, stdev= 0.71, samples=2 write: IOPS=2, BW=2811KiB/s (2878kB/s)(6144KiB/2186msec); 0 zone resets clat (msec): min=197, max=471, avg=301.29, stdev=113.08 lat (msec): min=197, max=471, avg=301.35, stdev=113.10 clat percentiles (msec): | 1.00th=[ 199], 5.00th=[ 199], 10.00th=[ 199], 20.00th=[ 226], | 30.00th=[ 226], 40.00th=[ 230], 50.00th=[ 230], 60.00th=[ 271], | 70.00th=[ 414], 80.00th=[ 414], 90.00th=[ 472], 95.00th=[ 472], | 99.00th=[ 472], 99.50th=[ 472], 99.90th=[ 472], 99.95th=[ 472], | 99.99th=[ 472] bw ( KiB/s): min= 1568, max= 4087, per=20.57%, avg=2436.50, stdev=1123.12, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 lat (usec) : 500=16.67%, 750=16.67% lat (msec) : 100=8.33%, 250=33.33%, 500=25.00% cpu : usr=0.00%, sys=16.20%, ctx=70, 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=179485: Wed Aug 19 10:10:20 2026 read: IOPS=2, BW=2240KiB/s (2293kB/s)(5120KiB/2286msec) clat (usec): min=441, max=147493, avg=29944.79, stdev=65711.69 lat (usec): min=442, max=147493, avg=29945.59, stdev=65711.47 clat percentiles (usec): | 1.00th=[ 441], 5.00th=[ 441], 10.00th=[ 441], 20.00th=[ 441], | 30.00th=[ 562], 40.00th=[ 562], 50.00th=[ 586], 60.00th=[ 586], | 70.00th=[ 644], 80.00th=[ 644], 90.00th=[147850], 95.00th=[147850], | 99.00th=[147850], 99.50th=[147850], 99.90th=[147850], 99.95th=[147850], | 99.99th=[147850] bw ( KiB/s): min= 8192, max= 8192, per=96.84%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 8, max= 8, avg= 8.00, stdev= 0.00, samples=1 write: IOPS=3, BW=3136KiB/s (3211kB/s)(7168KiB/2286msec); 0 zone resets clat (msec): min=114, max=646, avg=292.93, stdev=182.09 lat (msec): min=114, max=646, avg=293.01, stdev=182.10 clat percentiles (msec): | 1.00th=[ 115], 5.00th=[ 115], 10.00th=[ 115], 20.00th=[ 178], | 30.00th=[ 182], 40.00th=[ 182], 50.00th=[ 255], 60.00th=[ 266], | 70.00th=[ 266], 80.00th=[ 414], 90.00th=[ 651], 95.00th=[ 651], | 99.00th=[ 651], 99.50th=[ 651], 99.90th=[ 651], 99.95th=[ 651], | 99.99th=[ 651] bw ( KiB/s): min= 1570, max= 4096, per=20.59%, avg=2438.00, stdev=1127.60, samples=4 iops : min= 1, max= 4, avg= 1.75, stdev= 1.50, samples=4 lat (usec) : 500=8.33%, 750=25.00% lat (msec) : 250=33.33%, 500=25.00%, 750=8.33% cpu : usr=0.09%, sys=15.80%, ctx=106, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=8459KiB/s (8662kB/s), 846KiB/s-3396KiB/s (866kB/s-3477kB/s), io=20.0MiB (20.0MB), run=2111-2421msec WRITE: bw=11.6MiB/s (12.1MB/s), 2425KiB/s-4230KiB/s (2484kB/s-4331kB/s), io=28.0MiB (29.4MB), run=2111-2421msec 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=179492: Wed Aug 19 10:10:33 2026 read: IOPS=1, BW=4436KiB/s (4543kB/s)(12.0MiB/2770msec) clat (msec): min=492, max=1241, avg=850.72, stdev=375.42 lat (msec): min=492, max=1241, avg=850.72, stdev=375.42 clat percentiles (msec): | 1.00th=[ 493], 5.00th=[ 493], 10.00th=[ 493], 20.00th=[ 493], | 30.00th=[ 493], 40.00th=[ 818], 50.00th=[ 818], 60.00th=[ 818], | 70.00th=[ 1234], 80.00th=[ 1234], 90.00th=[ 1234], 95.00th=[ 1234], | 99.00th=[ 1234], 99.50th=[ 1234], 99.90th=[ 1234], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 5312, max= 8175, per=100.00%, avg=6743.50, stdev=2024.45, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.94%, ctx=62, 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=179494: Wed Aug 19 10:10:33 2026 read: IOPS=0, BW=1184KiB/s (1213kB/s)(4096KiB/3459msec) clat (nsec): min=907696k, max=907696k, avg=907695953.00, stdev= 0.00 lat (nsec): min=907697k, max=907697k, avg=907696788.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 911], 5.00th=[ 911], 10.00th=[ 911], 20.00th=[ 911], | 30.00th=[ 911], 40.00th=[ 911], 50.00th=[ 911], 60.00th=[ 911], | 70.00th=[ 911], 80.00th=[ 911], 90.00th=[ 911], 95.00th=[ 911], | 99.00th=[ 911], 99.50th=[ 911], 99.90th=[ 911], 99.95th=[ 911], | 99.99th=[ 911] bw ( KiB/s): min= 8192, max= 8192, per=100.00%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2368KiB/s (2425kB/s)(8192KiB/3459msec); 0 zone resets clat (msec): min=262, max=1819, avg=1041.25, stdev=1100.88 lat (msec): min=263, max=1820, avg=1041.77, stdev=1100.79 clat percentiles (msec): | 1.00th=[ 264], 5.00th=[ 264], 10.00th=[ 264], 20.00th=[ 264], | 30.00th=[ 264], 40.00th=[ 264], 50.00th=[ 264], 60.00th=[ 1821], | 70.00th=[ 1821], 80.00th=[ 1821], 90.00th=[ 1821], 95.00th=[ 1821], | 99.00th=[ 1821], 99.50th=[ 1821], 99.90th=[ 1821], 99.95th=[ 1821], | 99.99th=[ 1821] bw ( KiB/s): min= 8175, max= 8175, per=86.30%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.31%, ctx=72, 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=179495: Wed Aug 19 10:10:33 2026 write: IOPS=1, BW=4412KiB/s (4518kB/s)(12.0MiB/2785msec); 0 zone resets clat (msec): min=538, max=1523, avg=886.32, stdev=552.68 lat (msec): min=539, max=1523, avg=886.71, stdev=552.66 clat percentiles (msec): | 1.00th=[ 542], 5.00th=[ 542], 10.00th=[ 542], 20.00th=[ 542], | 30.00th=[ 542], 40.00th=[ 600], 50.00th=[ 600], 60.00th=[ 600], | 70.00th=[ 1519], 80.00th=[ 1519], 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= 7953, max= 8175, per=85.13%, avg=8064.00, stdev=156.98, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.04%, sys=3.84%, 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=179498: Wed Aug 19 10:10:33 2026 write: IOPS=1, BW=4951KiB/s (5070kB/s)(12.0MiB/2482msec); 0 zone resets clat (msec): min=250, max=1429, avg=707.03, stdev=633.11 lat (msec): min=250, max=1429, avg=707.36, stdev=633.03 clat percentiles (msec): | 1.00th=[ 251], 5.00th=[ 251], 10.00th=[ 251], 20.00th=[ 251], | 30.00th=[ 251], 40.00th=[ 443], 50.00th=[ 443], 60.00th=[ 443], | 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=14707, max=14707, per=100.00%, avg=14707.00, stdev= 0.00, samples=1 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=1 lat (msec) : 500=66.67%, 2000=33.33% cpu : usr=0.00%, sys=5.16%, ctx=56, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=4737KiB/s (4850kB/s), 1184KiB/s-4436KiB/s (1213kB/s-4543kB/s), io=16.0MiB (16.8MB), run=2770-3459msec WRITE: bw=9473KiB/s (9701kB/s), 2368KiB/s-4951KiB/s (2425kB/s-5070kB/s), io=32.0MiB (33.6MB), run=2482-3459msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179493: Wed Aug 19 10:10:33 2026 read: IOPS=1, BW=5466KiB/s (5597kB/s)(12.0MiB/2248msec) clat (msec): min=650, max=768, avg=724.02, stdev=64.13 lat (msec): min=650, max=768, avg=724.02, stdev=64.14 clat percentiles (msec): | 1.00th=[ 651], 5.00th=[ 651], 10.00th=[ 651], 20.00th=[ 651], | 30.00th=[ 651], 40.00th=[ 751], 50.00th=[ 751], 60.00th=[ 751], | 70.00th=[ 768], 80.00th=[ 768], 90.00th=[ 768], 95.00th=[ 768], | 99.00th=[ 768], 99.50th=[ 768], 99.90th=[ 768], 99.95th=[ 768], | 99.99th=[ 768] bw ( KiB/s): min= 8062, max= 8159, per=100.00%, avg=8110.50, stdev=68.59, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=66.67% cpu : usr=0.00%, sys=12.42%, ctx=282, 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=179496: Wed Aug 19 10:10:33 2026 read: IOPS=0, BW=1577KiB/s (1615kB/s)(4096KiB/2597msec) clat (nsec): min=843211k, max=843211k, avg=843210582.00, stdev= 0.00 lat (nsec): min=843212k, max=843212k, avg=843211764.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 844], 5.00th=[ 844], 10.00th=[ 844], 20.00th=[ 844], | 30.00th=[ 844], 40.00th=[ 844], 50.00th=[ 844], 60.00th=[ 844], | 70.00th=[ 844], 80.00th=[ 844], 90.00th=[ 844], 95.00th=[ 844], | 99.00th=[ 844], 99.50th=[ 844], 99.90th=[ 844], 99.95th=[ 844], | 99.99th=[ 844] 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=3154KiB/s (3230kB/s)(8192KiB/2597msec); 0 zone resets clat (msec): min=696, max=846, avg=771.90, stdev=105.95 lat (msec): min=697, max=847, avg=772.19, stdev=105.82 clat percentiles (msec): | 1.00th=[ 701], 5.00th=[ 701], 10.00th=[ 701], 20.00th=[ 701], | 30.00th=[ 701], 40.00th=[ 701], 50.00th=[ 701], 60.00th=[ 844], | 70.00th=[ 844], 80.00th=[ 844], 90.00th=[ 844], 95.00th=[ 844], | 99.00th=[ 844], 99.50th=[ 844], 99.90th=[ 844], 99.95th=[ 844], | 99.99th=[ 844] bw ( KiB/s): min= 8062, max= 8062, per=74.43%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=66.67% cpu : usr=0.00%, sys=5.12%, ctx=85, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179497: Wed Aug 19 10:10:33 2026 write: IOPS=0, BW=4062KiB/s (4160kB/s)(12.0MiB/3025msec); 0 zone resets clat (msec): min=464, max=1700, avg=987.39, stdev=639.46 lat (msec): min=464, max=1700, avg=987.84, stdev=639.54 clat percentiles (msec): | 1.00th=[ 464], 5.00th=[ 464], 10.00th=[ 464], 20.00th=[ 464], | 30.00th=[ 464], 40.00th=[ 802], 50.00th=[ 802], 60.00th=[ 802], | 70.00th=[ 1703], 80.00th=[ 1703], 90.00th=[ 1703], 95.00th=[ 1703], | 99.00th=[ 1703], 99.50th=[ 1703], 99.90th=[ 1703], 99.95th=[ 1703], | 99.99th=[ 1703] bw ( KiB/s): min= 8062, max= 8126, per=74.72%, avg=8094.00, stdev=45.25, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.11%, ctx=44, 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=179499: Wed Aug 19 10:10:33 2026 write: IOPS=1, BW=4969KiB/s (5088kB/s)(12.0MiB/2473msec); 0 zone resets clat (msec): min=666, max=1042, avg=804.04, stdev=207.16 lat (msec): min=666, max=1042, avg=804.26, stdev=207.16 clat percentiles (msec): | 1.00th=[ 667], 5.00th=[ 667], 10.00th=[ 667], 20.00th=[ 667], | 30.00th=[ 667], 40.00th=[ 701], 50.00th=[ 701], 60.00th=[ 701], | 70.00th=[ 1045], 80.00th=[ 1045], 90.00th=[ 1045], 95.00th=[ 1045], | 99.00th=[ 1045], 99.50th=[ 1045], 99.90th=[ 1045], 99.95th=[ 1045], | 99.99th=[ 1045] bw ( KiB/s): min= 8062, max= 8159, per=74.88%, avg=8110.50, stdev=68.59, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.00%, sys=4.00%, ctx=63, 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=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=6309KiB/s (6460kB/s), 1577KiB/s-5466KiB/s (1615kB/s-5597kB/s), io=16.0MiB (16.8MB), run=2248-2597msec WRITE: bw=10.6MiB/s (11.1MB/s), 3154KiB/s-4969KiB/s (3230kB/s-5088kB/s), io=32.0MiB (33.6MB), run=2473-3025msec