== sanity test 398b: DIO and buffer IO race ============== 23:35:44 (1781235344) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.28631 s, 8.0 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=179656: Thu Jun 11 23:38:01 2026 read: IOPS=12, BW=50.6KiB/s (51.8kB/s)(5992KiB/118427msec) clat (usec): min=27, max=781734, avg=43223.07, stdev=33757.69 lat (usec): min=27, max=781735, avg=43225.97, stdev=33759.32 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 7832], 10.00th=[ 16057], 20.00th=[ 21365], | 30.00th=[ 26346], 40.00th=[ 31589], 50.00th=[ 36963], 60.00th=[ 43254], | 70.00th=[ 52167], 80.00th=[ 62129], 90.00th=[ 77071], 95.00th=[ 91751], | 99.00th=[145753], 99.50th=[158335], 99.90th=[261096], 99.95th=[784335], | 99.99th=[784335] bw ( KiB/s): min= 5, max= 120, per=24.78%, avg=50.05, stdev=19.85, samples=233 iops : min= 1, max= 30, avg=11.88, stdev= 5.01, samples=233 write: IOPS=13, BW=53.2KiB/s (54.4kB/s)(6296KiB/118427msec); 0 zone resets clat (usec): min=732, max=266408, avg=33841.44, stdev=35132.03 lat (usec): min=732, max=266410, avg=33843.54, stdev=35132.16 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1385], 10.00th=[ 1647], 20.00th=[ 3589], | 30.00th=[ 7046], 40.00th=[ 15139], 50.00th=[ 24249], 60.00th=[ 32900], | 70.00th=[ 44827], 80.00th=[ 58459], 90.00th=[ 79168], 95.00th=[104334], | 99.00th=[154141], 99.50th=[164627], 99.90th=[250610], 99.95th=[267387], | 99.99th=[267387] bw ( KiB/s): min= 7, max= 144, per=24.94%, avg=52.87, stdev=22.86, samples=232 iops : min= 1, max= 36, avg=12.58, stdev= 5.78, samples=232 lat (usec) : 50=0.20%, 100=1.92%, 250=0.16%, 750=0.07%, 1000=0.10% lat (msec) : 2=6.45%, 4=4.43%, 10=7.39%, 20=10.64%, 50=39.91% lat (msec) : 100=24.19%, 250=4.43%, 500=0.10%, 1000=0.03% cpu : usr=0.08%, sys=4.82%, ctx=6350, 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=179657: Thu Jun 11 23:38:01 2026 read: IOPS=12, BW=50.4KiB/s (51.6kB/s)(5940KiB/117939msec) clat (usec): min=43, max=207467, avg=43486.75, stdev=27242.16 lat (usec): min=43, max=207469, avg=43491.99, stdev=27239.41 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 12256], 10.00th=[ 17433], 20.00th=[ 22676], | 30.00th=[ 27395], 40.00th=[ 32113], 50.00th=[ 38011], 60.00th=[ 43779], | 70.00th=[ 51119], 80.00th=[ 61604], 90.00th=[ 77071], 95.00th=[ 93848], | 99.00th=[147850], 99.50th=[173016], 99.90th=[181404], 99.95th=[206570], | 99.99th=[206570] bw ( KiB/s): min= 5, max= 120, per=24.58%, avg=49.65, stdev=19.35, samples=232 iops : min= 1, max= 30, avg=11.77, stdev= 4.87, samples=232 write: IOPS=13, BW=53.8KiB/s (55.1kB/s)(6348KiB/117939msec); 0 zone resets clat (usec): min=865, max=670708, avg=33355.26, stdev=36867.57 lat (usec): min=867, max=670709, avg=33358.29, stdev=36866.98 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1385], 10.00th=[ 1663], 20.00th=[ 3785], | 30.00th=[ 7242], 40.00th=[ 15795], 50.00th=[ 24249], 60.00th=[ 32900], | 70.00th=[ 42206], 80.00th=[ 56361], 90.00th=[ 80217], 95.00th=[100140], | 99.00th=[145753], 99.50th=[179307], 99.90th=[198181], 99.95th=[666895], | 99.99th=[666895] bw ( KiB/s): min= 5, max= 126, per=24.95%, avg=52.90, stdev=23.76, samples=232 iops : min= 1, max= 31, avg=12.58, stdev= 5.99, samples=232 lat (usec) : 50=0.16%, 100=1.30%, 250=0.20%, 1000=0.03% lat (msec) : 2=6.12%, 4=4.65%, 10=7.06%, 20=10.87%, 50=42.38% lat (msec) : 100=22.72%, 250=4.46%, 750=0.03% cpu : usr=0.08%, sys=5.01%, ctx=6534, 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=179658: Thu Jun 11 23:38:01 2026 read: IOPS=12, BW=51.2KiB/s (52.4kB/s)(6028KiB/117751msec) clat (usec): min=30, max=781573, avg=43984.49, stdev=34189.58 lat (usec): min=31, max=781575, avg=43991.08, stdev=34191.32 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 10028], 10.00th=[ 16450], 20.00th=[ 22152], | 30.00th=[ 26870], 40.00th=[ 31589], 50.00th=[ 36963], 60.00th=[ 44303], | 70.00th=[ 51643], 80.00th=[ 62129], 90.00th=[ 78119], 95.00th=[ 95945], | 99.00th=[147850], 99.50th=[168821], 99.90th=[221250], 99.95th=[784335], | 99.99th=[784335] bw ( KiB/s): min= 5, max= 111, per=25.07%, avg=50.64, stdev=19.46, samples=232 iops : min= 1, max= 27, avg=12.01, stdev= 4.89, samples=232 write: IOPS=13, BW=53.2KiB/s (54.4kB/s)(6260KiB/117751msec); 0 zone resets clat (usec): min=976, max=254713, avg=32603.85, stdev=33407.06 lat (usec): min=978, max=254715, avg=32608.01, stdev=33408.69 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1385], 10.00th=[ 1631], 20.00th=[ 3458], | 30.00th=[ 6783], 40.00th=[ 14746], 50.00th=[ 23725], 60.00th=[ 32113], | 70.00th=[ 42730], 80.00th=[ 56886], 90.00th=[ 80217], 95.00th=[100140], | 99.00th=[143655], 99.50th=[152044], 99.90th=[200279], 99.95th=[254804], | 99.99th=[254804] bw ( KiB/s): min= 7, max= 151, per=24.74%, avg=52.44, stdev=23.40, samples=232 iops : min= 1, max= 37, avg=12.47, stdev= 5.90, samples=232 lat (usec) : 50=0.23%, 100=1.69%, 250=0.13%, 1000=0.03% lat (msec) : 2=6.51%, 4=4.46%, 10=7.32%, 20=10.77%, 50=40.66% lat (msec) : 100=23.57%, 250=4.56%, 500=0.03%, 1000=0.03% cpu : usr=0.06%, sys=5.03%, ctx=6447, 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=179659: Thu Jun 11 23:38:01 2026 read: IOPS=12, BW=51.2KiB/s (52.4kB/s)(6052KiB/118306msec) clat (usec): min=38, max=226657, avg=43120.12, stdev=27962.97 lat (usec): min=38, max=226658, avg=43121.71, stdev=27963.08 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 297], 10.00th=[ 15401], 20.00th=[ 21365], | 30.00th=[ 27132], 40.00th=[ 32375], 50.00th=[ 38011], 60.00th=[ 44827], | 70.00th=[ 52167], 80.00th=[ 61604], 90.00th=[ 77071], 95.00th=[ 92799], | 99.00th=[139461], 99.50th=[149947], 99.90th=[196084], 99.95th=[227541], | 99.99th=[227541] bw ( KiB/s): min= 7, max= 126, per=25.32%, avg=51.15, stdev=19.41, samples=231 iops : min= 1, max= 31, avg=12.14, stdev= 4.90, samples=231 write: IOPS=13, BW=52.7KiB/s (53.0kB/s)(6236KiB/118306msec); 0 zone resets clat (usec): min=1118, max=727149, avg=33753.93, stdev=38449.90 lat (usec): min=1119, max=727152, avg=33760.70, stdev=38446.31 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1369], 10.00th=[ 1598], 20.00th=[ 3654], | 30.00th=[ 7111], 40.00th=[ 14222], 50.00th=[ 23725], 60.00th=[ 31589], | 70.00th=[ 42730], 80.00th=[ 58983], 90.00th=[ 85459], 95.00th=[105382], | 99.00th=[143655], 99.50th=[156238], 99.90th=[200279], 99.95th=[725615], | 99.99th=[725615] bw ( KiB/s): min= 7, max= 120, per=24.65%, avg=52.26, stdev=22.68, samples=232 iops : min= 1, max= 30, avg=12.44, stdev= 5.74, samples=232 lat (usec) : 50=0.52%, 100=1.73%, 250=0.20%, 500=0.03%, 750=0.07% lat (usec) : 1000=0.03% lat (msec) : 2=6.28%, 4=4.69%, 10=7.19%, 20=11.10%, 50=39.16% lat (msec) : 100=23.99%, 250=4.98%, 750=0.03% cpu : usr=0.07%, sys=4.94%, ctx=6384, 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=203KiB/s (208kB/s), 50.4KiB/s-51.2KiB/s (51.6kB/s-52.4kB/s), io=23.4MiB (24.6MB), run=117751-118427msec WRITE: bw=212KiB/s (217kB/s), 52.7KiB/s-53.8KiB/s (53.0kB/s-55.1kB/s), io=24.6MiB (25.7MB), run=117751-118427msec fio: pid=179663, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=179660: Thu Jun 11 23:38:43 2026 read: IOPS=9, BW=37.4KiB/s (38.3kB/s)(5992KiB/160190msec) clat (msec): min=5, max=779, avg=41.94, stdev=40.62 lat (msec): min=5, max=779, avg=41.94, stdev=40.62 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 29], 60.00th=[ 36], | 70.00th=[ 45], 80.00th=[ 61], 90.00th=[ 90], 95.00th=[ 121], | 99.00th=[ 174], 99.50th=[ 199], 99.90th=[ 317], 99.95th=[ 776], | 99.99th=[ 776] bw ( KiB/s): min= 7, max= 127, per=25.44%, avg=37.90, stdev=25.70, samples=308 iops : min= 1, max= 31, avg= 8.81, stdev= 6.48, samples=308 write: IOPS=9, BW=39.3KiB/s (40.2kB/s)(6296KiB/160190msec); 0 zone resets clat (msec): min=9, max=323, avg=61.63, stdev=41.56 lat (msec): min=9, max=323, avg=61.63, stdev=41.56 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 30], | 30.00th=[ 35], 40.00th=[ 43], 50.00th=[ 50], 60.00th=[ 61], | 70.00th=[ 72], 80.00th=[ 90], 90.00th=[ 118], 95.00th=[ 142], | 99.00th=[ 211], 99.50th=[ 232], 99.90th=[ 309], 99.95th=[ 326], | 99.99th=[ 326] bw ( KiB/s): min= 7, max= 134, per=25.02%, avg=39.03, stdev=23.42, samples=314 iops : min= 1, max= 33, avg= 9.10, stdev= 5.89, samples=314 lat (msec) : 10=2.34%, 20=15.27%, 50=44.76%, 100=25.72%, 250=11.69% lat (msec) : 500=0.20%, 1000=0.03% cpu : usr=0.06%, sys=2.06%, ctx=5024, 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=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=179661: Thu Jun 11 23:38:43 2026 read: IOPS=9, BW=37.2KiB/s (38.1kB/s)(5940KiB/159537msec) clat (msec): min=5, max=720, avg=42.56, stdev=41.27 lat (msec): min=5, max=720, avg=42.56, stdev=41.27 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 25], 50.00th=[ 29], 60.00th=[ 35], | 70.00th=[ 43], 80.00th=[ 61], 90.00th=[ 99], 95.00th=[ 124], | 99.00th=[ 180], 99.50th=[ 199], 99.90th=[ 321], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 7, max= 151, per=25.32%, avg=37.73, stdev=24.89, samples=306 iops : min= 1, max= 37, avg= 8.77, stdev= 6.26, samples=306 write: IOPS=9, BW=39.8KiB/s (40.7kB/s)(6348KiB/159537msec); 0 zone resets clat (msec): min=11, max=304, avg=60.47, stdev=41.18 lat (msec): min=11, max=304, avg=60.48, stdev=41.18 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 20], 10.00th=[ 24], 20.00th=[ 30], | 30.00th=[ 35], 40.00th=[ 41], 50.00th=[ 47], 60.00th=[ 56], | 70.00th=[ 68], 80.00th=[ 88], 90.00th=[ 118], 95.00th=[ 146], | 99.00th=[ 205], 99.50th=[ 232], 99.90th=[ 300], 99.95th=[ 305], | 99.99th=[ 305] bw ( KiB/s): min= 7, max= 142, per=25.37%, avg=39.58, stdev=23.15, samples=311 iops : min= 1, max= 35, avg= 9.23, stdev= 5.83, samples=311 lat (msec) : 10=2.15%, 20=15.01%, 50=46.91%, 100=23.70%, 250=12.01% lat (msec) : 500=0.20%, 750=0.03% cpu : usr=0.05%, sys=2.07%, ctx=4930, 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=179662: Thu Jun 11 23:38:43 2026 read: IOPS=9, BW=37.8KiB/s (38.7kB/s)(6028KiB/159547msec) clat (msec): min=5, max=284, avg=41.71, stdev=36.40 lat (msec): min=5, max=284, avg=41.71, stdev=36.41 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 29], 60.00th=[ 36], | 70.00th=[ 44], 80.00th=[ 58], 90.00th=[ 92], 95.00th=[ 124], | 99.00th=[ 184], 99.50th=[ 197], 99.90th=[ 275], 99.95th=[ 284], | 99.99th=[ 284] bw ( KiB/s): min= 7, max= 143, per=25.45%, avg=37.93, stdev=24.57, samples=309 iops : min= 1, max= 35, avg= 8.83, stdev= 6.20, samples=309 write: IOPS=9, BW=39.2KiB/s (40.2kB/s)(6260KiB/159547msec); 0 zone resets clat (msec): min=8, max=690, avg=61.62, stdev=45.17 lat (msec): min=8, max=690, avg=61.62, stdev=45.17 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 20], 10.00th=[ 23], 20.00th=[ 29], | 30.00th=[ 34], 40.00th=[ 40], 50.00th=[ 48], 60.00th=[ 58], | 70.00th=[ 71], 80.00th=[ 89], 90.00th=[ 122], 95.00th=[ 144], | 99.00th=[ 213], 99.50th=[ 236], 99.90th=[ 305], 99.95th=[ 693], | 99.99th=[ 693] bw ( KiB/s): min= 7, max= 128, per=24.84%, avg=38.75, stdev=23.94, samples=314 iops : min= 1, max= 32, avg= 9.03, stdev= 6.03, samples=314 lat (msec) : 10=2.18%, 20=15.43%, 50=46.58%, 100=23.50%, 250=12.04% lat (msec) : 500=0.23%, 750=0.03% cpu : usr=0.05%, sys=2.02%, ctx=5031, 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= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=179663: Thu Jun 11 23:38:43 2026 read: IOPS=9, BW=37.8KiB/s (38.7kB/s)(5988KiB/158590msec) clat (msec): min=5, max=258, avg=42.44, stdev=36.77 lat (msec): min=5, max=258, avg=42.45, stdev=36.77 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 29], 60.00th=[ 36], | 70.00th=[ 46], 80.00th=[ 63], 90.00th=[ 93], 95.00th=[ 121], | 99.00th=[ 182], 99.50th=[ 201], 99.90th=[ 251], 99.95th=[ 259], | 99.99th=[ 259] bw ( KiB/s): min= 7, max= 142, per=25.94%, avg=38.66, stdev=24.99, samples=301 iops : min= 1, max= 35, avg= 9.00, stdev= 6.31, samples=301 write: IOPS=9, BW=38.0KiB/s (39.9kB/s)(6184KiB/158590msec); 0 zone resets clat (msec): min=11, max=740, avg=61.23, stdev=45.50 lat (msec): min=11, max=740, avg=61.23, stdev=45.50 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 19], 10.00th=[ 23], 20.00th=[ 29], | 30.00th=[ 34], 40.00th=[ 41], 50.00th=[ 48], 60.00th=[ 59], | 70.00th=[ 71], 80.00th=[ 89], 90.00th=[ 116], 95.00th=[ 144], | 99.00th=[ 218], 99.50th=[ 259], 99.90th=[ 334], 99.95th=[ 743], | 99.99th=[ 743] bw ( KiB/s): min= 7, max= 119, per=24.75%, avg=38.62, stdev=23.52, samples=311 iops : min= 1, max= 29, avg= 8.99, stdev= 5.91, samples=311 lat (msec) : 10=2.14%, 20=16.20%, 50=44.25%, 100=25.59%, 250=11.50% lat (msec) : 500=0.26%, 750=0.03% cpu : usr=0.05%, sys=2.04%, ctx=4807, 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=1498,1546,0,0 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=149KiB/s (153kB/s), 37.2KiB/s-37.8KiB/s (38.1kB/s-38.7kB/s), io=23.4MiB (24.5MB), run=158590-160190msec WRITE: bw=157KiB/s (160kB/s), 38.0KiB/s-39.8KiB/s (39.9kB/s-40.7kB/s), io=24.5MiB (25.7MB), run=158590-160190msec 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=179701: Thu Jun 11 23:39:25 2026 read: IOPS=11, BW=188KiB/s (193kB/s)(5920KiB/31467msec) clat (usec): min=39, max=198653, avg=46572.71, stdev=31163.59 lat (usec): min=39, max=198654, avg=46573.94, stdev=31163.56 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 58], 10.00th=[ 13829], 20.00th=[ 21627], | 30.00th=[ 27395], 40.00th=[ 34341], 50.00th=[ 40633], 60.00th=[ 50070], | 70.00th=[ 57934], 80.00th=[ 67634], 90.00th=[ 88605], 95.00th=[106431], | 99.00th=[141558], 99.50th=[145753], 99.90th=[198181], 99.95th=[198181], | 99.99th=[198181] bw ( KiB/s): min= 31, max= 380, per=24.66%, avg=187.66, stdev=74.74, samples=61 iops : min= 1, max= 23, avg=11.00, stdev= 4.71, samples=61 write: IOPS=12, BW=202KiB/s (207kB/s)(6368KiB/31467msec); 0 zone resets clat (usec): min=1294, max=233771, avg=35554.06, stdev=36247.06 lat (usec): min=1295, max=233772, avg=35556.41, stdev=36247.18 clat percentiles (usec): | 1.00th=[ 1647], 5.00th=[ 1991], 10.00th=[ 3032], 20.00th=[ 5800], | 30.00th=[ 8979], 40.00th=[ 17433], 50.00th=[ 23987], 60.00th=[ 32113], | 70.00th=[ 45351], 80.00th=[ 60031], 90.00th=[ 87557], 95.00th=[109577], | 99.00th=[154141], 99.50th=[177210], 99.90th=[233833], 99.95th=[233833], | 99.99th=[233833] bw ( KiB/s): min= 31, max= 445, per=25.34%, avg=202.75, stdev=86.38, samples=61 iops : min= 1, max= 27, avg=11.95, stdev= 5.48, samples=61 lat (usec) : 50=0.39%, 100=2.99%, 250=0.39% lat (msec) : 2=2.73%, 4=5.21%, 10=8.20%, 20=11.20%, 50=36.20% lat (msec) : 100=25.91%, 250=6.77% cpu : usr=0.06%, sys=5.46%, ctx=1723, 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=179702: Thu Jun 11 23:39:25 2026 read: IOPS=11, BW=189KiB/s (193kB/s)(5744KiB/30439msec) clat (usec): min=36, max=203930, avg=46213.24, stdev=32233.26 lat (usec): min=36, max=203930, avg=46214.79, stdev=32232.95 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 64], 10.00th=[ 13566], 20.00th=[ 22414], | 30.00th=[ 28181], 40.00th=[ 33817], 50.00th=[ 41157], 60.00th=[ 47449], | 70.00th=[ 57410], 80.00th=[ 67634], 90.00th=[ 85459], 95.00th=[104334], | 99.00th=[156238], 99.50th=[164627], 99.90th=[204473], 99.95th=[204473], | 99.99th=[204473] bw ( KiB/s): min= 31, max= 384, per=24.86%, avg=189.17, stdev=74.26, samples=59 iops : min= 1, max= 24, avg=11.07, stdev= 4.77, samples=59 write: IOPS=13, BW=215KiB/s (220kB/s)(6544KiB/30439msec); 0 zone resets clat (usec): min=1652, max=227940, avg=33363.42, stdev=32834.91 lat (usec): min=1655, max=227942, avg=33366.92, stdev=32838.82 clat percentiles (usec): | 1.00th=[ 1811], 5.00th=[ 2376], 10.00th=[ 3589], 20.00th=[ 5997], | 30.00th=[ 10028], 40.00th=[ 15401], 50.00th=[ 24773], 60.00th=[ 31589], | 70.00th=[ 42206], 80.00th=[ 54264], 90.00th=[ 78119], 95.00th=[104334], | 99.00th=[135267], 99.50th=[145753], 99.90th=[227541], 99.95th=[227541], | 99.99th=[227541] bw ( KiB/s): min= 93, max= 604, per=26.81%, avg=214.46, stdev=97.88, samples=59 iops : min= 5, max= 37, avg=12.68, stdev= 6.19, samples=59 lat (usec) : 50=0.26%, 100=3.39%, 250=0.26%, 1000=0.13% lat (msec) : 2=1.82%, 4=4.56%, 10=9.77%, 20=11.20%, 50=39.58% lat (msec) : 100=23.70%, 250=5.34% cpu : usr=0.05%, sys=5.52%, ctx=1709, 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=179703: Thu Jun 11 23:39:25 2026 read: IOPS=12, BW=204KiB/s (209kB/s)(6256KiB/30629msec) clat (usec): min=48, max=189249, avg=44574.43, stdev=32021.73 lat (usec): min=49, max=189250, avg=44576.37, stdev=32023.05 clat percentiles (usec): | 1.00th=[ 54], 5.00th=[ 63], 10.00th=[ 2540], 20.00th=[ 21627], | 30.00th=[ 27395], 40.00th=[ 32637], 50.00th=[ 38536], 60.00th=[ 44827], | 70.00th=[ 53216], 80.00th=[ 65799], 90.00th=[ 84411], 95.00th=[103285], | 99.00th=[166724], 99.50th=[177210], 99.90th=[189793], 99.95th=[189793], | 99.99th=[189793] bw ( KiB/s): min= 63, max= 510, per=26.88%, avg=204.57, stdev=85.38, samples=60 iops : min= 3, max= 31, avg=12.07, stdev= 5.41, samples=60 write: IOPS=12, BW=197KiB/s (202kB/s)(6032KiB/30629msec); 0 zone resets clat (usec): min=1545, max=225172, avg=34450.70, stdev=33313.89 lat (usec): min=1546, max=225173, avg=34452.94, stdev=33313.89 clat percentiles (usec): | 1.00th=[ 1696], 5.00th=[ 1975], 10.00th=[ 2835], 20.00th=[ 5538], | 30.00th=[ 11338], 40.00th=[ 18482], 50.00th=[ 25822], 60.00th=[ 33817], | 70.00th=[ 42206], 80.00th=[ 55313], 90.00th=[ 81265], 95.00th=[ 99091], | 99.00th=[139461], 99.50th=[166724], 99.90th=[225444], 99.95th=[225444], | 99.99th=[225444] bw ( KiB/s): min= 63, max= 380, per=24.40%, avg=195.20, stdev=82.01, samples=60 iops : min= 3, max= 23, avg=11.45, stdev= 5.26, samples=60 lat (usec) : 50=0.13%, 100=4.30%, 250=0.39%, 500=0.13% lat (msec) : 2=2.73%, 4=4.95%, 10=6.64%, 20=10.16%, 50=41.67% lat (msec) : 100=23.83%, 250=5.08% cpu : usr=0.07%, sys=5.41%, ctx=1682, 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=179704: Thu Jun 11 23:39:25 2026 read: IOPS=12, BW=198KiB/s (203kB/s)(6032KiB/30492msec) clat (usec): min=38, max=239918, avg=46270.60, stdev=36849.12 lat (usec): min=38, max=239919, avg=46271.98, stdev=36849.22 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 61], 10.00th=[ 72], 20.00th=[ 21103], | 30.00th=[ 26870], 40.00th=[ 32375], 50.00th=[ 36963], 60.00th=[ 47449], | 70.00th=[ 55837], 80.00th=[ 66847], 90.00th=[ 89654], 95.00th=[116917], | 99.00th=[185598], 99.50th=[206570], 99.90th=[240124], 99.95th=[240124], | 99.99th=[240124] bw ( KiB/s): min= 94, max= 448, per=25.90%, avg=197.07, stdev=82.72, samples=59 iops : min= 5, max= 28, avg=11.58, stdev= 5.29, samples=59 write: IOPS=12, BW=205KiB/s (210kB/s)(6256KiB/30492msec); 0 zone resets clat (usec): min=1276, max=196357, avg=32838.66, stdev=32107.55 lat (usec): min=1278, max=196359, avg=32842.82, stdev=32105.91 clat percentiles (usec): | 1.00th=[ 1418], 5.00th=[ 2057], 10.00th=[ 3326], 20.00th=[ 5669], | 30.00th=[ 10028], 40.00th=[ 15533], 50.00th=[ 23462], 60.00th=[ 31065], | 70.00th=[ 41157], 80.00th=[ 54789], 90.00th=[ 81265], 95.00th=[ 98042], | 99.00th=[137364], 99.50th=[175113], 99.90th=[196084], 99.95th=[196084], | 99.99th=[196084] bw ( KiB/s): min= 31, max= 478, per=25.68%, avg=205.42, stdev=94.96, samples=59 iops : min= 1, max= 29, avg=12.10, stdev= 6.03, samples=59 lat (usec) : 50=0.52%, 100=4.82%, 250=0.39%, 500=0.13%, 750=0.13% lat (msec) : 2=2.47%, 4=4.30%, 10=8.46%, 20=10.81%, 50=38.28% lat (msec) : 100=23.44%, 250=6.25% cpu : usr=0.07%, sys=5.50%, ctx=1663, 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=761KiB/s (779kB/s), 188KiB/s-204KiB/s (193kB/s-209kB/s), io=23.4MiB (24.5MB), run=30439-31467msec WRITE: bw=801KiB/s (820kB/s), 197KiB/s-215KiB/s (202kB/s-220kB/s), io=24.6MiB (25.8MB), run=30439-31467msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179706: Thu Jun 11 23:39:40 2026 read: IOPS=8, BW=134KiB/s (137kB/s)(5920KiB/44154msec) clat (msec): min=7, max=308, avg=48.12, stdev=39.53 lat (msec): min=7, max=308, avg=48.12, stdev=39.53 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 14], 10.00th=[ 17], 20.00th=[ 23], | 30.00th=[ 26], 40.00th=[ 31], 50.00th=[ 35], 60.00th=[ 42], | 70.00th=[ 53], 80.00th=[ 65], 90.00th=[ 94], 95.00th=[ 136], | 99.00th=[ 199], 99.50th=[ 222], 99.90th=[ 309], 99.95th=[ 309], | 99.99th=[ 309] bw ( KiB/s): min= 31, max= 380, per=25.26%, avg=133.38, stdev=77.16, samples=86 iops : min= 1, max= 23, avg= 7.58, stdev= 4.87, samples=86 write: IOPS=9, BW=144KiB/s (148kB/s)(6368KiB/44154msec); 0 zone resets clat (msec): min=13, max=226, avg=65.90, stdev=38.01 lat (msec): min=13, max=226, avg=65.90, stdev=38.00 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 23], 10.00th=[ 29], 20.00th=[ 36], | 30.00th=[ 43], 40.00th=[ 49], 50.00th=[ 54], 60.00th=[ 64], | 70.00th=[ 77], 80.00th=[ 92], 90.00th=[ 117], 95.00th=[ 148], | 99.00th=[ 180], 99.50th=[ 207], 99.90th=[ 228], 99.95th=[ 228], | 99.99th=[ 228] bw ( KiB/s): min= 21, max= 344, per=26.03%, avg=144.49, stdev=70.65, samples=86 iops : min= 1, max= 21, avg= 8.28, stdev= 4.49, samples=86 lat (msec) : 10=0.52%, 20=8.33%, 50=47.40%, 100=30.60%, 250=13.02% lat (msec) : 500=0.13% cpu : usr=0.05%, sys=2.22%, ctx=1278, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179707: Thu Jun 11 23:39:40 2026 read: IOPS=7, BW=127KiB/s (130kB/s)(5744KiB/45135msec) clat (msec): min=6, max=197, avg=48.78, stdev=34.90 lat (msec): min=6, max=197, avg=48.78, stdev=34.90 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 16], 10.00th=[ 18], 20.00th=[ 23], | 30.00th=[ 27], 40.00th=[ 32], 50.00th=[ 39], 60.00th=[ 46], | 70.00th=[ 55], 80.00th=[ 68], 90.00th=[ 97], 95.00th=[ 129], | 99.00th=[ 171], 99.50th=[ 186], 99.90th=[ 197], 99.95th=[ 197], | 99.99th=[ 197] bw ( KiB/s): min= 21, max= 383, per=24.79%, avg=130.89, stdev=68.19, samples=85 iops : min= 1, max= 23, avg= 7.42, stdev= 4.30, samples=85 write: IOPS=9, BW=145KiB/s (148kB/s)(6544KiB/45135msec); 0 zone resets clat (msec): min=14, max=286, avg=67.24, stdev=40.20 lat (msec): min=14, max=286, avg=67.25, stdev=40.20 clat percentiles (msec): | 1.00th=[ 21], 5.00th=[ 27], 10.00th=[ 31], 20.00th=[ 36], | 30.00th=[ 43], 40.00th=[ 48], 50.00th=[ 56], 60.00th=[ 63], | 70.00th=[ 75], 80.00th=[ 91], 90.00th=[ 126], 95.00th=[ 153], | 99.00th=[ 197], 99.50th=[ 220], 99.90th=[ 288], 99.95th=[ 288], | 99.99th=[ 288] bw ( KiB/s): min= 31, max= 383, per=25.94%, avg=143.98, stdev=64.73, samples=88 iops : min= 1, max= 23, avg= 8.24, stdev= 4.13, samples=88 lat (msec) : 10=0.39%, 20=6.12%, 50=47.27%, 100=32.55%, 250=13.54% lat (msec) : 500=0.13% cpu : usr=0.04%, sys=1.95%, ctx=1184, 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=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=179708: Thu Jun 11 23:39:40 2026 read: IOPS=8, BW=140KiB/s (144kB/s)(6256KiB/44638msec) clat (msec): min=8, max=274, avg=48.93, stdev=35.36 lat (msec): min=8, max=274, avg=48.93, stdev=35.36 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 15], 10.00th=[ 18], 20.00th=[ 22], | 30.00th=[ 28], 40.00th=[ 32], 50.00th=[ 37], 60.00th=[ 46], | 70.00th=[ 57], 80.00th=[ 71], 90.00th=[ 96], 95.00th=[ 122], | 99.00th=[ 169], 99.50th=[ 218], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 31, max= 352, per=26.71%, avg=141.02, stdev=74.34, samples=87 iops : min= 1, max= 22, avg= 8.07, stdev= 4.73, samples=87 write: IOPS=8, BW=135KiB/s (138kB/s)(6032KiB/44638msec); 0 zone resets clat (msec): min=17, max=287, avg=67.36, stdev=41.96 lat (msec): min=17, max=287, avg=67.36, stdev=41.96 clat percentiles (msec): | 1.00th=[ 21], 5.00th=[ 27], 10.00th=[ 31], 20.00th=[ 36], | 30.00th=[ 42], 40.00th=[ 48], 50.00th=[ 54], 60.00th=[ 64], | 70.00th=[ 78], 80.00th=[ 94], 90.00th=[ 125], 95.00th=[ 153], | 99.00th=[ 226], 99.50th=[ 232], 99.90th=[ 288], 99.95th=[ 288], | 99.99th=[ 288] bw ( KiB/s): min= 30, max= 351, per=24.38%, avg=135.33, stdev=61.55, samples=86 iops : min= 1, max= 21, avg= 7.70, stdev= 3.87, samples=86 lat (msec) : 10=0.52%, 20=7.81%, 50=45.18%, 100=34.24%, 250=11.98% lat (msec) : 500=0.26% cpu : usr=0.04%, sys=2.15%, ctx=1251, 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=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=179709: Thu Jun 11 23:39:40 2026 read: IOPS=8, BW=133KiB/s (136kB/s)(6032KiB/45360msec) clat (msec): min=7, max=277, avg=49.40, stdev=38.81 lat (msec): min=7, max=277, avg=49.41, stdev=38.82 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 14], 10.00th=[ 17], 20.00th=[ 23], | 30.00th=[ 26], 40.00th=[ 31], 50.00th=[ 36], 60.00th=[ 44], | 70.00th=[ 55], 80.00th=[ 69], 90.00th=[ 101], 95.00th=[ 138], | 99.00th=[ 176], 99.50th=[ 192], 99.90th=[ 279], 99.95th=[ 279], | 99.99th=[ 279] bw ( KiB/s): min= 30, max= 380, per=25.31%, avg=133.65, stdev=70.10, samples=88 iops : min= 1, max= 23, avg= 7.59, stdev= 4.44, samples=88 write: IOPS=8, BW=138KiB/s (141kB/s)(6256KiB/45360msec); 0 zone resets clat (msec): min=11, max=258, avg=68.11, stdev=39.95 lat (msec): min=11, max=258, avg=68.11, stdev=39.95 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 27], 10.00th=[ 31], 20.00th=[ 37], | 30.00th=[ 44], 40.00th=[ 51], 50.00th=[ 58], 60.00th=[ 68], | 70.00th=[ 78], 80.00th=[ 92], 90.00th=[ 118], 95.00th=[ 153], | 99.00th=[ 220], 99.50th=[ 251], 99.90th=[ 259], 99.95th=[ 259], | 99.99th=[ 259] bw ( KiB/s): min= 29, max= 319, per=24.83%, avg=137.83, stdev=66.24, samples=89 iops : min= 1, max= 19, avg= 7.85, stdev= 4.18, samples=89 lat (msec) : 10=0.65%, 20=7.55%, 50=44.27%, 100=34.77%, 250=12.37% lat (msec) : 500=0.39% cpu : usr=0.04%, sys=2.09%, ctx=1213, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=528KiB/s (541kB/s), 127KiB/s-140KiB/s (130kB/s-144kB/s), io=23.4MiB (24.5MB), run=44154-45360msec WRITE: bw=556KiB/s (569kB/s), 135KiB/s-145KiB/s (138kB/s-148kB/s), io=24.6MiB (25.8MB), run=44154-45360msec 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=179722: Thu Jun 11 23:39:57 2026 read: IOPS=1, BW=1542KiB/s (1579kB/s)(7168KiB/4648msec) clat (usec): min=816, max=376397, avg=279694.81, stdev=134169.82 lat (usec): min=818, max=376399, avg=279696.25, stdev=134169.69 clat percentiles (usec): | 1.00th=[ 816], 5.00th=[ 816], 10.00th=[ 816], 20.00th=[238027], | 30.00th=[267387], 40.00th=[267387], 50.00th=[350225], 60.00th=[362808], | 70.00th=[362808], 80.00th=[362808], 90.00th=[375391], 95.00th=[375391], | 99.00th=[375391], 99.50th=[375391], 99.90th=[375391], 99.95th=[375391], | 99.99th=[375391] bw ( KiB/s): min= 1892, max= 4055, per=62.44%, avg=2375.80, stdev=941.09, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 write: IOPS=1, BW=1102KiB/s (1128kB/s)(5120KiB/4648msec); 0 zone resets clat (msec): min=246, max=1027, avg=455.07, stdev=330.78 lat (msec): min=246, max=1027, avg=455.15, stdev=330.77 clat percentiles (msec): | 1.00th=[ 247], 5.00th=[ 247], 10.00th=[ 247], 20.00th=[ 247], | 30.00th=[ 253], 40.00th=[ 253], 50.00th=[ 296], 60.00th=[ 296], | 70.00th=[ 456], 80.00th=[ 456], 90.00th=[ 1028], 95.00th=[ 1028], | 99.00th=[ 1028], 99.50th=[ 1028], 99.90th=[ 1028], 99.95th=[ 1028], | 99.99th=[ 1028] bw ( KiB/s): min= 1928, max= 4096, per=50.16%, avg=2672.00, stdev=1233.64, samples=3 iops : min= 1, max= 4, avg= 2.00, stdev= 1.73, samples=3 lat (usec) : 1000=8.33% lat (msec) : 250=16.67%, 500=66.67%, 2000=8.33% cpu : usr=0.00%, sys=9.71%, ctx=217, 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=179723: Thu Jun 11 23:39:57 2026 read: IOPS=0, BW=381KiB/s (390kB/s)(2048KiB/5382msec) clat (usec): min=513, max=263650, avg=132081.90, stdev=186066.00 lat (usec): min=514, max=263652, avg=132083.93, stdev=186066.56 clat percentiles (usec): | 1.00th=[ 515], 5.00th=[ 515], 10.00th=[ 515], 20.00th=[ 515], | 30.00th=[ 515], 40.00th=[ 515], 50.00th=[ 515], 60.00th=[263193], | 70.00th=[263193], 80.00th=[263193], 90.00th=[263193], 95.00th=[263193], | 99.00th=[263193], 99.50th=[263193], 99.90th=[263193], 99.95th=[263193], | 99.99th=[263193] bw ( KiB/s): min= 1805, max= 1914, per=48.87%, avg=1859.50, stdev=77.07, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1903KiB/s (1948kB/s)(10.0MiB/5382msec); 0 zone resets clat (msec): min=161, max=1254, avg=505.36, stdev=413.55 lat (msec): min=161, max=1254, avg=505.42, stdev=413.56 clat percentiles (msec): | 1.00th=[ 161], 5.00th=[ 161], 10.00th=[ 161], 20.00th=[ 163], | 30.00th=[ 215], 40.00th=[ 247], 50.00th=[ 351], 60.00th=[ 405], | 70.00th=[ 489], 80.00th=[ 518], 90.00th=[ 1250], 95.00th=[ 1250], | 99.00th=[ 1250], 99.50th=[ 1250], 99.90th=[ 1250], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 1889, max= 3992, per=46.73%, avg=2489.57, stdev=958.63, samples=7 iops : min= 1, max= 3, avg= 1.57, stdev= 0.98, samples=7 lat (usec) : 750=8.33% lat (msec) : 250=33.33%, 500=33.33%, 750=8.33%, 2000=16.67% cpu : usr=0.00%, sys=9.20%, ctx=144, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179724: Thu Jun 11 23:39:57 2026 read: IOPS=1, BW=1268KiB/s (1299kB/s)(6144KiB/4845msec) clat (usec): min=481, max=505142, avg=225796.54, stdev=203367.17 lat (usec): min=482, max=505143, avg=225797.89, stdev=203367.16 clat percentiles (usec): | 1.00th=[ 482], 5.00th=[ 482], 10.00th=[ 482], 20.00th=[ 2999], | 30.00th=[ 2999], 40.00th=[177210], 50.00th=[177210], 60.00th=[299893], | 70.00th=[367002], 80.00th=[367002], 90.00th=[505414], 95.00th=[505414], | 99.00th=[505414], 99.50th=[505414], 99.90th=[505414], 99.95th=[505414], | 99.99th=[505414] bw ( KiB/s): min= 1914, max= 3785, per=63.57%, avg=2418.75, stdev=912.82, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=1, BW=1268KiB/s (1299kB/s)(6144KiB/4845msec); 0 zone resets clat (msec): min=186, max=914, avg=547.99, stdev=322.81 lat (msec): min=187, max=914, avg=548.23, stdev=322.70 clat percentiles (msec): | 1.00th=[ 188], 5.00th=[ 188], 10.00th=[ 188], 20.00th=[ 292], | 30.00th=[ 292], 40.00th=[ 317], 50.00th=[ 317], 60.00th=[ 693], | 70.00th=[ 885], 80.00th=[ 885], 90.00th=[ 919], 95.00th=[ 919], | 99.00th=[ 919], 99.50th=[ 919], 99.90th=[ 919], 99.95th=[ 919], | 99.99th=[ 919] bw ( KiB/s): min= 1892, max= 4055, per=45.94%, avg=2447.25, stdev=1071.94, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (usec) : 500=8.33% lat (msec) : 4=8.33%, 250=16.67%, 500=33.33%, 750=16.67%, 1000=16.67% cpu : usr=0.02%, sys=5.72%, ctx=202, 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=179728: Thu Jun 11 23:39:57 2026 read: IOPS=1, BW=1125KiB/s (1152kB/s)(5120KiB/4553msec) clat (usec): min=352, max=430409, avg=126010.19, stdev=190558.54 lat (usec): min=354, max=430410, avg=126011.35, stdev=190558.64 clat percentiles (usec): | 1.00th=[ 355], 5.00th=[ 355], 10.00th=[ 355], 20.00th=[ 355], | 30.00th=[ 355], 40.00th=[ 355], 50.00th=[ 465], 60.00th=[ 465], | 70.00th=[198181], 80.00th=[198181], 90.00th=[429917], 95.00th=[429917], | 99.00th=[429917], 99.50th=[429917], 99.90th=[429917], 99.95th=[429917], | 99.99th=[429917] bw ( KiB/s): min= 1838, max= 5626, per=98.08%, avg=3732.00, stdev=2678.52, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1574KiB/s (1612kB/s)(7168KiB/4553msec); 0 zone resets clat (msec): min=190, max=743, avg=547.96, stdev=219.06 lat (msec): min=190, max=744, avg=548.78, stdev=219.73 clat percentiles (msec): | 1.00th=[ 190], 5.00th=[ 190], 10.00th=[ 190], 20.00th=[ 321], | 30.00th=[ 502], 40.00th=[ 502], 50.00th=[ 634], 60.00th=[ 718], | 70.00th=[ 718], 80.00th=[ 726], 90.00th=[ 743], 95.00th=[ 743], | 99.00th=[ 743], 99.50th=[ 743], 99.90th=[ 743], 99.95th=[ 743], | 99.99th=[ 743] bw ( KiB/s): min= 1838, max= 3976, per=43.96%, avg=2341.80, stdev=916.47, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (usec) : 500=25.00% lat (msec) : 250=16.67%, 500=16.67%, 750=41.67% cpu : usr=0.00%, sys=7.89%, ctx=129, 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=3805KiB/s (3897kB/s), 381KiB/s-1542KiB/s (390kB/s-1579kB/s), io=20.0MiB (20.0MB), run=4553-5382msec WRITE: bw=5327KiB/s (5455kB/s), 1102KiB/s-1903KiB/s (1128kB/s-1948kB/s), io=28.0MiB (29.4MB), run=4553-5382msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179725: Thu Jun 11 23:39:58 2026 read: IOPS=1, BW=1785KiB/s (1828kB/s)(7168KiB/4015msec) clat (msec): min=133, max=303, avg=208.49, stdev=52.07 lat (msec): min=133, max=303, avg=208.49, stdev=52.07 clat percentiles (msec): | 1.00th=[ 134], 5.00th=[ 134], 10.00th=[ 134], 20.00th=[ 182], | 30.00th=[ 197], 40.00th=[ 197], 50.00th=[ 203], 60.00th=[ 207], | 70.00th=[ 207], 80.00th=[ 236], 90.00th=[ 305], 95.00th=[ 305], | 99.00th=[ 305], 99.50th=[ 305], 99.90th=[ 305], 99.95th=[ 305], | 99.99th=[ 305] bw ( KiB/s): min= 2023, max= 3976, per=87.02%, avg=2843.00, stdev=978.94, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=1, BW=1275KiB/s (1306kB/s)(5120KiB/4015msec); 0 zone resets clat (msec): min=252, max=685, avg=485.41, stdev=196.04 lat (msec): min=252, max=685, avg=486.20, stdev=196.00 clat percentiles (msec): | 1.00th=[ 253], 5.00th=[ 253], 10.00th=[ 253], 20.00th=[ 253], | 30.00th=[ 334], 40.00th=[ 334], 50.00th=[ 481], 60.00th=[ 481], | 70.00th=[ 676], 80.00th=[ 676], 90.00th=[ 684], 95.00th=[ 684], | 99.00th=[ 684], 99.50th=[ 684], 99.90th=[ 684], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 1988, max= 4071, per=58.70%, avg=2685.00, stdev=1200.32, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 250=50.00%, 500=33.33%, 750=16.67% cpu : usr=0.00%, sys=2.42%, ctx=63, 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=179726: Thu Jun 11 23:39:58 2026 read: IOPS=0, BW=330KiB/s (338kB/s)(2048KiB/6203msec) clat (msec): min=218, max=483, avg=350.75, stdev=187.25 lat (msec): min=218, max=483, avg=350.76, stdev=187.25 clat percentiles (msec): | 1.00th=[ 220], 5.00th=[ 220], 10.00th=[ 220], 20.00th=[ 220], | 30.00th=[ 220], 40.00th=[ 220], 50.00th=[ 220], 60.00th=[ 485], | 70.00th=[ 485], 80.00th=[ 485], 90.00th=[ 485], 95.00th=[ 485], | 99.00th=[ 485], 99.50th=[ 485], 99.90th=[ 485], 99.95th=[ 485], | 99.99th=[ 485] bw ( KiB/s): min= 1774, max= 1988, per=57.58%, avg=1881.00, stdev=151.32, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1651KiB/s (1690kB/s)(10.0MiB/6203msec); 0 zone resets clat (msec): min=136, max=1626, avg=529.29, stdev=443.65 lat (msec): min=136, max=1626, avg=529.39, stdev=443.66 clat percentiles (msec): | 1.00th=[ 138], 5.00th=[ 138], 10.00th=[ 138], 20.00th=[ 192], | 30.00th=[ 197], 40.00th=[ 205], 50.00th=[ 397], 60.00th=[ 558], | 70.00th=[ 567], 80.00th=[ 701], 90.00th=[ 718], 95.00th=[ 1620], | 99.00th=[ 1620], 99.50th=[ 1620], 99.90th=[ 1620], 99.95th=[ 1620], | 99.99th=[ 1620] bw ( KiB/s): min= 1946, max= 4055, per=51.33%, avg=2347.67, stdev=837.08, samples=6 iops : min= 1, max= 3, avg= 1.33, stdev= 0.82, samples=6 lat (msec) : 250=41.67%, 500=16.67%, 750=33.33%, 2000=8.33% cpu : usr=0.00%, sys=3.55%, ctx=98, 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=179727: Thu Jun 11 23:39:58 2026 read: IOPS=1, BW=1050KiB/s (1075kB/s)(6144KiB/5850msec) clat (msec): min=115, max=703, avg=308.77, stdev=239.86 lat (msec): min=115, max=703, avg=308.78, stdev=239.86 clat percentiles (msec): | 1.00th=[ 116], 5.00th=[ 116], 10.00th=[ 116], 20.00th=[ 146], | 30.00th=[ 146], 40.00th=[ 150], 50.00th=[ 150], 60.00th=[ 239], | 70.00th=[ 502], 80.00th=[ 502], 90.00th=[ 701], 95.00th=[ 701], | 99.00th=[ 701], 99.50th=[ 701], 99.90th=[ 701], 99.95th=[ 701], | 99.99th=[ 701] bw ( KiB/s): min= 1946, max= 2039, per=61.43%, avg=2007.00, stdev=39.65, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 write: IOPS=1, BW=1050KiB/s (1075kB/s)(6144KiB/5850msec); 0 zone resets clat (msec): min=114, max=970, avg=603.09, stdev=343.25 lat (msec): min=114, max=970, avg=603.17, stdev=343.27 clat percentiles (msec): | 1.00th=[ 114], 5.00th=[ 114], 10.00th=[ 114], 20.00th=[ 321], | 30.00th=[ 321], 40.00th=[ 531], 50.00th=[ 531], 60.00th=[ 743], | 70.00th=[ 936], 80.00th=[ 936], 90.00th=[ 969], 95.00th=[ 969], | 99.00th=[ 969], 99.50th=[ 969], 99.90th=[ 969], 99.95th=[ 969], | 99.99th=[ 969] bw ( KiB/s): min= 1675, max= 4079, per=51.44%, avg=2353.00, stdev=975.41, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 250=41.67%, 500=8.33%, 750=33.33%, 1000=16.67% cpu : usr=0.02%, sys=3.13%, ctx=98, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179729: Thu Jun 11 23:39:58 2026 read: IOPS=0, BW=817KiB/s (836kB/s)(5120KiB/6268msec) clat (msec): min=89, max=675, avg=318.13, stdev=301.77 lat (msec): min=89, max=675, avg=318.13, stdev=301.77 clat percentiles (msec): | 1.00th=[ 90], 5.00th=[ 90], 10.00th=[ 90], 20.00th=[ 90], | 30.00th=[ 101], 40.00th=[ 101], 50.00th=[ 105], 60.00th=[ 105], | 70.00th=[ 625], 80.00th=[ 625], 90.00th=[ 676], 95.00th=[ 676], | 99.00th=[ 676], 99.50th=[ 676], 99.90th=[ 676], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 1961, max= 4015, per=81.61%, avg=2666.33, stdev=1168.39, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1144KiB/s (1171kB/s)(7168KiB/6268msec); 0 zone resets clat (msec): min=138, max=1284, avg=618.82, stdev=486.03 lat (msec): min=138, max=1284, avg=618.91, stdev=486.04 clat percentiles (msec): | 1.00th=[ 140], 5.00th=[ 140], 10.00th=[ 140], 20.00th=[ 155], | 30.00th=[ 211], 40.00th=[ 211], 50.00th=[ 498], 60.00th=[ 919], | 70.00th=[ 919], 80.00th=[ 1133], 90.00th=[ 1284], 95.00th=[ 1284], | 99.00th=[ 1284], 99.50th=[ 1284], 99.90th=[ 1284], 99.95th=[ 1284], | 99.99th=[ 1284] bw ( KiB/s): min= 1793, max= 4047, per=51.14%, avg=2339.20, stdev=959.61, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 100=8.33%, 250=41.67%, 500=8.33%, 750=16.67%, 1000=8.33% lat (msec) : 2000=16.67% cpu : usr=0.00%, sys=3.91%, ctx=109, 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=3267KiB/s (3346kB/s), 330KiB/s-1785KiB/s (338kB/s-1828kB/s), io=20.0MiB (20.0MB), run=4015-6268msec WRITE: bw=4574KiB/s (4684kB/s), 1050KiB/s-1651KiB/s (1075kB/s-1690kB/s), io=28.0MiB (29.4MB), run=4015-6268msec 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=179736: Thu Jun 11 23:40:10 2026 read: IOPS=1, BW=4813KiB/s (4929kB/s)(12.0MiB/2553msec) clat (msec): min=802, max=838, avg=821.30, stdev=18.09 lat (msec): min=802, max=838, avg=821.30, stdev=18.09 clat percentiles (msec): | 1.00th=[ 802], 5.00th=[ 802], 10.00th=[ 802], 20.00th=[ 802], | 30.00th=[ 802], 40.00th=[ 827], 50.00th=[ 827], 60.00th=[ 827], | 70.00th=[ 835], 80.00th=[ 835], 90.00th=[ 835], 95.00th=[ 835], | 99.00th=[ 835], 99.50th=[ 835], 99.90th=[ 835], 99.95th=[ 835], | 99.99th=[ 835] bw ( KiB/s): min= 8192, max= 8192, per=100.00%, avg=8192.00, stdev= 0.00, samples=2 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=2 lat (msec) : 1000=100.00% cpu : usr=0.00%, sys=12.97%, ctx=362, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179737: Thu Jun 11 23:40:10 2026 read: IOPS=0, BW=1177KiB/s (1205kB/s)(4096KiB/3480msec) clat (nsec): min=801030k, max=801030k, avg=801029773.00, stdev= 0.00 lat (nsec): min=801032k, max=801032k, avg=801031859.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 802], 5.00th=[ 802], 10.00th=[ 802], 20.00th=[ 802], | 30.00th=[ 802], 40.00th=[ 802], 50.00th=[ 802], 60.00th=[ 802], | 70.00th=[ 802], 80.00th=[ 802], 90.00th=[ 802], 95.00th=[ 802], | 99.00th=[ 802], 99.50th=[ 802], 99.90th=[ 802], 99.95th=[ 802], | 99.99th=[ 802] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2354KiB/s (2411kB/s)(8192KiB/3480msec); 0 zone resets clat (msec): min=1249, max=1375, avg=1312.44, stdev=88.93 lat (msec): min=1249, max=1375, avg=1312.76, stdev=89.01 clat percentiles (msec): | 1.00th=[ 1250], 5.00th=[ 1250], 10.00th=[ 1250], 20.00th=[ 1250], | 30.00th=[ 1250], 40.00th=[ 1250], 50.00th=[ 1250], 60.00th=[ 1368], | 70.00th=[ 1368], 80.00th=[ 1368], 90.00th=[ 1368], 95.00th=[ 1368], | 99.00th=[ 1368], 99.50th=[ 1368], 99.90th=[ 1368], 99.95th=[ 1368], | 99.99th=[ 1368] bw ( KiB/s): min= 8126, max= 8126, per=86.30%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.56%, ctx=87, 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=179738: Thu Jun 11 23:40:10 2026 write: IOPS=0, BW=3882KiB/s (3976kB/s)(12.0MiB/3165msec); 0 zone resets clat (msec): min=454, max=1614, avg=1029.76, stdev=579.86 lat (msec): min=455, max=1614, avg=1030.13, stdev=579.82 clat percentiles (msec): | 1.00th=[ 456], 5.00th=[ 456], 10.00th=[ 456], 20.00th=[ 456], | 30.00th=[ 456], 40.00th=[ 1020], 50.00th=[ 1020], 60.00th=[ 1020], | 70.00th=[ 1620], 80.00th=[ 1620], 90.00th=[ 1620], 95.00th=[ 1620], | 99.00th=[ 1620], 99.50th=[ 1620], 99.90th=[ 1620], 99.95th=[ 1620], | 99.99th=[ 1620] bw ( KiB/s): min= 8143, max= 8143, per=86.48%, avg=8143.00, stdev= 0.00, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.03%, sys=6.38%, ctx=82, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179739: Thu Jun 11 23:40:10 2026 write: IOPS=1, BW=4133KiB/s (4232kB/s)(12.0MiB/2973msec); 0 zone resets clat (msec): min=199, max=2041, avg=968.44, stdev=958.00 lat (msec): min=200, max=2041, avg=968.77, stdev=957.85 clat percentiles (msec): | 1.00th=[ 201], 5.00th=[ 201], 10.00th=[ 201], 20.00th=[ 201], | 30.00th=[ 201], 40.00th=[ 667], 50.00th=[ 667], 60.00th=[ 667], | 70.00th=[ 2039], 80.00th=[ 2039], 90.00th=[ 2039], 95.00th=[ 2039], | 99.00th=[ 2039], 99.50th=[ 2039], 99.90th=[ 2039], 99.95th=[ 2039], | 99.99th=[ 2039] bw ( KiB/s): min= 5572, max= 8143, per=72.83%, avg=6857.50, stdev=1817.97, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 750=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.96%, ctx=39, 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=4708KiB/s (4821kB/s), 1177KiB/s-4813KiB/s (1205kB/s-4929kB/s), io=16.0MiB (16.8MB), run=2553-3480msec WRITE: bw=9416KiB/s (9642kB/s), 2354KiB/s-4133KiB/s (2411kB/s-4232kB/s), io=32.0MiB (33.6MB), run=2973-3480msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179741: Thu Jun 11 23:40:10 2026 read: IOPS=0, BW=3730KiB/s (3820kB/s)(12.0MiB/3294msec) clat (msec): min=610, max=1640, avg=1096.98, stdev=517.53 lat (msec): min=610, max=1640, avg=1096.98, stdev=517.53 clat percentiles (msec): | 1.00th=[ 609], 5.00th=[ 609], 10.00th=[ 609], 20.00th=[ 609], | 30.00th=[ 609], 40.00th=[ 1036], 50.00th=[ 1036], 60.00th=[ 1036], | 70.00th=[ 1636], 80.00th=[ 1636], 90.00th=[ 1636], 95.00th=[ 1636], | 99.00th=[ 1636], 99.50th=[ 1636], 99.90th=[ 1636], 99.95th=[ 1636], | 99.99th=[ 1636] bw ( KiB/s): min= 7953, max= 8094, per=100.00%, avg=8023.50, stdev=99.70, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.40%, ctx=50, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179742: Thu Jun 11 23:40:10 2026 read: IOPS=0, BW=1269KiB/s (1300kB/s)(4096KiB/3227msec) clat (nsec): min=1982.2M, max=1982.2M, avg=1982226360.00, stdev= 0.00 lat (nsec): min=1982.2M, max=1982.2M, avg=1982228860.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1989], 5.00th=[ 1989], 10.00th=[ 1989], 20.00th=[ 1989], | 30.00th=[ 1989], 40.00th=[ 1989], 50.00th=[ 1989], 60.00th=[ 1989], | 70.00th=[ 1989], 80.00th=[ 1989], 90.00th=[ 1989], 95.00th=[ 1989], | 99.00th=[ 1989], 99.50th=[ 1989], 99.90th=[ 1989], 99.95th=[ 1989], | 99.99th=[ 1989] bw ( KiB/s): min= 8126, max= 8126, per=100.00%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2539KiB/s (2600kB/s)(8192KiB/3227msec); 0 zone resets clat (msec): min=355, max=885, avg=620.37, stdev=374.93 lat (msec): min=355, max=886, avg=621.29, stdev=375.73 clat percentiles (msec): | 1.00th=[ 355], 5.00th=[ 355], 10.00th=[ 355], 20.00th=[ 355], | 30.00th=[ 355], 40.00th=[ 355], 50.00th=[ 355], 60.00th=[ 885], | 70.00th=[ 885], 80.00th=[ 885], 90.00th=[ 885], 95.00th=[ 885], | 99.00th=[ 885], 99.50th=[ 885], 99.90th=[ 885], 99.95th=[ 885], | 99.99th=[ 885] bw ( KiB/s): min= 7953, max= 7953, per=78.32%, avg=7953.00, 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=2.73%, ctx=50, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179743: Thu Jun 11 23:40:10 2026 write: IOPS=1, BW=4117KiB/s (4215kB/s)(12.0MiB/2985msec); 0 zone resets clat (msec): min=543, max=1328, avg=993.92, stdev=405.49 lat (msec): min=543, max=1329, avg=994.72, stdev=405.70 clat percentiles (msec): | 1.00th=[ 542], 5.00th=[ 542], 10.00th=[ 542], 20.00th=[ 542], | 30.00th=[ 542], 40.00th=[ 1116], 50.00th=[ 1116], 60.00th=[ 1116], | 70.00th=[ 1334], 80.00th=[ 1334], 90.00th=[ 1334], 95.00th=[ 1334], | 99.00th=[ 1334], 99.50th=[ 1334], 99.90th=[ 1334], 99.95th=[ 1334], | 99.99th=[ 1334] bw ( KiB/s): min= 7953, max= 8094, per=79.02%, avg=8023.50, stdev=99.70, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.03%, sys=3.69%, ctx=53, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179744: Thu Jun 11 23:40:10 2026 write: IOPS=1, BW=4407KiB/s (4513kB/s)(12.0MiB/2788msec); 0 zone resets clat (msec): min=859, max=1060, avg=927.90, stdev=114.62 lat (msec): min=859, max=1060, avg=928.89, stdev=114.13 clat percentiles (msec): | 1.00th=[ 860], 5.00th=[ 860], 10.00th=[ 860], 20.00th=[ 860], | 30.00th=[ 860], 40.00th=[ 869], 50.00th=[ 869], 60.00th=[ 869], | 70.00th=[ 1062], 80.00th=[ 1062], 90.00th=[ 1062], 95.00th=[ 1062], | 99.00th=[ 1062], 99.50th=[ 1062], 99.90th=[ 1062], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 8094, max= 8126, per=79.87%, avg=8110.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=66.67%, 2000=33.33% cpu : usr=0.11%, sys=4.49%, ctx=45, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=4974KiB/s (5093kB/s), 1269KiB/s-3730KiB/s (1300kB/s-3820kB/s), io=16.0MiB (16.8MB), run=3227-3294msec WRITE: bw=9.92MiB/s (10.4MB/s), 2539KiB/s-4407KiB/s (2600kB/s-4513kB/s), io=32.0MiB (33.6MB), run=2788-3227msec