== sanity test 398b: DIO and buffer IO race ============== 11:49:39 (1786636179) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.16332 s, 8.2 MB/s mix direct rw 4096 by fio with 4 jobs... mix buffer rw 4096 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=144907: Thu Aug 13 11:52:14 2026 read: IOPS=11, BW=44.5KiB/s (45.6kB/s)(5992KiB/134558msec) clat (usec): min=32, max=1228.6k, avg=45205.49, stdev=44958.03 lat (usec): min=33, max=1228.6k, avg=45209.52, stdev=44956.98 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 69], 10.00th=[ 12125], | 20.00th=[ 22414], 30.00th=[ 27395], 40.00th=[ 32900], | 50.00th=[ 37487], 60.00th=[ 44827], 70.00th=[ 53216], | 80.00th=[ 65799], 90.00th=[ 82314], 95.00th=[ 99091], | 99.00th=[ 160433], 99.50th=[ 204473], 99.90th=[ 387974], | 99.95th=[1233126], 99.99th=[1233126] bw ( KiB/s): min= 5, max= 103, per=25.63%, avg=45.10, stdev=18.99, samples=259 iops : min= 1, max= 25, avg=10.64, stdev= 4.78, samples=259 write: IOPS=11, BW=46.8KiB/s (47.9kB/s)(6296KiB/134558msec); 0 zone resets clat (usec): min=945, max=444815, avg=42151.95, stdev=42990.54 lat (usec): min=947, max=444817, avg=42156.38, stdev=42989.03 clat percentiles (usec): | 1.00th=[ 1369], 5.00th=[ 1532], 10.00th=[ 2212], 20.00th=[ 5407], | 30.00th=[ 10814], 40.00th=[ 20055], 50.00th=[ 31327], 60.00th=[ 42730], | 70.00th=[ 55837], 80.00th=[ 71828], 90.00th=[ 98042], 95.00th=[122160], | 99.00th=[189793], 99.50th=[217056], 99.90th=[329253], 99.95th=[446694], | 99.99th=[446694] bw ( KiB/s): min= 7, max= 111, per=25.51%, avg=46.94, stdev=19.18, samples=261 iops : min= 1, max= 27, avg=11.11, stdev= 4.82, samples=261 lat (usec) : 50=0.39%, 100=3.39%, 250=0.39%, 500=0.13%, 750=0.07% lat (usec) : 1000=0.03% lat (msec) : 2=4.65%, 4=3.32%, 10=7.10%, 20=9.24%, 50=37.43% lat (msec) : 100=26.76%, 250=6.84%, 500=0.23%, 2000=0.03% cpu : usr=0.08%, sys=5.09%, ctx=6798, majf=0, minf=19 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144908: Thu Aug 13 11:52:14 2026 read: IOPS=11, BW=44.0KiB/s (46.1kB/s)(5940KiB/132010msec) clat (usec): min=37, max=512396, avg=44512.09, stdev=34859.19 lat (usec): min=37, max=512397, avg=44517.96, stdev=34864.94 clat percentiles (usec): | 1.00th=[ 57], 5.00th=[ 70], 10.00th=[ 12387], 20.00th=[ 21103], | 30.00th=[ 27395], 40.00th=[ 32900], 50.00th=[ 38011], 60.00th=[ 45351], | 70.00th=[ 53740], 80.00th=[ 64750], 90.00th=[ 81265], 95.00th=[ 96994], | 99.00th=[160433], 99.50th=[208667], 99.90th=[404751], 99.95th=[513803], | 99.99th=[513803] bw ( KiB/s): min= 5, max= 108, per=25.63%, avg=45.11, stdev=19.60, samples=257 iops : min= 1, max= 27, avg=10.65, stdev= 4.95, samples=257 write: IOPS=12, BW=48.1KiB/s (49.2kB/s)(6348KiB/132010msec); 0 zone resets clat (usec): min=995, max=1181.8k, avg=41267.44, stdev=50739.08 lat (usec): min=997, max=1181.8k, avg=41269.81, stdev=50739.44 clat percentiles (usec): | 1.00th=[ 1319], 5.00th=[ 1532], 10.00th=[ 2147], | 20.00th=[ 5080], 30.00th=[ 9372], 40.00th=[ 18220], | 50.00th=[ 29754], 60.00th=[ 39584], 70.00th=[ 52167], | 80.00th=[ 68682], 90.00th=[ 96994], 95.00th=[ 123208], | 99.00th=[ 185598], 99.50th=[ 225444], 99.90th=[ 291505], | 99.95th=[1182794], 99.99th=[1182794] bw ( KiB/s): min= 7, max= 119, per=26.15%, avg=48.11, stdev=20.40, samples=257 iops : min= 1, max= 29, avg=11.40, stdev= 5.13, samples=257 lat (usec) : 50=0.20%, 100=3.39%, 250=0.49%, 500=0.23%, 750=0.03% lat (usec) : 1000=0.03% lat (msec) : 2=4.62%, 4=4.26%, 10=7.62%, 20=9.38%, 50=36.91% lat (msec) : 100=25.91%, 250=6.64%, 500=0.23%, 750=0.03%, 2000=0.03% cpu : usr=0.09%, sys=5.32%, ctx=6852, majf=0, minf=20 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144909: Thu Aug 13 11:52:14 2026 read: IOPS=11, BW=44.2KiB/s (45.3kB/s)(6028KiB/136300msec) clat (usec): min=31, max=301212, avg=44619.96, stdev=32766.02 lat (usec): min=31, max=301214, avg=44625.64, stdev=32762.63 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 72], 10.00th=[ 13829], 20.00th=[ 21890], | 30.00th=[ 27132], 40.00th=[ 32375], 50.00th=[ 38536], 60.00th=[ 44303], | 70.00th=[ 53216], 80.00th=[ 64226], 90.00th=[ 83362], 95.00th=[100140], | 99.00th=[152044], 99.50th=[196084], 99.90th=[287310], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 7, max= 110, per=25.34%, avg=44.61, stdev=19.75, samples=264 iops : min= 1, max= 27, avg=10.52, stdev= 4.99, samples=264 write: IOPS=11, BW=45.9KiB/s (47.0kB/s)(6260KiB/136300msec); 0 zone resets clat (usec): min=995, max=1118.7k, avg=43829.25, stdev=51853.71 lat (usec): min=995, max=1118.7k, avg=43841.08, stdev=51848.28 clat percentiles (usec): | 1.00th=[ 1319], 5.00th=[ 1532], 10.00th=[ 2008], | 20.00th=[ 5145], 30.00th=[ 10945], 40.00th=[ 22152], | 50.00th=[ 31851], 60.00th=[ 43254], 70.00th=[ 57934], | 80.00th=[ 77071], 90.00th=[ 98042], 95.00th=[ 119014], | 99.00th=[ 179307], 99.50th=[ 212861], 99.90th=[ 683672], | 99.95th=[1115685], 99.99th=[1115685] bw ( KiB/s): min= 7, max= 117, per=24.99%, avg=45.98, stdev=19.13, samples=266 iops : min= 1, max= 29, avg=10.86, stdev= 4.83, samples=266 lat (usec) : 50=0.29%, 100=3.12%, 250=0.39%, 500=0.07%, 750=0.10% lat (usec) : 1000=0.16% lat (msec) : 2=5.01%, 4=3.84%, 10=5.99%, 20=8.76%, 50=37.83% lat (msec) : 100=27.02%, 250=7.23%, 500=0.13%, 750=0.03%, 2000=0.03% cpu : usr=0.07%, sys=5.18%, ctx=6873, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144910: Thu Aug 13 11:52:14 2026 read: IOPS=11, BW=44.6KiB/s (45.7kB/s)(6052KiB/135667msec) clat (usec): min=34, max=435649, avg=44321.95, stdev=31124.44 lat (usec): min=34, max=435650, avg=44324.63, stdev=31124.29 clat percentiles (usec): | 1.00th=[ 57], 5.00th=[ 68], 10.00th=[ 13042], 20.00th=[ 21890], | 30.00th=[ 27395], 40.00th=[ 33424], 50.00th=[ 39060], 60.00th=[ 46400], | 70.00th=[ 54264], 80.00th=[ 64750], 90.00th=[ 82314], 95.00th=[ 99091], | 99.00th=[137364], 99.50th=[156238], 99.90th=[208667], 99.95th=[434111], | 99.99th=[434111] bw ( KiB/s): min= 7, max= 103, per=25.26%, avg=44.45, stdev=17.99, samples=264 iops : min= 1, max= 25, avg=10.48, stdev= 4.54, samples=264 write: IOPS=11, BW=45.0KiB/s (47.1kB/s)(6236KiB/135667msec); 0 zone resets clat (usec): min=1150, max=927276, avg=43735.27, stdev=47481.22 lat (usec): min=1151, max=927278, avg=43740.69, stdev=47480.00 clat percentiles (usec): | 1.00th=[ 1352], 5.00th=[ 1582], 10.00th=[ 2311], 20.00th=[ 5473], | 30.00th=[ 11863], 40.00th=[ 23200], 50.00th=[ 33424], 60.00th=[ 45876], | 70.00th=[ 56886], 80.00th=[ 72877], 90.00th=[ 95945], 95.00th=[122160], | 99.00th=[175113], 99.50th=[223347], 99.90th=[350225], 99.95th=[926942], | 99.99th=[926942] bw ( KiB/s): min= 7, max= 110, per=24.71%, avg=45.47, stdev=18.66, samples=266 iops : min= 1, max= 27, avg=10.74, stdev= 4.72, samples=266 lat (usec) : 50=0.29%, 100=3.55%, 250=0.26%, 500=0.10%, 750=0.07% lat (usec) : 1000=0.03% lat (msec) : 2=4.30%, 4=3.78%, 10=6.38%, 20=8.24%, 50=36.91% lat (msec) : 100=29.10%, 250=6.74%, 500=0.23%, 1000=0.03% cpu : usr=0.09%, sys=5.25%, ctx=6838, majf=0, minf=20 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=176KiB/s (180kB/s), 44.2KiB/s-44.0KiB/s (45.3kB/s-46.1kB/s), io=23.4MiB (24.6MB), run=132010-136300msec WRITE: bw=184KiB/s (189kB/s), 45.9KiB/s-48.1KiB/s (47.0kB/s-49.2kB/s), io=24.6MiB (25.7MB), run=132010-136300msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144902: Thu Aug 13 11:54:30 2026 read: IOPS=5, BW=22.2KiB/s (22.7kB/s)(5992KiB/269847msec) clat (msec): min=5, max=1241, avg=36.25, stdev=47.57 lat (msec): min=5, max=1241, avg=36.25, stdev=47.57 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 36], 80.00th=[ 48], 90.00th=[ 74], 95.00th=[ 104], | 99.00th=[ 186], 99.50th=[ 207], 99.90th=[ 531], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 7, max= 87, per=28.34%, avg=24.94, stdev=16.40, samples=464 iops : min= 1, max= 21, avg= 5.59, stdev= 4.14, samples=464 write: IOPS=5, BW=23.3KiB/s (23.9kB/s)(6296KiB/269847msec); 0 zone resets clat (msec): min=32, max=758, avg=136.60, stdev=66.25 lat (msec): min=32, max=758, avg=136.60, stdev=66.25 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 61], 10.00th=[ 70], 20.00th=[ 85], | 30.00th=[ 97], 40.00th=[ 109], 50.00th=[ 122], 60.00th=[ 136], | 70.00th=[ 155], 80.00th=[ 180], 90.00th=[ 222], 95.00th=[ 268], | 99.00th=[ 359], 99.50th=[ 376], 99.90th=[ 518], 99.95th=[ 760], | 99.99th=[ 760] bw ( KiB/s): min= 7, max= 55, per=25.13%, avg=23.12, stdev=10.50, samples=524 iops : min= 1, max= 13, avg= 5.13, stdev= 2.67, samples=524 lat (msec) : 10=2.86%, 20=16.44%, 50=20.83%, 100=22.40%, 250=34.05% lat (msec) : 500=3.29%, 750=0.07%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.38%, ctx=5080, 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=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=144903: Thu Aug 13 11:54:30 2026 read: IOPS=5, BW=21.9KiB/s (22.4kB/s)(5940KiB/271549msec) clat (msec): min=5, max=970, avg=37.65, stdev=47.49 lat (msec): min=5, max=970, avg=37.66, stdev=47.49 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 29], | 70.00th=[ 35], 80.00th=[ 48], 90.00th=[ 77], 95.00th=[ 108], | 99.00th=[ 222], 99.50th=[ 305], 99.90th=[ 493], 99.95th=[ 969], | 99.99th=[ 969] bw ( KiB/s): min= 7, max= 111, per=27.89%, avg=24.54, stdev=16.53, samples=466 iops : min= 1, max= 27, avg= 5.49, stdev= 4.16, samples=466 write: IOPS=5, BW=23.4KiB/s (23.9kB/s)(6348KiB/271549msec); 0 zone resets clat (msec): min=33, max=797, avg=135.53, stdev=66.78 lat (msec): min=33, max=797, avg=135.54, stdev=66.78 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 61], 10.00th=[ 69], 20.00th=[ 84], | 30.00th=[ 96], 40.00th=[ 109], 50.00th=[ 123], 60.00th=[ 136], | 70.00th=[ 155], 80.00th=[ 180], 90.00th=[ 220], 95.00th=[ 253], | 99.00th=[ 334], 99.50th=[ 393], 99.90th=[ 760], 99.95th=[ 802], | 99.99th=[ 802] bw ( KiB/s): min= 7, max= 56, per=25.02%, avg=23.02, stdev=10.66, samples=529 iops : min= 1, max= 14, avg= 5.10, stdev= 2.71, samples=529 lat (msec) : 10=2.41%, 20=16.05%, 50=21.65%, 100=22.40%, 250=34.28% lat (msec) : 500=3.06%, 750=0.07%, 1000=0.10% cpu : usr=0.06%, sys=1.40%, ctx=5244, 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=144904: Thu Aug 13 11:54:30 2026 read: IOPS=5, BW=22.2KiB/s (22.7kB/s)(6028KiB/271871msec) clat (msec): min=5, max=330, avg=38.10, stdev=37.79 lat (msec): min=5, max=330, avg=38.10, stdev=37.79 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 30], | 70.00th=[ 39], 80.00th=[ 55], 90.00th=[ 84], 95.00th=[ 113], | 99.00th=[ 182], 99.50th=[ 247], 99.90th=[ 313], 99.95th=[ 330], | 99.99th=[ 330] bw ( KiB/s): min= 7, max= 119, per=27.20%, avg=23.94, stdev=16.41, samples=485 iops : min= 1, max= 29, avg= 5.34, stdev= 4.13, samples=485 write: IOPS=5, BW=23.0KiB/s (23.6kB/s)(6260KiB/271871msec); 0 zone resets clat (msec): min=32, max=1102, avg=136.68, stdev=69.41 lat (msec): min=32, max=1102, avg=136.69, stdev=69.41 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 60], 10.00th=[ 70], 20.00th=[ 84], | 30.00th=[ 97], 40.00th=[ 111], 50.00th=[ 125], 60.00th=[ 138], | 70.00th=[ 155], 80.00th=[ 178], 90.00th=[ 220], 95.00th=[ 262], | 99.00th=[ 347], 99.50th=[ 397], 99.90th=[ 793], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 7, max= 63, per=24.63%, avg=22.66, stdev=10.90, samples=531 iops : min= 1, max= 15, avg= 5.01, stdev= 2.77, samples=531 lat (msec) : 10=2.60%, 20=16.05%, 50=20.64%, 100=23.11%, 250=34.24% lat (msec) : 500=3.29%, 1000=0.03%, 2000=0.03% cpu : usr=0.06%, sys=1.39%, ctx=5185, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144906: Thu Aug 13 11:54:30 2026 read: IOPS=5, BW=22.4KiB/s (22.9kB/s)(6052KiB/270332msec) clat (msec): min=5, max=358, avg=36.54, stdev=38.07 lat (msec): min=5, max=358, avg=36.54, stdev=38.07 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 36], 80.00th=[ 50], 90.00th=[ 80], 95.00th=[ 108], | 99.00th=[ 194], 99.50th=[ 266], 99.90th=[ 347], 99.95th=[ 359], | 99.99th=[ 359] bw ( KiB/s): min= 7, max= 95, per=27.91%, avg=24.56, stdev=16.93, samples=475 iops : min= 1, max= 23, avg= 5.49, stdev= 4.27, samples=475 write: IOPS=5, BW=23.1KiB/s (23.6kB/s)(6236KiB/270332msec); 0 zone resets clat (msec): min=32, max=1062, avg=137.58, stdev=68.97 lat (msec): min=32, max=1062, avg=137.59, stdev=68.96 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 63], 10.00th=[ 71], 20.00th=[ 85], | 30.00th=[ 97], 40.00th=[ 110], 50.00th=[ 123], 60.00th=[ 138], | 70.00th=[ 155], 80.00th=[ 186], 90.00th=[ 224], 95.00th=[ 264], | 99.00th=[ 351], 99.50th=[ 397], 99.90th=[ 558], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 7, max= 62, per=24.69%, avg=22.72, stdev=10.73, samples=528 iops : min= 1, max= 15, avg= 5.03, stdev= 2.72, samples=528 lat (msec) : 10=3.45%, 20=15.82%, 50=21.09%, 100=22.53%, 250=33.53% lat (msec) : 500=3.45%, 750=0.10%, 2000=0.03% cpu : usr=0.05%, sys=1.43%, ctx=5243, 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=88.3KiB/s (90.4kB/s), 21.9KiB/s-22.4KiB/s (22.4kB/s-22.9kB/s), io=23.4MiB (24.6MB), run=269847-271871msec WRITE: bw=92.5KiB/s (94.7kB/s), 23.0KiB/s-23.4KiB/s (23.6kB/s-23.9kB/s), io=24.6MiB (25.7MB), run=269847-271871msec 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=144968: Thu Aug 13 11:55:16 2026 read: IOPS=10, BW=176KiB/s (180kB/s)(5920KiB/33723msec) clat (usec): min=32, max=163314, avg=43794.97, stdev=35255.22 lat (usec): min=32, max=163314, avg=43796.76, stdev=35255.26 clat percentiles (usec): | 1.00th=[ 44], 5.00th=[ 61], 10.00th=[ 70], 20.00th=[ 101], | 30.00th=[ 25822], 40.00th=[ 33817], 50.00th=[ 39584], 60.00th=[ 47449], | 70.00th=[ 57934], 80.00th=[ 71828], 90.00th=[ 88605], 95.00th=[109577], | 99.00th=[154141], 99.50th=[158335], 99.90th=[162530], 99.95th=[162530], | 99.99th=[162530] bw ( KiB/s): min= 30, max= 383, per=25.15%, avg=174.52, stdev=78.43, samples=66 iops : min= 1, max= 23, avg=10.15, stdev= 5.01, samples=66 write: IOPS=11, BW=189KiB/s (193kB/s)(6368KiB/33723msec); 0 zone resets clat (usec): min=1655, max=376928, avg=43934.99, stdev=48302.23 lat (usec): min=1658, max=376928, avg=43953.48, stdev=48306.66 clat percentiles (usec): | 1.00th=[ 1745], 5.00th=[ 2474], 10.00th=[ 3982], 20.00th=[ 7308], | 30.00th=[ 10945], 40.00th=[ 17957], 50.00th=[ 26608], 60.00th=[ 40109], | 70.00th=[ 54264], 80.00th=[ 76022], 90.00th=[105382], 95.00th=[128451], | 99.00th=[258999], 99.50th=[278922], 99.90th=[375391], 99.95th=[375391], | 99.99th=[375391] bw ( KiB/s): min= 62, max= 384, per=25.86%, avg=188.74, stdev=67.23, samples=66 iops : min= 3, max= 24, avg=11.05, stdev= 4.29, samples=66 lat (usec) : 50=1.17%, 100=8.33%, 250=0.91%, 500=0.13%, 1000=0.26% lat (msec) : 2=1.82%, 4=3.65%, 10=9.38%, 20=7.68%, 50=31.90% lat (msec) : 100=25.39%, 250=8.85%, 500=0.52% cpu : usr=0.08%, sys=4.95%, ctx=1424, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144969: Thu Aug 13 11:55:16 2026 read: IOPS=10, BW=167KiB/s (171kB/s)(5744KiB/34491msec) clat (usec): min=38, max=269422, avg=52040.62, stdev=41187.17 lat (usec): min=39, max=269424, avg=52042.71, stdev=41187.16 clat percentiles (usec): | 1.00th=[ 59], 5.00th=[ 67], 10.00th=[ 75], 20.00th=[ 17957], | 30.00th=[ 30540], 40.00th=[ 39584], 50.00th=[ 48497], 60.00th=[ 57410], | 70.00th=[ 65799], 80.00th=[ 80217], 90.00th=[107480], 95.00th=[129500], | 99.00th=[170918], 99.50th=[227541], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 31, max= 414, per=24.53%, avg=170.22, stdev=79.83, samples=65 iops : min= 1, max= 25, avg= 9.88, stdev= 5.06, samples=65 write: IOPS=11, BW=190KiB/s (194kB/s)(6544KiB/34491msec); 0 zone resets clat (usec): min=1444, max=289565, avg=38524.66, stdev=42012.32 lat (usec): min=1448, max=289568, avg=38528.73, stdev=42013.52 clat percentiles (usec): | 1.00th=[ 1778], 5.00th=[ 1991], 10.00th=[ 2737], 20.00th=[ 5538], | 30.00th=[ 8586], 40.00th=[ 14615], 50.00th=[ 21890], 60.00th=[ 36963], | 70.00th=[ 50594], 80.00th=[ 67634], 90.00th=[ 92799], 95.00th=[122160], | 99.00th=[177210], 99.50th=[212861], 99.90th=[291505], 99.95th=[291505], | 99.99th=[291505] bw ( KiB/s): min= 31, max= 447, per=25.59%, avg=186.78, stdev=87.50, samples=67 iops : min= 1, max= 27, avg=10.94, stdev= 5.55, samples=67 lat (usec) : 50=0.26%, 100=6.64%, 250=0.78%, 500=0.13%, 750=0.39% lat (msec) : 2=3.26%, 4=4.04%, 10=9.51%, 20=10.68%, 50=26.43% lat (msec) : 100=27.99%, 250=9.64%, 500=0.26% cpu : usr=0.06%, sys=5.26%, ctx=1471, 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=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=144970: Thu Aug 13 11:55:16 2026 read: IOPS=11, BW=186KiB/s (190kB/s)(6256KiB/33654msec) clat (usec): min=41, max=218432, avg=48919.37, stdev=40814.95 lat (usec): min=42, max=218434, avg=48921.26, stdev=40815.48 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 65], 10.00th=[ 72], 20.00th=[ 159], | 30.00th=[ 26870], 40.00th=[ 35390], 50.00th=[ 42730], 60.00th=[ 54789], | 70.00th=[ 66847], 80.00th=[ 77071], 90.00th=[ 98042], 95.00th=[123208], | 99.00th=[181404], 99.50th=[217056], 99.90th=[219153], 99.95th=[219153], | 99.99th=[219153] bw ( KiB/s): min= 62, max= 409, per=26.76%, avg=185.71, stdev=76.01, samples=66 iops : min= 3, max= 25, avg=10.86, stdev= 4.81, samples=66 write: IOPS=11, BW=179KiB/s (184kB/s)(6032KiB/33654msec); 0 zone resets clat (usec): min=1670, max=227450, avg=38313.75, stdev=39095.46 lat (usec): min=1673, max=227452, avg=38317.13, stdev=39094.81 clat percentiles (usec): | 1.00th=[ 1778], 5.00th=[ 2073], 10.00th=[ 2573], 20.00th=[ 6259], | 30.00th=[ 10290], 40.00th=[ 15926], 50.00th=[ 24511], 60.00th=[ 38011], | 70.00th=[ 48497], 80.00th=[ 67634], 90.00th=[ 91751], 95.00th=[116917], | 99.00th=[181404], 99.50th=[208667], 99.90th=[227541], 99.95th=[227541], | 99.99th=[227541] bw ( KiB/s): min= 62, max= 349, per=24.43%, avg=178.30, stdev=74.10, samples=66 iops : min= 3, max= 21, avg=10.38, stdev= 4.64, samples=66 lat (usec) : 50=0.78%, 100=8.85%, 250=0.65%, 500=0.13%, 750=0.13% lat (msec) : 2=1.82%, 4=6.12%, 10=7.29%, 20=8.46%, 50=29.69% lat (msec) : 100=27.73%, 250=8.33% cpu : usr=0.08%, sys=5.12%, ctx=1459, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144971: Thu Aug 13 11:55:16 2026 read: IOPS=11, BW=181KiB/s (185kB/s)(6032KiB/33308msec) clat (usec): min=33, max=324012, avg=48599.70, stdev=43525.00 lat (usec): min=34, max=324012, avg=48603.87, stdev=43522.79 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 59], 10.00th=[ 68], 20.00th=[ 93], | 30.00th=[ 24773], 40.00th=[ 36963], 50.00th=[ 46400], 60.00th=[ 52691], | 70.00th=[ 62653], 80.00th=[ 77071], 90.00th=[ 98042], 95.00th=[126354], | 99.00th=[200279], 99.50th=[265290], 99.90th=[325059], 99.95th=[325059], | 99.99th=[325059] bw ( KiB/s): min= 31, max= 407, per=25.75%, avg=178.69, stdev=74.21, samples=65 iops : min= 1, max= 25, avg=10.42, stdev= 4.69, samples=65 write: IOPS=11, BW=188KiB/s (192kB/s)(6256KiB/33308msec); 0 zone resets clat (usec): min=1708, max=321398, avg=38193.03, stdev=40747.58 lat (usec): min=1711, max=321401, avg=38195.77, stdev=40747.54 clat percentiles (usec): | 1.00th=[ 1762], 5.00th=[ 1975], 10.00th=[ 2442], 20.00th=[ 5800], | 30.00th=[ 8979], 40.00th=[ 13960], 50.00th=[ 23200], 60.00th=[ 35390], | 70.00th=[ 52167], 80.00th=[ 65799], 90.00th=[ 93848], 95.00th=[119014], | 99.00th=[164627], 99.50th=[175113], 99.90th=[320865], 99.95th=[320865], | 99.99th=[320865] bw ( KiB/s): min= 63, max= 442, per=25.58%, avg=186.71, stdev=75.91, samples=65 iops : min= 3, max= 27, avg=10.91, stdev= 4.79, samples=65 lat (usec) : 50=1.82%, 100=8.85%, 250=0.91%, 750=0.13%, 1000=0.13% lat (msec) : 2=2.86%, 4=5.08%, 10=8.59%, 20=8.72%, 50=25.26% lat (msec) : 100=28.39%, 250=8.85%, 500=0.39% cpu : usr=0.07%, sys=5.38%, ctx=1445, 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=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=694KiB/s (711kB/s), 167KiB/s-186KiB/s (171kB/s-190kB/s), io=23.4MiB (24.5MB), run=33308-34491msec WRITE: bw=731KiB/s (748kB/s), 179KiB/s-190KiB/s (184kB/s-194kB/s), io=24.6MiB (25.8MB), run=33308-34491msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144963: Thu Aug 13 11:55:50 2026 read: IOPS=5, BW=87.6KiB/s (89.7kB/s)(5920KiB/67607msec) clat (msec): min=7, max=330, avg=41.99, stdev=44.66 lat (msec): min=7, max=330, avg=41.99, stdev=44.67 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 25], 60.00th=[ 30], | 70.00th=[ 41], 80.00th=[ 62], 90.00th=[ 103], 95.00th=[ 133], | 99.00th=[ 241], 99.50th=[ 266], 99.90th=[ 330], 99.95th=[ 330], | 99.99th=[ 330] bw ( KiB/s): min= 30, max= 318, per=28.36%, avg=98.41, stdev=63.29, samples=116 iops : min= 1, max= 19, avg= 5.37, stdev= 4.04, samples=116 write: IOPS=5, BW=94.2KiB/s (96.5kB/s)(6368KiB/67607msec); 0 zone resets clat (msec): min=36, max=534, avg=130.67, stdev=71.25 lat (msec): min=36, max=534, avg=130.68, stdev=71.25 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 57], 10.00th=[ 66], 20.00th=[ 77], | 30.00th=[ 87], 40.00th=[ 100], 50.00th=[ 111], 60.00th=[ 127], | 70.00th=[ 148], 80.00th=[ 171], 90.00th=[ 228], 95.00th=[ 284], | 99.00th=[ 401], 99.50th=[ 518], 99.90th=[ 535], 99.95th=[ 535], | 99.99th=[ 535] bw ( KiB/s): min= 30, max= 223, per=26.23%, avg=95.74, stdev=48.47, samples=129 iops : min= 1, max= 13, avg= 5.19, stdev= 3.13, samples=129 lat (msec) : 10=1.82%, 20=17.58%, 50=18.75%, 100=26.30%, 250=31.90% lat (msec) : 500=3.39%, 750=0.26% cpu : usr=0.04%, sys=1.39%, ctx=1270, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144964: Thu Aug 13 11:55:50 2026 read: IOPS=5, BW=83.3KiB/s (85.2kB/s)(5744KiB/68995msec) clat (msec): min=6, max=417, avg=43.84, stdev=52.63 lat (msec): min=6, max=417, avg=43.84, stdev=52.63 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 26], 60.00th=[ 32], | 70.00th=[ 41], 80.00th=[ 58], 90.00th=[ 99], 95.00th=[ 140], | 99.00th=[ 284], 99.50th=[ 359], 99.90th=[ 418], 99.95th=[ 418], | 99.99th=[ 418] bw ( KiB/s): min= 22, max= 318, per=28.90%, avg=100.28, stdev=63.35, samples=111 iops : min= 1, max= 19, avg= 5.50, stdev= 4.02, samples=111 write: IOPS=5, BW=94.8KiB/s (97.1kB/s)(6544KiB/68995msec); 0 zone resets clat (msec): min=37, max=597, avg=129.81, stdev=79.03 lat (msec): min=37, max=597, avg=129.82, stdev=79.03 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 54], 10.00th=[ 59], 20.00th=[ 72], | 30.00th=[ 83], 40.00th=[ 93], 50.00th=[ 106], 60.00th=[ 121], | 70.00th=[ 146], 80.00th=[ 174], 90.00th=[ 228], 95.00th=[ 288], | 99.00th=[ 451], 99.50th=[ 477], 99.90th=[ 600], 99.95th=[ 600], | 99.99th=[ 600] bw ( KiB/s): min= 30, max= 224, per=26.23%, avg=95.73, stdev=52.31, samples=132 iops : min= 1, max= 14, avg= 5.20, stdev= 3.40, samples=132 lat (msec) : 10=2.21%, 20=15.89%, 50=18.88%, 100=29.43%, 250=28.65% lat (msec) : 500=4.82%, 750=0.13% cpu : usr=0.04%, sys=1.48%, ctx=1347, 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=144965: Thu Aug 13 11:55:50 2026 read: IOPS=5, BW=92.6KiB/s (94.8kB/s)(6256KiB/67556msec) clat (msec): min=5, max=420, avg=40.86, stdev=47.41 lat (msec): min=5, max=420, avg=40.86, stdev=47.41 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 13], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 26], 60.00th=[ 30], | 70.00th=[ 38], 80.00th=[ 56], 90.00th=[ 95], 95.00th=[ 124], | 99.00th=[ 230], 99.50th=[ 405], 99.90th=[ 422], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 27, max= 286, per=29.91%, avg=103.79, stdev=70.99, samples=118 iops : min= 1, max= 17, avg= 5.71, stdev= 4.53, samples=118 write: IOPS=5, BW=89.3KiB/s (91.4kB/s)(6032KiB/67556msec); 0 zone resets clat (msec): min=43, max=415, avg=136.46, stdev=72.28 lat (msec): min=43, max=416, avg=136.46, stdev=72.28 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 59], 10.00th=[ 70], 20.00th=[ 81], | 30.00th=[ 93], 40.00th=[ 102], 50.00th=[ 114], 60.00th=[ 132], | 70.00th=[ 153], 80.00th=[ 186], 90.00th=[ 243], 95.00th=[ 284], | 99.00th=[ 401], 99.50th=[ 414], 99.90th=[ 418], 99.95th=[ 418], | 99.99th=[ 418] bw ( KiB/s): min= 30, max= 223, per=25.30%, avg=92.33, stdev=42.85, samples=126 iops : min= 1, max= 13, avg= 4.97, stdev= 2.77, samples=126 lat (msec) : 10=3.26%, 20=16.41%, 50=20.96%, 100=25.13%, 250=29.43% lat (msec) : 500=4.82% cpu : usr=0.04%, sys=1.39%, ctx=1217, 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=144966: Thu Aug 13 11:55:50 2026 read: IOPS=5, BW=88.6KiB/s (90.8kB/s)(6032KiB/68045msec) clat (msec): min=6, max=429, avg=42.30, stdev=52.98 lat (msec): min=6, max=429, avg=42.31, stdev=52.98 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 26], 60.00th=[ 30], | 70.00th=[ 37], 80.00th=[ 53], 90.00th=[ 102], 95.00th=[ 127], | 99.00th=[ 347], 99.50th=[ 418], 99.90th=[ 430], 99.95th=[ 430], | 99.99th=[ 430] bw ( KiB/s): min= 30, max= 350, per=29.90%, avg=103.77, stdev=69.65, samples=112 iops : min= 1, max= 21, avg= 5.71, stdev= 4.45, samples=112 write: IOPS=5, BW=91.9KiB/s (94.1kB/s)(6256KiB/68045msec); 0 zone resets clat (msec): min=43, max=445, avg=132.82, stdev=73.13 lat (msec): min=43, max=445, avg=132.83, stdev=73.13 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 59], 10.00th=[ 70], 20.00th=[ 78], | 30.00th=[ 87], 40.00th=[ 99], 50.00th=[ 109], 60.00th=[ 126], | 70.00th=[ 146], 80.00th=[ 184], 90.00th=[ 234], 95.00th=[ 284], | 99.00th=[ 380], 99.50th=[ 422], 99.90th=[ 447], 99.95th=[ 447], | 99.99th=[ 447] bw ( KiB/s): min= 27, max= 224, per=26.20%, avg=95.62, stdev=48.02, samples=127 iops : min= 1, max= 14, avg= 5.19, stdev= 3.13, samples=127 lat (msec) : 10=1.69%, 20=16.80%, 50=21.22%, 100=25.26%, 250=30.34% lat (msec) : 500=4.69% cpu : usr=0.03%, sys=1.41%, ctx=1304, 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=347KiB/s (355kB/s), 83.3KiB/s-92.6KiB/s (85.2kB/s-94.8kB/s), io=23.4MiB (24.5MB), run=67556-68995msec WRITE: bw=365KiB/s (374kB/s), 89.3KiB/s-94.8KiB/s (91.4kB/s-97.1kB/s), io=24.6MiB (25.8MB), run=67556-68995msec 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=144990: Thu Aug 13 11:56:06 2026 read: IOPS=0, BW=958KiB/s (981kB/s)(7168KiB/7481msec) clat (usec): min=652, max=2890.9k, avg=764332.27, stdev=1088169.10 lat (usec): min=654, max=2890.9k, avg=764333.93, stdev=1088169.71 clat percentiles (usec): | 1.00th=[ 652], 5.00th=[ 652], 10.00th=[ 652], | 20.00th=[ 139461], 30.00th=[ 164627], 40.00th=[ 164627], | 50.00th=[ 223347], 60.00th=[ 304088], 70.00th=[ 304088], | 80.00th=[1619002], 90.00th=[2902459], 95.00th=[2902459], | 99.00th=[2902459], 99.50th=[2902459], 99.90th=[2902459], | 99.95th=[2902459], 99.99th=[2902459] bw ( KiB/s): min= 1965, max= 4071, per=96.49%, avg=2421.00, stdev=922.83, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 write: IOPS=0, BW=684KiB/s (701kB/s)(5120KiB/7481msec); 0 zone resets clat (msec): min=87, max=532, avg=389.69, stdev=182.25 lat (msec): min=87, max=532, avg=389.80, stdev=182.26 clat percentiles (msec): | 1.00th=[ 88], 5.00th=[ 88], 10.00th=[ 88], 20.00th=[ 88], | 30.00th=[ 359], 40.00th=[ 359], 50.00th=[ 460], 60.00th=[ 460], | 70.00th=[ 514], 80.00th=[ 514], 90.00th=[ 531], 95.00th=[ 531], | 99.00th=[ 531], 99.50th=[ 531], 99.90th=[ 531], 99.95th=[ 531], | 99.99th=[ 531] bw ( KiB/s): min= 1917, max= 2043, per=56.78%, avg=1994.75, stdev=58.05, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (usec) : 750=8.33% lat (msec) : 100=8.33%, 250=25.00%, 500=25.00%, 750=16.67%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=9.18%, ctx=895, 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=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=144991: Thu Aug 13 11:56:06 2026 read: IOPS=0, BW=251KiB/s (257kB/s)(2048KiB/8161msec) clat (msec): min=205, max=315, avg=260.47, stdev=78.23 lat (msec): min=205, max=315, avg=260.47, stdev=78.23 clat percentiles (msec): | 1.00th=[ 205], 5.00th=[ 205], 10.00th=[ 205], 20.00th=[ 205], | 30.00th=[ 205], 40.00th=[ 205], 50.00th=[ 205], 60.00th=[ 317], | 70.00th=[ 317], 80.00th=[ 317], 90.00th=[ 317], 95.00th=[ 317], | 99.00th=[ 317], 99.50th=[ 317], 99.90th=[ 317], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 1396, max= 1984, per=67.36%, avg=1690.00, stdev=415.78, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1255KiB/s (1285kB/s)(10.0MiB/8161msec); 0 zone resets clat (msec): min=90, max=4639, avg=754.72, stdev=1373.98 lat (msec): min=94, max=4639, avg=755.51, stdev=1373.69 clat percentiles (msec): | 1.00th=[ 91], 5.00th=[ 91], 10.00th=[ 91], 20.00th=[ 140], | 30.00th=[ 205], 40.00th=[ 284], 50.00th=[ 305], 60.00th=[ 401], | 70.00th=[ 405], 80.00th=[ 456], 90.00th=[ 625], 95.00th=[ 4665], | 99.00th=[ 4665], 99.50th=[ 4665], 99.90th=[ 4665], 99.95th=[ 4665], | 99.99th=[ 4665] bw ( KiB/s): min= 1917, max= 5896, per=85.12%, avg=2990.33, stdev=1648.83, samples=6 iops : min= 1, max= 5, avg= 2.00, stdev= 1.67, samples=6 lat (msec) : 100=8.33%, 250=25.00%, 500=50.00%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=6.67%, ctx=116, 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=144992: Thu Aug 13 11:56:06 2026 read: IOPS=0, BW=795KiB/s (814kB/s)(6144KiB/7728msec) clat (usec): min=559, max=263856, avg=93621.81, stdev=119550.57 lat (usec): min=560, max=263856, avg=93623.21, stdev=119550.15 clat percentiles (usec): | 1.00th=[ 562], 5.00th=[ 562], 10.00th=[ 562], 20.00th=[ 586], | 30.00th=[ 586], 40.00th=[ 701], 50.00th=[ 701], 60.00th=[ 74974], | 70.00th=[221250], 80.00th=[221250], 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= 1917, max= 3930, per=100.00%, avg=2630.00, stdev=1127.59, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=0, BW=795KiB/s (814kB/s)(6144KiB/7728msec); 0 zone resets clat (msec): min=177, max=5004, avg=1136.03, stdev=1906.21 lat (msec): min=177, max=5004, avg=1136.50, stdev=1906.01 clat percentiles (msec): | 1.00th=[ 178], 5.00th=[ 178], 10.00th=[ 178], 20.00th=[ 194], | 30.00th=[ 194], 40.00th=[ 224], 50.00th=[ 224], 60.00th=[ 542], | 70.00th=[ 676], 80.00th=[ 676], 90.00th=[ 5000], 95.00th=[ 5000], | 99.00th=[ 5000], 99.50th=[ 5000], 99.90th=[ 5000], 99.95th=[ 5000], | 99.99th=[ 5000] bw ( KiB/s): min= 1481, max= 2043, per=53.71%, avg=1886.75, stdev=271.84, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (usec) : 750=25.00% lat (msec) : 100=8.33%, 250=33.33%, 500=8.33%, 750=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=6.07%, ctx=146, 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=144993: Thu Aug 13 11:56:06 2026 read: IOPS=0, BW=657KiB/s (673kB/s)(5120KiB/7794msec) clat (usec): min=576, max=279911, avg=84400.48, stdev=124868.66 lat (usec): min=587, max=279912, avg=84403.74, stdev=124867.11 clat percentiles (usec): | 1.00th=[ 578], 5.00th=[ 578], 10.00th=[ 578], 20.00th=[ 578], | 30.00th=[ 693], 40.00th=[ 693], 50.00th=[ 701], 60.00th=[ 701], | 70.00th=[139461], 80.00th=[139461], 90.00th=[278922], 95.00th=[278922], | 99.00th=[278922], 99.50th=[278922], 99.90th=[278922], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 1984, max= 5896, per=100.00%, avg=3940.00, stdev=2766.20, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=0, BW=920KiB/s (942kB/s)(7168KiB/7794msec); 0 zone resets clat (msec): min=240, max=4728, avg=1005.59, stdev=1650.40 lat (msec): min=240, max=4729, avg=1005.67, stdev=1650.40 clat percentiles (msec): | 1.00th=[ 241], 5.00th=[ 241], 10.00th=[ 241], 20.00th=[ 292], | 30.00th=[ 296], 40.00th=[ 296], 50.00th=[ 313], 60.00th=[ 430], | 70.00th=[ 430], 80.00th=[ 735], 90.00th=[ 4732], 95.00th=[ 4732], | 99.00th=[ 4732], 99.50th=[ 4732], 99.90th=[ 4732], 99.95th=[ 4732], | 99.99th=[ 4732] bw ( KiB/s): min= 1460, max= 2043, per=53.34%, avg=1873.80, stdev=235.68, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (usec) : 750=25.00% lat (msec) : 250=16.67%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.03%, sys=6.70%, ctx=140, 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=2509KiB/s (2570kB/s), 251KiB/s-958KiB/s (257kB/s-981kB/s), io=20.0MiB (20.0MB), run=7481-8161msec WRITE: bw=3513KiB/s (3598kB/s), 684KiB/s-1255KiB/s (701kB/s-1285kB/s), io=28.0MiB (29.4MB), run=7481-8161msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144986: Thu Aug 13 11:56:07 2026 read: IOPS=0, BW=769KiB/s (787kB/s)(7168KiB/9323msec) clat (msec): min=66, max=2939, avg=1024.32, stdev=1319.93 lat (msec): min=66, max=2939, avg=1024.32, stdev=1319.93 clat percentiles (msec): | 1.00th=[ 67], 5.00th=[ 67], 10.00th=[ 67], 20.00th=[ 116], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 305], 60.00th=[ 684], | 70.00th=[ 684], 80.00th=[ 2937], 90.00th=[ 2937], 95.00th=[ 2937], | 99.00th=[ 2937], 99.50th=[ 2937], 99.90th=[ 2937], 99.95th=[ 2937], | 99.99th=[ 2937] bw ( KiB/s): min= 1980, max= 3961, per=100.00%, avg=2411.00, stdev=866.87, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 write: IOPS=0, BW=549KiB/s (562kB/s)(5120KiB/9323msec); 0 zone resets clat (msec): min=157, max=521, avg=371.74, stdev=146.92 lat (msec): min=158, max=521, avg=371.83, stdev=146.94 clat percentiles (msec): | 1.00th=[ 159], 5.00th=[ 159], 10.00th=[ 159], 20.00th=[ 159], | 30.00th=[ 288], 40.00th=[ 288], 50.00th=[ 430], 60.00th=[ 430], | 70.00th=[ 460], 80.00th=[ 460], 90.00th=[ 523], 95.00th=[ 523], | 99.00th=[ 523], 99.50th=[ 523], 99.90th=[ 523], 99.95th=[ 523], | 99.99th=[ 523] bw ( KiB/s): min= 1903, max= 4096, per=81.80%, avg=2515.25, stdev=1055.60, samples=4 iops : min= 1, max= 4, avg= 1.75, stdev= 1.50, samples=4 lat (msec) : 100=8.33%, 250=25.00%, 500=33.33%, 750=16.67%, >=2000=16.67% cpu : usr=0.00%, sys=2.39%, ctx=83, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=144987: Thu Aug 13 11:56:07 2026 read: IOPS=0, BW=222KiB/s (228kB/s)(2048KiB/9212msec) clat (msec): min=120, max=181, avg=151.43, stdev=43.12 lat (msec): min=120, max=181, avg=151.44, stdev=43.12 clat percentiles (msec): | 1.00th=[ 122], 5.00th=[ 122], 10.00th=[ 122], 20.00th=[ 122], | 30.00th=[ 122], 40.00th=[ 122], 50.00th=[ 122], 60.00th=[ 182], | 70.00th=[ 182], 80.00th=[ 182], 90.00th=[ 182], 95.00th=[ 182], | 99.00th=[ 182], 99.50th=[ 182], 99.90th=[ 182], 99.95th=[ 182], | 99.99th=[ 182] bw ( KiB/s): min= 1706, max= 1980, per=83.93%, avg=1843.00, stdev=193.75, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1112KiB/s (1138kB/s)(10.0MiB/9212msec); 0 zone resets clat (msec): min=202, max=5369, avg=873.88, stdev=1594.69 lat (msec): min=202, max=5369, avg=874.00, stdev=1594.69 clat percentiles (msec): | 1.00th=[ 203], 5.00th=[ 203], 10.00th=[ 203], 20.00th=[ 230], | 30.00th=[ 234], 40.00th=[ 309], 50.00th=[ 321], 60.00th=[ 321], | 70.00th=[ 326], 80.00th=[ 477], 90.00th=[ 953], 95.00th=[ 5403], | 99.00th=[ 5403], 99.50th=[ 5403], 99.90th=[ 5403], 99.95th=[ 5403], | 99.99th=[ 5403] bw ( KiB/s): min= 2039, max= 4039, per=100.00%, avg=3208.60, stdev=1066.34, samples=5 iops : min= 1, max= 3, avg= 2.20, stdev= 1.10, samples=5 lat (msec) : 250=41.67%, 500=41.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.02%, sys=2.52%, ctx=117, 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=144988: Thu Aug 13 11:56:07 2026 read: IOPS=0, BW=686KiB/s (702kB/s)(6144KiB/8956msec) clat (msec): min=101, max=1135, avg=441.63, stdev=363.25 lat (msec): min=101, max=1135, avg=441.63, stdev=363.25 clat percentiles (msec): | 1.00th=[ 102], 5.00th=[ 102], 10.00th=[ 102], 20.00th=[ 213], | 30.00th=[ 213], 40.00th=[ 347], 50.00th=[ 347], 60.00th=[ 401], | 70.00th=[ 456], 80.00th=[ 456], 90.00th=[ 1133], 95.00th=[ 1133], | 99.00th=[ 1133], 99.50th=[ 1133], 99.90th=[ 1133], 99.95th=[ 1133], | 99.99th=[ 1133] bw ( KiB/s): min= 1980, max= 2043, per=91.28%, avg=2004.40, stdev=26.99, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 write: IOPS=0, BW=686KiB/s (702kB/s)(6144KiB/8956msec); 0 zone resets clat (msec): min=182, max=4596, avg=1039.20, stdev=1746.49 lat (msec): min=183, max=4597, avg=1039.69, stdev=1746.86 clat percentiles (msec): | 1.00th=[ 184], 5.00th=[ 184], 10.00th=[ 184], 20.00th=[ 228], | 30.00th=[ 228], 40.00th=[ 313], 50.00th=[ 313], 60.00th=[ 422], | 70.00th=[ 493], 80.00th=[ 493], 90.00th=[ 4597], 95.00th=[ 4597], | 99.00th=[ 4597], 99.50th=[ 4597], 99.90th=[ 4597], 99.95th=[ 4597], | 99.99th=[ 4597] bw ( KiB/s): min= 2019, max= 3043, per=74.31%, avg=2285.00, stdev=505.42, samples=4 iops : min= 1, max= 2, avg= 1.25, stdev= 0.50, samples=4 lat (msec) : 250=33.33%, 500=50.00%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=1.44%, ctx=74, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144989: Thu Aug 13 11:56:07 2026 read: IOPS=0, BW=569KiB/s (583kB/s)(5120KiB/8996msec) clat (msec): min=112, max=663, avg=361.77, stdev=205.45 lat (msec): min=112, max=663, avg=361.77, stdev=205.45 clat percentiles (msec): | 1.00th=[ 113], 5.00th=[ 113], 10.00th=[ 113], 20.00th=[ 113], | 30.00th=[ 255], 40.00th=[ 255], 50.00th=[ 351], 60.00th=[ 351], | 70.00th=[ 430], 80.00th=[ 430], 90.00th=[ 667], 95.00th=[ 667], | 99.00th=[ 667], 99.50th=[ 667], 99.90th=[ 667], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 1903, max= 2043, per=90.68%, avg=1991.25, stdev=65.51, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 write: IOPS=0, BW=797KiB/s (816kB/s)(7168KiB/8996msec); 0 zone resets clat (msec): min=237, max=4478, avg=982.82, stdev=1550.25 lat (msec): min=237, max=4478, avg=982.91, stdev=1550.23 clat percentiles (msec): | 1.00th=[ 239], 5.00th=[ 239], 10.00th=[ 239], 20.00th=[ 241], | 30.00th=[ 296], 40.00th=[ 296], 50.00th=[ 393], 60.00th=[ 600], | 70.00th=[ 600], 80.00th=[ 634], 90.00th=[ 4463], 95.00th=[ 4463], | 99.00th=[ 4463], 99.50th=[ 4463], 99.90th=[ 4463], 99.95th=[ 4463], | 99.99th=[ 4463] bw ( KiB/s): min= 1514, max= 2043, per=62.85%, avg=1932.50, stdev=206.39, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (msec) : 250=25.00%, 500=41.67%, 750=25.00%, >=2000=8.33% cpu : usr=0.00%, sys=2.76%, ctx=105, 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=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=2197KiB/s (2249kB/s), 222KiB/s-769KiB/s (228kB/s-787kB/s), io=20.0MiB (20.0MB), run=8956-9323msec WRITE: bw=3075KiB/s (3149kB/s), 549KiB/s-1112KiB/s (562kB/s-1138kB/s), io=28.0MiB (29.4MB), run=8956-9323msec 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=145002: Thu Aug 13 11:56:20 2026 read: IOPS=1, BW=5032KiB/s (5153kB/s)(12.0MiB/2442msec) clat (msec): min=592, max=922, avg=754.66, stdev=164.94 lat (msec): min=592, max=922, avg=754.66, stdev=164.94 clat percentiles (msec): | 1.00th=[ 592], 5.00th=[ 592], 10.00th=[ 592], 20.00th=[ 592], | 30.00th=[ 592], 40.00th=[ 751], 50.00th=[ 751], 60.00th=[ 751], | 70.00th=[ 919], 80.00th=[ 919], 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= 7922, max= 8159, per=100.00%, avg=8040.50, stdev=167.58, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=13.31%, ctx=398, 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=145003: Thu Aug 13 11:56:20 2026 read: IOPS=0, BW=1623KiB/s (1662kB/s)(4096KiB/2524msec) clat (nsec): min=884201k, max=884201k, avg=884201406.00, stdev= 0.00 lat (nsec): min=884204k, max=884204k, avg=884204221.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 885], 5.00th=[ 885], 10.00th=[ 885], 20.00th=[ 885], | 30.00th=[ 885], 40.00th=[ 885], 50.00th=[ 885], 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= 7922, max= 7922, per=100.00%, avg=7922.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3246KiB/s (3324kB/s)(8192KiB/2524msec); 0 zone resets clat (msec): min=455, max=1097, avg=776.24, stdev=453.73 lat (msec): min=455, max=1097, avg=776.81, stdev=453.82 clat percentiles (msec): | 1.00th=[ 456], 5.00th=[ 456], 10.00th=[ 456], 20.00th=[ 456], | 30.00th=[ 456], 40.00th=[ 456], 50.00th=[ 456], 60.00th=[ 1099], | 70.00th=[ 1099], 80.00th=[ 1099], 90.00th=[ 1099], 95.00th=[ 1099], | 99.00th=[ 1099], 99.50th=[ 1099], 99.90th=[ 1099], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 8175, max= 8175, per=62.97%, 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=6.38%, ctx=97, 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=145004: Thu Aug 13 11:56:20 2026 write: IOPS=2, BW=9366KiB/s (9591kB/s)(12.0MiB/1312msec); 0 zone resets clat (msec): min=326, max=481, avg=414.92, stdev=79.61 lat (msec): min=327, max=482, avg=415.33, stdev=79.53 clat percentiles (msec): | 1.00th=[ 326], 5.00th=[ 326], 10.00th=[ 326], 20.00th=[ 326], | 30.00th=[ 326], 40.00th=[ 435], 50.00th=[ 435], 60.00th=[ 435], | 70.00th=[ 481], 80.00th=[ 481], 90.00th=[ 481], 95.00th=[ 481], | 99.00th=[ 481], 99.50th=[ 481], 99.90th=[ 481], 99.95th=[ 481], | 99.99th=[ 481] bw ( KiB/s): min= 6977, max= 7937, per=57.44%, avg=7457.00, stdev=678.82, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=100.00% cpu : usr=0.08%, sys=8.62%, ctx=37, 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=145006: Thu Aug 13 11:56:20 2026 write: IOPS=1, BW=6138KiB/s (6285kB/s)(12.0MiB/2002msec); 0 zone resets clat (msec): min=340, max=1012, avg=640.75, stdev=341.42 lat (msec): min=341, max=1012, avg=641.12, stdev=341.46 clat percentiles (msec): | 1.00th=[ 342], 5.00th=[ 342], 10.00th=[ 342], 20.00th=[ 342], | 30.00th=[ 342], 40.00th=[ 567], 50.00th=[ 567], 60.00th=[ 567], | 70.00th=[ 1011], 80.00th=[ 1011], 90.00th=[ 1011], 95.00th=[ 1011], | 99.00th=[ 1011], 99.50th=[ 1011], 99.90th=[ 1011], 99.95th=[ 1011], | 99.99th=[ 1011] bw ( KiB/s): min= 7557, max= 7922, per=59.62%, avg=7739.50, stdev=258.09, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=5.30%, ctx=71, 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=6491KiB/s (6647kB/s), 1623KiB/s-5032KiB/s (1662kB/s-5153kB/s), io=16.0MiB (16.8MB), run=2442-2524msec WRITE: bw=12.7MiB/s (13.3MB/s), 3246KiB/s-9366KiB/s (3324kB/s-9591kB/s), io=32.0MiB (33.6MB), run=1312-2524msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145005: Thu Aug 13 11:56:21 2026 read: IOPS=0, BW=4041KiB/s (4138kB/s)(12.0MiB/3041msec) clat (msec): min=257, max=1271, avg=856.96, stdev=532.11 lat (msec): min=257, max=1271, avg=856.96, stdev=532.11 clat percentiles (msec): | 1.00th=[ 257], 5.00th=[ 257], 10.00th=[ 257], 20.00th=[ 257], | 30.00th=[ 257], 40.00th=[ 1045], 50.00th=[ 1045], 60.00th=[ 1045], | 70.00th=[ 1267], 80.00th=[ 1267], 90.00th=[ 1267], 95.00th=[ 1267], | 99.00th=[ 1267], 99.50th=[ 1267], 99.90th=[ 1267], 99.95th=[ 1267], | 99.99th=[ 1267] bw ( KiB/s): min= 8015, max= 8015, per=100.00%, avg=8015.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.39%, ctx=50, 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=145007: Thu Aug 13 11:56:21 2026 read: IOPS=0, BW=1500KiB/s (1536kB/s)(4096KiB/2730msec) clat (nsec): min=1045.9M, max=1045.9M, avg=1045852821.00, stdev= 0.00 lat (nsec): min=1045.9M, max=1045.9M, avg=1045855354.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1045], 5.00th=[ 1045], 10.00th=[ 1045], 20.00th=[ 1045], | 30.00th=[ 1045], 40.00th=[ 1045], 50.00th=[ 1045], 60.00th=[ 1045], | 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= 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=3001KiB/s (3073kB/s)(8192KiB/2730msec); 0 zone resets clat (msec): min=669, max=920, avg=794.99, stdev=177.85 lat (msec): min=669, max=921, avg=795.42, stdev=177.60 clat percentiles (msec): | 1.00th=[ 667], 5.00th=[ 667], 10.00th=[ 667], 20.00th=[ 667], | 30.00th=[ 667], 40.00th=[ 667], 50.00th=[ 667], 60.00th=[ 919], | 70.00th=[ 919], 80.00th=[ 919], 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= 8015, max= 8015, per=81.58%, avg=8015.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.08%, ctx=37, 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=145008: Thu Aug 13 11:56:21 2026 write: IOPS=0, BW=3685KiB/s (3773kB/s)(12.0MiB/3335msec); 0 zone resets clat (msec): min=254, max=2038, avg=1093.79, stdev=896.65 lat (msec): min=254, max=2038, avg=1094.19, stdev=896.64 clat percentiles (msec): | 1.00th=[ 255], 5.00th=[ 255], 10.00th=[ 255], 20.00th=[ 255], | 30.00th=[ 255], 40.00th=[ 986], 50.00th=[ 986], 60.00th=[ 986], | 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= 7613, max= 7613, per=77.49%, avg=7613.00, 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=3.99%, ctx=61, 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=145009: Thu Aug 13 11:56:21 2026 write: IOPS=1, BW=5057KiB/s (5178kB/s)(12.0MiB/2430msec); 0 zone resets clat (msec): min=375, max=1366, avg=746.83, stdev=540.23 lat (msec): min=375, max=1367, avg=747.25, stdev=540.27 clat percentiles (msec): | 1.00th=[ 376], 5.00th=[ 376], 10.00th=[ 376], 20.00th=[ 376], | 30.00th=[ 376], 40.00th=[ 498], 50.00th=[ 498], 60.00th=[ 498], | 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= 8015, max= 8192, per=82.48%, avg=8103.50, stdev=125.16, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=66.67%, 2000=33.33% cpu : usr=0.00%, sys=6.22%, ctx=52, 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=5388KiB/s (5517kB/s), 1500KiB/s-4041KiB/s (1536kB/s-4138kB/s), io=16.0MiB (16.8MB), run=2730-3041msec WRITE: bw=9825KiB/s (10.1MB/s), 3001KiB/s-5057KiB/s (3073kB/s-5178kB/s), io=32.0MiB (33.6MB), run=2430-3335msec