== sanity test 398b: DIO and buffer IO race ============== 12:30:08 (1788798608) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.97345 s, 8.4 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=178690: Mon Sep 7 12:32:17 2026 read: IOPS=13, BW=55.2KiB/s (56.5kB/s)(5992KiB/108533msec) clat (usec): min=40, max=634393, avg=39981.40, stdev=31344.32 lat (usec): min=41, max=634394, avg=39983.94, stdev=31344.30 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 6849], 10.00th=[ 14615], 20.00th=[ 20317], | 30.00th=[ 23987], 40.00th=[ 28443], 50.00th=[ 33162], 60.00th=[ 39584], | 70.00th=[ 46400], 80.00th=[ 55837], 90.00th=[ 73925], 95.00th=[ 88605], | 99.00th=[135267], 99.50th=[164627], 99.90th=[333448], 99.95th=[633340], | 99.99th=[633340] bw ( KiB/s): min= 7, max= 110, per=25.56%, avg=54.95, stdev=20.07, samples=213 iops : min= 1, max= 27, avg=13.07, stdev= 5.04, samples=213 write: IOPS=14, BW=58.0KiB/s (59.4kB/s)(6296KiB/108533msec); 0 zone resets clat (usec): min=882, max=256563, avg=30547.11, stdev=32366.25 lat (usec): min=884, max=256564, avg=30552.00, stdev=32366.97 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1221], 10.00th=[ 1450], 20.00th=[ 2900], | 30.00th=[ 5866], 40.00th=[ 13698], 50.00th=[ 22414], 60.00th=[ 29492], | 70.00th=[ 39060], 80.00th=[ 51119], 90.00th=[ 73925], 95.00th=[ 93848], | 99.00th=[141558], 99.50th=[158335], 99.90th=[187696], 99.95th=[256902], | 99.99th=[256902] bw ( KiB/s): min= 7, max= 134, per=25.66%, avg=57.73, stdev=24.47, samples=213 iops : min= 1, max= 33, avg=13.77, stdev= 6.17, samples=213 lat (usec) : 50=0.23%, 100=1.92%, 250=0.10%, 500=0.03%, 750=0.03% lat (usec) : 1000=0.13% lat (msec) : 2=7.62%, 4=4.92%, 10=6.28%, 20=12.73%, 50=43.00% lat (msec) : 100=19.27%, 250=3.65%, 500=0.07%, 750=0.03% cpu : usr=0.08%, sys=5.14%, ctx=6317, 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=178691: Mon Sep 7 12:32:17 2026 read: IOPS=13, BW=54.1KiB/s (55.4kB/s)(5940KiB/109856msec) clat (usec): min=28, max=730051, avg=40711.88, stdev=32240.59 lat (usec): min=29, max=730052, avg=40714.78, stdev=32238.63 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 10159], 10.00th=[ 15270], 20.00th=[ 20055], | 30.00th=[ 23987], 40.00th=[ 28967], 50.00th=[ 34341], 60.00th=[ 40633], | 70.00th=[ 47973], 80.00th=[ 56886], 90.00th=[ 73925], 95.00th=[ 87557], | 99.00th=[133694], 99.50th=[160433], 99.90th=[227541], 99.95th=[734004], | 99.99th=[734004] bw ( KiB/s): min= 7, max= 110, per=25.19%, avg=54.16, stdev=19.31, samples=215 iops : min= 1, max= 27, avg=12.87, stdev= 4.87, samples=215 write: IOPS=14, BW=57.8KiB/s (59.2kB/s)(6348KiB/109856msec); 0 zone resets clat (usec): min=677, max=299240, avg=30773.48, stdev=32382.17 lat (usec): min=678, max=299241, avg=30776.63, stdev=32380.77 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1221], 10.00th=[ 1401], 20.00th=[ 3195], | 30.00th=[ 6652], 40.00th=[ 15139], 50.00th=[ 22938], 60.00th=[ 30278], | 70.00th=[ 39584], 80.00th=[ 53216], 90.00th=[ 71828], 95.00th=[ 93848], | 99.00th=[137364], 99.50th=[170918], 99.90th=[242222], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 15, max= 151, per=25.72%, avg=57.88, stdev=26.19, samples=215 iops : min= 3, max= 37, avg=13.80, stdev= 6.58, samples=215 lat (usec) : 50=0.26%, 100=1.56%, 250=0.13%, 750=0.07%, 1000=0.20% lat (msec) : 2=7.49%, 4=4.17%, 10=6.67%, 20=12.92%, 50=42.15% lat (msec) : 100=20.74%, 250=3.58%, 500=0.03%, 750=0.03% cpu : usr=0.08%, sys=5.14%, ctx=6436, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178693: Mon Sep 7 12:32:17 2026 read: IOPS=13, BW=55.6KiB/s (56.9kB/s)(6028KiB/108484msec) clat (usec): min=36, max=260568, avg=39286.87, stdev=26964.30 lat (usec): min=37, max=260569, avg=39291.28, stdev=26962.04 clat percentiles (usec): | 1.00th=[ 54], 5.00th=[ 8586], 10.00th=[ 14877], 20.00th=[ 20317], | 30.00th=[ 24249], 40.00th=[ 28705], 50.00th=[ 33817], 60.00th=[ 39584], | 70.00th=[ 46924], 80.00th=[ 54789], 90.00th=[ 68682], 95.00th=[ 85459], | 99.00th=[133694], 99.50th=[149947], 99.90th=[258999], 99.95th=[261096], | 99.99th=[261096] bw ( KiB/s): min= 7, max= 103, per=25.86%, avg=55.59, stdev=20.13, samples=212 iops : min= 1, max= 25, avg=13.23, stdev= 5.07, samples=212 write: IOPS=14, BW=57.7KiB/s (59.1kB/s)(6260KiB/108484msec); 0 zone resets clat (usec): min=803, max=731834, avg=31143.97, stdev=38057.82 lat (usec): min=804, max=731836, avg=31146.17, stdev=38057.90 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1237], 10.00th=[ 1467], 20.00th=[ 3163], | 30.00th=[ 6128], 40.00th=[ 13829], 50.00th=[ 21890], 60.00th=[ 28443], | 70.00th=[ 38536], 80.00th=[ 52167], 90.00th=[ 72877], 95.00th=[ 98042], | 99.00th=[156238], 99.50th=[175113], 99.90th=[295699], 99.95th=[734004], | 99.99th=[734004] bw ( KiB/s): min= 7, max= 144, per=25.55%, avg=57.49, stdev=24.95, samples=213 iops : min= 1, max= 36, avg=13.71, stdev= 6.30, samples=213 lat (usec) : 50=0.23%, 100=1.73%, 250=0.16%, 750=0.03%, 1000=0.16% lat (msec) : 2=6.77%, 4=4.85%, 10=7.32%, 20=12.37%, 50=43.07% lat (msec) : 100=19.37%, 250=3.81%, 500=0.10%, 750=0.03% cpu : usr=0.07%, sys=5.18%, ctx=6381, 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=178694: Mon Sep 7 12:32:17 2026 read: IOPS=13, BW=54.4KiB/s (55.7kB/s)(6052KiB/111243msec) clat (usec): min=40, max=229963, avg=39508.10, stdev=26454.75 lat (usec): min=41, max=229963, avg=39514.58, stdev=26457.45 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 10290], 10.00th=[ 15008], 20.00th=[ 19530], | 30.00th=[ 23725], 40.00th=[ 28705], 50.00th=[ 34341], 60.00th=[ 40109], | 70.00th=[ 47449], 80.00th=[ 56886], 90.00th=[ 70779], 95.00th=[ 85459], | 99.00th=[133694], 99.50th=[160433], 99.90th=[219153], 99.95th=[229639], | 99.99th=[229639] bw ( KiB/s): min= 7, max= 119, per=25.21%, avg=54.20, stdev=20.95, samples=218 iops : min= 1, max= 29, avg=12.88, stdev= 5.27, samples=218 write: IOPS=14, BW=56.1KiB/s (57.4kB/s)(6236KiB/111243msec); 0 zone resets clat (usec): min=913, max=683670, avg=32676.68, stdev=37298.43 lat (usec): min=914, max=683672, avg=32680.09, stdev=37297.30 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1221], 10.00th=[ 1385], 20.00th=[ 3228], | 30.00th=[ 7046], 40.00th=[ 15533], 50.00th=[ 23200], 60.00th=[ 30278], | 70.00th=[ 41157], 80.00th=[ 55313], 90.00th=[ 77071], 95.00th=[100140], | 99.00th=[143655], 99.50th=[166724], 99.90th=[238027], 99.95th=[683672], | 99.99th=[683672] bw ( KiB/s): min= 7, max= 127, per=24.77%, avg=55.74, stdev=22.58, samples=218 iops : min= 1, max= 31, avg=13.27, stdev= 5.66, samples=218 lat (usec) : 50=0.10%, 100=1.43%, 250=0.20%, 750=0.03%, 1000=0.10% lat (msec) : 2=7.23%, 4=4.13%, 10=6.22%, 20=13.93%, 50=41.93% lat (msec) : 100=20.90%, 250=3.78%, 750=0.03% cpu : usr=0.09%, sys=5.20%, ctx=6595, 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=216KiB/s (221kB/s), 54.1KiB/s-55.6KiB/s (55.4kB/s-56.9kB/s), io=23.4MiB (24.6MB), run=108484-111243msec WRITE: bw=226KiB/s (231kB/s), 56.1KiB/s-58.0KiB/s (57.4kB/s-59.4kB/s), io=24.6MiB (25.7MB), run=108484-111243msec rand-rw: (groupid=0, jobs=1): err= 0: pid=178689: Mon Sep 7 12:32:54 2026 read: IOPS=10, BW=40.5KiB/s (41.4kB/s)(5992KiB/148090msec) clat (msec): min=4, max=678, avg=39.38, stdev=38.18 lat (msec): min=4, max=678, avg=39.38, stdev=38.18 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 44], 80.00th=[ 59], 90.00th=[ 87], 95.00th=[ 110], | 99.00th=[ 163], 99.50th=[ 197], 99.90th=[ 300], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 7, max= 158, per=25.10%, avg=40.66, stdev=26.64, samples=286 iops : min= 1, max= 39, avg= 9.53, stdev= 6.68, samples=286 write: IOPS=10, BW=42.5KiB/s (43.5kB/s)(6296KiB/148090msec); 0 zone resets clat (msec): min=9, max=419, avg=56.28, stdev=38.72 lat (msec): min=9, max=419, avg=56.29, stdev=38.72 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 26], | 30.00th=[ 32], 40.00th=[ 38], 50.00th=[ 45], 60.00th=[ 54], | 70.00th=[ 66], 80.00th=[ 83], 90.00th=[ 108], 95.00th=[ 130], | 99.00th=[ 199], 99.50th=[ 218], 99.90th=[ 275], 99.95th=[ 418], | 99.99th=[ 418] bw ( KiB/s): min= 7, max= 168, per=24.99%, avg=42.23, stdev=26.13, samples=290 iops : min= 1, max= 42, avg= 9.92, stdev= 6.59, samples=290 lat (msec) : 10=3.09%, 20=18.55%, 50=43.95%, 100=24.67%, 250=9.54% lat (msec) : 500=0.16%, 750=0.03% cpu : usr=0.06%, sys=1.89%, ctx=4834, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178692: Mon Sep 7 12:32:54 2026 read: IOPS=10, BW=40.2KiB/s (41.2kB/s)(5940KiB/147801msec) clat (msec): min=4, max=697, avg=37.87, stdev=38.02 lat (msec): min=4, max=697, avg=37.87, stdev=38.02 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 40], 80.00th=[ 54], 90.00th=[ 81], 95.00th=[ 111], | 99.00th=[ 171], 99.50th=[ 197], 99.90th=[ 284], 99.95th=[ 701], | 99.99th=[ 701] bw ( KiB/s): min= 7, max= 167, per=25.10%, avg=40.66, stdev=27.79, samples=285 iops : min= 1, max= 41, avg= 9.53, stdev= 6.97, samples=285 write: IOPS=10, BW=42.9KiB/s (43.0kB/s)(6348KiB/147801msec); 0 zone resets clat (msec): min=8, max=358, avg=57.40, stdev=40.18 lat (msec): min=8, max=358, avg=57.40, stdev=40.18 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 19], 10.00th=[ 22], 20.00th=[ 28], | 30.00th=[ 32], 40.00th=[ 37], 50.00th=[ 45], 60.00th=[ 54], | 70.00th=[ 68], 80.00th=[ 84], 90.00th=[ 107], 95.00th=[ 138], | 99.00th=[ 205], 99.50th=[ 255], 99.90th=[ 275], 99.95th=[ 359], | 99.99th=[ 359] bw ( KiB/s): min= 7, max= 144, per=25.19%, avg=42.56, stdev=25.24, samples=291 iops : min= 1, max= 36, avg=10.00, stdev= 6.37, samples=291 lat (msec) : 10=4.10%, 20=16.80%, 50=45.87%, 100=23.73%, 250=9.11% lat (msec) : 500=0.36%, 750=0.03% cpu : usr=0.06%, sys=1.89%, ctx=4728, 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=178695: Mon Sep 7 12:32:54 2026 read: IOPS=10, BW=40.0KiB/s (41.0kB/s)(6028KiB/147077msec) clat (msec): min=4, max=279, avg=39.32, stdev=35.28 lat (msec): min=4, max=279, avg=39.33, stdev=35.29 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 34], | 70.00th=[ 43], 80.00th=[ 59], 90.00th=[ 88], 95.00th=[ 109], | 99.00th=[ 167], 99.50th=[ 190], 99.90th=[ 266], 99.95th=[ 279], | 99.99th=[ 279] bw ( KiB/s): min= 7, max= 168, per=25.44%, avg=41.21, stdev=27.21, samples=285 iops : min= 1, max= 42, avg= 9.66, stdev= 6.85, samples=285 write: IOPS=10, BW=42.6KiB/s (43.6kB/s)(6260KiB/147077msec); 0 zone resets clat (msec): min=6, max=713, avg=55.80, stdev=42.53 lat (msec): min=6, max=713, avg=55.81, stdev=42.53 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 27], | 30.00th=[ 31], 40.00th=[ 36], 50.00th=[ 44], 60.00th=[ 52], | 70.00th=[ 63], 80.00th=[ 81], 90.00th=[ 109], 95.00th=[ 134], | 99.00th=[ 190], 99.50th=[ 222], 99.90th=[ 355], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 7, max= 135, per=25.16%, avg=42.52, stdev=26.25, samples=287 iops : min= 1, max= 33, avg= 9.99, stdev= 6.59, samples=287 lat (msec) : 10=3.91%, 20=17.97%, 50=44.76%, 100=24.12%, 250=8.92% lat (msec) : 500=0.29%, 750=0.03% cpu : usr=0.07%, sys=1.83%, ctx=4777, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178696: Mon Sep 7 12:32:54 2026 read: IOPS=10, BW=40.9KiB/s (41.9kB/s)(6052KiB/147908msec) clat (msec): min=4, max=257, avg=37.83, stdev=33.48 lat (msec): min=4, max=257, avg=37.83, stdev=33.48 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 32], | 70.00th=[ 41], 80.00th=[ 55], 90.00th=[ 83], 95.00th=[ 107], | 99.00th=[ 169], 99.50th=[ 190], 99.90th=[ 239], 99.95th=[ 257], | 99.99th=[ 257] bw ( KiB/s): min= 7, max= 152, per=25.27%, avg=40.94, stdev=27.60, samples=288 iops : min= 1, max= 38, avg= 9.60, stdev= 6.94, samples=288 write: IOPS=10, BW=42.2KiB/s (43.2kB/s)(6236KiB/147908msec); 0 zone resets clat (msec): min=10, max=716, avg=57.84, stdev=43.01 lat (msec): min=10, max=716, avg=57.85, stdev=43.01 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 27], | 30.00th=[ 32], 40.00th=[ 39], 50.00th=[ 46], 60.00th=[ 56], | 70.00th=[ 68], 80.00th=[ 85], 90.00th=[ 109], 95.00th=[ 130], | 99.00th=[ 207], 99.50th=[ 226], 99.90th=[ 422], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 7, max= 143, per=24.70%, avg=41.74, stdev=24.86, samples=291 iops : min= 1, max= 35, avg= 9.79, stdev= 6.25, samples=291 lat (msec) : 10=3.42%, 20=18.00%, 50=44.34%, 100=24.67%, 250=9.41% lat (msec) : 500=0.13%, 750=0.03% cpu : usr=0.06%, sys=1.80%, ctx=4795, 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=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=162KiB/s (166kB/s), 40.2KiB/s-40.0KiB/s (41.2kB/s-41.0kB/s), io=23.4MiB (24.6MB), run=147077-148090msec WRITE: bw=170KiB/s (174kB/s), 42.2KiB/s-42.9KiB/s (43.2kB/s-43.0kB/s), io=24.6MiB (25.7MB), run=147077-148090msec 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=178734: Mon Sep 7 12:33:40 2026 read: IOPS=10, BW=166KiB/s (170kB/s)(5920KiB/35759msec) clat (usec): min=43, max=224693, avg=52551.31, stdev=35426.91 lat (usec): min=44, max=224695, avg=52552.46, stdev=35426.89 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 63], 10.00th=[ 92], 20.00th=[ 25822], | 30.00th=[ 32375], 40.00th=[ 39060], 50.00th=[ 46400], 60.00th=[ 56361], | 70.00th=[ 67634], 80.00th=[ 81265], 90.00th=[ 94897], 95.00th=[108528], | 99.00th=[185598], 99.50th=[208667], 99.90th=[225444], 99.95th=[225444], | 99.99th=[225444] bw ( KiB/s): min= 31, max= 318, per=25.76%, avg=164.89, stdev=64.65, samples=70 iops : min= 1, max= 19, avg= 9.51, stdev= 4.11, samples=70 write: IOPS=11, BW=178KiB/s (182kB/s)(6368KiB/35759msec); 0 zone resets clat (usec): min=1489, max=436155, avg=40763.72, stdev=45617.22 lat (usec): min=1490, max=436157, avg=40766.16, stdev=45617.74 clat percentiles (usec): | 1.00th=[ 1647], 5.00th=[ 1860], 10.00th=[ 2147], 20.00th=[ 4883], | 30.00th=[ 8848], 40.00th=[ 15926], 50.00th=[ 26346], 60.00th=[ 37487], | 70.00th=[ 50070], 80.00th=[ 71828], 90.00th=[100140], 95.00th=[133694], | 99.00th=[168821], 99.50th=[227541], 99.90th=[434111], 99.95th=[434111], | 99.99th=[434111] bw ( KiB/s): min= 31, max= 381, per=26.35%, avg=177.57, stdev=75.55, samples=70 iops : min= 1, max= 23, avg=10.31, stdev= 4.79, samples=70 lat (usec) : 50=0.26%, 100=4.69%, 250=0.13% lat (msec) : 2=4.43%, 4=4.30%, 10=7.94%, 20=7.55%, 50=32.94% lat (msec) : 100=29.43%, 250=8.20%, 500=0.13% cpu : usr=0.06%, sys=4.47%, ctx=1507, 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=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=178735: Mon Sep 7 12:33:40 2026 read: IOPS=9, BW=159KiB/s (163kB/s)(5744KiB/36015msec) clat (usec): min=42, max=299684, avg=53045.33, stdev=38970.55 lat (usec): min=42, max=299685, avg=53046.71, stdev=38971.16 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 62], 10.00th=[ 82], 20.00th=[ 24773], | 30.00th=[ 34866], 40.00th=[ 40633], 50.00th=[ 47449], 60.00th=[ 54789], | 70.00th=[ 65274], 80.00th=[ 76022], 90.00th=[103285], 95.00th=[116917], | 99.00th=[183501], 99.50th=[267387], 99.90th=[299893], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 31, max= 314, per=25.22%, avg=161.40, stdev=62.21, samples=70 iops : min= 1, max= 19, avg= 9.30, stdev= 3.94, samples=70 write: IOPS=11, BW=182KiB/s (186kB/s)(6544KiB/36015msec); 0 zone resets clat (usec): min=1447, max=431232, avg=41099.28, stdev=45898.71 lat (usec): min=1450, max=431234, avg=41101.42, stdev=45898.89 clat percentiles (usec): | 1.00th=[ 1549], 5.00th=[ 1909], 10.00th=[ 2835], 20.00th=[ 6325], | 30.00th=[ 9110], 40.00th=[ 16450], 50.00th=[ 26870], 60.00th=[ 36439], | 70.00th=[ 51643], 80.00th=[ 71828], 90.00th=[100140], 95.00th=[131597], | 99.00th=[173016], 99.50th=[208667], 99.90th=[429917], 99.95th=[429917], | 99.99th=[429917] bw ( KiB/s): min= 31, max= 382, per=26.87%, avg=181.07, stdev=91.09, samples=71 iops : min= 1, max= 23, avg=10.54, stdev= 5.74, samples=71 lat (usec) : 50=0.26%, 100=4.69%, 250=0.26%, 500=0.13%, 750=0.13% lat (msec) : 2=3.39%, 4=4.04%, 10=9.51%, 20=7.68%, 50=31.38% lat (msec) : 100=28.39%, 250=9.77%, 500=0.39% cpu : usr=0.08%, sys=4.10%, ctx=1507, 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=178736: Mon Sep 7 12:33:40 2026 read: IOPS=10, BW=167KiB/s (171kB/s)(6256KiB/37377msec) clat (usec): min=37, max=241603, avg=51255.27, stdev=36711.20 lat (usec): min=37, max=241604, avg=51256.80, stdev=36711.47 clat percentiles (usec): | 1.00th=[ 43], 5.00th=[ 58], 10.00th=[ 71], 20.00th=[ 22152], | 30.00th=[ 31851], 40.00th=[ 37487], 50.00th=[ 45351], 60.00th=[ 55313], | 70.00th=[ 65799], 80.00th=[ 80217], 90.00th=[ 96994], 95.00th=[115868], | 99.00th=[162530], 99.50th=[198181], 99.90th=[242222], 99.95th=[242222], | 99.99th=[242222] bw ( KiB/s): min= 62, max= 379, per=26.19%, avg=167.59, stdev=70.90, samples=73 iops : min= 3, max= 23, avg= 9.67, stdev= 4.48, samples=73 write: IOPS=10, BW=161KiB/s (165kB/s)(6032KiB/37377msec); 0 zone resets clat (usec): min=1408, max=295746, avg=45528.78, stdev=46711.44 lat (usec): min=1410, max=295748, avg=45530.80, stdev=46711.52 clat percentiles (usec): | 1.00th=[ 1483], 5.00th=[ 1811], 10.00th=[ 2900], 20.00th=[ 6128], | 30.00th=[ 10945], 40.00th=[ 21365], 50.00th=[ 30802], 60.00th=[ 42730], | 70.00th=[ 60556], 80.00th=[ 79168], 90.00th=[108528], 95.00th=[137364], | 99.00th=[221250], 99.50th=[250610], 99.90th=[295699], 99.95th=[295699], | 99.99th=[295699] bw ( KiB/s): min= 31, max= 380, per=23.81%, avg=160.47, stdev=72.49, samples=73 iops : min= 1, max= 23, avg= 9.21, stdev= 4.57, samples=73 lat (usec) : 50=0.52%, 100=5.86%, 250=0.13% lat (msec) : 2=3.91%, 4=2.86%, 10=6.90%, 20=7.81%, 50=31.77% lat (msec) : 100=29.17%, 250=10.81%, 500=0.26% cpu : usr=0.06%, sys=4.14%, ctx=1578, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178737: Mon Sep 7 12:33:40 2026 read: IOPS=10, BW=163KiB/s (167kB/s)(6032KiB/36969msec) clat (usec): min=40, max=228475, avg=52620.24, stdev=38570.10 lat (usec): min=40, max=228477, avg=52621.49, stdev=38570.00 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 62], 10.00th=[ 71], 20.00th=[ 22152], | 30.00th=[ 32900], 40.00th=[ 39060], 50.00th=[ 45876], 60.00th=[ 52691], | 70.00th=[ 66847], 80.00th=[ 81265], 90.00th=[103285], 95.00th=[128451], | 99.00th=[168821], 99.50th=[198181], 99.90th=[227541], 99.95th=[227541], | 99.99th=[227541] bw ( KiB/s): min= 31, max= 378, per=25.17%, avg=161.07, stdev=72.89, samples=72 iops : min= 1, max= 23, avg= 9.25, stdev= 4.59, samples=72 write: IOPS=10, BW=169KiB/s (173kB/s)(6256KiB/36969msec); 0 zone resets clat (usec): min=1379, max=327234, avg=43320.93, stdev=46592.23 lat (usec): min=1382, max=327236, avg=43326.19, stdev=46589.93 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1860], 10.00th=[ 2835], 20.00th=[ 5932], | 30.00th=[ 9503], 40.00th=[ 17695], 50.00th=[ 29230], 60.00th=[ 39060], | 70.00th=[ 53216], 80.00th=[ 76022], 90.00th=[104334], 95.00th=[141558], | 99.00th=[198181], 99.50th=[261096], 99.90th=[329253], 99.95th=[329253], | 99.99th=[329253] bw ( KiB/s): min= 31, max= 411, per=24.93%, avg=168.06, stdev=77.98, samples=72 iops : min= 1, max= 25, avg= 9.69, stdev= 4.93, samples=72 lat (usec) : 50=0.52%, 100=5.21%, 250=0.52%, 1000=0.13% lat (msec) : 2=3.78%, 4=3.91%, 10=7.68%, 20=8.72%, 50=31.64% lat (msec) : 100=26.56%, 250=11.07%, 500=0.26% cpu : usr=0.06%, sys=4.48%, ctx=1569, 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=641KiB/s (656kB/s), 159KiB/s-167KiB/s (163kB/s-171kB/s), io=23.4MiB (24.5MB), run=35759-37377msec WRITE: bw=674KiB/s (690kB/s), 161KiB/s-182KiB/s (165kB/s-186kB/s), io=24.6MiB (25.8MB), run=35759-37377msec rand-rw: (groupid=0, jobs=1): err= 0: pid=178739: Mon Sep 7 12:33:52 2026 read: IOPS=7, BW=123KiB/s (126kB/s)(5920KiB/47962msec) clat (msec): min=7, max=353, avg=52.08, stdev=54.36 lat (msec): min=7, max=353, avg=52.08, stdev=54.36 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 26], 50.00th=[ 32], 60.00th=[ 42], | 70.00th=[ 54], 80.00th=[ 75], 90.00th=[ 110], 95.00th=[ 176], | 99.00th=[ 275], 99.50th=[ 317], 99.90th=[ 355], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 30, max= 476, per=25.92%, avg=127.27, stdev=95.32, samples=90 iops : min= 1, max= 29, avg= 7.12, stdev= 6.00, samples=90 write: IOPS=8, BW=133KiB/s (136kB/s)(6368KiB/47962msec); 0 zone resets clat (msec): min=15, max=357, avg=71.95, stdev=52.73 lat (msec): min=15, max=357, avg=71.96, stdev=52.73 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 22], 10.00th=[ 24], 20.00th=[ 31], | 30.00th=[ 38], 40.00th=[ 44], 50.00th=[ 54], 60.00th=[ 67], | 70.00th=[ 84], 80.00th=[ 113], 90.00th=[ 148], 95.00th=[ 171], | 99.00th=[ 271], 99.50th=[ 284], 99.90th=[ 359], 99.95th=[ 359], | 99.99th=[ 359] bw ( KiB/s): min= 31, max= 415, per=25.86%, avg=133.46, stdev=91.16, samples=93 iops : min= 1, max= 25, avg= 7.51, stdev= 5.74, samples=93 lat (msec) : 10=1.04%, 20=15.10%, 50=40.10%, 100=25.78%, 250=16.41% lat (msec) : 500=1.56% cpu : usr=0.02%, sys=1.44%, ctx=1132, 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=178740: Mon Sep 7 12:33:52 2026 read: IOPS=7, BW=118KiB/s (121kB/s)(5744KiB/48743msec) clat (msec): min=7, max=356, avg=50.95, stdev=51.93 lat (msec): min=7, max=356, avg=50.95, stdev=51.93 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 40], | 70.00th=[ 50], 80.00th=[ 77], 90.00th=[ 122], 95.00th=[ 163], | 99.00th=[ 247], 99.50th=[ 347], 99.90th=[ 355], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 30, max= 415, per=25.06%, avg=123.03, stdev=92.91, samples=92 iops : min= 1, max= 25, avg= 6.85, stdev= 5.82, samples=92 write: IOPS=8, BW=134KiB/s (137kB/s)(6544KiB/48743msec); 0 zone resets clat (msec): min=13, max=338, avg=74.33, stdev=58.71 lat (msec): min=13, max=338, avg=74.33, stdev=58.71 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 21], 10.00th=[ 24], 20.00th=[ 29], | 30.00th=[ 36], 40.00th=[ 42], 50.00th=[ 52], 60.00th=[ 67], | 70.00th=[ 89], 80.00th=[ 123], 90.00th=[ 161], 95.00th=[ 197], | 99.00th=[ 266], 99.50th=[ 275], 99.90th=[ 338], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 31, max= 571, per=26.74%, avg=137.97, stdev=105.95, samples=93 iops : min= 1, max= 35, avg= 7.80, stdev= 6.66, samples=93 lat (msec) : 10=1.30%, 20=13.54%, 50=44.14%, 100=20.05%, 250=19.66% lat (msec) : 500=1.30% cpu : usr=0.05%, sys=1.52%, ctx=1190, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178741: Mon Sep 7 12:33:52 2026 read: IOPS=8, BW=130KiB/s (133kB/s)(6256KiB/48179msec) clat (msec): min=6, max=250, avg=50.75, stdev=45.54 lat (msec): min=6, max=250, avg=50.75, stdev=45.54 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 18], | 30.00th=[ 21], 40.00th=[ 28], 50.00th=[ 34], 60.00th=[ 41], | 70.00th=[ 56], 80.00th=[ 79], 90.00th=[ 117], 95.00th=[ 150], | 99.00th=[ 209], 99.50th=[ 226], 99.90th=[ 251], 99.95th=[ 251], | 99.99th=[ 251] bw ( KiB/s): min= 31, max= 508, per=26.96%, avg=132.38, stdev=106.36, samples=92 iops : min= 1, max= 31, avg= 7.45, stdev= 6.71, samples=92 write: IOPS=7, BW=125KiB/s (128kB/s)(6032KiB/48179msec); 0 zone resets clat (msec): min=12, max=531, avg=75.07, stdev=59.13 lat (msec): min=12, max=531, avg=75.08, stdev=59.13 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 33], | 30.00th=[ 39], 40.00th=[ 46], 50.00th=[ 57], 60.00th=[ 69], | 70.00th=[ 83], 80.00th=[ 109], 90.00th=[ 153], 95.00th=[ 194], | 99.00th=[ 284], 99.50th=[ 347], 99.90th=[ 531], 99.95th=[ 531], | 99.99th=[ 531] bw ( KiB/s): min= 31, max= 381, per=24.34%, avg=125.60, stdev=85.12, samples=92 iops : min= 1, max= 23, avg= 7.01, stdev= 5.35, samples=92 lat (msec) : 10=0.91%, 20=14.32%, 50=40.49%, 100=25.52%, 250=17.84% lat (msec) : 500=0.78%, 750=0.13% cpu : usr=0.05%, sys=1.44%, ctx=1162, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178742: Mon Sep 7 12:33:52 2026 read: IOPS=7, BW=124KiB/s (127kB/s)(6032KiB/48553msec) clat (msec): min=5, max=312, avg=51.95, stdev=48.22 lat (msec): min=5, max=312, avg=51.96, stdev=48.22 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 22], 40.00th=[ 27], 50.00th=[ 33], 60.00th=[ 45], | 70.00th=[ 61], 80.00th=[ 75], 90.00th=[ 118], 95.00th=[ 159], | 99.00th=[ 230], 99.50th=[ 275], 99.90th=[ 313], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 30, max= 571, per=26.60%, avg=130.62, stdev=98.02, samples=89 iops : min= 1, max= 35, avg= 7.34, stdev= 6.16, samples=89 write: IOPS=8, BW=129KiB/s (132kB/s)(6256KiB/48553msec); 0 zone resets clat (msec): min=15, max=501, avg=73.94, stdev=59.14 lat (msec): min=15, max=501, avg=73.95, stdev=59.14 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 31], | 30.00th=[ 37], 40.00th=[ 43], 50.00th=[ 52], 60.00th=[ 65], | 70.00th=[ 86], 80.00th=[ 121], 90.00th=[ 155], 95.00th=[ 184], | 99.00th=[ 271], 99.50th=[ 372], 99.90th=[ 502], 99.95th=[ 502], | 99.99th=[ 502] bw ( KiB/s): min= 30, max= 473, per=24.87%, avg=128.33, stdev=93.77, samples=94 iops : min= 1, max= 29, avg= 7.18, stdev= 5.90, samples=94 lat (msec) : 10=1.43%, 20=13.54%, 50=40.49%, 100=24.87%, 250=18.62% lat (msec) : 500=0.91%, 750=0.13% cpu : usr=0.05%, sys=1.52%, ctx=1237, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=491KiB/s (503kB/s), 118KiB/s-130KiB/s (121kB/s-133kB/s), io=23.4MiB (24.5MB), run=47962-48743msec WRITE: bw=517KiB/s (529kB/s), 125KiB/s-134KiB/s (128kB/s-137kB/s), io=24.6MiB (25.8MB), run=47962-48743msec 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=178755: Mon Sep 7 12:34:07 2026 read: IOPS=2, BW=2261KiB/s (2315kB/s)(7168KiB/3170msec) clat (usec): min=513, max=336782, avg=202613.64, stdev=107205.03 lat (usec): min=514, max=336783, avg=202616.66, stdev=107204.18 clat percentiles (usec): | 1.00th=[ 515], 5.00th=[ 515], 10.00th=[ 515], 20.00th=[168821], | 30.00th=[189793], 40.00th=[189793], 50.00th=[210764], 60.00th=[212861], | 70.00th=[212861], 80.00th=[295699], 90.00th=[337642], 95.00th=[337642], | 99.00th=[337642], 99.50th=[337642], 99.90th=[337642], 99.95th=[337642], | 99.99th=[337642] bw ( KiB/s): min= 1750, max= 4071, per=72.08%, avg=2977.75, stdev=1258.55, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=1, BW=1615KiB/s (1654kB/s)(5120KiB/3170msec); 0 zone resets clat (msec): min=205, max=423, avg=270.12, stdev=87.28 lat (msec): min=206, max=423, avg=270.80, stdev=86.91 clat percentiles (msec): | 1.00th=[ 207], 5.00th=[ 207], 10.00th=[ 207], 20.00th=[ 207], | 30.00th=[ 234], 40.00th=[ 234], 50.00th=[ 234], 60.00th=[ 234], | 70.00th=[ 255], 80.00th=[ 255], 90.00th=[ 422], 95.00th=[ 422], | 99.00th=[ 422], 99.50th=[ 422], 99.90th=[ 422], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 2011, max= 3923, per=45.93%, avg=2656.33, stdev=1097.03, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=8.33% lat (msec) : 250=58.33%, 500=33.33% cpu : usr=0.03%, sys=14.83%, ctx=188, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178756: Mon Sep 7 12:34:07 2026 read: IOPS=0, BW=413KiB/s (423kB/s)(2048KiB/4957msec) clat (msec): min=185, max=293, avg=239.50, stdev=76.67 lat (msec): min=185, max=293, avg=239.51, stdev=76.67 clat percentiles (msec): | 1.00th=[ 186], 5.00th=[ 186], 10.00th=[ 186], 20.00th=[ 186], | 30.00th=[ 186], 40.00th=[ 186], 50.00th=[ 186], 60.00th=[ 296], | 70.00th=[ 296], 80.00th=[ 296], 90.00th=[ 296], 95.00th=[ 296], | 99.00th=[ 296], 99.50th=[ 296], 99.90th=[ 296], 99.95th=[ 296], | 99.99th=[ 296] bw ( KiB/s): min= 1494, max= 2035, per=42.71%, avg=1764.50, stdev=382.54, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2066KiB/s (2115kB/s)(10.0MiB/4957msec); 0 zone resets clat (msec): min=210, max=735, avg=439.47, stdev=140.04 lat (msec): min=212, max=735, avg=439.83, stdev=139.77 clat percentiles (msec): | 1.00th=[ 211], 5.00th=[ 211], 10.00th=[ 211], 20.00th=[ 288], | 30.00th=[ 388], 40.00th=[ 426], 50.00th=[ 439], 60.00th=[ 447], | 70.00th=[ 451], 80.00th=[ 489], 90.00th=[ 527], 95.00th=[ 735], | 99.00th=[ 735], 99.50th=[ 735], 99.90th=[ 735], 99.95th=[ 735], | 99.99th=[ 735] bw ( KiB/s): min= 1494, max= 4055, per=43.01%, avg=2487.86, stdev=1013.13, samples=7 iops : min= 1, max= 3, avg= 1.57, stdev= 0.98, samples=7 lat (msec) : 250=16.67%, 500=66.67%, 750=16.67% cpu : usr=0.00%, sys=11.70%, ctx=156, 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=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=178758: Mon Sep 7 12:34:07 2026 read: IOPS=1, BW=1406KiB/s (1440kB/s)(6144KiB/4370msec) clat (usec): min=439, max=379203, avg=131228.84, stdev=139957.27 lat (usec): min=441, max=379205, avg=131230.54, stdev=139957.47 clat percentiles (usec): | 1.00th=[ 441], 5.00th=[ 441], 10.00th=[ 441], 20.00th=[ 494], | 30.00th=[ 494], 40.00th=[114820], 50.00th=[114820], 60.00th=[119014], | 70.00th=[173016], 80.00th=[173016], 90.00th=[379585], 95.00th=[379585], | 99.00th=[379585], 99.50th=[379585], 99.90th=[379585], 99.95th=[379585], | 99.99th=[379585] bw ( KiB/s): min= 1914, max= 4071, per=81.01%, avg=3346.67, stdev=1240.75, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1406KiB/s (1440kB/s)(6144KiB/4370msec); 0 zone resets clat (msec): min=239, max=873, avg=542.22, stdev=230.96 lat (msec): min=239, max=873, avg=542.29, stdev=230.95 clat percentiles (msec): | 1.00th=[ 241], 5.00th=[ 241], 10.00th=[ 241], 20.00th=[ 359], | 30.00th=[ 359], 40.00th=[ 498], 50.00th=[ 498], 60.00th=[ 575], | 70.00th=[ 709], 80.00th=[ 709], 90.00th=[ 877], 95.00th=[ 877], | 99.00th=[ 877], 99.50th=[ 877], 99.90th=[ 877], 99.95th=[ 877], | 99.99th=[ 877] bw ( KiB/s): min= 1605, max= 2043, per=33.38%, avg=1930.83, stdev=167.36, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (usec) : 500=16.67% lat (msec) : 250=33.33%, 500=25.00%, 750=16.67%, 1000=8.33% cpu : usr=0.00%, sys=8.35%, ctx=136, 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=178760: Mon Sep 7 12:34:07 2026 read: IOPS=1, BW=1071KiB/s (1096kB/s)(5120KiB/4782msec) clat (usec): min=537, max=615075, avg=270800.41, stdev=222292.26 lat (usec): min=539, max=615076, avg=270801.78, stdev=222292.41 clat percentiles (usec): | 1.00th=[ 537], 5.00th=[ 537], 10.00th=[ 537], 20.00th=[ 537], | 30.00th=[198181], 40.00th=[198181], 50.00th=[248513], 60.00th=[248513], | 70.00th=[291505], 80.00th=[291505], 90.00th=[616563], 95.00th=[616563], | 99.00th=[616563], 99.50th=[616563], 99.90th=[616563], 99.95th=[616563], | 99.99th=[616563] bw ( KiB/s): min= 3828, max= 4071, per=95.61%, avg=3949.50, stdev=171.83, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1499KiB/s (1535kB/s)(7168KiB/4782msec); 0 zone resets clat (msec): min=205, max=742, avg=436.07, stdev=182.15 lat (msec): min=205, max=743, avg=436.18, stdev=182.18 clat percentiles (msec): | 1.00th=[ 205], 5.00th=[ 205], 10.00th=[ 205], 20.00th=[ 330], | 30.00th=[ 347], 40.00th=[ 347], 50.00th=[ 347], 60.00th=[ 518], | 70.00th=[ 518], 80.00th=[ 567], 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= 1961, max= 4087, per=40.76%, avg=2357.33, stdev=847.77, samples=6 iops : min= 1, max= 3, avg= 1.33, stdev= 0.82, samples=6 lat (usec) : 750=8.33% lat (msec) : 250=25.00%, 500=33.33%, 750=33.33% cpu : usr=0.02%, sys=8.26%, ctx=172, 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=4132KiB/s (4231kB/s), 413KiB/s-2261KiB/s (423kB/s-2315kB/s), io=20.0MiB (20.0MB), run=3170-4957msec WRITE: bw=5784KiB/s (5923kB/s), 1406KiB/s-2066KiB/s (1440kB/s-2115kB/s), io=28.0MiB (29.4MB), run=3170-4957msec rand-rw: (groupid=0, jobs=1): err= 0: pid=178757: Mon Sep 7 12:34:08 2026 read: IOPS=1, BW=1568KiB/s (1605kB/s)(7168KiB/4572msec) clat (msec): min=88, max=470, avg=236.79, stdev=130.17 lat (msec): min=88, max=470, avg=236.79, stdev=130.17 clat percentiles (msec): | 1.00th=[ 89], 5.00th=[ 89], 10.00th=[ 89], 20.00th=[ 133], | 30.00th=[ 178], 40.00th=[ 178], 50.00th=[ 188], 60.00th=[ 292], | 70.00th=[ 292], 80.00th=[ 309], 90.00th=[ 472], 95.00th=[ 472], | 99.00th=[ 472], 99.50th=[ 472], 99.90th=[ 472], 99.95th=[ 472], | 99.99th=[ 472] bw ( KiB/s): min= 1969, max= 4039, per=80.98%, avg=2981.75, stdev=1154.86, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=1, BW=1120KiB/s (1147kB/s)(5120KiB/4572msec); 0 zone resets clat (msec): min=410, max=599, avg=505.24, stdev=75.80 lat (msec): min=410, max=600, avg=505.33, stdev=75.80 clat percentiles (msec): | 1.00th=[ 409], 5.00th=[ 409], 10.00th=[ 409], 20.00th=[ 409], | 30.00th=[ 447], 40.00th=[ 447], 50.00th=[ 531], 60.00th=[ 531], | 70.00th=[ 542], 80.00th=[ 542], 90.00th=[ 600], 95.00th=[ 600], | 99.00th=[ 600], 99.50th=[ 600], 99.90th=[ 600], 99.95th=[ 600], | 99.99th=[ 600] bw ( KiB/s): min= 1996, max= 2027, per=39.14%, avg=2017.25, stdev=14.66, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 100=8.33%, 250=25.00%, 500=41.67%, 750=25.00% cpu : usr=0.00%, sys=4.22%, ctx=94, 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=178759: Mon Sep 7 12:34:08 2026 read: IOPS=0, BW=389KiB/s (398kB/s)(2048KiB/5268msec) clat (msec): min=176, max=415, avg=296.02, stdev=168.73 lat (msec): min=176, max=415, avg=296.03, stdev=168.73 clat percentiles (msec): | 1.00th=[ 178], 5.00th=[ 178], 10.00th=[ 178], 20.00th=[ 178], | 30.00th=[ 178], 40.00th=[ 178], 50.00th=[ 178], 60.00th=[ 418], | 70.00th=[ 418], 80.00th=[ 418], 90.00th=[ 418], 95.00th=[ 418], | 99.00th=[ 418], 99.50th=[ 418], 99.90th=[ 418], 99.95th=[ 418], | 99.99th=[ 418] bw ( KiB/s): min= 1759, max= 2019, per=51.30%, avg=1889.00, stdev=183.85, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1944KiB/s (1990kB/s)(10.0MiB/5268msec); 0 zone resets clat (msec): min=139, max=1198, avg=459.05, stdev=307.45 lat (msec): min=139, max=1198, avg=459.14, stdev=307.45 clat percentiles (msec): | 1.00th=[ 140], 5.00th=[ 140], 10.00th=[ 140], 20.00th=[ 220], | 30.00th=[ 262], 40.00th=[ 279], 50.00th=[ 351], 60.00th=[ 414], | 70.00th=[ 481], 80.00th=[ 600], 90.00th=[ 651], 95.00th=[ 1200], | 99.00th=[ 1200], 99.50th=[ 1200], 99.90th=[ 1200], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 1961, max= 4079, per=50.36%, avg=2595.43, stdev=1005.58, samples=7 iops : min= 1, max= 3, avg= 1.57, stdev= 0.98, samples=7 lat (msec) : 250=25.00%, 500=50.00%, 750=16.67%, 2000=8.33% cpu : usr=0.00%, sys=3.95%, ctx=110, 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=178761: Mon Sep 7 12:34:08 2026 read: IOPS=1, BW=1248KiB/s (1277kB/s)(6144KiB/4925msec) clat (msec): min=121, max=579, avg=259.17, stdev=172.53 lat (msec): min=121, max=579, avg=259.17, stdev=172.53 clat percentiles (msec): | 1.00th=[ 122], 5.00th=[ 122], 10.00th=[ 122], 20.00th=[ 148], | 30.00th=[ 148], 40.00th=[ 176], 50.00th=[ 176], 60.00th=[ 203], | 70.00th=[ 330], 80.00th=[ 330], 90.00th=[ 584], 95.00th=[ 584], | 99.00th=[ 584], 99.50th=[ 584], 99.90th=[ 584], 99.95th=[ 584], | 99.99th=[ 584] bw ( KiB/s): min= 1996, max= 3923, per=67.74%, avg=2494.25, stdev=952.66, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=1, BW=1248KiB/s (1277kB/s)(6144KiB/4925msec); 0 zone resets clat (msec): min=226, max=816, avg=519.58, stdev=195.71 lat (msec): min=226, max=816, avg=519.69, stdev=195.73 clat percentiles (msec): | 1.00th=[ 228], 5.00th=[ 228], 10.00th=[ 228], 20.00th=[ 451], | 30.00th=[ 451], 40.00th=[ 456], 50.00th=[ 456], 60.00th=[ 575], | 70.00th=[ 600], 80.00th=[ 600], 90.00th=[ 818], 95.00th=[ 818], | 99.00th=[ 818], 99.50th=[ 818], 99.90th=[ 818], 99.95th=[ 818], | 99.99th=[ 818] bw ( KiB/s): min= 1961, max= 2039, per=38.86%, avg=2003.00, stdev=35.52, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 250=41.67%, 500=25.00%, 750=25.00%, 1000=8.33% cpu : usr=0.08%, sys=4.37%, ctx=88, 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=178762: Mon Sep 7 12:34:08 2026 read: IOPS=0, BW=921KiB/s (943kB/s)(5120KiB/5562msec) clat (msec): min=86, max=550, avg=262.77, stdev=230.26 lat (msec): min=86, max=550, avg=262.77, stdev=230.26 clat percentiles (msec): | 1.00th=[ 87], 5.00th=[ 87], 10.00th=[ 87], 20.00th=[ 87], | 30.00th=[ 90], 40.00th=[ 90], 50.00th=[ 111], 60.00th=[ 111], | 70.00th=[ 477], 80.00th=[ 477], 90.00th=[ 550], 95.00th=[ 550], | 99.00th=[ 550], 99.50th=[ 550], 99.90th=[ 550], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 1996, max= 2039, per=54.92%, avg=2022.00, stdev=22.87, samples=3 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=3 write: IOPS=1, BW=1289KiB/s (1320kB/s)(7168KiB/5562msec); 0 zone resets clat (msec): min=95, max=1403, avg=559.03, stdev=532.47 lat (msec): min=95, max=1403, avg=559.93, stdev=532.42 clat percentiles (msec): | 1.00th=[ 96], 5.00th=[ 96], 10.00th=[ 96], 20.00th=[ 111], | 30.00th=[ 146], 40.00th=[ 146], 50.00th=[ 460], 60.00th=[ 514], | 70.00th=[ 514], 80.00th=[ 1183], 90.00th=[ 1401], 95.00th=[ 1401], | 99.00th=[ 1401], 99.50th=[ 1401], 99.90th=[ 1401], 99.95th=[ 1401], | 99.99th=[ 1401] bw ( KiB/s): min= 1961, max= 2027, per=38.82%, avg=2000.75, stdev=29.58, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 100=25.00%, 250=25.00%, 500=16.67%, 750=16.67%, 2000=16.67% cpu : usr=0.00%, sys=2.81%, ctx=93, 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=3682KiB/s (3770kB/s), 389KiB/s-1568KiB/s (398kB/s-1605kB/s), io=20.0MiB (20.0MB), run=4572-5562msec WRITE: bw=5155KiB/s (5279kB/s), 1120KiB/s-1944KiB/s (1147kB/s-1990kB/s), io=28.0MiB (29.4MB), run=4572-5562msec 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=178774: Mon Sep 7 12:34:21 2026 read: IOPS=1, BW=4301KiB/s (4404kB/s)(12.0MiB/2857msec) clat (msec): min=849, max=977, avg=901.84, stdev=67.17 lat (msec): min=849, max=977, avg=901.84, stdev=67.17 clat percentiles (msec): | 1.00th=[ 852], 5.00th=[ 852], 10.00th=[ 852], 20.00th=[ 852], | 30.00th=[ 852], 40.00th=[ 877], 50.00th=[ 877], 60.00th=[ 877], | 70.00th=[ 978], 80.00th=[ 978], 90.00th=[ 978], 95.00th=[ 978], | 99.00th=[ 978], 99.50th=[ 978], 99.90th=[ 978], 99.95th=[ 978], | 99.99th=[ 978] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=100.00% cpu : usr=0.00%, sys=10.54%, ctx=426, 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=178775: Mon Sep 7 12:34:21 2026 read: IOPS=0, BW=1318KiB/s (1350kB/s)(4096KiB/3107msec) clat (nsec): min=1029.2M, max=1029.2M, avg=1029156957.00, stdev= 0.00 lat (nsec): min=1029.2M, max=1029.2M, avg=1029159596.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1028], 5.00th=[ 1028], 10.00th=[ 1028], 20.00th=[ 1028], | 30.00th=[ 1028], 40.00th=[ 1028], 50.00th=[ 1028], 60.00th=[ 1028], | 70.00th=[ 1028], 80.00th=[ 1028], 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= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2637KiB/s (2700kB/s)(8192KiB/3107msec); 0 zone resets clat (msec): min=724, max=1200, avg=962.50, stdev=336.99 lat (msec): min=724, max=1201, avg=962.90, stdev=337.05 clat percentiles (msec): | 1.00th=[ 726], 5.00th=[ 726], 10.00th=[ 726], 20.00th=[ 726], | 30.00th=[ 726], 40.00th=[ 726], 50.00th=[ 726], 60.00th=[ 1200], | 70.00th=[ 1200], 80.00th=[ 1200], 90.00th=[ 1200], 95.00th=[ 1200], | 99.00th=[ 1200], 99.50th=[ 1200], 99.90th=[ 1200], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 8175, max= 8175, per=85.73%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.06%, ctx=198, 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=178776: Mon Sep 7 12:34:21 2026 write: IOPS=0, BW=3576KiB/s (3662kB/s)(12.0MiB/3436msec); 0 zone resets clat (msec): min=703, max=1811, avg=1127.17, stdev=598.36 lat (msec): min=705, max=1812, avg=1128.24, stdev=597.68 clat percentiles (msec): | 1.00th=[ 701], 5.00th=[ 701], 10.00th=[ 701], 20.00th=[ 701], | 30.00th=[ 701], 40.00th=[ 869], 50.00th=[ 869], 60.00th=[ 869], | 70.00th=[ 1804], 80.00th=[ 1804], 90.00th=[ 1804], 95.00th=[ 1804], | 99.00th=[ 1804], 99.50th=[ 1804], 99.90th=[ 1804], 99.95th=[ 1804], | 99.99th=[ 1804] bw ( KiB/s): min= 8143, max= 8175, per=85.56%, avg=8159.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.12%, sys=2.91%, ctx=47, 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=178777: Mon Sep 7 12:34:21 2026 write: IOPS=0, BW=3949KiB/s (4043kB/s)(12.0MiB/3112msec); 0 zone resets clat (msec): min=790, max=1227, avg=944.92, stdev=245.07 lat (msec): min=792, max=1229, avg=946.30, stdev=245.59 clat percentiles (msec): | 1.00th=[ 793], 5.00th=[ 793], 10.00th=[ 793], 20.00th=[ 793], | 30.00th=[ 793], 40.00th=[ 818], 50.00th=[ 818], 60.00th=[ 818], | 70.00th=[ 1234], 80.00th=[ 1234], 90.00th=[ 1234], 95.00th=[ 1234], | 99.00th=[ 1234], 99.50th=[ 1234], 99.90th=[ 1234], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 8143, max= 8175, per=85.56%, avg=8159.00, 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=0.00%, sys=2.73%, ctx=51, 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=5273KiB/s (5400kB/s), 1318KiB/s-4301KiB/s (1350kB/s-4404kB/s), io=16.0MiB (16.8MB), run=2857-3107msec WRITE: bw=9537KiB/s (9766kB/s), 2637KiB/s-3949KiB/s (2700kB/s-4043kB/s), io=32.0MiB (33.6MB), run=3107-3436msec rand-rw: (groupid=0, jobs=1): err= 0: pid=178769: Mon Sep 7 12:34:22 2026 read: IOPS=0, BW=3594KiB/s (3680kB/s)(12.0MiB/3419msec) clat (msec): min=577, max=1433, avg=1115.25, stdev=468.55 lat (msec): min=577, max=1433, avg=1115.25, stdev=468.55 clat percentiles (msec): | 1.00th=[ 575], 5.00th=[ 575], 10.00th=[ 575], 20.00th=[ 575], | 30.00th=[ 575], 40.00th=[ 1334], 50.00th=[ 1334], 60.00th=[ 1334], | 70.00th=[ 1435], 80.00th=[ 1435], 90.00th=[ 1435], 95.00th=[ 1435], | 99.00th=[ 1435], 99.50th=[ 1435], 99.90th=[ 1435], 99.95th=[ 1435], | 99.99th=[ 1435] bw ( KiB/s): min= 8015, max= 8143, per=100.00%, avg=8079.00, stdev=90.51, 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=1.49%, ctx=51, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178770: Mon Sep 7 12:34:22 2026 read: IOPS=0, BW=1131KiB/s (1158kB/s)(4096KiB/3622msec) clat (nsec): min=1519.6M, max=1519.6M, avg=1519570636.00, stdev= 0.00 lat (nsec): min=1519.6M, max=1519.6M, avg=1519573080.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1519], 5.00th=[ 1519], 10.00th=[ 1519], 20.00th=[ 1519], | 30.00th=[ 1519], 40.00th=[ 1519], 50.00th=[ 1519], 60.00th=[ 1519], | 70.00th=[ 1519], 80.00th=[ 1519], 90.00th=[ 1519], 95.00th=[ 1519], | 99.00th=[ 1519], 99.50th=[ 1519], 99.90th=[ 1519], 99.95th=[ 1519], | 99.99th=[ 1519] bw ( KiB/s): min= 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=2262KiB/s (2316kB/s)(8192KiB/3622msec); 0 zone resets clat (msec): min=982, max=1012, avg=997.45, stdev=21.56 lat (msec): min=982, max=1013, avg=997.79, stdev=21.59 clat percentiles (msec): | 1.00th=[ 986], 5.00th=[ 986], 10.00th=[ 986], 20.00th=[ 986], | 30.00th=[ 986], 40.00th=[ 986], 50.00th=[ 986], 60.00th=[ 1011], | 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= 8159, max= 8159, per=90.19%, avg=8159.00, 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=0.06%, sys=2.79%, ctx=47, 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=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=178771: Mon Sep 7 12:34:22 2026 write: IOPS=1, BW=6704KiB/s (6865kB/s)(12.0MiB/1833msec); 0 zone resets clat (msec): min=299, max=1151, avg=588.52, stdev=487.94 lat (msec): min=299, max=1152, avg=588.92, stdev=487.92 clat percentiles (msec): | 1.00th=[ 300], 5.00th=[ 300], 10.00th=[ 300], 20.00th=[ 300], | 30.00th=[ 300], 40.00th=[ 313], 50.00th=[ 313], 60.00th=[ 313], | 70.00th=[ 1150], 80.00th=[ 1150], 90.00th=[ 1150], 95.00th=[ 1150], | 99.00th=[ 1150], 99.50th=[ 1150], 99.90th=[ 1150], 99.95th=[ 1150], | 99.99th=[ 1150] bw ( KiB/s): min= 6168, max= 8015, per=78.39%, avg=7091.50, stdev=1306.03, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=66.67%, 2000=33.33% cpu : usr=0.00%, sys=4.53%, ctx=52, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178772: Mon Sep 7 12:34:22 2026 write: IOPS=1, BW=5011KiB/s (5132kB/s)(12.0MiB/2452msec); 0 zone resets clat (msec): min=308, max=1216, avg=772.83, stdev=454.25 lat (msec): min=309, max=1216, avg=773.20, stdev=454.08 clat percentiles (msec): | 1.00th=[ 309], 5.00th=[ 309], 10.00th=[ 309], 20.00th=[ 309], | 30.00th=[ 309], 40.00th=[ 793], 50.00th=[ 793], 60.00th=[ 793], | 70.00th=[ 1217], 80.00th=[ 1217], 90.00th=[ 1217], 95.00th=[ 1217], | 99.00th=[ 1217], 99.50th=[ 1217], 99.90th=[ 1217], 99.95th=[ 1217], | 99.99th=[ 1217] bw ( KiB/s): min= 7772, max= 8159, per=88.06%, avg=7965.50, stdev=273.65, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.84%, 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 Run status group 0 (all jobs): READ: bw=4523KiB/s (4632kB/s), 1131KiB/s-3594KiB/s (1158kB/s-3680kB/s), io=16.0MiB (16.8MB), run=3419-3622msec WRITE: bw=9047KiB/s (9264kB/s), 2262KiB/s-6704KiB/s (2316kB/s-6865kB/s), io=32.0MiB (33.6MB), run=1833-3622msec