== sanity test 398b: DIO and buffer IO race ============== 16:02:41 (1782244961) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.11879 s, 9.8 MB/s mix direct rw 4096 by fio with 4 jobs... mix buffer rw 4096 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=145150: Tue Jun 23 16:05:08 2026 read: IOPS=11, BW=46.7KiB/s (47.8kB/s)(5992KiB/128300msec) clat (usec): min=33, max=986215, avg=42459.09, stdev=41623.19 lat (usec): min=34, max=986216, avg=42460.57, stdev=41623.06 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 60], 10.00th=[ 180], 20.00th=[ 19530], | 30.00th=[ 25035], 40.00th=[ 30278], 50.00th=[ 35390], 60.00th=[ 41681], | 70.00th=[ 51643], 80.00th=[ 61604], 90.00th=[ 79168], 95.00th=[ 93848], | 99.00th=[162530], 99.50th=[181404], 99.90th=[574620], 99.95th=[985662], | 99.99th=[985662] bw ( KiB/s): min= 7, max= 111, per=25.18%, avg=46.59, stdev=20.12, samples=251 iops : min= 1, max= 27, avg=11.01, stdev= 5.07, samples=251 write: IOPS=12, BW=49.1KiB/s (50.2kB/s)(6296KiB/128300msec); 0 zone resets clat (usec): min=1106, max=501578, avg=40826.48, stdev=41179.53 lat (usec): min=1106, max=501580, avg=40829.23, stdev=41180.00 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1418], 10.00th=[ 2073], 20.00th=[ 4621], | 30.00th=[ 8848], 40.00th=[ 17957], 50.00th=[ 30540], 60.00th=[ 43254], | 70.00th=[ 55837], 80.00th=[ 71828], 90.00th=[ 93848], 95.00th=[116917], | 99.00th=[168821], 99.50th=[191890], 99.90th=[287310], 99.95th=[501220], | 99.99th=[501220] bw ( KiB/s): min= 7, max= 128, per=25.48%, avg=49.18, stdev=20.36, samples=250 iops : min= 1, max= 32, avg=11.67, stdev= 5.11, samples=250 lat (usec) : 50=0.59%, 100=3.84%, 250=0.52%, 500=0.13% lat (msec) : 2=4.98%, 4=4.00%, 10=7.91%, 20=9.51%, 50=35.03% lat (msec) : 100=27.31%, 250=6.02%, 500=0.07%, 750=0.07%, 1000=0.03% cpu : usr=0.08%, sys=5.43%, ctx=6824, 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=145152: Tue Jun 23 16:05:08 2026 read: IOPS=11, BW=47.1KiB/s (48.3kB/s)(5940KiB/125988msec) clat (usec): min=32, max=950777, avg=41241.41, stdev=40211.16 lat (usec): min=33, max=950779, avg=41246.02, stdev=40210.26 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 59], 10.00th=[ 103], 20.00th=[ 19530], | 30.00th=[ 24249], 40.00th=[ 29492], 50.00th=[ 34866], 60.00th=[ 41157], | 70.00th=[ 50070], 80.00th=[ 61080], 90.00th=[ 78119], 95.00th=[ 91751], | 99.00th=[137364], 99.50th=[166724], 99.90th=[608175], 99.95th=[952108], | 99.99th=[952108] bw ( KiB/s): min= 7, max= 103, per=25.68%, avg=47.51, stdev=19.16, samples=244 iops : min= 1, max= 25, avg=11.25, stdev= 4.83, samples=244 write: IOPS=12, BW=50.4KiB/s (51.6kB/s)(6348KiB/125988msec); 0 zone resets clat (usec): min=1098, max=324888, avg=40502.64, stdev=41416.24 lat (usec): min=1100, max=324889, avg=40515.47, stdev=41412.24 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1434], 10.00th=[ 2057], 20.00th=[ 4555], | 30.00th=[ 9503], 40.00th=[ 19530], 50.00th=[ 30016], 60.00th=[ 40633], | 70.00th=[ 52691], 80.00th=[ 67634], 90.00th=[ 95945], 95.00th=[122160], | 99.00th=[181404], 99.50th=[202376], 99.90th=[274727], 99.95th=[325059], | 99.99th=[325059] bw ( KiB/s): min= 7, max= 127, per=26.16%, avg=50.49, stdev=20.62, samples=245 iops : min= 1, max= 31, avg=12.00, stdev= 5.18, samples=245 lat (usec) : 50=0.78%, 100=4.00%, 250=0.46%, 500=0.16%, 750=0.07% lat (usec) : 1000=0.07% lat (msec) : 2=4.85%, 4=4.52%, 10=6.84%, 20=9.31%, 50=37.60% lat (msec) : 100=24.97%, 250=6.22%, 500=0.10%, 750=0.03%, 1000=0.03% cpu : usr=0.07%, sys=5.53%, ctx=6632, 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=145154: Tue Jun 23 16:05:08 2026 read: IOPS=11, BW=47.7KiB/s (48.8kB/s)(6028KiB/126478msec) clat (usec): min=28, max=425366, avg=40026.66, stdev=32172.46 lat (usec): min=28, max=425367, avg=40030.44, stdev=32171.04 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 58], 10.00th=[ 100], 20.00th=[ 18482], | 30.00th=[ 24511], 40.00th=[ 29492], 50.00th=[ 33817], 60.00th=[ 40633], | 70.00th=[ 48497], 80.00th=[ 61080], 90.00th=[ 76022], 95.00th=[ 93848], | 99.00th=[135267], 99.50th=[170918], 99.90th=[325059], 99.95th=[425722], | 99.99th=[425722] bw ( KiB/s): min= 7, max= 158, per=25.78%, avg=47.70, stdev=21.97, samples=246 iops : min= 1, max= 39, avg=11.30, stdev= 5.51, samples=246 write: IOPS=12, BW=49.5KiB/s (50.7kB/s)(6260KiB/126478msec); 0 zone resets clat (usec): min=1074, max=1162.2k, avg=41984.38, stdev=51531.23 lat (usec): min=1076, max=1162.2k, avg=41987.58, stdev=51530.76 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1418], 10.00th=[ 2212], | 20.00th=[ 4686], 30.00th=[ 8979], 40.00th=[ 20317], | 50.00th=[ 30540], 60.00th=[ 42206], 70.00th=[ 56361], | 80.00th=[ 70779], 90.00th=[ 95945], 95.00th=[ 117965], | 99.00th=[ 164627], 99.50th=[ 221250], 99.90th=[ 549454], | 99.95th=[1166017], 99.99th=[1166017] bw ( KiB/s): min= 7, max= 150, per=25.55%, avg=49.30, stdev=20.55, samples=247 iops : min= 1, max= 37, avg=11.70, stdev= 5.14, samples=247 lat (usec) : 50=1.01%, 100=3.87%, 250=0.78%, 500=0.26%, 750=0.07% lat (usec) : 1000=0.03% lat (msec) : 2=4.56%, 4=4.75%, 10=7.29%, 20=8.63%, 50=37.66% lat (msec) : 100=24.80%, 250=5.99%, 500=0.23%, 750=0.03%, 2000=0.03% cpu : usr=0.08%, sys=5.30%, ctx=6566, 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=145156: Tue Jun 23 16:05:08 2026 read: IOPS=11, BW=46.6KiB/s (47.8kB/s)(6052KiB/129773msec) clat (usec): min=32, max=951211, avg=42005.15, stdev=40784.54 lat (usec): min=32, max=951212, avg=42007.85, stdev=40783.98 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 60], 10.00th=[ 215], 20.00th=[ 19268], | 30.00th=[ 24249], 40.00th=[ 29754], 50.00th=[ 35390], 60.00th=[ 43254], | 70.00th=[ 52167], 80.00th=[ 62653], 90.00th=[ 76022], 95.00th=[ 90702], | 99.00th=[143655], 99.50th=[206570], 99.90th=[549454], 99.95th=[952108], | 99.99th=[952108] bw ( KiB/s): min= 7, max= 143, per=25.44%, avg=47.07, stdev=21.21, samples=251 iops : min= 1, max= 35, avg=11.15, stdev= 5.33, samples=251 write: IOPS=12, BW=48.1KiB/s (49.2kB/s)(6236KiB/129773msec); 0 zone resets clat (usec): min=1109, max=594867, avg=42206.11, stdev=44352.41 lat (usec): min=1110, max=594868, avg=42209.47, stdev=44352.66 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1385], 10.00th=[ 2147], 20.00th=[ 4948], | 30.00th=[ 10028], 40.00th=[ 21365], 50.00th=[ 32375], 60.00th=[ 43254], | 70.00th=[ 54789], 80.00th=[ 71828], 90.00th=[ 94897], 95.00th=[120062], | 99.00th=[185598], 99.50th=[227541], 99.90th=[392168], 99.95th=[591397], | 99.99th=[591397] bw ( KiB/s): min= 7, max= 150, per=24.82%, avg=47.91, stdev=21.88, samples=254 iops : min= 1, max= 37, avg=11.35, stdev= 5.50, samples=254 lat (usec) : 50=0.68%, 100=3.94%, 250=0.39%, 500=0.07%, 750=0.10% lat (usec) : 1000=0.07% lat (msec) : 2=4.88%, 4=3.87%, 10=6.93%, 20=9.57%, 50=36.33% lat (msec) : 100=27.15%, 250=5.73%, 500=0.20%, 750=0.07%, 1000=0.03% cpu : usr=0.08%, sys=5.37%, ctx=6806, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=185KiB/s (189kB/s), 46.6KiB/s-47.7KiB/s (47.8kB/s-48.8kB/s), io=23.4MiB (24.6MB), run=125988-129773msec WRITE: bw=194KiB/s (198kB/s), 48.1KiB/s-50.4KiB/s (49.2kB/s-51.6kB/s), io=24.6MiB (25.7MB), run=125988-129773msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145149: Tue Jun 23 16:07:45 2026 read: IOPS=5, BW=20.9KiB/s (21.4kB/s)(5992KiB/286333msec) clat (msec): min=5, max=1003, avg=36.88, stdev=44.98 lat (msec): min=5, max=1003, avg=36.88, stdev=44.98 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 35], 80.00th=[ 48], 90.00th=[ 79], 95.00th=[ 107], | 99.00th=[ 184], 99.50th=[ 249], 99.90th=[ 531], 99.95th=[ 1003], | 99.99th=[ 1003] bw ( KiB/s): min= 7, max= 88, per=28.66%, avg=23.78, stdev=16.01, samples=486 iops : min= 1, max= 22, avg= 5.32, stdev= 4.05, samples=486 write: IOPS=5, BW=21.0KiB/s (22.5kB/s)(6296KiB/286333msec); 0 zone resets clat (msec): min=41, max=563, avg=146.56, stdev=64.13 lat (msec): min=41, max=563, avg=146.57, stdev=64.14 clat percentiles (msec): | 1.00th=[ 55], 5.00th=[ 68], 10.00th=[ 80], 20.00th=[ 95], | 30.00th=[ 107], 40.00th=[ 117], 50.00th=[ 131], 60.00th=[ 150], | 70.00th=[ 169], 80.00th=[ 194], 90.00th=[ 232], 95.00th=[ 271], | 99.00th=[ 355], 99.50th=[ 388], 99.90th=[ 464], 99.95th=[ 567], | 99.99th=[ 567] bw ( KiB/s): min= 7, max= 47, per=24.99%, avg=21.74, stdev= 9.31, samples=556 iops : min= 1, max= 11, avg= 4.81, stdev= 2.37, samples=556 lat (msec) : 10=2.28%, 20=16.99%, 50=20.51%, 100=18.72%, 250=37.86% lat (msec) : 500=3.55%, 750=0.07%, 2000=0.03% cpu : usr=0.03%, sys=1.26%, ctx=5274, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145151: Tue Jun 23 16:07:45 2026 read: IOPS=5, BW=20.8KiB/s (21.3kB/s)(5940KiB/284909msec) clat (msec): min=5, max=914, avg=35.78, stdev=41.12 lat (msec): min=5, max=914, avg=35.78, stdev=41.12 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 28], | 70.00th=[ 36], 80.00th=[ 47], 90.00th=[ 78], 95.00th=[ 104], | 99.00th=[ 167], 99.50th=[ 211], 99.90th=[ 355], 99.95th=[ 911], | 99.99th=[ 911] bw ( KiB/s): min= 7, max= 96, per=28.86%, avg=23.96, stdev=15.97, samples=478 iops : min= 1, max= 24, avg= 5.36, stdev= 4.02, samples=478 write: IOPS=5, BW=22.3KiB/s (22.8kB/s)(6348KiB/284909msec); 0 zone resets clat (msec): min=45, max=714, avg=145.77, stdev=65.29 lat (msec): min=45, max=714, avg=145.77, stdev=65.29 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 70], 10.00th=[ 79], 20.00th=[ 93], | 30.00th=[ 106], 40.00th=[ 118], 50.00th=[ 133], 60.00th=[ 148], | 70.00th=[ 167], 80.00th=[ 192], 90.00th=[ 232], 95.00th=[ 266], | 99.00th=[ 359], 99.50th=[ 401], 99.90th=[ 575], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 7, max= 47, per=25.11%, avg=21.85, stdev= 9.41, samples=558 iops : min= 1, max= 11, avg= 4.83, stdev= 2.40, samples=558 lat (msec) : 10=2.12%, 20=17.29%, 50=20.57%, 100=19.01%, 250=37.37% lat (msec) : 500=3.55%, 750=0.07%, 1000=0.03% cpu : usr=0.04%, sys=1.29%, ctx=5183, 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=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=145153: Tue Jun 23 16:07:45 2026 read: IOPS=5, BW=21.4KiB/s (21.9kB/s)(6028KiB/281302msec) clat (msec): min=6, max=343, avg=36.31, stdev=36.89 lat (msec): min=6, max=343, avg=36.31, stdev=36.90 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 35], 80.00th=[ 50], 90.00th=[ 79], 95.00th=[ 101], | 99.00th=[ 194], 99.50th=[ 264], 99.90th=[ 317], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 7, max= 94, per=28.43%, avg=23.60, stdev=15.52, samples=493 iops : min= 1, max= 23, avg= 5.27, stdev= 3.92, samples=493 write: IOPS=5, BW=22.3KiB/s (22.8kB/s)(6260KiB/281302msec); 0 zone resets clat (msec): min=34, max=1171, avg=144.50, stdev=68.34 lat (msec): min=34, max=1171, avg=144.50, stdev=68.34 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 68], 10.00th=[ 78], 20.00th=[ 92], | 30.00th=[ 104], 40.00th=[ 115], 50.00th=[ 130], 60.00th=[ 146], | 70.00th=[ 167], 80.00th=[ 192], 90.00th=[ 232], 95.00th=[ 262], | 99.00th=[ 338], 99.50th=[ 368], 99.90th=[ 726], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 7, max= 48, per=25.26%, avg=21.97, stdev= 9.61, samples=548 iops : min= 1, max= 12, avg= 4.87, stdev= 2.44, samples=548 lat (msec) : 10=2.18%, 20=16.89%, 50=20.74%, 100=20.48%, 250=36.33% lat (msec) : 500=3.32%, 750=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.29%, ctx=5205, 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=145155: Tue Jun 23 16:07:45 2026 read: IOPS=5, BW=21.4KiB/s (21.9kB/s)(6052KiB/283029msec) clat (msec): min=5, max=367, avg=36.28, stdev=36.29 lat (msec): min=5, max=367, avg=36.29, stdev=36.29 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=[ 35], 80.00th=[ 51], 90.00th=[ 79], 95.00th=[ 109], | 99.00th=[ 176], 99.50th=[ 230], 99.90th=[ 321], 99.95th=[ 368], | 99.99th=[ 368] bw ( KiB/s): min= 7, max= 103, per=28.96%, avg=24.03, stdev=16.17, samples=485 iops : min= 1, max= 25, avg= 5.38, stdev= 4.06, samples=485 write: IOPS=5, BW=22.0KiB/s (22.6kB/s)(6236KiB/283029msec); 0 zone resets clat (msec): min=36, max=1058, avg=146.05, stdev=66.14 lat (msec): min=36, max=1058, avg=146.06, stdev=66.14 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 70], 10.00th=[ 81], 20.00th=[ 93], | 30.00th=[ 106], 40.00th=[ 120], 50.00th=[ 132], 60.00th=[ 148], | 70.00th=[ 171], 80.00th=[ 192], 90.00th=[ 232], 95.00th=[ 266], | 99.00th=[ 347], 99.50th=[ 368], 99.90th=[ 460], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 7, max= 48, per=24.85%, avg=21.62, stdev= 9.35, samples=553 iops : min= 1, max= 12, avg= 4.78, stdev= 2.38, samples=553 lat (msec) : 10=2.83%, 20=16.70%, 50=20.02%, 100=20.28%, 250=36.85% lat (msec) : 500=3.29%, 2000=0.03% cpu : usr=0.04%, sys=1.31%, ctx=5264, 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=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=83.9KiB/s (85.9kB/s), 20.8KiB/s-21.4KiB/s (21.3kB/s-21.9kB/s), io=23.4MiB (24.6MB), run=281302-286333msec WRITE: bw=87.8KiB/s (89.9kB/s), 21.0KiB/s-22.3KiB/s (22.5kB/s-22.8kB/s), io=24.6MiB (25.7MB), run=281302-286333msec 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=145213: Tue Jun 23 16:08:30 2026 read: IOPS=11, BW=178KiB/s (182kB/s)(5920KiB/33255msec) clat (usec): min=32, max=272407, avg=45397.51, stdev=43328.95 lat (usec): min=32, max=272408, avg=45399.56, stdev=43329.50 clat percentiles (usec): | 1.00th=[ 38], 5.00th=[ 58], 10.00th=[ 68], 20.00th=[ 110], | 30.00th=[ 22152], 40.00th=[ 32113], 50.00th=[ 38536], 60.00th=[ 46400], | 70.00th=[ 58983], 80.00th=[ 76022], 90.00th=[ 95945], 95.00th=[126354], | 99.00th=[214959], 99.50th=[250610], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 31, max= 477, per=24.97%, avg=178.57, stdev=84.79, samples=65 iops : min= 1, max= 29, avg=10.42, stdev= 5.33, samples=65 write: IOPS=11, BW=191KiB/s (196kB/s)(6368KiB/33255msec); 0 zone resets clat (usec): min=1589, max=245130, avg=40078.66, stdev=40149.01 lat (usec): min=1590, max=245132, avg=40083.50, stdev=40150.90 clat percentiles (usec): | 1.00th=[ 1795], 5.00th=[ 2409], 10.00th=[ 3654], 20.00th=[ 6063], | 30.00th=[ 9372], 40.00th=[ 15008], 50.00th=[ 27132], 60.00th=[ 39584], | 70.00th=[ 53216], 80.00th=[ 71828], 90.00th=[ 98042], 95.00th=[120062], | 99.00th=[154141], 99.50th=[204473], 99.90th=[244319], 99.95th=[244319], | 99.99th=[244319] bw ( KiB/s): min= 21, max= 468, per=25.57%, avg=192.26, stdev=94.43, samples=65 iops : min= 1, max= 29, avg=11.29, stdev= 5.99, samples=65 lat (usec) : 50=1.30%, 100=7.94%, 250=1.82%, 500=0.26%, 750=0.26% lat (usec) : 1000=0.26% lat (msec) : 2=1.82%, 4=4.82%, 10=10.68%, 20=7.68%, 50=28.39% lat (msec) : 100=25.91%, 250=8.72%, 500=0.13% cpu : usr=0.07%, sys=5.70%, ctx=1616, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145214: Tue Jun 23 16:08:30 2026 read: IOPS=11, BW=179KiB/s (183kB/s)(5744KiB/32179msec) clat (usec): min=32, max=239326, avg=44630.11, stdev=40338.39 lat (usec): min=32, max=239327, avg=44640.97, stdev=40343.77 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 57], 10.00th=[ 70], 20.00th=[ 93], | 30.00th=[ 20055], 40.00th=[ 34341], 50.00th=[ 41157], 60.00th=[ 50070], | 70.00th=[ 60556], 80.00th=[ 72877], 90.00th=[ 93848], 95.00th=[111674], | 99.00th=[183501], 99.50th=[223347], 99.90th=[240124], 99.95th=[240124], | 99.99th=[240124] bw ( KiB/s): min= 43, max= 382, per=24.97%, avg=178.50, stdev=86.18, samples=62 iops : min= 2, max= 23, avg=10.42, stdev= 5.52, samples=62 write: IOPS=12, BW=203KiB/s (208kB/s)(6544KiB/32179msec); 0 zone resets clat (usec): min=1628, max=259159, avg=39195.77, stdev=42225.22 lat (usec): min=1628, max=259162, avg=39203.95, stdev=42224.63 clat percentiles (usec): | 1.00th=[ 1975], 5.00th=[ 2638], 10.00th=[ 4228], 20.00th=[ 6849], | 30.00th=[ 10552], 40.00th=[ 17171], 50.00th=[ 24249], 60.00th=[ 34866], | 70.00th=[ 46924], 80.00th=[ 64750], 90.00th=[ 90702], 95.00th=[129500], | 99.00th=[198181], 99.50th=[231736], 99.90th=[258999], 99.95th=[258999], | 99.99th=[258999] bw ( KiB/s): min= 30, max= 414, per=26.98%, avg=202.90, stdev=101.34, samples=62 iops : min= 1, max= 25, avg=11.95, stdev= 6.44, samples=62 lat (usec) : 50=1.82%, 100=8.07%, 250=1.30%, 500=0.52%, 750=0.39% lat (msec) : 2=1.17%, 4=4.17%, 10=10.16%, 20=10.03%, 50=28.91% lat (msec) : 100=25.13%, 250=8.20%, 500=0.13% cpu : usr=0.06%, sys=5.75%, ctx=1534, 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=145215: Tue Jun 23 16:08:30 2026 read: IOPS=11, BW=187KiB/s (192kB/s)(6256KiB/33424msec) clat (usec): min=32, max=272331, avg=43154.65, stdev=37784.02 lat (usec): min=33, max=272333, avg=43156.16, stdev=37784.04 clat percentiles (usec): | 1.00th=[ 43], 5.00th=[ 60], 10.00th=[ 68], 20.00th=[ 95], | 30.00th=[ 20579], 40.00th=[ 31327], 50.00th=[ 39584], 60.00th=[ 47449], | 70.00th=[ 60031], 80.00th=[ 72877], 90.00th=[ 87557], 95.00th=[106431], | 99.00th=[149947], 99.50th=[210764], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 21, max= 509, per=26.36%, avg=188.45, stdev=102.75, samples=65 iops : min= 1, max= 31, avg=11.03, stdev= 6.51, samples=65 write: IOPS=11, BW=180KiB/s (185kB/s)(6032KiB/33424msec); 0 zone resets clat (usec): min=1754, max=505696, avg=42879.72, stdev=50040.26 lat (usec): min=1754, max=505698, avg=42886.49, stdev=50043.19 clat percentiles (usec): | 1.00th=[ 1827], 5.00th=[ 2245], 10.00th=[ 3163], 20.00th=[ 6587], | 30.00th=[ 9765], 40.00th=[ 17695], 50.00th=[ 28181], 60.00th=[ 37487], | 70.00th=[ 52691], 80.00th=[ 73925], 90.00th=[100140], 95.00th=[135267], | 99.00th=[225444], 99.50th=[287310], 99.90th=[505414], 99.95th=[505414], | 99.99th=[505414] bw ( KiB/s): min= 31, max= 539, per=23.67%, avg=177.98, stdev=95.36, samples=65 iops : min= 1, max= 33, avg=10.38, stdev= 6.03, samples=65 lat (usec) : 50=1.43%, 100=9.24%, 250=1.17%, 500=0.39% lat (msec) : 2=1.82%, 4=4.69%, 10=9.64%, 20=7.68%, 50=29.56% lat (msec) : 100=26.56%, 250=7.42%, 500=0.26%, 750=0.13% cpu : usr=0.08%, sys=5.83%, ctx=1549, 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=145217: Tue Jun 23 16:08:30 2026 read: IOPS=11, BW=180KiB/s (184kB/s)(6032KiB/33487msec) clat (usec): min=37, max=362252, avg=46377.55, stdev=45692.55 lat (usec): min=37, max=362253, avg=46422.19, stdev=45666.53 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 60], 10.00th=[ 72], 20.00th=[ 103], | 30.00th=[ 20055], 40.00th=[ 32900], 50.00th=[ 40109], 60.00th=[ 50594], | 70.00th=[ 61604], 80.00th=[ 76022], 90.00th=[ 98042], 95.00th=[117965], | 99.00th=[233833], 99.50th=[278922], 99.90th=[362808], 99.95th=[362808], | 99.99th=[362808] bw ( KiB/s): min= 31, max= 382, per=25.81%, avg=184.51, stdev=85.81, samples=63 iops : min= 1, max= 23, avg=10.78, stdev= 5.45, samples=63 write: IOPS=11, BW=187KiB/s (191kB/s)(6256KiB/33487msec); 0 zone resets clat (usec): min=1725, max=308531, avg=39326.28, stdev=44907.82 lat (usec): min=1726, max=308535, avg=39336.65, stdev=44909.87 clat percentiles (usec): | 1.00th=[ 1860], 5.00th=[ 3097], 10.00th=[ 4293], 20.00th=[ 7701], | 30.00th=[ 10683], 40.00th=[ 15795], 50.00th=[ 24511], 60.00th=[ 35390], | 70.00th=[ 46924], 80.00th=[ 62653], 90.00th=[ 89654], 95.00th=[115868], | 99.00th=[244319], 99.50th=[304088], 99.90th=[308282], 99.95th=[308282], | 99.99th=[308282] bw ( KiB/s): min= 31, max= 473, per=25.47%, avg=191.52, stdev=84.01, samples=63 iops : min= 1, max= 29, avg=11.22, stdev= 5.30, samples=63 lat (usec) : 50=0.91%, 100=8.72%, 250=2.60%, 500=0.91%, 750=0.13% lat (usec) : 1000=0.13% lat (msec) : 2=0.78%, 4=3.65%, 10=10.29%, 20=9.90%, 50=27.86% lat (msec) : 100=25.78%, 250=7.68%, 500=0.65% cpu : usr=0.08%, sys=5.50%, ctx=1554, 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=715KiB/s (732kB/s), 178KiB/s-187KiB/s (182kB/s-192kB/s), io=23.4MiB (24.5MB), run=32179-33487msec WRITE: bw=753KiB/s (771kB/s), 180KiB/s-203KiB/s (185kB/s-208kB/s), io=24.6MiB (25.8MB), run=32179-33487msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145216: Tue Jun 23 16:09:15 2026 read: IOPS=4, BW=76.8KiB/s (78.7kB/s)(5920KiB/77071msec) clat (msec): min=8, max=431, avg=44.18, stdev=51.31 lat (msec): min=8, max=431, avg=44.18, stdev=51.31 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 34], | 70.00th=[ 42], 80.00th=[ 57], 90.00th=[ 89], 95.00th=[ 130], | 99.00th=[ 271], 99.50th=[ 418], 99.90th=[ 430], 99.95th=[ 430], | 99.99th=[ 430] bw ( KiB/s): min= 29, max= 286, per=29.43%, avg=90.07, stdev=54.44, samples=129 iops : min= 1, max= 17, avg= 4.86, stdev= 3.43, samples=129 write: IOPS=5, BW=82.6KiB/s (84.6kB/s)(6368KiB/77071msec); 0 zone resets clat (msec): min=53, max=540, avg=152.29, stdev=70.35 lat (msec): min=53, max=540, avg=152.30, stdev=70.35 clat percentiles (msec): | 1.00th=[ 58], 5.00th=[ 73], 10.00th=[ 88], 20.00th=[ 101], | 30.00th=[ 110], 40.00th=[ 123], 50.00th=[ 132], 60.00th=[ 150], | 70.00th=[ 171], 80.00th=[ 194], 90.00th=[ 247], 95.00th=[ 288], | 99.00th=[ 401], 99.50th=[ 472], 99.90th=[ 542], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 26, max= 160, per=26.24%, avg=84.49, stdev=34.92, samples=148 iops : min= 1, max= 10, avg= 4.49, stdev= 2.29, samples=148 lat (msec) : 10=1.17%, 20=12.89%, 50=22.92%, 100=17.06%, 250=40.62% lat (msec) : 500=5.21%, 750=0.13% cpu : usr=0.05%, sys=1.30%, ctx=1360, 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=145218: Tue Jun 23 16:09:15 2026 read: IOPS=4, BW=73.5KiB/s (75.3kB/s)(5744KiB/78133msec) clat (msec): min=7, max=344, avg=41.81, stdev=41.34 lat (msec): min=7, max=344, avg=41.82, stdev=41.34 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 15], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 25], 50.00th=[ 29], 60.00th=[ 33], | 70.00th=[ 39], 80.00th=[ 50], 90.00th=[ 87], 95.00th=[ 130], | 99.00th=[ 205], 99.50th=[ 255], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 26, max= 254, per=29.78%, avg=91.13, stdev=56.41, samples=123 iops : min= 1, max= 15, avg= 4.95, stdev= 3.56, samples=123 write: IOPS=5, BW=83.8KiB/s (85.8kB/s)(6544KiB/78133msec); 0 zone resets clat (msec): min=42, max=538, avg=152.95, stdev=68.44 lat (msec): min=42, max=538, avg=152.95, stdev=68.44 clat percentiles (msec): | 1.00th=[ 58], 5.00th=[ 74], 10.00th=[ 85], 20.00th=[ 103], | 30.00th=[ 114], 40.00th=[ 128], 50.00th=[ 138], 60.00th=[ 150], | 70.00th=[ 171], 80.00th=[ 190], 90.00th=[ 245], 95.00th=[ 284], | 99.00th=[ 388], 99.50th=[ 430], 99.90th=[ 542], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 26, max= 191, per=26.31%, avg=84.71, stdev=35.49, samples=151 iops : min= 1, max= 11, avg= 4.52, stdev= 2.24, samples=151 lat (msec) : 10=1.04%, 20=10.68%, 50=26.17%, 100=15.10%, 250=42.19% lat (msec) : 500=4.69%, 750=0.13% cpu : usr=0.04%, sys=1.28%, ctx=1310, 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=145219: Tue Jun 23 16:09:15 2026 read: IOPS=5, BW=81.9KiB/s (83.8kB/s)(6256KiB/76403msec) clat (msec): min=8, max=331, avg=40.90, stdev=44.69 lat (msec): min=8, max=331, avg=40.90, stdev=44.69 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 37], 80.00th=[ 54], 90.00th=[ 81], 95.00th=[ 146], | 99.00th=[ 236], 99.50th=[ 326], 99.90th=[ 334], 99.95th=[ 334], | 99.99th=[ 334] bw ( KiB/s): min= 29, max= 350, per=30.80%, avg=94.26, stdev=70.06, samples=131 iops : min= 1, max= 21, avg= 5.11, stdev= 4.39, samples=131 write: IOPS=4, BW=78.9KiB/s (80.8kB/s)(6032KiB/76403msec); 0 zone resets clat (msec): min=47, max=535, avg=159.18, stdev=75.41 lat (msec): min=47, max=535, avg=159.19, stdev=75.42 clat percentiles (msec): | 1.00th=[ 55], 5.00th=[ 79], 10.00th=[ 89], 20.00th=[ 105], | 30.00th=[ 114], 40.00th=[ 128], 50.00th=[ 142], 60.00th=[ 159], | 70.00th=[ 176], 80.00th=[ 201], 90.00th=[ 247], 95.00th=[ 309], | 99.00th=[ 502], 99.50th=[ 518], 99.90th=[ 535], 99.95th=[ 535], | 99.99th=[ 535] bw ( KiB/s): min= 26, max= 128, per=25.06%, avg=80.69, stdev=30.90, samples=147 iops : min= 1, max= 8, avg= 4.26, stdev= 1.99, samples=147 lat (msec) : 10=1.43%, 20=16.02%, 50=22.66%, 100=15.89%, 250=38.80% lat (msec) : 500=4.69%, 750=0.52% cpu : usr=0.04%, sys=1.28%, ctx=1342, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145220: Tue Jun 23 16:09:15 2026 read: IOPS=4, BW=77.5KiB/s (79.3kB/s)(6032KiB/77853msec) clat (msec): min=8, max=276, avg=41.89, stdev=45.19 lat (msec): min=8, max=276, avg=41.90, stdev=45.22 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 36], 80.00th=[ 51], 90.00th=[ 93], 95.00th=[ 140], | 99.00th=[ 239], 99.50th=[ 271], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 31, max= 320, per=30.83%, avg=94.35, stdev=63.28, samples=125 iops : min= 1, max= 20, avg= 5.14, stdev= 4.06, samples=125 write: IOPS=5, BW=80.4KiB/s (82.3kB/s)(6256KiB/77853msec); 0 zone resets clat (msec): min=59, max=834, avg=157.91, stdev=77.62 lat (msec): min=59, max=834, avg=157.91, stdev=77.62 clat percentiles (msec): | 1.00th=[ 64], 5.00th=[ 74], 10.00th=[ 87], 20.00th=[ 102], | 30.00th=[ 116], 40.00th=[ 130], 50.00th=[ 140], 60.00th=[ 155], | 70.00th=[ 171], 80.00th=[ 201], 90.00th=[ 236], 95.00th=[ 321], | 99.00th=[ 409], 99.50th=[ 418], 99.90th=[ 835], 99.95th=[ 835], | 99.99th=[ 835] bw ( KiB/s): min= 26, max= 159, per=25.56%, avg=82.31, stdev=34.33, samples=150 iops : min= 1, max= 9, avg= 4.36, stdev= 2.19, samples=150 lat (msec) : 10=0.91%, 20=14.71%, 50=23.57%, 100=14.71%, 250=41.15% lat (msec) : 500=4.82%, 1000=0.13% cpu : usr=0.04%, sys=1.35%, ctx=1322, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=307KiB/s (314kB/s), 73.5KiB/s-81.9KiB/s (75.3kB/s-83.8kB/s), io=23.4MiB (24.5MB), run=76403-78133msec WRITE: bw=323KiB/s (330kB/s), 78.9KiB/s-83.8KiB/s (80.8kB/s-85.8kB/s), io=24.6MiB (25.8MB), run=76403-78133msec 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=145239: Tue Jun 23 16:09:30 2026 read: IOPS=2, BW=2354KiB/s (2411kB/s)(7168KiB/3045msec) clat (msec): min=71, max=273, avg=122.32, stdev=73.69 lat (msec): min=71, max=273, avg=122.32, stdev=73.69 clat percentiles (msec): | 1.00th=[ 72], 5.00th=[ 72], 10.00th=[ 72], 20.00th=[ 81], | 30.00th=[ 81], 40.00th=[ 81], 50.00th=[ 91], 60.00th=[ 94], | 70.00th=[ 94], 80.00th=[ 165], 90.00th=[ 275], 95.00th=[ 275], | 99.00th=[ 275], 99.50th=[ 275], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 2043, max= 4243, per=95.37%, avg=3452.33, stdev=1223.54, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 write: IOPS=1, BW=1681KiB/s (1722kB/s)(5120KiB/3045msec); 0 zone resets clat (msec): min=247, max=662, avg=421.00, stdev=157.96 lat (msec): min=247, max=663, avg=421.19, stdev=158.08 clat percentiles (msec): | 1.00th=[ 249], 5.00th=[ 249], 10.00th=[ 249], 20.00th=[ 249], | 30.00th=[ 326], 40.00th=[ 326], 50.00th=[ 401], 60.00th=[ 401], | 70.00th=[ 468], 80.00th=[ 468], 90.00th=[ 659], 95.00th=[ 659], | 99.00th=[ 659], 99.50th=[ 659], 99.90th=[ 659], 99.95th=[ 659], | 99.99th=[ 659] bw ( KiB/s): min= 1414, max= 2043, per=36.84%, avg=1867.00, stdev=302.55, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 100=41.67%, 250=16.67%, 500=33.33%, 750=8.33% cpu : usr=0.00%, sys=4.27%, ctx=50, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145240: Tue Jun 23 16:09:30 2026 read: IOPS=0, BW=362KiB/s (371kB/s)(2048KiB/5657msec) clat (msec): min=88, max=236, avg=162.34, stdev=104.70 lat (msec): min=88, max=236, avg=162.34, stdev=104.70 clat percentiles (msec): | 1.00th=[ 89], 5.00th=[ 89], 10.00th=[ 89], 20.00th=[ 89], | 30.00th=[ 89], 40.00th=[ 89], 50.00th=[ 89], 60.00th=[ 236], | 70.00th=[ 236], 80.00th=[ 236], 90.00th=[ 236], 95.00th=[ 236], | 99.00th=[ 236], 99.50th=[ 236], 99.90th=[ 236], 99.95th=[ 236], | 99.99th=[ 236] bw ( KiB/s): min= 1367, max= 2043, per=47.10%, avg=1705.00, stdev=478.00, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1810KiB/s (1854kB/s)(10.0MiB/5657msec); 0 zone resets clat (msec): min=179, max=2042, avg=529.80, stdev=571.46 lat (msec): min=179, max=2042, avg=529.90, stdev=571.45 clat percentiles (msec): | 1.00th=[ 180], 5.00th=[ 180], 10.00th=[ 180], 20.00th=[ 201], | 30.00th=[ 255], 40.00th=[ 259], 50.00th=[ 259], 60.00th=[ 271], | 70.00th=[ 359], 80.00th=[ 651], 90.00th=[ 818], 95.00th=[ 2039], | 99.00th=[ 2039], 99.50th=[ 2039], 99.90th=[ 2039], 99.95th=[ 2039], | 99.99th=[ 2039] bw ( KiB/s): min= 2023, max= 4087, per=58.84%, avg=2982.00, stdev=1020.74, samples=5 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=5 lat (msec) : 100=8.33%, 250=25.00%, 500=41.67%, 750=8.33%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=3.59%, ctx=88, 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=145241: Tue Jun 23 16:09:30 2026 read: IOPS=1, BW=1087KiB/s (1113kB/s)(6144KiB/5654msec) clat (msec): min=77, max=590, avg=271.77, stdev=189.96 lat (msec): min=77, max=590, avg=271.77, stdev=189.96 clat percentiles (msec): | 1.00th=[ 79], 5.00th=[ 79], 10.00th=[ 79], 20.00th=[ 107], | 30.00th=[ 107], 40.00th=[ 197], 50.00th=[ 197], 60.00th=[ 300], | 70.00th=[ 363], 80.00th=[ 363], 90.00th=[ 592], 95.00th=[ 592], | 99.00th=[ 592], 99.50th=[ 592], 99.90th=[ 592], 99.95th=[ 592], | 99.99th=[ 592] bw ( KiB/s): min= 2011, max= 4087, per=70.31%, avg=2545.25, stdev=1027.95, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=1, BW=1087KiB/s (1113kB/s)(6144KiB/5654msec); 0 zone resets clat (msec): min=178, max=2475, avg=656.70, stdev=896.20 lat (msec): min=178, max=2475, avg=656.78, stdev=896.20 clat percentiles (msec): | 1.00th=[ 180], 5.00th=[ 180], 10.00th=[ 180], 20.00th=[ 207], | 30.00th=[ 207], 40.00th=[ 279], 50.00th=[ 279], 60.00th=[ 376], | 70.00th=[ 422], 80.00th=[ 422], 90.00th=[ 2467], 95.00th=[ 2467], | 99.00th=[ 2467], 99.50th=[ 2467], 99.90th=[ 2467], 99.95th=[ 2467], | 99.99th=[ 2467] bw ( KiB/s): min= 2000, max= 2748, per=43.56%, avg=2207.75, stdev=360.74, samples=4 iops : min= 1, max= 2, avg= 1.50, stdev= 0.58, samples=4 lat (msec) : 100=8.33%, 250=33.33%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.02%, sys=2.51%, ctx=83, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145242: Tue Jun 23 16:09:30 2026 read: IOPS=1, BW=1026KiB/s (1050kB/s)(5120KiB/4991msec) clat (msec): min=116, max=398, avg=232.24, stdev=102.78 lat (msec): min=116, max=398, avg=232.24, stdev=102.78 clat percentiles (msec): | 1.00th=[ 117], 5.00th=[ 117], 10.00th=[ 117], 20.00th=[ 117], | 30.00th=[ 203], 40.00th=[ 203], 50.00th=[ 218], 60.00th=[ 218], | 70.00th=[ 226], 80.00th=[ 226], 90.00th=[ 401], 95.00th=[ 401], | 99.00th=[ 401], 99.50th=[ 401], 99.90th=[ 401], 99.95th=[ 401], | 99.99th=[ 401] bw ( KiB/s): min= 2000, max= 4023, per=74.27%, avg=2688.67, stdev=1155.77, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1436KiB/s (1471kB/s)(7168KiB/4991msec); 0 zone resets clat (msec): min=182, max=1991, avg=541.51, stdev=648.99 lat (msec): min=182, max=1991, avg=541.60, stdev=648.99 clat percentiles (msec): | 1.00th=[ 184], 5.00th=[ 184], 10.00th=[ 184], 20.00th=[ 194], | 30.00th=[ 264], 40.00th=[ 264], 50.00th=[ 313], 60.00th=[ 334], | 70.00th=[ 334], 80.00th=[ 514], 90.00th=[ 1989], 95.00th=[ 1989], | 99.00th=[ 1989], 99.50th=[ 1989], 99.90th=[ 1989], 99.95th=[ 1989], | 99.99th=[ 1989] bw ( KiB/s): min= 2011, max= 4079, per=54.68%, avg=2771.00, stdev=977.33, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 lat (msec) : 250=50.00%, 500=33.33%, 750=8.33%, 2000=8.33% cpu : usr=0.02%, sys=2.91%, ctx=70, 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=3620KiB/s (3707kB/s), 362KiB/s-2354KiB/s (371kB/s-2411kB/s), io=20.0MiB (20.0MB), run=3045-5657msec WRITE: bw=5068KiB/s (5190kB/s), 1087KiB/s-1810KiB/s (1113kB/s-1854kB/s), io=28.0MiB (29.4MB), run=3045-5657msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145244: Tue Jun 23 16:09:30 2026 read: IOPS=1, BW=1538KiB/s (1575kB/s)(7168KiB/4660msec) clat (usec): min=403, max=3121.0k, avg=548699.63, stdev=1142248.33 lat (usec): min=403, max=3121.0k, avg=548700.69, stdev=1142248.31 clat percentiles (usec): | 1.00th=[ 404], 5.00th=[ 404], 10.00th=[ 404], | 20.00th=[ 457], 30.00th=[ 529], 40.00th=[ 529], | 50.00th=[ 162530], 60.00th=[ 212861], 70.00th=[ 212861], | 80.00th=[ 341836], 90.00th=[3137340], 95.00th=[3137340], | 99.00th=[3137340], 99.50th=[3137340], 99.90th=[3137340], | 99.95th=[3137340], 99.99th=[3137340] bw ( KiB/s): min= 1988, max= 4039, per=76.03%, avg=2981.00, stdev=1114.95, samples=4 iops : min= 1, max= 3, avg= 2.25, stdev= 0.96, samples=4 write: IOPS=1, BW=1099KiB/s (1125kB/s)(5120KiB/4660msec); 0 zone resets clat (msec): min=110, max=226, avg=163.54, stdev=48.91 lat (msec): min=110, max=227, avg=163.61, stdev=48.92 clat percentiles (msec): | 1.00th=[ 110], 5.00th=[ 110], 10.00th=[ 110], 20.00th=[ 110], | 30.00th=[ 126], 40.00th=[ 126], 50.00th=[ 159], 60.00th=[ 159], | 70.00th=[ 199], 80.00th=[ 199], 90.00th=[ 228], 95.00th=[ 228], | 99.00th=[ 228], 99.50th=[ 228], 99.90th=[ 228], 99.95th=[ 228], | 99.99th=[ 228] bw ( KiB/s): min= 2048, max= 6059, per=73.85%, avg=4053.50, stdev=2836.21, samples=2 iops : min= 2, max= 5, avg= 3.50, stdev= 2.12, samples=2 lat (usec) : 500=16.67%, 750=8.33% lat (msec) : 250=58.33%, 500=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=7.81%, ctx=333, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145245: Tue Jun 23 16:09:30 2026 read: IOPS=0, BW=392KiB/s (402kB/s)(2048KiB/5223msec) clat (usec): min=545, max=341729, avg=171137.21, stdev=241253.32 lat (usec): min=546, max=341731, avg=171138.88, stdev=241254.13 clat percentiles (usec): | 1.00th=[ 545], 5.00th=[ 545], 10.00th=[ 545], 20.00th=[ 545], | 30.00th=[ 545], 40.00th=[ 545], 50.00th=[ 545], 60.00th=[341836], | 70.00th=[341836], 80.00th=[341836], 90.00th=[341836], 95.00th=[341836], | 99.00th=[341836], 99.50th=[341836], 99.90th=[341836], 99.95th=[341836], | 99.99th=[341836] bw ( KiB/s): min= 1946, max= 2011, per=50.46%, avg=1978.50, stdev=45.96, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1961KiB/s (2008kB/s)(10.0MiB/5223msec); 0 zone resets clat (msec): min=144, max=1992, avg=487.21, stdev=566.05 lat (msec): min=144, max=1992, avg=487.39, stdev=565.99 clat percentiles (msec): | 1.00th=[ 146], 5.00th=[ 146], 10.00th=[ 146], 20.00th=[ 188], | 30.00th=[ 199], 40.00th=[ 201], 50.00th=[ 203], 60.00th=[ 211], | 70.00th=[ 426], 80.00th=[ 535], 90.00th=[ 776], 95.00th=[ 1989], | 99.00th=[ 1989], 99.50th=[ 1989], 99.90th=[ 1989], 99.95th=[ 1989], | 99.99th=[ 1989] bw ( KiB/s): min= 2031, max= 6144, per=65.34%, avg=3586.60, stdev=1699.83, samples=5 iops : min= 1, max= 6, avg= 2.80, stdev= 2.05, samples=5 lat (usec) : 750=8.33% lat (msec) : 250=50.00%, 500=16.67%, 750=8.33%, 1000=8.33%, 2000=8.33% cpu : usr=0.00%, sys=10.93%, ctx=142, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145246: Tue Jun 23 16:09:30 2026 read: IOPS=1, BW=1301KiB/s (1332kB/s)(6144KiB/4723msec) clat (usec): min=499, max=357289, avg=130900.49, stdev=152501.45 lat (usec): min=500, max=357291, avg=130901.83, stdev=152501.68 clat percentiles (usec): | 1.00th=[ 498], 5.00th=[ 498], 10.00th=[ 498], 20.00th=[ 515], | 30.00th=[ 515], 40.00th=[ 996], 50.00th=[ 996], 60.00th=[193987], | 70.00th=[231736], 80.00th=[231736], 90.00th=[358613], 95.00th=[358613], | 99.00th=[358613], 99.50th=[358613], 99.90th=[358613], 99.95th=[358613], | 99.99th=[358613] bw ( KiB/s): min= 2011, max= 5941, per=85.01%, avg=3333.33, stdev=2258.38, samples=3 iops : min= 1, max= 5, avg= 2.67, stdev= 2.08, samples=3 write: IOPS=1, BW=1301KiB/s (1332kB/s)(6144KiB/4723msec); 0 zone resets clat (msec): min=119, max=2360, avg=655.61, stdev=861.59 lat (msec): min=119, max=2360, avg=655.69, stdev=861.60 clat percentiles (msec): | 1.00th=[ 121], 5.00th=[ 121], 10.00th=[ 121], 20.00th=[ 140], | 30.00th=[ 140], 40.00th=[ 186], 50.00th=[ 186], 60.00th=[ 481], | 70.00th=[ 642], 80.00th=[ 642], 90.00th=[ 2366], 95.00th=[ 2366], | 99.00th=[ 2366], 99.50th=[ 2366], 99.90th=[ 2366], 99.95th=[ 2366], | 99.99th=[ 2366] bw ( KiB/s): min= 1848, max= 2048, per=36.03%, avg=1977.60, stdev=79.92, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (usec) : 500=8.33%, 750=8.33%, 1000=8.33% lat (msec) : 250=41.67%, 500=16.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.87%, ctx=95, 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=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=145247: Tue Jun 23 16:09:30 2026 read: IOPS=1, BW=1121KiB/s (1148kB/s)(5120KiB/4566msec) clat (usec): min=474, max=261649, avg=52840.22, stdev=116727.99 lat (usec): min=475, max=261650, avg=52841.23, stdev=116728.02 clat percentiles (usec): | 1.00th=[ 474], 5.00th=[ 474], 10.00th=[ 474], 20.00th=[ 474], | 30.00th=[ 494], 40.00th=[ 494], 50.00th=[ 586], 60.00th=[ 586], | 70.00th=[ 996], 80.00th=[ 996], 90.00th=[261096], 95.00th=[261096], | 99.00th=[261096], 99.50th=[261096], 99.90th=[261096], 99.95th=[261096], | 99.99th=[261096] bw ( KiB/s): min= 7922, max= 7922, per=100.00%, avg=7922.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=1, BW=1570KiB/s (1608kB/s)(7168KiB/4566msec); 0 zone resets clat (msec): min=219, max=2136, avg=613.52, stdev=678.57 lat (msec): min=219, max=2136, avg=613.59, stdev=678.55 clat percentiles (msec): | 1.00th=[ 220], 5.00th=[ 220], 10.00th=[ 220], 20.00th=[ 292], | 30.00th=[ 338], 40.00th=[ 338], 50.00th=[ 342], 60.00th=[ 460], | 70.00th=[ 460], 80.00th=[ 510], 90.00th=[ 2140], 95.00th=[ 2140], | 99.00th=[ 2140], 99.50th=[ 2140], 99.90th=[ 2140], 99.95th=[ 2140], | 99.99th=[ 2140] bw ( KiB/s): min= 1848, max= 2039, per=36.06%, avg=1979.40, stdev=76.46, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (usec) : 500=16.67%, 750=8.33%, 1000=8.33% lat (msec) : 250=8.33%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.39%, ctx=106, 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=3921KiB/s (4015kB/s), 392KiB/s-1538KiB/s (402kB/s-1575kB/s), io=20.0MiB (20.0MB), run=4566-5223msec WRITE: bw=5490KiB/s (5621kB/s), 1099KiB/s-1961KiB/s (1125kB/s-2008kB/s), io=28.0MiB (29.4MB), run=4566-5223msec 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=145259: Tue Jun 23 16:09:45 2026 read: IOPS=0, BW=4063KiB/s (4161kB/s)(12.0MiB/3024msec) clat (msec): min=767, max=1048, avg=925.34, stdev=143.59 lat (msec): min=767, max=1048, avg=925.34, stdev=143.59 clat percentiles (msec): | 1.00th=[ 768], 5.00th=[ 768], 10.00th=[ 768], 20.00th=[ 768], | 30.00th=[ 768], 40.00th=[ 961], 50.00th=[ 961], 60.00th=[ 961], | 70.00th=[ 1053], 80.00th=[ 1053], 90.00th=[ 1053], 95.00th=[ 1053], | 99.00th=[ 1053], 99.50th=[ 1053], 99.90th=[ 1053], 99.95th=[ 1053], | 99.99th=[ 1053] bw ( KiB/s): min= 7846, max= 8094, per=100.00%, avg=7970.00, stdev=175.36, 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=11.58%, ctx=341, 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=145260: Tue Jun 23 16:09:45 2026 read: IOPS=0, BW=1140KiB/s (1167kB/s)(4096KiB/3594msec) clat (nsec): min=840754k, max=840754k, avg=840754407.00, stdev= 0.00 lat (nsec): min=840758k, max=840758k, avg=840757612.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 844], 5.00th=[ 844], 10.00th=[ 844], 20.00th=[ 844], | 30.00th=[ 844], 40.00th=[ 844], 50.00th=[ 844], 60.00th=[ 844], | 70.00th=[ 844], 80.00th=[ 844], 90.00th=[ 844], 95.00th=[ 844], | 99.00th=[ 844], 99.50th=[ 844], 99.90th=[ 844], 99.95th=[ 844], | 99.99th=[ 844] bw ( KiB/s): min= 7846, max= 7846, per=100.00%, avg=7846.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2279KiB/s (2334kB/s)(8192KiB/3594msec); 0 zone resets clat (msec): min=938, max=1655, avg=1297.04, stdev=506.45 lat (msec): min=941, max=1655, avg=1298.69, stdev=504.83 clat percentiles (msec): | 1.00th=[ 936], 5.00th=[ 936], 10.00th=[ 936], 20.00th=[ 936], | 30.00th=[ 936], 40.00th=[ 936], 50.00th=[ 936], 60.00th=[ 1653], | 70.00th=[ 1653], 80.00th=[ 1653], 90.00th=[ 1653], 95.00th=[ 1653], | 99.00th=[ 1653], 99.50th=[ 1653], 99.90th=[ 1653], 99.95th=[ 1653], | 99.99th=[ 1653] bw ( KiB/s): min= 8094, max= 8094, per=90.76%, avg=8094.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 1000=66.67%, 2000=33.33% cpu : usr=0.00%, sys=5.01%, ctx=142, 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=145261: Tue Jun 23 16:09:45 2026 write: IOPS=0, BW=3345KiB/s (3425kB/s)(12.0MiB/3674msec); 0 zone resets clat (msec): min=319, max=1889, avg=1190.30, stdev=798.79 lat (msec): min=319, max=1889, avg=1190.65, stdev=798.84 clat percentiles (msec): | 1.00th=[ 321], 5.00th=[ 321], 10.00th=[ 321], 20.00th=[ 321], | 30.00th=[ 321], 40.00th=[ 1368], 50.00th=[ 1368], 60.00th=[ 1368], | 70.00th=[ 1888], 80.00th=[ 1888], 90.00th=[ 1888], 95.00th=[ 1888], | 99.00th=[ 1888], 99.50th=[ 1888], 99.90th=[ 1888], 99.95th=[ 1888], | 99.99th=[ 1888] bw ( KiB/s): min= 8047, max= 8143, per=90.77%, avg=8095.00, stdev=67.88, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.51%, ctx=54, 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=145262: Tue Jun 23 16:09:45 2026 write: IOPS=1, BW=4451KiB/s (4557kB/s)(12.0MiB/2761msec); 0 zone resets clat (msec): min=400, max=1210, avg=864.64, stdev=417.51 lat (msec): min=401, max=1212, avg=865.92, stdev=418.32 clat percentiles (msec): | 1.00th=[ 401], 5.00th=[ 401], 10.00th=[ 401], 20.00th=[ 401], | 30.00th=[ 401], 40.00th=[ 986], 50.00th=[ 986], 60.00th=[ 986], | 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= 7846, max= 7846, per=87.98%, avg=7846.00, 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=0.11%, sys=6.27%, ctx=60, 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=4559KiB/s (4668kB/s), 1140KiB/s-4063KiB/s (1167kB/s-4161kB/s), io=16.0MiB (16.8MB), run=3024-3594msec WRITE: bw=8919KiB/s (9133kB/s), 2279KiB/s-4451KiB/s (2334kB/s-4557kB/s), io=32.0MiB (33.6MB), run=2761-3674msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145254: Tue Jun 23 16:09:45 2026 read: IOPS=0, BW=3474KiB/s (3558kB/s)(12.0MiB/3537msec) clat (msec): min=329, max=1552, avg=1112.14, stdev=679.76 lat (msec): min=329, max=1552, avg=1112.14, stdev=679.76 clat percentiles (msec): | 1.00th=[ 330], 5.00th=[ 330], 10.00th=[ 330], 20.00th=[ 330], | 30.00th=[ 330], 40.00th=[ 1452], 50.00th=[ 1452], 60.00th=[ 1452], | 70.00th=[ 1552], 80.00th=[ 1552], 90.00th=[ 1552], 95.00th=[ 1552], | 99.00th=[ 1552], 99.50th=[ 1552], 99.90th=[ 1552], 99.95th=[ 1552], | 99.99th=[ 1552] bw ( KiB/s): min= 7984, max= 8126, per=100.00%, avg=8055.00, stdev=100.41, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.88%, ctx=53, 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=145255: Tue Jun 23 16:09:45 2026 read: IOPS=0, BW=937KiB/s (960kB/s)(4096KiB/4370msec) clat (nsec): min=1358.1M, max=1358.1M, avg=1358147969.00, stdev= 0.00 lat (nsec): min=1358.1M, max=1358.1M, avg=1358150321.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1351], 5.00th=[ 1351], 10.00th=[ 1351], 20.00th=[ 1351], | 30.00th=[ 1351], 40.00th=[ 1351], 50.00th=[ 1351], 60.00th=[ 1351], | 70.00th=[ 1351], 80.00th=[ 1351], 90.00th=[ 1351], 95.00th=[ 1351], | 99.00th=[ 1351], 99.50th=[ 1351], 99.90th=[ 1351], 99.95th=[ 1351], | 99.99th=[ 1351] bw ( KiB/s): min= 8062, max= 8062, per=100.00%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1875KiB/s (1920kB/s)(8192KiB/4370msec); 0 zone resets clat (msec): min=1121, max=1690, avg=1406.25, stdev=402.07 lat (msec): min=1124, max=1690, avg=1407.64, stdev=400.56 clat percentiles (msec): | 1.00th=[ 1116], 5.00th=[ 1116], 10.00th=[ 1116], 20.00th=[ 1116], | 30.00th=[ 1116], 40.00th=[ 1116], 50.00th=[ 1116], 60.00th=[ 1687], | 70.00th=[ 1687], 80.00th=[ 1687], 90.00th=[ 1687], 95.00th=[ 1687], | 99.00th=[ 1687], 99.50th=[ 1687], 99.90th=[ 1687], 99.95th=[ 1687], | 99.99th=[ 1687] bw ( KiB/s): min= 8126, max= 8126, per=100.00%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 2000=100.00% cpu : usr=0.00%, sys=3.20%, ctx=45, 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=145256: Tue Jun 23 16:09:45 2026 write: IOPS=1, BW=6341KiB/s (6493kB/s)(12.0MiB/1938msec); 0 zone resets clat (msec): min=289, max=962, avg=577.68, stdev=347.20 lat (msec): min=295, max=963, avg=580.13, stdev=344.56 clat percentiles (msec): | 1.00th=[ 288], 5.00th=[ 288], 10.00th=[ 288], 20.00th=[ 288], | 30.00th=[ 288], 40.00th=[ 481], 50.00th=[ 481], 60.00th=[ 481], | 70.00th=[ 961], 80.00th=[ 961], 90.00th=[ 961], 95.00th=[ 961], | 99.00th=[ 961], 99.50th=[ 961], 99.90th=[ 961], 99.95th=[ 961], | 99.99th=[ 961] bw ( KiB/s): min= 5665, max= 8078, per=91.64%, avg=6871.50, stdev=1706.25, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=66.67%, 1000=33.33% cpu : usr=0.00%, sys=7.28%, ctx=85, 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=145258: Tue Jun 23 16:09:45 2026 write: IOPS=1, BW=4379KiB/s (4484kB/s)(12.0MiB/2806msec); 0 zone resets clat (msec): min=503, max=1123, avg=846.06, stdev=314.62 lat (msec): min=505, max=1123, avg=847.23, stdev=314.34 clat percentiles (msec): | 1.00th=[ 506], 5.00th=[ 506], 10.00th=[ 506], 20.00th=[ 506], | 30.00th=[ 506], 40.00th=[ 911], 50.00th=[ 911], 60.00th=[ 911], | 70.00th=[ 1116], 80.00th=[ 1116], 90.00th=[ 1116], 95.00th=[ 1116], | 99.00th=[ 1116], 99.50th=[ 1116], 99.90th=[ 1116], 99.95th=[ 1116], | 99.99th=[ 1116] bw ( KiB/s): min= 8062, max= 8078, per=100.00%, avg=8070.00, stdev=11.31, 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=0.00%, sys=4.60%, ctx=67, 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=3749KiB/s (3839kB/s), 937KiB/s-3474KiB/s (960kB/s-3558kB/s), io=16.0MiB (16.8MB), run=3537-4370msec WRITE: bw=7498KiB/s (7678kB/s), 1875KiB/s-6341KiB/s (1920kB/s-6493kB/s), io=32.0MiB (33.6MB), run=1938-4370msec