== sanity test 398b: DIO and buffer IO race ============== 14:53:29 (1790880809) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 3.21643 s, 15.6 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=158631: Thu Oct 1 14:54:30 2026 read: IOPS=28, BW=116KiB/s (119kB/s)(5992KiB/51675msec) clat (usec): min=30, max=144016, avg=17244.04, stdev=11896.41 lat (usec): min=31, max=144017, avg=17244.60, stdev=11896.50 clat percentiles (usec): | 1.00th=[ 86], 5.00th=[ 198], 10.00th=[ 7111], 20.00th=[ 8979], | 30.00th=[ 10421], 40.00th=[ 12256], 50.00th=[ 14746], 60.00th=[ 17433], | 70.00th=[ 20317], 80.00th=[ 24773], 90.00th=[ 32113], 95.00th=[ 38011], | 99.00th=[ 53740], 99.50th=[ 64226], 99.90th=[103285], 99.95th=[143655], | 99.99th=[143655] bw ( KiB/s): min= 20, max= 199, per=25.08%, avg=115.62, stdev=34.55, samples=102 iops : min= 5, max= 49, avg=28.54, stdev= 8.70, samples=102 write: IOPS=30, BW=122KiB/s (125kB/s)(6296KiB/51675msec); 0 zone resets clat (usec): min=637, max=656276, avg=16300.21, stdev=21587.30 lat (usec): min=638, max=656277, avg=16300.86, stdev=21587.32 clat percentiles (usec): | 1.00th=[ 750], 5.00th=[ 1778], 10.00th=[ 2606], 20.00th=[ 3556], | 30.00th=[ 5735], 40.00th=[ 9241], 50.00th=[ 12256], 60.00th=[ 16057], | 70.00th=[ 20317], 80.00th=[ 25822], 90.00th=[ 34866], 95.00th=[ 41681], | 99.00th=[ 61080], 99.50th=[ 88605], 99.90th=[147850], 99.95th=[658506], | 99.99th=[658506] bw ( KiB/s): min= 39, max= 215, per=25.36%, avg=122.50, stdev=39.94, samples=101 iops : min= 9, max= 53, avg=30.26, stdev=10.10, samples=101 lat (usec) : 50=0.16%, 100=0.65%, 250=1.89%, 500=0.13%, 750=0.55% lat (usec) : 1000=0.65% lat (msec) : 2=1.66%, 4=8.95%, 10=20.31%, 20=34.18%, 50=29.07% lat (msec) : 100=1.53%, 250=0.23%, 750=0.03% cpu : usr=0.09%, sys=26.39%, ctx=8369, majf=0, minf=19 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=158632: Thu Oct 1 14:54:30 2026 read: IOPS=28, BW=115KiB/s (117kB/s)(5940KiB/51869msec) clat (usec): min=30, max=198842, avg=17265.55, stdev=12431.62 lat (usec): min=30, max=198843, avg=17266.05, stdev=12431.63 clat percentiles (usec): | 1.00th=[ 91], 5.00th=[ 188], 10.00th=[ 7177], 20.00th=[ 8979], | 30.00th=[ 10552], 40.00th=[ 12387], 50.00th=[ 14615], 60.00th=[ 17433], | 70.00th=[ 20579], 80.00th=[ 24511], 90.00th=[ 30802], 95.00th=[ 37487], | 99.00th=[ 55837], 99.50th=[ 70779], 99.90th=[120062], 99.95th=[198181], | 99.99th=[198181] bw ( KiB/s): min= 6, max= 191, per=24.80%, avg=114.35, stdev=33.51, samples=103 iops : min= 1, max= 47, avg=28.21, stdev= 8.44, samples=103 write: IOPS=30, BW=122KiB/s (125kB/s)(6348KiB/51869msec); 0 zone resets clat (usec): min=663, max=665605, avg=16410.04, stdev=21749.27 lat (usec): min=663, max=665606, avg=16410.80, stdev=21749.27 clat percentiles (usec): | 1.00th=[ 799], 5.00th=[ 1876], 10.00th=[ 2638], 20.00th=[ 3654], | 30.00th=[ 5997], 40.00th=[ 9241], 50.00th=[ 12780], 60.00th=[ 16057], | 70.00th=[ 19792], 80.00th=[ 25297], 90.00th=[ 33817], 95.00th=[ 42730], | 99.00th=[ 68682], 99.50th=[ 81265], 99.90th=[122160], 99.95th=[666895], | 99.99th=[666895] bw ( KiB/s): min= 6, max= 223, per=25.23%, avg=121.88, stdev=40.12, samples=103 iops : min= 1, max= 55, avg=30.10, stdev=10.08, samples=103 lat (usec) : 50=0.26%, 100=0.52%, 250=1.89%, 500=0.20%, 750=0.26% lat (usec) : 1000=0.75% lat (msec) : 2=1.79%, 4=8.50%, 10=20.31%, 20=34.83%, 50=28.45% lat (msec) : 100=1.99%, 250=0.23%, 750=0.03% cpu : usr=0.08%, sys=26.38%, ctx=8406, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=158633: Thu Oct 1 14:54:30 2026 read: IOPS=29, BW=116KiB/s (119kB/s)(6028KiB/51885msec) clat (usec): min=32, max=678199, avg=17078.36, stdev=20391.51 lat (usec): min=32, max=678199, avg=17079.32, stdev=20391.67 clat percentiles (usec): | 1.00th=[ 85], 5.00th=[ 151], 10.00th=[ 6915], 20.00th=[ 8717], | 30.00th=[ 10028], 40.00th=[ 11731], 50.00th=[ 13829], 60.00th=[ 16712], | 70.00th=[ 19792], 80.00th=[ 23987], 90.00th=[ 30540], 95.00th=[ 37487], | 99.00th=[ 56886], 99.50th=[ 65274], 99.90th=[111674], 99.95th=[675283], | 99.99th=[675283] bw ( KiB/s): min= 32, max= 215, per=25.39%, avg=117.07, stdev=38.86, samples=102 iops : min= 8, max= 53, avg=28.89, stdev= 9.82, samples=102 write: IOPS=30, BW=121KiB/s (124kB/s)(6260KiB/51885msec); 0 zone resets clat (usec): min=627, max=169218, avg=16582.38, stdev=15304.30 lat (usec): min=628, max=169219, avg=16583.12, stdev=15304.34 clat percentiles (usec): | 1.00th=[ 783], 5.00th=[ 1811], 10.00th=[ 2540], 20.00th=[ 3523], | 30.00th=[ 5604], 40.00th=[ 9372], 50.00th=[ 13173], 60.00th=[ 16909], | 70.00th=[ 20841], 80.00th=[ 26608], 90.00th=[ 35914], 95.00th=[ 44303], | 99.00th=[ 66847], 99.50th=[ 84411], 99.90th=[128451], 99.95th=[168821], | 99.99th=[168821] bw ( KiB/s): min= 20, max= 216, per=24.88%, avg=120.17, stdev=38.10, samples=103 iops : min= 5, max= 54, avg=29.67, stdev= 9.59, samples=103 lat (usec) : 50=0.26%, 100=0.52%, 250=2.05%, 500=0.10%, 750=0.29% lat (usec) : 1000=0.78% lat (msec) : 2=1.99%, 4=9.02%, 10=20.77%, 20=33.43%, 50=28.55% lat (msec) : 100=2.05%, 250=0.16%, 750=0.03% cpu : usr=0.10%, sys=26.30%, ctx=8393, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=158634: Thu Oct 1 14:54:30 2026 read: IOPS=29, BW=116KiB/s (119kB/s)(6052KiB/52001msec) clat (usec): min=24, max=109246, avg=17065.73, stdev=11568.21 lat (usec): min=24, max=109247, avg=17066.58, stdev=11568.19 clat percentiles (usec): | 1.00th=[ 89], 5.00th=[ 293], 10.00th=[ 7111], 20.00th=[ 8848], | 30.00th=[ 10552], 40.00th=[ 12256], 50.00th=[ 14353], 60.00th=[ 17171], | 70.00th=[ 19792], 80.00th=[ 24249], 90.00th=[ 31065], 95.00th=[ 37487], | 99.00th=[ 57934], 99.50th=[ 69731], 99.90th=[105382], 99.95th=[109577], | 99.99th=[109577] bw ( KiB/s): min= 47, max= 176, per=25.29%, avg=116.59, stdev=32.95, samples=102 iops : min= 11, max= 44, avg=28.77, stdev= 8.35, samples=102 write: IOPS=29, BW=120KiB/s (123kB/s)(6236KiB/52001msec); 0 zone resets clat (usec): min=668, max=675654, avg=16676.14, stdev=22150.63 lat (usec): min=668, max=675654, avg=16676.81, stdev=22150.64 clat percentiles (usec): | 1.00th=[ 791], 5.00th=[ 1991], 10.00th=[ 2737], 20.00th=[ 3589], | 30.00th=[ 5604], 40.00th=[ 9241], 50.00th=[ 12518], 60.00th=[ 16057], | 70.00th=[ 20841], 80.00th=[ 26870], 90.00th=[ 35914], 95.00th=[ 43779], | 99.00th=[ 61080], 99.50th=[ 81265], 99.90th=[125305], 99.95th=[675283], | 99.99th=[675283] bw ( KiB/s): min= 13, max= 216, per=24.70%, avg=119.31, stdev=39.57, samples=103 iops : min= 3, max= 54, avg=29.46, stdev= 9.94, samples=103 lat (usec) : 50=0.10%, 100=0.59%, 250=1.53%, 500=0.26%, 750=0.36% lat (usec) : 1000=0.75% lat (msec) : 2=1.60%, 4=8.95%, 10=20.41%, 20=35.06%, 50=27.99% lat (msec) : 100=2.18%, 250=0.20%, 750=0.03% cpu : usr=0.11%, sys=26.45%, ctx=8221, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=462KiB/s (473kB/s), 115KiB/s-116KiB/s (117kB/s-119kB/s), io=23.4MiB (24.6MB), run=51675-52001msec WRITE: bw=483KiB/s (495kB/s), 120KiB/s-122KiB/s (123kB/s-125kB/s), io=24.6MiB (25.7MB), run=51675-52001msec rand-rw: (groupid=0, jobs=1): err= 0: pid=158627: Thu Oct 1 14:54:59 2026 read: IOPS=18, BW=74.2KiB/s (75.0kB/s)(5992KiB/80750msec) clat (msec): min=2, max=719, avg=14.06, stdev=23.40 lat (msec): min=2, max=719, avg=14.06, stdev=23.40 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 4], 10.00th=[ 4], 20.00th=[ 5], | 30.00th=[ 5], 40.00th=[ 6], 50.00th=[ 7], 60.00th=[ 11], | 70.00th=[ 16], 80.00th=[ 22], 90.00th=[ 34], 95.00th=[ 44], | 99.00th=[ 66], 99.50th=[ 90], 99.90th=[ 142], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 15, max= 200, per=25.11%, avg=74.33, stdev=44.15, samples=159 iops : min= 3, max= 50, avg=18.40, stdev=11.14, samples=159 write: IOPS=19, BW=77.0KiB/s (79.8kB/s)(6296KiB/80750msec); 0 zone resets clat (msec): min=14, max=196, avg=37.79, stdev=19.12 lat (msec): min=14, max=196, avg=37.79, stdev=19.12 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 20], 10.00th=[ 22], 20.00th=[ 24], | 30.00th=[ 27], 40.00th=[ 29], 50.00th=[ 32], 60.00th=[ 36], | 70.00th=[ 41], 80.00th=[ 51], 90.00th=[ 64], 95.00th=[ 75], | 99.00th=[ 101], 99.50th=[ 128], 99.90th=[ 180], 99.95th=[ 197], | 99.99th=[ 197] bw ( KiB/s): min= 24, max= 144, per=25.16%, avg=78.00, stdev=36.55, samples=159 iops : min= 6, max= 36, avg=19.32, stdev= 9.26, samples=159 lat (msec) : 4=8.79%, 10=20.44%, 20=11.98%, 50=46.78%, 100=11.39% lat (msec) : 250=0.59%, 750=0.03% cpu : usr=0.05%, sys=7.11%, ctx=5469, 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=158628: Thu Oct 1 14:54:59 2026 read: IOPS=18, BW=73.5KiB/s (75.2kB/s)(5940KiB/80868msec) clat (msec): min=2, max=682, avg=14.57, stdev=23.99 lat (msec): min=2, max=682, avg=14.57, stdev=23.99 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 4], 10.00th=[ 4], 20.00th=[ 5], | 30.00th=[ 6], 40.00th=[ 6], 50.00th=[ 7], 60.00th=[ 11], | 70.00th=[ 15], 80.00th=[ 22], 90.00th=[ 33], 95.00th=[ 47], | 99.00th=[ 84], 99.50th=[ 116], 99.90th=[ 180], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 7, max= 200, per=25.11%, avg=74.33, stdev=43.98, samples=159 iops : min= 1, max= 50, avg=18.40, stdev=11.11, samples=159 write: IOPS=19, BW=78.5KiB/s (80.4kB/s)(6348KiB/80868msec); 0 zone resets clat (msec): min=11, max=197, avg=37.20, stdev=18.25 lat (msec): min=11, max=197, avg=37.21, stdev=18.25 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 20], 10.00th=[ 22], 20.00th=[ 24], | 30.00th=[ 27], 40.00th=[ 29], 50.00th=[ 32], 60.00th=[ 35], | 70.00th=[ 41], 80.00th=[ 48], 90.00th=[ 61], 95.00th=[ 72], | 99.00th=[ 102], 99.50th=[ 116], 99.90th=[ 197], 99.95th=[ 197], | 99.99th=[ 197] bw ( KiB/s): min= 16, max= 168, per=25.42%, avg=78.81, stdev=36.95, samples=160 iops : min= 4, max= 42, avg=19.52, stdev= 9.38, samples=160 lat (msec) : 4=7.36%, 10=21.65%, 20=11.39%, 50=48.27%, 100=10.45% lat (msec) : 250=0.85%, 750=0.03% cpu : usr=0.07%, sys=7.01%, ctx=5510, 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=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=158629: Thu Oct 1 14:54:59 2026 read: IOPS=18, BW=74.6KiB/s (76.3kB/s)(6028KiB/80857msec) clat (msec): min=2, max=181, avg=13.97, stdev=15.40 lat (msec): min=2, max=181, avg=13.97, stdev=15.40 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 4], 10.00th=[ 4], 20.00th=[ 5], | 30.00th=[ 6], 40.00th=[ 6], 50.00th=[ 8], 60.00th=[ 11], | 70.00th=[ 16], 80.00th=[ 22], 90.00th=[ 34], 95.00th=[ 46], | 99.00th=[ 71], 99.50th=[ 89], 99.90th=[ 118], 99.95th=[ 182], | 99.99th=[ 182] bw ( KiB/s): min= 15, max= 216, per=25.45%, avg=75.33, stdev=42.40, samples=159 iops : min= 3, max= 54, avg=18.65, stdev=10.71, samples=159 write: IOPS=19, BW=77.4KiB/s (79.3kB/s)(6260KiB/80857msec); 0 zone resets clat (msec): min=13, max=686, avg=38.09, stdev=25.24 lat (msec): min=13, max=686, avg=38.09, stdev=25.24 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 20], 10.00th=[ 22], 20.00th=[ 24], | 30.00th=[ 26], 40.00th=[ 29], 50.00th=[ 32], 60.00th=[ 35], | 70.00th=[ 41], 80.00th=[ 50], 90.00th=[ 64], 95.00th=[ 78], | 99.00th=[ 103], 99.50th=[ 132], 99.90th=[ 171], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 23, max= 152, per=25.07%, avg=77.71, stdev=37.87, samples=160 iops : min= 5, max= 38, avg=19.25, stdev= 9.60, samples=160 lat (msec) : 4=7.00%, 10=22.30%, 20=12.17%, 50=46.68%, 100=11.17% lat (msec) : 250=0.65%, 750=0.03% cpu : usr=0.06%, sys=7.03%, ctx=5534, 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=158630: Thu Oct 1 14:54:59 2026 read: IOPS=18, BW=75.3KiB/s (77.1kB/s)(6052KiB/80343msec) clat (msec): min=2, max=143, avg=14.03, stdev=15.15 lat (msec): min=2, max=143, avg=14.04, stdev=15.15 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 4], 10.00th=[ 4], 20.00th=[ 5], | 30.00th=[ 6], 40.00th=[ 6], 50.00th=[ 8], 60.00th=[ 11], | 70.00th=[ 16], 80.00th=[ 22], 90.00th=[ 33], 95.00th=[ 44], | 99.00th=[ 72], 99.50th=[ 91], 99.90th=[ 126], 99.95th=[ 144], | 99.99th=[ 144] bw ( KiB/s): min= 8, max= 208, per=25.62%, avg=75.84, stdev=43.30, samples=159 iops : min= 2, max= 52, avg=18.78, stdev=10.93, samples=159 write: IOPS=19, BW=77.6KiB/s (79.5kB/s)(6236KiB/80343msec); 0 zone resets clat (msec): min=15, max=694, avg=37.79, stdev=24.73 lat (msec): min=15, max=694, avg=37.79, stdev=24.73 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 21], 10.00th=[ 22], 20.00th=[ 24], | 30.00th=[ 27], 40.00th=[ 29], 50.00th=[ 32], 60.00th=[ 36], | 70.00th=[ 41], 80.00th=[ 49], 90.00th=[ 62], 95.00th=[ 75], | 99.00th=[ 100], 99.50th=[ 114], 99.90th=[ 178], 99.95th=[ 693], | 99.99th=[ 693] bw ( KiB/s): min= 7, max= 160, per=25.18%, avg=78.05, stdev=36.24, samples=159 iops : min= 1, max= 40, avg=19.33, stdev= 9.19, samples=159 lat (msec) : 4=7.32%, 10=21.74%, 20=11.95%, 50=48.08%, 100=10.29% lat (msec) : 250=0.59%, 750=0.03% cpu : usr=0.08%, sys=7.15%, ctx=5524, 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=297KiB/s (304kB/s), 73.5KiB/s-75.3KiB/s (75.2kB/s-77.1kB/s), io=23.4MiB (24.6MB), run=80343-80868msec WRITE: bw=311KiB/s (318kB/s), 77.4KiB/s-78.5KiB/s (79.3kB/s-80.4kB/s), io=24.6MiB (25.7MB), run=80343-80868msec 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=158661: Thu Oct 1 14:55:20 2026 read: IOPS=24, BW=395KiB/s (404kB/s)(5920KiB/14991msec) clat (usec): min=40, max=81641, avg=19572.12, stdev=12833.10 lat (usec): min=40, max=81641, avg=19573.73, stdev=12834.41 clat percentiles (usec): | 1.00th=[ 70], 5.00th=[ 143], 10.00th=[ 227], 20.00th=[10945], | 30.00th=[12649], 40.00th=[15664], 50.00th=[17957], 60.00th=[20055], | 70.00th=[23462], 80.00th=[28181], 90.00th=[35390], 95.00th=[41681], | 99.00th=[64750], 99.50th=[76022], 99.90th=[81265], 99.95th=[81265], | 99.99th=[81265] bw ( KiB/s): min= 192, max= 672, per=25.01%, avg=388.41, stdev=133.91, samples=29 iops : min= 12, max= 42, avg=23.83, stdev= 8.36, samples=29 write: IOPS=26, BW=425KiB/s (435kB/s)(6368KiB/14991msec); 0 zone resets clat (usec): min=1192, max=93975, avg=19402.68, stdev=14422.04 lat (usec): min=1192, max=93977, avg=19403.91, stdev=14422.20 clat percentiles (usec): | 1.00th=[ 1647], 5.00th=[ 3785], 10.00th=[ 4686], 20.00th=[ 6587], | 30.00th=[ 8848], 40.00th=[11731], 50.00th=[15664], 60.00th=[20579], | 70.00th=[24511], 80.00th=[30802], 90.00th=[40109], 95.00th=[46924], | 99.00th=[60031], 99.50th=[73925], 99.90th=[93848], 99.95th=[93848], | 99.99th=[93848] bw ( KiB/s): min= 158, max= 702, per=25.84%, avg=422.28, stdev=121.95, samples=29 iops : min= 9, max= 43, avg=25.93, stdev= 7.69, samples=29 lat (usec) : 50=0.13%, 100=0.78%, 250=4.04%, 500=0.65% lat (msec) : 2=0.78%, 4=2.21%, 10=16.41%, 20=33.59%, 50=38.54% lat (msec) : 100=2.86% cpu : usr=0.09%, sys=31.47%, ctx=2717, 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=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=158662: Thu Oct 1 14:55:20 2026 read: IOPS=23, BW=372KiB/s (381kB/s)(5744KiB/15421msec) clat (usec): min=36, max=98780, avg=20974.21, stdev=13620.91 lat (usec): min=36, max=98780, avg=20974.95, stdev=13620.93 clat percentiles (usec): | 1.00th=[ 71], 5.00th=[ 143], 10.00th=[ 7111], 20.00th=[10945], | 30.00th=[14353], 40.00th=[16581], 50.00th=[19006], 60.00th=[21890], | 70.00th=[25035], 80.00th=[30278], 90.00th=[35914], 95.00th=[47973], | 99.00th=[72877], 99.50th=[84411], 99.90th=[99091], 99.95th=[99091], | 99.99th=[99091] bw ( KiB/s): min= 191, max= 608, per=23.72%, avg=368.33, stdev=118.81, samples=30 iops : min= 11, max= 38, avg=22.57, stdev= 7.54, samples=30 write: IOPS=26, BW=424KiB/s (435kB/s)(6544KiB/15421msec); 0 zone resets clat (usec): min=1040, max=100312, avg=19116.97, stdev=14318.53 lat (usec): min=1041, max=100314, avg=19118.21, stdev=14318.66 clat percentiles (usec): | 1.00th=[ 1172], 5.00th=[ 3326], 10.00th=[ 4752], 20.00th=[ 6849], | 30.00th=[ 9634], 40.00th=[ 12780], 50.00th=[ 15664], 60.00th=[ 19006], | 70.00th=[ 23987], 80.00th=[ 30016], 90.00th=[ 38011], 95.00th=[ 45876], | 99.00th=[ 61604], 99.50th=[ 67634], 99.90th=[100140], 99.95th=[100140], | 99.99th=[100140] bw ( KiB/s): min= 222, max= 608, per=25.18%, avg=411.47, stdev=109.69, samples=30 iops : min= 13, max= 38, avg=25.27, stdev= 7.01, samples=30 lat (usec) : 50=0.13%, 100=1.04%, 250=2.73%, 500=0.26% lat (msec) : 2=1.69%, 4=1.82%, 10=16.67%, 20=33.33%, 50=38.54% lat (msec) : 100=3.65%, 250=0.13% cpu : usr=0.11%, sys=31.04%, ctx=2675, 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=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=158663: Thu Oct 1 14:55:20 2026 read: IOPS=25, BW=415KiB/s (425kB/s)(6256KiB/15082msec) clat (usec): min=38, max=81103, avg=20960.79, stdev=13261.01 lat (usec): min=39, max=81105, avg=20961.56, stdev=13261.10 clat percentiles (usec): | 1.00th=[ 44], 5.00th=[ 141], 10.00th=[ 347], 20.00th=[11207], | 30.00th=[14091], 40.00th=[16450], 50.00th=[19268], 60.00th=[21890], | 70.00th=[25560], 80.00th=[30278], 90.00th=[36963], 95.00th=[46924], | 99.00th=[63701], 99.50th=[65799], 99.90th=[81265], 99.95th=[81265], | 99.99th=[81265] bw ( KiB/s): min= 189, max= 672, per=26.73%, avg=415.17, stdev=127.29, samples=29 iops : min= 11, max= 42, avg=25.48, stdev= 7.99, samples=29 write: IOPS=24, BW=400KiB/s (410kB/s)(6032KiB/15082msec); 0 zone resets clat (usec): min=1137, max=88086, avg=18113.55, stdev=13486.86 lat (usec): min=1137, max=88087, avg=18114.73, stdev=13486.84 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 3556], 10.00th=[ 4359], 20.00th=[ 5735], | 30.00th=[ 8455], 40.00th=[11731], 50.00th=[14746], 60.00th=[18220], | 70.00th=[23462], 80.00th=[30016], 90.00th=[36439], 95.00th=[42730], | 99.00th=[60031], 99.50th=[82314], 99.90th=[88605], 99.95th=[88605], | 99.99th=[88605] bw ( KiB/s): min= 158, max= 640, per=24.01%, avg=392.28, stdev=133.68, samples=29 iops : min= 9, max= 40, avg=24.07, stdev= 8.35, samples=29 lat (usec) : 50=0.52%, 100=0.26%, 250=3.65%, 500=0.78% lat (msec) : 2=1.17%, 4=2.21%, 10=15.89%, 20=33.46%, 50=38.67% lat (msec) : 100=3.39% cpu : usr=0.06%, sys=31.19%, ctx=2661, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=158664: Thu Oct 1 14:55:20 2026 read: IOPS=24, BW=395KiB/s (404kB/s)(6032KiB/15288msec) clat (usec): min=34, max=94124, avg=20625.74, stdev=13195.10 lat (usec): min=34, max=94125, avg=20626.50, stdev=13195.21 clat percentiles (usec): | 1.00th=[ 75], 5.00th=[ 113], 10.00th=[ 221], 20.00th=[11469], | 30.00th=[14222], 40.00th=[16450], 50.00th=[19268], 60.00th=[22152], | 70.00th=[25035], 80.00th=[29754], 90.00th=[36439], 95.00th=[41681], | 99.00th=[63177], 99.50th=[77071], 99.90th=[93848], 99.95th=[93848], | 99.99th=[93848] bw ( KiB/s): min= 221, max= 704, per=25.14%, avg=390.37, stdev=139.53, samples=30 iops : min= 13, max= 44, avg=23.97, stdev= 8.79, samples=30 write: IOPS=25, BW=409KiB/s (419kB/s)(6256KiB/15288msec); 0 zone resets clat (usec): min=1026, max=73655, avg=18957.99, stdev=13955.82 lat (usec): min=1026, max=73656, avg=18959.15, stdev=13955.86 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 3785], 10.00th=[ 4555], 20.00th=[ 6456], | 30.00th=[ 8979], 40.00th=[11469], 50.00th=[15926], 60.00th=[20055], | 70.00th=[23462], 80.00th=[31065], 90.00th=[38536], 95.00th=[45351], | 99.00th=[63177], 99.50th=[71828], 99.90th=[73925], 99.95th=[73925], | 99.99th=[73925] bw ( KiB/s): min= 191, max= 768, per=24.92%, avg=407.13, stdev=147.08, samples=30 iops : min= 11, max= 48, avg=25.00, stdev= 9.30, samples=30 lat (usec) : 50=0.26%, 100=1.30%, 250=3.78%, 500=0.13% lat (msec) : 2=0.91%, 4=1.82%, 10=17.58%, 20=30.60%, 50=41.02% lat (msec) : 100=2.60% cpu : usr=0.11%, sys=31.37%, ctx=2548, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=1553KiB/s (1590kB/s), 372KiB/s-415KiB/s (381kB/s-425kB/s), io=23.4MiB (24.5MB), run=14991-15421msec WRITE: bw=1634KiB/s (1673kB/s), 400KiB/s-425KiB/s (410kB/s-435kB/s), io=24.6MiB (25.8MB), run=14991-15421msec fio: pid=158658, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=158656: Thu Oct 1 14:55:27 2026 read: IOPS=16, BW=271KiB/s (277kB/s)(5920KiB/21853msec) clat (msec): min=3, max=129, avg=18.21, stdev=21.23 lat (msec): min=3, max=129, avg=18.21, stdev=21.23 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 4], 10.00th=[ 5], 20.00th=[ 6], | 30.00th=[ 6], 40.00th=[ 7], 50.00th=[ 10], 60.00th=[ 14], | 70.00th=[ 20], 80.00th=[ 26], 90.00th=[ 43], 95.00th=[ 72], | 99.00th=[ 104], 99.50th=[ 112], 99.90th=[ 130], 99.95th=[ 130], | 99.99th=[ 130] bw ( KiB/s): min= 95, max= 640, per=25.11%, avg=265.16, stdev=144.99, samples=43 iops : min= 5, max= 40, avg=16.30, stdev= 9.24, samples=43 write: IOPS=18, BW=291KiB/s (298kB/s)(6368KiB/21853msec); 0 zone resets clat (msec): min=14, max=122, avg=37.88, stdev=19.18 lat (msec): min=14, max=122, avg=37.88, stdev=19.18 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 19], 10.00th=[ 22], 20.00th=[ 24], | 30.00th=[ 27], 40.00th=[ 29], 50.00th=[ 33], 60.00th=[ 36], | 70.00th=[ 41], 80.00th=[ 49], 90.00th=[ 65], 95.00th=[ 80], | 99.00th=[ 108], 99.50th=[ 112], 99.90th=[ 124], 99.95th=[ 124], | 99.99th=[ 124] bw ( KiB/s): min= 32, max= 608, per=25.88%, avg=288.51, stdev=151.79, samples=43 iops : min= 2, max= 38, avg=17.77, stdev= 9.66, samples=43 lat (msec) : 4=2.60%, 10=22.01%, 20=13.54%, 50=47.92%, 100=12.24% lat (msec) : 250=1.69% cpu : usr=0.11%, sys=9.38%, ctx=1566, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=158657: Thu Oct 1 14:55:27 2026 read: IOPS=16, BW=265KiB/s (272kB/s)(5744KiB/21648msec) clat (usec): min=3156, max=94420, avg=17088.29, stdev=16911.87 lat (usec): min=3156, max=94421, avg=17089.04, stdev=16911.84 clat percentiles (usec): | 1.00th=[ 3490], 5.00th=[ 3884], 10.00th=[ 4293], 20.00th=[ 5145], | 30.00th=[ 5800], 40.00th=[ 7373], 50.00th=[10159], 60.00th=[14615], | 70.00th=[19268], 80.00th=[27132], 90.00th=[39060], 95.00th=[56886], | 99.00th=[78119], 99.50th=[93848], 99.90th=[94897], 99.95th=[94897], | 99.99th=[94897] bw ( KiB/s): min= 63, max= 704, per=25.07%, avg=264.74, stdev=167.23, samples=42 iops : min= 3, max= 44, avg=16.26, stdev=10.62, samples=42 write: IOPS=18, BW=302KiB/s (310kB/s)(6544KiB/21648msec); 0 zone resets clat (msec): min=15, max=153, avg=37.83, stdev=19.31 lat (msec): min=15, max=153, avg=37.83, stdev=19.31 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 20], 10.00th=[ 22], 20.00th=[ 24], | 30.00th=[ 26], 40.00th=[ 29], 50.00th=[ 32], 60.00th=[ 37], | 70.00th=[ 42], 80.00th=[ 50], 90.00th=[ 64], 95.00th=[ 77], | 99.00th=[ 104], 99.50th=[ 109], 99.90th=[ 153], 99.95th=[ 153], | 99.99th=[ 153] bw ( KiB/s): min= 127, max= 640, per=26.52%, avg=295.69, stdev=140.39, samples=42 iops : min= 7, max= 40, avg=18.21, stdev= 8.99, samples=42 lat (msec) : 4=2.73%, 10=20.57%, 20=13.80%, 50=49.61%, 100=12.37% lat (msec) : 250=0.91% cpu : usr=0.07%, sys=9.66%, ctx=1599, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=158658: Thu Oct 1 14:55:27 2026 read: IOPS=17, BW=272KiB/s (278kB/s)(5520KiB/20314msec) clat (msec): min=3, max=118, avg=19.36, stdev=20.07 lat (msec): min=3, max=118, avg=19.37, stdev=20.07 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 5], 10.00th=[ 5], 20.00th=[ 6], | 30.00th=[ 8], 40.00th=[ 9], 50.00th=[ 12], 60.00th=[ 16], | 70.00th=[ 21], 80.00th=[ 29], 90.00th=[ 46], 95.00th=[ 63], | 99.00th=[ 104], 99.50th=[ 105], 99.90th=[ 118], 99.95th=[ 118], | 99.99th=[ 118] bw ( KiB/s): min= 64, max= 896, per=25.25%, avg=266.65, stdev=168.87, samples=40 iops : min= 4, max= 56, avg=16.38, stdev=10.70, samples=40 write: IOPS=16, BW=263KiB/s (269kB/s)(5344KiB/20314msec); 0 zone resets clat (msec): min=15, max=122, avg=40.74, stdev=20.00 lat (msec): min=15, max=122, avg=40.74, stdev=20.00 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 21], 10.00th=[ 23], 20.00th=[ 26], | 30.00th=[ 29], 40.00th=[ 31], 50.00th=[ 34], 60.00th=[ 39], | 70.00th=[ 47], 80.00th=[ 55], 90.00th=[ 67], 95.00th=[ 84], | 99.00th=[ 106], 99.50th=[ 115], 99.90th=[ 123], 99.95th=[ 123], | 99.99th=[ 123] bw ( KiB/s): min= 95, max= 544, per=23.57%, avg=262.80, stdev=131.54, samples=40 iops : min= 5, max= 34, avg=16.12, stdev= 8.43, samples=40 lat (msec) : 4=2.50%, 10=20.74%, 20=13.68%, 50=46.03%, 100=15.29% lat (msec) : 250=1.62% cpu : usr=0.05%, sys=9.77%, ctx=1430, 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=346,334,0,0 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=158659: Thu Oct 1 14:55:27 2026 read: IOPS=17, BW=274KiB/s (281kB/s)(6032KiB/21976msec) clat (msec): min=2, max=124, avg=17.12, stdev=18.95 lat (msec): min=2, max=124, avg=17.12, stdev=18.95 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 4], 10.00th=[ 5], 20.00th=[ 5], | 30.00th=[ 6], 40.00th=[ 8], 50.00th=[ 10], 60.00th=[ 13], | 70.00th=[ 19], 80.00th=[ 24], 90.00th=[ 41], 95.00th=[ 69], | 99.00th=[ 86], 99.50th=[ 100], 99.90th=[ 125], 99.95th=[ 125], | 99.99th=[ 125] bw ( KiB/s): min= 31, max= 704, per=25.32%, avg=267.35, stdev=148.35, samples=43 iops : min= 1, max= 44, avg=16.44, stdev= 9.49, samples=43 write: IOPS=17, BW=285KiB/s (292kB/s)(6256KiB/21976msec); 0 zone resets clat (msec): min=14, max=157, avg=39.58, stdev=22.43 lat (msec): min=14, max=157, avg=39.58, stdev=22.43 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 20], 10.00th=[ 22], 20.00th=[ 24], | 30.00th=[ 27], 40.00th=[ 29], 50.00th=[ 32], 60.00th=[ 35], | 70.00th=[ 42], 80.00th=[ 52], 90.00th=[ 72], 95.00th=[ 88], | 99.00th=[ 121], 99.50th=[ 134], 99.90th=[ 157], 99.95th=[ 157], | 99.99th=[ 157] bw ( KiB/s): min= 64, max= 576, per=24.99%, avg=278.67, stdev=147.54, samples=43 iops : min= 4, max= 36, avg=17.14, stdev= 9.40, samples=43 lat (msec) : 4=4.43%, 10=20.57%, 20=14.71%, 50=45.57%, 100=13.15% lat (msec) : 250=1.56% cpu : usr=0.08%, sys=9.43%, ctx=1570, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=1056KiB/s (1082kB/s), 265KiB/s-274KiB/s (272kB/s-281kB/s), io=22.7MiB (23.8MB), run=20314-21976msec WRITE: bw=1115KiB/s (1142kB/s), 263KiB/s-302KiB/s (269kB/s-310kB/s), io=23.9MiB (25.1MB), run=20314-21976msec 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=158673: Thu Oct 1 14:55:36 2026 read: IOPS=3, BW=3260KiB/s (3338kB/s)(7168KiB/2199msec) clat (msec): min=53, max=303, avg=132.11, stdev=83.94 lat (msec): min=53, max=303, avg=132.11, stdev=83.94 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 54], 10.00th=[ 54], 20.00th=[ 62], | 30.00th=[ 94], 40.00th=[ 94], 50.00th=[ 131], 60.00th=[ 136], | 70.00th=[ 136], 80.00th=[ 146], 90.00th=[ 305], 95.00th=[ 305], | 99.00th=[ 305], 99.50th=[ 305], 99.90th=[ 305], 99.95th=[ 305], | 99.99th=[ 305] bw ( KiB/s): min= 2039, max= 5710, per=63.45%, avg=3948.33, stdev=1839.95, samples=3 iops : min= 1, max= 5, avg= 3.33, stdev= 2.08, samples=3 write: IOPS=2, BW=2328KiB/s (2384kB/s)(5120KiB/2199msec); 0 zone resets clat (msec): min=163, max=404, avg=247.88, stdev=95.98 lat (msec): min=163, max=404, avg=247.94, stdev=95.98 clat percentiles (msec): | 1.00th=[ 163], 5.00th=[ 163], 10.00th=[ 163], 20.00th=[ 163], | 30.00th=[ 184], 40.00th=[ 184], 50.00th=[ 224], 60.00th=[ 224], | 70.00th=[ 266], 80.00th=[ 266], 90.00th=[ 405], 95.00th=[ 405], | 99.00th=[ 405], 99.50th=[ 405], 99.90th=[ 405], 99.95th=[ 405], | 99.99th=[ 405] bw ( KiB/s): min= 2039, max= 5807, per=37.86%, avg=3298.00, stdev=2172.86, samples=3 iops : min= 1, max= 5, avg= 2.67, stdev= 2.08, samples=3 lat (msec) : 100=25.00%, 250=50.00%, 500=25.00% cpu : usr=0.00%, sys=18.24%, ctx=107, 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=158675: Thu Oct 1 14:55:36 2026 read: IOPS=0, BW=658KiB/s (673kB/s)(2048KiB/3114msec) clat (msec): min=221, max=268, avg=244.74, stdev=33.05 lat (msec): min=221, max=268, avg=244.74, stdev=33.06 clat percentiles (msec): | 1.00th=[ 222], 5.00th=[ 222], 10.00th=[ 222], 20.00th=[ 222], | 30.00th=[ 222], 40.00th=[ 222], 50.00th=[ 222], 60.00th=[ 268], | 70.00th=[ 268], 80.00th=[ 268], 90.00th=[ 268], 95.00th=[ 268], | 99.00th=[ 268], 99.50th=[ 268], 99.90th=[ 268], 99.95th=[ 268], | 99.99th=[ 268] bw ( KiB/s): min= 1903, max= 2039, per=31.67%, avg=1971.00, stdev=96.17, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=3, BW=3288KiB/s (3367kB/s)(10.0MiB/3114msec); 0 zone resets clat (msec): min=111, max=453, avg=261.36, stdev=115.41 lat (msec): min=111, max=453, avg=261.44, stdev=115.40 clat percentiles (msec): | 1.00th=[ 112], 5.00th=[ 112], 10.00th=[ 112], 20.00th=[ 136], | 30.00th=[ 186], 40.00th=[ 222], 50.00th=[ 226], 60.00th=[ 243], | 70.00th=[ 247], 80.00th=[ 397], 90.00th=[ 397], 95.00th=[ 456], | 99.00th=[ 456], 99.50th=[ 456], 99.90th=[ 456], 99.95th=[ 456], | 99.99th=[ 456] bw ( KiB/s): min= 1935, max= 6144, per=41.90%, avg=3650.40, stdev=1739.59, samples=5 iops : min= 1, max= 6, avg= 2.80, stdev= 2.05, samples=5 lat (msec) : 250=66.67%, 500=33.33% cpu : usr=0.10%, sys=16.64%, ctx=219, 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=158677: Thu Oct 1 14:55:36 2026 read: IOPS=1, BW=1867KiB/s (1912kB/s)(6144KiB/3291msec) clat (msec): min=73, max=509, avg=267.16, stdev=168.77 lat (msec): min=73, max=509, avg=267.16, stdev=168.77 clat percentiles (msec): | 1.00th=[ 74], 5.00th=[ 74], 10.00th=[ 74], 20.00th=[ 140], | 30.00th=[ 140], 40.00th=[ 180], 50.00th=[ 180], 60.00th=[ 284], | 70.00th=[ 418], 80.00th=[ 418], 90.00th=[ 510], 95.00th=[ 510], | 99.00th=[ 510], 99.50th=[ 510], 99.90th=[ 510], 99.95th=[ 510], | 99.99th=[ 510] bw ( KiB/s): min= 1935, max= 4079, per=40.49%, avg=2520.00, stdev=1040.37, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=1, BW=1867KiB/s (1912kB/s)(6144KiB/3291msec); 0 zone resets clat (msec): min=113, max=700, avg=276.54, stdev=220.84 lat (msec): min=113, max=700, avg=276.61, stdev=220.84 clat percentiles (msec): | 1.00th=[ 114], 5.00th=[ 114], 10.00th=[ 114], 20.00th=[ 132], | 30.00th=[ 132], 40.00th=[ 155], 50.00th=[ 155], 60.00th=[ 255], | 70.00th=[ 305], 80.00th=[ 305], 90.00th=[ 701], 95.00th=[ 701], | 99.00th=[ 701], 99.50th=[ 701], 99.90th=[ 701], 99.95th=[ 701], | 99.99th=[ 701] bw ( KiB/s): min= 1935, max= 3923, per=28.51%, avg=2484.00, stdev=960.59, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 100=8.33%, 250=41.67%, 500=33.33%, 750=16.67% cpu : usr=0.00%, sys=13.47%, ctx=83, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=158679: Thu Oct 1 14:55:36 2026 read: IOPS=1, BW=1578KiB/s (1616kB/s)(5120KiB/3244msec) clat (msec): min=56, max=526, avg=187.66, stdev=195.18 lat (msec): min=56, max=526, avg=187.66, stdev=195.18 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 57], 10.00th=[ 57], 20.00th=[ 57], | 30.00th=[ 58], 40.00th=[ 58], 50.00th=[ 142], 60.00th=[ 142], | 70.00th=[ 157], 80.00th=[ 157], 90.00th=[ 527], 95.00th=[ 527], | 99.00th=[ 527], 99.50th=[ 527], 99.90th=[ 527], 99.95th=[ 527], | 99.99th=[ 527] bw ( KiB/s): min= 2027, max= 6119, per=65.45%, avg=4073.00, stdev=2893.48, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=2, BW=2210KiB/s (2263kB/s)(7168KiB/3244msec); 0 zone resets clat (msec): min=78, max=726, avg=327.03, stdev=243.06 lat (msec): min=78, max=726, avg=327.10, stdev=243.07 clat percentiles (msec): | 1.00th=[ 79], 5.00th=[ 79], 10.00th=[ 79], 20.00th=[ 113], | 30.00th=[ 136], 40.00th=[ 136], 50.00th=[ 313], 60.00th=[ 380], | 70.00th=[ 380], 80.00th=[ 542], 90.00th=[ 726], 95.00th=[ 726], | 99.00th=[ 726], 99.50th=[ 726], 99.90th=[ 726], 99.95th=[ 726], | 99.99th=[ 726] bw ( KiB/s): min= 1946, max= 3871, per=28.39%, avg=2473.75, stdev=932.53, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 100=25.00%, 250=33.33%, 500=16.67%, 750=25.00% cpu : usr=0.06%, sys=14.46%, ctx=259, 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=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=6223KiB/s (6372kB/s), 658KiB/s-3260KiB/s (673kB/s-3338kB/s), io=20.0MiB (20.0MB), run=2199-3291msec WRITE: bw=8712KiB/s (8921kB/s), 1867KiB/s-3288KiB/s (1912kB/s-3367kB/s), io=28.0MiB (29.4MB), run=2199-3291msec rand-rw: (groupid=0, jobs=1): err= 0: pid=158674: Thu Oct 1 14:55:36 2026 read: IOPS=2, BW=3046KiB/s (3119kB/s)(7168KiB/2353msec) clat (usec): min=586, max=239494, avg=142496.67, stdev=78914.52 lat (usec): min=587, max=239495, avg=142497.79, stdev=78914.43 clat percentiles (usec): | 1.00th=[ 586], 5.00th=[ 586], 10.00th=[ 586], 20.00th=[106431], | 30.00th=[117965], 40.00th=[117965], 50.00th=[147850], 60.00th=[168821], | 70.00th=[168821], 80.00th=[214959], 90.00th=[240124], 95.00th=[240124], | 99.00th=[240124], 99.50th=[240124], 99.90th=[240124], 99.95th=[240124], | 99.99th=[240124] bw ( KiB/s): min= 1935, max= 5953, per=52.45%, avg=3312.00, stdev=2287.87, samples=3 iops : min= 1, max= 5, avg= 2.67, stdev= 2.08, samples=3 write: IOPS=2, BW=2176KiB/s (2228kB/s)(5120KiB/2353msec); 0 zone resets clat (msec): min=164, max=379, avg=263.49, stdev=77.41 lat (msec): min=164, max=379, avg=263.55, stdev=77.40 clat percentiles (msec): | 1.00th=[ 165], 5.00th=[ 165], 10.00th=[ 165], 20.00th=[ 165], | 30.00th=[ 241], 40.00th=[ 241], 50.00th=[ 264], 60.00th=[ 264], | 70.00th=[ 271], 80.00th=[ 271], 90.00th=[ 380], 95.00th=[ 380], | 99.00th=[ 380], 99.50th=[ 380], 99.90th=[ 380], 99.95th=[ 380], | 99.99th=[ 380] bw ( KiB/s): min= 1935, max= 4079, per=30.40%, avg=2687.33, stdev=1206.54, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 lat (usec) : 750=8.33% lat (msec) : 250=66.67%, 500=25.00% cpu : usr=0.00%, sys=51.70%, ctx=791, 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=158676: Thu Oct 1 14:55:36 2026 read: IOPS=0, BW=632KiB/s (647kB/s)(2048KiB/3243msec) clat (usec): min=499, max=348808, avg=174654.12, stdev=246291.54 lat (usec): min=500, max=348810, avg=174655.38, stdev=246292.39 clat percentiles (usec): | 1.00th=[ 498], 5.00th=[ 498], 10.00th=[ 498], 20.00th=[ 498], | 30.00th=[ 498], 40.00th=[ 498], 50.00th=[ 498], 60.00th=[350225], | 70.00th=[350225], 80.00th=[350225], 90.00th=[350225], 95.00th=[350225], | 99.00th=[350225], 99.50th=[350225], 99.90th=[350225], 99.95th=[350225], | 99.99th=[350225] bw ( KiB/s): min= 1988, max= 2039, per=31.88%, avg=2013.50, stdev=36.06, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=3, BW=3158KiB/s (3233kB/s)(10.0MiB/3243msec); 0 zone resets clat (msec): min=103, max=624, avg=284.96, stdev=159.04 lat (msec): min=103, max=624, avg=285.01, stdev=159.04 clat percentiles (msec): | 1.00th=[ 104], 5.00th=[ 104], 10.00th=[ 104], 20.00th=[ 165], | 30.00th=[ 176], 40.00th=[ 190], 50.00th=[ 201], 60.00th=[ 266], | 70.00th=[ 284], 80.00th=[ 414], 90.00th=[ 426], 95.00th=[ 625], | 99.00th=[ 625], 99.50th=[ 625], 99.90th=[ 625], 99.95th=[ 625], | 99.99th=[ 625] bw ( KiB/s): min= 2027, max= 4079, per=36.43%, avg=3220.80, stdev=1083.56, samples=5 iops : min= 1, max= 3, avg= 2.40, stdev= 0.89, samples=5 lat (usec) : 500=8.33% lat (msec) : 250=41.67%, 500=41.67%, 750=8.33% cpu : usr=0.00%, sys=41.86%, ctx=434, 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=158678: Thu Oct 1 14:55:36 2026 read: IOPS=2, BW=2479KiB/s (2539kB/s)(6144KiB/2478msec) clat (usec): min=361, max=189991, avg=81782.10, stdev=93299.79 lat (usec): min=362, max=189992, avg=81782.83, stdev=93299.90 clat percentiles (usec): | 1.00th=[ 363], 5.00th=[ 363], 10.00th=[ 363], 20.00th=[ 482], | 30.00th=[ 482], 40.00th=[ 486], 50.00th=[ 486], 60.00th=[112722], | 70.00th=[187696], 80.00th=[187696], 90.00th=[189793], 95.00th=[189793], | 99.00th=[189793], 99.50th=[189793], 99.90th=[189793], 99.95th=[189793], | 99.99th=[189793] bw ( KiB/s): min= 3871, max= 4079, per=62.95%, avg=3975.00, stdev=147.08, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2479KiB/s (2539kB/s)(6144KiB/2478msec); 0 zone resets clat (msec): min=191, max=651, avg=328.18, stdev=180.76 lat (msec): min=191, max=651, avg=328.22, stdev=180.78 clat percentiles (msec): | 1.00th=[ 192], 5.00th=[ 192], 10.00th=[ 192], 20.00th=[ 215], | 30.00th=[ 215], 40.00th=[ 218], 50.00th=[ 218], 60.00th=[ 264], | 70.00th=[ 430], 80.00th=[ 430], 90.00th=[ 651], 95.00th=[ 651], | 99.00th=[ 651], 99.50th=[ 651], 99.90th=[ 651], 99.95th=[ 651], | 99.99th=[ 651] bw ( KiB/s): min= 2031, max= 3871, per=29.97%, avg=2650.00, stdev=1057.45, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 lat (usec) : 500=25.00% lat (msec) : 250=50.00%, 500=16.67%, 750=8.33% cpu : usr=0.04%, sys=37.55%, ctx=189, 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=158680: Thu Oct 1 14:55:36 2026 read: IOPS=1, BW=1801KiB/s (1844kB/s)(5120KiB/2843msec) clat (usec): min=426, max=269794, avg=192787.14, stdev=110006.68 lat (usec): min=426, max=269795, avg=192787.98, stdev=110006.87 clat percentiles (usec): | 1.00th=[ 429], 5.00th=[ 429], 10.00th=[ 429], 20.00th=[ 429], | 30.00th=[204473], 40.00th=[204473], 50.00th=[242222], 60.00th=[242222], | 70.00th=[246416], 80.00th=[246416], 90.00th=[270533], 95.00th=[270533], | 99.00th=[270533], 99.50th=[270533], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 4055, max= 4079, per=64.40%, avg=4067.00, stdev=16.97, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2521KiB/s (2582kB/s)(7168KiB/2843msec); 0 zone resets clat (msec): min=117, max=691, avg=266.44, stdev=196.98 lat (msec): min=117, max=691, avg=266.50, stdev=196.99 clat percentiles (msec): | 1.00th=[ 117], 5.00th=[ 117], 10.00th=[ 117], 20.00th=[ 178], | 30.00th=[ 180], 40.00th=[ 180], 50.00th=[ 180], 60.00th=[ 203], | 70.00th=[ 203], 80.00th=[ 321], 90.00th=[ 693], 95.00th=[ 693], | 99.00th=[ 693], 99.50th=[ 693], 99.90th=[ 693], 99.95th=[ 693], | 99.99th=[ 693] bw ( KiB/s): min= 1924, max= 4096, per=33.96%, avg=3002.50, stdev=1239.11, samples=4 iops : min= 1, max= 4, avg= 2.25, stdev= 1.50, samples=4 lat (usec) : 500=8.33% lat (msec) : 250=66.67%, 500=16.67%, 750=8.33% cpu : usr=0.00%, sys=44.51%, ctx=394, 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=6315KiB/s (6467kB/s), 632KiB/s-3046KiB/s (647kB/s-3119kB/s), io=20.0MiB (20.0MB), run=2353-3243msec WRITE: bw=8841KiB/s (9053kB/s), 2176KiB/s-3158KiB/s (2228kB/s-3233kB/s), io=28.0MiB (29.4MB), run=2353-3243msec 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=158687: Thu Oct 1 14:55:45 2026 read: IOPS=2, BW=8690KiB/s (8899kB/s)(12.0MiB/1414msec) clat (msec): min=441, max=471, avg=455.89, stdev=15.33 lat (msec): min=441, max=471, avg=455.89, stdev=15.33 clat percentiles (msec): | 1.00th=[ 443], 5.00th=[ 443], 10.00th=[ 443], 20.00th=[ 443], | 30.00th=[ 443], 40.00th=[ 456], 50.00th=[ 456], 60.00th=[ 456], | 70.00th=[ 472], 80.00th=[ 472], 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= 5919, max= 8000, per=92.87%, avg=6959.50, stdev=1471.49, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=100.00% cpu : usr=0.00%, sys=52.87%, ctx=2758, 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=158688: Thu Oct 1 14:55:45 2026 read: IOPS=0, BW=1874KiB/s (1919kB/s)(4096KiB/2186msec) clat (nsec): min=418754k, max=418754k, avg=418753906.00, stdev= 0.00 lat (nsec): min=418756k, max=418756k, avg=418756388.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 418], 5.00th=[ 418], 10.00th=[ 418], 20.00th=[ 418], | 30.00th=[ 418], 40.00th=[ 418], 50.00th=[ 418], 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= 5876, max= 5876, per=78.41%, avg=5876.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3747KiB/s (3837kB/s)(8192KiB/2186msec); 0 zone resets clat (msec): min=421, max=1267, avg=844.40, stdev=598.22 lat (msec): min=421, max=1267, avg=844.74, stdev=598.27 clat percentiles (msec): | 1.00th=[ 422], 5.00th=[ 422], 10.00th=[ 422], 20.00th=[ 422], | 30.00th=[ 422], 40.00th=[ 422], 50.00th=[ 422], 60.00th=[ 1267], | 70.00th=[ 1267], 80.00th=[ 1267], 90.00th=[ 1267], 95.00th=[ 1267], | 99.00th=[ 1267], 99.50th=[ 1267], 99.90th=[ 1267], 99.95th=[ 1267], | 99.99th=[ 1267] lat (msec) : 500=66.67%, 2000=33.33% cpu : usr=0.05%, sys=16.43%, ctx=802, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=158690: Thu Oct 1 14:55:45 2026 write: IOPS=1, BW=6337KiB/s (6489kB/s)(12.0MiB/1939msec); 0 zone resets clat (msec): min=195, max=949, avg=628.38, stdev=389.27 lat (msec): min=195, max=949, avg=628.66, stdev=389.27 clat percentiles (msec): | 1.00th=[ 197], 5.00th=[ 197], 10.00th=[ 197], 20.00th=[ 197], | 30.00th=[ 197], 40.00th=[ 743], 50.00th=[ 743], 60.00th=[ 743], | 70.00th=[ 953], 80.00th=[ 953], 90.00th=[ 953], 95.00th=[ 953], | 99.00th=[ 953], 99.50th=[ 953], 99.90th=[ 953], 99.95th=[ 953], | 99.99th=[ 953] bw ( KiB/s): min= 8000, max= 8000, per=53.37%, avg=8000.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 750=33.33%, 1000=33.33% cpu : usr=0.00%, sys=18.73%, ctx=56, 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=158692: Thu Oct 1 14:55:45 2026 write: IOPS=1, BW=6800KiB/s (6963kB/s)(12.0MiB/1807msec); 0 zone resets clat (msec): min=152, max=1251, avg=583.99, stdev=586.46 lat (msec): min=152, max=1251, avg=584.78, stdev=586.15 clat percentiles (msec): | 1.00th=[ 153], 5.00th=[ 153], 10.00th=[ 153], 20.00th=[ 153], | 30.00th=[ 153], 40.00th=[ 347], 50.00th=[ 347], 60.00th=[ 347], | 70.00th=[ 1250], 80.00th=[ 1250], 90.00th=[ 1250], 95.00th=[ 1250], | 99.00th=[ 1250], 99.50th=[ 1250], 99.90th=[ 1250], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min=11924, max=11924, per=79.55%, avg=11924.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 500=33.33%, 2000=33.33% cpu : usr=0.00%, sys=15.78%, ctx=63, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=7495KiB/s (7675kB/s), 1874KiB/s-8690KiB/s (1919kB/s-8899kB/s), io=16.0MiB (16.8MB), run=1414-2186msec WRITE: bw=14.6MiB/s (15.3MB/s), 3747KiB/s-6800KiB/s (3837kB/s-6963kB/s), io=32.0MiB (33.6MB), run=1807-2186msec rand-rw: (groupid=0, jobs=1): err= 0: pid=158689: Thu Oct 1 14:55:45 2026 read: IOPS=1, BW=7203KiB/s (7376kB/s)(12.0MiB/1706msec) clat (msec): min=445, max=669, avg=553.28, stdev=112.27 lat (msec): min=445, max=669, avg=553.29, stdev=112.27 clat percentiles (msec): | 1.00th=[ 447], 5.00th=[ 447], 10.00th=[ 447], 20.00th=[ 447], | 30.00th=[ 447], 40.00th=[ 542], 50.00th=[ 542], 60.00th=[ 542], | 70.00th=[ 667], 80.00th=[ 667], 90.00th=[ 667], 95.00th=[ 667], | 99.00th=[ 667], 99.50th=[ 667], 99.90th=[ 667], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 5801, max= 8159, per=80.74%, avg=6980.00, stdev=1667.36, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=66.67% cpu : usr=0.00%, sys=18.89%, ctx=77, 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=158691: Thu Oct 1 14:55:45 2026 read: IOPS=0, BW=2161KiB/s (2213kB/s)(4096KiB/1895msec) clat (nsec): min=239470k, max=239470k, avg=239469953.00, stdev= 0.00 lat (nsec): min=239473k, max=239473k, avg=239472600.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 241], 5.00th=[ 241], 10.00th=[ 241], 20.00th=[ 241], | 30.00th=[ 241], 40.00th=[ 241], 50.00th=[ 241], 60.00th=[ 241], | 70.00th=[ 241], 80.00th=[ 241], 90.00th=[ 241], 95.00th=[ 241], | 99.00th=[ 241], 99.50th=[ 241], 99.90th=[ 241], 99.95th=[ 241], | 99.99th=[ 241] bw ( KiB/s): min= 5953, max= 5953, per=68.86%, avg=5953.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=1, BW=4323KiB/s (4427kB/s)(8192KiB/1895msec); 0 zone resets clat (msec): min=583, max=1041, avg=812.77, stdev=323.63 lat (msec): min=584, max=1041, avg=813.12, stdev=323.56 clat percentiles (msec): | 1.00th=[ 584], 5.00th=[ 584], 10.00th=[ 584], 20.00th=[ 584], | 30.00th=[ 584], 40.00th=[ 584], 50.00th=[ 584], 60.00th=[ 1045], | 70.00th=[ 1045], 80.00th=[ 1045], 90.00th=[ 1045], 95.00th=[ 1045], | 99.00th=[ 1045], 99.50th=[ 1045], 99.90th=[ 1045], 99.95th=[ 1045], | 99.99th=[ 1045] bw ( KiB/s): min= 8126, max= 8126, per=53.76%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.11%, sys=14.41%, ctx=84, 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=158693: Thu Oct 1 14:55:45 2026 write: IOPS=1, BW=5668KiB/s (5804kB/s)(12.0MiB/2168msec); 0 zone resets clat (msec): min=144, max=1513, avg=710.89, stdev=714.21 lat (msec): min=144, max=1513, avg=711.15, stdev=714.24 clat percentiles (msec): | 1.00th=[ 144], 5.00th=[ 144], 10.00th=[ 144], 20.00th=[ 144], | 30.00th=[ 144], 40.00th=[ 477], 50.00th=[ 477], 60.00th=[ 477], | 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= 8126, max= 8126, per=53.76%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 500=33.33%, 2000=33.33% cpu : usr=0.00%, sys=12.74%, ctx=48, 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=158694: Thu Oct 1 14:55:45 2026 write: IOPS=1, BW=6187KiB/s (6336kB/s)(12.0MiB/1986msec); 0 zone resets clat (msec): min=467, max=816, avg=637.28, stdev=174.79 lat (msec): min=467, max=817, avg=637.44, stdev=174.79 clat percentiles (msec): | 1.00th=[ 468], 5.00th=[ 468], 10.00th=[ 468], 20.00th=[ 468], | 30.00th=[ 468], 40.00th=[ 625], 50.00th=[ 625], 60.00th=[ 625], | 70.00th=[ 818], 80.00th=[ 818], 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= 8126, max= 8159, per=53.87%, avg=8142.50, stdev=23.33, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=33.33%, 1000=33.33% cpu : usr=0.00%, sys=15.31%, ctx=81, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=8646KiB/s (8853kB/s), 2161KiB/s-7203KiB/s (2213kB/s-7376kB/s), io=16.0MiB (16.8MB), run=1706-1895msec WRITE: bw=14.8MiB/s (15.5MB/s), 4323KiB/s-6187KiB/s (4427kB/s-6336kB/s), io=32.0MiB (33.6MB), run=1895-2168msec