== sanity test 398b: DIO and buffer IO race ============== 18:08:50 (1786831730) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 4.88082 s, 10.3 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=180287: Sat Aug 15 18:10:52 2026 read: IOPS=14, BW=56.5KiB/s (57.9kB/s)(5992KiB/106039msec) clat (usec): min=41, max=290030, avg=38987.20, stdev=26662.37 lat (usec): min=42, max=290031, avg=38992.23, stdev=26664.43 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 10814], 10.00th=[ 14615], 20.00th=[ 19268], | 30.00th=[ 23462], 40.00th=[ 27657], 50.00th=[ 32637], 60.00th=[ 39060], | 70.00th=[ 46400], 80.00th=[ 55837], 90.00th=[ 70779], 95.00th=[ 88605], | 99.00th=[127402], 99.50th=[152044], 99.90th=[217056], 99.95th=[291505], | 99.99th=[291505] bw ( KiB/s): min= 15, max= 120, per=24.93%, avg=56.10, stdev=20.47, samples=208 iops : min= 3, max= 30, avg=13.38, stdev= 5.14, samples=208 write: IOPS=14, BW=59.4KiB/s (60.8kB/s)(6296KiB/106039msec); 0 zone resets clat (usec): min=1060, max=1029.2k, avg=30005.17, stdev=38643.85 lat (usec): min=1061, max=1029.2k, avg=30007.89, stdev=38644.21 clat percentiles (usec): | 1.00th=[ 1254], 5.00th=[ 1483], 10.00th=[ 2311], | 20.00th=[ 4490], 30.00th=[ 8094], 40.00th=[ 14615], | 50.00th=[ 21103], 60.00th=[ 28443], 70.00th=[ 36439], | 80.00th=[ 49546], 90.00th=[ 68682], 95.00th=[ 86508], | 99.00th=[ 135267], 99.50th=[ 156238], 99.90th=[ 204473], | 99.95th=[1027605], 99.99th=[1027605] bw ( KiB/s): min= 15, max= 165, per=25.24%, avg=59.58, stdev=26.15, samples=206 iops : min= 3, max= 41, avg=14.26, stdev= 6.60, samples=206 lat (usec) : 50=0.29%, 100=1.40%, 250=0.13% lat (msec) : 2=4.13%, 4=5.18%, 10=8.20%, 20=16.08%, 50=41.70% lat (msec) : 100=19.66%, 250=3.16%, 500=0.03%, 2000=0.03% cpu : usr=0.08%, sys=6.62%, ctx=6944, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 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=180288: Sat Aug 15 18:10:52 2026 read: IOPS=13, BW=55.9KiB/s (57.2kB/s)(5940KiB/106260msec) clat (usec): min=48, max=1099.6k, avg=39386.54, stdev=37518.64 lat (usec): min=48, max=1099.6k, avg=39387.74, stdev=37518.68 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 10945], 10.00th=[ 15270], | 20.00th=[ 19792], 30.00th=[ 23987], 40.00th=[ 28443], | 50.00th=[ 33424], 60.00th=[ 38536], 70.00th=[ 44827], | 80.00th=[ 53740], 90.00th=[ 70779], 95.00th=[ 84411], | 99.00th=[ 129500], 99.50th=[ 145753], 99.90th=[ 238027], | 99.95th=[1098908], 99.99th=[1098908] bw ( KiB/s): min= 7, max= 127, per=24.88%, avg=55.97, stdev=21.72, samples=208 iops : min= 1, max= 31, avg=13.35, stdev= 5.45, samples=208 write: IOPS=14, BW=59.7KiB/s (61.2kB/s)(6348KiB/106260msec); 0 zone resets clat (usec): min=1129, max=250365, avg=29816.05, stdev=29456.42 lat (usec): min=1130, max=250366, avg=29820.98, stdev=29456.46 clat percentiles (usec): | 1.00th=[ 1270], 5.00th=[ 1434], 10.00th=[ 2147], 20.00th=[ 4047], | 30.00th=[ 7767], 40.00th=[ 16057], 50.00th=[ 22414], 60.00th=[ 29754], | 70.00th=[ 38011], 80.00th=[ 49546], 90.00th=[ 68682], 95.00th=[ 86508], | 99.00th=[129500], 99.50th=[158335], 99.90th=[212861], 99.95th=[250610], | 99.99th=[250610] bw ( KiB/s): min= 7, max= 183, per=25.36%, avg=59.86, stdev=26.90, samples=208 iops : min= 1, max= 45, avg=14.32, stdev= 6.75, samples=208 lat (usec) : 50=0.10%, 100=1.27%, 250=0.23%, 500=0.10% lat (msec) : 2=4.72%, 4=5.53%, 10=7.39%, 20=14.16%, 50=45.08% lat (msec) : 100=18.39%, 250=2.96%, 500=0.03%, 2000=0.03% cpu : usr=0.08%, sys=6.65%, ctx=6872, 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=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=180289: Sat Aug 15 18:10:52 2026 read: IOPS=14, BW=57.3KiB/s (58.7kB/s)(6028KiB/105230msec) clat (usec): min=39, max=211391, avg=37948.90, stdev=25492.02 lat (usec): min=39, max=211392, avg=37950.56, stdev=25491.81 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 9503], 10.00th=[ 14353], 20.00th=[ 18744], | 30.00th=[ 22938], 40.00th=[ 27132], 50.00th=[ 32375], 60.00th=[ 38536], | 70.00th=[ 44827], 80.00th=[ 55313], 90.00th=[ 70779], 95.00th=[ 83362], | 99.00th=[133694], 99.50th=[160433], 99.90th=[185598], 99.95th=[210764], | 99.99th=[210764] bw ( KiB/s): min= 7, max= 111, per=25.52%, avg=57.42, stdev=20.23, samples=206 iops : min= 1, max= 27, avg=13.71, stdev= 5.07, samples=206 write: IOPS=14, BW=59.5KiB/s (60.9kB/s)(6260KiB/105230msec); 0 zone resets clat (usec): min=1162, max=1092.7k, avg=30436.51, stdev=40062.92 lat (usec): min=1164, max=1092.7k, avg=30439.48, stdev=40063.20 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1418], 10.00th=[ 2147], | 20.00th=[ 4178], 30.00th=[ 7373], 40.00th=[ 14877], | 50.00th=[ 21627], 60.00th=[ 29230], 70.00th=[ 38011], | 80.00th=[ 51643], 90.00th=[ 68682], 95.00th=[ 84411], | 99.00th=[ 135267], 99.50th=[ 156238], 99.90th=[ 244319], | 99.95th=[1098908], 99.99th=[1098908] bw ( KiB/s): min= 5, max= 134, per=25.15%, avg=59.34, stdev=26.24, samples=207 iops : min= 1, max= 33, avg=14.20, stdev= 6.60, samples=207 lat (usec) : 50=0.26%, 100=1.50%, 250=0.23%, 500=0.03%, 750=0.03% lat (msec) : 2=4.69%, 4=5.01%, 10=8.20%, 20=15.56%, 50=41.99% lat (msec) : 100=19.92%, 250=2.54%, 2000=0.03% cpu : usr=0.08%, sys=6.68%, ctx=6917, 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=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=180290: Sat Aug 15 18:10:52 2026 read: IOPS=14, BW=57.5KiB/s (58.9kB/s)(6052KiB/105235msec) clat (usec): min=44, max=217482, avg=37678.02, stdev=25071.24 lat (usec): min=45, max=217484, avg=37679.04, stdev=25071.23 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 7308], 10.00th=[ 14484], 20.00th=[ 18744], | 30.00th=[ 23725], 40.00th=[ 27657], 50.00th=[ 32113], 60.00th=[ 38536], | 70.00th=[ 44827], 80.00th=[ 53740], 90.00th=[ 67634], 95.00th=[ 83362], | 99.00th=[128451], 99.50th=[143655], 99.90th=[210764], 99.95th=[217056], | 99.99th=[217056] bw ( KiB/s): min= 7, max= 111, per=25.75%, avg=57.95, stdev=20.76, samples=205 iops : min= 1, max= 27, avg=13.84, stdev= 5.21, samples=205 write: IOPS=14, BW=59.3KiB/s (60.7kB/s)(6236KiB/105235msec); 0 zone resets clat (usec): min=1063, max=1103.5k, avg=30647.09, stdev=41604.39 lat (usec): min=1064, max=1103.5k, avg=30648.45, stdev=41604.40 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1401], 10.00th=[ 2147], | 20.00th=[ 4047], 30.00th=[ 6980], 40.00th=[ 14091], | 50.00th=[ 21103], 60.00th=[ 28967], 70.00th=[ 37487], | 80.00th=[ 50070], 90.00th=[ 69731], 95.00th=[ 91751], | 99.00th=[ 152044], 99.50th=[ 189793], 99.90th=[ 231736], | 99.95th=[1098908], 99.99th=[1098908] bw ( KiB/s): min= 7, max= 119, per=25.17%, avg=59.40, stdev=23.37, samples=206 iops : min= 1, max= 29, avg=14.21, stdev= 5.86, samples=206 lat (usec) : 50=0.33%, 100=1.46%, 250=0.39%, 500=0.13% lat (msec) : 2=4.79%, 4=5.31%, 10=8.24%, 20=14.78%, 50=42.87% lat (msec) : 100=18.78%, 250=2.90%, 2000=0.03% cpu : usr=0.06%, sys=6.61%, ctx=6926, 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=226KiB/s (231kB/s), 55.9KiB/s-57.5KiB/s (57.2kB/s-58.9kB/s), io=23.4MiB (24.6MB), run=105230-106260msec WRITE: bw=237KiB/s (242kB/s), 59.3KiB/s-59.7KiB/s (60.7kB/s-61.2kB/s), io=24.6MiB (25.7MB), run=105230-106260msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180291: Sat Aug 15 18:11:21 2026 read: IOPS=11, BW=44.8KiB/s (45.9kB/s)(5992KiB/133746msec) clat (msec): min=5, max=1155, avg=34.87, stdev=42.51 lat (msec): min=5, max=1155, avg=34.88, stdev=42.51 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 37], 80.00th=[ 52], 90.00th=[ 79], 95.00th=[ 101], | 99.00th=[ 157], 99.50th=[ 182], 99.90th=[ 271], 99.95th=[ 1150], | 99.99th=[ 1150] bw ( KiB/s): min= 7, max= 173, per=25.50%, avg=45.13, stdev=32.23, samples=259 iops : min= 1, max= 43, avg=10.64, stdev= 8.08, samples=259 write: IOPS=11, BW=47.1KiB/s (48.2kB/s)(6296KiB/133746msec); 0 zone resets clat (msec): min=10, max=355, avg=51.57, stdev=38.58 lat (msec): min=10, max=355, avg=51.57, stdev=38.57 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 17], 10.00th=[ 19], 20.00th=[ 23], | 30.00th=[ 27], 40.00th=[ 33], 50.00th=[ 40], 60.00th=[ 49], | 70.00th=[ 61], 80.00th=[ 74], 90.00th=[ 101], 95.00th=[ 125], | 99.00th=[ 186], 99.50th=[ 247], 99.90th=[ 321], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 7, max= 143, per=25.45%, avg=47.08, stdev=30.69, samples=261 iops : min= 1, max= 35, avg=11.13, stdev= 7.67, samples=261 lat (msec) : 10=4.72%, 20=23.76%, 50=41.60%, 100=22.46%, 250=7.16% lat (msec) : 500=0.26%, 2000=0.03% cpu : usr=0.05%, sys=2.73%, ctx=5041, 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=180292: Sat Aug 15 18:11:21 2026 read: IOPS=11, BW=44.0KiB/s (45.1kB/s)(5940KiB/134880msec) clat (msec): min=4, max=1111, avg=34.82, stdev=41.99 lat (msec): min=4, max=1111, avg=34.82, stdev=41.99 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 37], 80.00th=[ 51], 90.00th=[ 77], 95.00th=[ 100], | 99.00th=[ 148], 99.50th=[ 182], 99.90th=[ 243], 99.95th=[ 1116], | 99.99th=[ 1116] bw ( KiB/s): min= 7, max= 152, per=25.25%, avg=44.70, stdev=31.87, samples=260 iops : min= 1, max= 38, avg=10.54, stdev= 8.01, samples=260 write: IOPS=11, BW=47.1KiB/s (48.2kB/s)(6348KiB/134880msec); 0 zone resets clat (msec): min=10, max=350, avg=52.18, stdev=38.75 lat (msec): min=10, max=350, avg=52.18, stdev=38.75 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 17], 10.00th=[ 19], 20.00th=[ 23], | 30.00th=[ 27], 40.00th=[ 33], 50.00th=[ 40], 60.00th=[ 50], | 70.00th=[ 62], 80.00th=[ 79], 90.00th=[ 104], 95.00th=[ 123], | 99.00th=[ 184], 99.50th=[ 226], 99.90th=[ 326], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 7, max= 135, per=25.33%, avg=46.86, stdev=30.50, samples=265 iops : min= 1, max= 33, avg=11.09, stdev= 7.67, samples=265 lat (msec) : 10=4.59%, 20=23.57%, 50=42.32%, 100=21.71%, 250=7.62% lat (msec) : 500=0.16%, 2000=0.03% cpu : usr=0.06%, sys=2.63%, ctx=5036, 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=180293: Sat Aug 15 18:11:21 2026 read: IOPS=11, BW=44.5KiB/s (45.6kB/s)(6028KiB/135320msec) clat (msec): min=5, max=312, avg=35.17, stdev=34.39 lat (msec): min=5, max=312, avg=35.17, stdev=34.39 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 19], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 36], 80.00th=[ 52], 90.00th=[ 75], 95.00th=[ 110], | 99.00th=[ 159], 99.50th=[ 207], 99.90th=[ 275], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 7, max= 183, per=25.45%, avg=45.05, stdev=31.87, samples=262 iops : min= 1, max= 45, avg=10.63, stdev= 8.01, samples=262 write: IOPS=11, BW=46.3KiB/s (47.4kB/s)(6260KiB/135320msec); 0 zone resets clat (msec): min=9, max=1072, avg=52.34, stdev=48.43 lat (msec): min=9, max=1072, avg=52.34, stdev=48.43 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 17], 10.00th=[ 19], 20.00th=[ 22], | 30.00th=[ 26], 40.00th=[ 31], 50.00th=[ 38], 60.00th=[ 48], | 70.00th=[ 60], 80.00th=[ 77], 90.00th=[ 103], 95.00th=[ 127], | 99.00th=[ 211], 99.50th=[ 284], 99.90th=[ 359], 99.95th=[ 1070], | 99.99th=[ 1070] bw ( KiB/s): min= 7, max= 144, per=25.37%, avg=46.93, stdev=31.84, samples=261 iops : min= 1, max= 36, avg=11.10, stdev= 8.01, samples=261 lat (msec) : 10=4.36%, 20=23.96%, 50=42.25%, 100=20.93%, 250=8.07% lat (msec) : 500=0.39%, 2000=0.03% cpu : usr=0.05%, sys=2.63%, ctx=5062, 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=180294: Sat Aug 15 18:11:21 2026 read: IOPS=11, BW=44.8KiB/s (45.9kB/s)(6052KiB/135065msec) clat (msec): min=4, max=307, avg=36.09, stdev=35.15 lat (msec): min=4, max=307, avg=36.09, stdev=35.15 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 29], | 70.00th=[ 39], 80.00th=[ 53], 90.00th=[ 80], 95.00th=[ 108], | 99.00th=[ 165], 99.50th=[ 218], 99.90th=[ 262], 99.95th=[ 309], | 99.99th=[ 309] bw ( KiB/s): min= 7, max= 191, per=25.51%, avg=45.16, stdev=32.44, samples=261 iops : min= 1, max= 47, avg=10.66, stdev= 8.15, samples=261 write: IOPS=11, BW=46.2KiB/s (47.3kB/s)(6236KiB/135065msec); 0 zone resets clat (msec): min=11, max=1097, avg=51.37, stdev=46.05 lat (msec): min=11, max=1097, avg=51.38, stdev=46.05 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 17], 10.00th=[ 18], 20.00th=[ 22], | 30.00th=[ 26], 40.00th=[ 31], 50.00th=[ 37], 60.00th=[ 48], | 70.00th=[ 62], 80.00th=[ 77], 90.00th=[ 101], 95.00th=[ 125], | 99.00th=[ 184], 99.50th=[ 220], 99.90th=[ 309], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 7, max= 143, per=25.16%, avg=46.54, stdev=31.37, samples=261 iops : min= 1, max= 35, avg=11.00, stdev= 7.89, samples=261 lat (msec) : 10=4.98%, 20=23.24%, 50=41.67%, 100=22.17%, 250=7.71% lat (msec) : 500=0.20%, 2000=0.03% cpu : usr=0.05%, sys=2.65%, ctx=4989, 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=177KiB/s (182kB/s), 44.0KiB/s-44.8KiB/s (45.1kB/s-45.9kB/s), io=23.4MiB (24.6MB), run=133746-135320msec WRITE: bw=186KiB/s (190kB/s), 46.2KiB/s-47.1KiB/s (47.3kB/s-48.2kB/s), io=24.6MiB (25.7MB), run=133746-135320msec 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=180336: Sat Aug 15 18:12:01 2026 read: IOPS=13, BW=212KiB/s (218kB/s)(5920KiB/27871msec) clat (usec): min=41, max=186176, avg=39989.76, stdev=27736.63 lat (usec): min=41, max=186177, avg=39991.71, stdev=27735.51 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 68], 10.00th=[ 11994], 20.00th=[ 20317], | 30.00th=[ 26346], 40.00th=[ 30278], 50.00th=[ 35914], 60.00th=[ 41157], | 70.00th=[ 48497], 80.00th=[ 56361], 90.00th=[ 69731], 95.00th=[ 80217], | 99.00th=[162530], 99.50th=[183501], 99.90th=[185598], 99.95th=[185598], | 99.99th=[185598] bw ( KiB/s): min= 93, max= 411, per=24.85%, avg=209.28, stdev=71.36, samples=54 iops : min= 5, max= 25, avg=12.28, stdev= 4.51, samples=54 write: IOPS=14, BW=228KiB/s (234kB/s)(6368KiB/27871msec); 0 zone resets clat (usec): min=1606, max=136696, avg=32177.00, stdev=28707.55 lat (usec): min=1607, max=136699, avg=32178.95, stdev=28707.48 clat percentiles (usec): | 1.00th=[ 1827], 5.00th=[ 2671], 10.00th=[ 4047], 20.00th=[ 6783], | 30.00th=[ 11863], 40.00th=[ 17957], 50.00th=[ 24249], 60.00th=[ 31327], | 70.00th=[ 41157], 80.00th=[ 54264], 90.00th=[ 72877], 95.00th=[ 92799], | 99.00th=[127402], 99.50th=[132645], 99.90th=[137364], 99.95th=[137364], | 99.99th=[137364] bw ( KiB/s): min= 31, max= 447, per=25.79%, avg=228.52, stdev=82.36, samples=54 iops : min= 1, max= 27, avg=13.50, stdev= 5.16, samples=54 lat (usec) : 50=0.39%, 100=2.99%, 250=0.65%, 750=0.13% lat (msec) : 2=1.17%, 4=3.78%, 10=9.51%, 20=13.28%, 50=43.10% lat (msec) : 100=21.61%, 250=3.39% cpu : usr=0.05%, sys=7.52%, ctx=1850, 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=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=180337: Sat Aug 15 18:12:01 2026 read: IOPS=12, BW=205KiB/s (210kB/s)(5744KiB/28058msec) clat (usec): min=52, max=274885, avg=40958.81, stdev=28960.95 lat (usec): min=53, max=274887, avg=40961.93, stdev=28960.21 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 67], 10.00th=[ 17171], 20.00th=[ 22414], | 30.00th=[ 26870], 40.00th=[ 32113], 50.00th=[ 36439], 60.00th=[ 41157], | 70.00th=[ 46924], 80.00th=[ 55837], 90.00th=[ 73925], 95.00th=[ 84411], | 99.00th=[126354], 99.50th=[248513], 99.90th=[274727], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 31, max= 382, per=24.31%, avg=204.65, stdev=78.16, samples=55 iops : min= 1, max= 23, avg=11.98, stdev= 4.91, samples=55 write: IOPS=14, BW=233KiB/s (239kB/s)(6544KiB/28058msec); 0 zone resets clat (usec): min=1543, max=185475, avg=32300.66, stdev=29079.71 lat (usec): min=1544, max=185477, avg=32304.65, stdev=29079.94 clat percentiles (usec): | 1.00th=[ 1827], 5.00th=[ 2343], 10.00th=[ 3359], 20.00th=[ 5997], | 30.00th=[ 10421], 40.00th=[ 17695], 50.00th=[ 25822], 60.00th=[ 35390], | 70.00th=[ 42730], 80.00th=[ 54264], 90.00th=[ 69731], 95.00th=[ 85459], | 99.00th=[125305], 99.50th=[137364], 99.90th=[185598], 99.95th=[185598], | 99.99th=[185598] bw ( KiB/s): min= 62, max= 510, per=26.30%, avg=233.04, stdev=96.26, samples=55 iops : min= 3, max= 31, avg=13.78, stdev= 6.06, samples=55 lat (usec) : 100=3.12%, 250=0.52% lat (msec) : 2=1.69%, 4=4.69%, 10=9.24%, 20=10.68%, 50=45.70% lat (msec) : 100=20.96%, 250=3.26%, 500=0.13% cpu : usr=0.08%, sys=7.19%, ctx=1817, 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=180338: Sat Aug 15 18:12:01 2026 read: IOPS=13, BW=220KiB/s (225kB/s)(6256KiB/28433msec) clat (usec): min=27, max=192691, avg=40193.10, stdev=28471.73 lat (usec): min=28, max=192691, avg=40194.27, stdev=28471.76 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 70], 10.00th=[ 13829], 20.00th=[ 21627], | 30.00th=[ 25822], 40.00th=[ 29754], 50.00th=[ 34866], 60.00th=[ 40109], | 70.00th=[ 47973], 80.00th=[ 55313], 90.00th=[ 72877], 95.00th=[ 86508], | 99.00th=[168821], 99.50th=[187696], 99.90th=[191890], 99.95th=[191890], | 99.99th=[191890] bw ( KiB/s): min= 63, max= 479, per=25.98%, avg=218.76, stdev=89.97, samples=55 iops : min= 3, max= 29, avg=12.87, stdev= 5.66, samples=55 write: IOPS=13, BW=212KiB/s (217kB/s)(6032KiB/28433msec); 0 zone resets clat (usec): min=1839, max=224198, avg=32959.53, stdev=29849.24 lat (usec): min=1841, max=224200, avg=32961.73, stdev=29849.23 clat percentiles (usec): | 1.00th=[ 1991], 5.00th=[ 2966], 10.00th=[ 3916], 20.00th=[ 7373], | 30.00th=[ 11994], 40.00th=[ 19006], 50.00th=[ 25297], 60.00th=[ 32637], | 70.00th=[ 43779], 80.00th=[ 55313], 90.00th=[ 71828], 95.00th=[ 87557], | 99.00th=[113771], 99.50th=[208667], 99.90th=[223347], 99.95th=[223347], | 99.99th=[223347] bw ( KiB/s): min= 63, max= 411, per=23.46%, avg=207.82, stdev=88.27, samples=55 iops : min= 3, max= 25, avg=12.18, stdev= 5.59, samples=55 lat (usec) : 50=0.78%, 100=2.60%, 250=0.65%, 750=0.13% lat (msec) : 2=0.52%, 4=4.43%, 10=8.20%, 20=12.24%, 50=44.01% lat (msec) : 100=23.31%, 250=3.12% cpu : usr=0.06%, sys=7.11%, ctx=1842, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180339: Sat Aug 15 18:12:01 2026 read: IOPS=13, BW=220KiB/s (225kB/s)(6032KiB/27399msec) clat (usec): min=40, max=216306, avg=37728.62, stdev=25736.12 lat (usec): min=41, max=216307, avg=37731.09, stdev=25734.57 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 63], 10.00th=[ 1188], 20.00th=[ 20317], | 30.00th=[ 25822], 40.00th=[ 28967], 50.00th=[ 34341], 60.00th=[ 38011], | 70.00th=[ 44303], 80.00th=[ 53740], 90.00th=[ 67634], 95.00th=[ 83362], | 99.00th=[119014], 99.50th=[145753], 99.90th=[217056], 99.95th=[217056], | 99.99th=[217056] bw ( KiB/s): min= 64, max= 479, per=25.84%, avg=217.55, stdev=90.78, samples=53 iops : min= 4, max= 29, avg=12.81, stdev= 5.65, samples=53 write: IOPS=14, BW=228KiB/s (234kB/s)(6256KiB/27399msec); 0 zone resets clat (usec): min=1718, max=249627, avg=32883.98, stdev=30499.65 lat (usec): min=1719, max=249629, avg=32904.03, stdev=30492.66 clat percentiles (usec): | 1.00th=[ 1827], 5.00th=[ 2638], 10.00th=[ 3851], 20.00th=[ 6980], | 30.00th=[ 12387], 40.00th=[ 18482], 50.00th=[ 25560], 60.00th=[ 32113], | 70.00th=[ 41681], 80.00th=[ 55313], 90.00th=[ 73925], 95.00th=[ 88605], | 99.00th=[127402], 99.50th=[210764], 99.90th=[250610], 99.95th=[250610], | 99.99th=[250610] bw ( KiB/s): min= 91, max= 447, per=25.64%, avg=227.13, stdev=79.69, samples=53 iops : min= 5, max= 27, avg=13.40, stdev= 5.05, samples=53 lat (usec) : 50=0.39%, 100=3.78%, 250=0.39%, 500=0.13%, 750=0.13% lat (msec) : 2=1.17%, 4=4.56%, 10=8.07%, 20=12.50%, 50=44.79% lat (msec) : 100=21.74%, 250=2.34% cpu : usr=0.07%, sys=7.36%, ctx=1842, 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=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=842KiB/s (863kB/s), 205KiB/s-220KiB/s (210kB/s-225kB/s), io=23.4MiB (24.5MB), run=27399-28433msec WRITE: bw=886KiB/s (908kB/s), 212KiB/s-233KiB/s (217kB/s-239kB/s), io=24.6MiB (25.8MB), run=27399-28433msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180332: Sat Aug 15 18:12:09 2026 read: IOPS=10, BW=162KiB/s (166kB/s)(5920KiB/36504msec) clat (msec): min=6, max=194, avg=38.86, stdev=32.00 lat (msec): min=6, max=194, avg=38.86, stdev=32.00 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 32], | 70.00th=[ 41], 80.00th=[ 63], 90.00th=[ 91], 95.00th=[ 107], | 99.00th=[ 136], 99.50th=[ 190], 99.90th=[ 194], 99.95th=[ 194], | 99.99th=[ 194] bw ( KiB/s): min= 31, max= 510, per=24.70%, avg=160.53, stdev=104.67, samples=72 iops : min= 1, max= 31, avg= 9.26, stdev= 6.59, samples=72 write: IOPS=10, BW=174KiB/s (179kB/s)(6368KiB/36504msec); 0 zone resets clat (msec): min=11, max=325, avg=55.43, stdev=40.09 lat (msec): min=11, max=325, avg=55.44, stdev=40.09 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 18], 10.00th=[ 21], 20.00th=[ 26], | 30.00th=[ 31], 40.00th=[ 36], 50.00th=[ 42], 60.00th=[ 50], | 70.00th=[ 65], 80.00th=[ 82], 90.00th=[ 108], 95.00th=[ 140], | 99.00th=[ 194], 99.50th=[ 209], 99.90th=[ 326], 99.95th=[ 326], | 99.99th=[ 326] bw ( KiB/s): min= 31, max= 510, per=25.71%, avg=175.87, stdev=102.41, samples=71 iops : min= 1, max= 31, avg=10.23, stdev= 6.43, samples=71 lat (msec) : 10=2.08%, 20=18.88%, 50=46.61%, 100=21.88%, 250=10.42% lat (msec) : 500=0.13% cpu : usr=0.08%, sys=2.86%, ctx=1259, 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=180333: Sat Aug 15 18:12:09 2026 read: IOPS=9, BW=156KiB/s (160kB/s)(5744KiB/36836msec) clat (msec): min=7, max=191, avg=36.88, stdev=32.12 lat (msec): min=7, max=191, avg=36.88, stdev=32.12 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 25], 60.00th=[ 30], | 70.00th=[ 35], 80.00th=[ 53], 90.00th=[ 84], 95.00th=[ 113], | 99.00th=[ 159], 99.50th=[ 188], 99.90th=[ 192], 99.95th=[ 192], | 99.99th=[ 192] bw ( KiB/s): min= 30, max= 507, per=25.36%, avg=164.83, stdev=101.90, samples=69 iops : min= 1, max= 31, avg= 9.52, stdev= 6.38, samples=69 write: IOPS=11, BW=178KiB/s (182kB/s)(6544KiB/36836msec); 0 zone resets clat (msec): min=12, max=322, avg=57.36, stdev=40.40 lat (msec): min=13, max=322, avg=57.36, stdev=40.40 clat percentiles (msec): | 1.00th=[ 15], 5.00th=[ 19], 10.00th=[ 22], 20.00th=[ 27], | 30.00th=[ 31], 40.00th=[ 37], 50.00th=[ 44], 60.00th=[ 52], | 70.00th=[ 68], 80.00th=[ 89], 90.00th=[ 114], 95.00th=[ 138], | 99.00th=[ 186], 99.50th=[ 192], 99.90th=[ 321], 99.95th=[ 321], | 99.99th=[ 321] bw ( KiB/s): min= 63, max= 574, per=25.84%, avg=176.77, stdev=107.72, samples=73 iops : min= 3, max= 35, avg=10.27, stdev= 6.77, samples=73 lat (msec) : 10=1.95%, 20=19.14%, 50=47.01%, 100=20.83%, 250=10.94% lat (msec) : 500=0.13% cpu : usr=0.07%, sys=2.63%, ctx=1249, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180334: Sat Aug 15 18:12:09 2026 read: IOPS=10, BW=171KiB/s (175kB/s)(6256KiB/36609msec) clat (msec): min=6, max=202, avg=37.68, stdev=30.70 lat (msec): min=6, max=202, avg=37.68, stdev=30.70 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 23], 50.00th=[ 26], 60.00th=[ 33], | 70.00th=[ 42], 80.00th=[ 56], 90.00th=[ 87], 95.00th=[ 109], | 99.00th=[ 140], 99.50th=[ 174], 99.90th=[ 203], 99.95th=[ 203], | 99.99th=[ 203] bw ( KiB/s): min= 31, max= 507, per=26.13%, avg=169.88, stdev=118.59, samples=72 iops : min= 1, max= 31, avg= 9.85, stdev= 7.42, samples=72 write: IOPS=10, BW=165KiB/s (169kB/s)(6032KiB/36609msec); 0 zone resets clat (msec): min=11, max=221, avg=57.46, stdev=37.86 lat (msec): min=11, max=221, avg=57.46, stdev=37.85 clat percentiles (msec): | 1.00th=[ 14], 5.00th=[ 19], 10.00th=[ 21], 20.00th=[ 26], | 30.00th=[ 32], 40.00th=[ 38], 50.00th=[ 46], 60.00th=[ 58], | 70.00th=[ 69], 80.00th=[ 88], 90.00th=[ 109], 95.00th=[ 136], | 99.00th=[ 188], 99.50th=[ 209], 99.90th=[ 222], 99.95th=[ 222], | 99.99th=[ 222] bw ( KiB/s): min= 31, max= 447, per=23.62%, avg=161.56, stdev=92.39, samples=72 iops : min= 1, max= 27, avg= 9.32, stdev= 5.82, samples=72 lat (msec) : 10=2.34%, 20=18.75%, 50=44.66%, 100=24.35%, 250=9.90% cpu : usr=0.05%, sys=2.82%, ctx=1306, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180335: Sat Aug 15 18:12:09 2026 read: IOPS=10, BW=165KiB/s (169kB/s)(6032KiB/36598msec) clat (msec): min=7, max=221, avg=40.51, stdev=35.22 lat (msec): min=7, max=221, avg=40.51, stdev=35.22 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 35], | 70.00th=[ 45], 80.00th=[ 58], 90.00th=[ 100], 95.00th=[ 121], | 99.00th=[ 153], 99.50th=[ 190], 99.90th=[ 222], 99.95th=[ 222], | 99.99th=[ 222] bw ( KiB/s): min= 31, max= 542, per=25.34%, avg=164.69, stdev=109.79, samples=71 iops : min= 1, max= 33, avg= 9.54, stdev= 6.89, samples=71 write: IOPS=10, BW=171KiB/s (175kB/s)(6256KiB/36598msec); 0 zone resets clat (msec): min=14, max=240, avg=54.08, stdev=36.76 lat (msec): min=14, max=240, avg=54.09, stdev=36.76 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 20], 10.00th=[ 22], 20.00th=[ 25], | 30.00th=[ 29], 40.00th=[ 34], 50.00th=[ 41], 60.00th=[ 49], | 70.00th=[ 63], 80.00th=[ 84], 90.00th=[ 104], 95.00th=[ 129], | 99.00th=[ 182], 99.50th=[ 192], 99.90th=[ 241], 99.95th=[ 241], | 99.99th=[ 241] bw ( KiB/s): min= 31, max= 506, per=24.79%, avg=169.57, stdev=105.70, samples=72 iops : min= 1, max= 31, avg= 9.83, stdev= 6.66, samples=72 lat (msec) : 10=2.47%, 20=17.84%, 50=47.40%, 100=21.48%, 250=10.81% cpu : usr=0.05%, sys=2.75%, ctx=1251, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=650KiB/s (666kB/s), 156KiB/s-171KiB/s (160kB/s-175kB/s), io=23.4MiB (24.5MB), run=36504-36836msec WRITE: bw=684KiB/s (701kB/s), 165KiB/s-178KiB/s (169kB/s-182kB/s), io=24.6MiB (25.8MB), run=36504-36836msec 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=180349: Sat Aug 15 18:12:20 2026 read: IOPS=2, BW=2798KiB/s (2865kB/s)(7168KiB/2562msec) clat (usec): min=551, max=172670, avg=125432.06, stdev=59149.83 lat (usec): min=552, max=172672, avg=125433.45, stdev=59149.92 clat percentiles (usec): | 1.00th=[ 553], 5.00th=[ 553], 10.00th=[ 553], 20.00th=[104334], | 30.00th=[141558], 40.00th=[141558], 50.00th=[145753], 60.00th=[152044], | 70.00th=[152044], 80.00th=[162530], 90.00th=[173016], 95.00th=[173016], | 99.00th=[173016], 99.50th=[173016], 99.90th=[173016], 99.95th=[173016], | 99.99th=[173016] bw ( KiB/s): min= 2007, max= 5370, per=65.06%, avg=3821.33, stdev=1697.17, samples=3 iops : min= 1, max= 5, avg= 3.00, stdev= 2.00, samples=3 write: IOPS=1, BW=1998KiB/s (2046kB/s)(5120KiB/2562msec); 0 zone resets clat (msec): min=236, max=461, avg=329.48, stdev=93.73 lat (msec): min=236, max=461, avg=329.55, stdev=93.71 clat percentiles (msec): | 1.00th=[ 236], 5.00th=[ 236], 10.00th=[ 236], 20.00th=[ 236], | 30.00th=[ 255], 40.00th=[ 255], 50.00th=[ 309], 60.00th=[ 309], | 70.00th=[ 384], 80.00th=[ 384], 90.00th=[ 464], 95.00th=[ 464], | 99.00th=[ 464], 99.50th=[ 464], 99.90th=[ 464], 99.95th=[ 464], | 99.99th=[ 464] bw ( KiB/s): min= 1950, max= 4015, per=32.46%, avg=2669.33, stdev=1166.31, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=8.33% lat (msec) : 250=58.33%, 500=33.33% cpu : usr=0.04%, sys=34.05%, ctx=267, 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=180350: Sat Aug 15 18:12:20 2026 read: IOPS=0, BW=614KiB/s (629kB/s)(2048KiB/3334msec) clat (msec): min=178, max=425, avg=301.59, stdev=174.66 lat (msec): min=178, max=425, avg=301.59, stdev=174.66 clat percentiles (msec): | 1.00th=[ 178], 5.00th=[ 178], 10.00th=[ 178], 20.00th=[ 178], | 30.00th=[ 178], 40.00th=[ 178], 50.00th=[ 178], 60.00th=[ 426], | 70.00th=[ 426], 80.00th=[ 426], 90.00th=[ 426], 95.00th=[ 426], | 99.00th=[ 426], 99.50th=[ 426], 99.90th=[ 426], 99.95th=[ 426], | 99.99th=[ 426] bw ( KiB/s): min= 1822, max= 1996, per=32.50%, avg=1909.00, stdev=123.04, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=3071KiB/s (3145kB/s)(10.0MiB/3334msec); 0 zone resets clat (msec): min=101, max=463, avg=265.16, stdev=123.91 lat (msec): min=101, max=463, avg=265.26, stdev=123.92 clat percentiles (msec): | 1.00th=[ 102], 5.00th=[ 102], 10.00th=[ 102], 20.00th=[ 148], | 30.00th=[ 161], 40.00th=[ 192], 50.00th=[ 245], 60.00th=[ 257], | 70.00th=[ 309], 80.00th=[ 321], 90.00th=[ 456], 95.00th=[ 464], | 99.00th=[ 464], 99.50th=[ 464], 99.90th=[ 464], 99.95th=[ 464], | 99.99th=[ 464] bw ( KiB/s): min= 1950, max= 6083, per=44.09%, avg=3626.20, stdev=1722.39, samples=5 iops : min= 1, max= 5, avg= 2.60, stdev= 1.67, samples=5 lat (msec) : 250=50.00%, 500=50.00% cpu : usr=0.00%, sys=30.57%, ctx=239, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180351: Sat Aug 15 18:12:20 2026 read: IOPS=1, BW=1762KiB/s (1805kB/s)(6144KiB/3486msec) clat (usec): min=658, max=624186, avg=217578.52, stdev=217238.50 lat (usec): min=659, max=624187, avg=217579.54, stdev=217238.48 clat percentiles (usec): | 1.00th=[ 660], 5.00th=[ 660], 10.00th=[ 660], 20.00th=[ 74974], | 30.00th=[ 74974], 40.00th=[166724], 50.00th=[166724], 60.00th=[202376], | 70.00th=[238027], 80.00th=[238027], 90.00th=[624952], 95.00th=[624952], | 99.00th=[624952], 99.50th=[624952], 99.90th=[624952], 99.95th=[624952], | 99.99th=[624952] bw ( KiB/s): min= 1950, max= 2043, per=34.13%, avg=2004.60, stdev=35.49, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 write: IOPS=1, BW=1762KiB/s (1805kB/s)(6144KiB/3486msec); 0 zone resets clat (msec): min=198, max=525, avg=347.23, stdev=122.99 lat (msec): min=198, max=525, avg=347.30, stdev=122.98 clat percentiles (msec): | 1.00th=[ 199], 5.00th=[ 199], 10.00th=[ 199], 20.00th=[ 271], | 30.00th=[ 271], 40.00th=[ 296], 50.00th=[ 296], 60.00th=[ 338], | 70.00th=[ 460], 80.00th=[ 460], 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= 1828, max= 4087, per=30.07%, avg=2473.00, stdev=1079.11, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (usec) : 750=8.33% lat (msec) : 100=8.33%, 250=33.33%, 500=33.33%, 750=16.67% cpu : usr=0.00%, sys=20.63%, ctx=153, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180352: Sat Aug 15 18:12:20 2026 read: IOPS=1, BW=1880KiB/s (1925kB/s)(5120KiB/2723msec) clat (usec): min=989, max=214715, avg=148556.94, stdev=87263.96 lat (usec): min=990, max=214716, avg=148582.23, stdev=87285.47 clat percentiles (usec): | 1.00th=[ 988], 5.00th=[ 988], 10.00th=[ 988], 20.00th=[ 988], | 30.00th=[147850], 40.00th=[147850], 50.00th=[168821], 60.00th=[168821], | 70.00th=[210764], 80.00th=[210764], 90.00th=[214959], 95.00th=[214959], | 99.00th=[214959], 99.50th=[214959], 99.90th=[214959], 99.95th=[214959], | 99.99th=[214959] bw ( KiB/s): min= 2007, max= 5851, per=66.89%, avg=3929.00, stdev=2718.12, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=2, BW=2632KiB/s (2696kB/s)(7168KiB/2723msec); 0 zone resets clat (msec): min=99, max=546, avg=278.01, stdev=147.95 lat (msec): min=99, max=546, avg=278.10, stdev=147.95 clat percentiles (msec): | 1.00th=[ 101], 5.00th=[ 101], 10.00th=[ 101], 20.00th=[ 176], | 30.00th=[ 201], 40.00th=[ 201], 50.00th=[ 234], 60.00th=[ 347], | 70.00th=[ 347], 80.00th=[ 347], 90.00th=[ 550], 95.00th=[ 550], | 99.00th=[ 550], 99.50th=[ 550], 99.90th=[ 550], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 1914, max= 4087, per=33.93%, avg=2790.00, stdev=1141.61, samples=5 iops : min= 1, max= 3, avg= 1.80, stdev= 1.10, samples=5 lat (usec) : 1000=8.33% lat (msec) : 100=8.33%, 250=58.33%, 500=16.67%, 750=8.33% cpu : usr=0.00%, sys=33.32%, ctx=167, 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=5875KiB/s (6016kB/s), 614KiB/s-2798KiB/s (629kB/s-2865kB/s), io=20.0MiB (20.0MB), run=2562-3486msec WRITE: bw=8225KiB/s (8422kB/s), 1762KiB/s-3071KiB/s (1805kB/s-3145kB/s), io=28.0MiB (29.4MB), run=2562-3486msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180354: Sat Aug 15 18:12:21 2026 read: IOPS=2, BW=2145KiB/s (2196kB/s)(7168KiB/3342msec) clat (msec): min=46, max=553, avg=295.36, stdev=195.44 lat (msec): min=46, max=553, avg=295.37, stdev=195.44 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 47], 10.00th=[ 47], 20.00th=[ 70], | 30.00th=[ 255], 40.00th=[ 255], 50.00th=[ 292], 60.00th=[ 342], | 70.00th=[ 342], 80.00th=[ 510], 90.00th=[ 558], 95.00th=[ 558], | 99.00th=[ 558], 99.50th=[ 558], 99.90th=[ 558], 99.95th=[ 558], | 99.99th=[ 558] bw ( KiB/s): min= 2019, max= 4023, per=41.22%, avg=2526.00, stdev=998.02, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=1, BW=1532KiB/s (1569kB/s)(5120KiB/3342msec); 0 zone resets clat (msec): min=62, max=268, avg=167.47, stdev=74.79 lat (msec): min=63, max=268, avg=167.56, stdev=74.79 clat percentiles (msec): | 1.00th=[ 64], 5.00th=[ 64], 10.00th=[ 64], 20.00th=[ 64], | 30.00th=[ 140], 40.00th=[ 140], 50.00th=[ 180], 60.00th=[ 180], | 70.00th=[ 186], 80.00th=[ 186], 90.00th=[ 271], 95.00th=[ 271], | 99.00th=[ 271], 99.50th=[ 271], 99.90th=[ 271], 99.95th=[ 271], | 99.99th=[ 271] bw ( KiB/s): min= 2035, max= 6083, per=47.31%, avg=4059.00, stdev=2862.37, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 lat (msec) : 50=8.33%, 100=16.67%, 250=25.00%, 500=33.33%, 750=16.67% cpu : usr=0.00%, sys=10.45%, ctx=93, 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=180355: Sat Aug 15 18:12:21 2026 read: IOPS=0, BW=646KiB/s (661kB/s)(2048KiB/3172msec) clat (msec): min=205, max=395, avg=300.51, stdev=134.62 lat (msec): min=205, max=395, avg=300.51, stdev=134.62 clat percentiles (msec): | 1.00th=[ 205], 5.00th=[ 205], 10.00th=[ 205], 20.00th=[ 205], | 30.00th=[ 205], 40.00th=[ 205], 50.00th=[ 205], 60.00th=[ 397], | 70.00th=[ 397], 80.00th=[ 397], 90.00th=[ 397], 95.00th=[ 397], | 99.00th=[ 397], 99.50th=[ 397], 99.90th=[ 397], 99.95th=[ 397], | 99.99th=[ 397] bw ( KiB/s): min= 1490, max= 2027, per=28.70%, avg=1758.50, stdev=379.72, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=3, BW=3228KiB/s (3306kB/s)(10.0MiB/3172msec); 0 zone resets clat (msec): min=93, max=510, avg=236.79, stdev=156.18 lat (msec): min=94, max=510, avg=236.93, stdev=156.12 clat percentiles (msec): | 1.00th=[ 94], 5.00th=[ 94], 10.00th=[ 94], 20.00th=[ 101], | 30.00th=[ 112], 40.00th=[ 115], 50.00th=[ 155], 60.00th=[ 169], | 70.00th=[ 305], 80.00th=[ 376], 90.00th=[ 435], 95.00th=[ 510], | 99.00th=[ 510], 99.50th=[ 510], 99.90th=[ 510], 99.95th=[ 510], | 99.99th=[ 510] bw ( KiB/s): min= 2011, max= 6107, per=35.45%, avg=3041.00, stdev=2044.01, samples=4 iops : min= 1, max= 5, avg= 2.00, stdev= 2.00, samples=4 lat (msec) : 100=16.67%, 250=41.67%, 500=33.33%, 750=8.33% cpu : usr=0.03%, sys=10.79%, ctx=177, 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=180356: Sat Aug 15 18:12:21 2026 read: IOPS=1, BW=1915KiB/s (1961kB/s)(6144KiB/3208msec) clat (msec): min=104, max=624, avg=239.69, stdev=194.86 lat (msec): min=104, max=624, avg=239.69, stdev=194.86 clat percentiles (msec): | 1.00th=[ 105], 5.00th=[ 105], 10.00th=[ 105], 20.00th=[ 106], | 30.00th=[ 106], 40.00th=[ 176], 50.00th=[ 176], 60.00th=[ 203], | 70.00th=[ 228], 80.00th=[ 228], 90.00th=[ 625], 95.00th=[ 625], | 99.00th=[ 625], 99.50th=[ 625], 99.90th=[ 625], 99.95th=[ 625], | 99.99th=[ 625] bw ( KiB/s): min= 2011, max= 4055, per=44.07%, avg=2700.33, stdev=1173.24, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1915KiB/s (1961kB/s)(6144KiB/3208msec); 0 zone resets clat (msec): min=103, max=493, avg=257.89, stdev=159.57 lat (msec): min=104, max=493, avg=257.97, stdev=159.57 clat percentiles (msec): | 1.00th=[ 105], 5.00th=[ 105], 10.00th=[ 105], 20.00th=[ 128], | 30.00th=[ 128], 40.00th=[ 133], 50.00th=[ 133], 60.00th=[ 334], | 70.00th=[ 355], 80.00th=[ 355], 90.00th=[ 493], 95.00th=[ 493], | 99.00th=[ 493], 99.50th=[ 493], 99.90th=[ 493], 99.95th=[ 493], | 99.99th=[ 493] bw ( KiB/s): min= 1446, max= 2027, per=21.86%, avg=1875.75, stdev=286.57, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 250=66.67%, 500=25.00%, 750=8.33% cpu : usr=0.00%, sys=8.23%, ctx=113, 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=180357: Sat Aug 15 18:12:21 2026 read: IOPS=1, BW=1552KiB/s (1589kB/s)(5120KiB/3300msec) clat (msec): min=83, max=351, avg=148.46, stdev=114.00 lat (msec): min=83, max=351, avg=148.46, stdev=114.00 clat percentiles (msec): | 1.00th=[ 84], 5.00th=[ 84], 10.00th=[ 84], 20.00th=[ 84], | 30.00th=[ 99], 40.00th=[ 99], 50.00th=[ 104], 60.00th=[ 104], | 70.00th=[ 106], 80.00th=[ 106], 90.00th=[ 351], 95.00th=[ 351], | 99.00th=[ 351], 99.50th=[ 351], 99.90th=[ 351], 99.95th=[ 351], | 99.99th=[ 351] bw ( KiB/s): min= 2027, max= 4055, per=44.15%, avg=2705.67, stdev=1168.56, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=2, BW=2172KiB/s (2224kB/s)(7168KiB/3300msec); 0 zone resets clat (msec): min=132, max=803, avg=297.85, stdev=240.12 lat (msec): min=132, max=803, avg=297.93, stdev=240.11 clat percentiles (msec): | 1.00th=[ 133], 5.00th=[ 133], 10.00th=[ 133], 20.00th=[ 140], | 30.00th=[ 178], 40.00th=[ 178], 50.00th=[ 209], 60.00th=[ 228], | 70.00th=[ 228], 80.00th=[ 397], 90.00th=[ 802], 95.00th=[ 802], | 99.00th=[ 802], 99.50th=[ 802], 99.90th=[ 802], 99.95th=[ 802], | 99.99th=[ 802] bw ( KiB/s): min= 2035, max= 6083, per=54.99%, avg=4717.67, stdev=2323.38, samples=3 iops : min= 1, max= 5, avg= 3.67, stdev= 2.31, samples=3 lat (msec) : 100=16.67%, 250=58.33%, 500=16.67%, 1000=8.33% cpu : usr=0.00%, sys=14.64%, ctx=134, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=6128KiB/s (6275kB/s), 646KiB/s-2145KiB/s (661kB/s-2196kB/s), io=20.0MiB (20.0MB), run=3172-3342msec WRITE: bw=8579KiB/s (8785kB/s), 1532KiB/s-3228KiB/s (1569kB/s-3306kB/s), io=28.0MiB (29.4MB), run=3172-3342msec 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=180367: Sat Aug 15 18:12:32 2026 read: IOPS=1, BW=6225KiB/s (6374kB/s)(12.0MiB/1974msec) clat (msec): min=561, max=721, avg=647.38, stdev=80.62 lat (msec): min=561, max=721, avg=647.39, stdev=80.62 clat percentiles (msec): | 1.00th=[ 558], 5.00th=[ 558], 10.00th=[ 558], 20.00th=[ 558], | 30.00th=[ 558], 40.00th=[ 659], 50.00th=[ 659], 60.00th=[ 659], | 70.00th=[ 726], 80.00th=[ 726], 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= 5997, max= 8159, per=96.47%, avg=7078.00, stdev=1528.76, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=100.00% cpu : usr=0.10%, sys=21.69%, ctx=259, 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=180368: Sat Aug 15 18:12:32 2026 read: IOPS=0, BW=1834KiB/s (1878kB/s)(4096KiB/2233msec) clat (nsec): min=585667k, max=585667k, avg=585666578.00, stdev= 0.00 lat (nsec): min=585669k, max=585669k, avg=585669276.00, stdev= 0.00 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=[ 584], | 70.00th=[ 584], 80.00th=[ 584], 90.00th=[ 584], 95.00th=[ 584], | 99.00th=[ 584], 99.50th=[ 584], 99.90th=[ 584], 99.95th=[ 584], | 99.99th=[ 584] bw ( KiB/s): min= 5618, max= 5618, per=76.57%, avg=5618.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3669KiB/s (3757kB/s)(8192KiB/2233msec); 0 zone resets clat (msec): min=663, max=929, avg=796.72, stdev=187.80 lat (msec): min=664, max=929, avg=797.26, stdev=187.68 clat percentiles (msec): | 1.00th=[ 667], 5.00th=[ 667], 10.00th=[ 667], 20.00th=[ 667], | 30.00th=[ 667], 40.00th=[ 667], 50.00th=[ 667], 60.00th=[ 927], | 70.00th=[ 927], 80.00th=[ 927], 90.00th=[ 927], 95.00th=[ 927], | 99.00th=[ 927], 99.50th=[ 927], 99.90th=[ 927], 99.95th=[ 927], | 99.99th=[ 927] bw ( KiB/s): min= 8159, max= 8159, per=59.59%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.09%, sys=8.83%, ctx=124, 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=180370: Sat Aug 15 18:12:32 2026 write: IOPS=1, BW=5135KiB/s (5258kB/s)(12.0MiB/2393msec); 0 zone resets clat (msec): min=440, max=1107, avg=777.81, stdev=333.84 lat (msec): min=441, max=1108, avg=778.55, stdev=333.69 clat percentiles (msec): | 1.00th=[ 439], 5.00th=[ 439], 10.00th=[ 439], 20.00th=[ 439], | 30.00th=[ 439], 40.00th=[ 785], 50.00th=[ 785], 60.00th=[ 785], | 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= 8159, max= 8192, per=59.71%, avg=8175.50, stdev=23.33, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=8.15%, ctx=62, 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=180372: Sat Aug 15 18:12:32 2026 write: IOPS=1, BW=5804KiB/s (5944kB/s)(12.0MiB/2117msec); 0 zone resets clat (msec): min=260, max=1518, avg=683.45, stdev=722.92 lat (msec): min=262, max=1518, avg=684.20, stdev=722.50 clat percentiles (msec): | 1.00th=[ 262], 5.00th=[ 262], 10.00th=[ 262], 20.00th=[ 262], | 30.00th=[ 262], 40.00th=[ 271], 50.00th=[ 271], 60.00th=[ 271], | 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=13585, max=13585, per=99.21%, avg=13585.00, stdev= 0.00, samples=1 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=1 lat (msec) : 500=66.67%, 2000=33.33% cpu : usr=0.00%, sys=6.90%, ctx=55, 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=7337KiB/s (7513kB/s), 1834KiB/s-6225KiB/s (1878kB/s-6374kB/s), io=16.0MiB (16.8MB), run=1974-2233msec WRITE: bw=13.4MiB/s (14.0MB/s), 3669KiB/s-5804KiB/s (3757kB/s-5944kB/s), io=32.0MiB (33.6MB), run=2117-2393msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180365: Sat Aug 15 18:12:32 2026 read: IOPS=1, BW=4739KiB/s (4853kB/s)(12.0MiB/2593msec) clat (msec): min=178, max=1268, avg=838.69, stdev=580.41 lat (msec): min=178, max=1268, avg=838.69, stdev=580.41 clat percentiles (msec): | 1.00th=[ 180], 5.00th=[ 180], 10.00th=[ 180], 20.00th=[ 180], | 30.00th=[ 180], 40.00th=[ 1070], 50.00th=[ 1070], 60.00th=[ 1070], | 70.00th=[ 1267], 80.00th=[ 1267], 90.00th=[ 1267], 95.00th=[ 1267], | 99.00th=[ 1267], 99.50th=[ 1267], 99.90th=[ 1267], 99.95th=[ 1267], | 99.99th=[ 1267] bw ( KiB/s): min= 8062, max= 8159, per=100.00%, avg=8110.50, stdev=68.59, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.98%, ctx=52, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=180366: Sat Aug 15 18:12:32 2026 read: IOPS=0, BW=1463KiB/s (1498kB/s)(4096KiB/2800msec) clat (nsec): min=606874k, max=606874k, avg=606874231.00, stdev= 0.00 lat (nsec): min=606877k, max=606877k, avg=606877156.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 609], 5.00th=[ 609], 10.00th=[ 609], 20.00th=[ 609], | 30.00th=[ 609], 40.00th=[ 609], 50.00th=[ 609], 60.00th=[ 609], | 70.00th=[ 609], 80.00th=[ 609], 90.00th=[ 609], 95.00th=[ 609], | 99.00th=[ 609], 99.50th=[ 609], 99.90th=[ 609], 99.95th=[ 609], | 99.99th=[ 609] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2926KiB/s (2996kB/s)(8192KiB/2800msec); 0 zone resets clat (msec): min=407, max=1758, avg=1082.77, stdev=955.03 lat (msec): min=407, max=1758, avg=1083.21, stdev=955.16 clat percentiles (msec): | 1.00th=[ 409], 5.00th=[ 409], 10.00th=[ 409], 20.00th=[ 409], | 30.00th=[ 409], 40.00th=[ 409], 50.00th=[ 409], 60.00th=[ 1754], | 70.00th=[ 1754], 80.00th=[ 1754], 90.00th=[ 1754], 95.00th=[ 1754], | 99.00th=[ 1754], 99.50th=[ 1754], 99.90th=[ 1754], 99.95th=[ 1754], | 99.99th=[ 1754] bw ( KiB/s): min= 8159, max= 8159, per=69.72%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=5.93%, ctx=89, 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=180369: Sat Aug 15 18:12:32 2026 write: IOPS=1, BW=4459KiB/s (4566kB/s)(12.0MiB/2756msec); 0 zone resets clat (msec): min=183, max=1526, avg=889.29, stdev=674.04 lat (msec): min=183, max=1526, avg=889.62, stdev=674.06 clat percentiles (msec): | 1.00th=[ 184], 5.00th=[ 184], 10.00th=[ 184], 20.00th=[ 184], | 30.00th=[ 184], 40.00th=[ 961], 50.00th=[ 961], 60.00th=[ 961], | 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= 8192, max= 8192, per=70.01%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.46%, ctx=59, 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=180371: Sat Aug 15 18:12:32 2026 write: IOPS=1, BW=5290KiB/s (5417kB/s)(12.0MiB/2323msec); 0 zone resets clat (msec): min=519, max=1016, avg=751.95, stdev=250.02 lat (msec): min=520, max=1016, avg=752.24, stdev=249.92 clat percentiles (msec): | 1.00th=[ 518], 5.00th=[ 518], 10.00th=[ 518], 20.00th=[ 518], | 30.00th=[ 518], 40.00th=[ 718], 50.00th=[ 718], 60.00th=[ 718], | 70.00th=[ 1020], 80.00th=[ 1020], 90.00th=[ 1020], 95.00th=[ 1020], | 99.00th=[ 1020], 99.50th=[ 1020], 99.90th=[ 1020], 99.95th=[ 1020], | 99.99th=[ 1020] bw ( KiB/s): min= 8062, max= 8143, per=69.24%, avg=8102.50, stdev=57.28, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.00%, sys=7.24%, ctx=70, 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=5851KiB/s (5992kB/s), 1463KiB/s-4739KiB/s (1498kB/s-4853kB/s), io=16.0MiB (16.8MB), run=2593-2800msec WRITE: bw=11.4MiB/s (11.0MB/s), 2926KiB/s-5290KiB/s (2996kB/s-5417kB/s), io=32.0MiB (33.6MB), run=2323-2800msec