== sanity test 398b: DIO and buffer IO race ============== 12:52:50 (1788627170) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 8.09389 s, 6.2 MB/s mix direct rw 4096 by fio with 4 jobs... mix buffer rw 4096 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=145033: Sat Sep 5 12:55:36 2026 read: IOPS=10, BW=42.6KiB/s (43.6kB/s)(5992KiB/140670msec) clat (usec): min=30, max=1030.5k, avg=45516.15, stdev=47254.41 lat (usec): min=30, max=1030.5k, avg=45518.27, stdev=47254.63 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 59], 10.00th=[ 74], | 20.00th=[ 17957], 30.00th=[ 24773], 40.00th=[ 30016], | 50.00th=[ 36963], 60.00th=[ 44303], 70.00th=[ 54264], | 80.00th=[ 69731], 90.00th=[ 90702], 95.00th=[ 109577], | 99.00th=[ 160433], 99.50th=[ 244319], 99.90th=[ 583009], | 99.95th=[1027605], 99.99th=[1027605] bw ( KiB/s): min= 7, max= 100, per=25.10%, avg=42.17, stdev=19.66, samples=276 iops : min= 1, max= 25, avg= 9.89, stdev= 4.99, samples=276 write: IOPS=11, BW=44.8KiB/s (45.8kB/s)(6296KiB/140670msec); 0 zone resets clat (usec): min=909, max=324068, avg=45690.28, stdev=47867.37 lat (usec): min=911, max=324069, avg=45692.90, stdev=47866.64 clat percentiles (usec): | 1.00th=[ 1106], 5.00th=[ 1221], 10.00th=[ 1418], 20.00th=[ 3851], | 30.00th=[ 8160], 40.00th=[ 17695], 50.00th=[ 33162], 60.00th=[ 45876], | 70.00th=[ 62129], 80.00th=[ 82314], 90.00th=[109577], 95.00th=[141558], | 99.00th=[202376], 99.50th=[235930], 99.90th=[312476], 99.95th=[325059], | 99.99th=[325059] bw ( KiB/s): min= 7, max= 112, per=25.38%, avg=44.66, stdev=20.54, samples=274 iops : min= 1, max= 28, avg=10.51, stdev= 5.17, samples=274 lat (usec) : 50=0.62%, 100=5.08%, 250=0.55%, 500=0.10%, 750=0.03% lat (usec) : 1000=0.10% lat (msec) : 2=6.87%, 4=3.68%, 10=6.64%, 20=8.53%, 50=32.16% lat (msec) : 100=25.55%, 250=9.70%, 500=0.33%, 750=0.03%, 2000=0.03% cpu : usr=0.07%, sys=4.81%, ctx=6176, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145034: Sat Sep 5 12:55:36 2026 read: IOPS=10, BW=43.6KiB/s (44.6kB/s)(5940KiB/136259msec) clat (usec): min=33, max=1040.5k, avg=44600.87, stdev=44203.18 lat (usec): min=34, max=1040.5k, avg=44605.36, stdev=44202.11 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 59], 10.00th=[ 78], | 20.00th=[ 18744], 30.00th=[ 25035], 40.00th=[ 30802], | 50.00th=[ 37487], 60.00th=[ 44303], 70.00th=[ 53740], | 80.00th=[ 66847], 90.00th=[ 88605], 95.00th=[ 105382], | 99.00th=[ 158335], 99.50th=[ 219153], 99.90th=[ 404751], | 99.95th=[1044382], 99.99th=[1044382] bw ( KiB/s): min= 5, max= 120, per=25.87%, avg=43.46, stdev=19.44, samples=266 iops : min= 1, max= 30, avg=10.22, stdev= 4.91, samples=266 write: IOPS=11, BW=46.6KiB/s (47.7kB/s)(6348KiB/136259msec); 0 zone resets clat (usec): min=905, max=533394, avg=43812.14, stdev=47217.01 lat (usec): min=905, max=533397, avg=43816.11, stdev=47218.49 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1221], 10.00th=[ 1418], 20.00th=[ 3851], | 30.00th=[ 8455], 40.00th=[ 17957], 50.00th=[ 31589], 60.00th=[ 43779], | 70.00th=[ 57410], 80.00th=[ 78119], 90.00th=[105382], 95.00th=[133694], | 99.00th=[198181], 99.50th=[227541], 99.90th=[299893], 99.95th=[534774], | 99.99th=[534774] bw ( KiB/s): min= 7, max= 111, per=26.38%, avg=46.44, stdev=22.12, samples=266 iops : min= 1, max= 27, avg=10.96, stdev= 5.58, samples=266 lat (usec) : 50=0.65%, 100=4.95%, 250=0.42%, 500=0.07%, 750=0.07% lat (usec) : 1000=0.16% lat (msec) : 2=7.06%, 4=3.48%, 10=6.54%, 20=8.72%, 50=33.04% lat (msec) : 100=25.98%, 250=8.50%, 500=0.29%, 750=0.03%, 2000=0.03% cpu : usr=0.09%, sys=5.00%, ctx=6124, 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=145036: Sat Sep 5 12:55:36 2026 read: IOPS=10, BW=42.2KiB/s (43.2kB/s)(6028KiB/142780msec) clat (usec): min=32, max=274171, avg=42464.68, stdev=33103.91 lat (usec): min=32, max=274172, avg=42468.42, stdev=33104.34 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 59], 10.00th=[ 78], 20.00th=[ 16909], | 30.00th=[ 23987], 40.00th=[ 29492], 50.00th=[ 35914], 60.00th=[ 44303], | 70.00th=[ 53216], 80.00th=[ 66323], 90.00th=[ 85459], 95.00th=[106431], | 99.00th=[141558], 99.50th=[160433], 99.90th=[231736], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 7, max= 134, per=25.46%, avg=42.78, stdev=21.53, samples=273 iops : min= 1, max= 33, avg=10.05, stdev= 5.44, samples=273 write: IOPS=10, BW=43.8KiB/s (44.9kB/s)(6260KiB/142780msec); 0 zone resets clat (usec): min=866, max=1277.3k, avg=49994.10, stdev=64044.41 lat (usec): min=867, max=1277.3k, avg=49995.91, stdev=64044.75 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1188], 10.00th=[ 1385], | 20.00th=[ 3589], 30.00th=[ 8356], 40.00th=[ 19006], | 50.00th=[ 35390], 60.00th=[ 49021], 70.00th=[ 64750], | 80.00th=[ 84411], 90.00th=[ 119014], 95.00th=[ 147850], | 99.00th=[ 240124], 99.50th=[ 304088], 99.90th=[ 700449], | 99.95th=[1283458], 99.99th=[1283458] bw ( KiB/s): min= 7, max= 134, per=24.93%, avg=43.88, stdev=20.01, samples=276 iops : min= 1, max= 33, avg=10.33, stdev= 5.04, samples=276 lat (usec) : 50=0.68%, 100=5.08%, 250=0.55%, 500=0.10%, 750=0.07% lat (usec) : 1000=0.23% lat (msec) : 2=7.03%, 4=3.68%, 10=5.86%, 20=9.31%, 50=30.76% lat (msec) : 100=26.24%, 250=9.99%, 500=0.33%, 750=0.07%, 2000=0.03% cpu : usr=0.09%, sys=4.79%, ctx=6311, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145039: Sat Sep 5 12:55:36 2026 read: IOPS=10, BW=42.7KiB/s (43.7kB/s)(6052KiB/141725msec) clat (usec): min=29, max=271908, avg=43671.94, stdev=33893.54 lat (usec): min=30, max=271910, avg=43673.62, stdev=33893.98 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 57], 10.00th=[ 73], 20.00th=[ 18220], | 30.00th=[ 25297], 40.00th=[ 30802], 50.00th=[ 37487], 60.00th=[ 45351], | 70.00th=[ 54264], 80.00th=[ 68682], 90.00th=[ 88605], 95.00th=[105382], | 99.00th=[139461], 99.50th=[170918], 99.90th=[263193], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 7, max= 104, per=25.86%, avg=43.45, stdev=19.35, samples=271 iops : min= 1, max= 26, avg=10.20, stdev= 4.86, samples=271 write: IOPS=11, BW=44.0KiB/s (45.1kB/s)(6236KiB/141725msec); 0 zone resets clat (usec): min=970, max=1126.5k, avg=48149.52, stdev=55811.74 lat (usec): min=971, max=1126.5k, avg=48151.23, stdev=55811.66 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1221], 10.00th=[ 1450], | 20.00th=[ 4752], 30.00th=[ 9896], 40.00th=[ 21890], | 50.00th=[ 35914], 60.00th=[ 49021], 70.00th=[ 63177], | 80.00th=[ 82314], 90.00th=[ 111674], 95.00th=[ 139461], | 99.00th=[ 206570], 99.50th=[ 246416], 99.90th=[ 421528], | 99.95th=[1132463], 99.99th=[1132463] bw ( KiB/s): min= 7, max= 136, per=24.82%, avg=43.69, stdev=19.34, samples=277 iops : min= 1, max= 34, avg=10.26, stdev= 4.87, samples=277 lat (usec) : 50=0.85%, 100=5.21%, 250=0.62%, 500=0.10%, 750=0.03% lat (usec) : 1000=0.13% lat (msec) : 2=6.15%, 4=3.26%, 10=6.41%, 20=7.62%, 50=32.49% lat (msec) : 100=26.79%, 250=10.06%, 500=0.26%, 2000=0.03% cpu : usr=0.08%, sys=4.88%, ctx=6364, 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=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=168KiB/s (172kB/s), 42.2KiB/s-43.6KiB/s (43.2kB/s-44.6kB/s), io=23.4MiB (24.6MB), run=136259-142780msec WRITE: bw=176KiB/s (180kB/s), 43.8KiB/s-46.6KiB/s (44.9kB/s-47.7kB/s), io=24.6MiB (25.7MB), run=136259-142780msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145032: Sat Sep 5 12:58:50 2026 read: IOPS=4, BW=17.8KiB/s (18.2kB/s)(5992KiB/336930msec) clat (msec): min=6, max=1080, avg=43.73, stdev=47.20 lat (msec): min=6, max=1080, avg=43.74, stdev=47.20 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 32], 60.00th=[ 38], | 70.00th=[ 47], 80.00th=[ 63], 90.00th=[ 88], 95.00th=[ 113], | 99.00th=[ 188], 99.50th=[ 245], 99.90th=[ 510], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 7, max= 87, per=29.45%, avg=20.91, stdev=14.48, samples=550 iops : min= 1, max= 21, avg= 4.58, stdev= 3.66, samples=550 write: IOPS=4, BW=18.7KiB/s (19.1kB/s)(6296KiB/336930msec); 0 zone resets clat (msec): min=31, max=735, avg=172.14, stdev=75.75 lat (msec): min=31, max=735, avg=172.15, stdev=75.75 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 77], 10.00th=[ 91], 20.00th=[ 111], | 30.00th=[ 128], 40.00th=[ 144], 50.00th=[ 161], 60.00th=[ 178], | 70.00th=[ 197], 80.00th=[ 224], 90.00th=[ 268], 95.00th=[ 313], | 99.00th=[ 422], 99.50th=[ 443], 99.90th=[ 642], 99.95th=[ 735], | 99.99th=[ 735] bw ( KiB/s): min= 7, max= 55, per=24.86%, avg=18.39, stdev= 8.08, samples=653 iops : min= 1, max= 13, avg= 3.95, stdev= 2.06, samples=653 lat (msec) : 10=1.46%, 20=11.52%, 50=22.98%, 100=16.57%, 250=40.23% lat (msec) : 500=7.10%, 750=0.10%, 2000=0.03% cpu : usr=0.04%, sys=1.01%, ctx=5342, 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=145035: Sat Sep 5 12:58:50 2026 read: IOPS=4, BW=17.7KiB/s (18.1kB/s)(5940KiB/336512msec) clat (msec): min=6, max=1083, avg=42.65, stdev=47.41 lat (msec): min=6, max=1083, avg=42.65, stdev=47.41 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 37], | 70.00th=[ 45], 80.00th=[ 59], 90.00th=[ 88], 95.00th=[ 113], | 99.00th=[ 176], 99.50th=[ 245], 99.90th=[ 600], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 7, max= 95, per=30.45%, avg=21.62, stdev=14.44, samples=527 iops : min= 1, max= 23, avg= 4.76, stdev= 3.65, samples=527 write: IOPS=4, BW=18.9KiB/s (19.3kB/s)(6348KiB/336512msec); 0 zone resets clat (msec): min=31, max=565, avg=171.84, stdev=75.31 lat (msec): min=31, max=565, avg=171.85, stdev=75.31 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 77], 10.00th=[ 91], 20.00th=[ 109], | 30.00th=[ 124], 40.00th=[ 140], 50.00th=[ 159], 60.00th=[ 178], | 70.00th=[ 201], 80.00th=[ 228], 90.00th=[ 275], 95.00th=[ 317], | 99.00th=[ 401], 99.50th=[ 435], 99.90th=[ 550], 99.95th=[ 567], | 99.99th=[ 567] bw ( KiB/s): min= 7, max= 56, per=24.99%, avg=18.49, stdev= 8.40, samples=655 iops : min= 1, max= 14, avg= 3.97, stdev= 2.14, samples=655 lat (msec) : 10=2.21%, 20=11.07%, 50=23.08%, 100=16.50%, 250=39.45% lat (msec) : 500=7.49%, 750=0.16%, 2000=0.03% cpu : usr=0.05%, sys=1.02%, ctx=5358, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145037: Sat Sep 5 12:58:50 2026 read: IOPS=4, BW=17.9KiB/s (18.4kB/s)(6028KiB/336133msec) clat (msec): min=5, max=432, avg=43.54, stdev=39.35 lat (msec): min=5, max=432, avg=43.55, stdev=39.35 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 27], 50.00th=[ 32], 60.00th=[ 39], | 70.00th=[ 47], 80.00th=[ 63], 90.00th=[ 88], 95.00th=[ 116], | 99.00th=[ 182], 99.50th=[ 218], 99.90th=[ 426], 99.95th=[ 435], | 99.99th=[ 435] bw ( KiB/s): min= 7, max= 72, per=29.66%, avg=21.06, stdev=14.08, samples=549 iops : min= 1, max= 18, avg= 4.62, stdev= 3.57, samples=549 write: IOPS=4, BW=18.6KiB/s (19.1kB/s)(6260KiB/336133msec); 0 zone resets clat (msec): min=37, max=1271, avg=172.54, stdev=80.00 lat (msec): min=37, max=1271, avg=172.55, stdev=80.00 clat percentiles (msec): | 1.00th=[ 62], 5.00th=[ 81], 10.00th=[ 93], 20.00th=[ 111], | 30.00th=[ 128], 40.00th=[ 144], 50.00th=[ 157], 60.00th=[ 178], | 70.00th=[ 197], 80.00th=[ 222], 90.00th=[ 268], 95.00th=[ 321], | 99.00th=[ 401], 99.50th=[ 485], 99.90th=[ 735], 99.95th=[ 1267], | 99.99th=[ 1267] bw ( KiB/s): min= 7, max= 56, per=24.93%, avg=18.45, stdev= 7.94, samples=647 iops : min= 1, max= 14, avg= 3.96, stdev= 2.03, samples=647 lat (msec) : 10=1.69%, 20=11.00%, 50=22.82%, 100=17.06%, 250=40.53% lat (msec) : 500=6.74%, 750=0.13%, 2000=0.03% cpu : usr=0.04%, sys=1.00%, ctx=5367, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145038: Sat Sep 5 12:58:50 2026 read: IOPS=4, BW=18.2KiB/s (18.6kB/s)(6052KiB/332364msec) clat (msec): min=6, max=433, avg=43.45, stdev=41.18 lat (msec): min=6, max=433, avg=43.45, stdev=41.18 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 37], | 70.00th=[ 46], 80.00th=[ 59], 90.00th=[ 90], 95.00th=[ 126], | 99.00th=[ 197], 99.50th=[ 230], 99.90th=[ 409], 99.95th=[ 435], | 99.99th=[ 435] bw ( KiB/s): min= 7, max= 95, per=30.91%, avg=21.95, stdev=15.28, samples=530 iops : min= 1, max= 23, avg= 4.85, stdev= 3.86, samples=530 write: IOPS=4, BW=18.8KiB/s (19.2kB/s)(6236KiB/332364msec); 0 zone resets clat (msec): min=37, max=1169, avg=170.73, stdev=79.41 lat (msec): min=37, max=1169, avg=170.74, stdev=79.41 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 77], 10.00th=[ 90], 20.00th=[ 108], | 30.00th=[ 125], 40.00th=[ 142], 50.00th=[ 159], 60.00th=[ 178], | 70.00th=[ 199], 80.00th=[ 224], 90.00th=[ 268], 95.00th=[ 309], | 99.00th=[ 384], 99.50th=[ 510], 99.90th=[ 735], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 7, max= 47, per=24.98%, avg=18.49, stdev= 8.25, samples=644 iops : min= 1, max= 11, avg= 3.97, stdev= 2.11, samples=644 lat (msec) : 10=1.76%, 20=11.39%, 50=23.86%, 100=15.98%, 250=40.01% lat (msec) : 500=6.74%, 750=0.23%, 2000=0.03% cpu : usr=0.04%, sys=1.05%, ctx=5296, 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=71.3KiB/s (72.0kB/s), 17.7KiB/s-18.2KiB/s (18.1kB/s-18.6kB/s), io=23.4MiB (24.6MB), run=332364-336930msec WRITE: bw=74.6KiB/s (76.4kB/s), 18.6KiB/s-18.9KiB/s (19.1kB/s-19.3kB/s), io=24.6MiB (25.7MB), run=332364-336930msec 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=145111: Sat Sep 5 12:59:34 2026 read: IOPS=13, BW=209KiB/s (214kB/s)(5920KiB/28330msec) clat (usec): min=32, max=256697, avg=38550.67, stdev=40556.54 lat (usec): min=32, max=256698, avg=38584.99, stdev=40552.16 clat percentiles (usec): | 1.00th=[ 37], 5.00th=[ 51], 10.00th=[ 58], 20.00th=[ 67], | 30.00th=[ 96], 40.00th=[ 22414], 50.00th=[ 32637], 60.00th=[ 41681], | 70.00th=[ 52691], 80.00th=[ 64750], 90.00th=[ 91751], 95.00th=[113771], | 99.00th=[158335], 99.50th=[225444], 99.90th=[256902], 99.95th=[256902], | 99.99th=[256902] bw ( KiB/s): min= 63, max= 383, per=25.52%, avg=209.00, stdev=84.98, samples=55 iops : min= 3, max= 23, avg=12.29, stdev= 5.36, samples=55 write: IOPS=14, BW=225KiB/s (230kB/s)(6368KiB/28330msec); 0 zone resets clat (usec): min=1064, max=204396, avg=34550.93, stdev=38673.54 lat (usec): min=1067, max=204398, avg=34552.91, stdev=38673.52 clat percentiles (usec): | 1.00th=[ 1369], 5.00th=[ 1549], 10.00th=[ 1844], 20.00th=[ 4817], | 30.00th=[ 7767], 40.00th=[ 11600], 50.00th=[ 19268], 60.00th=[ 28181], | 70.00th=[ 41681], 80.00th=[ 61604], 90.00th=[ 94897], 95.00th=[113771], | 99.00th=[185598], 99.50th=[204473], 99.90th=[204473], 99.95th=[204473], | 99.99th=[204473] bw ( KiB/s): min= 23, max= 447, per=26.24%, avg=226.22, stdev=92.46, samples=55 iops : min= 1, max= 27, avg=13.36, stdev= 5.79, samples=55 lat (usec) : 50=2.21%, 100=12.37%, 250=0.91%, 500=0.26%, 750=0.39% lat (msec) : 2=5.99%, 4=3.26%, 10=9.77%, 20=9.90%, 50=25.39% lat (msec) : 100=21.61%, 250=7.81%, 500=0.13% cpu : usr=0.10%, sys=5.78%, ctx=1232, 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=145112: Sat Sep 5 12:59:34 2026 read: IOPS=12, BW=198KiB/s (202kB/s)(5744KiB/29081msec) clat (usec): min=36, max=235830, avg=39002.76, stdev=37346.31 lat (usec): min=36, max=235831, avg=39004.05, stdev=37346.39 clat percentiles (usec): | 1.00th=[ 38], 5.00th=[ 49], 10.00th=[ 58], 20.00th=[ 70], | 30.00th=[ 783], 40.00th=[ 27657], 50.00th=[ 38011], 60.00th=[ 46400], | 70.00th=[ 53740], 80.00th=[ 65799], 90.00th=[ 81265], 95.00th=[ 98042], | 99.00th=[149947], 99.50th=[219153], 99.90th=[235930], 99.95th=[235930], | 99.99th=[235930] bw ( KiB/s): min= 31, max= 509, per=24.14%, avg=197.71, stdev=92.99, samples=56 iops : min= 1, max= 31, avg=11.57, stdev= 5.88, samples=56 write: IOPS=14, BW=225KiB/s (230kB/s)(6544KiB/29081msec); 0 zone resets clat (usec): min=1342, max=321182, avg=35858.76, stdev=40488.60 lat (usec): min=1342, max=321185, avg=35860.83, stdev=40488.64 clat percentiles (usec): | 1.00th=[ 1418], 5.00th=[ 1680], 10.00th=[ 2573], 20.00th=[ 4817], | 30.00th=[ 8094], 40.00th=[ 12256], 50.00th=[ 19530], 60.00th=[ 31327], | 70.00th=[ 49021], 80.00th=[ 61080], 90.00th=[ 88605], 95.00th=[113771], | 99.00th=[179307], 99.50th=[204473], 99.90th=[320865], 99.95th=[320865], | 99.99th=[320865] bw ( KiB/s): min= 62, max= 413, per=26.50%, avg=228.45, stdev=88.04, samples=55 iops : min= 3, max= 25, avg=13.53, stdev= 5.58, samples=55 lat (usec) : 50=2.47%, 100=10.29%, 250=0.78%, 500=0.26%, 1000=0.26% lat (msec) : 2=5.08%, 4=3.78%, 10=10.42%, 20=9.77%, 50=24.87% lat (msec) : 100=26.04%, 250=5.86%, 500=0.13% cpu : usr=0.07%, sys=4.89%, ctx=1207, 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=145113: Sat Sep 5 12:59:34 2026 read: IOPS=13, BW=216KiB/s (221kB/s)(6256KiB/28939msec) clat (usec): min=31, max=276737, avg=35868.78, stdev=37413.65 lat (usec): min=32, max=276739, avg=35869.91, stdev=37413.61 clat percentiles (usec): | 1.00th=[ 36], 5.00th=[ 46], 10.00th=[ 57], 20.00th=[ 64], | 30.00th=[ 79], 40.00th=[ 22152], 50.00th=[ 32113], 60.00th=[ 39584], | 70.00th=[ 50070], 80.00th=[ 63177], 90.00th=[ 82314], 95.00th=[100140], | 99.00th=[149947], 99.50th=[175113], 99.90th=[274727], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 63, max= 536, per=26.57%, avg=217.57, stdev=107.64, samples=56 iops : min= 3, max= 33, avg=12.82, stdev= 6.75, samples=56 write: IOPS=13, BW=208KiB/s (213kB/s)(6032KiB/28939msec); 0 zone resets clat (usec): min=1366, max=268742, avg=39345.08, stdev=42941.87 lat (usec): min=1368, max=268745, avg=39347.79, stdev=42941.51 clat percentiles (usec): | 1.00th=[ 1401], 5.00th=[ 1565], 10.00th=[ 1795], 20.00th=[ 5276], | 30.00th=[ 9110], 40.00th=[ 17433], 50.00th=[ 27395], 60.00th=[ 39060], | 70.00th=[ 50594], 80.00th=[ 65274], 90.00th=[ 91751], 95.00th=[120062], | 99.00th=[231736], 99.50th=[256902], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 31, max= 506, per=23.94%, avg=206.36, stdev=95.68, samples=56 iops : min= 1, max= 31, avg=12.13, stdev= 6.03, samples=56 lat (usec) : 50=3.12%, 100=13.80%, 250=0.26%, 500=0.39%, 750=0.26% lat (msec) : 2=5.73%, 4=2.34%, 10=7.68%, 20=7.16%, 50=28.91% lat (msec) : 100=23.83%, 250=6.12%, 500=0.39% cpu : usr=0.06%, sys=5.26%, ctx=1260, 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=145115: Sat Sep 5 12:59:34 2026 read: IOPS=12, BW=206KiB/s (211kB/s)(6032KiB/29229msec) clat (usec): min=24, max=180465, avg=34758.01, stdev=36109.60 lat (usec): min=24, max=180467, avg=34759.15, stdev=36109.65 clat percentiles (usec): | 1.00th=[ 37], 5.00th=[ 43], 10.00th=[ 55], 20.00th=[ 63], | 30.00th=[ 73], 40.00th=[ 18482], 50.00th=[ 30802], 60.00th=[ 41681], | 70.00th=[ 49021], 80.00th=[ 62653], 90.00th=[ 82314], 95.00th=[ 96994], | 99.00th=[154141], 99.50th=[168821], 99.90th=[181404], 99.95th=[181404], | 99.99th=[181404] bw ( KiB/s): min= 63, max= 532, per=25.86%, avg=211.78, stdev=102.02, samples=55 iops : min= 3, max= 33, avg=12.45, stdev= 6.47, samples=55 write: IOPS=13, BW=214KiB/s (219kB/s)(6256KiB/29229msec); 0 zone resets clat (usec): min=1353, max=390058, avg=40343.49, stdev=49255.61 lat (usec): min=1355, max=390060, avg=40346.51, stdev=49255.29 clat percentiles (usec): | 1.00th=[ 1401], 5.00th=[ 1598], 10.00th=[ 1811], 20.00th=[ 4752], | 30.00th=[ 7963], 40.00th=[ 12125], 50.00th=[ 20841], 60.00th=[ 34341], | 70.00th=[ 48497], 80.00th=[ 71828], 90.00th=[100140], 95.00th=[127402], | 99.00th=[244319], 99.50th=[246416], 99.90th=[387974], 99.95th=[387974], | 99.99th=[387974] bw ( KiB/s): min= 23, max= 510, per=24.81%, avg=213.89, stdev=106.48, samples=57 iops : min= 1, max= 31, avg=12.60, stdev= 6.71, samples=57 lat (usec) : 50=3.65%, 100=13.54%, 250=0.52%, 500=0.39%, 750=0.13% lat (msec) : 2=6.38%, 4=2.86%, 10=10.29%, 20=7.03%, 50=25.65% lat (msec) : 100=22.01%, 250=7.42%, 500=0.13% cpu : usr=0.07%, sys=5.42%, ctx=1227, 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=819KiB/s (839kB/s), 198KiB/s-216KiB/s (202kB/s-221kB/s), io=23.4MiB (24.5MB), run=28330-29229msec WRITE: bw=862KiB/s (883kB/s), 208KiB/s-225KiB/s (213kB/s-230kB/s), io=24.6MiB (25.8MB), run=28330-29229msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145114: Sat Sep 5 13:00:22 2026 read: IOPS=4, BW=77.0KiB/s (78.9kB/s)(5920KiB/76859msec) clat (msec): min=6, max=267, avg=37.86, stdev=38.12 lat (msec): min=6, max=267, avg=37.86, stdev=38.13 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 29], | 70.00th=[ 36], 80.00th=[ 48], 90.00th=[ 89], 95.00th=[ 116], | 99.00th=[ 207], 99.50th=[ 268], 99.90th=[ 268], 99.95th=[ 268], | 99.99th=[ 268] bw ( KiB/s): min= 30, max= 349, per=29.54%, avg=91.86, stdev=60.05, samples=126 iops : min= 1, max= 21, avg= 4.98, stdev= 3.84, samples=126 write: IOPS=5, BW=82.9KiB/s (84.8kB/s)(6368KiB/76859msec); 0 zone resets clat (msec): min=40, max=606, avg=157.16, stdev=93.26 lat (msec): min=40, max=606, avg=157.17, stdev=93.26 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 69], 10.00th=[ 78], 20.00th=[ 93], | 30.00th=[ 108], 40.00th=[ 124], 50.00th=[ 131], 60.00th=[ 144], | 70.00th=[ 169], 80.00th=[ 201], 90.00th=[ 271], 95.00th=[ 363], | 99.00th=[ 584], 99.50th=[ 600], 99.90th=[ 609], 99.95th=[ 609], | 99.99th=[ 609] bw ( KiB/s): min= 30, max= 192, per=26.13%, avg=85.46, stdev=40.01, samples=146 iops : min= 1, max= 12, avg= 4.58, stdev= 2.64, samples=146 lat (msec) : 10=2.21%, 20=15.10%, 50=22.27%, 100=17.58%, 250=36.85% lat (msec) : 500=5.21%, 750=0.78% cpu : usr=0.04%, sys=1.06%, ctx=1220, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145116: Sat Sep 5 13:00:22 2026 read: IOPS=4, BW=74.9KiB/s (76.7kB/s)(5744KiB/76684msec) clat (msec): min=6, max=341, avg=38.60, stdev=38.42 lat (msec): min=6, max=341, avg=38.60, stdev=38.42 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 31], | 70.00th=[ 38], 80.00th=[ 51], 90.00th=[ 80], 95.00th=[ 106], | 99.00th=[ 207], 99.50th=[ 279], 99.90th=[ 342], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 22, max= 319, per=28.71%, avg=89.28, stdev=57.74, samples=127 iops : min= 1, max= 19, avg= 4.83, stdev= 3.66, samples=127 write: IOPS=5, BW=85.3KiB/s (87.4kB/s)(6544KiB/76684msec); 0 zone resets clat (msec): min=42, max=638, avg=152.54, stdev=84.76 lat (msec): min=42, max=638, avg=152.54, stdev=84.76 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 69], 10.00th=[ 79], 20.00th=[ 92], | 30.00th=[ 104], 40.00th=[ 117], 50.00th=[ 132], 60.00th=[ 146], | 70.00th=[ 165], 80.00th=[ 192], 90.00th=[ 247], 95.00th=[ 326], | 99.00th=[ 472], 99.50th=[ 523], 99.90th=[ 642], 99.95th=[ 642], | 99.99th=[ 642] bw ( KiB/s): min= 22, max= 160, per=26.38%, avg=86.26, stdev=38.94, samples=149 iops : min= 1, max= 10, avg= 4.63, stdev= 2.55, samples=149 lat (msec) : 10=1.69%, 20=13.93%, 50=22.14%, 100=20.57%, 250=36.46% lat (msec) : 500=4.69%, 750=0.52% cpu : usr=0.02%, sys=1.04%, ctx=1288, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145117: Sat Sep 5 13:00:22 2026 read: IOPS=5, BW=85.1KiB/s (87.1kB/s)(6256KiB/73507msec) clat (msec): min=6, max=242, avg=34.83, stdev=33.56 lat (msec): min=6, max=242, avg=34.84, stdev=33.56 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 28], | 70.00th=[ 35], 80.00th=[ 44], 90.00th=[ 72], 95.00th=[ 105], | 99.00th=[ 203], 99.50th=[ 211], 99.90th=[ 243], 99.95th=[ 243], | 99.99th=[ 243] bw ( KiB/s): min= 30, max= 318, per=31.79%, avg=98.88, stdev=67.86, samples=125 iops : min= 1, max= 19, avg= 5.43, stdev= 4.30, samples=125 write: IOPS=5, BW=82.1KiB/s (84.0kB/s)(6032KiB/73507msec); 0 zone resets clat (msec): min=49, max=607, avg=157.66, stdev=83.06 lat (msec): min=49, max=607, avg=157.67, stdev=83.06 clat percentiles (msec): | 1.00th=[ 61], 5.00th=[ 70], 10.00th=[ 81], 20.00th=[ 94], | 30.00th=[ 108], 40.00th=[ 121], 50.00th=[ 132], 60.00th=[ 157], | 70.00th=[ 176], 80.00th=[ 205], 90.00th=[ 271], 95.00th=[ 321], | 99.00th=[ 498], 99.50th=[ 600], 99.90th=[ 609], 99.95th=[ 609], | 99.99th=[ 609] bw ( KiB/s): min= 22, max= 192, per=25.91%, avg=84.73, stdev=37.09, samples=140 iops : min= 1, max= 12, avg= 4.53, stdev= 2.47, samples=140 lat (msec) : 10=2.86%, 20=17.32%, 50=22.27%, 100=16.67%, 250=34.51% lat (msec) : 500=5.99%, 750=0.39% cpu : usr=0.04%, sys=0.98%, ctx=1262, 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=145118: Sat Sep 5 13:00:22 2026 read: IOPS=4, BW=79.5KiB/s (81.4kB/s)(6032KiB/75891msec) clat (msec): min=5, max=275, avg=36.96, stdev=40.21 lat (msec): min=5, max=275, avg=36.96, stdev=40.21 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 34], 80.00th=[ 46], 90.00th=[ 88], 95.00th=[ 133], | 99.00th=[ 209], 99.50th=[ 247], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 30, max= 256, per=31.18%, avg=96.96, stdev=62.33, samples=121 iops : min= 1, max= 16, avg= 5.31, stdev= 4.00, samples=121 write: IOPS=5, BW=82.4KiB/s (84.4kB/s)(6256KiB/75891msec); 0 zone resets clat (msec): min=38, max=655, avg=158.27, stdev=87.22 lat (msec): min=38, max=655, avg=158.28, stdev=87.22 clat percentiles (msec): | 1.00th=[ 59], 5.00th=[ 71], 10.00th=[ 81], 20.00th=[ 93], | 30.00th=[ 110], 40.00th=[ 123], 50.00th=[ 136], 60.00th=[ 153], | 70.00th=[ 169], 80.00th=[ 194], 90.00th=[ 284], 95.00th=[ 347], | 99.00th=[ 468], 99.50th=[ 527], 99.90th=[ 659], 99.95th=[ 659], | 99.99th=[ 659] bw ( KiB/s): min= 30, max= 191, per=25.62%, avg=83.77, stdev=39.35, samples=146 iops : min= 1, max= 11, avg= 4.47, stdev= 2.59, samples=146 lat (msec) : 10=2.21%, 20=18.36%, 50=20.57%, 100=17.32%, 250=35.03% lat (msec) : 500=6.25%, 750=0.26% cpu : usr=0.03%, sys=1.06%, ctx=1315, 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=312KiB/s (319kB/s), 74.9KiB/s-85.1KiB/s (76.7kB/s-87.1kB/s), io=23.4MiB (24.5MB), run=73507-76859msec WRITE: bw=328KiB/s (336kB/s), 82.1KiB/s-85.3KiB/s (84.0kB/s-87.4kB/s), io=24.6MiB (25.8MB), run=73507-76859msec 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=145137: Sat Sep 5 13:00:39 2026 read: IOPS=1, BW=1196KiB/s (1225kB/s)(7168KiB/5991msec) clat (msec): min=73, max=2082, avg=443.85, stdev=727.63 lat (msec): min=73, max=2082, avg=443.85, stdev=727.63 clat percentiles (msec): | 1.00th=[ 74], 5.00th=[ 74], 10.00th=[ 74], 20.00th=[ 116], | 30.00th=[ 124], 40.00th=[ 124], 50.00th=[ 129], 60.00th=[ 284], | 70.00th=[ 284], 80.00th=[ 300], 90.00th=[ 2089], 95.00th=[ 2089], | 99.00th=[ 2089], 99.50th=[ 2089], 99.90th=[ 2089], 99.95th=[ 2089], | 99.99th=[ 2089] bw ( KiB/s): min= 2023, max= 5626, per=100.00%, avg=2933.00, stdev=1795.36, samples=4 iops : min= 1, max= 5, avg= 2.25, stdev= 1.89, samples=4 write: IOPS=0, BW=855KiB/s (875kB/s)(5120KiB/5991msec); 0 zone resets clat (msec): min=267, max=877, avg=566.82, stdev=270.33 lat (msec): min=267, max=877, avg=566.94, stdev=270.32 clat percentiles (msec): | 1.00th=[ 268], 5.00th=[ 268], 10.00th=[ 268], 20.00th=[ 268], | 30.00th=[ 342], 40.00th=[ 342], 50.00th=[ 542], 60.00th=[ 542], | 70.00th=[ 802], 80.00th=[ 802], 90.00th=[ 877], 95.00th=[ 877], | 99.00th=[ 877], 99.50th=[ 877], 99.90th=[ 877], 99.95th=[ 877], | 99.99th=[ 877] bw ( KiB/s): min= 2023, max= 4087, per=68.28%, avg=2715.00, stdev=1188.20, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 100=8.33%, 250=25.00%, 500=33.33%, 750=8.33%, 1000=16.67% lat (msec) : >=2000=8.33% cpu : usr=0.02%, sys=2.47%, ctx=62, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145138: Sat Sep 5 13:00:39 2026 read: IOPS=0, BW=284KiB/s (291kB/s)(2048KiB/7201msec) clat (msec): min=275, max=365, avg=320.51, stdev=62.96 lat (msec): min=275, max=365, avg=320.51, stdev=62.96 clat percentiles (msec): | 1.00th=[ 275], 5.00th=[ 275], 10.00th=[ 275], 20.00th=[ 275], | 30.00th=[ 275], 40.00th=[ 275], 50.00th=[ 275], 60.00th=[ 368], | 70.00th=[ 368], 80.00th=[ 368], 90.00th=[ 368], 95.00th=[ 368], | 99.00th=[ 368], 99.50th=[ 368], 99.90th=[ 368], 99.95th=[ 368], | 99.99th=[ 368] bw ( KiB/s): min= 1973, max= 2023, per=70.35%, avg=1998.00, stdev=35.36, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1422KiB/s (1456kB/s)(10.0MiB/7201msec); 0 zone resets clat (msec): min=184, max=2907, avg=647.54, stdev=809.69 lat (msec): min=184, max=2907, avg=647.83, stdev=809.67 clat percentiles (msec): | 1.00th=[ 184], 5.00th=[ 184], 10.00th=[ 184], 20.00th=[ 232], | 30.00th=[ 247], 40.00th=[ 351], 50.00th=[ 380], 60.00th=[ 384], | 70.00th=[ 567], 80.00th=[ 575], 90.00th=[ 651], 95.00th=[ 2903], | 99.00th=[ 2903], 99.50th=[ 2903], 99.90th=[ 2903], 99.95th=[ 2903], | 99.99th=[ 2903] bw ( KiB/s): min= 2019, max= 4071, per=65.80%, avg=2616.29, stdev=993.81, samples=7 iops : min= 1, max= 3, avg= 1.71, stdev= 0.95, samples=7 lat (msec) : 250=25.00%, 500=41.67%, 750=25.00%, >=2000=8.33% cpu : usr=0.06%, sys=3.46%, ctx=95, 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=145139: Sat Sep 5 13:00:39 2026 read: IOPS=0, BW=852KiB/s (873kB/s)(6144KiB/7210msec) clat (msec): min=109, max=1499, avg=463.71, stdev=538.66 lat (msec): min=109, max=1499, avg=463.71, stdev=538.66 clat percentiles (msec): | 1.00th=[ 110], 5.00th=[ 110], 10.00th=[ 110], 20.00th=[ 167], | 30.00th=[ 167], 40.00th=[ 197], 50.00th=[ 197], 60.00th=[ 199], | 70.00th=[ 617], 80.00th=[ 617], 90.00th=[ 1502], 95.00th=[ 1502], | 99.00th=[ 1502], 99.50th=[ 1502], 99.90th=[ 1502], 99.95th=[ 1502], | 99.99th=[ 1502] bw ( KiB/s): min= 2035, max= 4039, per=89.45%, avg=2540.25, stdev=999.18, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=852KiB/s (873kB/s)(6144KiB/7210msec); 0 zone resets clat (msec): min=235, max=2771, avg=729.36, stdev=1002.85 lat (msec): min=236, max=2771, avg=729.84, stdev=1002.65 clat percentiles (msec): | 1.00th=[ 236], 5.00th=[ 236], 10.00th=[ 236], 20.00th=[ 266], | 30.00th=[ 266], 40.00th=[ 326], 50.00th=[ 326], 60.00th=[ 342], | 70.00th=[ 435], 80.00th=[ 435], 90.00th=[ 2769], 95.00th=[ 2769], | 99.00th=[ 2769], 99.50th=[ 2769], 99.90th=[ 2769], 99.95th=[ 2769], | 99.99th=[ 2769] bw ( KiB/s): min= 2019, max= 4071, per=61.32%, avg=2438.20, stdev=912.81, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 250=41.67%, 500=33.33%, 750=8.33%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.47%, ctx=65, 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=145140: Sat Sep 5 13:00:39 2026 read: IOPS=0, BW=744KiB/s (762kB/s)(5120KiB/6884msec) clat (msec): min=112, max=441, avg=195.37, stdev=141.93 lat (msec): min=112, max=441, avg=195.37, stdev=141.93 clat percentiles (msec): | 1.00th=[ 113], 5.00th=[ 113], 10.00th=[ 113], 20.00th=[ 113], | 30.00th=[ 115], 40.00th=[ 115], 50.00th=[ 115], 60.00th=[ 115], | 70.00th=[ 192], 80.00th=[ 192], 90.00th=[ 443], 95.00th=[ 443], | 99.00th=[ 443], 99.50th=[ 443], 99.90th=[ 443], 99.95th=[ 443], | 99.99th=[ 443] bw ( KiB/s): min= 2023, max= 6119, per=100.00%, avg=4071.00, stdev=2896.31, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1041KiB/s (1066kB/s)(7168KiB/6884msec); 0 zone resets clat (msec): min=194, max=3574, avg=835.38, stdev=1225.15 lat (msec): min=194, max=3574, avg=835.57, stdev=1225.34 clat percentiles (msec): | 1.00th=[ 194], 5.00th=[ 194], 10.00th=[ 194], 20.00th=[ 266], | 30.00th=[ 305], 40.00th=[ 305], 50.00th=[ 326], 60.00th=[ 359], | 70.00th=[ 359], 80.00th=[ 827], 90.00th=[ 3574], 95.00th=[ 3574], | 99.00th=[ 3574], 99.50th=[ 3574], 99.90th=[ 3574], 99.95th=[ 3574], | 99.99th=[ 3574] bw ( KiB/s): min= 1992, max= 4096, per=61.23%, avg=2434.60, stdev=928.93, samples=5 iops : min= 1, max= 4, avg= 1.60, stdev= 1.34, samples=5 lat (msec) : 250=41.67%, 500=41.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=3.12%, ctx=82, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2840KiB/s (2909kB/s), 284KiB/s-1196KiB/s (291kB/s-1225kB/s), io=20.0MiB (20.0MB), run=5991-7210msec WRITE: bw=3977KiB/s (4072kB/s), 852KiB/s-1422KiB/s (873kB/s-1456kB/s), io=28.0MiB (29.4MB), run=5991-7210msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145142: Sat Sep 5 13:00:39 2026 read: IOPS=1, BW=1233KiB/s (1262kB/s)(7168KiB/5814msec) clat (usec): min=588, max=2284.4k, avg=525861.74, stdev=803952.53 lat (usec): min=589, max=2284.4k, avg=525862.96, stdev=803952.46 clat percentiles (usec): | 1.00th=[ 586], 5.00th=[ 586], 10.00th=[ 586], | 20.00th=[ 1385], 30.00th=[ 202376], 40.00th=[ 202376], | 50.00th=[ 238027], 60.00th=[ 333448], 70.00th=[ 333448], | 80.00th=[ 624952], 90.00th=[2298479], 95.00th=[2298479], | 99.00th=[2298479], 99.50th=[2298479], 99.90th=[2298479], | 99.95th=[2298479], 99.99th=[2298479] bw ( KiB/s): min= 1590, max= 2043, per=64.96%, avg=1872.17, stdev=168.26, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 write: IOPS=0, BW=881KiB/s (902kB/s)(5120KiB/5814msec); 0 zone resets clat (msec): min=148, max=682, avg=426.19, stdev=203.15 lat (msec): min=148, max=682, avg=426.33, stdev=203.17 clat percentiles (msec): | 1.00th=[ 148], 5.00th=[ 148], 10.00th=[ 148], 20.00th=[ 148], | 30.00th=[ 321], 40.00th=[ 321], 50.00th=[ 456], 60.00th=[ 456], | 70.00th=[ 527], 80.00th=[ 527], 90.00th=[ 684], 95.00th=[ 684], | 99.00th=[ 684], 99.50th=[ 684], 99.90th=[ 684], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 1505, max= 3856, per=60.54%, avg=2443.33, stdev=1245.21, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=8.33% lat (msec) : 2=8.33%, 250=25.00%, 500=25.00%, 750=25.00%, >=2000=8.33% cpu : usr=0.00%, sys=9.94%, ctx=446, 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=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=145143: Sat Sep 5 13:00:39 2026 read: IOPS=0, BW=288KiB/s (295kB/s)(2048KiB/7104msec) clat (msec): min=271, max=310, avg=291.16, stdev=27.47 lat (msec): min=271, max=310, avg=291.17, stdev=27.47 clat percentiles (msec): | 1.00th=[ 271], 5.00th=[ 271], 10.00th=[ 271], 20.00th=[ 271], | 30.00th=[ 271], 40.00th=[ 271], 50.00th=[ 271], 60.00th=[ 313], | 70.00th=[ 313], 80.00th=[ 313], 90.00th=[ 313], 95.00th=[ 313], | 99.00th=[ 313], 99.50th=[ 313], 99.90th=[ 313], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 1508, max= 2035, per=61.47%, avg=1771.50, stdev=372.65, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1441KiB/s (1476kB/s)(10.0MiB/7104msec); 0 zone resets clat (msec): min=249, max=2893, avg=651.93, stdev=837.70 lat (msec): min=249, max=2893, avg=652.04, stdev=837.69 clat percentiles (msec): | 1.00th=[ 249], 5.00th=[ 249], 10.00th=[ 249], 20.00th=[ 259], | 30.00th=[ 284], 40.00th=[ 288], 50.00th=[ 296], 60.00th=[ 330], | 70.00th=[ 334], 80.00th=[ 393], 90.00th=[ 1200], 95.00th=[ 2903], | 99.00th=[ 2903], 99.50th=[ 2903], 99.90th=[ 2903], 99.95th=[ 2903], | 99.99th=[ 2903] bw ( KiB/s): min= 1753, max= 4087, per=62.45%, avg=2520.29, stdev=997.60, samples=7 iops : min= 1, max= 3, avg= 1.57, stdev= 0.98, samples=7 lat (msec) : 250=8.33%, 500=75.00%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.95%, ctx=163, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145144: Sat Sep 5 13:00:39 2026 read: IOPS=1, BW=1116KiB/s (1143kB/s)(6144KiB/5504msec) clat (usec): min=759, max=367255, avg=150668.24, stdev=169076.55 lat (usec): min=761, max=367256, avg=150669.61, stdev=169076.67 clat percentiles (usec): | 1.00th=[ 758], 5.00th=[ 758], 10.00th=[ 758], 20.00th=[ 996], | 30.00th=[ 996], 40.00th=[ 4293], 50.00th=[ 4293], 60.00th=[223347], | 70.00th=[308282], 80.00th=[308282], 90.00th=[367002], 95.00th=[367002], | 99.00th=[367002], 99.50th=[367002], 99.90th=[367002], 99.95th=[367002], | 99.99th=[367002] bw ( KiB/s): min= 3011, max= 3506, per=100.00%, avg=3258.50, stdev=350.02, samples=2 iops : min= 2, max= 3, avg= 2.50, stdev= 0.71, samples=2 write: IOPS=1, BW=1116KiB/s (1143kB/s)(6144KiB/5504msec); 0 zone resets clat (msec): min=134, max=3367, avg=764.91, stdev=1282.58 lat (msec): min=135, max=3367, avg=765.46, stdev=1282.41 clat percentiles (msec): | 1.00th=[ 136], 5.00th=[ 136], 10.00th=[ 136], 20.00th=[ 163], | 30.00th=[ 163], 40.00th=[ 186], 50.00th=[ 186], 60.00th=[ 222], | 70.00th=[ 518], 80.00th=[ 518], 90.00th=[ 3373], 95.00th=[ 3373], | 99.00th=[ 3373], 99.50th=[ 3373], 99.90th=[ 3373], 99.95th=[ 3373], | 99.99th=[ 3373] bw ( KiB/s): min= 1556, max= 3506, per=58.33%, avg=2354.00, stdev=1022.06, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 1000=16.67% lat (msec) : 10=8.33%, 250=41.67%, 500=16.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.63%, ctx=177, 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=145145: Sat Sep 5 13:00:39 2026 read: IOPS=0, BW=971KiB/s (995kB/s)(5120KiB/5271msec) clat (usec): min=571, max=278691, avg=68426.62, stdev=120384.68 lat (usec): min=572, max=278691, avg=68427.70, stdev=120384.38 clat percentiles (usec): | 1.00th=[ 570], 5.00th=[ 570], 10.00th=[ 570], 20.00th=[ 570], | 30.00th=[ 709], 40.00th=[ 709], 50.00th=[ 1254], 60.00th=[ 1254], | 70.00th=[ 61080], 80.00th=[ 61080], 90.00th=[278922], 95.00th=[278922], | 99.00th=[278922], 99.50th=[278922], 99.90th=[278922], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 1753, max= 4517, per=100.00%, avg=3135.00, stdev=1954.44, samples=2 iops : min= 1, max= 4, avg= 2.50, stdev= 2.12, samples=2 write: IOPS=1, BW=1360KiB/s (1393kB/s)(7168KiB/5271msec); 0 zone resets clat (msec): min=128, max=2857, avg=703.88, stdev=959.98 lat (msec): min=129, max=2857, avg=703.96, stdev=959.98 clat percentiles (msec): | 1.00th=[ 129], 5.00th=[ 129], 10.00th=[ 129], 20.00th=[ 255], | 30.00th=[ 309], 40.00th=[ 309], 50.00th=[ 342], 60.00th=[ 502], | 70.00th=[ 502], 80.00th=[ 542], 90.00th=[ 2869], 95.00th=[ 2869], | 99.00th=[ 2869], 99.50th=[ 2869], 99.90th=[ 2869], 99.95th=[ 2869], | 99.99th=[ 2869] bw ( KiB/s): min= 1585, max= 3900, per=63.48%, avg=2562.25, stdev=1095.58, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 lat (usec) : 750=16.67% lat (msec) : 2=8.33%, 100=8.33%, 250=8.33%, 500=33.33%, 750=16.67% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=7.78%, ctx=128, 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=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=2883KiB/s (2952kB/s), 288KiB/s-1233KiB/s (295kB/s-1262kB/s), io=20.0MiB (20.0MB), run=5271-7104msec WRITE: bw=4036KiB/s (4133kB/s), 881KiB/s-1441KiB/s (902kB/s-1476kB/s), io=28.0MiB (29.4MB), run=5271-7104msec 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=145155: Sat Sep 5 13:01:00 2026 read: IOPS=0, BW=1786KiB/s (1829kB/s)(12.0MiB/6880msec) clat (msec): min=794, max=5194, avg=2278.87, stdev=2524.74 lat (msec): min=794, max=5194, avg=2278.87, stdev=2524.74 clat percentiles (msec): | 1.00th=[ 793], 5.00th=[ 793], 10.00th=[ 793], 20.00th=[ 793], | 30.00th=[ 793], 40.00th=[ 852], 50.00th=[ 852], 60.00th=[ 852], | 70.00th=[ 5201], 80.00th=[ 5201], 90.00th=[ 5201], 95.00th=[ 5201], | 99.00th=[ 5201], 99.50th=[ 5201], 99.90th=[ 5201], 99.95th=[ 5201], | 99.99th=[ 5201] bw ( KiB/s): min= 8143, max= 8159, per=100.00%, avg=8151.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=66.67%, >=2000=33.33% cpu : usr=0.01%, sys=1.12%, ctx=42, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145157: Sat Sep 5 13:01:00 2026 read: IOPS=0, BW=531KiB/s (544kB/s)(4096KiB/7716msec) clat (nsec): min=5628.2M, max=5628.2M, avg=5628189592.00, stdev= 0.00 lat (nsec): min=5628.2M, max=5628.2M, avg=5628192237.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 5604], 5.00th=[ 5604], 10.00th=[ 5604], 20.00th=[ 5604], | 30.00th=[ 5604], 40.00th=[ 5604], 50.00th=[ 5604], 60.00th=[ 5604], | 70.00th=[ 5604], 80.00th=[ 5604], 90.00th=[ 5604], 95.00th=[ 5604], | 99.00th=[ 5604], 99.50th=[ 5604], 99.90th=[ 5604], 99.95th=[ 5604], | 99.99th=[ 5604] bw ( KiB/s): min= 8126, max= 8126, per=100.00%, avg=8126.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1062KiB/s (1087kB/s)(8192KiB/7716msec); 0 zone resets clat (msec): min=508, max=1512, avg=1010.77, stdev=709.68 lat (msec): min=509, max=1512, avg=1011.47, stdev=709.20 clat percentiles (msec): | 1.00th=[ 510], 5.00th=[ 510], 10.00th=[ 510], 20.00th=[ 510], | 30.00th=[ 510], 40.00th=[ 510], 50.00th=[ 510], 60.00th=[ 1519], | 70.00th=[ 1519], 80.00th=[ 1519], 90.00th=[ 1519], 95.00th=[ 1519], | 99.00th=[ 1519], 99.50th=[ 1519], 99.90th=[ 1519], 99.95th=[ 1519], | 99.99th=[ 1519] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.00%, ctx=40, 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=145159: Sat Sep 5 13:01:00 2026 write: IOPS=0, BW=2034KiB/s (2083kB/s)(12.0MiB/6040msec); 0 zone resets clat (msec): min=682, max=4401, avg=1937.85, stdev=2133.78 lat (msec): min=683, max=4402, avg=1938.32, stdev=2133.88 clat percentiles (msec): | 1.00th=[ 684], 5.00th=[ 684], 10.00th=[ 684], 20.00th=[ 684], | 30.00th=[ 684], 40.00th=[ 726], 50.00th=[ 726], 60.00th=[ 726], | 70.00th=[ 4396], 80.00th=[ 4396], 90.00th=[ 4396], 95.00th=[ 4396], | 99.00th=[ 4396], 99.50th=[ 4396], 99.90th=[ 4396], 99.95th=[ 4396], | 99.99th=[ 4396] bw ( KiB/s): min= 8126, max= 8192, per=100.00%, avg=8159.00, stdev=46.67, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=1.87%, ctx=53, majf=0, minf=9 rand-rw: (groupid=0, jobs=1): err= 0: pid=145153: Sat Sep 5 13:01:00 2026 read: IOPS=0, BW=1848KiB/s (1892kB/s)(12.0MiB/6651msec) clat (msec): min=760, max=4924, avg=2181.50, stdev=2376.41 lat (msec): min=760, max=4924, avg=2181.50, stdev=2376.41 clat percentiles (msec): | 1.00th=[ 760], 5.00th=[ 760], 10.00th=[ 760], 20.00th=[ 760], | 30.00th=[ 760], 40.00th=[ 860], 50.00th=[ 860], 60.00th=[ 860], | 70.00th=[ 4933], 80.00th=[ 4933], 90.00th=[ 4933], 95.00th=[ 4933], | 99.00th=[ 4933], 99.50th=[ 4933], 99.90th=[ 4933], 99.95th=[ 4933], | 99.99th=[ 4933] bw ( KiB/s): min= 8047, max= 8110, per=100.00%, avg=8078.50, stdev=44.55, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=5.25%, ctx=422, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145154: Sat Sep 5 13:01:00 2026 read: IOPS=0, BW=567KiB/s (581kB/s)(4096KiB/7218msec) clat (nsec): min=4629.3M, max=4629.3M, avg=4629338178.00, stdev= 0.00 lat (nsec): min=4629.3M, max=4629.3M, avg=4629341012.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 4597], 5.00th=[ 4597], 10.00th=[ 4597], 20.00th=[ 4597], | 30.00th=[ 4597], 40.00th=[ 4597], 50.00th=[ 4597], 60.00th=[ 4597], | 70.00th=[ 4597], 80.00th=[ 4597], 90.00th=[ 4597], 95.00th=[ 4597], | 99.00th=[ 4597], 99.50th=[ 4597], 99.90th=[ 4597], 99.95th=[ 4597], | 99.99th=[ 4597] bw ( KiB/s): min= 8078, max= 8078, per=100.00%, avg=8078.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1135KiB/s (1162kB/s)(8192KiB/7218msec); 0 zone resets clat (msec): min=507, max=1901, avg=1204.20, stdev=985.77 lat (msec): min=507, max=1901, avg=1204.64, stdev=985.77 clat percentiles (msec): | 1.00th=[ 506], 5.00th=[ 506], 10.00th=[ 506], 20.00th=[ 506], | 30.00th=[ 506], 40.00th=[ 506], 50.00th=[ 506], 60.00th=[ 1905], | 70.00th=[ 1905], 80.00th=[ 1905], 90.00th=[ 1905], 95.00th=[ 1905], | 99.00th=[ 1905], 99.50th=[ 1905], 99.90th=[ 1905], 99.95th=[ 1905], | 99.99th=[ 1905] bw ( KiB/s): min= 8110, max= 8110, per=100.00%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=4.53%, ctx=554, 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=145156: Sat Sep 5 13:01:00 2026 write: IOPS=0, BW=1577KiB/s (1614kB/s)(12.0MiB/7794msec); 0 zone resets clat (msec): min=490, max=6081, avg=2568.96, stdev=3059.36 lat (msec): min=490, max=6082, avg=2569.31, stdev=3059.37 clat percentiles (msec): | 1.00th=[ 489], 5.00th=[ 489], 10.00th=[ 489], 20.00th=[ 489], | 30.00th=[ 489], 40.00th=[ 1133], 50.00th=[ 1133], 60.00th=[ 1133], | 70.00th=[ 6074], 80.00th=[ 6074], 90.00th=[ 6074], 95.00th=[ 6074], | 99.00th=[ 6074], 99.50th=[ 6074], 99.90th=[ 6074], 99.95th=[ 6074], | 99.99th=[ 6074] bw ( KiB/s): min= 8078, max= 8110, per=100.00%, avg=8094.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.18%, ctx=61, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145160: Sat Sep 5 13:01:00 2026 write: IOPS=0, BW=1802KiB/s (1846kB/s)(12.0MiB/6818msec); 0 zone resets clat (msec): min=624, max=3832, avg=2246.60, stdev=1604.69 lat (msec): min=624, max=3833, avg=2247.22, stdev=1605.06 clat percentiles (msec): | 1.00th=[ 625], 5.00th=[ 625], 10.00th=[ 625], 20.00th=[ 625], | 30.00th=[ 625], 40.00th=[ 2299], 50.00th=[ 2299], 60.00th=[ 2299], | 70.00th=[ 3842], 80.00th=[ 3842], 90.00th=[ 3842], 95.00th=[ 3842], | 99.00th=[ 3842], 99.50th=[ 3842], 99.90th=[ 3842], 99.95th=[ 3842], | 99.99th=[ 3842] bw ( KiB/s): min= 8126, max= 8159, per=100.00%, avg=8142.50, stdev=23.33, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, >=2000=66.67% cpu : usr=0.00%, sys=1.55%, ctx=40, 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=2123KiB/s (2174kB/s), 531KiB/s-1786KiB/s (544kB/s-1829kB/s), io=16.0MiB (16.8MB), run=6880-7716msec WRITE: bw=4247KiB/s (4349kB/s), 1062KiB/s-2034KiB/s (1087kB/s-2083kB/s), io=32.0MiB (33.6MB), run=6040-7716msec 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=145158: Sat Sep 5 13:01:00 2026 write: IOPS=0, BW=1847KiB/s (1891kB/s)(12.0MiB/6654msec); 0 zone resets clat (msec): min=421, max=3786, avg=2185.63, stdev=1688.50 lat (msec): min=422, max=3788, avg=2186.86, stdev=1689.10 clat percentiles (msec): | 1.00th=[ 422], 5.00th=[ 422], 10.00th=[ 422], 20.00th=[ 422], | 30.00th=[ 422], 40.00th=[ 2333], 50.00th=[ 2333], 60.00th=[ 2333], | 70.00th=[ 3775], 80.00th=[ 3775], 90.00th=[ 3775], 95.00th=[ 3775], | 99.00th=[ 3775], 99.50th=[ 3775], 99.90th=[ 3775], 99.95th=[ 3775], | 99.99th=[ 3775] bw ( KiB/s): min= 7801, max= 8143, per=100.00%, avg=7972.00, stdev=241.83, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, >=2000=66.67% cpu : usr=0.00%, sys=1.64%, ctx=45, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=2270KiB/s (2324kB/s), 567KiB/s-1848KiB/s (581kB/s-1892kB/s), io=16.0MiB (16.8MB), run=6651-7218msec WRITE: bw=4204KiB/s (4305kB/s), 1135KiB/s-1847KiB/s (1162kB/s-1891kB/s), io=32.0MiB (33.6MB), run=6654-7794msec