== sanity test 398b: DIO and buffer IO race ============== 20:16:27 (1788740187) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 4.85552 s, 10.4 MB/s mix direct rw 4096 by fio with 4 jobs... mix buffer rw 4096 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=154272: Sun Sep 6 20:18:44 2026 read: IOPS=12, BW=49.5KiB/s (50.7kB/s)(5992KiB/120983msec) clat (usec): min=31, max=910991, avg=39315.19, stdev=48309.76 lat (usec): min=31, max=910992, avg=39316.89, stdev=48309.67 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 54], 10.00th=[ 68], 20.00th=[ 14353], | 30.00th=[ 20579], 40.00th=[ 25297], 50.00th=[ 30540], 60.00th=[ 36963], | 70.00th=[ 45351], 80.00th=[ 56886], 90.00th=[ 78119], 95.00th=[ 98042], | 99.00th=[154141], 99.50th=[235930], 99.90th=[843056], 99.95th=[910164], | 99.99th=[910164] bw ( KiB/s): min= 7, max= 110, per=25.31%, avg=49.86, stdev=23.94, samples=235 iops : min= 1, max= 27, avg=11.85, stdev= 6.03, samples=235 write: IOPS=13, BW=52.0KiB/s (53.3kB/s)(6296KiB/120983msec); 0 zone resets clat (usec): min=613, max=453161, avg=39220.63, stdev=46827.06 lat (usec): min=614, max=453163, avg=39230.07, stdev=46821.79 clat percentiles (usec): | 1.00th=[ 979], 5.00th=[ 1123], 10.00th=[ 1270], 20.00th=[ 3130], | 30.00th=[ 6652], 40.00th=[ 15533], 50.00th=[ 26084], 60.00th=[ 35914], | 70.00th=[ 48497], 80.00th=[ 67634], 90.00th=[ 94897], 95.00th=[121111], | 99.00th=[221250], 99.50th=[283116], 99.90th=[408945], 99.95th=[455082], | 99.99th=[455082] bw ( KiB/s): min= 7, max= 152, per=25.54%, avg=52.62, stdev=27.43, samples=234 iops : min= 1, max= 38, avg=12.54, stdev= 6.92, samples=234 lat (usec) : 50=1.14%, 100=4.79%, 250=0.42%, 500=0.07%, 750=0.10% lat (usec) : 1000=0.52% lat (msec) : 2=7.49%, 4=3.55%, 10=6.74%, 20=11.95%, 50=35.90% lat (msec) : 100=20.44%, 250=6.41%, 500=0.39%, 750=0.03%, 1000=0.07% cpu : usr=0.06%, sys=5.25%, ctx=6091, 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=154274: Sun Sep 6 20:18:44 2026 read: IOPS=12, BW=48.9KiB/s (50.0kB/s)(5940KiB/121568msec) clat (usec): min=22, max=906672, avg=37362.37, stdev=46817.89 lat (usec): min=22, max=906674, avg=37364.07, stdev=46818.12 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 56], 10.00th=[ 65], 20.00th=[ 14877], | 30.00th=[ 19006], 40.00th=[ 23725], 50.00th=[ 28181], 60.00th=[ 33817], | 70.00th=[ 42206], 80.00th=[ 53740], 90.00th=[ 71828], 95.00th=[ 91751], | 99.00th=[183501], 99.50th=[283116], 99.90th=[583009], 99.95th=[910164], | 99.99th=[910164] bw ( KiB/s): min= 6, max= 119, per=25.49%, avg=50.22, stdev=24.45, samples=231 iops : min= 1, max= 29, avg=11.94, stdev= 6.17, samples=231 write: IOPS=13, BW=52.2KiB/s (53.5kB/s)(6348KiB/121568msec); 0 zone resets clat (usec): min=665, max=959628, avg=41422.26, stdev=51920.65 lat (usec): min=666, max=959629, avg=41424.85, stdev=51921.23 clat percentiles (usec): | 1.00th=[ 988], 5.00th=[ 1123], 10.00th=[ 1205], 20.00th=[ 2540], | 30.00th=[ 7242], 40.00th=[ 17171], 50.00th=[ 27657], 60.00th=[ 39060], | 70.00th=[ 51643], 80.00th=[ 68682], 90.00th=[ 99091], 95.00th=[128451], | 99.00th=[225444], 99.50th=[256902], 99.90th=[346031], 99.95th=[960496], | 99.99th=[960496] bw ( KiB/s): min= 7, max= 182, per=25.61%, avg=52.75, stdev=28.55, samples=235 iops : min= 1, max= 45, avg=12.57, stdev= 7.21, samples=235 lat (usec) : 50=1.20%, 100=4.82%, 250=0.29%, 500=0.10%, 750=0.10% lat (usec) : 1000=0.65% lat (msec) : 2=8.33%, 4=3.65%, 10=5.21%, 20=13.22%, 50=35.38% lat (msec) : 100=20.18%, 250=6.28%, 500=0.46%, 750=0.07%, 1000=0.07% cpu : usr=0.07%, sys=5.28%, ctx=6203, 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=154275: Sun Sep 6 20:18:44 2026 read: IOPS=12, BW=49.6KiB/s (50.8kB/s)(6028KiB/121574msec) clat (usec): min=21, max=858642, avg=37075.26, stdev=41280.61 lat (usec): min=21, max=858643, avg=37077.21, stdev=41282.00 clat percentiles (usec): | 1.00th=[ 44], 5.00th=[ 55], 10.00th=[ 63], 20.00th=[ 14353], | 30.00th=[ 19792], 40.00th=[ 23987], 50.00th=[ 29492], 60.00th=[ 35914], | 70.00th=[ 43254], 80.00th=[ 54789], 90.00th=[ 71828], 95.00th=[ 90702], | 99.00th=[147850], 99.50th=[200279], 99.90th=[557843], 99.95th=[859833], | 99.99th=[859833] bw ( KiB/s): min= 7, max= 126, per=25.31%, avg=49.86, stdev=26.56, samples=236 iops : min= 1, max= 31, avg=11.85, stdev= 6.68, samples=236 write: IOPS=12, BW=51.5KiB/s (52.7kB/s)(6260KiB/121574msec); 0 zone resets clat (usec): min=694, max=1149.7k, avg=41740.26, stdev=54368.86 lat (usec): min=695, max=1149.7k, avg=41746.34, stdev=54370.32 clat percentiles (usec): | 1.00th=[ 996], 5.00th=[ 1106], 10.00th=[ 1254], | 20.00th=[ 3556], 30.00th=[ 8979], 40.00th=[ 18220], | 50.00th=[ 28443], 60.00th=[ 38536], 70.00th=[ 52167], | 80.00th=[ 70779], 90.00th=[ 95945], 95.00th=[ 128451], | 99.00th=[ 196084], 99.50th=[ 295699], 99.90th=[ 526386], | 99.95th=[1149240], 99.99th=[1149240] bw ( KiB/s): min= 7, max= 159, per=25.19%, avg=51.89, stdev=25.97, samples=235 iops : min= 1, max= 39, avg=12.37, stdev= 6.54, samples=235 lat (usec) : 50=1.01%, 100=4.92%, 250=0.16%, 500=0.10%, 750=0.13% lat (usec) : 1000=0.52% lat (msec) : 2=7.45%, 4=3.03%, 10=5.57%, 20=13.38%, 50=36.43% lat (msec) : 100=20.74%, 250=6.15%, 500=0.29%, 750=0.07%, 1000=0.03% lat (msec) : 2000=0.03% cpu : usr=0.07%, sys=5.39%, ctx=6311, 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=154276: Sun Sep 6 20:18:44 2026 read: IOPS=12, BW=50.1KiB/s (51.3kB/s)(6052KiB/120719msec) clat (usec): min=25, max=999333, avg=37516.12, stdev=47674.99 lat (usec): min=25, max=999334, avg=37522.59, stdev=47677.01 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 55], 10.00th=[ 63], | 20.00th=[ 13042], 30.00th=[ 17957], 40.00th=[ 23200], | 50.00th=[ 27919], 60.00th=[ 34866], 70.00th=[ 43254], | 80.00th=[ 54789], 90.00th=[ 76022], 95.00th=[ 99091], | 99.00th=[ 175113], 99.50th=[ 219153], 99.90th=[ 884999], | 99.95th=[1002439], 99.99th=[1002439] bw ( KiB/s): min= 7, max= 152, per=25.84%, avg=50.90, stdev=28.14, samples=232 iops : min= 1, max= 38, avg=12.11, stdev= 7.09, samples=232 write: IOPS=12, BW=51.7KiB/s (52.9kB/s)(6236KiB/120719msec); 0 zone resets clat (usec): min=726, max=936102, avg=40730.56, stdev=51977.68 lat (usec): min=728, max=936103, avg=40733.88, stdev=51976.49 clat percentiles (usec): | 1.00th=[ 996], 5.00th=[ 1123], 10.00th=[ 1237], 20.00th=[ 2933], | 30.00th=[ 7046], 40.00th=[ 16712], 50.00th=[ 26346], 60.00th=[ 38011], | 70.00th=[ 50594], 80.00th=[ 70779], 90.00th=[ 98042], 95.00th=[123208], | 99.00th=[200279], 99.50th=[274727], 99.90th=[641729], 99.95th=[935330], | 99.99th=[935330] bw ( KiB/s): min= 7, max= 144, per=25.45%, avg=52.43, stdev=26.99, samples=232 iops : min= 1, max= 36, avg=12.49, stdev= 6.79, samples=232 lat (usec) : 50=1.27%, 100=4.95%, 250=0.46%, 500=0.23%, 750=0.10% lat (usec) : 1000=0.49% lat (msec) : 2=7.85%, 4=3.35%, 10=6.18%, 20=13.83%, 50=33.98% lat (msec) : 100=20.02%, 250=6.80%, 500=0.36%, 750=0.03%, 1000=0.10% cpu : usr=0.07%, sys=5.22%, ctx=6144, 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=198KiB/s (202kB/s), 48.9KiB/s-50.1KiB/s (50.0kB/s-51.3kB/s), io=23.4MiB (24.6MB), run=120719-121574msec WRITE: bw=207KiB/s (212kB/s), 51.5KiB/s-52.2KiB/s (52.7kB/s-53.5kB/s), io=24.6MiB (25.7MB), run=120719-121574msec rand-rw: (groupid=0, jobs=1): err= 0: pid=154277: Sun Sep 6 20:20:36 2026 read: IOPS=6, BW=25.9KiB/s (26.5kB/s)(5992KiB/231259msec) clat (msec): min=4, max=457, avg=30.75, stdev=36.21 lat (msec): min=4, max=457, avg=30.75, stdev=36.21 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 7], 10.00th=[ 9], 20.00th=[ 11], | 30.00th=[ 13], 40.00th=[ 16], 50.00th=[ 18], 60.00th=[ 22], | 70.00th=[ 28], 80.00th=[ 41], 90.00th=[ 73], 95.00th=[ 101], | 99.00th=[ 176], 99.50th=[ 226], 99.90th=[ 368], 99.95th=[ 460], | 99.99th=[ 460] bw ( KiB/s): min= 6, max= 120, per=28.33%, avg=28.90, stdev=21.09, samples=403 iops : min= 1, max= 30, avg= 6.63, stdev= 5.33, samples=403 write: IOPS=6, BW=27.2KiB/s (27.9kB/s)(6296KiB/231259msec); 0 zone resets clat (msec): min=30, max=1802, avg=117.46, stdev=86.60 lat (msec): min=30, max=1802, avg=117.46, stdev=86.61 clat percentiles (msec): | 1.00th=[ 39], 5.00th=[ 47], 10.00th=[ 54], 20.00th=[ 65], | 30.00th=[ 74], 40.00th=[ 84], 50.00th=[ 94], 60.00th=[ 108], | 70.00th=[ 128], 80.00th=[ 157], 90.00th=[ 207], 95.00th=[ 266], | 99.00th=[ 384], 99.50th=[ 418], 99.90th=[ 1062], 99.95th=[ 1804], | 99.99th=[ 1804] bw ( KiB/s): min= 6, max= 64, per=25.50%, avg=27.28, stdev=14.87, samples=447 iops : min= 1, max= 16, avg= 6.21, stdev= 3.81, samples=447 lat (msec) : 10=9.34%, 20=17.97%, 50=17.09%, 100=29.82%, 250=22.40% lat (msec) : 500=3.22%, 750=0.07%, 1000=0.03%, 2000=0.07% cpu : usr=0.03%, sys=1.18%, ctx=5331, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=154278: Sun Sep 6 20:20:36 2026 read: IOPS=6, BW=25.4KiB/s (26.0kB/s)(5940KiB/233592msec) clat (msec): min=4, max=557, avg=30.42, stdev=37.35 lat (msec): min=4, max=557, avg=30.42, stdev=37.35 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 7], 10.00th=[ 9], 20.00th=[ 11], | 30.00th=[ 13], 40.00th=[ 15], 50.00th=[ 18], 60.00th=[ 22], | 70.00th=[ 28], 80.00th=[ 41], 90.00th=[ 69], 95.00th=[ 100], | 99.00th=[ 178], 99.50th=[ 199], 99.90th=[ 380], 99.95th=[ 558], | 99.99th=[ 558] bw ( KiB/s): min= 6, max= 111, per=28.63%, avg=29.20, stdev=20.33, samples=395 iops : min= 1, max= 27, avg= 6.70, stdev= 5.14, samples=395 write: IOPS=6, BW=27.2KiB/s (27.8kB/s)(6348KiB/233592msec); 0 zone resets clat (msec): min=26, max=1218, avg=118.53, stdev=84.12 lat (msec): min=26, max=1218, avg=118.54, stdev=84.12 clat percentiles (msec): | 1.00th=[ 36], 5.00th=[ 49], 10.00th=[ 55], 20.00th=[ 65], | 30.00th=[ 74], 40.00th=[ 84], 50.00th=[ 95], 60.00th=[ 109], | 70.00th=[ 127], 80.00th=[ 157], 90.00th=[ 209], 95.00th=[ 266], | 99.00th=[ 422], 99.50th=[ 489], 99.90th=[ 1167], 99.95th=[ 1217], | 99.99th=[ 1217] bw ( KiB/s): min= 6, max= 79, per=25.50%, avg=27.28, stdev=14.75, samples=451 iops : min= 1, max= 19, avg= 6.21, stdev= 3.76, samples=451 lat (msec) : 10=8.79%, 20=18.39%, 50=16.50%, 100=29.88%, 250=23.14% lat (msec) : 500=3.03%, 750=0.16%, 1000=0.03%, 2000=0.07% cpu : usr=0.04%, sys=1.21%, ctx=5375, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=154279: Sun Sep 6 20:20:36 2026 read: IOPS=6, BW=25.8KiB/s (26.5kB/s)(6028KiB/233207msec) clat (msec): min=4, max=544, avg=33.25, stdev=39.51 lat (msec): min=4, max=544, avg=33.25, stdev=39.51 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 7], 10.00th=[ 9], 20.00th=[ 11], | 30.00th=[ 13], 40.00th=[ 16], 50.00th=[ 20], 60.00th=[ 24], | 70.00th=[ 31], 80.00th=[ 47], 90.00th=[ 79], 95.00th=[ 110], | 99.00th=[ 182], 99.50th=[ 241], 99.90th=[ 368], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 7, max= 111, per=28.18%, avg=28.74, stdev=19.68, samples=407 iops : min= 1, max= 27, avg= 6.58, stdev= 4.98, samples=407 write: IOPS=6, BW=26.8KiB/s (27.5kB/s)(6260KiB/233207msec); 0 zone resets clat (msec): min=29, max=1053, avg=116.76, stdev=80.67 lat (msec): min=29, max=1053, avg=116.77, stdev=80.67 clat percentiles (msec): | 1.00th=[ 39], 5.00th=[ 48], 10.00th=[ 55], 20.00th=[ 65], | 30.00th=[ 74], 40.00th=[ 83], 50.00th=[ 94], 60.00th=[ 107], | 70.00th=[ 125], 80.00th=[ 153], 90.00th=[ 205], 95.00th=[ 257], | 99.00th=[ 414], 99.50th=[ 502], 99.90th=[ 978], 99.95th=[ 1053], | 99.99th=[ 1053] bw ( KiB/s): min= 6, max= 63, per=25.25%, avg=27.01, stdev=14.79, samples=449 iops : min= 1, max= 15, avg= 6.14, stdev= 3.79, samples=449 lat (msec) : 10=8.95%, 20=16.86%, 50=17.32%, 100=30.83%, 250=23.05% lat (msec) : 500=2.70%, 750=0.23%, 1000=0.03%, 2000=0.03% cpu : usr=0.03%, sys=1.19%, ctx=5292, 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=154280: Sun Sep 6 20:20:36 2026 read: IOPS=6, BW=26.2KiB/s (26.8kB/s)(6052KiB/231264msec) clat (msec): min=4, max=895, avg=31.17, stdev=42.41 lat (msec): min=4, max=895, avg=31.17, stdev=42.41 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 7], 10.00th=[ 9], 20.00th=[ 11], | 30.00th=[ 13], 40.00th=[ 15], 50.00th=[ 18], 60.00th=[ 22], | 70.00th=[ 29], 80.00th=[ 44], 90.00th=[ 68], 95.00th=[ 103], | 99.00th=[ 199], 99.50th=[ 228], 99.90th=[ 359], 99.95th=[ 894], | 99.99th=[ 894] bw ( KiB/s): min= 7, max= 120, per=28.80%, avg=29.37, stdev=21.41, samples=400 iops : min= 1, max= 30, avg= 6.73, stdev= 5.44, samples=400 write: IOPS=6, BW=26.0KiB/s (27.6kB/s)(6236KiB/231264msec); 0 zone resets clat (msec): min=30, max=1132, avg=117.93, stdev=79.52 lat (msec): min=30, max=1132, avg=117.94, stdev=79.52 clat percentiles (msec): | 1.00th=[ 39], 5.00th=[ 47], 10.00th=[ 55], 20.00th=[ 64], | 30.00th=[ 75], 40.00th=[ 85], 50.00th=[ 95], 60.00th=[ 109], | 70.00th=[ 127], 80.00th=[ 157], 90.00th=[ 207], 95.00th=[ 271], | 99.00th=[ 401], 99.50th=[ 502], 99.90th=[ 709], 99.95th=[ 1133], | 99.99th=[ 1133] bw ( KiB/s): min= 7, max= 71, per=25.35%, avg=27.12, stdev=14.66, samples=445 iops : min= 1, max= 17, avg= 6.17, stdev= 3.75, samples=445 lat (msec) : 10=9.47%, 20=18.52%, 50=16.44%, 100=29.46%, 250=22.75% lat (msec) : 500=3.03%, 750=0.26%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.18%, ctx=5372, 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=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=103KiB/s (105kB/s), 25.4KiB/s-26.2KiB/s (26.0kB/s-26.8kB/s), io=23.4MiB (24.6MB), run=231259-233592msec WRITE: bw=108KiB/s (110kB/s), 26.8KiB/s-27.2KiB/s (27.5kB/s-27.9kB/s), io=24.6MiB (25.7MB), run=231259-233592msec 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=154331: Sun Sep 6 20:21:06 2026 read: IOPS=17, BW=280KiB/s (287kB/s)(5920KiB/21109msec) clat (usec): min=21, max=167818, avg=28872.19, stdev=26253.65 lat (usec): min=21, max=167820, avg=28873.33, stdev=26253.70 clat percentiles (usec): | 1.00th=[ 26], 5.00th=[ 47], 10.00th=[ 59], 20.00th=[ 70], | 30.00th=[ 16057], 40.00th=[ 21365], 50.00th=[ 26346], 60.00th=[ 33424], | 70.00th=[ 39060], 80.00th=[ 45876], 90.00th=[ 56361], 95.00th=[ 68682], | 99.00th=[137364], 99.50th=[147850], 99.90th=[168821], 99.95th=[168821], | 99.99th=[168821] bw ( KiB/s): min= 63, max= 541, per=24.92%, avg=278.39, stdev=88.83, samples=41 iops : min= 3, max= 33, avg=16.63, stdev= 5.58, samples=41 write: IOPS=18, BW=302KiB/s (309kB/s)(6368KiB/21109msec); 0 zone resets clat (usec): min=997, max=292095, avg=26092.93, stdev=29805.38 lat (usec): min=999, max=292097, avg=26097.26, stdev=29807.47 clat percentiles (usec): | 1.00th=[ 1418], 5.00th=[ 1598], 10.00th=[ 1876], 20.00th=[ 3523], | 30.00th=[ 6063], 40.00th=[ 10028], 50.00th=[ 16909], 60.00th=[ 24249], | 70.00th=[ 33817], 80.00th=[ 43779], 90.00th=[ 62653], 95.00th=[ 77071], | 99.00th=[124257], 99.50th=[158335], 99.90th=[291505], 99.95th=[291505], | 99.99th=[291505] bw ( KiB/s): min= 94, max= 509, per=25.69%, avg=301.80, stdev=105.49, samples=41 iops : min= 5, max= 31, avg=18.10, stdev= 6.62, samples=41 lat (usec) : 50=2.86%, 100=9.38%, 250=0.52%, 500=0.13%, 1000=0.13% lat (msec) : 2=5.60%, 4=6.38%, 10=9.38%, 20=11.72%, 50=38.02% lat (msec) : 100=13.28%, 250=2.47%, 500=0.13% cpu : usr=0.06%, sys=7.31%, ctx=1379, 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=154332: Sun Sep 6 20:21:06 2026 read: IOPS=16, BW=268KiB/s (274kB/s)(5744KiB/21436msec) clat (usec): min=36, max=152432, avg=30341.45, stdev=25308.14 lat (usec): min=36, max=152434, avg=30342.78, stdev=25308.34 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 55], 10.00th=[ 61], 20.00th=[ 82], | 30.00th=[ 16581], 40.00th=[ 23462], 50.00th=[ 27657], 60.00th=[ 34341], | 70.00th=[ 40633], 80.00th=[ 49546], 90.00th=[ 62653], 95.00th=[ 71828], | 99.00th=[107480], 99.50th=[122160], 99.90th=[152044], 99.95th=[152044], | 99.99th=[152044] bw ( KiB/s): min= 59, max= 541, per=24.47%, avg=273.29, stdev=103.96, samples=41 iops : min= 3, max= 33, avg=16.34, stdev= 6.45, samples=41 write: IOPS=19, BW=305KiB/s (313kB/s)(6544KiB/21436msec); 0 zone resets clat (usec): min=993, max=245161, avg=25664.96, stdev=31788.82 lat (usec): min=994, max=245165, avg=25667.17, stdev=31788.98 clat percentiles (usec): | 1.00th=[ 1319], 5.00th=[ 1614], 10.00th=[ 1795], 20.00th=[ 2606], | 30.00th=[ 5080], 40.00th=[ 8160], 50.00th=[ 13960], 60.00th=[ 22152], | 70.00th=[ 30802], 80.00th=[ 44827], 90.00th=[ 63701], 95.00th=[ 80217], | 99.00th=[143655], 99.50th=[177210], 99.90th=[244319], 99.95th=[244319], | 99.99th=[244319] bw ( KiB/s): min= 94, max= 512, per=25.85%, avg=303.74, stdev=109.96, samples=42 iops : min= 5, max= 32, avg=18.26, stdev= 6.93, samples=42 lat (usec) : 50=1.82%, 100=8.33%, 250=0.39%, 750=0.39%, 1000=0.26% lat (msec) : 2=7.29%, 4=6.51%, 10=10.29%, 20=11.85%, 50=34.90% lat (msec) : 100=15.76%, 250=2.21% cpu : usr=0.10%, sys=7.34%, ctx=1383, 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=154333: Sun Sep 6 20:21:06 2026 read: IOPS=18, BW=293KiB/s (300kB/s)(6256KiB/21368msec) clat (usec): min=35, max=245830, avg=29132.27, stdev=26836.27 lat (usec): min=35, max=245831, avg=29139.99, stdev=26846.22 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 51], 10.00th=[ 58], 20.00th=[ 75], | 30.00th=[ 14091], 40.00th=[ 20841], 50.00th=[ 26870], 60.00th=[ 33817], | 70.00th=[ 39584], 80.00th=[ 46924], 90.00th=[ 62653], 95.00th=[ 74974], | 99.00th=[107480], 99.50th=[128451], 99.90th=[246416], 99.95th=[246416], | 99.99th=[246416] bw ( KiB/s): min= 95, max= 604, per=26.30%, avg=293.81, stdev=108.59, samples=42 iops : min= 5, max= 37, avg=17.64, stdev= 6.79, samples=42 write: IOPS=17, BW=282KiB/s (289kB/s)(6032KiB/21368msec); 0 zone resets clat (usec): min=922, max=223615, avg=26367.03, stdev=28285.12 lat (usec): min=923, max=223616, avg=26392.76, stdev=28268.72 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1598], 10.00th=[ 1795], 20.00th=[ 3458], | 30.00th=[ 6521], 40.00th=[ 10552], 50.00th=[ 15926], 60.00th=[ 24511], | 70.00th=[ 34866], 80.00th=[ 49021], 90.00th=[ 64226], 95.00th=[ 76022], | 99.00th=[127402], 99.50th=[147850], 99.90th=[223347], 99.95th=[223347], | 99.99th=[223347] bw ( KiB/s): min= 126, max= 479, per=23.94%, avg=281.33, stdev=83.74, samples=42 iops : min= 7, max= 29, avg=16.86, stdev= 5.22, samples=42 lat (usec) : 50=2.47%, 100=9.38%, 250=0.39%, 500=0.39%, 750=0.26% lat (usec) : 1000=0.13% lat (msec) : 2=6.25%, 4=4.69%, 10=8.72%, 20=15.36%, 50=34.38% lat (msec) : 100=15.89%, 250=1.69% cpu : usr=0.09%, sys=7.12%, ctx=1419, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=154334: Sun Sep 6 20:21:06 2026 read: IOPS=17, BW=283KiB/s (289kB/s)(6032KiB/21345msec) clat (usec): min=36, max=218910, avg=28122.49, stdev=25719.82 lat (usec): min=36, max=218911, avg=28123.53, stdev=25719.81 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 56], 10.00th=[ 61], 20.00th=[ 72], | 30.00th=[ 16581], 40.00th=[ 21627], 50.00th=[ 26084], 60.00th=[ 29754], | 70.00th=[ 34866], 80.00th=[ 45876], 90.00th=[ 57934], 95.00th=[ 71828], | 99.00th=[103285], 99.50th=[175113], 99.90th=[219153], 99.95th=[219153], | 99.99th=[219153] bw ( KiB/s): min= 118, max= 477, per=25.17%, avg=281.14, stdev=83.38, samples=42 iops : min= 7, max= 29, avg=16.83, stdev= 5.24, samples=42 write: IOPS=18, BW=293KiB/s (300kB/s)(6256KiB/21345msec); 0 zone resets clat (usec): min=854, max=174115, avg=27415.88, stdev=27599.64 lat (usec): min=856, max=174117, avg=27418.07, stdev=27600.02 clat percentiles (usec): | 1.00th=[ 1172], 5.00th=[ 1680], 10.00th=[ 2073], 20.00th=[ 3851], | 30.00th=[ 6390], 40.00th=[ 10945], 50.00th=[ 18482], 60.00th=[ 27132], | 70.00th=[ 38011], 80.00th=[ 49021], 90.00th=[ 65274], 95.00th=[ 77071], | 99.00th=[113771], 99.50th=[158335], 99.90th=[175113], 99.95th=[175113], | 99.99th=[175113] bw ( KiB/s): min= 95, max= 573, per=25.00%, avg=293.74, stdev=113.13, samples=42 iops : min= 5, max= 35, avg=17.62, stdev= 7.10, samples=42 lat (usec) : 50=1.82%, 100=9.77%, 250=0.13%, 750=0.13%, 1000=0.26% lat (msec) : 2=4.95%, 4=6.25%, 10=8.85%, 20=12.24%, 50=37.76% lat (msec) : 100=16.54%, 250=1.30% cpu : usr=0.10%, sys=6.67%, ctx=1384, 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=1117KiB/s (1144kB/s), 268KiB/s-293KiB/s (274kB/s-300kB/s), io=23.4MiB (24.5MB), run=21109-21436msec WRITE: bw=1176KiB/s (1204kB/s), 282KiB/s-305KiB/s (289kB/s-313kB/s), io=24.6MiB (25.8MB), run=21109-21436msec rand-rw: (groupid=0, jobs=1): err= 0: pid=154326: Sun Sep 6 20:21:37 2026 read: IOPS=7, BW=115KiB/s (118kB/s)(5920KiB/51464msec) clat (msec): min=6, max=192, avg=28.68, stdev=28.84 lat (msec): min=6, max=192, avg=28.68, stdev=28.84 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 10], 20.00th=[ 12], | 30.00th=[ 13], 40.00th=[ 16], 50.00th=[ 19], 60.00th=[ 23], | 70.00th=[ 28], 80.00th=[ 40], 90.00th=[ 58], 95.00th=[ 89], | 99.00th=[ 157], 99.50th=[ 182], 99.90th=[ 192], 99.95th=[ 192], | 99.99th=[ 192] bw ( KiB/s): min= 31, max= 379, per=26.53%, avg=121.25, stdev=70.25, samples=96 iops : min= 1, max= 23, avg= 6.80, stdev= 4.42, samples=96 write: IOPS=7, BW=124KiB/s (127kB/s)(6368KiB/51464msec); 0 zone resets clat (msec): min=35, max=386, avg=102.49, stdev=49.55 lat (msec): min=35, max=386, avg=102.49, stdev=49.55 clat percentiles (msec): | 1.00th=[ 40], 5.00th=[ 47], 10.00th=[ 54], 20.00th=[ 63], | 30.00th=[ 73], 40.00th=[ 82], 50.00th=[ 90], 60.00th=[ 103], | 70.00th=[ 116], 80.00th=[ 134], 90.00th=[ 167], 95.00th=[ 197], | 99.00th=[ 288], 99.50th=[ 305], 99.90th=[ 388], 99.95th=[ 388], | 99.99th=[ 388] bw ( KiB/s): min= 31, max= 255, per=25.87%, avg=124.44, stdev=52.87, samples=101 iops : min= 1, max= 15, avg= 7.02, stdev= 3.30, samples=101 lat (msec) : 10=7.03%, 20=19.92%, 50=18.36%, 100=30.99%, 250=22.79% lat (msec) : 500=0.91% cpu : usr=0.05%, sys=1.61%, ctx=1337, 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=154327: Sun Sep 6 20:21:37 2026 read: IOPS=6, BW=110KiB/s (112kB/s)(5744KiB/52311msec) clat (msec): min=5, max=247, avg=28.80, stdev=31.12 lat (msec): min=5, max=247, avg=28.80, stdev=31.12 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 8], 10.00th=[ 9], 20.00th=[ 11], | 30.00th=[ 12], 40.00th=[ 15], 50.00th=[ 17], 60.00th=[ 22], | 70.00th=[ 29], 80.00th=[ 40], 90.00th=[ 66], 95.00th=[ 94], | 99.00th=[ 176], 99.50th=[ 192], 99.90th=[ 249], 99.95th=[ 249], | 99.99th=[ 249] bw ( KiB/s): min= 30, max= 411, per=25.54%, avg=116.72, stdev=75.25, samples=96 iops : min= 1, max= 25, avg= 6.55, stdev= 4.73, samples=96 write: IOPS=7, BW=125KiB/s (128kB/s)(6544KiB/52311msec); 0 zone resets clat (msec): min=34, max=386, avg=102.19, stdev=48.87 lat (msec): min=34, max=386, avg=102.19, stdev=48.87 clat percentiles (msec): | 1.00th=[ 39], 5.00th=[ 46], 10.00th=[ 54], 20.00th=[ 62], | 30.00th=[ 73], 40.00th=[ 81], 50.00th=[ 89], 60.00th=[ 101], | 70.00th=[ 120], 80.00th=[ 138], 90.00th=[ 169], 95.00th=[ 194], | 99.00th=[ 255], 99.50th=[ 262], 99.90th=[ 388], 99.95th=[ 388], | 99.99th=[ 388] bw ( KiB/s): min= 31, max= 320, per=26.00%, avg=125.06, stdev=57.63, samples=102 iops : min= 1, max= 20, avg= 7.06, stdev= 3.66, samples=102 lat (msec) : 10=8.20%, 20=18.62%, 50=17.84%, 100=31.77%, 250=22.92% lat (msec) : 500=0.65% cpu : usr=0.05%, sys=1.49%, ctx=1313, 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=154328: Sun Sep 6 20:21:37 2026 read: IOPS=7, BW=126KiB/s (129kB/s)(6256KiB/49615msec) clat (msec): min=5, max=202, avg=26.38, stdev=24.19 lat (msec): min=5, max=202, avg=26.38, stdev=24.19 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 8], 10.00th=[ 9], 20.00th=[ 12], | 30.00th=[ 13], 40.00th=[ 16], 50.00th=[ 19], 60.00th=[ 23], | 70.00th=[ 28], 80.00th=[ 36], 90.00th=[ 52], 95.00th=[ 73], | 99.00th=[ 136], 99.50th=[ 178], 99.90th=[ 203], 99.95th=[ 203], | 99.99th=[ 203] bw ( KiB/s): min= 31, max= 478, per=29.13%, avg=133.12, stdev=95.63, samples=93 iops : min= 1, max= 29, avg= 7.57, stdev= 5.99, samples=93 write: IOPS=7, BW=122KiB/s (124kB/s)(6032KiB/49615msec); 0 zone resets clat (msec): min=35, max=292, avg=103.85, stdev=46.79 lat (msec): min=35, max=292, avg=103.86, stdev=46.79 clat percentiles (msec): | 1.00th=[ 40], 5.00th=[ 50], 10.00th=[ 54], 20.00th=[ 64], | 30.00th=[ 74], 40.00th=[ 83], 50.00th=[ 93], 60.00th=[ 106], | 70.00th=[ 121], 80.00th=[ 142], 90.00th=[ 171], 95.00th=[ 194], | 99.00th=[ 255], 99.50th=[ 284], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 31, max= 251, per=25.44%, avg=122.35, stdev=52.59, samples=97 iops : min= 1, max= 15, avg= 6.89, stdev= 3.33, samples=97 lat (msec) : 10=7.68%, 20=19.14%, 50=21.35%, 100=29.30%, 250=22.01% lat (msec) : 500=0.52% cpu : usr=0.06%, sys=1.62%, ctx=1406, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=154329: Sun Sep 6 20:21:37 2026 read: IOPS=7, BW=118KiB/s (120kB/s)(6032KiB/51283msec) clat (msec): min=5, max=244, avg=29.79, stdev=29.74 lat (msec): min=5, max=244, avg=29.79, stdev=29.74 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 10], 20.00th=[ 12], | 30.00th=[ 14], 40.00th=[ 17], 50.00th=[ 20], 60.00th=[ 23], | 70.00th=[ 28], 80.00th=[ 40], 90.00th=[ 69], 95.00th=[ 90], | 99.00th=[ 144], 99.50th=[ 180], 99.90th=[ 245], 99.95th=[ 245], | 99.99th=[ 245] bw ( KiB/s): min= 31, max= 320, per=26.48%, avg=121.02, stdev=72.16, samples=97 iops : min= 1, max= 20, avg= 6.80, stdev= 4.55, samples=97 write: IOPS=7, BW=122KiB/s (125kB/s)(6256KiB/51283msec); 0 zone resets clat (msec): min=32, max=309, avg=102.12, stdev=45.88 lat (msec): min=32, max=309, avg=102.12, stdev=45.88 clat percentiles (msec): | 1.00th=[ 39], 5.00th=[ 52], 10.00th=[ 58], 20.00th=[ 68], | 30.00th=[ 77], 40.00th=[ 83], 50.00th=[ 89], 60.00th=[ 100], | 70.00th=[ 114], 80.00th=[ 130], 90.00th=[ 163], 95.00th=[ 194], | 99.00th=[ 264], 99.50th=[ 300], 99.90th=[ 309], 99.95th=[ 309], | 99.99th=[ 309] bw ( KiB/s): min= 31, max= 254, per=25.22%, avg=121.33, stdev=53.42, samples=101 iops : min= 1, max= 15, avg= 6.82, stdev= 3.36, samples=101 lat (msec) : 10=5.86%, 20=19.79%, 50=18.10%, 100=34.51%, 250=21.09% lat (msec) : 500=0.65% cpu : usr=0.06%, sys=1.68%, ctx=1335, 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=458KiB/s (469kB/s), 110KiB/s-126KiB/s (112kB/s-129kB/s), io=23.4MiB (24.5MB), run=49615-52311msec WRITE: bw=482KiB/s (493kB/s), 122KiB/s-125KiB/s (124kB/s-128kB/s), io=24.6MiB (25.8MB), run=49615-52311msec 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=154358: Sun Sep 6 20:21:51 2026 read: IOPS=1, BW=1377KiB/s (1410kB/s)(7168KiB/5207msec) clat (usec): min=471, max=2880.4k, avg=541582.79, stdev=1037507.08 lat (usec): min=472, max=2880.4k, avg=541584.28, stdev=1037506.98 clat percentiles (usec): | 1.00th=[ 474], 5.00th=[ 474], 10.00th=[ 474], | 20.00th=[ 486], 30.00th=[ 175113], 40.00th=[ 175113], | 50.00th=[ 206570], 60.00th=[ 229639], 70.00th=[ 229639], | 80.00th=[ 295699], 90.00th=[2868904], 95.00th=[2868904], | 99.00th=[2868904], 99.50th=[2868904], 99.90th=[2868904], | 99.95th=[2868904], 99.99th=[2868904] bw ( KiB/s): min= 1488, max= 6023, per=84.25%, avg=3186.33, stdev=2472.53, samples=3 iops : min= 1, max= 5, avg= 2.67, stdev= 2.08, samples=3 write: IOPS=0, BW=983KiB/s (1007kB/s)(5120KiB/5207msec); 0 zone resets clat (msec): min=88, max=498, avg=202.01, stdev=169.37 lat (msec): min=88, max=499, avg=202.11, stdev=169.36 clat percentiles (msec): | 1.00th=[ 89], 5.00th=[ 89], 10.00th=[ 89], 20.00th=[ 89], | 30.00th=[ 109], 40.00th=[ 109], 50.00th=[ 136], 60.00th=[ 136], | 70.00th=[ 180], 80.00th=[ 180], 90.00th=[ 498], 95.00th=[ 498], | 99.00th=[ 498], 99.50th=[ 498], 99.90th=[ 498], 99.95th=[ 498], | 99.99th=[ 498] bw ( KiB/s): min= 2048, max= 4015, per=57.26%, avg=3031.50, stdev=1390.88, samples=2 iops : min= 2, max= 3, avg= 2.50, stdev= 0.71, samples=2 lat (usec) : 500=16.67% lat (msec) : 100=8.33%, 250=50.00%, 500=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=8.76%, ctx=367, 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=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=154359: Sun Sep 6 20:21:51 2026 read: IOPS=0, BW=384KiB/s (393kB/s)(2048KiB/5333msec) clat (usec): min=1859, max=214119, avg=107989.06, stdev=150090.43 lat (usec): min=1860, max=214122, avg=107991.30, stdev=150092.03 clat percentiles (usec): | 1.00th=[ 1860], 5.00th=[ 1860], 10.00th=[ 1860], 20.00th=[ 1860], | 30.00th=[ 1860], 40.00th=[ 1860], 50.00th=[ 1860], 60.00th=[214959], | 70.00th=[214959], 80.00th=[214959], 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= 1438, max= 2039, per=45.97%, avg=1738.50, stdev=424.97, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1920KiB/s (1966kB/s)(10.0MiB/5333msec); 0 zone resets clat (msec): min=66, max=1666, avg=469.52, stdev=491.66 lat (msec): min=66, max=1666, avg=469.62, stdev=491.66 clat percentiles (msec): | 1.00th=[ 67], 5.00th=[ 67], 10.00th=[ 67], 20.00th=[ 109], | 30.00th=[ 109], 40.00th=[ 184], 50.00th=[ 232], 60.00th=[ 330], | 70.00th=[ 493], 80.00th=[ 743], 90.00th=[ 760], 95.00th=[ 1670], | 99.00th=[ 1670], 99.50th=[ 1670], 99.90th=[ 1670], 99.95th=[ 1670], | 99.99th=[ 1670] bw ( KiB/s): min= 1969, max= 8159, per=69.08%, avg=3657.20, stdev=2670.59, samples=5 iops : min= 1, max= 7, avg= 2.80, stdev= 2.49, samples=5 lat (msec) : 2=8.33%, 100=8.33%, 250=41.67%, 500=16.67%, 750=8.33% lat (msec) : 1000=8.33%, 2000=8.33% cpu : usr=0.02%, sys=9.30%, ctx=182, 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=154360: Sun Sep 6 20:21:51 2026 read: IOPS=1, BW=1135KiB/s (1162kB/s)(6144KiB/5415msec) clat (usec): min=1381, max=485314, avg=243596.60, stdev=159412.18 lat (usec): min=1382, max=485315, avg=243597.94, stdev=159412.20 clat percentiles (usec): | 1.00th=[ 1385], 5.00th=[ 1385], 10.00th=[ 1385], 20.00th=[164627], | 30.00th=[164627], 40.00th=[240124], 50.00th=[240124], 60.00th=[274727], | 70.00th=[295699], 80.00th=[295699], 90.00th=[484443], 95.00th=[484443], | 99.00th=[484443], 99.50th=[484443], 99.90th=[484443], 99.95th=[484443], | 99.99th=[484443] bw ( KiB/s): min= 1969, max= 2039, per=53.35%, avg=2017.80, stdev=29.58, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 write: IOPS=1, BW=1135KiB/s (1162kB/s)(6144KiB/5415msec); 0 zone resets clat (msec): min=283, max=1668, avg=645.45, stdev=517.27 lat (msec): min=284, max=1681, avg=647.69, stdev=522.38 clat percentiles (msec): | 1.00th=[ 284], 5.00th=[ 284], 10.00th=[ 284], 20.00th=[ 368], | 30.00th=[ 368], 40.00th=[ 372], 50.00th=[ 372], 60.00th=[ 575], | 70.00th=[ 609], 80.00th=[ 609], 90.00th=[ 1670], 95.00th=[ 1670], | 99.00th=[ 1670], 99.50th=[ 1670], 99.90th=[ 1670], 99.95th=[ 1670], | 99.99th=[ 1670] bw ( KiB/s): min= 1969, max= 2856, per=41.34%, avg=2188.60, stdev=374.38, samples=5 iops : min= 1, max= 2, avg= 1.40, stdev= 0.55, samples=5 lat (msec) : 2=8.33%, 250=16.67%, 500=50.00%, 750=16.67%, 2000=8.33% cpu : usr=0.02%, sys=8.68%, ctx=193, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=154361: Sun Sep 6 20:21:51 2026 read: IOPS=0, BW=984KiB/s (1008kB/s)(5120KiB/5201msec) clat (usec): min=1598, max=300622, avg=127192.77, stdev=153477.70 lat (usec): min=1599, max=300623, avg=127194.12, stdev=153477.67 clat percentiles (usec): | 1.00th=[ 1598], 5.00th=[ 1598], 10.00th=[ 1598], 20.00th=[ 1598], | 30.00th=[ 1975], 40.00th=[ 1975], 50.00th=[ 43779], 60.00th=[ 43779], | 70.00th=[287310], 80.00th=[287310], 90.00th=[299893], 95.00th=[299893], | 99.00th=[299893], 99.50th=[299893], 99.90th=[299893], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 8159, max= 8159, per=100.00%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=1, BW=1378KiB/s (1411kB/s)(7168KiB/5201msec); 0 zone resets clat (msec): min=216, max=1449, avg=606.02, stdev=413.86 lat (msec): min=217, max=1449, avg=606.11, stdev=413.83 clat percentiles (msec): | 1.00th=[ 218], 5.00th=[ 218], 10.00th=[ 218], 20.00th=[ 305], | 30.00th=[ 359], 40.00th=[ 359], 50.00th=[ 550], 60.00th=[ 676], | 70.00th=[ 676], 80.00th=[ 684], 90.00th=[ 1452], 95.00th=[ 1452], | 99.00th=[ 1452], 99.50th=[ 1452], 99.90th=[ 1452], 99.95th=[ 1452], | 99.99th=[ 1452] bw ( KiB/s): min= 1969, max= 4096, per=45.95%, avg=2432.60, stdev=930.38, samples=5 iops : min= 1, max= 4, avg= 1.80, stdev= 1.30, samples=5 lat (msec) : 2=16.67%, 50=8.33%, 250=8.33%, 500=33.33%, 750=25.00% lat (msec) : 2000=8.33% cpu : usr=0.00%, sys=7.60%, ctx=150, 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=3782KiB/s (3873kB/s), 384KiB/s-1377KiB/s (393kB/s-1410kB/s), io=20.0MiB (20.0MB), run=5201-5415msec WRITE: bw=5295KiB/s (5422kB/s), 983KiB/s-1920KiB/s (1007kB/s-1966kB/s), io=28.0MiB (29.4MB), run=5201-5415msec rand-rw: (groupid=0, jobs=1): err= 0: pid=154353: Sun Sep 6 20:21:51 2026 read: IOPS=2, BW=2060KiB/s (2109kB/s)(7168KiB/3480msec) clat (msec): min=72, max=369, avg=188.63, stdev=116.78 lat (msec): min=72, max=369, avg=188.63, stdev=116.78 clat percentiles (msec): | 1.00th=[ 72], 5.00th=[ 72], 10.00th=[ 72], 20.00th=[ 113], | 30.00th=[ 138], 40.00th=[ 138], 50.00th=[ 142], 60.00th=[ 146], | 70.00th=[ 146], 80.00th=[ 342], 90.00th=[ 372], 95.00th=[ 372], | 99.00th=[ 372], 99.50th=[ 372], 99.90th=[ 372], 99.95th=[ 372], | 99.99th=[ 372] bw ( KiB/s): min= 2007, max= 4047, per=93.70%, avg=3359.00, stdev=1170.93, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1471KiB/s (1507kB/s)(5120KiB/3480msec); 0 zone resets clat (msec): min=215, max=591, avg=384.24, stdev=172.99 lat (msec): min=215, max=591, avg=384.42, stdev=172.93 clat percentiles (msec): | 1.00th=[ 215], 5.00th=[ 215], 10.00th=[ 215], 20.00th=[ 215], | 30.00th=[ 230], 40.00th=[ 230], 50.00th=[ 347], 60.00th=[ 347], | 70.00th=[ 542], 80.00th=[ 542], 90.00th=[ 592], 95.00th=[ 592], | 99.00th=[ 592], 99.50th=[ 592], 99.90th=[ 592], 99.95th=[ 592], | 99.99th=[ 592] bw ( KiB/s): min= 2011, max= 4071, per=53.96%, avg=2708.33, stdev=1180.21, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 100=8.33%, 250=50.00%, 500=25.00%, 750=16.67% cpu : usr=0.03%, sys=3.28%, ctx=50, 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=154355: Sun Sep 6 20:21:51 2026 read: IOPS=0, BW=359KiB/s (367kB/s)(2048KiB/5712msec) clat (msec): min=158, max=209, avg=184.01, stdev=35.85 lat (msec): min=158, max=209, avg=184.01, stdev=35.85 clat percentiles (msec): | 1.00th=[ 159], 5.00th=[ 159], 10.00th=[ 159], 20.00th=[ 159], | 30.00th=[ 159], 40.00th=[ 159], 50.00th=[ 159], 60.00th=[ 209], | 70.00th=[ 209], 80.00th=[ 209], 90.00th=[ 209], 95.00th=[ 209], | 99.00th=[ 209], 99.50th=[ 209], 99.90th=[ 209], 99.95th=[ 209], | 99.99th=[ 209] bw ( KiB/s): min= 1352, max= 2019, per=47.02%, avg=1685.50, stdev=471.64, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1793KiB/s (1836kB/s)(10.0MiB/5712msec); 0 zone resets clat (msec): min=135, max=1825, avg=517.08, stdev=504.73 lat (msec): min=135, max=1825, avg=517.43, stdev=504.79 clat percentiles (msec): | 1.00th=[ 136], 5.00th=[ 136], 10.00th=[ 136], 20.00th=[ 165], | 30.00th=[ 165], 40.00th=[ 292], 50.00th=[ 334], 60.00th=[ 355], | 70.00th=[ 523], 80.00th=[ 592], 90.00th=[ 785], 95.00th=[ 1821], | 99.00th=[ 1821], 99.50th=[ 1821], 99.90th=[ 1821], 99.95th=[ 1821], | 99.99th=[ 1821] bw ( KiB/s): min= 1352, max= 6119, per=62.21%, avg=3122.40, stdev=1962.88, samples=5 iops : min= 1, max= 5, avg= 2.20, stdev= 1.79, samples=5 lat (msec) : 250=41.67%, 500=25.00%, 750=16.67%, 1000=8.33%, 2000=8.33% cpu : usr=0.02%, sys=4.08%, ctx=96, 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=154356: Sun Sep 6 20:21:51 2026 read: IOPS=1, BW=1251KiB/s (1281kB/s)(6144KiB/4912msec) clat (msec): min=73, max=205, avg=128.25, stdev=46.86 lat (msec): min=73, max=205, avg=128.26, stdev=46.86 clat percentiles (msec): | 1.00th=[ 73], 5.00th=[ 73], 10.00th=[ 73], 20.00th=[ 93], | 30.00th=[ 93], 40.00th=[ 114], 50.00th=[ 114], 60.00th=[ 134], | 70.00th=[ 153], 80.00th=[ 153], 90.00th=[ 205], 95.00th=[ 205], | 99.00th=[ 205], 99.50th=[ 205], 99.90th=[ 205], 99.95th=[ 205], | 99.99th=[ 205] bw ( KiB/s): min= 2011, max= 4047, per=70.52%, avg=2528.00, stdev=1012.78, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=1, BW=1251KiB/s (1281kB/s)(6144KiB/4912msec); 0 zone resets clat (msec): min=193, max=2499, avg=679.89, stdev=895.02 lat (msec): min=194, max=2499, avg=679.99, stdev=895.02 clat percentiles (msec): | 1.00th=[ 194], 5.00th=[ 194], 10.00th=[ 194], 20.00th=[ 288], | 30.00th=[ 288], 40.00th=[ 305], 50.00th=[ 305], 60.00th=[ 355], | 70.00th=[ 439], 80.00th=[ 439], 90.00th=[ 2500], 95.00th=[ 2500], | 99.00th=[ 2500], 99.50th=[ 2500], 99.90th=[ 2500], 99.95th=[ 2500], | 99.99th=[ 2500] bw ( KiB/s): min= 2003, max= 4023, per=50.21%, avg=2520.00, stdev=1002.15, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 100=16.67%, 250=41.67%, 500=33.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.63%, ctx=60, 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=154357: Sun Sep 6 20:21:51 2026 read: IOPS=0, BW=980KiB/s (1003kB/s)(5120KiB/5227msec) clat (msec): min=93, max=492, avg=252.94, stdev=163.38 lat (msec): min=93, max=492, avg=252.94, stdev=163.38 clat percentiles (msec): | 1.00th=[ 93], 5.00th=[ 93], 10.00th=[ 93], 20.00th=[ 93], | 30.00th=[ 144], 40.00th=[ 144], 50.00th=[ 190], 60.00th=[ 190], | 70.00th=[ 342], 80.00th=[ 342], 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= 4063, max= 4087, per=100.00%, avg=4075.00, stdev=16.97, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1371KiB/s (1404kB/s)(7168KiB/5227msec); 0 zone resets clat (msec): min=144, max=1915, avg=532.56, stdev=629.72 lat (msec): min=144, max=1915, avg=532.66, stdev=629.72 clat percentiles (msec): | 1.00th=[ 146], 5.00th=[ 146], 10.00th=[ 146], 20.00th=[ 209], | 30.00th=[ 241], 40.00th=[ 241], 50.00th=[ 271], 60.00th=[ 317], | 70.00th=[ 317], 80.00th=[ 634], 90.00th=[ 1921], 95.00th=[ 1921], | 99.00th=[ 1921], 99.50th=[ 1921], 99.90th=[ 1921], 99.95th=[ 1921], | 99.99th=[ 1921] bw ( KiB/s): min= 2748, max= 6144, per=86.15%, avg=4323.67, stdev=1711.17, samples=3 iops : min= 2, max= 6, avg= 3.67, stdev= 2.08, samples=3 lat (msec) : 100=8.33%, 250=41.67%, 500=33.33%, 750=8.33%, 2000=8.33% cpu : usr=0.02%, sys=1.68%, ctx=47, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3585KiB/s (3671kB/s), 359KiB/s-2060KiB/s (367kB/s-2109kB/s), io=20.0MiB (20.0MB), run=3480-5712msec WRITE: bw=5020KiB/s (5140kB/s), 1251KiB/s-1793KiB/s (1281kB/s-1836kB/s), io=28.0MiB (29.4MB), run=3480-5712msec 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=154368: Sun Sep 6 20:22:03 2026 read: IOPS=1, BW=4844KiB/s (4960kB/s)(12.0MiB/2537msec) clat (msec): min=616, max=823, avg=716.68, stdev=103.41 lat (msec): min=616, max=823, avg=716.68, stdev=103.41 clat percentiles (msec): | 1.00th=[ 617], 5.00th=[ 617], 10.00th=[ 617], 20.00th=[ 617], | 30.00th=[ 617], 40.00th=[ 709], 50.00th=[ 709], 60.00th=[ 709], | 70.00th=[ 827], 80.00th=[ 827], 90.00th=[ 827], 95.00th=[ 827], | 99.00th=[ 827], 99.50th=[ 827], 99.90th=[ 827], 99.95th=[ 827], | 99.99th=[ 827] bw ( KiB/s): min= 8094, max= 8110, per=100.00%, avg=8102.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=13.21%, ctx=324, 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=154369: Sun Sep 6 20:22:03 2026 read: IOPS=0, BW=2189KiB/s (2242kB/s)(4096KiB/1871msec) clat (nsec): min=680709k, max=680709k, avg=680709310.00, stdev= 0.00 lat (nsec): min=680712k, max=680712k, avg=680711715.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 684], 5.00th=[ 684], 10.00th=[ 684], 20.00th=[ 684], | 30.00th=[ 684], 40.00th=[ 684], 50.00th=[ 684], 60.00th=[ 684], | 70.00th=[ 684], 80.00th=[ 684], 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= 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 write: IOPS=1, BW=4378KiB/s (4483kB/s)(8192KiB/1871msec); 0 zone resets clat (msec): min=307, max=756, avg=532.00, stdev=317.76 lat (msec): min=307, max=760, avg=534.01, stdev=320.08 clat percentiles (msec): | 1.00th=[ 309], 5.00th=[ 309], 10.00th=[ 309], 20.00th=[ 309], | 30.00th=[ 309], 40.00th=[ 309], 50.00th=[ 309], 60.00th=[ 760], | 70.00th=[ 760], 80.00th=[ 760], 90.00th=[ 760], 95.00th=[ 760], | 99.00th=[ 760], 99.50th=[ 760], 99.90th=[ 760], 99.95th=[ 760], | 99.99th=[ 760] bw ( KiB/s): min= 8110, max= 8110, per=62.79%, avg=8110.00, 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%, 1000=33.33% cpu : usr=0.00%, sys=14.65%, ctx=279, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=154370: Sun Sep 6 20:22:03 2026 write: IOPS=1, BW=4844KiB/s (4960kB/s)(12.0MiB/2537msec); 0 zone resets clat (msec): min=241, max=1151, avg=787.20, stdev=481.20 lat (msec): min=242, max=1151, avg=787.61, stdev=481.20 clat percentiles (msec): | 1.00th=[ 243], 5.00th=[ 243], 10.00th=[ 243], 20.00th=[ 243], | 30.00th=[ 243], 40.00th=[ 969], 50.00th=[ 969], 60.00th=[ 969], | 70.00th=[ 1150], 80.00th=[ 1150], 90.00th=[ 1150], 95.00th=[ 1150], | 99.00th=[ 1150], 99.50th=[ 1150], 99.90th=[ 1150], 99.95th=[ 1150], | 99.99th=[ 1150] bw ( KiB/s): min= 8031, max= 8031, per=62.18%, avg=8031.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=5.09%, ctx=44, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=154371: Sun Sep 6 20:22:03 2026 write: IOPS=1, BW=6295KiB/s (6446kB/s)(12.0MiB/1952msec); 0 zone resets clat (msec): min=279, max=1217, avg=594.73, stdev=539.26 lat (msec): min=279, max=1218, avg=595.59, stdev=539.88 clat percentiles (msec): | 1.00th=[ 279], 5.00th=[ 279], 10.00th=[ 279], 20.00th=[ 279], | 30.00th=[ 279], 40.00th=[ 288], 50.00th=[ 288], 60.00th=[ 288], | 70.00th=[ 1217], 80.00th=[ 1217], 90.00th=[ 1217], 95.00th=[ 1217], | 99.00th=[ 1217], 99.50th=[ 1217], 99.90th=[ 1217], 99.95th=[ 1217], | 99.99th=[ 1217] bw ( KiB/s): min= 7420, max= 8159, per=60.31%, avg=7789.50, stdev=522.55, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=66.67%, 2000=33.33% cpu : usr=0.05%, sys=7.69%, ctx=81, 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=6458KiB/s (6613kB/s), 2189KiB/s-4844KiB/s (2242kB/s-4960kB/s), io=16.0MiB (16.8MB), run=1871-2537msec WRITE: bw=12.6MiB/s (13.2MB/s), 4378KiB/s-6295KiB/s (4483kB/s-6446kB/s), io=32.0MiB (33.6MB), run=1871-2537msec rand-rw: (groupid=0, jobs=1): err= 0: pid=154372: Sun Sep 6 20:22:04 2026 read: IOPS=0, BW=3869KiB/s (3962kB/s)(12.0MiB/3176msec) clat (msec): min=257, max=1546, avg=1006.43, stdev=669.25 lat (msec): min=257, max=1546, avg=1006.43, stdev=669.25 clat percentiles (msec): | 1.00th=[ 257], 5.00th=[ 257], 10.00th=[ 257], 20.00th=[ 257], | 30.00th=[ 257], 40.00th=[ 1217], 50.00th=[ 1217], 60.00th=[ 1217], | 70.00th=[ 1552], 80.00th=[ 1552], 90.00th=[ 1552], 95.00th=[ 1552], | 99.00th=[ 1552], 99.50th=[ 1552], 99.90th=[ 1552], 99.95th=[ 1552], | 99.99th=[ 1552] bw ( KiB/s): min= 8192, max= 8192, per=100.00%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.40%, ctx=43, 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=154373: Sun Sep 6 20:22:04 2026 read: IOPS=0, BW=1565KiB/s (1603kB/s)(4096KiB/2617msec) clat (nsec): min=858350k, max=858350k, avg=858350062.00, stdev= 0.00 lat (nsec): min=858353k, max=858353k, avg=858352575.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 860], 5.00th=[ 860], 10.00th=[ 860], 20.00th=[ 860], | 30.00th=[ 860], 40.00th=[ 860], 50.00th=[ 860], 60.00th=[ 860], | 70.00th=[ 860], 80.00th=[ 860], 90.00th=[ 860], 95.00th=[ 860], | 99.00th=[ 860], 99.50th=[ 860], 99.90th=[ 860], 99.95th=[ 860], | 99.99th=[ 860] bw ( KiB/s): min= 8047, max= 8047, per=100.00%, avg=8047.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3130KiB/s (3205kB/s)(8192KiB/2617msec); 0 zone resets clat (msec): min=530, max=980, avg=755.62, stdev=318.07 lat (msec): min=531, max=980, avg=756.01, stdev=318.08 clat percentiles (msec): | 1.00th=[ 531], 5.00th=[ 531], 10.00th=[ 531], 20.00th=[ 531], | 30.00th=[ 531], 40.00th=[ 531], 50.00th=[ 531], 60.00th=[ 978], | 70.00th=[ 978], 80.00th=[ 978], 90.00th=[ 978], 95.00th=[ 978], | 99.00th=[ 978], 99.50th=[ 978], 99.90th=[ 978], 99.95th=[ 978], | 99.99th=[ 978] bw ( KiB/s): min= 8031, max= 8031, per=72.62%, avg=8031.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=66.67% cpu : usr=0.00%, sys=4.66%, ctx=90, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=154374: Sun Sep 6 20:22:04 2026 write: IOPS=1, BW=4147KiB/s (4247kB/s)(12.0MiB/2963msec); 0 zone resets clat (msec): min=301, max=1422, avg=948.13, stdev=580.35 lat (msec): min=301, max=1423, avg=948.56, stdev=580.42 clat percentiles (msec): | 1.00th=[ 300], 5.00th=[ 300], 10.00th=[ 300], 20.00th=[ 300], | 30.00th=[ 300], 40.00th=[ 1116], 50.00th=[ 1116], 60.00th=[ 1116], | 70.00th=[ 1418], 80.00th=[ 1418], 90.00th=[ 1418], 95.00th=[ 1418], | 99.00th=[ 1418], 99.50th=[ 1418], 99.90th=[ 1418], 99.95th=[ 1418], | 99.99th=[ 1418] bw ( KiB/s): min= 8031, max= 8031, per=72.62%, avg=8031.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.63%, ctx=43, 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=154375: Sun Sep 6 20:22:04 2026 write: IOPS=1, BW=5697KiB/s (5834kB/s)(12.0MiB/2157msec); 0 zone resets clat (msec): min=480, max=1038, avg=682.93, stdev=308.90 lat (msec): min=480, max=1038, avg=683.40, stdev=308.90 clat percentiles (msec): | 1.00th=[ 481], 5.00th=[ 481], 10.00th=[ 481], 20.00th=[ 481], | 30.00th=[ 481], 40.00th=[ 531], 50.00th=[ 531], 60.00th=[ 531], | 70.00th=[ 1036], 80.00th=[ 1036], 90.00th=[ 1036], 95.00th=[ 1036], | 99.00th=[ 1036], 99.50th=[ 1036], 99.90th=[ 1036], 99.95th=[ 1036], | 99.99th=[ 1036] bw ( KiB/s): min= 8031, max= 8047, per=72.69%, avg=8039.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.92%, ctx=51, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=5159KiB/s (5282kB/s), 1565KiB/s-3869KiB/s (1603kB/s-3962kB/s), io=16.0MiB (16.8MB), run=2617-3176msec WRITE: bw=10.8MiB/s (11.3MB/s), 3130KiB/s-5697KiB/s (3205kB/s-5834kB/s), io=32.0MiB (33.6MB), run=2157-2963msec