== sanity test 398b: DIO and buffer IO race ============== 22:25:28 (1789784728) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.97397 s, 7.2 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=180050: Fri Sep 18 22:28:03 2026 read: IOPS=11, BW=44.8KiB/s (45.9kB/s)(5992KiB/133695msec) clat (usec): min=40, max=301473, avg=48915.18, stdev=33842.24 lat (usec): min=40, max=301474, avg=48916.36, stdev=33842.23 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 13304], 10.00th=[ 17695], 20.00th=[ 23987], | 30.00th=[ 29492], 40.00th=[ 34866], 50.00th=[ 40633], 60.00th=[ 47973], | 70.00th=[ 58459], 80.00th=[ 69731], 90.00th=[ 89654], 95.00th=[106431], | 99.00th=[179307], 99.50th=[212861], 99.90th=[263193], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 7, max= 112, per=24.81%, avg=44.40, stdev=18.64, samples=263 iops : min= 1, max= 28, avg=10.43, stdev= 4.70, samples=263 write: IOPS=11, BW=47.1KiB/s (48.2kB/s)(6296KiB/133695msec); 0 zone resets clat (usec): min=966, max=1009.8k, avg=38099.95, stdev=45325.33 lat (usec): min=968, max=1009.8k, avg=38107.03, stdev=45326.61 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1237], 10.00th=[ 1795], | 20.00th=[ 4080], 30.00th=[ 8029], 40.00th=[ 17695], | 50.00th=[ 26608], 60.00th=[ 35390], 70.00th=[ 48497], | 80.00th=[ 64750], 90.00th=[ 90702], 95.00th=[ 117965], | 99.00th=[ 162530], 99.50th=[ 185598], 99.90th=[ 233833], | 99.95th=[1010828], 99.99th=[1010828] bw ( KiB/s): min= 7, max= 112, per=25.01%, avg=47.02, stdev=21.09, samples=261 iops : min= 1, max= 28, avg=11.10, stdev= 5.31, samples=261 lat (usec) : 50=0.20%, 100=1.20%, 250=0.16%, 500=0.03%, 1000=0.13% lat (msec) : 2=5.83%, 4=4.13%, 10=6.90%, 20=9.24%, 50=38.83% lat (msec) : 100=26.33%, 250=6.87%, 500=0.10%, 2000=0.03% cpu : usr=0.08%, sys=5.13%, ctx=6609, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180051: Fri Sep 18 22:28:03 2026 read: IOPS=11, BW=45.3KiB/s (46.4kB/s)(5940KiB/131019msec) clat (usec): min=41, max=368137, avg=47359.91, stdev=32015.40 lat (usec): min=41, max=368138, avg=47361.18, stdev=32015.44 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 9634], 10.00th=[ 16712], 20.00th=[ 24249], | 30.00th=[ 30016], 40.00th=[ 35390], 50.00th=[ 40633], 60.00th=[ 47973], | 70.00th=[ 55837], 80.00th=[ 67634], 90.00th=[ 82314], 95.00th=[104334], | 99.00th=[158335], 99.50th=[185598], 99.90th=[263193], 99.95th=[367002], | 99.99th=[367002] bw ( KiB/s): min= 7, max= 103, per=25.10%, avg=44.94, stdev=18.34, samples=257 iops : min= 1, max= 25, avg=10.57, stdev= 4.61, samples=257 write: IOPS=12, BW=48.5KiB/s (49.6kB/s)(6348KiB/131019msec); 0 zone resets clat (usec): min=939, max=787363, avg=37957.24, stdev=43267.02 lat (usec): min=940, max=787365, avg=37962.07, stdev=43265.82 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1254], 10.00th=[ 1729], 20.00th=[ 4228], | 30.00th=[ 7373], 40.00th=[ 17433], 50.00th=[ 26870], 60.00th=[ 35914], | 70.00th=[ 48497], 80.00th=[ 65799], 90.00th=[ 90702], 95.00th=[111674], | 99.00th=[183501], 99.50th=[202376], 99.90th=[267387], 99.95th=[784335], | 99.99th=[784335] bw ( KiB/s): min= 7, max= 127, per=25.49%, avg=47.93, stdev=20.28, samples=257 iops : min= 1, max= 31, avg=11.32, stdev= 5.09, samples=257 lat (usec) : 50=0.29%, 100=1.76%, 250=0.23%, 1000=0.13% lat (msec) : 2=6.02%, 4=3.91%, 10=7.52%, 20=8.43%, 50=38.57% lat (msec) : 100=26.24%, 250=6.74%, 500=0.13%, 1000=0.03% cpu : usr=0.08%, sys=5.11%, ctx=6429, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180052: Fri Sep 18 22:28:03 2026 read: IOPS=11, BW=46.5KiB/s (47.6kB/s)(6028KiB/129556msec) clat (usec): min=33, max=277225, avg=46662.65, stdev=31908.51 lat (usec): min=33, max=277226, avg=46664.11, stdev=31908.64 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 11731], 10.00th=[ 17433], 20.00th=[ 22414], | 30.00th=[ 27657], 40.00th=[ 33162], 50.00th=[ 39060], 60.00th=[ 47449], | 70.00th=[ 55837], 80.00th=[ 66847], 90.00th=[ 85459], 95.00th=[102237], | 99.00th=[170918], 99.50th=[198181], 99.90th=[270533], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 7, max= 103, per=25.86%, avg=46.29, stdev=18.03, samples=253 iops : min= 1, max= 25, avg=10.90, stdev= 4.54, samples=253 write: IOPS=12, BW=48.3KiB/s (49.5kB/s)(6260KiB/129556msec); 0 zone resets clat (usec): min=849, max=768197, avg=37565.84, stdev=43067.73 lat (usec): min=851, max=768199, avg=37569.85, stdev=43069.97 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1221], 10.00th=[ 1713], 20.00th=[ 3785], | 30.00th=[ 7701], 40.00th=[ 16319], 50.00th=[ 26608], 60.00th=[ 36439], | 70.00th=[ 47973], 80.00th=[ 65274], 90.00th=[ 91751], 95.00th=[110625], | 99.00th=[162530], 99.50th=[204473], 99.90th=[375391], 99.95th=[767558], | 99.99th=[767558] bw ( KiB/s): min= 7, max= 127, per=25.70%, avg=48.32, stdev=20.28, samples=251 iops : min= 1, max= 31, avg=11.42, stdev= 5.09, samples=251 lat (usec) : 50=0.26%, 100=1.43%, 250=0.16%, 500=0.13%, 1000=0.10% lat (msec) : 2=5.63%, 4=4.98%, 10=6.77%, 20=9.93%, 50=38.38% lat (msec) : 100=25.75%, 250=6.32%, 500=0.13%, 1000=0.03% cpu : usr=0.08%, sys=5.17%, ctx=6384, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180053: Fri Sep 18 22:28:03 2026 read: IOPS=11, BW=45.4KiB/s (46.5kB/s)(6052KiB/133286msec) clat (usec): min=40, max=1049.7k, avg=48620.97, stdev=41044.10 lat (usec): min=41, max=1049.7k, avg=48632.66, stdev=41055.39 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 9765], 10.00th=[ 16712], | 20.00th=[ 23725], 30.00th=[ 30016], 40.00th=[ 35390], | 50.00th=[ 41681], 60.00th=[ 48497], 70.00th=[ 57410], | 80.00th=[ 67634], 90.00th=[ 84411], 95.00th=[ 109577], | 99.00th=[ 154141], 99.50th=[ 198181], 99.90th=[ 270533], | 99.95th=[1052771], 99.99th=[1052771] bw ( KiB/s): min= 7, max= 104, per=25.12%, avg=44.97, stdev=19.16, samples=262 iops : min= 1, max= 26, avg=10.57, stdev= 4.83, samples=262 write: IOPS=11, BW=46.8KiB/s (47.9kB/s)(6236KiB/133286msec); 0 zone resets clat (usec): min=858, max=339819, avg=38015.00, stdev=39382.21 lat (usec): min=858, max=339820, avg=38020.32, stdev=39382.00 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1254], 10.00th=[ 1680], 20.00th=[ 4015], | 30.00th=[ 7898], 40.00th=[ 17957], 50.00th=[ 27132], 60.00th=[ 37487], | 70.00th=[ 50070], 80.00th=[ 64750], 90.00th=[ 90702], 95.00th=[113771], | 99.00th=[166724], 99.50th=[189793], 99.90th=[278922], 99.95th=[341836], | 99.99th=[341836] bw ( KiB/s): min= 7, max= 119, per=24.57%, avg=46.19, stdev=20.53, samples=262 iops : min= 1, max= 29, avg=10.88, stdev= 5.15, samples=262 lat (usec) : 50=0.26%, 100=1.53%, 250=0.26%, 500=0.07%, 1000=0.10% lat (msec) : 2=5.86%, 4=4.17%, 10=6.87%, 20=8.98%, 50=38.05% lat (msec) : 100=27.54%, 250=6.12%, 500=0.16%, 2000=0.03% cpu : usr=0.07%, sys=5.24%, ctx=6625, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=180KiB/s (184kB/s), 44.8KiB/s-46.5KiB/s (45.9kB/s-47.6kB/s), io=23.4MiB (24.6MB), run=129556-133695msec WRITE: bw=188KiB/s (193kB/s), 46.8KiB/s-48.5KiB/s (47.9kB/s-49.6kB/s), io=24.6MiB (25.7MB), run=129556-133695msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180055: Fri Sep 18 22:28:59 2026 read: IOPS=7, BW=31.7KiB/s (32.5kB/s)(5992KiB/188823msec) clat (msec): min=6, max=1062, avg=49.73, stdev=49.46 lat (msec): min=6, max=1062, avg=49.74, stdev=49.46 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 21], | 30.00th=[ 25], 40.00th=[ 30], 50.00th=[ 36], 60.00th=[ 43], | 70.00th=[ 53], 80.00th=[ 69], 90.00th=[ 101], 95.00th=[ 138], | 99.00th=[ 209], 99.50th=[ 247], 99.90th=[ 363], 99.95th=[ 1062], | 99.99th=[ 1062] bw ( KiB/s): min= 7, max= 105, per=25.28%, avg=31.86, stdev=19.74, samples=364 iops : min= 1, max= 26, avg= 7.29, stdev= 4.96, samples=364 write: IOPS=8, BW=33.3KiB/s (34.1kB/s)(6296KiB/188823msec); 0 zone resets clat (msec): min=9, max=456, avg=72.50, stdev=47.03 lat (msec): min=9, max=456, avg=72.50, stdev=47.03 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 26], 10.00th=[ 31], 20.00th=[ 38], | 30.00th=[ 45], 40.00th=[ 52], 50.00th=[ 61], 60.00th=[ 69], | 70.00th=[ 82], 80.00th=[ 99], 90.00th=[ 132], 95.00th=[ 163], | 99.00th=[ 241], 99.50th=[ 296], 99.90th=[ 447], 99.95th=[ 456], | 99.99th=[ 456] bw ( KiB/s): min= 7, max= 94, per=25.11%, avg=33.15, stdev=17.41, samples=368 iops : min= 1, max= 23, avg= 7.61, stdev= 4.39, samples=368 lat (msec) : 10=0.91%, 20=9.41%, 50=42.15%, 100=32.58%, 250=14.32% lat (msec) : 500=0.59%, 2000=0.03% cpu : usr=0.06%, sys=1.69%, ctx=4704, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180056: Fri Sep 18 22:28:59 2026 read: IOPS=7, BW=31.5KiB/s (32.3kB/s)(5940KiB/188438msec) clat (msec): min=6, max=887, avg=48.72, stdev=44.39 lat (msec): min=6, max=887, avg=48.72, stdev=44.39 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 21], | 30.00th=[ 26], 40.00th=[ 31], 50.00th=[ 36], 60.00th=[ 44], | 70.00th=[ 53], 80.00th=[ 69], 90.00th=[ 97], 95.00th=[ 130], | 99.00th=[ 192], 99.50th=[ 245], 99.90th=[ 296], 99.95th=[ 885], | 99.99th=[ 885] bw ( KiB/s): min= 7, max= 95, per=25.56%, avg=32.21, stdev=19.02, samples=357 iops : min= 1, max= 23, avg= 7.38, stdev= 4.79, samples=357 write: IOPS=8, BW=33.7KiB/s (34.5kB/s)(6348KiB/188438msec); 0 zone resets clat (msec): min=13, max=457, avg=73.05, stdev=48.00 lat (msec): min=13, max=457, avg=73.06, stdev=48.00 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 25], 10.00th=[ 30], 20.00th=[ 37], | 30.00th=[ 44], 40.00th=[ 51], 50.00th=[ 61], 60.00th=[ 72], | 70.00th=[ 85], 80.00th=[ 102], 90.00th=[ 133], 95.00th=[ 159], | 99.00th=[ 259], 99.50th=[ 296], 99.90th=[ 443], 99.95th=[ 460], | 99.99th=[ 460] bw ( KiB/s): min= 7, max= 95, per=25.31%, avg=33.41, stdev=17.40, samples=367 iops : min= 1, max= 23, avg= 7.68, stdev= 4.38, samples=367 lat (msec) : 10=1.17%, 20=9.21%, 50=42.64%, 100=32.03%, 250=14.10% lat (msec) : 500=0.81%, 1000=0.03% cpu : usr=0.06%, sys=1.66%, ctx=4862, 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=180057: Fri Sep 18 22:28:59 2026 read: IOPS=7, BW=31.8KiB/s (32.5kB/s)(6028KiB/189779msec) clat (msec): min=5, max=357, avg=49.23, stdev=42.52 lat (msec): min=5, max=357, avg=49.23, stdev=42.52 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 20], | 30.00th=[ 25], 40.00th=[ 31], 50.00th=[ 36], 60.00th=[ 42], | 70.00th=[ 52], 80.00th=[ 70], 90.00th=[ 110], 95.00th=[ 140], | 99.00th=[ 205], 99.50th=[ 239], 99.90th=[ 296], 99.95th=[ 359], | 99.99th=[ 359] bw ( KiB/s): min= 7, max= 133, per=25.32%, avg=31.91, stdev=19.77, samples=366 iops : min= 1, max= 33, avg= 7.31, stdev= 4.98, samples=366 write: IOPS=8, BW=32.0KiB/s (33.8kB/s)(6260KiB/189779msec); 0 zone resets clat (msec): min=13, max=894, avg=73.75, stdev=52.42 lat (msec): min=13, max=894, avg=73.75, stdev=52.42 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 25], 10.00th=[ 30], 20.00th=[ 38], | 30.00th=[ 44], 40.00th=[ 51], 50.00th=[ 59], 60.00th=[ 70], | 70.00th=[ 83], 80.00th=[ 102], 90.00th=[ 138], 95.00th=[ 171], | 99.00th=[ 255], 99.50th=[ 275], 99.90th=[ 430], 99.95th=[ 894], | 99.99th=[ 894] bw ( KiB/s): min= 7, max= 95, per=24.82%, avg=32.76, stdev=17.96, samples=370 iops : min= 1, max= 23, avg= 7.52, stdev= 4.53, samples=370 lat (msec) : 10=1.33%, 20=9.38%, 50=43.03%, 100=30.11%, 250=15.43% lat (msec) : 500=0.68%, 1000=0.03% cpu : usr=0.05%, sys=1.67%, ctx=4790, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180058: Fri Sep 18 22:28:59 2026 read: IOPS=7, BW=31.0KiB/s (32.7kB/s)(6052KiB/189332msec) clat (msec): min=5, max=358, avg=48.62, stdev=42.17 lat (msec): min=5, max=358, avg=48.62, stdev=42.17 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 16], 20.00th=[ 20], | 30.00th=[ 25], 40.00th=[ 29], 50.00th=[ 35], 60.00th=[ 42], | 70.00th=[ 51], 80.00th=[ 68], 90.00th=[ 105], 95.00th=[ 140], | 99.00th=[ 203], 99.50th=[ 215], 99.90th=[ 330], 99.95th=[ 359], | 99.99th=[ 359] bw ( KiB/s): min= 7, max= 112, per=25.86%, avg=32.58, stdev=20.38, samples=360 iops : min= 1, max= 28, avg= 7.47, stdev= 5.13, samples=360 write: IOPS=8, BW=32.9KiB/s (33.7kB/s)(6236KiB/189332msec); 0 zone resets clat (msec): min=11, max=907, avg=74.15, stdev=52.41 lat (msec): min=11, max=907, avg=74.15, stdev=52.41 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 26], 10.00th=[ 31], 20.00th=[ 37], | 30.00th=[ 44], 40.00th=[ 52], 50.00th=[ 60], 60.00th=[ 70], | 70.00th=[ 85], 80.00th=[ 105], 90.00th=[ 138], 95.00th=[ 171], | 99.00th=[ 253], 99.50th=[ 309], 99.90th=[ 422], 99.95th=[ 911], | 99.99th=[ 911] bw ( KiB/s): min= 7, max= 102, per=24.78%, avg=32.71, stdev=17.96, samples=369 iops : min= 1, max= 25, avg= 7.50, stdev= 4.53, samples=369 lat (msec) : 10=1.24%, 20=9.64%, 50=42.90%, 100=29.92%, 250=15.66% lat (msec) : 500=0.62%, 1000=0.03% cpu : usr=0.05%, sys=1.64%, ctx=4707, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=127KiB/s (130kB/s), 31.5KiB/s-31.0KiB/s (32.3kB/s-32.7kB/s), io=23.4MiB (24.6MB), run=188438-189779msec WRITE: bw=132KiB/s (136kB/s), 32.9KiB/s-33.7KiB/s (33.7kB/s-34.5kB/s), io=24.6MiB (25.7MB), run=188438-189779msec 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=180108: Fri Sep 18 22:29:43 2026 read: IOPS=11, BW=183KiB/s (187kB/s)(5920KiB/32377msec) clat (usec): min=44, max=200661, avg=45176.30, stdev=33369.10 lat (usec): min=45, max=200663, avg=45183.27, stdev=33379.70 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 62], 10.00th=[ 94], 20.00th=[ 21627], | 30.00th=[ 27132], 40.00th=[ 32900], 50.00th=[ 39060], 60.00th=[ 46400], | 70.00th=[ 58459], 80.00th=[ 67634], 90.00th=[ 86508], 95.00th=[109577], | 99.00th=[160433], 99.50th=[191890], 99.90th=[200279], 99.95th=[200279], | 99.99th=[200279] bw ( KiB/s): min= 31, max= 351, per=25.09%, avg=181.14, stdev=69.29, samples=63 iops : min= 1, max= 21, avg=10.56, stdev= 4.35, samples=63 write: IOPS=12, BW=197KiB/s (201kB/s)(6368KiB/32377msec); 0 zone resets clat (usec): min=1351, max=240481, avg=39123.98, stdev=35708.46 lat (usec): min=1352, max=240483, avg=39127.13, stdev=35707.88 clat percentiles (usec): | 1.00th=[ 1516], 5.00th=[ 2008], 10.00th=[ 3687], 20.00th=[ 7177], | 30.00th=[ 12125], 40.00th=[ 23462], 50.00th=[ 30278], 60.00th=[ 39584], | 70.00th=[ 51643], 80.00th=[ 66323], 90.00th=[ 84411], 95.00th=[103285], | 99.00th=[158335], 99.50th=[217056], 99.90th=[240124], 99.95th=[240124], | 99.99th=[240124] bw ( KiB/s): min= 31, max= 383, per=25.83%, avg=196.29, stdev=79.61, samples=63 iops : min= 1, max= 23, avg=11.51, stdev= 5.00, samples=63 lat (usec) : 50=0.39%, 100=4.56%, 250=0.78%, 750=0.13%, 1000=0.13% lat (msec) : 2=2.60%, 4=4.04%, 10=7.42%, 20=7.81%, 50=37.76% lat (msec) : 100=29.04%, 250=5.34% cpu : usr=0.06%, sys=5.84%, ctx=1700, 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=180109: Fri Sep 18 22:29:43 2026 read: IOPS=10, BW=173KiB/s (177kB/s)(5744KiB/33155msec) clat (usec): min=49, max=181786, avg=47169.11, stdev=30925.79 lat (usec): min=50, max=181788, avg=47179.63, stdev=30922.09 clat percentiles (usec): | 1.00th=[ 57], 5.00th=[ 65], 10.00th=[ 963], 20.00th=[ 25297], | 30.00th=[ 30802], 40.00th=[ 35914], 50.00th=[ 42730], 60.00th=[ 48497], | 70.00th=[ 57410], 80.00th=[ 68682], 90.00th=[ 85459], 95.00th=[106431], | 99.00th=[152044], 99.50th=[156238], 99.90th=[181404], 99.95th=[181404], | 99.99th=[181404] bw ( KiB/s): min= 31, max= 448, per=24.24%, avg=174.98, stdev=79.80, samples=64 iops : min= 1, max= 28, avg=10.17, stdev= 5.05, samples=64 write: IOPS=12, BW=197KiB/s (202kB/s)(6544KiB/33155msec); 0 zone resets clat (usec): min=1407, max=240438, avg=38942.50, stdev=38336.22 lat (usec): min=1409, max=240439, avg=38947.04, stdev=38334.14 clat percentiles (usec): | 1.00th=[ 1647], 5.00th=[ 2180], 10.00th=[ 3884], 20.00th=[ 6849], | 30.00th=[ 12125], 40.00th=[ 18744], 50.00th=[ 28443], 60.00th=[ 36439], | 70.00th=[ 47973], 80.00th=[ 64750], 90.00th=[ 95945], 95.00th=[119014], | 99.00th=[170918], 99.50th=[179307], 99.90th=[240124], 99.95th=[240124], | 99.99th=[240124] bw ( KiB/s): min= 31, max= 349, per=25.78%, avg=195.94, stdev=74.27, samples=65 iops : min= 1, max= 21, avg=11.49, stdev= 4.69, samples=65 lat (usec) : 50=0.13%, 100=4.04%, 250=0.13%, 500=0.13%, 1000=0.26% lat (msec) : 2=2.34%, 4=3.26%, 10=9.51%, 20=8.33%, 50=38.41% lat (msec) : 100=26.04%, 250=7.42% cpu : usr=0.07%, sys=5.74%, ctx=1785, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180110: Fri Sep 18 22:29:43 2026 read: IOPS=11, BW=192KiB/s (196kB/s)(6256KiB/32663msec) clat (usec): min=41, max=239477, avg=47808.89, stdev=32078.31 lat (usec): min=41, max=239478, avg=47810.76, stdev=32078.83 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 67], 10.00th=[ 14877], 20.00th=[ 25035], | 30.00th=[ 31065], 40.00th=[ 36439], 50.00th=[ 43254], 60.00th=[ 48497], | 70.00th=[ 57934], 80.00th=[ 69731], 90.00th=[ 86508], 95.00th=[102237], | 99.00th=[156238], 99.50th=[198181], 99.90th=[240124], 99.95th=[240124], | 99.99th=[240124] bw ( KiB/s): min= 55, max= 381, per=26.69%, avg=192.73, stdev=65.81, samples=64 iops : min= 3, max= 23, avg=11.30, stdev= 4.09, samples=64 write: IOPS=11, BW=185KiB/s (189kB/s)(6032KiB/32663msec); 0 zone resets clat (usec): min=1366, max=221784, avg=36616.51, stdev=38856.52 lat (usec): min=1368, max=221786, avg=36620.31, stdev=38855.69 clat percentiles (usec): | 1.00th=[ 1582], 5.00th=[ 2114], 10.00th=[ 3359], 20.00th=[ 6194], | 30.00th=[ 9896], 40.00th=[ 17957], 50.00th=[ 25560], 60.00th=[ 34341], | 70.00th=[ 44303], 80.00th=[ 58983], 90.00th=[ 80217], 95.00th=[109577], | 99.00th=[198181], 99.50th=[208667], 99.90th=[221250], 99.95th=[221250], | 99.99th=[221250] bw ( KiB/s): min= 31, max= 448, per=24.24%, avg=184.22, stdev=90.06, samples=64 iops : min= 1, max= 28, avg=10.75, stdev= 5.68, samples=64 lat (usec) : 50=0.13%, 100=3.78%, 250=0.26%, 500=0.13% lat (msec) : 2=2.21%, 4=3.26%, 10=9.77%, 20=8.20%, 50=40.10% lat (msec) : 100=26.43%, 250=5.73% cpu : usr=0.07%, sys=6.22%, ctx=1729, 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=180111: Fri Sep 18 22:29:43 2026 read: IOPS=11, BW=183KiB/s (188kB/s)(6032KiB/32893msec) clat (usec): min=46, max=218386, avg=45834.58, stdev=31695.79 lat (usec): min=47, max=218387, avg=45835.91, stdev=31695.72 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 61], 10.00th=[ 112], 20.00th=[ 23200], | 30.00th=[ 30802], 40.00th=[ 35390], 50.00th=[ 41157], 60.00th=[ 48497], | 70.00th=[ 55837], 80.00th=[ 66323], 90.00th=[ 85459], 95.00th=[101188], | 99.00th=[156238], 99.50th=[162530], 99.90th=[219153], 99.95th=[219153], | 99.99th=[219153] bw ( KiB/s): min= 32, max= 349, per=25.32%, avg=182.78, stdev=74.52, samples=65 iops : min= 2, max= 21, avg=10.68, stdev= 4.62, samples=65 write: IOPS=11, BW=190KiB/s (195kB/s)(6256KiB/32893msec); 0 zone resets clat (usec): min=1533, max=312914, avg=39194.68, stdev=42173.54 lat (usec): min=1535, max=312916, avg=39198.43, stdev=42172.15 clat percentiles (usec): | 1.00th=[ 1598], 5.00th=[ 1844], 10.00th=[ 2999], 20.00th=[ 5866], | 30.00th=[ 9765], 40.00th=[ 16188], 50.00th=[ 29230], 60.00th=[ 36963], | 70.00th=[ 46400], 80.00th=[ 68682], 90.00th=[ 91751], 95.00th=[120062], | 99.00th=[204473], 99.50th=[229639], 99.90th=[312476], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 62, max= 349, per=25.03%, avg=190.22, stdev=63.25, samples=65 iops : min= 3, max= 21, avg=11.14, stdev= 3.96, samples=65 lat (usec) : 50=0.26%, 100=4.30%, 250=0.91%, 750=0.13% lat (msec) : 2=3.12%, 4=4.56%, 10=8.46%, 20=8.20%, 50=37.50% lat (msec) : 100=26.17%, 250=6.25%, 500=0.13% cpu : usr=0.09%, sys=6.07%, ctx=1720, 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=722KiB/s (740kB/s), 173KiB/s-192KiB/s (177kB/s-196kB/s), io=23.4MiB (24.5MB), run=32377-33155msec WRITE: bw=760KiB/s (778kB/s), 185KiB/s-197KiB/s (189kB/s-202kB/s), io=24.6MiB (25.8MB), run=32377-33155msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180102: Fri Sep 18 22:29:59 2026 read: IOPS=7, BW=121KiB/s (124kB/s)(5920KiB/48738msec) clat (msec): min=7, max=451, avg=51.55, stdev=42.26 lat (msec): min=7, max=451, avg=51.55, stdev=42.26 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 14], 10.00th=[ 17], 20.00th=[ 23], | 30.00th=[ 28], 40.00th=[ 34], 50.00th=[ 40], 60.00th=[ 48], | 70.00th=[ 58], 80.00th=[ 77], 90.00th=[ 100], 95.00th=[ 128], | 99.00th=[ 184], 99.50th=[ 247], 99.90th=[ 451], 99.95th=[ 451], | 99.99th=[ 451] bw ( KiB/s): min= 30, max= 383, per=24.87%, avg=121.37, stdev=67.98, samples=95 iops : min= 1, max= 23, avg= 6.76, stdev= 4.32, samples=95 write: IOPS=8, BW=131KiB/s (134kB/s)(6368KiB/48738msec); 0 zone resets clat (msec): min=15, max=342, avg=74.37, stdev=47.20 lat (msec): min=15, max=342, avg=74.37, stdev=47.20 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 27], 10.00th=[ 31], 20.00th=[ 41], | 30.00th=[ 46], 40.00th=[ 53], 50.00th=[ 61], 60.00th=[ 68], | 70.00th=[ 85], 80.00th=[ 103], 90.00th=[ 144], 95.00th=[ 167], | 99.00th=[ 247], 99.50th=[ 284], 99.90th=[ 342], 99.95th=[ 342], | 99.99th=[ 342] bw ( KiB/s): min= 31, max= 381, per=25.76%, avg=132.38, stdev=60.29, samples=94 iops : min= 1, max= 23, avg= 7.46, stdev= 3.83, samples=94 lat (msec) : 10=0.78%, 20=7.29%, 50=41.54%, 100=35.03%, 250=14.84% lat (msec) : 500=0.52% cpu : usr=0.05%, sys=1.72%, ctx=1148, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180103: Fri Sep 18 22:29:59 2026 read: IOPS=7, BW=118KiB/s (121kB/s)(5744KiB/48647msec) clat (msec): min=8, max=281, avg=48.07, stdev=37.46 lat (msec): min=8, max=281, avg=48.07, stdev=37.46 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 16], 10.00th=[ 18], 20.00th=[ 22], | 30.00th=[ 26], 40.00th=[ 32], 50.00th=[ 39], 60.00th=[ 45], | 70.00th=[ 52], 80.00th=[ 63], 90.00th=[ 96], 95.00th=[ 136], | 99.00th=[ 180], 99.50th=[ 243], 99.90th=[ 284], 99.95th=[ 284], | 99.99th=[ 284] bw ( KiB/s): min= 30, max= 447, per=25.06%, avg=122.29, stdev=74.13, samples=92 iops : min= 1, max= 27, avg= 6.82, stdev= 4.65, samples=92 write: IOPS=8, BW=135KiB/s (138kB/s)(6544KiB/48647msec); 0 zone resets clat (msec): min=19, max=381, avg=76.41, stdev=47.49 lat (msec): min=19, max=381, avg=76.41, stdev=47.49 clat percentiles (msec): | 1.00th=[ 23], 5.00th=[ 30], 10.00th=[ 32], 20.00th=[ 41], | 30.00th=[ 48], 40.00th=[ 56], 50.00th=[ 62], 60.00th=[ 73], | 70.00th=[ 89], 80.00th=[ 107], 90.00th=[ 136], 95.00th=[ 167], | 99.00th=[ 247], 99.50th=[ 275], 99.90th=[ 384], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 31, max= 347, per=26.06%, avg=133.97, stdev=64.67, samples=96 iops : min= 1, max= 21, avg= 7.55, stdev= 4.13, samples=96 lat (msec) : 10=0.26%, 20=6.64%, 50=42.32%, 100=34.90%, 250=15.23% lat (msec) : 500=0.65% cpu : usr=0.07%, sys=1.98%, ctx=1272, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180104: Fri Sep 18 22:29:59 2026 read: IOPS=7, BW=128KiB/s (131kB/s)(6256KiB/49016msec) clat (msec): min=9, max=282, avg=51.59, stdev=38.56 lat (msec): min=9, max=282, avg=51.60, stdev=38.56 clat percentiles (msec): | 1.00th=[ 12], 5.00th=[ 17], 10.00th=[ 20], 20.00th=[ 25], | 30.00th=[ 29], 40.00th=[ 34], 50.00th=[ 40], 60.00th=[ 47], | 70.00th=[ 55], 80.00th=[ 71], 90.00th=[ 100], 95.00th=[ 138], | 99.00th=[ 186], 99.50th=[ 220], 99.90th=[ 284], 99.95th=[ 284], | 99.99th=[ 284] bw ( KiB/s): min= 31, max= 347, per=26.09%, avg=127.30, stdev=73.89, samples=97 iops : min= 1, max= 21, avg= 7.13, stdev= 4.67, samples=97 write: IOPS=7, BW=123KiB/s (126kB/s)(6032KiB/49016msec); 0 zone resets clat (msec): min=14, max=384, avg=76.08, stdev=46.72 lat (msec): min=14, max=384, avg=76.08, stdev=46.72 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 27], 10.00th=[ 32], 20.00th=[ 41], | 30.00th=[ 49], 40.00th=[ 56], 50.00th=[ 65], 60.00th=[ 77], | 70.00th=[ 87], 80.00th=[ 105], 90.00th=[ 136], 95.00th=[ 163], | 99.00th=[ 249], 99.50th=[ 342], 99.90th=[ 384], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 31, max= 350, per=23.76%, avg=122.10, stdev=63.65, samples=97 iops : min= 1, max= 21, avg= 6.80, stdev= 4.01, samples=97 lat (msec) : 10=0.26%, 20=6.12%, 50=42.19%, 100=35.68%, 250=15.23% lat (msec) : 500=0.52% cpu : usr=0.06%, sys=1.76%, ctx=1272, 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=180106: Fri Sep 18 22:29:59 2026 read: IOPS=7, BW=125KiB/s (128kB/s)(6032KiB/48378msec) clat (msec): min=9, max=468, avg=55.18, stdev=46.77 lat (msec): min=9, max=468, avg=55.20, stdev=46.77 clat percentiles (msec): | 1.00th=[ 13], 5.00th=[ 18], 10.00th=[ 20], 20.00th=[ 24], | 30.00th=[ 30], 40.00th=[ 34], 50.00th=[ 40], 60.00th=[ 48], | 70.00th=[ 56], 80.00th=[ 77], 90.00th=[ 113], 95.00th=[ 157], | 99.00th=[ 213], 99.50th=[ 284], 99.90th=[ 468], 99.95th=[ 468], | 99.99th=[ 468] bw ( KiB/s): min= 31, max= 345, per=25.80%, avg=125.90, stdev=64.48, samples=93 iops : min= 1, max= 21, avg= 7.04, stdev= 4.08, samples=93 write: IOPS=8, BW=129KiB/s (132kB/s)(6256KiB/48378msec); 0 zone resets clat (msec): min=11, max=247, avg=69.77, stdev=40.21 lat (msec): min=11, max=247, avg=69.77, stdev=40.21 clat percentiles (msec): | 1.00th=[ 21], 5.00th=[ 30], 10.00th=[ 33], 20.00th=[ 40], | 30.00th=[ 45], 40.00th=[ 52], 50.00th=[ 57], 60.00th=[ 67], | 70.00th=[ 79], 80.00th=[ 94], 90.00th=[ 125], 95.00th=[ 157], | 99.00th=[ 236], 99.50th=[ 239], 99.90th=[ 249], 99.95th=[ 249], | 99.99th=[ 249] bw ( KiB/s): min= 31, max= 379, per=25.71%, avg=132.15, stdev=65.98, samples=93 iops : min= 1, max= 23, avg= 7.43, stdev= 4.18, samples=93 lat (msec) : 10=0.13%, 20=5.73%, 50=44.92%, 100=33.85%, 250=15.10% lat (msec) : 500=0.26% cpu : usr=0.06%, sys=1.86%, ctx=1232, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=489KiB/s (500kB/s), 118KiB/s-128KiB/s (121kB/s-131kB/s), io=23.4MiB (24.5MB), run=48378-49016msec WRITE: bw=514KiB/s (526kB/s), 123KiB/s-135KiB/s (126kB/s-138kB/s), io=24.6MiB (25.8MB), run=48378-49016msec 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=180123: Fri Sep 18 22:30:16 2026 read: IOPS=1, BW=1528KiB/s (1564kB/s)(7168KiB/4692msec) clat (usec): min=594, max=2682.9k, avg=513354.78, stdev=961086.54 lat (usec): min=595, max=2682.9k, avg=513356.16, stdev=961086.40 clat percentiles (usec): | 1.00th=[ 594], 5.00th=[ 594], 10.00th=[ 594], | 20.00th=[ 105382], 30.00th=[ 143655], 40.00th=[ 143655], | 50.00th=[ 173016], 60.00th=[ 179307], 70.00th=[ 179307], | 80.00th=[ 308282], 90.00th=[2667578], 95.00th=[2667578], | 99.00th=[2667578], 99.50th=[2667578], 99.90th=[2667578], | 99.95th=[2667578], 99.99th=[2667578] bw ( KiB/s): min= 1381, max= 4055, per=94.00%, avg=3145.33, stdev=1528.20, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1091KiB/s (1117kB/s)(5120KiB/4692msec); 0 zone resets clat (msec): min=128, max=325, avg=199.94, stdev=76.52 lat (msec): min=128, max=325, avg=200.02, stdev=76.51 clat percentiles (msec): | 1.00th=[ 129], 5.00th=[ 129], 10.00th=[ 129], 20.00th=[ 129], | 30.00th=[ 155], 40.00th=[ 155], 50.00th=[ 182], 60.00th=[ 182], | 70.00th=[ 211], 80.00th=[ 211], 90.00th=[ 326], 95.00th=[ 326], | 99.00th=[ 326], 99.50th=[ 326], 99.90th=[ 326], 99.95th=[ 326], | 99.99th=[ 326] bw ( KiB/s): min= 2000, max= 4047, per=57.45%, avg=2691.33, stdev=1174.12, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=8.33% lat (msec) : 250=66.67%, 500=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=12.07%, ctx=646, 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=180124: Fri Sep 18 22:30:16 2026 read: IOPS=0, BW=352KiB/s (361kB/s)(2048KiB/5810msec) clat (usec): min=1082, max=297738, avg=149410.53, stdev=209767.73 lat (usec): min=1083, max=297741, avg=149412.49, stdev=209768.64 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1090], 10.00th=[ 1090], 20.00th=[ 1090], | 30.00th=[ 1090], 40.00th=[ 1090], 50.00th=[ 1090], 60.00th=[295699], | 70.00th=[295699], 80.00th=[295699], 90.00th=[295699], 95.00th=[295699], | 99.00th=[295699], 99.50th=[295699], 99.90th=[295699], 99.95th=[295699], | 99.99th=[295699] bw ( KiB/s): min= 1372, max= 2015, per=50.61%, avg=1693.50, stdev=454.67, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1762KiB/s (1805kB/s)(10.0MiB/5810msec); 0 zone resets clat (msec): min=85, max=2947, avg=540.14, stdev=860.86 lat (msec): min=85, max=2947, avg=540.24, stdev=860.86 clat percentiles (msec): | 1.00th=[ 86], 5.00th=[ 86], 10.00th=[ 86], 20.00th=[ 171], | 30.00th=[ 201], 40.00th=[ 211], 50.00th=[ 220], 60.00th=[ 257], | 70.00th=[ 257], 80.00th=[ 376], 90.00th=[ 676], 95.00th=[ 2937], | 99.00th=[ 2937], 99.50th=[ 2937], 99.90th=[ 2937], 99.95th=[ 2937], | 99.99th=[ 2937] bw ( KiB/s): min= 2015, max= 6131, per=78.01%, avg=3655.00, stdev=1716.41, samples=5 iops : min= 1, max= 5, avg= 2.60, stdev= 1.67, samples=5 lat (msec) : 2=8.33%, 100=8.33%, 250=33.33%, 500=33.33%, 750=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=11.65%, ctx=139, 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=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=180125: Fri Sep 18 22:30:16 2026 read: IOPS=0, BW=1004KiB/s (1028kB/s)(6144KiB/6119msec) clat (usec): min=479, max=300677, avg=113751.59, stdev=131485.78 lat (usec): min=480, max=300678, avg=113752.58, stdev=131485.88 clat percentiles (usec): | 1.00th=[ 482], 5.00th=[ 482], 10.00th=[ 482], 20.00th=[ 537], | 30.00th=[ 537], 40.00th=[ 3687], 50.00th=[ 3687], 60.00th=[152044], | 70.00th=[223347], 80.00th=[223347], 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= 2023, max= 4031, per=75.64%, avg=2531.00, stdev=1000.04, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=1004KiB/s (1028kB/s)(6144KiB/6119msec); 0 zone resets clat (msec): min=284, max=3013, avg=900.33, stdev=1046.23 lat (msec): min=284, max=3013, avg=900.40, stdev=1046.24 clat percentiles (msec): | 1.00th=[ 284], 5.00th=[ 284], 10.00th=[ 284], 20.00th=[ 338], | 30.00th=[ 338], 40.00th=[ 518], 50.00th=[ 518], 60.00th=[ 542], | 70.00th=[ 709], 80.00th=[ 709], 90.00th=[ 3004], 95.00th=[ 3004], | 99.00th=[ 3004], 99.50th=[ 3004], 99.90th=[ 3004], 99.95th=[ 3004], | 99.99th=[ 3004] bw ( KiB/s): min= 2015, max= 2745, per=47.12%, avg=2207.50, stdev=358.52, samples=4 iops : min= 1, max= 2, avg= 1.25, stdev= 0.50, samples=4 lat (usec) : 500=8.33%, 750=8.33% lat (msec) : 4=8.33%, 250=16.67%, 500=25.00%, 750=25.00%, >=2000=8.33% cpu : usr=0.00%, sys=7.09%, ctx=155, 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=180126: Fri Sep 18 22:30:16 2026 read: IOPS=0, BW=867KiB/s (888kB/s)(5120KiB/5903msec) clat (usec): min=322, max=281406, avg=57050.47, stdev=125422.46 lat (usec): min=323, max=281407, avg=57051.33, stdev=125422.56 clat percentiles (usec): | 1.00th=[ 322], 5.00th=[ 322], 10.00th=[ 322], 20.00th=[ 322], | 30.00th=[ 355], 40.00th=[ 355], 50.00th=[ 529], 60.00th=[ 529], | 70.00th=[ 2638], 80.00th=[ 2638], 90.00th=[283116], 95.00th=[283116], | 99.00th=[283116], 99.50th=[283116], 99.90th=[283116], 99.95th=[283116], | 99.99th=[283116] bw ( KiB/s): min= 8062, max= 8062, per=100.00%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=1, BW=1214KiB/s (1243kB/s)(7168KiB/5903msec); 0 zone resets clat (msec): min=219, max=2864, avg=789.25, stdev=944.04 lat (msec): min=219, max=2864, avg=789.33, stdev=944.04 clat percentiles (msec): | 1.00th=[ 220], 5.00th=[ 220], 10.00th=[ 220], 20.00th=[ 224], | 30.00th=[ 300], 40.00th=[ 300], 50.00th=[ 405], 60.00th=[ 701], | 70.00th=[ 701], 80.00th=[ 810], 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= 1446, max= 4055, per=61.74%, avg=2892.75, stdev=1362.01, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 lat (usec) : 500=16.67%, 750=8.33% lat (msec) : 4=8.33%, 250=16.67%, 500=25.00%, 750=8.33%, 1000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=7.52%, ctx=149, 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=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=3347KiB/s (3427kB/s), 352KiB/s-1528KiB/s (361kB/s-1564kB/s), io=20.0MiB (20.0MB), run=4692-6119msec WRITE: bw=4686KiB/s (4798kB/s), 1004KiB/s-1762KiB/s (1028kB/s-1805kB/s), io=28.0MiB (29.4MB), run=4692-6119msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180128: Fri Sep 18 22:30:17 2026 read: IOPS=1, BW=1036KiB/s (1061kB/s)(7168KiB/6916msec) clat (msec): min=115, max=2244, avg=765.58, stdev=788.73 lat (msec): min=115, max=2244, avg=765.58, stdev=788.73 clat percentiles (msec): | 1.00th=[ 115], 5.00th=[ 115], 10.00th=[ 115], 20.00th=[ 180], | 30.00th=[ 414], 40.00th=[ 414], 50.00th=[ 447], 60.00th=[ 498], | 70.00th=[ 498], 80.00th=[ 1469], 90.00th=[ 2232], 95.00th=[ 2232], | 99.00th=[ 2232], 99.50th=[ 2232], 99.90th=[ 2232], 99.95th=[ 2232], | 99.99th=[ 2232] bw ( KiB/s): min= 1950, max= 2048, per=68.39%, avg=2025.17, stdev=37.46, samples=6 iops : min= 1, max= 2, avg= 1.33, stdev= 0.52, samples=6 write: IOPS=0, BW=740KiB/s (758kB/s)(5120KiB/6916msec); 0 zone resets clat (msec): min=123, max=430, avg=239.71, stdev=127.29 lat (msec): min=123, max=430, avg=239.80, stdev=127.28 clat percentiles (msec): | 1.00th=[ 124], 5.00th=[ 124], 10.00th=[ 124], 20.00th=[ 124], | 30.00th=[ 132], 40.00th=[ 132], 50.00th=[ 220], 60.00th=[ 220], | 70.00th=[ 292], 80.00th=[ 292], 90.00th=[ 430], 95.00th=[ 430], | 99.00th=[ 430], 99.50th=[ 430], 99.90th=[ 430], 99.95th=[ 430], | 99.99th=[ 430] bw ( KiB/s): min= 2027, max= 6119, per=98.26%, avg=4073.00, stdev=2893.48, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 lat (msec) : 250=41.67%, 500=41.67%, 2000=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=2.11%, ctx=49, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180129: Fri Sep 18 22:30:17 2026 read: IOPS=0, BW=316KiB/s (324kB/s)(2048KiB/6478msec) clat (msec): min=125, max=168, avg=146.76, stdev=30.33 lat (msec): min=125, max=168, avg=146.76, stdev=30.32 clat percentiles (msec): | 1.00th=[ 126], 5.00th=[ 126], 10.00th=[ 126], 20.00th=[ 126], | 30.00th=[ 126], 40.00th=[ 126], 50.00th=[ 126], 60.00th=[ 169], | 70.00th=[ 169], 80.00th=[ 169], 90.00th=[ 169], 95.00th=[ 169], | 99.00th=[ 169], 99.50th=[ 169], 99.90th=[ 169], 99.95th=[ 169], | 99.99th=[ 169] bw ( KiB/s): min= 1741, max= 2048, per=63.98%, avg=1894.50, stdev=217.08, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 write: IOPS=1, BW=1581KiB/s (1619kB/s)(10.0MiB/6478msec); 0 zone resets clat (msec): min=127, max=3209, avg=580.45, stdev=958.85 lat (msec): min=128, max=3209, avg=580.65, stdev=958.82 clat percentiles (msec): | 1.00th=[ 128], 5.00th=[ 128], 10.00th=[ 128], 20.00th=[ 140], | 30.00th=[ 142], 40.00th=[ 169], 50.00th=[ 182], 60.00th=[ 194], | 70.00th=[ 215], 80.00th=[ 468], 90.00th=[ 961], 95.00th=[ 3205], | 99.00th=[ 3205], 99.50th=[ 3205], 99.90th=[ 3205], 99.95th=[ 3205], | 99.99th=[ 3205] bw ( KiB/s): min= 2035, max= 6083, per=98.17%, avg=4069.25, stdev=1652.69, samples=4 iops : min= 1, max= 5, avg= 3.25, stdev= 1.71, samples=4 lat (msec) : 250=75.00%, 500=8.33%, 1000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=5.09%, ctx=102, 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=180130: Fri Sep 18 22:30:17 2026 read: IOPS=0, BW=956KiB/s (979kB/s)(6144KiB/6429msec) clat (msec): min=124, max=678, avg=289.55, stdev=213.99 lat (msec): min=124, max=678, avg=289.55, stdev=213.99 clat percentiles (msec): | 1.00th=[ 125], 5.00th=[ 125], 10.00th=[ 125], 20.00th=[ 138], | 30.00th=[ 138], 40.00th=[ 169], 50.00th=[ 169], 60.00th=[ 239], | 70.00th=[ 388], 80.00th=[ 388], 90.00th=[ 676], 95.00th=[ 676], | 99.00th=[ 676], 99.50th=[ 676], 99.90th=[ 676], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 1950, max= 4096, per=90.88%, avg=2691.00, stdev=1217.37, samples=3 iops : min= 1, max= 4, avg= 2.00, stdev= 1.73, samples=3 write: IOPS=0, BW=956KiB/s (979kB/s)(6144KiB/6429msec); 0 zone resets clat (msec): min=97, max=3357, avg=731.25, stdev=1291.81 lat (msec): min=97, max=3357, avg=731.37, stdev=1291.80 clat percentiles (msec): | 1.00th=[ 99], 5.00th=[ 99], 10.00th=[ 99], 20.00th=[ 110], | 30.00th=[ 110], 40.00th=[ 130], 50.00th=[ 130], 60.00th=[ 305], | 70.00th=[ 388], 80.00th=[ 388], 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= 2007, max= 2043, per=48.94%, avg=2028.60, stdev=13.45, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 100=8.33%, 250=50.00%, 500=25.00%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.55%, ctx=78, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180131: Fri Sep 18 22:30:17 2026 read: IOPS=0, BW=761KiB/s (779kB/s)(5120KiB/6729msec) clat (msec): min=65, max=475, avg=173.77, stdev=170.51 lat (msec): min=65, max=475, avg=173.77, stdev=170.51 clat percentiles (msec): | 1.00th=[ 66], 5.00th=[ 66], 10.00th=[ 66], 20.00th=[ 66], | 30.00th=[ 87], 40.00th=[ 87], 50.00th=[ 114], 60.00th=[ 114], | 70.00th=[ 128], 80.00th=[ 128], 90.00th=[ 477], 95.00th=[ 477], | 99.00th=[ 477], 99.50th=[ 477], 99.90th=[ 477], 99.95th=[ 477], | 99.99th=[ 477] bw ( KiB/s): min= 2048, max= 6095, per=100.00%, avg=4071.50, stdev=2861.66, samples=2 iops : min= 2, max= 5, avg= 3.50, stdev= 2.12, samples=2 write: IOPS=1, BW=1065KiB/s (1091kB/s)(7168KiB/6729msec); 0 zone resets clat (msec): min=122, max=3229, avg=800.86, stdev=1098.95 lat (msec): min=122, max=3229, avg=800.95, stdev=1098.95 clat percentiles (msec): | 1.00th=[ 123], 5.00th=[ 123], 10.00th=[ 123], 20.00th=[ 259], | 30.00th=[ 296], 40.00th=[ 296], 50.00th=[ 338], 60.00th=[ 464], | 70.00th=[ 464], 80.00th=[ 902], 90.00th=[ 3239], 95.00th=[ 3239], | 99.00th=[ 3239], 99.50th=[ 3239], 99.90th=[ 3239], 99.95th=[ 3239], | 99.99th=[ 3239] bw ( KiB/s): min= 1768, max= 6119, per=67.06%, avg=2779.80, stdev=1869.76, samples=5 iops : min= 1, max= 5, avg= 1.80, stdev= 1.79, samples=5 lat (msec) : 100=16.67%, 250=25.00%, 500=41.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=4.19%, ctx=179, 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=2961KiB/s (3032kB/s), 316KiB/s-1036KiB/s (324kB/s-1061kB/s), io=20.0MiB (20.0MB), run=6429-6916msec WRITE: bw=4146KiB/s (4245kB/s), 740KiB/s-1581KiB/s (758kB/s-1619kB/s), io=28.0MiB (29.4MB), run=6429-6916msec 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=180143: Fri Sep 18 22:30:33 2026 read: IOPS=1, BW=5020KiB/s (5140kB/s)(12.0MiB/2448msec) clat (msec): min=605, max=846, avg=730.94, stdev=120.59 lat (msec): min=605, max=846, avg=730.95, stdev=120.59 clat percentiles (msec): | 1.00th=[ 609], 5.00th=[ 609], 10.00th=[ 609], 20.00th=[ 609], | 30.00th=[ 609], 40.00th=[ 743], 50.00th=[ 743], 60.00th=[ 743], | 70.00th=[ 844], 80.00th=[ 844], 90.00th=[ 844], 95.00th=[ 844], | 99.00th=[ 844], 99.50th=[ 844], 99.90th=[ 844], 99.95th=[ 844], | 99.99th=[ 844] bw ( KiB/s): min= 8110, max= 8159, per=100.00%, avg=8134.50, stdev=34.65, 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=12.06%, ctx=295, 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=180144: Fri Sep 18 22:30:33 2026 read: IOPS=0, BW=1287KiB/s (1318kB/s)(4096KiB/3182msec) clat (nsec): min=903413k, max=903413k, avg=903412652.00, stdev= 0.00 lat (nsec): min=903416k, max=903416k, avg=903415884.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 902], 5.00th=[ 902], 10.00th=[ 902], 20.00th=[ 902], | 30.00th=[ 902], 40.00th=[ 902], 50.00th=[ 902], 60.00th=[ 902], | 70.00th=[ 902], 80.00th=[ 902], 90.00th=[ 902], 95.00th=[ 902], | 99.00th=[ 902], 99.50th=[ 902], 99.90th=[ 902], 99.95th=[ 902], | 99.99th=[ 902] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2574KiB/s (2636kB/s)(8192KiB/3182msec); 0 zone resets clat (msec): min=668, max=1490, avg=1079.76, stdev=581.07 lat (msec): min=669, max=1490, avg=1080.09, stdev=581.04 clat percentiles (msec): | 1.00th=[ 667], 5.00th=[ 667], 10.00th=[ 667], 20.00th=[ 667], | 30.00th=[ 667], 40.00th=[ 667], 50.00th=[ 667], 60.00th=[ 1485], | 70.00th=[ 1485], 80.00th=[ 1485], 90.00th=[ 1485], 95.00th=[ 1485], | 99.00th=[ 1485], 99.50th=[ 1485], 99.90th=[ 1485], 99.95th=[ 1485], | 99.99th=[ 1485] bw ( KiB/s): min= 8159, max= 8159, per=79.24%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.50%, ctx=105, 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=180145: Fri Sep 18 22:30:33 2026 write: IOPS=0, BW=3901KiB/s (3995kB/s)(12.0MiB/3150msec); 0 zone resets clat (msec): min=255, max=1453, avg=988.60, stdev=642.72 lat (msec): min=255, max=1455, avg=989.40, stdev=643.23 clat percentiles (msec): | 1.00th=[ 255], 5.00th=[ 255], 10.00th=[ 255], 20.00th=[ 255], | 30.00th=[ 255], 40.00th=[ 1250], 50.00th=[ 1250], 60.00th=[ 1250], | 70.00th=[ 1452], 80.00th=[ 1452], 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= 8159, max= 8159, per=79.24%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.68%, ctx=49, 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=180146: Fri Sep 18 22:30:33 2026 write: IOPS=1, BW=4412KiB/s (4518kB/s)(12.0MiB/2785msec); 0 zone resets clat (msec): min=303, max=1792, avg=890.23, stdev=793.03 lat (msec): min=304, max=1795, avg=891.30, stdev=794.30 clat percentiles (msec): | 1.00th=[ 305], 5.00th=[ 305], 10.00th=[ 305], 20.00th=[ 305], | 30.00th=[ 305], 40.00th=[ 575], 50.00th=[ 575], 60.00th=[ 575], | 70.00th=[ 1787], 80.00th=[ 1787], 90.00th=[ 1787], 95.00th=[ 1787], | 99.00th=[ 1787], 99.50th=[ 1787], 99.90th=[ 1787], 99.95th=[ 1787], | 99.99th=[ 1787] bw ( KiB/s): min= 7953, max= 8159, per=78.24%, avg=8056.00, stdev=145.66, 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=3.12%, ctx=44, 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=5149KiB/s (5273kB/s), 1287KiB/s-5020KiB/s (1318kB/s-5140kB/s), io=16.0MiB (16.8MB), run=2448-3182msec WRITE: bw=10.1MiB/s (10.5MB/s), 2574KiB/s-4412KiB/s (2636kB/s-4518kB/s), io=32.0MiB (33.6MB), run=2785-3182msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180139: Fri Sep 18 22:30:33 2026 read: IOPS=2, BW=8891KiB/s (9105kB/s)(12.0MiB/1382msec) clat (msec): min=392, max=500, avg=429.87, stdev=61.18 lat (msec): min=392, max=500, avg=429.88, stdev=61.18 clat percentiles (msec): | 1.00th=[ 393], 5.00th=[ 393], 10.00th=[ 393], 20.00th=[ 393], | 30.00th=[ 393], 40.00th=[ 397], 50.00th=[ 397], 60.00th=[ 397], | 70.00th=[ 502], 80.00th=[ 502], 90.00th=[ 502], 95.00th=[ 502], | 99.00th=[ 502], 99.50th=[ 502], 99.90th=[ 502], 99.95th=[ 502], | 99.99th=[ 502] bw ( KiB/s): min= 6660, max= 8062, per=100.00%, avg=7361.00, stdev=991.36, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=66.67%, 750=33.33% cpu : usr=0.00%, sys=7.10%, ctx=55, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180140: Fri Sep 18 22:30:33 2026 read: IOPS=0, BW=1221KiB/s (1251kB/s)(4096KiB/3354msec) clat (nsec): min=1665.5M, max=1665.5M, avg=1665543094.00, stdev= 0.00 lat (nsec): min=1665.5M, max=1665.5M, avg=1665545481.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1670], 5.00th=[ 1670], 10.00th=[ 1670], 20.00th=[ 1670], | 30.00th=[ 1670], 40.00th=[ 1670], 50.00th=[ 1670], 60.00th=[ 1670], | 70.00th=[ 1670], 80.00th=[ 1670], 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= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2442KiB/s (2501kB/s)(8192KiB/3354msec); 0 zone resets clat (msec): min=642, max=735, avg=688.52, stdev=65.79 lat (msec): min=642, max=735, avg=688.86, stdev=65.77 clat percentiles (msec): | 1.00th=[ 642], 5.00th=[ 642], 10.00th=[ 642], 20.00th=[ 642], | 30.00th=[ 642], 40.00th=[ 642], 50.00th=[ 642], 60.00th=[ 735], | 70.00th=[ 735], 80.00th=[ 735], 90.00th=[ 735], 95.00th=[ 735], | 99.00th=[ 735], 99.50th=[ 735], 99.90th=[ 735], 99.95th=[ 735], | 99.99th=[ 735] bw ( KiB/s): min= 8159, max= 8159, per=83.52%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.00%, sys=3.37%, ctx=65, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180141: Fri Sep 18 22:30:33 2026 write: IOPS=1, BW=4132KiB/s (4231kB/s)(12.0MiB/2974msec); 0 zone resets clat (msec): min=617, max=1191, avg=966.24, stdev=306.47 lat (msec): min=617, max=1191, avg=966.56, stdev=306.41 clat percentiles (msec): | 1.00th=[ 617], 5.00th=[ 617], 10.00th=[ 617], 20.00th=[ 617], | 30.00th=[ 617], 40.00th=[ 1083], 50.00th=[ 1083], 60.00th=[ 1083], | 70.00th=[ 1183], 80.00th=[ 1183], 90.00th=[ 1183], 95.00th=[ 1183], | 99.00th=[ 1183], 99.50th=[ 1183], 99.90th=[ 1183], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 8094, max= 8159, per=83.19%, avg=8126.50, stdev=45.96, 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=5.01%, ctx=61, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180142: Fri Sep 18 22:30:33 2026 write: IOPS=1, BW=4903KiB/s (5021kB/s)(12.0MiB/2506msec); 0 zone resets clat (msec): min=423, max=1044, avg=804.60, stdev=333.42 lat (msec): min=424, max=1044, avg=805.65, stdev=333.36 clat percentiles (msec): | 1.00th=[ 426], 5.00th=[ 426], 10.00th=[ 426], 20.00th=[ 426], | 30.00th=[ 426], 40.00th=[ 944], 50.00th=[ 944], 60.00th=[ 944], | 70.00th=[ 1045], 80.00th=[ 1045], 90.00th=[ 1045], 95.00th=[ 1045], | 99.00th=[ 1045], 99.50th=[ 1045], 99.90th=[ 1045], 99.95th=[ 1045], | 99.99th=[ 1045] bw ( KiB/s): min= 6692, max= 8015, per=75.27%, avg=7353.50, stdev=935.50, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.55%, ctx=65, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=4885KiB/s (5002kB/s), 1221KiB/s-8891KiB/s (1251kB/s-9105kB/s), io=16.0MiB (16.8MB), run=1382-3354msec WRITE: bw=9770KiB/s (10.0MB/s), 2442KiB/s-4903KiB/s (2501kB/s-5021kB/s), io=32.0MiB (33.6MB), run=2506-3354msec