== sanity test 398b: DIO and buffer IO race ============== 19:30:09 (1786836609) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 2.95569 s, 17.0 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=180373: Sat Aug 15 19:31:24 2026 read: IOPS=23, BW=92.7KiB/s (94.9kB/s)(5992KiB/64653msec) clat (usec): min=29, max=799430, avg=24302.86, stdev=24455.90 lat (usec): min=30, max=799432, avg=24306.04, stdev=24455.34 clat percentiles (usec): | 1.00th=[ 109], 5.00th=[ 8586], 10.00th=[ 10159], 20.00th=[ 13042], | 30.00th=[ 15664], 40.00th=[ 17957], 50.00th=[ 21103], 60.00th=[ 24511], | 70.00th=[ 27919], 80.00th=[ 32900], 90.00th=[ 40109], 95.00th=[ 47449], | 99.00th=[ 74974], 99.50th=[ 88605], 99.90th=[137364], 99.95th=[801113], | 99.99th=[801113] bw ( KiB/s): min= 31, max= 224, per=24.99%, avg=92.72, stdev=26.47, samples=127 iops : min= 7, max= 56, avg=22.74, stdev= 6.66, samples=127 write: IOPS=24, BW=97.4KiB/s (99.7kB/s)(6296KiB/64653msec); 0 zone resets clat (usec): min=789, max=111942, avg=17884.49, stdev=15067.03 lat (usec): min=789, max=111944, avg=17888.81, stdev=15068.42 clat percentiles (usec): | 1.00th=[ 1254], 5.00th=[ 1975], 10.00th=[ 2737], 20.00th=[ 4015], | 30.00th=[ 6390], 40.00th=[ 10552], 50.00th=[ 14222], 60.00th=[ 18482], | 70.00th=[ 23725], 80.00th=[ 29754], 90.00th=[ 37487], 95.00th=[ 45351], | 99.00th=[ 66323], 99.50th=[ 74974], 99.90th=[111674], 99.95th=[111674], | 99.99th=[111674] bw ( KiB/s): min= 31, max= 200, per=25.05%, avg=97.20, stdev=30.15, samples=127 iops : min= 7, max= 50, avg=23.86, stdev= 7.60, samples=127 lat (usec) : 50=0.07%, 100=0.26%, 250=0.59%, 1000=0.10% lat (msec) : 2=2.64%, 4=7.52%, 10=13.54%, 20=30.37%, 50=41.28% lat (msec) : 100=3.45%, 250=0.16%, 1000=0.03% cpu : usr=0.13%, sys=16.46%, ctx=8773, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180374: Sat Aug 15 19:31:24 2026 read: IOPS=23, BW=92.7KiB/s (94.9kB/s)(5940KiB/64075msec) clat (usec): min=38, max=846829, avg=23528.44, stdev=24630.67 lat (usec): min=39, max=846830, avg=23529.43, stdev=24630.66 clat percentiles (usec): | 1.00th=[ 79], 5.00th=[ 8455], 10.00th=[ 10552], 20.00th=[ 13042], | 30.00th=[ 15664], 40.00th=[ 18482], 50.00th=[ 20841], 60.00th=[ 23725], | 70.00th=[ 27132], 80.00th=[ 31589], 90.00th=[ 39060], 95.00th=[ 45351], | 99.00th=[ 65799], 99.50th=[ 72877], 99.90th=[ 91751], 99.95th=[843056], | 99.99th=[843056] bw ( KiB/s): min= 16, max= 168, per=25.04%, avg=92.90, stdev=24.60, samples=126 iops : min= 4, max= 42, avg=22.78, stdev= 6.17, samples=126 write: IOPS=24, BW=99.1KiB/s (101kB/s)(6348KiB/64075msec); 0 zone resets clat (usec): min=879, max=92317, avg=18303.44, stdev=15403.32 lat (usec): min=879, max=92319, avg=18305.56, stdev=15402.53 clat percentiles (usec): | 1.00th=[ 1188], 5.00th=[ 1893], 10.00th=[ 2606], 20.00th=[ 3851], | 30.00th=[ 7046], 40.00th=[11338], 50.00th=[15008], 60.00th=[18744], | 70.00th=[23462], 80.00th=[29754], 90.00th=[40109], 95.00th=[46924], | 99.00th=[68682], 99.50th=[76022], 99.90th=[91751], 99.95th=[92799], | 99.99th=[92799] bw ( KiB/s): min= 40, max= 184, per=25.51%, avg=98.98, stdev=32.05, samples=126 iops : min= 10, max= 46, avg=24.30, stdev= 8.07, samples=126 lat (usec) : 50=0.07%, 100=0.68%, 250=0.39%, 500=0.03%, 1000=0.16% lat (msec) : 2=2.67%, 4=7.81%, 10=10.97%, 20=32.16%, 50=41.44% lat (msec) : 100=3.58%, 1000=0.03% cpu : usr=0.12%, sys=16.62%, ctx=8380, 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=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=180375: Sat Aug 15 19:31:24 2026 read: IOPS=23, BW=94.0KiB/s (97.3kB/s)(6028KiB/63460msec) clat (usec): min=35, max=136273, avg=22576.70, stdev=13153.92 lat (usec): min=36, max=136274, avg=22577.90, stdev=13154.13 clat percentiles (usec): | 1.00th=[ 79], 5.00th=[ 7439], 10.00th=[ 10028], 20.00th=[ 12387], | 30.00th=[ 14877], 40.00th=[ 17171], 50.00th=[ 19792], 60.00th=[ 22938], | 70.00th=[ 26870], 80.00th=[ 32375], 90.00th=[ 39584], 95.00th=[ 45876], | 99.00th=[ 64226], 99.50th=[ 68682], 99.90th=[ 99091], 99.95th=[135267], | 99.99th=[135267] bw ( KiB/s): min= 23, max= 167, per=25.73%, avg=95.44, stdev=25.93, samples=125 iops : min= 5, max= 41, avg=23.42, stdev= 6.54, samples=125 write: IOPS=24, BW=98.6KiB/s (101kB/s)(6260KiB/63460msec); 0 zone resets clat (usec): min=862, max=859236, avg=18760.85, stdev=26290.17 lat (usec): min=863, max=859238, avg=18762.13, stdev=26290.19 clat percentiles (usec): | 1.00th=[ 1188], 5.00th=[ 2024], 10.00th=[ 2671], 20.00th=[ 4047], | 30.00th=[ 6718], 40.00th=[ 10945], 50.00th=[ 14877], 60.00th=[ 18744], | 70.00th=[ 23200], 80.00th=[ 28967], 90.00th=[ 39584], 95.00th=[ 48497], | 99.00th=[ 65799], 99.50th=[ 81265], 99.90th=[109577], 99.95th=[859833], | 99.99th=[859833] bw ( KiB/s): min= 31, max= 176, per=25.48%, avg=98.87, stdev=27.22, samples=125 iops : min= 7, max= 44, avg=24.28, stdev= 6.87, samples=125 lat (usec) : 50=0.13%, 100=0.75%, 250=0.91%, 500=0.03%, 750=0.03% lat (usec) : 1000=0.13% lat (msec) : 2=2.47%, 4=7.55%, 10=12.04%, 20=33.33%, 50=38.54% lat (msec) : 100=3.91%, 250=0.13%, 1000=0.03% cpu : usr=0.11%, sys=16.49%, ctx=8459, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180376: Sat Aug 15 19:31:24 2026 read: IOPS=23, BW=93.9KiB/s (96.2kB/s)(6052KiB/64427msec) clat (usec): min=39, max=124465, avg=22941.45, stdev=13540.42 lat (usec): min=40, max=124466, avg=22942.64, stdev=13540.25 clat percentiles (usec): | 1.00th=[ 82], 5.00th=[ 7701], 10.00th=[ 10159], 20.00th=[ 12649], | 30.00th=[ 15139], 40.00th=[ 17695], 50.00th=[ 20579], 60.00th=[ 23725], | 70.00th=[ 26870], 80.00th=[ 31327], 90.00th=[ 38536], 95.00th=[ 47449], | 99.00th=[ 68682], 99.50th=[ 76022], 99.90th=[113771], 99.95th=[124257], | 99.99th=[124257] bw ( KiB/s): min= 24, max= 192, per=25.44%, avg=94.37, stdev=26.27, samples=127 iops : min= 6, max= 48, avg=23.15, stdev= 6.63, samples=127 write: IOPS=24, BW=96.8KiB/s (99.1kB/s)(6236KiB/64427msec); 0 zone resets clat (usec): min=855, max=859805, avg=19012.51, stdev=26638.50 lat (usec): min=855, max=859807, avg=19013.83, stdev=26638.51 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1942], 10.00th=[ 2704], 20.00th=[ 4015], | 30.00th=[ 6718], 40.00th=[ 10814], 50.00th=[ 14615], 60.00th=[ 18744], | 70.00th=[ 23462], 80.00th=[ 30278], 90.00th=[ 40109], 95.00th=[ 50070], | 99.00th=[ 68682], 99.50th=[ 78119], 99.90th=[115868], 99.95th=[859833], | 99.99th=[859833] bw ( KiB/s): min= 23, max= 184, per=25.02%, avg=97.06, stdev=28.94, samples=127 iops : min= 5, max= 46, avg=23.83, stdev= 7.22, samples=127 lat (usec) : 50=0.07%, 100=0.75%, 250=0.91%, 500=0.07%, 1000=0.16% lat (msec) : 2=2.60%, 4=7.32%, 10=12.08%, 20=31.61%, 50=40.04% lat (msec) : 100=4.10%, 250=0.26%, 1000=0.03% cpu : usr=0.15%, sys=16.29%, ctx=8547, 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=371KiB/s (380kB/s), 92.7KiB/s-94.0KiB/s (94.9kB/s-97.3kB/s), io=23.4MiB (24.6MB), run=63460-64653msec WRITE: bw=389KiB/s (398kB/s), 96.8KiB/s-99.1KiB/s (99.1kB/s-101kB/s), io=24.6MiB (25.7MB), run=63460-64653msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180368: Sat Aug 15 19:31:40 2026 read: IOPS=18, BW=74.4KiB/s (76.2kB/s)(5992KiB/80530msec) clat (msec): min=3, max=831, avg=22.26, stdev=27.37 lat (msec): min=3, max=831, avg=22.26, stdev=27.37 clat percentiles (msec): | 1.00th=[ 5], 5.00th=[ 6], 10.00th=[ 7], 20.00th=[ 9], | 30.00th=[ 11], 40.00th=[ 14], 50.00th=[ 16], 60.00th=[ 20], | 70.00th=[ 24], 80.00th=[ 33], 90.00th=[ 48], 95.00th=[ 58], | 99.00th=[ 88], 99.50th=[ 99], 99.90th=[ 124], 99.95th=[ 835], | 99.99th=[ 835] bw ( KiB/s): min= 8, max= 248, per=25.17%, avg=75.01, stdev=45.89, samples=158 iops : min= 2, max= 62, avg=18.32, stdev=11.57, samples=158 write: IOPS=19, BW=78.2KiB/s (80.1kB/s)(6296KiB/80530msec); 0 zone resets clat (msec): min=6, max=164, avg=29.84, stdev=19.91 lat (msec): min=6, max=164, avg=29.84, stdev=19.91 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 24], 60.00th=[ 30], | 70.00th=[ 35], 80.00th=[ 44], 90.00th=[ 58], 95.00th=[ 69], | 99.00th=[ 100], 99.50th=[ 106], 99.90th=[ 138], 99.95th=[ 165], | 99.99th=[ 165] bw ( KiB/s): min= 7, max= 240, per=25.08%, avg=78.26, stdev=44.46, samples=159 iops : min= 1, max= 60, avg=19.13, stdev=11.20, samples=159 lat (msec) : 4=0.07%, 10=15.59%, 20=36.33%, 50=36.30%, 100=11.00% lat (msec) : 250=0.68%, 1000=0.03% cpu : usr=0.11%, sys=7.93%, ctx=5844, 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=180369: Sat Aug 15 19:31:40 2026 read: IOPS=18, BW=73.8KiB/s (75.6kB/s)(5940KiB/80461msec) clat (msec): min=3, max=885, avg=21.84, stdev=28.86 lat (msec): min=3, max=885, avg=21.84, stdev=28.86 clat percentiles (msec): | 1.00th=[ 5], 5.00th=[ 6], 10.00th=[ 7], 20.00th=[ 9], | 30.00th=[ 11], 40.00th=[ 14], 50.00th=[ 16], 60.00th=[ 19], | 70.00th=[ 23], 80.00th=[ 30], 90.00th=[ 45], 95.00th=[ 58], | 99.00th=[ 96], 99.50th=[ 117], 99.90th=[ 163], 99.95th=[ 885], | 99.99th=[ 885] bw ( KiB/s): min= 7, max= 264, per=24.83%, avg=73.98, stdev=46.21, samples=159 iops : min= 1, max= 66, avg=18.06, stdev=11.66, samples=159 write: IOPS=19, BW=78.9KiB/s (80.8kB/s)(6348KiB/80461msec); 0 zone resets clat (msec): min=5, max=129, avg=30.13, stdev=19.20 lat (msec): min=5, max=129, avg=30.13, stdev=19.20 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 31], | 70.00th=[ 37], 80.00th=[ 45], 90.00th=[ 57], 95.00th=[ 67], | 99.00th=[ 94], 99.50th=[ 113], 99.90th=[ 123], 99.95th=[ 130], | 99.99th=[ 130] bw ( KiB/s): min= 7, max= 264, per=25.32%, avg=79.01, stdev=43.55, samples=159 iops : min= 1, max= 66, avg=19.31, stdev=10.95, samples=159 lat (msec) : 4=0.10%, 10=15.72%, 20=35.68%, 50=37.17%, 100=10.58% lat (msec) : 250=0.72%, 1000=0.03% cpu : usr=0.12%, sys=7.98%, ctx=5946, 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=180370: Sat Aug 15 19:31:40 2026 read: IOPS=18, BW=75.3KiB/s (77.1kB/s)(6028KiB/80091msec) clat (msec): min=3, max=165, avg=21.91, stdev=18.54 lat (msec): min=3, max=165, avg=21.91, stdev=18.54 clat percentiles (msec): | 1.00th=[ 5], 5.00th=[ 6], 10.00th=[ 7], 20.00th=[ 9], | 30.00th=[ 11], 40.00th=[ 14], 50.00th=[ 16], 60.00th=[ 19], | 70.00th=[ 24], 80.00th=[ 32], 90.00th=[ 48], 95.00th=[ 61], | 99.00th=[ 88], 99.50th=[ 104], 99.90th=[ 132], 99.95th=[ 167], | 99.99th=[ 167] bw ( KiB/s): min= 23, max= 328, per=25.47%, avg=75.90, stdev=45.97, samples=157 iops : min= 5, max= 82, avg=18.54, stdev=11.56, samples=157 write: IOPS=19, BW=78.2KiB/s (80.0kB/s)(6260KiB/80091msec); 0 zone resets clat (msec): min=6, max=895, avg=29.95, stdev=29.02 lat (msec): min=6, max=895, avg=29.96, stdev=29.02 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 36], 80.00th=[ 44], 90.00th=[ 56], 95.00th=[ 67], | 99.00th=[ 89], 99.50th=[ 117], 99.90th=[ 171], 99.95th=[ 894], | 99.99th=[ 894] bw ( KiB/s): min= 15, max= 248, per=25.09%, avg=78.29, stdev=46.56, samples=158 iops : min= 3, max= 62, avg=19.14, stdev=11.72, samples=158 lat (msec) : 4=0.26%, 10=15.95%, 20=35.48%, 50=37.01%, 100=10.58% lat (msec) : 250=0.68%, 1000=0.03% cpu : usr=0.08%, sys=8.12%, ctx=5894, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180371: Sat Aug 15 19:31:40 2026 read: IOPS=18, BW=75.4KiB/s (77.2kB/s)(6052KiB/80301msec) clat (msec): min=3, max=122, avg=21.29, stdev=17.53 lat (msec): min=3, max=122, avg=21.29, stdev=17.53 clat percentiles (msec): | 1.00th=[ 5], 5.00th=[ 6], 10.00th=[ 7], 20.00th=[ 9], | 30.00th=[ 11], 40.00th=[ 13], 50.00th=[ 16], 60.00th=[ 18], | 70.00th=[ 22], 80.00th=[ 31], 90.00th=[ 46], 95.00th=[ 58], | 99.00th=[ 85], 99.50th=[ 105], 99.90th=[ 118], 99.95th=[ 124], | 99.99th=[ 124] bw ( KiB/s): min= 7, max= 272, per=25.43%, avg=75.79, stdev=46.38, samples=157 iops : min= 1, max= 68, avg=18.52, stdev=11.68, samples=157 write: IOPS=19, BW=77.7KiB/s (79.5kB/s)(6236KiB/80301msec); 0 zone resets clat (msec): min=6, max=895, avg=30.72, stdev=29.26 lat (msec): min=6, max=895, avg=30.72, stdev=29.26 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 31], | 70.00th=[ 37], 80.00th=[ 45], 90.00th=[ 56], 95.00th=[ 68], | 99.00th=[ 97], 99.50th=[ 113], 99.90th=[ 136], 99.95th=[ 894], | 99.99th=[ 894] bw ( KiB/s): min= 15, max= 232, per=24.90%, avg=77.70, stdev=43.93, samples=158 iops : min= 3, max= 58, avg=18.99, stdev=11.05, samples=158 lat (msec) : 4=0.10%, 10=15.36%, 20=36.52%, 50=36.62%, 100=10.64% lat (msec) : 250=0.72%, 1000=0.03% cpu : usr=0.09%, sys=8.04%, ctx=5920, 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=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=298KiB/s (305kB/s), 73.8KiB/s-75.4KiB/s (75.6kB/s-77.2kB/s), io=23.4MiB (24.6MB), run=80091-80530msec WRITE: bw=312KiB/s (320kB/s), 77.7KiB/s-78.9KiB/s (79.5kB/s-80.8kB/s), io=24.6MiB (25.7MB), run=80091-80530msec 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=180408: Sat Aug 15 19:32:05 2026 read: IOPS=20, BW=324KiB/s (332kB/s)(5920KiB/18246msec) clat (usec): min=52, max=106037, avg=25393.61, stdev=15776.69 lat (usec): min=53, max=106038, avg=25395.12, stdev=15776.57 clat percentiles (usec): | 1.00th=[ 56], 5.00th=[ 105], 10.00th=[ 9503], 20.00th=[ 14353], | 30.00th=[ 17171], 40.00th=[ 19792], 50.00th=[ 23200], 60.00th=[ 27132], | 70.00th=[ 30016], 80.00th=[ 35390], 90.00th=[ 45351], 95.00th=[ 54264], | 99.00th=[ 72877], 99.50th=[ 94897], 99.90th=[106431], 99.95th=[106431], | 99.99th=[106431] bw ( KiB/s): min= 159, max= 539, per=24.76%, avg=321.09, stdev=84.14, samples=35 iops : min= 9, max= 33, avg=19.46, stdev= 5.38, samples=35 write: IOPS=21, BW=349KiB/s (357kB/s)(6368KiB/18246msec); 0 zone resets clat (usec): min=1329, max=121188, avg=22133.31, stdev=18028.47 lat (usec): min=1331, max=121189, avg=22135.59, stdev=18029.53 clat percentiles (usec): | 1.00th=[ 1483], 5.00th=[ 3195], 10.00th=[ 4146], 20.00th=[ 6194], | 30.00th=[ 10421], 40.00th=[ 14484], 50.00th=[ 18220], 60.00th=[ 22152], | 70.00th=[ 27919], 80.00th=[ 34866], 90.00th=[ 45351], 95.00th=[ 55837], | 99.00th=[ 91751], 99.50th=[119014], 99.90th=[121111], 99.95th=[121111], | 99.99th=[121111] bw ( KiB/s): min= 96, max= 479, per=25.50%, avg=348.06, stdev=90.11, samples=35 iops : min= 6, max= 29, avg=21.14, stdev= 5.43, samples=35 lat (usec) : 100=2.08%, 250=1.69%, 500=0.26% lat (msec) : 2=1.17%, 4=3.52%, 10=11.33%, 20=28.65%, 50=44.40% lat (msec) : 100=6.51%, 250=0.39% cpu : usr=0.14%, sys=17.03%, ctx=2256, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180409: Sat Aug 15 19:32:05 2026 read: IOPS=19, BW=311KiB/s (319kB/s)(5744KiB/18459msec) clat (usec): min=57, max=155534, avg=26604.24, stdev=16592.29 lat (usec): min=58, max=155535, avg=26605.92, stdev=16592.37 clat percentiles (usec): | 1.00th=[ 64], 5.00th=[ 167], 10.00th=[ 12256], 20.00th=[ 15008], | 30.00th=[ 18482], 40.00th=[ 20841], 50.00th=[ 23200], 60.00th=[ 27657], | 70.00th=[ 30802], 80.00th=[ 36439], 90.00th=[ 45876], 95.00th=[ 55313], | 99.00th=[ 69731], 99.50th=[130548], 99.90th=[156238], 99.95th=[156238], | 99.99th=[156238] bw ( KiB/s): min= 128, max= 507, per=23.79%, avg=308.61, stdev=94.09, samples=36 iops : min= 8, max= 31, avg=18.67, stdev= 5.89, samples=36 write: IOPS=22, BW=355KiB/s (363kB/s)(6544KiB/18459msec); 0 zone resets clat (usec): min=1516, max=118724, avg=21726.53, stdev=17837.13 lat (usec): min=1519, max=118726, avg=21736.38, stdev=17843.48 clat percentiles (usec): | 1.00th=[ 1991], 5.00th=[ 2769], 10.00th=[ 3982], 20.00th=[ 5800], | 30.00th=[ 9896], 40.00th=[ 14222], 50.00th=[ 17433], 60.00th=[ 22414], | 70.00th=[ 27657], 80.00th=[ 34341], 90.00th=[ 44827], 95.00th=[ 55313], | 99.00th=[ 78119], 99.50th=[104334], 99.90th=[119014], 99.95th=[119014], | 99.99th=[119014] bw ( KiB/s): min= 96, max= 702, per=25.73%, avg=351.19, stdev=123.91, samples=36 iops : min= 6, max= 43, avg=21.33, stdev= 7.73, samples=36 lat (usec) : 100=1.30%, 250=1.30%, 750=0.13% lat (msec) : 2=0.65%, 4=4.82%, 10=11.33%, 20=27.21%, 50=46.22% lat (msec) : 100=6.38%, 250=0.65% cpu : usr=0.16%, sys=17.64%, ctx=2372, 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=180410: Sat Aug 15 19:32:05 2026 read: IOPS=21, BW=347KiB/s (356kB/s)(6256KiB/18020msec) clat (usec): min=37, max=83034, avg=25104.59, stdev=14815.93 lat (usec): min=38, max=83036, avg=25105.96, stdev=14816.15 clat percentiles (usec): | 1.00th=[ 61], 5.00th=[ 119], 10.00th=[ 9503], 20.00th=[14484], | 30.00th=[17433], 40.00th=[20841], 50.00th=[23462], 60.00th=[27919], | 70.00th=[31065], 80.00th=[34341], 90.00th=[40109], 95.00th=[52167], | 99.00th=[76022], 99.50th=[80217], 99.90th=[83362], 99.95th=[83362], | 99.99th=[83362] bw ( KiB/s): min= 191, max= 480, per=26.88%, avg=348.69, stdev=80.23, samples=35 iops : min= 11, max= 30, avg=21.17, stdev= 5.00, samples=35 write: IOPS=20, BW=335KiB/s (343kB/s)(6032KiB/18020msec); 0 zone resets clat (usec): min=1417, max=162252, avg=21702.19, stdev=18412.53 lat (usec): min=1420, max=162256, avg=21704.51, stdev=18412.65 clat percentiles (usec): | 1.00th=[ 1811], 5.00th=[ 2835], 10.00th=[ 4146], 20.00th=[ 6587], | 30.00th=[ 9896], 40.00th=[ 12911], 50.00th=[ 17171], 60.00th=[ 22152], | 70.00th=[ 26346], 80.00th=[ 35914], 90.00th=[ 44303], 95.00th=[ 52691], | 99.00th=[ 89654], 99.50th=[100140], 99.90th=[162530], 99.95th=[162530], | 99.99th=[162530] bw ( KiB/s): min= 128, max= 542, per=24.12%, avg=329.29, stdev=81.39, samples=35 iops : min= 8, max= 33, avg=19.97, stdev= 5.06, samples=35 lat (usec) : 50=0.13%, 100=1.69%, 250=2.60% lat (msec) : 2=1.04%, 4=3.78%, 10=11.33%, 20=27.34%, 50=45.96% lat (msec) : 100=5.99%, 250=0.13% cpu : usr=0.13%, sys=17.53%, ctx=2359, 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=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=180411: Sat Aug 15 19:32:05 2026 read: IOPS=20, BW=331KiB/s (339kB/s)(6032KiB/18207msec) clat (usec): min=49, max=94266, avg=24428.00, stdev=15163.10 lat (usec): min=51, max=94267, avg=24429.53, stdev=15163.11 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 100], 10.00th=[ 3654], 20.00th=[13304], | 30.00th=[16450], 40.00th=[19792], 50.00th=[23200], 60.00th=[26870], | 70.00th=[29492], 80.00th=[33817], 90.00th=[43254], 95.00th=[55837], | 99.00th=[66323], 99.50th=[86508], 99.90th=[93848], 99.95th=[93848], | 99.99th=[93848] bw ( KiB/s): min= 159, max= 507, per=25.45%, avg=330.09, stdev=94.85, samples=35 iops : min= 9, max= 31, avg=20.03, stdev= 5.95, samples=35 write: IOPS=21, BW=344KiB/s (352kB/s)(6256KiB/18207msec); 0 zone resets clat (usec): min=1324, max=133980, avg=22953.18, stdev=19954.31 lat (usec): min=1325, max=133982, avg=22955.10, stdev=19954.38 clat percentiles (usec): | 1.00th=[ 1598], 5.00th=[ 2966], 10.00th=[ 3982], 20.00th=[ 6456], | 30.00th=[ 10683], 40.00th=[ 14222], 50.00th=[ 17957], 60.00th=[ 23200], | 70.00th=[ 28181], 80.00th=[ 35390], 90.00th=[ 46400], 95.00th=[ 61080], | 99.00th=[104334], 99.50th=[124257], 99.90th=[133694], 99.95th=[133694], | 99.99th=[133694] bw ( KiB/s): min= 189, max= 574, per=25.14%, avg=343.20, stdev=97.96, samples=35 iops : min= 11, max= 35, avg=20.86, stdev= 6.15, samples=35 lat (usec) : 50=0.13%, 100=2.34%, 250=1.95%, 500=0.13% lat (msec) : 2=1.43%, 4=4.17%, 10=10.55%, 20=26.17%, 50=45.44% lat (msec) : 100=7.16%, 250=0.52% cpu : usr=0.09%, sys=17.08%, ctx=2354, 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=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=1298KiB/s (1329kB/s), 311KiB/s-347KiB/s (319kB/s-356kB/s), io=23.4MiB (24.5MB), run=18020-18459msec WRITE: bw=1365KiB/s (1398kB/s), 335KiB/s-355KiB/s (343kB/s-363kB/s), io=24.6MiB (25.8MB), run=18020-18459msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180403: Sat Aug 15 19:32:09 2026 read: IOPS=16, BW=260KiB/s (266kB/s)(5920KiB/22808msec) clat (msec): min=4, max=131, avg=24.60, stdev=19.37 lat (msec): min=4, max=131, avg=24.61, stdev=19.37 clat percentiles (msec): | 1.00th=[ 5], 5.00th=[ 8], 10.00th=[ 9], 20.00th=[ 12], | 30.00th=[ 14], 40.00th=[ 16], 50.00th=[ 18], 60.00th=[ 21], | 70.00th=[ 26], 80.00th=[ 35], 90.00th=[ 54], 95.00th=[ 68], | 99.00th=[ 86], 99.50th=[ 131], 99.90th=[ 132], 99.95th=[ 132], | 99.99th=[ 132] bw ( KiB/s): min= 31, max= 672, per=24.33%, avg=255.51, stdev=142.95, samples=45 iops : min= 1, max= 42, avg=15.40, stdev= 9.06, samples=45 write: IOPS=17, BW=279KiB/s (286kB/s)(6368KiB/22808msec); 0 zone resets clat (msec): min=6, max=223, avg=34.34, stdev=24.84 lat (msec): min=6, max=223, avg=34.34, stdev=24.84 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 32], | 70.00th=[ 39], 80.00th=[ 51], 90.00th=[ 67], 95.00th=[ 82], | 99.00th=[ 122], 99.50th=[ 165], 99.90th=[ 224], 99.95th=[ 224], | 99.99th=[ 224] bw ( KiB/s): min= 94, max= 640, per=25.03%, avg=276.29, stdev=134.79, samples=45 iops : min= 5, max= 40, avg=16.71, stdev= 8.51, samples=45 lat (msec) : 10=8.46%, 20=34.51%, 50=41.41%, 100=14.06%, 250=1.56% cpu : usr=0.09%, sys=8.05%, ctx=1556, 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=180404: Sat Aug 15 19:32:09 2026 read: IOPS=15, BW=252KiB/s (258kB/s)(5744KiB/22770msec) clat (msec): min=3, max=112, avg=24.22, stdev=18.31 lat (msec): min=3, max=112, avg=24.22, stdev=18.31 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 7], 10.00th=[ 9], 20.00th=[ 12], | 30.00th=[ 14], 40.00th=[ 16], 50.00th=[ 18], 60.00th=[ 22], | 70.00th=[ 27], 80.00th=[ 33], 90.00th=[ 54], 95.00th=[ 64], | 99.00th=[ 84], 99.50th=[ 107], 99.90th=[ 112], 99.95th=[ 112], | 99.99th=[ 112] bw ( KiB/s): min= 63, max= 672, per=23.87%, avg=250.62, stdev=143.70, samples=45 iops : min= 3, max= 42, avg=15.09, stdev= 9.13, samples=45 write: IOPS=17, BW=287KiB/s (294kB/s)(6544KiB/22770msec); 0 zone resets clat (msec): min=7, max=220, avg=34.20, stdev=23.17 lat (msec): min=7, max=220, avg=34.21, stdev=23.17 clat percentiles (msec): | 1.00th=[ 11], 5.00th=[ 12], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 34], | 70.00th=[ 42], 80.00th=[ 51], 90.00th=[ 62], 95.00th=[ 73], | 99.00th=[ 115], 99.50th=[ 118], 99.90th=[ 222], 99.95th=[ 222], | 99.99th=[ 222] bw ( KiB/s): min= 94, max= 768, per=25.84%, avg=285.22, stdev=147.86, samples=45 iops : min= 5, max= 48, avg=17.27, stdev= 9.33, samples=45 lat (msec) : 4=0.13%, 10=7.29%, 20=36.59%, 50=39.97%, 100=14.71% lat (msec) : 250=1.30% cpu : usr=0.10%, sys=8.08%, ctx=1571, 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=180405: Sat Aug 15 19:32:09 2026 read: IOPS=17, BW=277KiB/s (284kB/s)(6256KiB/22574msec) clat (msec): min=5, max=158, avg=25.45, stdev=20.20 lat (msec): min=5, max=158, avg=25.45, stdev=20.20 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 8], 10.00th=[ 9], 20.00th=[ 12], | 30.00th=[ 15], 40.00th=[ 17], 50.00th=[ 20], 60.00th=[ 22], | 70.00th=[ 28], 80.00th=[ 35], 90.00th=[ 53], 95.00th=[ 68], | 99.00th=[ 103], 99.50th=[ 142], 99.90th=[ 159], 99.95th=[ 159], | 99.99th=[ 159] bw ( KiB/s): min= 95, max= 768, per=26.23%, avg=275.43, stdev=154.29, samples=44 iops : min= 5, max= 48, avg=16.66, stdev= 9.74, samples=44 write: IOPS=16, BW=267KiB/s (274kB/s)(6032KiB/22574msec); 0 zone resets clat (msec): min=6, max=128, avg=33.27, stdev=20.64 lat (msec): min=6, max=128, avg=33.27, stdev=20.64 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 29], 60.00th=[ 33], | 70.00th=[ 41], 80.00th=[ 48], 90.00th=[ 61], 95.00th=[ 77], | 99.00th=[ 103], 99.50th=[ 125], 99.90th=[ 129], 99.95th=[ 129], | 99.99th=[ 129] bw ( KiB/s): min= 128, max= 640, per=23.62%, avg=260.77, stdev=122.82, samples=44 iops : min= 8, max= 40, avg=15.75, stdev= 7.82, samples=44 lat (msec) : 10=8.85%, 20=33.33%, 50=43.88%, 100=12.89%, 250=1.04% cpu : usr=0.04%, sys=8.27%, ctx=1578, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180406: Sat Aug 15 19:32:09 2026 read: IOPS=16, BW=265KiB/s (271kB/s)(6032KiB/22777msec) clat (msec): min=3, max=142, avg=24.18, stdev=18.42 lat (msec): min=3, max=142, avg=24.18, stdev=18.42 clat percentiles (msec): | 1.00th=[ 6], 5.00th=[ 8], 10.00th=[ 9], 20.00th=[ 11], | 30.00th=[ 14], 40.00th=[ 16], 50.00th=[ 19], 60.00th=[ 22], | 70.00th=[ 27], 80.00th=[ 35], 90.00th=[ 51], 95.00th=[ 64], | 99.00th=[ 90], 99.50th=[ 107], 99.90th=[ 144], 99.95th=[ 144], | 99.99th=[ 144] bw ( KiB/s): min= 95, max= 672, per=24.94%, avg=261.89, stdev=149.44, samples=45 iops : min= 5, max= 42, avg=15.80, stdev= 9.45, samples=45 write: IOPS=17, BW=275KiB/s (281kB/s)(6256KiB/22777msec); 0 zone resets clat (msec): min=6, max=169, avg=34.69, stdev=23.36 lat (msec): min=6, max=169, avg=34.69, stdev=23.36 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 35], | 70.00th=[ 45], 80.00th=[ 53], 90.00th=[ 67], 95.00th=[ 79], | 99.00th=[ 106], 99.50th=[ 157], 99.90th=[ 169], 99.95th=[ 169], | 99.99th=[ 169] bw ( KiB/s): min= 95, max= 832, per=24.74%, avg=273.11, stdev=151.32, samples=45 iops : min= 5, max= 52, avg=16.51, stdev= 9.57, samples=45 lat (msec) : 4=0.13%, 10=9.64%, 20=35.94%, 50=38.02%, 100=15.10% lat (msec) : 250=1.17% cpu : usr=0.07%, sys=7.95%, ctx=1492, 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=1050KiB/s (1075kB/s), 252KiB/s-277KiB/s (258kB/s-284kB/s), io=23.4MiB (24.5MB), run=22574-22808msec WRITE: bw=1105KiB/s (1131kB/s), 267KiB/s-287KiB/s (274kB/s-294kB/s), io=24.6MiB (25.8MB), run=22574-22808msec 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=180424: Sat Aug 15 19:32:17 2026 read: IOPS=2, BW=3033KiB/s (3106kB/s)(7168KiB/2363msec) clat (usec): min=553, max=340942, avg=151093.14, stdev=100017.37 lat (usec): min=555, max=340943, avg=151094.67, stdev=100017.24 clat percentiles (usec): | 1.00th=[ 553], 5.00th=[ 553], 10.00th=[ 553], 20.00th=[126354], | 30.00th=[137364], 40.00th=[137364], 50.00th=[139461], 60.00th=[145753], | 70.00th=[145753], 80.00th=[168821], 90.00th=[341836], 95.00th=[341836], | 99.00th=[341836], 99.50th=[341836], 99.90th=[341836], 99.95th=[341836], | 99.99th=[341836] bw ( KiB/s): min= 4096, max= 5154, per=71.84%, avg=4625.00, stdev=748.12, samples=2 iops : min= 4, max= 5, avg= 4.50, stdev= 0.71, samples=2 write: IOPS=2, BW=2167KiB/s (2219kB/s)(5120KiB/2363msec); 0 zone resets clat (msec): min=151, max=494, avg=236.59, stdev=144.56 lat (msec): min=151, max=494, avg=236.67, stdev=144.54 clat percentiles (msec): | 1.00th=[ 153], 5.00th=[ 153], 10.00th=[ 153], 20.00th=[ 153], | 30.00th=[ 176], 40.00th=[ 176], 50.00th=[ 178], 60.00th=[ 178], | 70.00th=[ 186], 80.00th=[ 186], 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= 2007, max= 3842, per=29.21%, avg=2632.33, stdev=1047.80, samples=3 iops : min= 1, max= 3, avg= 2.00, stdev= 1.00, samples=3 lat (usec) : 750=8.33% lat (msec) : 250=75.00%, 500=16.67% cpu : usr=0.00%, sys=48.22%, ctx=861, 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=180425: Sat Aug 15 19:32:17 2026 read: IOPS=0, BW=644KiB/s (659kB/s)(2048KiB/3181msec) clat (msec): min=8, max=280, avg=144.93, stdev=192.36 lat (msec): min=8, max=280, avg=144.93, stdev=192.36 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 9], 10.00th=[ 9], 20.00th=[ 9], | 30.00th=[ 9], 40.00th=[ 9], 50.00th=[ 9], 60.00th=[ 279], | 70.00th=[ 279], 80.00th=[ 279], 90.00th=[ 279], 95.00th=[ 279], | 99.00th=[ 279], 99.50th=[ 279], 99.90th=[ 279], 99.95th=[ 279], | 99.99th=[ 279] bw ( KiB/s): min= 1756, max= 1903, per=28.42%, avg=1829.50, stdev=103.94, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=3, BW=3219KiB/s (3296kB/s)(10.0MiB/3181msec); 0 zone resets clat (msec): min=93, max=794, avg=275.16, stdev=211.24 lat (msec): min=93, max=794, avg=275.24, stdev=211.24 clat percentiles (msec): | 1.00th=[ 93], 5.00th=[ 93], 10.00th=[ 93], 20.00th=[ 146], | 30.00th=[ 150], 40.00th=[ 157], 50.00th=[ 167], 60.00th=[ 194], | 70.00th=[ 288], 80.00th=[ 309], 90.00th=[ 456], 95.00th=[ 793], | 99.00th=[ 793], 99.50th=[ 793], 99.90th=[ 793], 99.95th=[ 793], | 99.99th=[ 793] bw ( KiB/s): min= 3806, max= 6144, per=50.10%, avg=4515.25, stdev=1092.69, samples=4 iops : min= 3, max= 6, avg= 4.00, stdev= 1.41, samples=4 lat (msec) : 10=8.33%, 100=8.33%, 250=41.67%, 500=33.33%, 1000=8.33% cpu : usr=0.03%, sys=41.32%, ctx=303, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180426: Sat Aug 15 19:32:17 2026 read: IOPS=1, BW=2026KiB/s (2074kB/s)(6144KiB/3033msec) clat (usec): min=492, max=208695, avg=86289.76, stdev=96179.97 lat (usec): min=493, max=208695, avg=86290.71, stdev=96179.65 clat percentiles (usec): | 1.00th=[ 494], 5.00th=[ 494], 10.00th=[ 494], 20.00th=[ 578], | 30.00th=[ 578], 40.00th=[ 832], 50.00th=[ 832], 60.00th=[143655], | 70.00th=[164627], 80.00th=[164627], 90.00th=[208667], 95.00th=[208667], | 99.00th=[208667], 99.50th=[208667], 99.90th=[208667], 99.95th=[208667], | 99.99th=[208667] bw ( KiB/s): min= 2007, max= 3842, per=49.99%, avg=3218.33, stdev=1049.20, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=2026KiB/s (2074kB/s)(6144KiB/3033msec); 0 zone resets clat (msec): min=151, max=978, avg=412.10, stdev=289.86 lat (msec): min=152, max=979, avg=412.29, stdev=289.73 clat percentiles (msec): | 1.00th=[ 153], 5.00th=[ 153], 10.00th=[ 153], 20.00th=[ 296], | 30.00th=[ 296], 40.00th=[ 296], 50.00th=[ 296], 60.00th=[ 347], | 70.00th=[ 401], 80.00th=[ 401], 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= 1903, max= 3512, per=25.92%, avg=2335.75, stdev=785.48, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (usec) : 500=8.33%, 750=8.33%, 1000=8.33% lat (msec) : 250=33.33%, 500=33.33%, 1000=8.33% cpu : usr=0.00%, sys=33.08%, ctx=459, 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=180427: Sat Aug 15 19:32:17 2026 read: IOPS=1, BW=1754KiB/s (1796kB/s)(5120KiB/2919msec) clat (usec): min=345, max=202811, avg=60654.04, stdev=90242.54 lat (usec): min=345, max=202812, avg=60655.08, stdev=90242.79 clat percentiles (usec): | 1.00th=[ 347], 5.00th=[ 347], 10.00th=[ 347], 20.00th=[ 347], | 30.00th=[ 367], 40.00th=[ 367], 50.00th=[ 570], 60.00th=[ 570], | 70.00th=[ 99091], 80.00th=[ 99091], 90.00th=[202376], 95.00th=[202376], | 99.00th=[202376], 99.50th=[202376], 99.90th=[202376], 99.95th=[202376], | 99.99th=[202376] bw ( KiB/s): min= 7613, max= 7613, per=100.00%, avg=7613.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=2, BW=2456KiB/s (2515kB/s)(7168KiB/2919msec); 0 zone resets clat (msec): min=132, max=1121, avg=344.63, stdev=351.44 lat (msec): min=132, max=1121, avg=344.70, stdev=351.45 clat percentiles (msec): | 1.00th=[ 133], 5.00th=[ 133], 10.00th=[ 133], 20.00th=[ 163], | 30.00th=[ 165], 40.00th=[ 165], 50.00th=[ 184], 60.00th=[ 309], | 70.00th=[ 309], 80.00th=[ 342], 90.00th=[ 1116], 95.00th=[ 1116], | 99.00th=[ 1116], 99.50th=[ 1116], 99.90th=[ 1116], 99.95th=[ 1116], | 99.99th=[ 1116] bw ( KiB/s): min= 1732, max= 5763, per=34.76%, avg=3132.67, stdev=2279.54, samples=3 iops : min= 1, max= 5, avg= 2.33, stdev= 2.31, samples=3 lat (usec) : 500=16.67%, 750=8.33% lat (msec) : 100=8.33%, 250=41.67%, 500=16.67%, 2000=8.33% cpu : usr=0.03%, sys=35.44%, ctx=156, 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=6438KiB/s (6593kB/s), 644KiB/s-3033KiB/s (659kB/s-3106kB/s), io=20.0MiB (20.0MB), run=2363-3181msec WRITE: bw=9014KiB/s (9230kB/s), 2026KiB/s-3219KiB/s (2074kB/s-3296kB/s), io=28.0MiB (29.4MB), run=2363-3181msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180419: Sat Aug 15 19:32:17 2026 read: IOPS=3, BW=3529KiB/s (3614kB/s)(7168KiB/2031msec) clat (msec): min=59, max=505, avg=171.36, stdev=164.23 lat (msec): min=59, max=505, avg=171.36, stdev=164.23 clat percentiles (msec): | 1.00th=[ 59], 5.00th=[ 59], 10.00th=[ 59], 20.00th=[ 72], | 30.00th=[ 82], 40.00th=[ 82], 50.00th=[ 86], 60.00th=[ 126], | 70.00th=[ 126], 80.00th=[ 271], 90.00th=[ 506], 95.00th=[ 506], | 99.00th=[ 506], 99.50th=[ 506], 99.90th=[ 506], 99.95th=[ 506], | 99.99th=[ 506] bw ( KiB/s): min= 2048, max= 5446, per=63.69%, avg=3863.33, stdev=1710.91, samples=3 iops : min= 2, max= 5, avg= 3.67, stdev= 1.53, samples=3 write: IOPS=2, BW=2521KiB/s (2581kB/s)(5120KiB/2031msec); 0 zone resets clat (msec): min=79, max=248, avg=153.03, stdev=67.70 lat (msec): min=79, max=249, avg=153.11, stdev=67.71 clat percentiles (msec): | 1.00th=[ 80], 5.00th=[ 80], 10.00th=[ 80], 20.00th=[ 80], | 30.00th=[ 106], 40.00th=[ 106], 50.00th=[ 142], 60.00th=[ 142], | 70.00th=[ 190], 80.00th=[ 190], 90.00th=[ 249], 95.00th=[ 249], | 99.00th=[ 249], 99.50th=[ 249], 99.90th=[ 249], 99.95th=[ 249], | 99.99th=[ 249] bw ( KiB/s): min= 2048, max= 8192, per=60.29%, avg=5120.00, stdev=4344.46, samples=2 iops : min= 2, max= 8, avg= 5.00, stdev= 4.24, samples=2 lat (msec) : 100=41.67%, 250=41.67%, 500=8.33%, 750=8.33% cpu : usr=0.00%, sys=12.56%, ctx=75, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=180420: Sat Aug 15 19:32:17 2026 read: IOPS=0, BW=607KiB/s (621kB/s)(2048KiB/3376msec) clat (msec): min=62, max=282, avg=172.43, stdev=155.53 lat (msec): min=62, max=282, avg=172.44, stdev=155.53 clat percentiles (msec): | 1.00th=[ 63], 5.00th=[ 63], 10.00th=[ 63], 20.00th=[ 63], | 30.00th=[ 63], 40.00th=[ 63], 50.00th=[ 63], 60.00th=[ 284], | 70.00th=[ 284], 80.00th=[ 284], 90.00th=[ 284], 95.00th=[ 284], | 99.00th=[ 284], 99.50th=[ 284], 99.90th=[ 284], 99.95th=[ 284], | 99.99th=[ 284] bw ( KiB/s): min= 1822, max= 1950, per=31.09%, avg=1886.00, stdev=90.51, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=3033KiB/s (3106kB/s)(10.0MiB/3376msec); 0 zone resets clat (msec): min=85, max=1307, avg=293.90, stdev=365.27 lat (msec): min=86, max=1307, avg=294.09, stdev=365.19 clat percentiles (msec): | 1.00th=[ 86], 5.00th=[ 86], 10.00th=[ 86], 20.00th=[ 106], | 30.00th=[ 121], 40.00th=[ 123], 50.00th=[ 144], 60.00th=[ 201], | 70.00th=[ 259], 80.00th=[ 266], 90.00th=[ 330], 95.00th=[ 1301], | 99.00th=[ 1301], 99.50th=[ 1301], 99.90th=[ 1301], 99.95th=[ 1301], | 99.99th=[ 1301] bw ( KiB/s): min= 1950, max= 4096, per=41.89%, avg=3557.25, stdev=1071.51, samples=4 iops : min= 1, max= 4, avg= 3.00, stdev= 1.41, samples=4 lat (msec) : 100=16.67%, 250=41.67%, 500=33.33%, 2000=8.33% cpu : usr=0.00%, sys=19.29%, ctx=236, 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=180421: Sat Aug 15 19:32:17 2026 read: IOPS=2, BW=2341KiB/s (2397kB/s)(6144KiB/2625msec) clat (msec): min=55, max=354, avg=159.65, stdev=112.32 lat (msec): min=55, max=354, avg=159.65, stdev=112.32 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 56], 10.00th=[ 56], 20.00th=[ 79], | 30.00th=[ 79], 40.00th=[ 85], 50.00th=[ 85], 60.00th=[ 190], | 70.00th=[ 194], 80.00th=[ 194], 90.00th=[ 355], 95.00th=[ 355], | 99.00th=[ 355], 99.50th=[ 355], 99.90th=[ 355], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 3744, max= 4096, per=64.62%, avg=3920.00, stdev=248.90, samples=2 iops : min= 3, max= 4, avg= 3.50, stdev= 0.71, samples=2 write: IOPS=2, BW=2341KiB/s (2397kB/s)(6144KiB/2625msec); 0 zone resets clat (msec): min=69, max=733, avg=272.03, stdev=245.49 lat (msec): min=70, max=733, avg=272.13, stdev=245.46 clat percentiles (msec): | 1.00th=[ 70], 5.00th=[ 70], 10.00th=[ 70], 20.00th=[ 71], | 30.00th=[ 71], 40.00th=[ 190], 50.00th=[ 190], 60.00th=[ 275], | 70.00th=[ 292], 80.00th=[ 292], 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= 1872, max= 4096, per=37.43%, avg=3178.33, stdev=1161.83, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 lat (msec) : 100=41.67%, 250=25.00%, 500=25.00%, 750=8.33% cpu : usr=0.00%, sys=10.98%, ctx=117, 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=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=180422: Sat Aug 15 19:32:17 2026 read: IOPS=1, BW=1849KiB/s (1893kB/s)(5120KiB/2769msec) clat (msec): min=84, max=196, avg=127.21, stdev=45.19 lat (msec): min=84, max=196, avg=127.21, stdev=45.19 clat percentiles (msec): | 1.00th=[ 85], 5.00th=[ 85], 10.00th=[ 85], 20.00th=[ 85], | 30.00th=[ 90], 40.00th=[ 90], 50.00th=[ 130], 60.00th=[ 130], | 70.00th=[ 136], 80.00th=[ 136], 90.00th=[ 197], 95.00th=[ 197], | 99.00th=[ 197], 99.50th=[ 197], 99.90th=[ 197], 99.95th=[ 197], | 99.99th=[ 197] bw ( KiB/s): min= 2048, max= 5616, per=63.17%, avg=3832.00, stdev=2522.96, samples=2 iops : min= 2, max= 5, avg= 3.50, stdev= 2.12, samples=2 write: IOPS=2, BW=2589KiB/s (2651kB/s)(7168KiB/2769msec); 0 zone resets clat (msec): min=86, max=502, avg=282.35, stdev=138.16 lat (msec): min=86, max=502, avg=282.45, stdev=138.17 clat percentiles (msec): | 1.00th=[ 87], 5.00th=[ 87], 10.00th=[ 87], 20.00th=[ 165], | 30.00th=[ 213], 40.00th=[ 213], 50.00th=[ 326], 60.00th=[ 342], | 70.00th=[ 342], 80.00th=[ 342], 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= 1818, max= 4096, per=27.75%, avg=2356.80, stdev=976.09, samples=5 iops : min= 1, max= 4, avg= 1.80, stdev= 1.30, samples=5 lat (msec) : 100=25.00%, 250=41.67%, 500=25.00%, 750=8.33% cpu : usr=0.00%, sys=17.77%, ctx=120, 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=6066KiB/s (6212kB/s), 607KiB/s-3529KiB/s (621kB/s-3614kB/s), io=20.0MiB (20.0MB), run=2031-3376msec WRITE: bw=8493KiB/s (8697kB/s), 2341KiB/s-3033KiB/s (2397kB/s-3106kB/s), io=28.0MiB (29.4MB), run=2031-3376msec 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=180432: Sat Aug 15 19:32:25 2026 read: IOPS=1, BW=7042KiB/s (7211kB/s)(12.0MiB/1745msec) clat (msec): min=446, max=714, avg=549.94, stdev=144.44 lat (msec): min=446, max=714, avg=549.94, stdev=144.44 clat percentiles (msec): | 1.00th=[ 447], 5.00th=[ 447], 10.00th=[ 447], 20.00th=[ 447], | 30.00th=[ 447], 40.00th=[ 489], 50.00th=[ 489], 60.00th=[ 489], | 70.00th=[ 718], 80.00th=[ 718], 90.00th=[ 718], 95.00th=[ 718], | 99.00th=[ 718], 99.50th=[ 718], 99.90th=[ 718], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 8175, max= 8192, per=87.16%, avg=8183.50, stdev=12.02, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=66.67%, 750=33.33% cpu : usr=0.00%, sys=16.00%, ctx=58, 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=180434: Sat Aug 15 19:32:25 2026 read: IOPS=1, BW=5354KiB/s (5483kB/s)(4096KiB/765msec) clat (nsec): min=185523k, max=185523k, avg=185523107.00, stdev= 0.00 lat (nsec): min=185526k, max=185526k, avg=185525788.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 186], 5.00th=[ 186], 10.00th=[ 186], 20.00th=[ 186], | 30.00th=[ 186], 40.00th=[ 186], 50.00th=[ 186], 60.00th=[ 186], | 70.00th=[ 186], 80.00th=[ 186], 90.00th=[ 186], 95.00th=[ 186], | 99.00th=[ 186], 99.50th=[ 186], 99.90th=[ 186], 99.95th=[ 186], | 99.99th=[ 186] bw ( KiB/s): min= 7892, max= 7892, per=84.06%, avg=7892.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=2, BW=10.5MiB/s (10.0MB/s)(8192KiB/765msec); 0 zone resets clat (msec): min=156, max=328, avg=242.94, stdev=121.69 lat (msec): min=157, max=329, avg=243.35, stdev=121.57 clat percentiles (msec): | 1.00th=[ 157], 5.00th=[ 157], 10.00th=[ 157], 20.00th=[ 157], | 30.00th=[ 157], 40.00th=[ 157], 50.00th=[ 157], 60.00th=[ 330], | 70.00th=[ 330], 80.00th=[ 330], 90.00th=[ 330], 95.00th=[ 330], | 99.00th=[ 330], 99.50th=[ 330], 99.90th=[ 330], 99.95th=[ 330], | 99.99th=[ 330] lat (msec) : 250=66.67%, 500=33.33% cpu : usr=0.00%, sys=32.98%, ctx=61, 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=180435: Sat Aug 15 19:32:25 2026 write: IOPS=1, BW=5301KiB/s (5428kB/s)(12.0MiB/2318msec); 0 zone resets clat (msec): min=194, max=1824, avg=740.60, stdev=938.77 lat (msec): min=194, max=1825, avg=741.06, stdev=938.89 clat percentiles (msec): | 1.00th=[ 194], 5.00th=[ 194], 10.00th=[ 194], 20.00th=[ 194], | 30.00th=[ 194], 40.00th=[ 203], 50.00th=[ 203], 60.00th=[ 203], | 70.00th=[ 1821], 80.00th=[ 1821], 90.00th=[ 1821], 95.00th=[ 1821], | 99.00th=[ 1821], 99.50th=[ 1821], 99.90th=[ 1821], 99.95th=[ 1821], | 99.99th=[ 1821] bw ( KiB/s): min= 8192, max= 8192, per=57.95%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 250=66.67%, 2000=33.33% cpu : usr=0.00%, sys=10.01%, ctx=45, 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=180436: Sat Aug 15 19:32:25 2026 write: IOPS=1, BW=5621KiB/s (5756kB/s)(12.0MiB/2186msec); 0 zone resets clat (msec): min=172, max=1726, avg=696.50, stdev=892.12 lat (msec): min=172, max=1726, avg=696.84, stdev=892.12 clat percentiles (msec): | 1.00th=[ 174], 5.00th=[ 174], 10.00th=[ 174], 20.00th=[ 174], | 30.00th=[ 174], 40.00th=[ 190], 50.00th=[ 190], 60.00th=[ 190], | 70.00th=[ 1720], 80.00th=[ 1720], 90.00th=[ 1720], 95.00th=[ 1720], | 99.00th=[ 1720], 99.50th=[ 1720], 99.90th=[ 1720], 99.95th=[ 1720], | 99.99th=[ 1720] bw ( KiB/s): min=15784, max=15784, per=100.00%, avg=15784.00, stdev= 0.00, samples=1 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=1 lat (msec) : 250=66.67%, 2000=33.33% cpu : usr=0.05%, sys=13.23%, ctx=97, 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=9389KiB/s (9614kB/s), 5354KiB/s-7042KiB/s (5483kB/s-7211kB/s), io=16.0MiB (16.8MB), run=765-1745msec WRITE: bw=13.8MiB/s (14.5MB/s), 5301KiB/s-10.5MiB/s (5428kB/s-10.0MB/s), io=32.0MiB (33.6MB), run=765-2318msec rand-rw: (groupid=0, jobs=1): err= 0: pid=180437: Sat Aug 15 19:32:25 2026 read: IOPS=1, BW=7704KiB/s (7889kB/s)(12.0MiB/1595msec) clat (msec): min=449, max=581, avg=511.01, stdev=66.25 lat (msec): min=449, max=581, avg=511.02, stdev=66.25 clat percentiles (msec): | 1.00th=[ 451], 5.00th=[ 451], 10.00th=[ 451], 20.00th=[ 451], | 30.00th=[ 451], 40.00th=[ 502], 50.00th=[ 502], 60.00th=[ 502], | 70.00th=[ 584], 80.00th=[ 584], 90.00th=[ 584], 95.00th=[ 584], | 99.00th=[ 584], 99.50th=[ 584], 99.90th=[ 584], 99.95th=[ 584], | 99.99th=[ 584] bw ( KiB/s): min= 5665, max= 8192, per=71.43%, avg=6928.50, stdev=1786.86, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=33.33%, 750=66.67% cpu : usr=0.00%, sys=43.98%, ctx=2409, 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=180438: Sat Aug 15 19:32:25 2026 read: IOPS=0, BW=2425KiB/s (2483kB/s)(4096KiB/1689msec) clat (nsec): min=602539k, max=602539k, avg=602539471.00, stdev= 0.00 lat (nsec): min=602542k, max=602542k, avg=602542117.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 600], 5.00th=[ 600], 10.00th=[ 600], 20.00th=[ 600], | 30.00th=[ 600], 40.00th=[ 600], 50.00th=[ 600], 60.00th=[ 600], | 70.00th=[ 600], 80.00th=[ 600], 90.00th=[ 600], 95.00th=[ 600], | 99.00th=[ 600], 99.50th=[ 600], 99.90th=[ 600], 99.95th=[ 600], | 99.99th=[ 600] bw ( KiB/s): min= 5634, max= 5634, per=58.08%, avg=5634.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=1, BW=4850KiB/s (4967kB/s)(8192KiB/1689msec); 0 zone resets clat (msec): min=351, max=688, avg=520.09, stdev=238.51 lat (msec): min=351, max=689, avg=520.39, stdev=238.50 clat percentiles (msec): | 1.00th=[ 351], 5.00th=[ 351], 10.00th=[ 351], 20.00th=[ 351], | 30.00th=[ 351], 40.00th=[ 351], 50.00th=[ 351], 60.00th=[ 693], | 70.00th=[ 693], 80.00th=[ 693], 90.00th=[ 693], 95.00th=[ 693], | 99.00th=[ 693], 99.50th=[ 693], 99.90th=[ 693], 99.95th=[ 693], | 99.99th=[ 693] bw ( KiB/s): min= 8192, max= 8192, per=57.40%, 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%, 750=66.67% cpu : usr=0.06%, sys=20.26%, ctx=713, 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=180439: Sat Aug 15 19:32:25 2026 write: IOPS=1, BW=5352KiB/s (5480kB/s)(12.0MiB/2296msec); 0 zone resets clat (msec): min=89, max=1864, avg=731.72, stdev=983.82 lat (msec): min=89, max=1864, avg=732.06, stdev=983.76 clat percentiles (msec): | 1.00th=[ 89], 5.00th=[ 89], 10.00th=[ 89], 20.00th=[ 89], | 30.00th=[ 89], 40.00th=[ 243], 50.00th=[ 243], 60.00th=[ 243], | 70.00th=[ 1871], 80.00th=[ 1871], 90.00th=[ 1871], 95.00th=[ 1871], | 99.00th=[ 1871], 99.50th=[ 1871], 99.90th=[ 1871], 99.95th=[ 1871], | 99.99th=[ 1871] bw ( KiB/s): min=16384, max=16384, per=100.00%, avg=16384.00, stdev= 0.00, samples=1 iops : min= 4, max= 4, avg= 4.00, stdev= 0.00, samples=1 lat (msec) : 100=33.33%, 250=33.33%, 2000=33.33% cpu : usr=0.00%, sys=10.07%, ctx=55, 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=180440: Sat Aug 15 19:32:25 2026 write: IOPS=1, BW=7280KiB/s (7454kB/s)(12.0MiB/1688msec); 0 zone resets clat (msec): min=175, max=1158, avg=557.29, stdev=527.17 lat (msec): min=176, max=1159, avg=557.58, stdev=527.20 clat percentiles (msec): | 1.00th=[ 176], 5.00th=[ 176], 10.00th=[ 176], 20.00th=[ 176], | 30.00th=[ 176], 40.00th=[ 338], 50.00th=[ 338], 60.00th=[ 338], | 70.00th=[ 1167], 80.00th=[ 1167], 90.00th=[ 1167], 95.00th=[ 1167], | 99.00th=[ 1167], 99.50th=[ 1167], 99.90th=[ 1167], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min=11221, max=11221, per=78.63%, avg=11221.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 500=33.33%, 2000=33.33% cpu : usr=0.00%, sys=17.13%, ctx=63, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=9700KiB/s (9933kB/s), 2425KiB/s-7704KiB/s (2483kB/s-7889kB/s), io=16.0MiB (16.8MB), run=1595-1689msec WRITE: bw=13.9MiB/s (14.6MB/s), 4850KiB/s-7280KiB/s (4967kB/s-7454kB/s), io=32.0MiB (33.6MB), run=1688-2296msec