== sanity test 398b: DIO and buffer IO race ============== 08:14:21 (1787832861) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 9.78967 s, 5.1 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=145369: Thu Aug 27 08:17:14 2026 read: IOPS=10, BW=42.4KiB/s (43.4kB/s)(5992KiB/141418msec) clat (usec): min=35, max=429265, avg=45919.74, stdev=35367.48 lat (usec): min=35, max=429266, avg=45923.17, stdev=35369.74 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 64], 10.00th=[ 10290], 20.00th=[ 21365], | 30.00th=[ 27132], 40.00th=[ 32900], 50.00th=[ 39060], 60.00th=[ 45876], | 70.00th=[ 55837], 80.00th=[ 68682], 90.00th=[ 88605], 95.00th=[107480], | 99.00th=[158335], 99.50th=[193987], 99.90th=[308282], 99.95th=[429917], | 99.99th=[429917] bw ( KiB/s): min= 7, max= 104, per=25.95%, avg=43.08, stdev=18.91, samples=271 iops : min= 1, max= 26, avg=10.13, stdev= 4.76, samples=271 write: IOPS=11, BW=44.5KiB/s (45.6kB/s)(6296KiB/141418msec); 0 zone resets clat (usec): min=783, max=1604.6k, avg=45742.91, stdev=61827.09 lat (usec): min=785, max=1604.6k, avg=45746.45, stdev=61826.91 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1221], 10.00th=[ 1369], | 20.00th=[ 4015], 30.00th=[ 9634], 40.00th=[ 21103], | 50.00th=[ 32637], 60.00th=[ 44303], 70.00th=[ 57410], | 80.00th=[ 79168], 90.00th=[ 106431], 95.00th=[ 130548], | 99.00th=[ 193987], 99.50th=[ 250610], 99.90th=[ 608175], | 99.95th=[1602225], 99.99th=[1602225] bw ( KiB/s): min= 7, max= 119, per=25.76%, avg=44.82, stdev=19.06, samples=274 iops : min= 1, max= 29, avg=10.55, stdev= 4.80, samples=274 lat (usec) : 50=0.33%, 100=3.58%, 250=0.36%, 500=0.16%, 1000=0.23% lat (msec) : 2=7.26%, 4=2.86%, 10=5.63%, 20=8.37%, 50=36.07% lat (msec) : 100=25.98%, 250=8.76%, 500=0.36%, 750=0.03%, 2000=0.03% cpu : usr=0.07%, sys=4.38%, ctx=6343, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145370: Thu Aug 27 08:17:14 2026 read: IOPS=10, BW=41.8KiB/s (42.8kB/s)(5940KiB/141976msec) clat (usec): min=27, max=1620.0k, avg=48412.61, stdev=53993.99 lat (usec): min=28, max=1620.0k, avg=48415.45, stdev=53994.59 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 63], 10.00th=[ 10159], | 20.00th=[ 22152], 30.00th=[ 27919], 40.00th=[ 34341], | 50.00th=[ 40633], 60.00th=[ 47449], 70.00th=[ 57410], | 80.00th=[ 69731], 90.00th=[ 88605], 95.00th=[ 112722], | 99.00th=[ 164627], 99.50th=[ 206570], 99.90th=[ 312476], | 99.95th=[1619002], 99.99th=[1619002] bw ( KiB/s): min= 7, max= 96, per=25.54%, avg=42.40, stdev=18.88, samples=273 iops : min= 1, max= 24, avg= 9.95, stdev= 4.78, samples=273 write: IOPS=11, BW=44.7KiB/s (45.8kB/s)(6348KiB/141976msec); 0 zone resets clat (usec): min=876, max=543107, avg=43756.17, stdev=48820.88 lat (usec): min=877, max=543110, avg=43758.01, stdev=48820.76 clat percentiles (usec): | 1.00th=[ 1074], 5.00th=[ 1205], 10.00th=[ 1385], 20.00th=[ 3785], | 30.00th=[ 7635], 40.00th=[ 16909], 50.00th=[ 30016], 60.00th=[ 43254], | 70.00th=[ 57934], 80.00th=[ 74974], 90.00th=[108528], 95.00th=[133694], | 99.00th=[198181], 99.50th=[265290], 99.90th=[367002], 99.95th=[541066], | 99.99th=[541066] bw ( KiB/s): min= 7, max= 133, per=25.69%, avg=44.70, stdev=20.94, samples=277 iops : min= 1, max= 33, avg=10.52, stdev= 5.28, samples=277 lat (usec) : 50=0.49%, 100=3.52%, 250=0.36%, 500=0.10%, 750=0.03% lat (usec) : 1000=0.13% lat (msec) : 2=6.97%, 4=3.84%, 10=6.74%, 20=7.91%, 50=33.69% lat (msec) : 100=26.95%, 250=8.85%, 500=0.36%, 750=0.03%, 2000=0.03% cpu : usr=0.07%, sys=4.35%, ctx=6394, majf=0, minf=18 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=145371: Thu Aug 27 08:17:14 2026 read: IOPS=10, BW=41.8KiB/s (42.8kB/s)(6028KiB/144310msec) clat (usec): min=32, max=649451, avg=45589.60, stdev=37395.25 lat (usec): min=32, max=649452, avg=45592.27, stdev=37395.41 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 60], 10.00th=[ 7701], 20.00th=[ 20317], | 30.00th=[ 26084], 40.00th=[ 31851], 50.00th=[ 37487], 60.00th=[ 46400], | 70.00th=[ 56361], 80.00th=[ 68682], 90.00th=[ 87557], 95.00th=[107480], | 99.00th=[149947], 99.50th=[183501], 99.90th=[400557], 99.95th=[650118], | 99.99th=[650118] bw ( KiB/s): min= 7, max= 135, per=25.15%, avg=41.75, stdev=21.61, samples=280 iops : min= 1, max= 33, avg= 9.78, stdev= 5.45, samples=280 write: IOPS=10, BW=43.4KiB/s (44.4kB/s)(6260KiB/144310msec); 0 zone resets clat (usec): min=785, max=1553.5k, avg=47910.30, stdev=62827.23 lat (usec): min=787, max=1553.5k, avg=47913.93, stdev=62826.26 clat percentiles (usec): | 1.00th=[ 1045], 5.00th=[ 1205], 10.00th=[ 1483], | 20.00th=[ 4113], 30.00th=[ 8979], 40.00th=[ 21103], | 50.00th=[ 34866], 60.00th=[ 46924], 70.00th=[ 62129], | 80.00th=[ 81265], 90.00th=[ 109577], 95.00th=[ 141558], | 99.00th=[ 221250], 99.50th=[ 256902], 99.90th=[ 463471], | 99.95th=[1551893], 99.99th=[1551893] bw ( KiB/s): min= 7, max= 144, per=24.87%, avg=43.28, stdev=21.41, samples=280 iops : min= 1, max= 36, avg=10.18, stdev= 5.40, samples=280 lat (usec) : 50=0.49%, 100=3.68%, 250=0.26%, 500=0.10%, 750=0.10% lat (usec) : 1000=0.33% lat (msec) : 2=6.45%, 4=3.29%, 10=6.58%, 20=8.40%, 50=33.27% lat (msec) : 100=27.38%, 250=9.34%, 500=0.29%, 750=0.03%, 2000=0.03% cpu : usr=0.07%, sys=4.25%, ctx=6327, 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=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=145372: Thu Aug 27 08:17:14 2026 read: IOPS=10, BW=42.6KiB/s (43.6kB/s)(6052KiB/142138msec) clat (usec): min=33, max=1621.8k, avg=47108.59, stdev=55066.66 lat (usec): min=33, max=1621.8k, avg=47110.23, stdev=55066.57 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 59], 10.00th=[ 83], | 20.00th=[ 19530], 30.00th=[ 26084], 40.00th=[ 32375], | 50.00th=[ 39060], 60.00th=[ 46400], 70.00th=[ 56886], | 80.00th=[ 69731], 90.00th=[ 90702], 95.00th=[ 110625], | 99.00th=[ 158335], 99.50th=[ 231736], 99.90th=[ 421528], | 99.95th=[1619002], 99.99th=[1619002] bw ( KiB/s): min= 7, max= 95, per=25.46%, avg=42.26, stdev=18.97, samples=276 iops : min= 1, max= 23, avg= 9.91, stdev= 4.77, samples=276 write: IOPS=10, BW=43.9KiB/s (44.9kB/s)(6236KiB/142138msec); 0 zone resets clat (usec): min=715, max=276051, avg=45009.86, stdev=45235.06 lat (usec): min=716, max=276052, avg=45012.76, stdev=45234.18 clat percentiles (usec): | 1.00th=[ 1090], 5.00th=[ 1237], 10.00th=[ 1549], 20.00th=[ 4178], | 30.00th=[ 9110], 40.00th=[ 20579], 50.00th=[ 33162], 60.00th=[ 46924], | 70.00th=[ 60556], 80.00th=[ 79168], 90.00th=[105382], 95.00th=[135267], | 99.00th=[187696], 99.50th=[219153], 99.90th=[265290], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 7, max= 119, per=25.44%, avg=44.26, stdev=19.57, samples=272 iops : min= 1, max= 29, avg=10.43, stdev= 4.92, samples=272 lat (usec) : 50=0.88%, 100=4.39%, 250=0.23%, 750=0.10%, 1000=0.07% lat (msec) : 2=6.12%, 4=3.74%, 10=6.09%, 20=8.53%, 50=32.91% lat (msec) : 100=27.47%, 250=9.18%, 500=0.26%, 2000=0.03% cpu : usr=0.06%, sys=4.28%, ctx=6262, 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=166KiB/s (170kB/s), 41.8KiB/s-42.6KiB/s (42.8kB/s-43.6kB/s), io=23.4MiB (24.6MB), run=141418-144310msec WRITE: bw=174KiB/s (178kB/s), 43.4KiB/s-44.7KiB/s (44.4kB/s-45.8kB/s), io=24.6MiB (25.7MB), run=141418-144310msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145374: Thu Aug 27 08:19:58 2026 read: IOPS=4, BW=19.5KiB/s (19.0kB/s)(5992KiB/307415msec) clat (msec): min=4, max=1743, avg=40.88, stdev=62.05 lat (msec): min=4, max=1743, avg=40.88, stdev=62.05 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 41], 80.00th=[ 54], 90.00th=[ 81], 95.00th=[ 115], | 99.00th=[ 215], 99.50th=[ 284], 99.90th=[ 659], 99.95th=[ 1737], | 99.99th=[ 1737] bw ( KiB/s): min= 7, max= 87, per=29.17%, avg=22.75, stdev=15.80, samples=507 iops : min= 1, max= 21, avg= 5.07, stdev= 3.98, samples=507 write: IOPS=5, BW=20.5KiB/s (20.0kB/s)(6296KiB/307415msec); 0 zone resets clat (msec): min=30, max=670, avg=156.31, stdev=77.35 lat (msec): min=30, max=670, avg=156.32, stdev=77.35 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 72], 10.00th=[ 82], 20.00th=[ 95], | 30.00th=[ 109], 40.00th=[ 122], 50.00th=[ 136], 60.00th=[ 155], | 70.00th=[ 176], 80.00th=[ 211], 90.00th=[ 262], 95.00th=[ 305], | 99.00th=[ 409], 99.50th=[ 472], 99.90th=[ 600], 99.95th=[ 667], | 99.99th=[ 667] bw ( KiB/s): min= 7, max= 63, per=25.10%, avg=20.33, stdev= 9.36, samples=593 iops : min= 1, max= 15, avg= 4.46, stdev= 2.39, samples=593 lat (msec) : 10=2.67%, 20=14.49%, 50=21.09%, 100=19.17%, 250=36.26% lat (msec) : 500=6.09%, 750=0.20%, 2000=0.03% cpu : usr=0.04%, sys=0.97%, ctx=5129, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145375: Thu Aug 27 08:19:58 2026 read: IOPS=4, BW=19.4KiB/s (19.9kB/s)(5940KiB/306072msec) clat (msec): min=4, max=1661, avg=41.14, stdev=59.63 lat (msec): min=4, max=1661, avg=41.15, stdev=59.64 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 27], 60.00th=[ 32], | 70.00th=[ 40], 80.00th=[ 54], 90.00th=[ 89], 95.00th=[ 121], | 99.00th=[ 211], 99.50th=[ 288], 99.90th=[ 472], 99.95th=[ 1670], | 99.99th=[ 1670] bw ( KiB/s): min= 7, max= 87, per=29.35%, avg=22.89, stdev=15.21, samples=499 iops : min= 1, max= 21, avg= 5.11, stdev= 3.86, samples=499 write: IOPS=5, BW=20.7KiB/s (21.2kB/s)(6348KiB/306072msec); 0 zone resets clat (msec): min=36, max=687, avg=154.27, stdev=77.49 lat (msec): min=36, max=687, avg=154.28, stdev=77.49 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 70], 10.00th=[ 81], 20.00th=[ 99], | 30.00th=[ 109], 40.00th=[ 121], 50.00th=[ 136], 60.00th=[ 153], | 70.00th=[ 174], 80.00th=[ 201], 90.00th=[ 251], 95.00th=[ 300], | 99.00th=[ 439], 99.50th=[ 485], 99.90th=[ 676], 99.95th=[ 684], | 99.99th=[ 684] bw ( KiB/s): min= 7, max= 56, per=25.60%, avg=20.74, stdev= 9.54, samples=587 iops : min= 1, max= 14, avg= 4.57, stdev= 2.44, samples=587 lat (msec) : 10=2.83%, 20=14.29%, 50=20.74%, 100=18.13%, 250=38.48% lat (msec) : 500=5.31%, 750=0.20%, 2000=0.03% cpu : usr=0.03%, sys=0.99%, ctx=5130, 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=145376: Thu Aug 27 08:19:58 2026 read: IOPS=4, BW=19.6KiB/s (20.1kB/s)(6028KiB/306852msec) clat (msec): min=6, max=281, avg=41.25, stdev=37.75 lat (msec): min=6, max=281, avg=41.25, stdev=37.75 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 35], | 70.00th=[ 43], 80.00th=[ 58], 90.00th=[ 91], 95.00th=[ 118], | 99.00th=[ 197], 99.50th=[ 213], 99.90th=[ 275], 99.95th=[ 284], | 99.99th=[ 284] bw ( KiB/s): min= 7, max= 87, per=28.46%, avg=22.20, stdev=15.29, samples=522 iops : min= 1, max= 21, avg= 4.93, stdev= 3.88, samples=522 write: IOPS=5, BW=20.4KiB/s (20.9kB/s)(6260KiB/306852msec); 0 zone resets clat (msec): min=29, max=1806, avg=156.22, stdev=87.69 lat (msec): min=29, max=1806, avg=156.23, stdev=87.69 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 70], 10.00th=[ 80], 20.00th=[ 95], | 30.00th=[ 110], 40.00th=[ 123], 50.00th=[ 138], 60.00th=[ 150], | 70.00th=[ 174], 80.00th=[ 203], 90.00th=[ 259], 95.00th=[ 317], | 99.00th=[ 414], 99.50th=[ 447], 99.90th=[ 667], 99.95th=[ 1804], | 99.99th=[ 1804] bw ( KiB/s): min= 7, max= 55, per=24.99%, avg=20.24, stdev= 9.67, samples=592 iops : min= 1, max= 13, avg= 4.44, stdev= 2.46, samples=592 lat (msec) : 10=2.05%, 20=12.70%, 50=22.98%, 100=19.56%, 250=36.91% lat (msec) : 500=5.63%, 750=0.13%, 2000=0.03% cpu : usr=0.04%, sys=0.97%, ctx=5173, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145377: Thu Aug 27 08:19:58 2026 read: IOPS=4, BW=19.8KiB/s (20.3kB/s)(6052KiB/304910msec) clat (msec): min=4, max=661, avg=39.44, stdev=41.14 lat (msec): min=4, max=661, avg=39.44, stdev=41.14 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 33], | 70.00th=[ 42], 80.00th=[ 54], 90.00th=[ 80], 95.00th=[ 113], | 99.00th=[ 197], 99.50th=[ 259], 99.90th=[ 472], 99.95th=[ 659], | 99.99th=[ 659] bw ( KiB/s): min= 7, max= 103, per=29.56%, avg=23.06, stdev=15.88, samples=506 iops : min= 1, max= 25, avg= 5.15, stdev= 4.01, samples=506 write: IOPS=5, BW=20.5KiB/s (20.9kB/s)(6236KiB/304910msec); 0 zone resets clat (msec): min=42, max=1817, avg=157.21, stdev=89.78 lat (msec): min=42, max=1817, avg=157.21, stdev=89.78 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 68], 10.00th=[ 81], 20.00th=[ 94], | 30.00th=[ 109], 40.00th=[ 121], 50.00th=[ 136], 60.00th=[ 155], | 70.00th=[ 174], 80.00th=[ 205], 90.00th=[ 262], 95.00th=[ 317], | 99.00th=[ 443], 99.50th=[ 510], 99.90th=[ 609], 99.95th=[ 1821], | 99.99th=[ 1821] bw ( KiB/s): min= 7, max= 48, per=25.36%, avg=20.54, stdev= 9.16, samples=582 iops : min= 1, max= 12, avg= 4.52, stdev= 2.33, samples=582 lat (msec) : 10=2.57%, 20=13.77%, 50=22.23%, 100=19.34%, 250=35.84% lat (msec) : 500=5.96%, 750=0.26%, 2000=0.03% cpu : usr=0.04%, sys=0.98%, ctx=5216, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=78.1KiB/s (79.0kB/s), 19.4KiB/s-19.8KiB/s (19.9kB/s-20.3kB/s), io=23.4MiB (24.6MB), run=304910-307415msec WRITE: bw=81.8KiB/s (83.7kB/s), 20.4KiB/s-20.7KiB/s (20.9kB/s-21.2kB/s), io=24.6MiB (25.7MB), run=304910-307415msec 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=145441: Thu Aug 27 08:20:41 2026 read: IOPS=12, BW=196KiB/s (200kB/s)(5920KiB/30245msec) clat (usec): min=38, max=197684, avg=42003.59, stdev=34166.72 lat (usec): min=39, max=197686, avg=42004.68, stdev=34166.73 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 57], 10.00th=[ 63], 20.00th=[ 151], | 30.00th=[ 22676], 40.00th=[ 30802], 50.00th=[ 36963], 60.00th=[ 46400], | 70.00th=[ 56886], 80.00th=[ 66847], 90.00th=[ 85459], 95.00th=[101188], | 99.00th=[141558], 99.50th=[177210], 99.90th=[198181], 99.95th=[198181], | 99.99th=[198181] bw ( KiB/s): min= 62, max= 440, per=25.44%, avg=194.36, stdev=74.69, samples=59 iops : min= 3, max= 27, avg=11.36, stdev= 4.74, samples=59 write: IOPS=13, BW=211KiB/s (216kB/s)(6368KiB/30245msec); 0 zone resets clat (usec): min=1402, max=302690, avg=36791.01, stdev=44456.18 lat (usec): min=1404, max=302692, avg=36806.04, stdev=44463.58 clat percentiles (usec): | 1.00th=[ 1483], 5.00th=[ 1647], 10.00th=[ 1926], 20.00th=[ 4293], | 30.00th=[ 7635], 40.00th=[ 14091], 50.00th=[ 25035], 60.00th=[ 32900], | 70.00th=[ 43254], 80.00th=[ 56886], 90.00th=[ 87557], 95.00th=[122160], | 99.00th=[227541], 99.50th=[278922], 99.90th=[304088], 99.95th=[304088], | 99.99th=[304088] bw ( KiB/s): min= 62, max= 411, per=26.20%, avg=210.42, stdev=84.67, samples=59 iops : min= 3, max= 25, avg=12.37, stdev= 5.38, samples=59 lat (usec) : 50=1.04%, 100=7.55%, 250=1.17%, 500=0.13%, 750=0.13% lat (msec) : 2=6.12%, 4=4.04%, 10=8.07%, 20=7.68%, 50=33.98% lat (msec) : 100=23.44%, 250=6.38%, 500=0.26% cpu : usr=0.10%, sys=4.70%, ctx=1441, 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=145442: Thu Aug 27 08:20:41 2026 read: IOPS=11, BW=183KiB/s (188kB/s)(5744KiB/31348msec) clat (usec): min=38, max=179818, avg=38304.99, stdev=33011.32 lat (usec): min=39, max=179819, avg=38306.13, stdev=33011.47 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 54], 10.00th=[ 62], 20.00th=[ 76], | 30.00th=[ 19006], 40.00th=[ 27395], 50.00th=[ 35914], 60.00th=[ 43779], | 70.00th=[ 53216], 80.00th=[ 62653], 90.00th=[ 77071], 95.00th=[102237], | 99.00th=[139461], 99.50th=[164627], 99.90th=[179307], 99.95th=[179307], | 99.99th=[179307] bw ( KiB/s): min= 31, max= 415, per=25.15%, avg=192.17, stdev=91.02, samples=59 iops : min= 1, max= 25, avg=11.22, stdev= 5.73, samples=59 write: IOPS=13, BW=209KiB/s (214kB/s)(6544KiB/31348msec); 0 zone resets clat (usec): min=1068, max=391913, avg=42849.59, stdev=53034.98 lat (usec): min=1069, max=391915, avg=42853.77, stdev=53035.39 clat percentiles (usec): | 1.00th=[ 1418], 5.00th=[ 1647], 10.00th=[ 1860], 20.00th=[ 4555], | 30.00th=[ 8094], 40.00th=[ 15664], 50.00th=[ 25035], 60.00th=[ 40109], | 70.00th=[ 53216], 80.00th=[ 68682], 90.00th=[ 94897], 95.00th=[152044], | 99.00th=[263193], 99.50th=[291505], 99.90th=[392168], 99.95th=[392168], | 99.99th=[392168] bw ( KiB/s): min= 31, max= 443, per=25.88%, avg=207.79, stdev=97.95, samples=62 iops : min= 1, max= 27, avg=12.21, stdev= 6.20, samples=62 lat (usec) : 50=1.69%, 100=8.72%, 250=0.52%, 500=0.39%, 750=0.26% lat (usec) : 1000=0.13% lat (msec) : 2=5.99%, 4=4.04%, 10=8.46%, 20=8.46%, 50=28.39% lat (msec) : 100=25.65%, 250=6.64%, 500=0.65% cpu : usr=0.07%, sys=4.51%, ctx=1327, 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=145443: Thu Aug 27 08:20:41 2026 read: IOPS=12, BW=206KiB/s (211kB/s)(6256KiB/30388msec) clat (usec): min=31, max=209508, avg=40342.73, stdev=33066.15 lat (usec): min=31, max=209510, avg=40343.80, stdev=33066.20 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 55], 10.00th=[ 61], 20.00th=[ 110], | 30.00th=[ 21627], 40.00th=[ 30540], 50.00th=[ 36439], 60.00th=[ 42206], | 70.00th=[ 55313], 80.00th=[ 66847], 90.00th=[ 82314], 95.00th=[101188], | 99.00th=[133694], 99.50th=[162530], 99.90th=[208667], 99.95th=[208667], | 99.99th=[208667] bw ( KiB/s): min= 31, max= 576, per=26.96%, avg=205.97, stdev=105.69, samples=60 iops : min= 1, max= 36, avg=12.08, stdev= 6.72, samples=60 write: IOPS=12, BW=198KiB/s (203kB/s)(6032KiB/30388msec); 0 zone resets clat (usec): min=1322, max=281171, avg=38653.73, stdev=43410.73 lat (usec): min=1324, max=281171, avg=38690.79, stdev=43386.75 clat percentiles (usec): | 1.00th=[ 1483], 5.00th=[ 1713], 10.00th=[ 1926], 20.00th=[ 3982], | 30.00th=[ 8586], 40.00th=[ 16188], 50.00th=[ 27657], 60.00th=[ 37487], | 70.00th=[ 48497], 80.00th=[ 63177], 90.00th=[ 95945], 95.00th=[119014], | 99.00th=[231736], 99.50th=[278922], 99.90th=[283116], 99.95th=[283116], | 99.99th=[283116] bw ( KiB/s): min= 31, max= 506, per=24.64%, avg=197.87, stdev=94.48, samples=60 iops : min= 1, max= 31, avg=11.58, stdev= 5.96, samples=60 lat (usec) : 50=1.43%, 100=8.72%, 250=0.65%, 750=0.13%, 1000=0.13% lat (msec) : 2=5.08%, 4=4.82%, 10=6.38%, 20=8.33%, 50=33.33% lat (msec) : 100=24.09%, 250=6.51%, 500=0.39% cpu : usr=0.07%, sys=4.80%, ctx=1373, 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=145444: Thu Aug 27 08:20:41 2026 read: IOPS=13, BW=208KiB/s (213kB/s)(6032KiB/28953msec) clat (usec): min=34, max=284977, avg=41908.46, stdev=37352.83 lat (usec): min=34, max=284979, avg=41909.59, stdev=37352.77 clat percentiles (usec): | 1.00th=[ 38], 5.00th=[ 56], 10.00th=[ 62], 20.00th=[ 137], | 30.00th=[ 23200], 40.00th=[ 29754], 50.00th=[ 38011], 60.00th=[ 45876], | 70.00th=[ 54264], 80.00th=[ 66323], 90.00th=[ 82314], 95.00th=[102237], | 99.00th=[170918], 99.50th=[283116], 99.90th=[283116], 99.95th=[283116], | 99.99th=[283116] bw ( KiB/s): min= 31, max= 413, per=27.08%, avg=206.86, stdev=82.70, samples=57 iops : min= 1, max= 25, avg=12.14, stdev= 5.23, samples=57 write: IOPS=13, BW=216KiB/s (221kB/s)(6256KiB/28953msec); 0 zone resets clat (usec): min=1394, max=205489, avg=33521.58, stdev=34518.65 lat (usec): min=1396, max=205491, avg=33523.45, stdev=34518.64 clat percentiles (usec): | 1.00th=[ 1434], 5.00th=[ 1647], 10.00th=[ 1827], 20.00th=[ 3916], | 30.00th=[ 7046], 40.00th=[ 11600], 50.00th=[ 22938], 60.00th=[ 34866], | 70.00th=[ 45876], 80.00th=[ 56886], 90.00th=[ 81265], 95.00th=[104334], | 99.00th=[129500], 99.50th=[189793], 99.90th=[204473], 99.95th=[204473], | 99.99th=[204473] bw ( KiB/s): min= 93, max= 413, per=26.91%, avg=216.11, stdev=75.44, samples=57 iops : min= 5, max= 25, avg=12.74, stdev= 4.75, samples=57 lat (usec) : 50=1.04%, 100=8.33%, 250=0.91% lat (msec) : 2=6.25%, 4=4.82%, 10=8.85%, 20=6.25%, 50=33.33% lat (msec) : 100=24.48%, 250=5.47%, 500=0.26% cpu : usr=0.07%, sys=4.93%, ctx=1321, 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=764KiB/s (782kB/s), 183KiB/s-208KiB/s (188kB/s-213kB/s), io=23.4MiB (24.5MB), run=28953-31348msec WRITE: bw=804KiB/s (823kB/s), 198KiB/s-216KiB/s (203kB/s-221kB/s), io=24.6MiB (25.8MB), run=28953-31348msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145436: Thu Aug 27 08:21:20 2026 read: IOPS=5, BW=84.3KiB/s (86.3kB/s)(5920KiB/70234msec) clat (msec): min=6, max=346, avg=40.58, stdev=42.28 lat (msec): min=6, max=346, avg=40.59, stdev=42.28 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 26], 60.00th=[ 30], | 70.00th=[ 40], 80.00th=[ 59], 90.00th=[ 86], 95.00th=[ 136], | 99.00th=[ 194], 99.50th=[ 284], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 30, max= 320, per=27.22%, avg=91.72, stdev=62.57, samples=125 iops : min= 1, max= 20, avg= 4.95, stdev= 4.03, samples=125 write: IOPS=5, BW=90.7KiB/s (92.8kB/s)(6368KiB/70234msec); 0 zone resets clat (msec): min=24, max=472, avg=138.27, stdev=66.10 lat (msec): min=24, max=472, avg=138.27, stdev=66.10 clat percentiles (msec): | 1.00th=[ 42], 5.00th=[ 60], 10.00th=[ 70], 20.00th=[ 85], | 30.00th=[ 101], 40.00th=[ 114], 50.00th=[ 125], 60.00th=[ 138], | 70.00th=[ 155], 80.00th=[ 180], 90.00th=[ 215], 95.00th=[ 268], | 99.00th=[ 368], 99.50th=[ 435], 99.90th=[ 472], 99.95th=[ 472], | 99.99th=[ 472] bw ( KiB/s): min= 29, max= 191, per=25.63%, avg=90.72, stdev=42.88, samples=137 iops : min= 1, max= 11, avg= 4.88, stdev= 2.76, samples=137 lat (msec) : 10=3.39%, 20=14.71%, 50=19.53%, 100=22.14%, 250=36.33% lat (msec) : 500=3.91% cpu : usr=0.04%, sys=1.09%, ctx=1247, 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=145437: Thu Aug 27 08:21:20 2026 read: IOPS=5, BW=80.9KiB/s (82.9kB/s)(5744KiB/70987msec) clat (msec): min=4, max=353, avg=40.70, stdev=48.95 lat (msec): min=4, max=353, avg=40.70, stdev=48.95 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 10], 10.00th=[ 11], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 24], 60.00th=[ 29], | 70.00th=[ 35], 80.00th=[ 53], 90.00th=[ 85], 95.00th=[ 140], | 99.00th=[ 284], 99.50th=[ 326], 99.90th=[ 355], 99.95th=[ 355], | 99.99th=[ 355] bw ( KiB/s): min= 30, max= 382, per=27.92%, avg=94.10, stdev=62.80, samples=119 iops : min= 1, max= 23, avg= 5.13, stdev= 4.03, samples=119 write: IOPS=5, BW=92.2KiB/s (94.4kB/s)(6544KiB/70987msec); 0 zone resets clat (msec): min=30, max=409, avg=137.44, stdev=68.72 lat (msec): min=30, max=409, avg=137.44, stdev=68.72 clat percentiles (msec): | 1.00th=[ 42], 5.00th=[ 55], 10.00th=[ 65], 20.00th=[ 82], | 30.00th=[ 96], 40.00th=[ 108], 50.00th=[ 124], 60.00th=[ 138], | 70.00th=[ 161], 80.00th=[ 188], 90.00th=[ 232], 95.00th=[ 279], | 99.00th=[ 368], 99.50th=[ 372], 99.90th=[ 409], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 28, max= 288, per=26.16%, avg=92.60, stdev=47.98, samples=138 iops : min= 1, max= 18, avg= 5.01, stdev= 3.12, samples=138 lat (msec) : 10=3.39%, 20=14.84%, 50=20.44%, 100=23.44%, 250=33.20% lat (msec) : 500=4.69% cpu : usr=0.04%, sys=1.11%, ctx=1322, 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=145438: Thu Aug 27 08:21:20 2026 read: IOPS=5, BW=91.9KiB/s (94.1kB/s)(6256KiB/68085msec) clat (msec): min=6, max=330, avg=39.29, stdev=42.41 lat (msec): min=6, max=330, avg=39.29, stdev=42.41 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 31], | 70.00th=[ 38], 80.00th=[ 52], 90.00th=[ 84], 95.00th=[ 129], | 99.00th=[ 220], 99.50th=[ 292], 99.90th=[ 330], 99.95th=[ 330], | 99.99th=[ 330] bw ( KiB/s): min= 28, max= 446, per=31.02%, avg=104.53, stdev=76.78, samples=118 iops : min= 1, max= 27, avg= 5.77, stdev= 4.88, samples=118 write: IOPS=5, BW=88.6KiB/s (90.7kB/s)(6032KiB/68085msec); 0 zone resets clat (msec): min=31, max=475, avg=139.70, stdev=65.49 lat (msec): min=31, max=475, avg=139.70, stdev=65.49 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 64], 10.00th=[ 73], 20.00th=[ 90], | 30.00th=[ 100], 40.00th=[ 113], 50.00th=[ 128], 60.00th=[ 140], | 70.00th=[ 159], 80.00th=[ 178], 90.00th=[ 220], 95.00th=[ 284], | 99.00th=[ 351], 99.50th=[ 439], 99.90th=[ 477], 99.95th=[ 477], | 99.99th=[ 477] bw ( KiB/s): min= 29, max= 223, per=24.87%, avg=88.02, stdev=40.54, samples=134 iops : min= 1, max= 13, avg= 4.71, stdev= 2.60, samples=134 lat (msec) : 10=2.60%, 20=17.19%, 50=21.74%, 100=20.83%, 250=33.59% lat (msec) : 500=4.04% cpu : usr=0.04%, sys=1.16%, ctx=1235, 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=145439: Thu Aug 27 08:21:20 2026 read: IOPS=5, BW=86.7KiB/s (88.8kB/s)(6032KiB/69595msec) clat (msec): min=5, max=345, avg=41.76, stdev=45.20 lat (msec): min=5, max=345, avg=41.76, stdev=45.20 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 30], | 70.00th=[ 38], 80.00th=[ 54], 90.00th=[ 99], 95.00th=[ 142], | 99.00th=[ 228], 99.50th=[ 305], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 28, max= 349, per=29.19%, avg=98.38, stdev=69.92, samples=119 iops : min= 1, max= 21, avg= 5.37, stdev= 4.38, samples=119 write: IOPS=5, BW=89.9KiB/s (92.0kB/s)(6256KiB/69595msec); 0 zone resets clat (msec): min=37, max=382, avg=137.23, stdev=61.89 lat (msec): min=37, max=382, avg=137.24, stdev=61.89 clat percentiles (msec): | 1.00th=[ 42], 5.00th=[ 61], 10.00th=[ 69], 20.00th=[ 88], | 30.00th=[ 101], 40.00th=[ 112], 50.00th=[ 123], 60.00th=[ 140], | 70.00th=[ 159], 80.00th=[ 182], 90.00th=[ 224], 95.00th=[ 259], | 99.00th=[ 334], 99.50th=[ 355], 99.90th=[ 384], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 30, max= 223, per=25.42%, avg=89.99, stdev=42.34, samples=136 iops : min= 1, max= 13, avg= 4.84, stdev= 2.74, samples=136 lat (msec) : 10=1.95%, 20=15.63%, 50=21.88%, 100=20.31%, 250=36.59% lat (msec) : 500=3.65% cpu : usr=0.03%, sys=1.15%, ctx=1259, 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=337KiB/s (346kB/s), 80.9KiB/s-91.9KiB/s (82.9kB/s-94.1kB/s), io=23.4MiB (24.5MB), run=68085-70987msec WRITE: bw=355KiB/s (364kB/s), 88.6KiB/s-92.2KiB/s (90.7kB/s-94.4kB/s), io=24.6MiB (25.8MB), run=68085-70987msec 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=145462: Thu Aug 27 08:21:37 2026 read: IOPS=0, BW=1002KiB/s (1026kB/s)(7168KiB/7152msec) clat (msec): min=86, max=3183, avg=660.70, stdev=1128.54 lat (msec): min=86, max=3183, avg=660.70, stdev=1128.54 clat percentiles (msec): | 1.00th=[ 87], 5.00th=[ 87], 10.00th=[ 87], 20.00th=[ 121], | 30.00th=[ 142], 40.00th=[ 142], 50.00th=[ 153], 60.00th=[ 305], | 70.00th=[ 305], 80.00th=[ 634], 90.00th=[ 3171], 95.00th=[ 3171], | 99.00th=[ 3171], 99.50th=[ 3171], 99.90th=[ 3171], 99.95th=[ 3171], | 99.99th=[ 3171] bw ( KiB/s): min= 1539, max= 4023, per=100.00%, avg=2890.25, stdev=1292.14, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=0, BW=716KiB/s (733kB/s)(5120KiB/7152msec); 0 zone resets clat (msec): min=258, max=692, avg=445.62, stdev=169.48 lat (msec): min=258, max=694, avg=446.11, stdev=170.17 clat percentiles (msec): | 1.00th=[ 259], 5.00th=[ 259], 10.00th=[ 259], 20.00th=[ 259], | 30.00th=[ 368], 40.00th=[ 368], 50.00th=[ 376], 60.00th=[ 376], | 70.00th=[ 535], 80.00th=[ 535], 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= 2000, max= 2031, per=52.34%, avg=2018.25, stdev=15.39, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 100=8.33%, 250=25.00%, 500=33.33%, 750=25.00%, >=2000=8.33% cpu : usr=0.03%, sys=1.99%, ctx=83, 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=145464: Thu Aug 27 08:21:37 2026 read: IOPS=0, BW=280KiB/s (287kB/s)(2048KiB/7307msec) clat (msec): min=82, max=315, avg=199.26, stdev=164.80 lat (msec): min=82, max=315, avg=199.26, stdev=164.80 clat percentiles (msec): | 1.00th=[ 83], 5.00th=[ 83], 10.00th=[ 83], 20.00th=[ 83], | 30.00th=[ 83], 40.00th=[ 83], 50.00th=[ 83], 60.00th=[ 317], | 70.00th=[ 317], 80.00th=[ 317], 90.00th=[ 317], 95.00th=[ 317], | 99.00th=[ 317], 99.50th=[ 317], 99.90th=[ 317], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 1630, max= 2000, per=65.90%, avg=1815.00, stdev=261.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1401KiB/s (1435kB/s)(10.0MiB/7307msec); 0 zone resets clat (msec): min=205, max=2757, avg=682.12, stdev=763.56 lat (msec): min=205, max=2757, avg=682.22, stdev=763.59 clat percentiles (msec): | 1.00th=[ 205], 5.00th=[ 205], 10.00th=[ 205], 20.00th=[ 247], | 30.00th=[ 268], 40.00th=[ 279], 50.00th=[ 321], 60.00th=[ 550], | 70.00th=[ 592], 80.00th=[ 768], 90.00th=[ 835], 95.00th=[ 2769], | 99.00th=[ 2769], 99.50th=[ 2769], 99.90th=[ 2769], 99.95th=[ 2769], | 99.99th=[ 2769] bw ( KiB/s): min= 1831, max= 6095, per=66.31%, avg=2556.86, stdev=1561.58, samples=7 iops : min= 1, max= 5, avg= 1.57, stdev= 1.51, samples=7 lat (msec) : 100=8.33%, 250=16.67%, 500=33.33%, 750=16.67%, 1000=16.67% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=1.92%, ctx=80, 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=145466: Thu Aug 27 08:21:37 2026 read: IOPS=0, BW=877KiB/s (898kB/s)(6144KiB/7007msec) clat (msec): min=90, max=605, avg=199.78, stdev=200.30 lat (msec): min=90, max=605, avg=199.79, stdev=200.30 clat percentiles (msec): | 1.00th=[ 90], 5.00th=[ 90], 10.00th=[ 90], 20.00th=[ 100], | 30.00th=[ 100], 40.00th=[ 113], 50.00th=[ 113], 60.00th=[ 136], | 70.00th=[ 157], 80.00th=[ 157], 90.00th=[ 609], 95.00th=[ 609], | 99.00th=[ 609], 99.50th=[ 609], 99.90th=[ 609], 99.95th=[ 609], | 99.99th=[ 609] bw ( KiB/s): min= 1831, max= 4063, per=89.95%, avg=2477.25, stdev=1060.61, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=877KiB/s (898kB/s)(6144KiB/7007msec); 0 zone resets clat (msec): min=204, max=3349, avg=858.51, stdev=1230.48 lat (msec): min=204, max=3349, avg=858.61, stdev=1230.48 clat percentiles (msec): | 1.00th=[ 205], 5.00th=[ 205], 10.00th=[ 205], 20.00th=[ 215], | 30.00th=[ 215], 40.00th=[ 288], 50.00th=[ 288], 60.00th=[ 498], | 70.00th=[ 600], 80.00th=[ 600], 90.00th=[ 3339], 95.00th=[ 3339], | 99.00th=[ 3339], 99.50th=[ 3339], 99.90th=[ 3339], 99.95th=[ 3339], | 99.99th=[ 3339] bw ( KiB/s): min= 1831, max= 4063, per=64.55%, avg=2489.00, stdev=1053.56, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 100=16.67%, 250=41.67%, 500=16.67%, 750=16.67%, >=2000=8.33% cpu : usr=0.03%, sys=3.15%, ctx=69, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145468: Thu Aug 27 08:21:37 2026 read: IOPS=0, BW=689KiB/s (705kB/s)(5120KiB/7435msec) clat (msec): min=76, max=775, avg=293.38, stdev=284.65 lat (msec): min=76, max=775, avg=293.38, stdev=284.65 clat percentiles (msec): | 1.00th=[ 78], 5.00th=[ 78], 10.00th=[ 78], 20.00th=[ 78], | 30.00th=[ 88], 40.00th=[ 88], 50.00th=[ 241], 60.00th=[ 241], | 70.00th=[ 288], 80.00th=[ 288], 90.00th=[ 776], 95.00th=[ 776], | 99.00th=[ 776], 99.50th=[ 776], 99.90th=[ 776], 99.95th=[ 776], | 99.99th=[ 776] bw ( KiB/s): min= 2000, max= 4063, per=97.97%, avg=2698.00, stdev=1182.23, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=0, BW=964KiB/s (987kB/s)(7168KiB/7435msec); 0 zone resets clat (msec): min=109, max=3040, avg=749.56, stdev=1035.81 lat (msec): min=109, max=3040, avg=749.68, stdev=1035.79 clat percentiles (msec): | 1.00th=[ 110], 5.00th=[ 110], 10.00th=[ 110], 20.00th=[ 239], | 30.00th=[ 288], 40.00th=[ 288], 50.00th=[ 309], 60.00th=[ 426], | 70.00th=[ 426], 80.00th=[ 835], 90.00th=[ 3037], 95.00th=[ 3037], | 99.00th=[ 3037], 99.50th=[ 3037], 99.90th=[ 3037], 99.95th=[ 3037], | 99.99th=[ 3037] bw ( KiB/s): min= 1984, max= 4096, per=62.87%, avg=2424.40, stdev=934.61, samples=5 iops : min= 1, max= 4, avg= 1.60, stdev= 1.34, samples=5 lat (msec) : 100=16.67%, 250=25.00%, 500=33.33%, 1000=16.67%, >=2000=8.33% cpu : usr=0.03%, sys=1.57%, ctx=63, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2755KiB/s (2821kB/s), 280KiB/s-1002KiB/s (287kB/s-1026kB/s), io=20.0MiB (20.0MB), run=7007-7435msec WRITE: bw=3856KiB/s (3949kB/s), 716KiB/s-1401KiB/s (733kB/s-1435kB/s), io=28.0MiB (29.4MB), run=7007-7435msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145461: Thu Aug 27 08:21:37 2026 read: IOPS=1, BW=1325KiB/s (1357kB/s)(7168KiB/5408msec) clat (usec): min=588, max=2368.2k, avg=512897.11, stdev=824888.96 lat (usec): min=589, max=2368.2k, avg=512898.55, stdev=824888.79 clat percentiles (usec): | 1.00th=[ 586], 5.00th=[ 586], 10.00th=[ 586], | 20.00th=[ 187696], 30.00th=[ 196084], 40.00th=[ 196084], | 50.00th=[ 221250], 60.00th=[ 270533], 70.00th=[ 270533], | 80.00th=[ 346031], 90.00th=[2365588], 95.00th=[2365588], | 99.00th=[2365588], 99.50th=[2365588], 99.90th=[2365588], | 99.95th=[2365588], 99.99th=[2365588] bw ( KiB/s): min= 2023, max= 4087, per=89.87%, avg=2448.00, stdev=916.28, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 write: IOPS=0, BW=947KiB/s (969kB/s)(5120KiB/5408msec); 0 zone resets clat (msec): min=223, max=596, avg=348.70, stdev=144.37 lat (msec): min=223, max=596, avg=348.79, stdev=144.38 clat percentiles (msec): | 1.00th=[ 224], 5.00th=[ 224], 10.00th=[ 224], 20.00th=[ 224], | 30.00th=[ 288], 40.00th=[ 288], 50.00th=[ 305], 60.00th=[ 305], | 70.00th=[ 334], 80.00th=[ 334], 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= 1822, max= 2048, per=51.99%, avg=1983.00, stdev=107.83, samples=4 iops : min= 1, max= 2, avg= 1.25, stdev= 0.50, samples=4 lat (usec) : 750=8.33% lat (msec) : 250=33.33%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.04%, sys=7.27%, ctx=564, 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=145463: Thu Aug 27 08:21:37 2026 read: IOPS=0, BW=272KiB/s (279kB/s)(2048KiB/7516msec) clat (usec): min=995, max=262448, avg=131722.27, stdev=184875.01 lat (usec): min=997, max=262449, avg=131723.54, stdev=184874.69 clat percentiles (usec): | 1.00th=[ 996], 5.00th=[ 996], 10.00th=[ 996], 20.00th=[ 996], | 30.00th=[ 996], 40.00th=[ 996], 50.00th=[ 996], 60.00th=[263193], | 70.00th=[263193], 80.00th=[263193], 90.00th=[263193], 95.00th=[263193], | 99.00th=[263193], 99.50th=[263193], 99.90th=[263193], 99.95th=[263193], | 99.99th=[263193] bw ( KiB/s): min= 1420, max= 1939, per=61.66%, avg=1679.50, stdev=366.99, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1362KiB/s (1395kB/s)(10.0MiB/7516msec); 0 zone resets clat (msec): min=205, max=2637, avg=693.08, stdev=720.54 lat (msec): min=205, max=2637, avg=693.43, stdev=720.64 clat percentiles (msec): | 1.00th=[ 205], 5.00th=[ 205], 10.00th=[ 205], 20.00th=[ 239], | 30.00th=[ 317], 40.00th=[ 334], 50.00th=[ 430], 60.00th=[ 531], | 70.00th=[ 558], 80.00th=[ 751], 90.00th=[ 936], 95.00th=[ 2635], | 99.00th=[ 2635], 99.50th=[ 2635], 99.90th=[ 2635], 99.95th=[ 2635], | 99.99th=[ 2635] bw ( KiB/s): min= 1910, max= 4047, per=67.40%, avg=2570.71, stdev=953.21, samples=7 iops : min= 1, max= 3, avg= 1.57, stdev= 0.98, samples=7 lat (usec) : 1000=8.33% lat (msec) : 250=16.67%, 500=33.33%, 750=25.00%, 1000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=5.84%, ctx=161, 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=145465: Thu Aug 27 08:21:37 2026 read: IOPS=0, BW=979KiB/s (1002kB/s)(6144KiB/6277msec) clat (usec): min=485, max=347208, avg=224034.53, stdev=142037.19 lat (usec): min=487, max=347209, avg=224036.01, stdev=142036.99 clat percentiles (usec): | 1.00th=[ 486], 5.00th=[ 486], 10.00th=[ 486], 20.00th=[ 96994], | 30.00th=[ 96994], 40.00th=[265290], 50.00th=[265290], 60.00th=[299893], | 70.00th=[333448], 80.00th=[333448], 90.00th=[346031], 95.00th=[346031], | 99.00th=[346031], 99.50th=[346031], 99.90th=[346031], 99.95th=[346031], | 99.99th=[346031] bw ( KiB/s): min= 1910, max= 3650, per=88.42%, avg=2408.50, stdev=829.83, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=979KiB/s (1002kB/s)(6144KiB/6277msec); 0 zone resets clat (msec): min=138, max=2772, avg=784.17, stdev=1008.82 lat (msec): min=138, max=2773, avg=784.35, stdev=1009.13 clat percentiles (msec): | 1.00th=[ 138], 5.00th=[ 138], 10.00th=[ 138], 20.00th=[ 226], | 30.00th=[ 226], 40.00th=[ 239], 50.00th=[ 239], 60.00th=[ 468], | 70.00th=[ 869], 80.00th=[ 869], 90.00th=[ 2769], 95.00th=[ 2769], | 99.00th=[ 2769], 99.50th=[ 2769], 99.90th=[ 2769], 99.95th=[ 2769], | 99.99th=[ 2769] bw ( KiB/s): min= 1910, max= 2666, per=56.70%, avg=2162.50, stdev=340.97, samples=4 iops : min= 1, max= 2, avg= 1.25, stdev= 0.50, samples=4 lat (usec) : 500=8.33% lat (msec) : 100=8.33%, 250=25.00%, 500=41.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.02%, sys=5.90%, ctx=129, 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=145467: Thu Aug 27 08:21:37 2026 read: IOPS=0, BW=848KiB/s (868kB/s)(5120KiB/6041msec) clat (usec): min=328, max=543057, avg=243205.01, stdev=243282.62 lat (usec): min=328, max=543058, avg=243206.07, stdev=243282.92 clat percentiles (usec): | 1.00th=[ 330], 5.00th=[ 330], 10.00th=[ 330], 20.00th=[ 330], | 30.00th=[ 586], 40.00th=[ 586], 50.00th=[258999], 60.00th=[258999], | 70.00th=[413139], 80.00th=[413139], 90.00th=[541066], 95.00th=[541066], | 99.00th=[541066], 99.50th=[541066], 99.90th=[541066], 99.95th=[541066], | 99.99th=[541066] bw ( KiB/s): min= 2035, max= 5475, per=100.00%, avg=3755.00, stdev=2432.45, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1187KiB/s (1215kB/s)(7168KiB/6041msec); 0 zone resets clat (msec): min=170, max=2589, avg=643.85, stdev=864.78 lat (msec): min=170, max=2589, avg=643.95, stdev=864.79 clat percentiles (msec): | 1.00th=[ 171], 5.00th=[ 171], 10.00th=[ 171], 20.00th=[ 230], | 30.00th=[ 288], 40.00th=[ 288], 50.00th=[ 351], 60.00th=[ 368], | 70.00th=[ 368], 80.00th=[ 514], 90.00th=[ 2601], 95.00th=[ 2601], | 99.00th=[ 2601], 99.50th=[ 2601], 99.90th=[ 2601], 99.95th=[ 2601], | 99.99th=[ 2601] bw ( KiB/s): min= 1380, max= 4079, per=57.58%, avg=2196.00, stdev=950.84, samples=6 iops : min= 1, max= 3, avg= 1.33, stdev= 0.82, samples=6 lat (usec) : 500=8.33%, 750=8.33% lat (msec) : 250=16.67%, 500=41.67%, 750=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=6.51%, ctx=118, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=2725KiB/s (2790kB/s), 272KiB/s-1325KiB/s (279kB/s-1357kB/s), io=20.0MiB (20.0MB), run=5408-7516msec WRITE: bw=3815KiB/s (3906kB/s), 947KiB/s-1362KiB/s (969kB/s-1395kB/s), io=28.0MiB (29.4MB), run=5408-7516msec 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=145476: Thu Aug 27 08:21:56 2026 read: IOPS=0, BW=3036KiB/s (3109kB/s)(12.0MiB/4047msec) clat (msec): min=519, max=1935, avg=1329.90, stdev=730.05 lat (msec): min=519, max=1935, avg=1329.91, stdev=730.05 clat percentiles (msec): | 1.00th=[ 518], 5.00th=[ 518], 10.00th=[ 518], 20.00th=[ 518], | 30.00th=[ 518], 40.00th=[ 1536], 50.00th=[ 1536], 60.00th=[ 1536], | 70.00th=[ 1938], 80.00th=[ 1938], 90.00th=[ 1938], 95.00th=[ 1938], | 99.00th=[ 1938], 99.50th=[ 1938], 99.90th=[ 1938], 99.95th=[ 1938], | 99.99th=[ 1938] bw ( KiB/s): min= 7831, max= 7907, per=100.00%, avg=7869.00, stdev=53.74, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=1.78%, ctx=35, 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=145477: Thu Aug 27 08:21:56 2026 read: IOPS=0, BW=1363KiB/s (1395kB/s)(4096KiB/3006msec) clat (nsec): min=236428k, max=236428k, avg=236428403.00, stdev= 0.00 lat (nsec): min=236431k, max=236431k, avg=236430692.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 236], 5.00th=[ 236], 10.00th=[ 236], 20.00th=[ 236], | 30.00th=[ 236], 40.00th=[ 236], 50.00th=[ 236], 60.00th=[ 236], | 70.00th=[ 236], 80.00th=[ 236], 90.00th=[ 236], 95.00th=[ 236], | 99.00th=[ 236], 99.50th=[ 236], 99.90th=[ 236], 99.95th=[ 236], | 99.99th=[ 236] bw ( KiB/s): min= 6491, max= 6491, per=100.00%, avg=6491.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2725KiB/s (2791kB/s)(8192KiB/3006msec); 0 zone resets clat (msec): min=1157, max=1561, avg=1359.50, stdev=286.36 lat (msec): min=1157, max=1563, avg=1360.36, stdev=287.28 clat percentiles (msec): | 1.00th=[ 1150], 5.00th=[ 1150], 10.00th=[ 1150], 20.00th=[ 1150], | 30.00th=[ 1150], 40.00th=[ 1150], 50.00th=[ 1150], 60.00th=[ 1569], | 70.00th=[ 1569], 80.00th=[ 1569], 90.00th=[ 1569], 95.00th=[ 1569], | 99.00th=[ 1569], 99.50th=[ 1569], 99.90th=[ 1569], 99.95th=[ 1569], | 99.99th=[ 1569] bw ( KiB/s): min= 7831, max= 7831, per=75.60%, avg=7831.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 250=33.33%, 2000=66.67% cpu : usr=0.00%, sys=4.76%, ctx=59, 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=145478: Thu Aug 27 08:21:56 2026 write: IOPS=1, BW=6107KiB/s (6254kB/s)(12.0MiB/2012msec); 0 zone resets clat (msec): min=515, max=719, avg=598.24, stdev=107.14 lat (msec): min=515, max=719, avg=598.72, stdev=107.18 clat percentiles (msec): | 1.00th=[ 514], 5.00th=[ 514], 10.00th=[ 514], 20.00th=[ 514], | 30.00th=[ 514], 40.00th=[ 558], 50.00th=[ 558], 60.00th=[ 558], | 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= 7876, max= 8015, per=76.70%, avg=7945.50, stdev=98.29, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=100.00% cpu : usr=0.10%, sys=5.57%, ctx=54, 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=145479: Thu Aug 27 08:21:56 2026 write: IOPS=0, BW=3885KiB/s (3978kB/s)(12.0MiB/3163msec); 0 zone resets clat (msec): min=498, max=1940, avg=980.59, stdev=831.66 lat (msec): min=501, max=1941, avg=982.31, stdev=830.87 clat percentiles (msec): | 1.00th=[ 498], 5.00th=[ 498], 10.00th=[ 498], 20.00th=[ 498], | 30.00th=[ 498], 40.00th=[ 502], 50.00th=[ 502], 60.00th=[ 502], | 70.00th=[ 1938], 80.00th=[ 1938], 90.00th=[ 1938], 95.00th=[ 1938], | 99.00th=[ 1938], 99.50th=[ 1938], 99.90th=[ 1938], 99.95th=[ 1938], | 99.99th=[ 1938] bw ( KiB/s): min= 7876, max= 8015, per=76.70%, avg=7945.50, stdev=98.29, 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=3.86%, ctx=46, 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=4048KiB/s (4146kB/s), 1363KiB/s-3036KiB/s (1395kB/s-3109kB/s), io=16.0MiB (16.8MB), run=3006-4047msec WRITE: bw=10.1MiB/s (10.6MB/s), 2725KiB/s-6107KiB/s (2791kB/s-6254kB/s), io=32.0MiB (33.6MB), run=2012-3163msec rand-rw: (groupid=0, jobs=1): err= 0: pid=145480: Thu Aug 27 08:21:57 2026 read: IOPS=0, BW=3343KiB/s (3423kB/s)(12.0MiB/3676msec) clat (msec): min=1063, max=1203, avg=1111.57, stdev=79.54 lat (msec): min=1063, max=1203, avg=1111.57, stdev=79.54 clat percentiles (msec): | 1.00th=[ 1062], 5.00th=[ 1062], 10.00th=[ 1062], 20.00th=[ 1062], | 30.00th=[ 1062], 40.00th=[ 1070], 50.00th=[ 1070], 60.00th=[ 1070], | 70.00th=[ 1200], 80.00th=[ 1200], 90.00th=[ 1200], 95.00th=[ 1200], | 99.00th=[ 1200], 99.50th=[ 1200], 99.90th=[ 1200], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 7937, max= 8143, per=100.00%, avg=8040.00, stdev=145.66, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 2000=100.00% cpu : usr=0.00%, sys=9.12%, ctx=314, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=145481: Thu Aug 27 08:21:57 2026 read: IOPS=0, BW=984KiB/s (1007kB/s)(4096KiB/4164msec) clat (nsec): min=1094.1M, max=1094.1M, avg=1094052276.00, stdev= 0.00 lat (nsec): min=1094.1M, max=1094.1M, avg=1094054397.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1099], 5.00th=[ 1099], 10.00th=[ 1099], 20.00th=[ 1099], | 30.00th=[ 1099], 40.00th=[ 1099], 50.00th=[ 1099], 60.00th=[ 1099], | 70.00th=[ 1099], 80.00th=[ 1099], 90.00th=[ 1099], 95.00th=[ 1099], | 99.00th=[ 1099], 99.50th=[ 1099], 99.90th=[ 1099], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 7937, max= 7937, per=100.00%, avg=7937.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1967KiB/s (2015kB/s)(8192KiB/4164msec); 0 zone resets clat (msec): min=880, max=1937, avg=1408.76, stdev=747.19 lat (msec): min=881, max=1939, avg=1410.13, stdev=748.08 clat percentiles (msec): | 1.00th=[ 877], 5.00th=[ 877], 10.00th=[ 877], 20.00th=[ 877], | 30.00th=[ 877], 40.00th=[ 877], 50.00th=[ 877], 60.00th=[ 1938], | 70.00th=[ 1938], 80.00th=[ 1938], 90.00th=[ 1938], 95.00th=[ 1938], | 99.00th=[ 1938], 99.50th=[ 1938], 99.90th=[ 1938], 99.95th=[ 1938], | 99.99th=[ 1938] bw ( KiB/s): min= 8143, max= 8143, per=100.00%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 1000=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.10%, ctx=100, 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=145482: Thu Aug 27 08:21:57 2026 write: IOPS=0, BW=2503KiB/s (2563kB/s)(12.0MiB/4909msec); 0 zone resets clat (msec): min=373, max=2149, avg=1543.50, stdev=1013.77 lat (msec): min=373, max=2149, avg=1544.09, stdev=1013.98 clat percentiles (msec): | 1.00th=[ 372], 5.00th=[ 372], 10.00th=[ 372], 20.00th=[ 372], | 30.00th=[ 372], 40.00th=[ 2106], 50.00th=[ 2106], 60.00th=[ 2106], | 70.00th=[ 2165], 80.00th=[ 2165], 90.00th=[ 2165], 95.00th=[ 2165], | 99.00th=[ 2165], 99.50th=[ 2165], 99.90th=[ 2165], 99.95th=[ 2165], | 99.99th=[ 2165] bw ( KiB/s): min= 8143, max= 8175, per=100.00%, avg=8159.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, >=2000=66.67% cpu : usr=0.00%, sys=2.12%, ctx=69, 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=145483: Thu Aug 27 08:21:57 2026 write: IOPS=0, BW=3632KiB/s (3719kB/s)(12.0MiB/3383msec); 0 zone resets clat (msec): min=642, max=1817, avg=1078.38, stdev=643.85 lat (msec): min=642, max=1819, avg=1079.65, stdev=643.98 clat percentiles (msec): | 1.00th=[ 642], 5.00th=[ 642], 10.00th=[ 642], 20.00th=[ 642], | 30.00th=[ 642], 40.00th=[ 776], 50.00th=[ 776], 60.00th=[ 776], | 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= 7937, max= 8192, per=100.00%, avg=8064.50, stdev=180.31, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=2.81%, ctx=29, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3935KiB/s (4029kB/s), 984KiB/s-3343KiB/s (1007kB/s-3423kB/s), io=16.0MiB (16.8MB), run=3676-4164msec WRITE: bw=6675KiB/s (6835kB/s), 1967KiB/s-3632KiB/s (2015kB/s-3719kB/s), io=32.0MiB (33.6MB), run=3383-4909msec