== sanity test 398b: DIO and buffer IO race ============== 21:43:34 (1785462214) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 8.18224 s, 6.2 MB/s mix direct rw 4096 by fio with 4 jobs... mix buffer rw 4096 by fio with 4 jobs... rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync, iodepth=16 ... fio-3.19 Starting 4 processes rand-rw: (groupid=0, jobs=1): err= 0: pid=178574: Thu Jul 30 21:47:26 2026 read: IOPS=7, BW=29.0KiB/s (29.7kB/s)(5992KiB/206532msec) clat (usec): min=43, max=1330.5k, avg=77079.38, stdev=60820.56 lat (usec): min=44, max=1330.5k, avg=77080.51, stdev=60820.60 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 15664], 10.00th=[ 27395], | 20.00th=[ 38011], 30.00th=[ 46400], 40.00th=[ 54789], | 50.00th=[ 66323], 60.00th=[ 77071], 70.00th=[ 91751], | 80.00th=[ 110625], 90.00th=[ 137364], 95.00th=[ 168821], | 99.00th=[ 263193], 99.50th=[ 287310], 99.90th=[ 666895], | 99.95th=[1333789], 99.99th=[1333789] bw ( KiB/s): min= 7, max= 79, per=25.34%, avg=29.14, stdev=14.29, samples=393 iops : min= 1, max= 19, avg= 6.60, stdev= 3.62, samples=393 write: IOPS=7, BW=30.5KiB/s (31.2kB/s)(6296KiB/206532msec); 0 zone resets clat (usec): min=985, max=423135, avg=57747.75, stdev=60080.58 lat (usec): min=986, max=423136, avg=57749.16, stdev=60080.59 clat percentiles (usec): | 1.00th=[ 1123], 5.00th=[ 1270], 10.00th=[ 1565], 20.00th=[ 5932], | 30.00th=[ 12649], 40.00th=[ 26870], 50.00th=[ 42206], 60.00th=[ 57934], | 70.00th=[ 72877], 80.00th=[ 99091], 90.00th=[137364], 95.00th=[175113], | 99.00th=[263193], 99.50th=[308282], 99.90th=[396362], 99.95th=[421528], | 99.99th=[421528] bw ( KiB/s): min= 7, max= 144, per=25.00%, avg=30.25, stdev=17.07, samples=398 iops : min= 1, max= 36, avg= 6.88, stdev= 4.32, samples=398 lat (usec) : 50=0.33%, 100=1.07%, 250=0.13%, 750=0.07%, 1000=0.03% lat (msec) : 2=5.92%, 4=2.08%, 10=6.09%, 20=5.70%, 50=23.86% lat (msec) : 100=32.71%, 250=20.74%, 500=1.20%, 750=0.03%, 2000=0.03% cpu : usr=0.03%, sys=3.01%, ctx=6153, 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=178575: Thu Jul 30 21:47:26 2026 read: IOPS=7, BW=28.9KiB/s (29.6kB/s)(5940KiB/205830msec) clat (usec): min=35, max=1226.2k, avg=77407.69, stdev=59720.30 lat (usec): min=35, max=1226.2k, avg=77412.52, stdev=59720.62 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 19006], 10.00th=[ 28181], | 20.00th=[ 36963], 30.00th=[ 45876], 40.00th=[ 55313], | 50.00th=[ 65799], 60.00th=[ 77071], 70.00th=[ 89654], | 80.00th=[ 110625], 90.00th=[ 141558], 95.00th=[ 170918], | 99.00th=[ 263193], 99.50th=[ 308282], 99.90th=[ 492831], | 99.95th=[1233126], 99.99th=[1233126] bw ( KiB/s): min= 7, max= 72, per=25.18%, avg=28.95, stdev=13.60, samples=394 iops : min= 1, max= 18, avg= 6.56, stdev= 3.45, samples=394 write: IOPS=7, BW=30.8KiB/s (31.6kB/s)(6348KiB/205830msec); 0 zone resets clat (usec): min=842, max=520004, avg=57139.50, stdev=61248.90 lat (usec): min=843, max=520005, avg=57141.75, stdev=61248.22 clat percentiles (usec): | 1.00th=[ 1139], 5.00th=[ 1254], 10.00th=[ 1418], 20.00th=[ 5997], | 30.00th=[ 11600], 40.00th=[ 24511], 50.00th=[ 41157], 60.00th=[ 55837], | 70.00th=[ 74974], 80.00th=[ 99091], 90.00th=[137364], 95.00th=[175113], | 99.00th=[261096], 99.50th=[329253], 99.90th=[417334], 99.95th=[517997], | 99.99th=[517997] bw ( KiB/s): min= 7, max= 95, per=25.68%, avg=31.07, stdev=16.94, samples=393 iops : min= 1, max= 23, avg= 7.09, stdev= 4.29, samples=393 lat (usec) : 50=0.42%, 100=1.14%, 500=0.03%, 1000=0.07% lat (msec) : 2=6.18%, 4=1.99%, 10=6.22%, 20=5.89%, 50=24.15% lat (msec) : 100=31.97%, 250=20.67%, 500=1.20%, 750=0.03%, 2000=0.03% cpu : usr=0.04%, sys=2.80%, ctx=6042, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178576: Thu Jul 30 21:47:26 2026 read: IOPS=7, BW=29.4KiB/s (30.1kB/s)(6028KiB/205199msec) clat (usec): min=26, max=490323, avg=75705.23, stdev=51654.06 lat (usec): min=26, max=490324, avg=75708.39, stdev=51653.53 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 16188], 10.00th=[ 25035], 20.00th=[ 35914], | 30.00th=[ 44827], 40.00th=[ 54789], 50.00th=[ 64750], 60.00th=[ 76022], | 70.00th=[ 89654], 80.00th=[109577], 90.00th=[137364], 95.00th=[168821], | 99.00th=[246416], 99.50th=[274727], 99.90th=[480248], 99.95th=[488637], | 99.99th=[488637] bw ( KiB/s): min= 7, max= 71, per=25.47%, avg=29.29, stdev=13.59, samples=394 iops : min= 1, max= 17, avg= 6.64, stdev= 3.45, samples=394 write: IOPS=7, BW=30.5KiB/s (31.2kB/s)(6260KiB/205199msec); 0 zone resets clat (usec): min=1045, max=1295.6k, avg=58103.45, stdev=67029.95 lat (usec): min=1045, max=1295.6k, avg=58108.03, stdev=67031.78 clat percentiles (usec): | 1.00th=[ 1139], 5.00th=[ 1287], 10.00th=[ 1778], | 20.00th=[ 6456], 30.00th=[ 12518], 40.00th=[ 28181], | 50.00th=[ 41681], 60.00th=[ 55837], 70.00th=[ 72877], | 80.00th=[ 95945], 90.00th=[ 137364], 95.00th=[ 175113], | 99.00th=[ 265290], 99.50th=[ 312476], 99.90th=[ 396362], | 99.95th=[1300235], 99.99th=[1300235] bw ( KiB/s): min= 7, max= 95, per=25.32%, avg=30.64, stdev=15.52, samples=392 iops : min= 1, max= 23, avg= 6.98, stdev= 3.93, samples=392 lat (usec) : 50=0.52%, 100=1.17%, 500=0.07%, 1000=0.03% lat (msec) : 2=5.47%, 4=1.89%, 10=6.58%, 20=5.24%, 50=24.84% lat (msec) : 100=32.19%, 250=20.90%, 500=1.07%, 2000=0.03% cpu : usr=0.04%, sys=2.95%, ctx=5914, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178577: Thu Jul 30 21:47:26 2026 read: IOPS=7, BW=29.2KiB/s (29.9kB/s)(6052KiB/207030msec) clat (usec): min=38, max=376746, avg=75080.84, stdev=49891.40 lat (usec): min=39, max=376747, avg=75084.16, stdev=49891.37 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 13173], 10.00th=[ 25035], 20.00th=[ 36439], | 30.00th=[ 45876], 40.00th=[ 55313], 50.00th=[ 65799], 60.00th=[ 76022], | 70.00th=[ 90702], 80.00th=[107480], 90.00th=[137364], 95.00th=[168821], | 99.00th=[248513], 99.50th=[278922], 99.90th=[341836], 99.95th=[375391], | 99.99th=[375391] bw ( KiB/s): min= 7, max= 136, per=25.53%, avg=29.36, stdev=14.55, samples=395 iops : min= 1, max= 34, avg= 6.66, stdev= 3.67, samples=395 write: IOPS=7, BW=30.1KiB/s (30.8kB/s)(6236KiB/207030msec); 0 zone resets clat (usec): min=1022, max=1290.5k, avg=59720.75, stdev=69743.98 lat (usec): min=1023, max=1290.6k, avg=59726.46, stdev=69746.56 clat percentiles (usec): | 1.00th=[ 1156], 5.00th=[ 1270], 10.00th=[ 1467], | 20.00th=[ 6063], 30.00th=[ 12649], 40.00th=[ 25822], | 50.00th=[ 40633], 60.00th=[ 55837], 70.00th=[ 77071], | 80.00th=[ 103285], 90.00th=[ 143655], 95.00th=[ 185598], | 99.00th=[ 278922], 99.50th=[ 312476], 99.90th=[ 429917], | 99.95th=[1283458], 99.99th=[1283458] bw ( KiB/s): min= 7, max= 112, per=24.99%, avg=30.24, stdev=16.19, samples=395 iops : min= 1, max= 28, avg= 6.89, stdev= 4.11, samples=395 lat (usec) : 50=0.42%, 100=1.37%, 250=0.13%, 500=0.03%, 750=0.03% lat (msec) : 2=5.83%, 4=1.99%, 10=5.76%, 20=6.48%, 50=23.44% lat (msec) : 100=32.16%, 250=21.13%, 500=1.20%, 2000=0.03% cpu : usr=0.04%, sys=2.92%, ctx=6103, 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=116KiB/s (119kB/s), 28.9KiB/s-29.4KiB/s (29.6kB/s-30.1kB/s), io=23.4MiB (24.6MB), run=205199-207030msec WRITE: bw=121KiB/s (124kB/s), 30.1KiB/s-30.8KiB/s (30.8kB/s-31.6kB/s), io=24.6MiB (25.7MB), run=205199-207030msec rand-rw: (groupid=0, jobs=1): err= 0: pid=178569: Thu Jul 30 21:48:12 2026 read: IOPS=5, BW=23.7KiB/s (24.2kB/s)(5992KiB/253219msec) clat (msec): min=5, max=1382, avg=68.15, stdev=77.86 lat (msec): min=5, max=1382, avg=68.16, stdev=77.87 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 21], | 30.00th=[ 27], 40.00th=[ 34], 50.00th=[ 42], 60.00th=[ 53], | 70.00th=[ 70], 80.00th=[ 97], 90.00th=[ 165], 95.00th=[ 220], | 99.00th=[ 351], 99.50th=[ 384], 99.90th=[ 542], 99.95th=[ 1385], | 99.99th=[ 1385] bw ( KiB/s): min= 7, max= 127, per=27.22%, avg=25.58, stdev=21.21, samples=447 iops : min= 1, max= 31, avg= 5.70, stdev= 5.34, samples=447 write: IOPS=6, BW=24.9KiB/s (25.5kB/s)(6296KiB/253219msec); 0 zone resets clat (msec): min=10, max=728, avg=95.65, stdev=79.89 lat (msec): min=10, max=728, avg=95.65, stdev=79.89 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 23], 10.00th=[ 27], 20.00th=[ 35], | 30.00th=[ 42], 40.00th=[ 53], 50.00th=[ 66], 60.00th=[ 85], | 70.00th=[ 116], 80.00th=[ 159], 90.00th=[ 205], 95.00th=[ 251], | 99.00th=[ 359], 99.50th=[ 435], 99.90th=[ 575], 99.95th=[ 726], | 99.99th=[ 726] bw ( KiB/s): min= 7, max= 110, per=26.05%, avg=25.79, stdev=20.32, samples=467 iops : min= 1, max= 27, avg= 5.75, stdev= 5.13, samples=467 lat (msec) : 10=1.56%, 20=9.11%, 50=37.27%, 100=25.10%, 250=22.66% lat (msec) : 500=4.17%, 750=0.10%, 2000=0.03% cpu : usr=0.03%, sys=1.25%, ctx=4731, 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=178570: Thu Jul 30 21:48:12 2026 read: IOPS=5, BW=23.4KiB/s (23.0kB/s)(5940KiB/253612msec) clat (msec): min=5, max=1322, avg=65.49, stdev=73.63 lat (msec): min=5, max=1322, avg=65.49, stdev=73.63 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 20], | 30.00th=[ 26], 40.00th=[ 32], 50.00th=[ 41], 60.00th=[ 51], | 70.00th=[ 67], 80.00th=[ 97], 90.00th=[ 155], 95.00th=[ 205], | 99.00th=[ 317], 99.50th=[ 368], 99.90th=[ 584], 99.95th=[ 1318], | 99.99th=[ 1318] bw ( KiB/s): min= 7, max= 120, per=27.79%, avg=26.12, stdev=21.44, samples=436 iops : min= 1, max= 30, avg= 5.84, stdev= 5.41, samples=436 write: IOPS=6, BW=25.0KiB/s (25.6kB/s)(6348KiB/253612msec); 0 zone resets clat (msec): min=10, max=626, avg=98.20, stdev=84.74 lat (msec): min=10, max=626, avg=98.20, stdev=84.74 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 23], 10.00th=[ 28], 20.00th=[ 36], | 30.00th=[ 44], 40.00th=[ 53], 50.00th=[ 67], 60.00th=[ 88], | 70.00th=[ 113], 80.00th=[ 157], 90.00th=[ 213], 95.00th=[ 266], | 99.00th=[ 409], 99.50th=[ 489], 99.90th=[ 567], 99.95th=[ 625], | 99.99th=[ 625] bw ( KiB/s): min= 7, max= 119, per=26.03%, avg=25.77, stdev=20.08, samples=471 iops : min= 1, max= 29, avg= 5.75, stdev= 5.07, samples=471 lat (msec) : 10=1.40%, 20=10.06%, 50=36.56%, 100=24.77%, 250=22.88% lat (msec) : 500=4.04%, 750=0.26%, 2000=0.03% cpu : usr=0.03%, sys=1.25%, ctx=4799, 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=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=178571: Thu Jul 30 21:48:12 2026 read: IOPS=5, BW=23.9KiB/s (24.5kB/s)(6028KiB/252159msec) clat (msec): min=5, max=516, avg=67.27, stdev=68.96 lat (msec): min=5, max=516, avg=67.27, stdev=68.96 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 22], | 30.00th=[ 27], 40.00th=[ 34], 50.00th=[ 44], 60.00th=[ 54], | 70.00th=[ 70], 80.00th=[ 97], 90.00th=[ 157], 95.00th=[ 209], | 99.00th=[ 359], 99.50th=[ 388], 99.90th=[ 498], 99.95th=[ 518], | 99.99th=[ 518] bw ( KiB/s): min= 7, max= 106, per=27.22%, avg=25.59, stdev=20.21, samples=451 iops : min= 1, max= 26, avg= 5.70, stdev= 5.10, samples=451 write: IOPS=6, BW=24.8KiB/s (25.4kB/s)(6260KiB/252159msec); 0 zone resets clat (msec): min=9, max=1345, avg=96.01, stdev=85.84 lat (msec): min=9, max=1345, avg=96.02, stdev=85.84 clat percentiles (msec): | 1.00th=[ 17], 5.00th=[ 22], 10.00th=[ 27], 20.00th=[ 34], | 30.00th=[ 42], 40.00th=[ 52], 50.00th=[ 64], 60.00th=[ 85], | 70.00th=[ 117], 80.00th=[ 157], 90.00th=[ 205], 95.00th=[ 251], | 99.00th=[ 359], 99.50th=[ 422], 99.90th=[ 709], 99.95th=[ 1351], | 99.99th=[ 1351] bw ( KiB/s): min= 7, max= 112, per=26.13%, avg=25.86, stdev=20.65, samples=464 iops : min= 1, max= 28, avg= 5.78, stdev= 5.21, samples=464 lat (msec) : 10=1.11%, 20=9.41%, 50=36.75%, 100=25.39%, 250=23.18% lat (msec) : 500=3.97%, 750=0.16%, 2000=0.03% cpu : usr=0.03%, sys=1.30%, ctx=4809, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178572: Thu Jul 30 21:48:12 2026 read: IOPS=5, BW=23.9KiB/s (24.5kB/s)(6052KiB/252746msec) clat (msec): min=4, max=748, avg=69.39, stdev=71.82 lat (msec): min=4, max=748, avg=69.39, stdev=71.82 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 16], 20.00th=[ 21], | 30.00th=[ 27], 40.00th=[ 33], 50.00th=[ 44], 60.00th=[ 56], | 70.00th=[ 73], 80.00th=[ 107], 90.00th=[ 163], 95.00th=[ 222], | 99.00th=[ 321], 99.50th=[ 409], 99.90th=[ 460], 99.95th=[ 751], | 99.99th=[ 751] bw ( KiB/s): min= 7, max= 119, per=27.92%, avg=26.24, stdev=21.39, samples=444 iops : min= 1, max= 29, avg= 5.87, stdev= 5.39, samples=444 write: IOPS=6, BW=24.7KiB/s (25.3kB/s)(6236KiB/252746msec); 0 zone resets clat (msec): min=9, max=1355, avg=94.46, stdev=83.82 lat (msec): min=9, max=1355, avg=94.47, stdev=83.82 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 22], 10.00th=[ 26], 20.00th=[ 34], | 30.00th=[ 43], 40.00th=[ 52], 50.00th=[ 65], 60.00th=[ 86], | 70.00th=[ 112], 80.00th=[ 150], 90.00th=[ 201], 95.00th=[ 253], | 99.00th=[ 372], 99.50th=[ 430], 99.90th=[ 523], 99.95th=[ 1351], | 99.99th=[ 1351] bw ( KiB/s): min= 7, max= 119, per=26.11%, avg=25.85, stdev=20.94, samples=464 iops : min= 1, max= 29, avg= 5.77, stdev= 5.28, samples=464 lat (msec) : 10=1.27%, 20=10.38%, 50=35.06%, 100=25.26%, 250=23.76% lat (msec) : 500=4.10%, 750=0.13%, 2000=0.03% cpu : usr=0.02%, sys=1.24%, ctx=4641, 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=94.7KiB/s (96.0kB/s), 23.4KiB/s-23.9KiB/s (23.0kB/s-24.5kB/s), io=23.4MiB (24.6MB), run=252159-253612msec WRITE: bw=99.1KiB/s (102kB/s), 24.7KiB/s-25.0KiB/s (25.3kB/s-25.6kB/s), io=24.6MiB (25.7MB), run=252159-253612msec 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=178632: Thu Jul 30 21:49:00 2026 read: IOPS=10, BW=169KiB/s (173kB/s)(5920KiB/35013msec) clat (usec): min=29, max=235835, avg=47120.51, stdev=34684.51 lat (usec): min=30, max=235836, avg=47122.15, stdev=34684.97 clat percentiles (usec): | 1.00th=[ 38], 5.00th=[ 52], 10.00th=[ 65], 20.00th=[ 22938], | 30.00th=[ 30278], 40.00th=[ 34866], 50.00th=[ 41157], 60.00th=[ 48497], | 70.00th=[ 57934], 80.00th=[ 67634], 90.00th=[ 89654], 95.00th=[112722], | 99.00th=[166724], 99.50th=[183501], 99.90th=[235930], 99.95th=[235930], | 99.99th=[235930] bw ( KiB/s): min= 61, max= 439, per=25.47%, avg=168.86, stdev=74.43, samples=69 iops : min= 3, max= 27, avg= 9.84, stdev= 4.70, samples=69 write: IOPS=11, BW=182KiB/s (186kB/s)(6368KiB/35013msec); 0 zone resets clat (usec): min=1352, max=279923, avg=43915.35, stdev=43916.26 lat (usec): min=1352, max=279925, avg=43918.86, stdev=43918.15 clat percentiles (usec): | 1.00th=[ 1516], 5.00th=[ 1844], 10.00th=[ 3163], 20.00th=[ 6128], | 30.00th=[ 10683], 40.00th=[ 22938], 50.00th=[ 31327], 60.00th=[ 41157], | 70.00th=[ 58459], 80.00th=[ 74974], 90.00th=[102237], 95.00th=[130548], | 99.00th=[191890], 99.50th=[225444], 99.90th=[278922], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 62, max= 476, per=25.97%, avg=181.28, stdev=77.94, samples=69 iops : min= 3, max= 29, avg=10.62, stdev= 4.94, samples=69 lat (usec) : 50=1.82%, 100=3.78%, 250=0.26%, 500=0.13% lat (msec) : 2=3.65%, 4=3.12%, 10=8.72%, 20=6.38%, 50=34.64% lat (msec) : 100=28.91%, 250=8.46%, 500=0.13% cpu : usr=0.05%, sys=4.31%, ctx=1544, 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=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=178633: Thu Jul 30 21:49:00 2026 read: IOPS=9, BW=159KiB/s (163kB/s)(5744KiB/36094msec) clat (usec): min=31, max=204881, avg=51215.58, stdev=32826.95 lat (usec): min=32, max=204896, avg=51218.74, stdev=32828.76 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 60], 10.00th=[ 1123], 20.00th=[ 27132], | 30.00th=[ 35390], 40.00th=[ 41681], 50.00th=[ 47973], 60.00th=[ 54789], | 70.00th=[ 62653], 80.00th=[ 72877], 90.00th=[ 88605], 95.00th=[106431], | 99.00th=[162530], 99.50th=[200279], 99.90th=[204473], 99.95th=[204473], | 99.99th=[204473] bw ( KiB/s): min= 31, max= 320, per=23.96%, avg=158.83, stdev=67.85, samples=71 iops : min= 1, max= 20, avg= 9.20, stdev= 4.32, samples=71 write: IOPS=11, BW=181KiB/s (186kB/s)(6544KiB/36094msec); 0 zone resets clat (usec): min=1346, max=233381, avg=42818.76, stdev=42061.53 lat (usec): min=1348, max=233384, avg=42821.97, stdev=42062.97 clat percentiles (usec): | 1.00th=[ 1532], 5.00th=[ 1745], 10.00th=[ 2638], 20.00th=[ 5932], | 30.00th=[ 9896], 40.00th=[ 19268], 50.00th=[ 31065], 60.00th=[ 43254], | 70.00th=[ 56886], 80.00th=[ 77071], 90.00th=[ 99091], 95.00th=[126354], | 99.00th=[173016], 99.50th=[202376], 99.90th=[233833], 99.95th=[233833], | 99.99th=[233833] bw ( KiB/s): min= 31, max= 404, per=25.88%, avg=180.63, stdev=80.49, samples=71 iops : min= 1, max= 25, avg=10.58, stdev= 5.13, samples=71 lat (usec) : 50=0.78%, 100=3.26%, 250=0.39%, 500=0.13% lat (msec) : 2=4.04%, 4=3.52%, 10=8.72%, 20=6.51%, 50=33.72% lat (msec) : 100=30.47%, 250=8.46% cpu : usr=0.05%, sys=4.26%, ctx=1588, 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=178634: Thu Jul 30 21:49:00 2026 read: IOPS=10, BW=175KiB/s (180kB/s)(6256KiB/35664msec) clat (usec): min=40, max=301659, avg=53139.64, stdev=34813.96 lat (usec): min=41, max=301660, avg=53140.97, stdev=34813.86 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 58], 10.00th=[ 14746], 20.00th=[ 26870], | 30.00th=[ 35914], 40.00th=[ 41681], 50.00th=[ 49021], 60.00th=[ 58459], | 70.00th=[ 64750], 80.00th=[ 77071], 90.00th=[ 92799], 95.00th=[107480], | 99.00th=[162530], 99.50th=[200279], 99.90th=[299893], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 59, max= 349, per=26.89%, avg=178.28, stdev=70.25, samples=69 iops : min= 3, max= 21, avg=10.42, stdev= 4.46, samples=69 write: IOPS=10, BW=169KiB/s (173kB/s)(6032KiB/35664msec); 0 zone resets clat (usec): min=1301, max=214609, avg=38992.09, stdev=40324.69 lat (usec): min=1302, max=214611, avg=38993.99, stdev=40324.55 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1762], 10.00th=[ 3032], 20.00th=[ 5669], | 30.00th=[ 8356], 40.00th=[ 16909], 50.00th=[ 25560], 60.00th=[ 36439], | 70.00th=[ 49546], 80.00th=[ 70779], 90.00th=[ 92799], 95.00th=[120062], | 99.00th=[189793], 99.50th=[212861], 99.90th=[214959], 99.95th=[214959], | 99.99th=[214959] bw ( KiB/s): min= 31, max= 384, per=23.99%, avg=167.43, stdev=83.43, samples=70 iops : min= 1, max= 24, avg= 9.74, stdev= 5.34, samples=70 lat (usec) : 50=0.78%, 100=3.52%, 250=0.13% lat (msec) : 2=3.91%, 4=3.12%, 10=9.11%, 20=6.77%, 50=33.33% lat (msec) : 100=31.77%, 250=7.42%, 500=0.13% cpu : usr=0.06%, sys=4.35%, ctx=1649, 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=178635: Thu Jul 30 21:49:00 2026 read: IOPS=11, BW=178KiB/s (183kB/s)(6032KiB/33797msec) clat (usec): min=36, max=238399, avg=49942.46, stdev=35554.05 lat (usec): min=36, max=238401, avg=49943.67, stdev=35554.00 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 54], 10.00th=[ 63], 20.00th=[ 24773], | 30.00th=[ 33424], 40.00th=[ 39584], 50.00th=[ 45351], 60.00th=[ 51643], | 70.00th=[ 61080], 80.00th=[ 72877], 90.00th=[ 91751], 95.00th=[109577], | 99.00th=[181404], 99.50th=[198181], 99.90th=[238027], 99.95th=[238027], | 99.99th=[238027] bw ( KiB/s): min= 60, max= 383, per=26.82%, avg=177.80, stdev=70.98, samples=66 iops : min= 3, max= 23, avg=10.39, stdev= 4.53, samples=66 write: IOPS=11, BW=185KiB/s (190kB/s)(6256KiB/33797msec); 0 zone resets clat (usec): min=1443, max=169334, avg=37736.75, stdev=37561.96 lat (usec): min=1444, max=169335, avg=37738.49, stdev=37562.01 clat percentiles (usec): | 1.00th=[ 1549], 5.00th=[ 1795], 10.00th=[ 2900], 20.00th=[ 5473], | 30.00th=[ 9241], 40.00th=[ 15926], 50.00th=[ 26084], 60.00th=[ 36439], | 70.00th=[ 49021], 80.00th=[ 68682], 90.00th=[ 93848], 95.00th=[114820], | 99.00th=[162530], 99.50th=[166724], 99.90th=[168821], 99.95th=[168821], | 99.99th=[168821] bw ( KiB/s): min= 61, max= 384, per=27.02%, avg=188.58, stdev=78.68, samples=65 iops : min= 3, max= 24, avg=11.09, stdev= 5.02, samples=65 lat (usec) : 50=1.56%, 100=4.56%, 500=0.26%, 750=0.26% lat (msec) : 2=3.91%, 4=3.78%, 10=9.24%, 20=6.64%, 50=34.51% lat (msec) : 100=27.47%, 250=7.81% cpu : usr=0.07%, sys=4.41%, ctx=1563, 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=664KiB/s (680kB/s), 159KiB/s-178KiB/s (163kB/s-183kB/s), io=23.4MiB (24.5MB), run=33797-36094msec WRITE: bw=698KiB/s (715kB/s), 169KiB/s-185KiB/s (173kB/s-190kB/s), io=24.6MiB (25.8MB), run=33797-36094msec rand-rw: (groupid=0, jobs=1): err= 0: pid=178637: Thu Jul 30 21:49:18 2026 read: IOPS=6, BW=110KiB/s (112kB/s)(5920KiB/53964msec) clat (msec): min=8, max=316, avg=62.74, stdev=46.99 lat (msec): min=8, max=316, avg=62.74, stdev=46.99 clat percentiles (msec): | 1.00th=[ 12], 5.00th=[ 17], 10.00th=[ 20], 20.00th=[ 30], | 30.00th=[ 36], 40.00th=[ 42], 50.00th=[ 50], 60.00th=[ 59], | 70.00th=[ 69], 80.00th=[ 88], 90.00th=[ 124], 95.00th=[ 157], | 99.00th=[ 268], 99.50th=[ 275], 99.90th=[ 317], 99.95th=[ 317], | 99.99th=[ 317] bw ( KiB/s): min= 30, max= 351, per=24.96%, avg=110.56, stdev=62.78, samples=104 iops : min= 1, max= 21, avg= 6.10, stdev= 3.94, samples=104 write: IOPS=7, BW=118KiB/s (121kB/s)(6368KiB/53964msec); 0 zone resets clat (msec): min=16, max=292, avg=77.17, stdev=45.18 lat (msec): min=16, max=292, avg=77.18, stdev=45.18 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 27], 10.00th=[ 34], 20.00th=[ 42], | 30.00th=[ 51], 40.00th=[ 58], 50.00th=[ 65], 60.00th=[ 75], | 70.00th=[ 87], 80.00th=[ 106], 90.00th=[ 140], 95.00th=[ 163], | 99.00th=[ 255], 99.50th=[ 264], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 31, max= 287, per=25.41%, avg=118.39, stdev=55.58, samples=105 iops : min= 1, max= 17, avg= 6.60, stdev= 3.48, samples=105 lat (msec) : 10=0.26%, 20=5.34%, 50=34.11%, 100=41.28%, 250=17.97% lat (msec) : 500=1.04% cpu : usr=0.03%, sys=1.47%, ctx=1294, 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=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=178638: Thu Jul 30 21:49:18 2026 read: IOPS=6, BW=108KiB/s (110kB/s)(5744KiB/53419msec) clat (msec): min=7, max=309, avg=57.60, stdev=43.05 lat (msec): min=7, max=309, avg=57.61, stdev=43.05 clat percentiles (msec): | 1.00th=[ 12], 5.00th=[ 17], 10.00th=[ 22], 20.00th=[ 28], | 30.00th=[ 34], 40.00th=[ 39], 50.00th=[ 46], 60.00th=[ 54], | 70.00th=[ 64], 80.00th=[ 79], 90.00th=[ 107], 95.00th=[ 146], | 99.00th=[ 201], 99.50th=[ 279], 99.90th=[ 309], 99.95th=[ 309], | 99.99th=[ 309] bw ( KiB/s): min= 31, max= 286, per=24.69%, avg=109.37, stdev=63.14, samples=103 iops : min= 1, max= 17, avg= 6.03, stdev= 4.00, samples=103 write: IOPS=7, BW=123KiB/s (125kB/s)(6544KiB/53419msec); 0 zone resets clat (msec): min=12, max=281, avg=79.89, stdev=47.92 lat (msec): min=12, max=281, avg=79.89, stdev=47.92 clat percentiles (msec): | 1.00th=[ 22], 5.00th=[ 30], 10.00th=[ 34], 20.00th=[ 42], | 30.00th=[ 50], 40.00th=[ 58], 50.00th=[ 68], 60.00th=[ 77], | 70.00th=[ 90], 80.00th=[ 113], 90.00th=[ 144], 95.00th=[ 178], | 99.00th=[ 251], 99.50th=[ 262], 99.90th=[ 284], 99.95th=[ 284], | 99.99th=[ 284] bw ( KiB/s): min= 31, max= 286, per=26.11%, avg=121.69, stdev=56.55, samples=105 iops : min= 1, max= 17, avg= 6.81, stdev= 3.58, samples=105 lat (msec) : 10=0.39%, 20=4.04%, 50=38.93%, 100=37.89%, 250=17.84% lat (msec) : 500=0.91% cpu : usr=0.04%, sys=1.62%, ctx=1224, 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=178639: Thu Jul 30 21:49:18 2026 read: IOPS=7, BW=117KiB/s (120kB/s)(6256KiB/53498msec) clat (msec): min=8, max=278, avg=62.17, stdev=41.75 lat (msec): min=8, max=278, avg=62.18, stdev=41.75 clat percentiles (msec): | 1.00th=[ 12], 5.00th=[ 20], 10.00th=[ 24], 20.00th=[ 30], | 30.00th=[ 37], 40.00th=[ 43], 50.00th=[ 50], 60.00th=[ 61], | 70.00th=[ 72], 80.00th=[ 90], 90.00th=[ 114], 95.00th=[ 144], | 99.00th=[ 228], 99.50th=[ 257], 99.90th=[ 279], 99.95th=[ 279], | 99.99th=[ 279] bw ( KiB/s): min= 31, max= 377, per=26.39%, avg=116.90, stdev=65.98, samples=105 iops : min= 1, max= 23, avg= 6.51, stdev= 4.18, samples=105 write: IOPS=7, BW=113KiB/s (115kB/s)(6032KiB/53498msec); 0 zone resets clat (msec): min=18, max=284, avg=77.32, stdev=42.49 lat (msec): min=18, max=284, avg=77.32, stdev=42.49 clat percentiles (msec): | 1.00th=[ 23], 5.00th=[ 31], 10.00th=[ 37], 20.00th=[ 44], | 30.00th=[ 50], 40.00th=[ 57], 50.00th=[ 66], 60.00th=[ 75], | 70.00th=[ 90], 80.00th=[ 113], 90.00th=[ 140], 95.00th=[ 159], | 99.00th=[ 222], 99.50th=[ 268], 99.90th=[ 284], 99.95th=[ 284], | 99.99th=[ 284] bw ( KiB/s): min= 30, max= 282, per=24.44%, avg=113.89, stdev=48.65, samples=103 iops : min= 1, max= 17, avg= 6.32, stdev= 3.08, samples=103 lat (msec) : 10=0.13%, 20=2.73%, 50=38.54%, 100=38.15%, 250=19.79% lat (msec) : 500=0.65% cpu : usr=0.05%, sys=1.54%, ctx=1195, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178640: Thu Jul 30 21:49:18 2026 read: IOPS=7, BW=116KiB/s (119kB/s)(6032KiB/51879msec) clat (msec): min=8, max=290, avg=57.23, stdev=39.16 lat (msec): min=8, max=290, avg=57.23, stdev=39.16 clat percentiles (msec): | 1.00th=[ 12], 5.00th=[ 20], 10.00th=[ 24], 20.00th=[ 30], | 30.00th=[ 36], 40.00th=[ 42], 50.00th=[ 48], 60.00th=[ 57], | 70.00th=[ 64], 80.00th=[ 73], 90.00th=[ 103], 95.00th=[ 130], | 99.00th=[ 230], 99.50th=[ 253], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 30, max= 285, per=26.61%, avg=117.90, stdev=57.93, samples=100 iops : min= 1, max= 17, avg= 6.58, stdev= 3.63, samples=100 write: IOPS=7, BW=121KiB/s (123kB/s)(6256KiB/51879msec); 0 zone resets clat (msec): min=11, max=296, avg=77.39, stdev=46.37 lat (msec): min=11, max=297, avg=77.39, stdev=46.37 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 28], 10.00th=[ 32], 20.00th=[ 42], | 30.00th=[ 48], 40.00th=[ 56], 50.00th=[ 63], 60.00th=[ 74], | 70.00th=[ 92], 80.00th=[ 110], 90.00th=[ 138], 95.00th=[ 163], | 99.00th=[ 245], 99.50th=[ 288], 99.90th=[ 296], 99.95th=[ 296], | 99.99th=[ 296] bw ( KiB/s): min= 30, max= 282, per=25.85%, avg=120.45, stdev=55.87, samples=102 iops : min= 1, max= 17, avg= 6.74, stdev= 3.50, samples=102 lat (msec) : 10=0.13%, 20=3.12%, 50=39.06%, 100=39.58%, 250=17.45% lat (msec) : 500=0.65% cpu : usr=0.05%, sys=1.59%, ctx=1220, 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=444KiB/s (455kB/s), 108KiB/s-117KiB/s (110kB/s-120kB/s), io=23.4MiB (24.5MB), run=51879-53964msec WRITE: bw=467KiB/s (478kB/s), 113KiB/s-123KiB/s (115kB/s-125kB/s), io=24.6MiB (25.8MB), run=51879-53964msec 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=178657: Thu Jul 30 21:49:41 2026 read: IOPS=1, BW=1032KiB/s (1057kB/s)(7168KiB/6946msec) clat (usec): min=1581, max=3307.8k, avg=639862.22, stdev=1183704.37 lat (usec): min=1583, max=3307.8k, avg=639863.76, stdev=1183704.87 clat percentiles (usec): | 1.00th=[ 1582], 5.00th=[ 1582], 10.00th=[ 1582], | 20.00th=[ 126354], 30.00th=[ 127402], 40.00th=[ 127402], | 50.00th=[ 221250], 60.00th=[ 278922], 70.00th=[ 278922], | 80.00th=[ 417334], 90.00th=[3305112], 95.00th=[3305112], | 99.00th=[3305112], 99.50th=[3305112], 99.90th=[3305112], | 99.95th=[3305112], 99.99th=[3305112] bw ( KiB/s): min= 1996, max= 6071, per=100.00%, avg=3037.25, stdev=2022.61, samples=4 iops : min= 1, max= 5, avg= 2.00, stdev= 2.00, samples=4 write: IOPS=0, BW=737KiB/s (755kB/s)(5120KiB/6946msec); 0 zone resets clat (msec): min=152, max=1129, avg=468.79, stdev=413.95 lat (msec): min=153, max=1129, avg=468.89, stdev=413.90 clat percentiles (msec): | 1.00th=[ 153], 5.00th=[ 153], 10.00th=[ 153], 20.00th=[ 153], | 30.00th=[ 184], 40.00th=[ 184], 50.00th=[ 259], 60.00th=[ 259], | 70.00th=[ 617], 80.00th=[ 617], 90.00th=[ 1133], 95.00th=[ 1133], | 99.00th=[ 1133], 99.50th=[ 1133], 99.90th=[ 1133], 99.95th=[ 1133], | 99.99th=[ 1133] bw ( KiB/s): min= 2035, max= 3961, per=78.82%, avg=2678.33, stdev=1110.82, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 2=8.33%, 250=41.67%, 500=25.00%, 750=8.33%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=6.65%, ctx=631, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178658: Thu Jul 30 21:49:41 2026 read: IOPS=0, BW=243KiB/s (249kB/s)(2048KiB/8436msec) clat (msec): min=474, max=527, avg=501.18, stdev=37.52 lat (msec): min=474, max=527, avg=501.18, stdev=37.52 clat percentiles (msec): | 1.00th=[ 477], 5.00th=[ 477], 10.00th=[ 477], 20.00th=[ 477], | 30.00th=[ 477], 40.00th=[ 477], 50.00th=[ 477], 60.00th=[ 527], | 70.00th=[ 527], 80.00th=[ 527], 90.00th=[ 527], 95.00th=[ 527], | 99.00th=[ 527], 99.50th=[ 527], 99.90th=[ 527], 99.95th=[ 527], | 99.99th=[ 527] bw ( KiB/s): min= 2027, max= 2031, per=83.60%, avg=2029.00, stdev= 2.83, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1214KiB/s (1243kB/s)(10.0MiB/8436msec); 0 zone resets clat (msec): min=128, max=3537, avg=736.81, stdev=1016.74 lat (msec): min=128, max=3538, avg=737.44, stdev=1016.93 clat percentiles (msec): | 1.00th=[ 129], 5.00th=[ 129], 10.00th=[ 129], 20.00th=[ 203], | 30.00th=[ 230], 40.00th=[ 313], 50.00th=[ 355], 60.00th=[ 472], | 70.00th=[ 502], 80.00th=[ 609], 90.00th=[ 1020], 95.00th=[ 3540], | 99.00th=[ 3540], 99.50th=[ 3540], 99.90th=[ 3540], 99.95th=[ 3540], | 99.99th=[ 3540] bw ( KiB/s): min= 1744, max= 4087, per=88.05%, avg=2992.00, stdev=1158.59, samples=6 iops : min= 1, max= 3, avg= 2.00, stdev= 1.10, samples=6 lat (msec) : 250=25.00%, 500=33.33%, 750=25.00%, 2000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=5.44%, ctx=163, 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=178659: Thu Jul 30 21:49:41 2026 read: IOPS=0, BW=861KiB/s (881kB/s)(6144KiB/7140msec) clat (usec): min=554, max=919627, avg=162964.88, stdev=371269.55 lat (usec): min=555, max=919628, avg=162965.63, stdev=371269.65 clat percentiles (usec): | 1.00th=[ 553], 5.00th=[ 553], 10.00th=[ 553], 20.00th=[ 586], | 30.00th=[ 586], 40.00th=[ 1450], 50.00th=[ 1450], 60.00th=[ 2376], | 70.00th=[ 53216], 80.00th=[ 53216], 90.00th=[918553], 95.00th=[918553], | 99.00th=[918553], 99.50th=[918553], 99.90th=[918553], 99.95th=[918553], | 99.99th=[918553] bw ( KiB/s): min= 2043, max= 4071, per=100.00%, avg=3368.67, stdev=1148.74, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=0, BW=861KiB/s (881kB/s)(6144KiB/7140msec); 0 zone resets clat (msec): min=251, max=3320, avg=1003.83, stdev=1149.81 lat (msec): min=251, max=3320, avg=1003.90, stdev=1149.81 clat percentiles (msec): | 1.00th=[ 251], 5.00th=[ 251], 10.00th=[ 251], 20.00th=[ 485], | 30.00th=[ 485], 40.00th=[ 493], 50.00th=[ 493], 60.00th=[ 693], | 70.00th=[ 785], 80.00th=[ 785], 90.00th=[ 3306], 95.00th=[ 3306], | 99.00th=[ 3306], 99.50th=[ 3306], 99.90th=[ 3306], 99.95th=[ 3306], | 99.99th=[ 3306] bw ( KiB/s): min= 1771, max= 4096, per=72.82%, avg=2474.50, stdev=1087.24, samples=4 iops : min= 1, max= 4, avg= 1.75, stdev= 1.50, samples=4 lat (usec) : 750=16.67% lat (msec) : 2=8.33%, 4=8.33%, 100=8.33%, 500=25.00%, 750=8.33% lat (msec) : 1000=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=4.10%, ctx=84, 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=178661: Thu Jul 30 21:49:41 2026 read: IOPS=0, BW=725KiB/s (742kB/s)(5120KiB/7064msec) clat (usec): min=438, max=194688, avg=96811.45, stdev=92850.86 lat (usec): min=439, max=194689, avg=96812.61, stdev=92850.61 clat percentiles (usec): | 1.00th=[ 441], 5.00th=[ 441], 10.00th=[ 441], 20.00th=[ 441], | 30.00th=[ 523], 40.00th=[ 523], 50.00th=[113771], 60.00th=[113771], | 70.00th=[175113], 80.00th=[175113], 90.00th=[193987], 95.00th=[193987], | 99.00th=[193987], 99.50th=[193987], 99.90th=[193987], 99.95th=[193987], | 99.99th=[193987] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1015KiB/s (1039kB/s)(7168KiB/7064msec); 0 zone resets clat (msec): min=170, max=3125, avg=899.91, stdev=1019.45 lat (msec): min=170, max=3125, avg=900.02, stdev=1019.42 clat percentiles (msec): | 1.00th=[ 171], 5.00th=[ 171], 10.00th=[ 171], 20.00th=[ 288], | 30.00th=[ 355], 40.00th=[ 355], 50.00th=[ 701], 60.00th=[ 709], | 70.00th=[ 709], 80.00th=[ 953], 90.00th=[ 3138], 95.00th=[ 3138], | 99.00th=[ 3138], 99.50th=[ 3138], 99.90th=[ 3138], 99.95th=[ 3138], | 99.99th=[ 3138] bw ( KiB/s): min= 1744, max= 3984, per=69.62%, avg=2365.80, stdev=913.27, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (usec) : 500=8.33%, 750=8.33% lat (msec) : 250=33.33%, 500=16.67%, 750=16.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.03%, sys=5.39%, ctx=133, 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=2428KiB/s (2486kB/s), 243KiB/s-1032KiB/s (249kB/s-1057kB/s), io=20.0MiB (20.0MB), run=6946-8436msec WRITE: bw=3399KiB/s (3480kB/s), 737KiB/s-1214KiB/s (755kB/s-1243kB/s), io=28.0MiB (29.4MB), run=6946-8436msec rand-rw: (groupid=0, jobs=1): err= 0: pid=178660: Thu Jul 30 21:49:42 2026 read: IOPS=0, BW=807KiB/s (827kB/s)(7168KiB/8879msec) clat (msec): min=135, max=3101, avg=1066.96, stdev=1175.41 lat (msec): min=135, max=3101, avg=1066.96, stdev=1175.41 clat percentiles (msec): | 1.00th=[ 136], 5.00th=[ 136], 10.00th=[ 136], 20.00th=[ 165], | 30.00th=[ 190], 40.00th=[ 190], 50.00th=[ 279], 60.00th=[ 1737], | 70.00th=[ 1737], 80.00th=[ 1871], 90.00th=[ 3104], 95.00th=[ 3104], | 99.00th=[ 3104], 99.50th=[ 3104], 99.90th=[ 3104], 99.95th=[ 3104], | 99.99th=[ 3104] bw ( KiB/s): min= 1973, max= 4071, per=100.00%, avg=2527.50, stdev=1029.42, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=0, BW=577KiB/s (590kB/s)(5120KiB/8879msec); 0 zone resets clat (msec): min=154, max=275, avg=212.06, stdev=52.76 lat (msec): min=154, max=275, avg=212.14, stdev=52.77 clat percentiles (msec): | 1.00th=[ 155], 5.00th=[ 155], 10.00th=[ 155], 20.00th=[ 155], | 30.00th=[ 178], 40.00th=[ 178], 50.00th=[ 194], 60.00th=[ 194], | 70.00th=[ 262], 80.00th=[ 262], 90.00th=[ 275], 95.00th=[ 275], | 99.00th=[ 275], 99.50th=[ 275], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 2023, max= 4079, per=100.00%, avg=3051.00, stdev=1453.81, samples=2 iops : min= 1, max= 3, avg= 2.00, stdev= 1.41, samples=2 lat (msec) : 250=50.00%, 500=25.00%, 2000=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=0.61%, ctx=58, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=7,5,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178662: Thu Jul 30 21:49:42 2026 read: IOPS=0, BW=230KiB/s (236kB/s)(2048KiB/8888msec) clat (msec): min=185, max=222, avg=203.91, stdev=25.62 lat (msec): min=185, max=222, avg=203.91, stdev=25.62 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=[ 222], | 70.00th=[ 222], 80.00th=[ 222], 90.00th=[ 222], 95.00th=[ 222], | 99.00th=[ 222], 99.50th=[ 222], 99.90th=[ 222], 99.95th=[ 222], | 99.99th=[ 222] bw ( KiB/s): min= 1882, max= 2023, per=91.24%, avg=1952.50, stdev=99.70, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1152KiB/s (1180kB/s)(10.0MiB/8888msec); 0 zone resets clat (msec): min=142, max=4229, avg=832.89, stdev=1213.62 lat (msec): min=142, max=4229, avg=832.99, stdev=1213.60 clat percentiles (msec): | 1.00th=[ 142], 5.00th=[ 142], 10.00th=[ 142], 20.00th=[ 199], | 30.00th=[ 288], 40.00th=[ 422], 50.00th=[ 464], 60.00th=[ 493], | 70.00th=[ 558], 80.00th=[ 642], 90.00th=[ 902], 95.00th=[ 4245], | 99.00th=[ 4245], 99.50th=[ 4245], 99.90th=[ 4245], 99.95th=[ 4245], | 99.99th=[ 4245] bw ( KiB/s): min= 1838, max= 4047, per=75.27%, avg=2255.13, stdev=727.30, samples=8 iops : min= 1, max= 3, avg= 1.38, stdev= 0.74, samples=8 lat (msec) : 250=33.33%, 500=33.33%, 750=16.67%, 1000=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.18%, ctx=115, 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=178663: Thu Jul 30 21:49:42 2026 read: IOPS=0, BW=668KiB/s (684kB/s)(6144KiB/9198msec) clat (msec): min=179, max=901, avg=494.17, stdev=333.57 lat (msec): min=179, max=901, avg=494.17, stdev=333.57 clat percentiles (msec): | 1.00th=[ 180], 5.00th=[ 180], 10.00th=[ 180], 20.00th=[ 184], | 30.00th=[ 184], 40.00th=[ 234], 50.00th=[ 234], 60.00th=[ 659], | 70.00th=[ 810], 80.00th=[ 810], 90.00th=[ 902], 95.00th=[ 902], | 99.00th=[ 902], 99.50th=[ 902], 99.90th=[ 902], 99.95th=[ 902], | 99.99th=[ 902] bw ( KiB/s): min= 1838, max= 2043, per=92.93%, avg=1988.60, stdev=87.08, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 write: IOPS=0, BW=668KiB/s (684kB/s)(6144KiB/9198msec); 0 zone resets clat (msec): min=235, max=3522, avg=1021.93, stdev=1263.12 lat (msec): min=235, max=3522, avg=1022.03, stdev=1263.10 clat percentiles (msec): | 1.00th=[ 236], 5.00th=[ 236], 10.00th=[ 236], 20.00th=[ 296], | 30.00th=[ 296], 40.00th=[ 338], 50.00th=[ 338], 60.00th=[ 693], | 70.00th=[ 1053], 80.00th=[ 1053], 90.00th=[ 3507], 95.00th=[ 3507], | 99.00th=[ 3507], 99.50th=[ 3507], 99.90th=[ 3507], 99.95th=[ 3507], | 99.99th=[ 3507] bw ( KiB/s): min= 1973, max= 2048, per=67.04%, avg=2008.60, stdev=29.40, samples=5 iops : min= 1, max= 2, avg= 1.20, stdev= 0.45, samples=5 lat (msec) : 250=33.33%, 500=16.67%, 750=16.67%, 1000=16.67%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=1.16%, ctx=104, 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=178664: Thu Jul 30 21:49:42 2026 read: IOPS=0, BW=535KiB/s (548kB/s)(5120KiB/9567msec) clat (msec): min=179, max=975, avg=458.90, stdev=341.34 lat (msec): min=179, max=975, avg=458.90, stdev=341.34 clat percentiles (msec): | 1.00th=[ 180], 5.00th=[ 180], 10.00th=[ 180], 20.00th=[ 180], | 30.00th=[ 232], 40.00th=[ 232], 50.00th=[ 268], 60.00th=[ 268], | 70.00th=[ 642], 80.00th=[ 642], 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= 1988, max= 4079, per=100.00%, avg=2696.67, stdev=1197.26, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=0, BW=749KiB/s (767kB/s)(7168KiB/9567msec); 0 zone resets clat (msec): min=186, max=3339, avg=972.55, stdev=1113.91 lat (msec): min=186, max=3339, avg=972.62, stdev=1113.91 clat percentiles (msec): | 1.00th=[ 188], 5.00th=[ 188], 10.00th=[ 188], 20.00th=[ 192], | 30.00th=[ 201], 40.00th=[ 201], 50.00th=[ 885], 60.00th=[ 944], | 70.00th=[ 944], 80.00th=[ 1062], 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= 1838, max= 4007, per=80.00%, avg=2396.80, stdev=904.64, samples=5 iops : min= 1, max= 3, avg= 1.80, stdev= 0.84, samples=5 lat (msec) : 250=41.67%, 500=8.33%, 750=8.33%, 1000=25.00%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=2.50%, ctx=130, 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=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=2141KiB/s (2192kB/s), 230KiB/s-807KiB/s (236kB/s-827kB/s), io=20.0MiB (20.0MB), run=8879-9567msec WRITE: bw=2997KiB/s (3069kB/s), 577KiB/s-1152KiB/s (590kB/s-1180kB/s), io=28.0MiB (29.4MB), run=8879-9567msec 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=178672: Thu Jul 30 21:49:59 2026 read: IOPS=1, BW=5183KiB/s (5307kB/s)(12.0MiB/2371msec) clat (msec): min=298, max=1308, avg=743.81, stdev=515.67 lat (msec): min=298, max=1308, avg=743.81, stdev=515.67 clat percentiles (msec): | 1.00th=[ 300], 5.00th=[ 300], 10.00th=[ 300], 20.00th=[ 300], | 30.00th=[ 300], 40.00th=[ 625], 50.00th=[ 625], 60.00th=[ 625], | 70.00th=[ 1318], 80.00th=[ 1318], 90.00th=[ 1318], 95.00th=[ 1318], | 99.00th=[ 1318], 99.50th=[ 1318], 99.90th=[ 1318], 99.95th=[ 1318], | 99.99th=[ 1318] bw ( KiB/s): min= 8078, max= 8159, per=100.00%, avg=8118.50, stdev=57.28, 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=0.04%, sys=4.22%, ctx=52, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178673: Thu Jul 30 21:49:59 2026 read: IOPS=0, BW=1837KiB/s (1881kB/s)(4096KiB/2230msec) clat (nsec): min=818392k, max=818392k, avg=818391749.00, stdev= 0.00 lat (nsec): min=818394k, max=818394k, avg=818394088.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 818], 5.00th=[ 818], 10.00th=[ 818], 20.00th=[ 818], | 30.00th=[ 818], 40.00th=[ 818], 50.00th=[ 818], 60.00th=[ 818], | 70.00th=[ 818], 80.00th=[ 818], 90.00th=[ 818], 95.00th=[ 818], | 99.00th=[ 818], 99.50th=[ 818], 99.90th=[ 818], 99.95th=[ 818], | 99.99th=[ 818] bw ( KiB/s): min= 8110, max= 8110, per=100.00%, avg=8110.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3674KiB/s (3762kB/s)(8192KiB/2230msec); 0 zone resets clat (msec): min=611, max=720, avg=665.99, stdev=77.31 lat (msec): min=611, max=724, avg=668.07, stdev=79.65 clat percentiles (msec): | 1.00th=[ 609], 5.00th=[ 609], 10.00th=[ 609], 20.00th=[ 609], | 30.00th=[ 609], 40.00th=[ 609], 50.00th=[ 609], 60.00th=[ 718], | 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= 8143, max= 8143, per=91.21%, avg=8143.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=2.96%, ctx=39, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178674: Thu Jul 30 21:49:59 2026 write: IOPS=0, BW=3348KiB/s (3429kB/s)(12.0MiB/3670msec); 0 zone resets clat (msec): min=1045, max=1487, avg=1206.36, stdev=244.22 lat (msec): min=1045, max=1489, avg=1207.35, stdev=245.34 clat percentiles (msec): | 1.00th=[ 1045], 5.00th=[ 1045], 10.00th=[ 1045], 20.00th=[ 1045], | 30.00th=[ 1045], 40.00th=[ 1083], 50.00th=[ 1083], 60.00th=[ 1083], | 70.00th=[ 1485], 80.00th=[ 1485], 90.00th=[ 1485], 95.00th=[ 1485], | 99.00th=[ 1485], 99.50th=[ 1485], 99.90th=[ 1485], 99.95th=[ 1485], | 99.99th=[ 1485] bw ( KiB/s): min= 8047, max= 8143, per=90.67%, avg=8095.00, stdev=67.88, 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=2.64%, ctx=41, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=178675: Thu Jul 30 21:49:59 2026 write: IOPS=1, BW=5213KiB/s (5339kB/s)(12.0MiB/2357msec); 0 zone resets clat (msec): min=586, max=947, avg=746.80, stdev=183.55 lat (msec): min=633, max=947, avg=762.66, stdev=164.37 clat percentiles (msec): | 1.00th=[ 584], 5.00th=[ 584], 10.00th=[ 584], 20.00th=[ 584], | 30.00th=[ 584], 40.00th=[ 709], 50.00th=[ 709], 60.00th=[ 709], | 70.00th=[ 944], 80.00th=[ 944], 90.00th=[ 944], 95.00th=[ 944], | 99.00th=[ 944], 99.50th=[ 944], 99.90th=[ 944], 99.95th=[ 944], | 99.99th=[ 944] bw ( KiB/s): min= 8110, max= 8143, per=91.02%, avg=8126.50, stdev=23.33, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=4.03%, 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 Run status group 0 (all jobs): READ: bw=6910KiB/s (7076kB/s), 1837KiB/s-5183KiB/s (1881kB/s-5307kB/s), io=16.0MiB (16.8MB), run=2230-2371msec WRITE: bw=8929KiB/s (9143kB/s), 3348KiB/s-5213KiB/s (3429kB/s-5339kB/s), io=32.0MiB (33.6MB), run=2230-3670msec rand-rw: (groupid=0, jobs=1): err= 0: pid=178677: Thu Jul 30 21:50:01 2026 read: IOPS=0, BW=3135KiB/s (3211kB/s)(12.0MiB/3919msec) clat (msec): min=1280, max=1335, avg=1304.97, stdev=28.20 lat (msec): min=1280, max=1335, avg=1304.97, stdev=28.20 clat percentiles (msec): | 1.00th=[ 1284], 5.00th=[ 1284], 10.00th=[ 1284], 20.00th=[ 1284], | 30.00th=[ 1284], 40.00th=[ 1301], 50.00th=[ 1301], 60.00th=[ 1301], | 70.00th=[ 1334], 80.00th=[ 1334], 90.00th=[ 1334], 95.00th=[ 1334], | 99.00th=[ 1334], 99.50th=[ 1334], 99.90th=[ 1334], 99.95th=[ 1334], | 99.99th=[ 1334] bw ( KiB/s): min= 7922, max= 8047, per=100.00%, avg=7984.50, stdev=88.39, 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=6.87%, ctx=201, 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=178678: Thu Jul 30 21:50:01 2026 read: IOPS=0, BW=967KiB/s (991kB/s)(4096KiB/4234msec) clat (nsec): min=1370.5M, max=1370.5M, avg=1370469410.00, stdev= 0.00 lat (nsec): min=1370.5M, max=1370.5M, avg=1370470755.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1368], 5.00th=[ 1368], 10.00th=[ 1368], 20.00th=[ 1368], | 30.00th=[ 1368], 40.00th=[ 1368], 50.00th=[ 1368], 60.00th=[ 1368], | 70.00th=[ 1368], 80.00th=[ 1368], 90.00th=[ 1368], 95.00th=[ 1368], | 99.00th=[ 1368], 99.50th=[ 1368], 99.90th=[ 1368], 99.95th=[ 1368], | 99.99th=[ 1368] bw ( KiB/s): min= 8047, max= 8047, per=100.00%, avg=8047.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1935KiB/s (1981kB/s)(8192KiB/4234msec); 0 zone resets clat (msec): min=1032, max=1828, avg=1430.38, stdev=563.13 lat (msec): min=1032, max=1829, avg=1431.00, stdev=562.87 clat percentiles (msec): | 1.00th=[ 1036], 5.00th=[ 1036], 10.00th=[ 1036], 20.00th=[ 1036], | 30.00th=[ 1036], 40.00th=[ 1036], 50.00th=[ 1036], 60.00th=[ 1821], | 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= 7922, max= 7922, per=100.00%, avg=7922.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 2000=100.00% cpu : usr=0.09%, sys=2.53%, ctx=78, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=178679: Thu Jul 30 21:50:01 2026 write: IOPS=0, BW=2884KiB/s (2953kB/s)(12.0MiB/4261msec); 0 zone resets clat (msec): min=487, max=2108, avg=1417.17, stdev=836.52 lat (msec): min=491, max=2109, avg=1418.74, stdev=834.37 clat percentiles (msec): | 1.00th=[ 489], 5.00th=[ 489], 10.00th=[ 489], 20.00th=[ 489], | 30.00th=[ 489], 40.00th=[ 1653], 50.00th=[ 1653], 60.00th=[ 1653], | 70.00th=[ 2106], 80.00th=[ 2106], 90.00th=[ 2106], 95.00th=[ 2106], | 99.00th=[ 2106], 99.50th=[ 2106], 99.90th=[ 2106], 99.95th=[ 2106], | 99.99th=[ 2106] bw ( KiB/s): min= 7831, max= 8126, per=100.00%, avg=7978.50, stdev=208.60, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.23%, 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=178680: Thu Jul 30 21:50:01 2026 write: IOPS=0, BW=3677KiB/s (3765kB/s)(12.0MiB/3342msec); 0 zone resets clat (msec): min=460, max=1628, avg=1109.77, stdev=594.90 lat (msec): min=469, max=1630, avg=1113.56, stdev=591.20 clat percentiles (msec): | 1.00th=[ 460], 5.00th=[ 460], 10.00th=[ 460], 20.00th=[ 460], | 30.00th=[ 460], 40.00th=[ 1234], 50.00th=[ 1234], 60.00th=[ 1234], | 70.00th=[ 1636], 80.00th=[ 1636], 90.00th=[ 1636], 95.00th=[ 1636], | 99.00th=[ 1636], 99.50th=[ 1636], 99.90th=[ 1636], 99.95th=[ 1636], | 99.99th=[ 1636] bw ( KiB/s): min= 7327, max= 7831, per=98.56%, avg=7579.00, stdev=356.38, 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=3.71%, ctx=50, 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=3870KiB/s (3962kB/s), 967KiB/s-3135KiB/s (991kB/s-3211kB/s), io=16.0MiB (16.8MB), run=3919-4234msec WRITE: bw=7690KiB/s (7875kB/s), 1935KiB/s-3677KiB/s (1981kB/s-3765kB/s), io=32.0MiB (33.6MB), run=3342-4261msec