== sanity test 398b: DIO and buffer IO race ============== 10:14:54 (1786803294) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 5.76402 s, 8.7 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=146712: Sat Aug 15 10:17:12 2026 read: IOPS=12, BW=50.3KiB/s (51.5kB/s)(5992KiB/119040msec) clat (usec): min=30, max=784263, avg=38502.36, stdev=33354.66 lat (usec): min=30, max=784264, avg=38505.69, stdev=33356.44 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 60], 10.00th=[ 9896], 20.00th=[ 18744], | 30.00th=[ 23987], 40.00th=[ 28443], 50.00th=[ 33162], 60.00th=[ 39060], | 70.00th=[ 45876], 80.00th=[ 55313], 90.00th=[ 69731], 95.00th=[ 84411], | 99.00th=[132645], 99.50th=[154141], 99.90th=[333448], 99.95th=[784335], | 99.99th=[784335] bw ( KiB/s): min= 6, max= 125, per=25.08%, avg=49.91, stdev=20.95, samples=235 iops : min= 1, max= 31, avg=11.86, stdev= 5.28, samples=235 write: IOPS=13, BW=52.9KiB/s (54.2kB/s)(6296KiB/119040msec); 0 zone resets clat (usec): min=1145, max=443565, avg=38883.86, stdev=40865.60 lat (usec): min=1145, max=443566, avg=38888.05, stdev=40865.73 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1516], 10.00th=[ 2540], 20.00th=[ 5473], | 30.00th=[ 9634], 40.00th=[ 18220], 50.00th=[ 28181], 60.00th=[ 38011], | 70.00th=[ 49021], 80.00th=[ 65274], 90.00th=[ 91751], 95.00th=[113771], | 99.00th=[179307], 99.50th=[210764], 99.90th=[337642], 99.95th=[442500], | 99.99th=[442500] bw ( KiB/s): min= 7, max= 119, per=25.21%, avg=52.69, stdev=20.31, samples=234 iops : min= 1, max= 29, avg=12.54, stdev= 5.13, samples=234 lat (usec) : 50=0.75%, 100=3.16%, 250=0.42%, 500=0.10%, 1000=0.07% lat (msec) : 2=3.71%, 4=4.20%, 10=8.20%, 20=11.17%, 50=41.08% lat (msec) : 100=21.91%, 250=5.08%, 500=0.13%, 1000=0.03% cpu : usr=0.09%, sys=6.06%, ctx=6797, 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=146713: Sat Aug 15 10:17:12 2026 read: IOPS=12, BW=49.4KiB/s (50.6kB/s)(5940KiB/120132msec) clat (usec): min=28, max=935197, avg=39687.38, stdev=36852.45 lat (usec): min=29, max=935199, avg=39688.89, stdev=36852.45 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 61], 10.00th=[ 7570], 20.00th=[ 18744], | 30.00th=[ 23200], 40.00th=[ 28443], 50.00th=[ 33424], 60.00th=[ 40633], | 70.00th=[ 48497], 80.00th=[ 57934], 90.00th=[ 73925], 95.00th=[ 88605], | 99.00th=[131597], 99.50th=[168821], 99.90th=[291505], 99.95th=[935330], | 99.99th=[935330] bw ( KiB/s): min= 7, max= 103, per=24.90%, avg=49.54, stdev=20.39, samples=234 iops : min= 1, max= 25, avg=11.76, stdev= 5.13, samples=234 write: IOPS=13, BW=52.8KiB/s (54.1kB/s)(6348KiB/120132msec); 0 zone resets clat (usec): min=1103, max=354735, avg=38442.87, stdev=41592.96 lat (usec): min=1103, max=354736, avg=38447.53, stdev=41592.46 clat percentiles (usec): | 1.00th=[ 1237], 5.00th=[ 1385], 10.00th=[ 2089], 20.00th=[ 4555], | 30.00th=[ 8586], 40.00th=[ 17695], 50.00th=[ 26870], 60.00th=[ 36963], | 70.00th=[ 49546], 80.00th=[ 63701], 90.00th=[ 87557], 95.00th=[120062], | 99.00th=[185598], 99.50th=[250610], 99.90th=[287310], 99.95th=[354419], | 99.99th=[354419] bw ( KiB/s): min= 7, max= 126, per=25.09%, avg=52.44, stdev=22.56, samples=236 iops : min= 1, max= 31, avg=12.48, stdev= 5.67, samples=236 lat (usec) : 50=0.81%, 100=3.06%, 250=0.59%, 500=0.10%, 750=0.07% lat (usec) : 1000=0.07% lat (msec) : 2=4.98%, 4=4.30%, 10=7.55%, 20=11.46%, 50=38.09% lat (msec) : 100=23.54%, 250=5.05%, 500=0.33%, 1000=0.03% cpu : usr=0.08%, sys=6.03%, ctx=6702, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146714: Sat Aug 15 10:17:12 2026 read: IOPS=12, BW=51.1KiB/s (52.3kB/s)(6028KiB/117920msec) clat (usec): min=30, max=930986, avg=38041.96, stdev=35688.47 lat (usec): min=30, max=930988, avg=38044.91, stdev=35687.70 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 60], 10.00th=[ 7504], 20.00th=[ 18744], | 30.00th=[ 23200], 40.00th=[ 27657], 50.00th=[ 32637], 60.00th=[ 38011], | 70.00th=[ 45351], 80.00th=[ 54789], 90.00th=[ 69731], 95.00th=[ 83362], | 99.00th=[132645], 99.50th=[149947], 99.90th=[337642], 99.95th=[926942], | 99.99th=[926942] bw ( KiB/s): min= 7, max= 111, per=25.64%, avg=51.03, stdev=21.48, samples=231 iops : min= 1, max= 27, avg=12.14, stdev= 5.42, samples=231 write: IOPS=13, BW=53.1KiB/s (54.4kB/s)(6260KiB/117920msec); 0 zone resets clat (usec): min=1031, max=411827, avg=38620.05, stdev=39334.34 lat (usec): min=1032, max=411830, avg=38623.95, stdev=39336.15 clat percentiles (usec): | 1.00th=[ 1221], 5.00th=[ 1565], 10.00th=[ 2376], 20.00th=[ 5407], | 30.00th=[ 10028], 40.00th=[ 20055], 50.00th=[ 29492], 60.00th=[ 38536], | 70.00th=[ 50070], 80.00th=[ 65274], 90.00th=[ 86508], 95.00th=[109577], | 99.00th=[175113], 99.50th=[198181], 99.90th=[396362], 99.95th=[413139], | 99.99th=[413139] bw ( KiB/s): min= 7, max= 112, per=25.16%, avg=52.58, stdev=21.17, samples=233 iops : min= 1, max= 28, avg=12.52, stdev= 5.33, samples=233 lat (usec) : 50=0.75%, 100=3.19%, 250=0.46%, 500=0.16%, 750=0.03% lat (usec) : 1000=0.07% lat (msec) : 2=3.94%, 4=4.69%, 10=7.10%, 20=10.81%, 50=41.60% lat (msec) : 100=22.75%, 250=4.33%, 500=0.10%, 1000=0.03% cpu : usr=0.08%, sys=6.15%, ctx=6804, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146715: Sat Aug 15 10:17:12 2026 read: IOPS=12, BW=50.4KiB/s (51.6kB/s)(6052KiB/120047msec) clat (usec): min=33, max=275829, avg=38418.44, stdev=28235.82 lat (usec): min=33, max=275831, avg=38428.27, stdev=28264.10 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 62], 10.00th=[ 8717], 20.00th=[ 18482], | 30.00th=[ 23200], 40.00th=[ 27657], 50.00th=[ 33424], 60.00th=[ 39060], | 70.00th=[ 46924], 80.00th=[ 56361], 90.00th=[ 70779], 95.00th=[ 92799], | 99.00th=[126354], 99.50th=[160433], 99.90th=[261096], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 7, max= 143, per=25.95%, avg=51.63, stdev=20.68, samples=229 iops : min= 1, max= 35, avg=12.28, stdev= 5.22, samples=229 write: IOPS=12, BW=51.9KiB/s (53.2kB/s)(6236KiB/120047msec); 0 zone resets clat (usec): min=1085, max=1146.1k, avg=39592.51, stdev=49924.60 lat (usec): min=1086, max=1146.1k, avg=39595.83, stdev=49924.55 clat percentiles (usec): | 1.00th=[ 1254], 5.00th=[ 1450], 10.00th=[ 2180], | 20.00th=[ 4752], 30.00th=[ 9503], 40.00th=[ 18482], | 50.00th=[ 27919], 60.00th=[ 38536], 70.00th=[ 48497], | 80.00th=[ 66847], 90.00th=[ 89654], 95.00th=[ 115868], | 99.00th=[ 162530], 99.50th=[ 219153], 99.90th=[ 505414], | 99.95th=[1149240], 99.99th=[1149240] bw ( KiB/s): min= 7, max= 142, per=24.79%, avg=51.81, stdev=21.11, samples=235 iops : min= 1, max= 35, avg=12.32, stdev= 5.33, samples=235 lat (usec) : 50=0.46%, 100=3.71%, 250=0.49%, 500=0.03%, 750=0.03% lat (usec) : 1000=0.03% lat (msec) : 2=4.46%, 4=4.26%, 10=7.03%, 20=11.69%, 50=40.14% lat (msec) : 100=21.88%, 250=5.50%, 500=0.23%, 750=0.03%, 2000=0.03% cpu : usr=0.08%, sys=6.01%, ctx=6738, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=200KiB/s (205kB/s), 49.4KiB/s-51.1KiB/s (50.6kB/s-52.3kB/s), io=23.4MiB (24.6MB), run=117920-120132msec WRITE: bw=209KiB/s (214kB/s), 51.9KiB/s-53.1KiB/s (53.2kB/s-54.4kB/s), io=24.6MiB (25.7MB), run=117920-120132msec fio: pid=146709, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=146707: Sat Aug 15 10:19:39 2026 read: IOPS=5, BW=22.5KiB/s (23.0kB/s)(5992KiB/266392msec) clat (msec): min=6, max=815, avg=39.59, stdev=40.23 lat (msec): min=6, max=815, avg=39.59, stdev=40.23 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 25], 50.00th=[ 29], 60.00th=[ 36], | 70.00th=[ 44], 80.00th=[ 55], 90.00th=[ 75], 95.00th=[ 100], | 99.00th=[ 184], 99.50th=[ 226], 99.90th=[ 468], 99.95th=[ 818], | 99.99th=[ 818] bw ( KiB/s): min= 7, max= 96, per=29.16%, avg=24.49, stdev=16.35, samples=473 iops : min= 1, max= 24, avg= 5.50, stdev= 4.11, samples=473 write: IOPS=5, BW=23.6KiB/s (24.2kB/s)(6296KiB/266392msec); 0 zone resets clat (msec): min=37, max=548, avg=131.30, stdev=64.26 lat (msec): min=37, max=548, avg=131.30, stdev=64.26 clat percentiles (msec): | 1.00th=[ 49], 5.00th=[ 61], 10.00th=[ 70], 20.00th=[ 82], | 30.00th=[ 92], 40.00th=[ 105], 50.00th=[ 117], 60.00th=[ 130], | 70.00th=[ 146], 80.00th=[ 169], 90.00th=[ 215], 95.00th=[ 255], | 99.00th=[ 359], 99.50th=[ 418], 99.90th=[ 502], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 7, max= 55, per=26.08%, avg=23.21, stdev=10.47, samples=523 iops : min= 1, max= 13, avg= 5.17, stdev= 2.67, samples=523 lat (msec) : 10=2.47%, 20=11.82%, 50=23.31%, 100=27.41%, 250=32.00% lat (msec) : 500=2.90%, 750=0.07%, 1000=0.03% cpu : usr=0.04%, sys=1.60%, ctx=5884, 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=146708: Sat Aug 15 10:19:39 2026 read: IOPS=5, BW=22.2KiB/s (22.7kB/s)(5940KiB/267619msec) clat (msec): min=5, max=943, avg=39.96, stdev=42.45 lat (msec): min=5, max=943, avg=39.96, stdev=42.45 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 36], | 70.00th=[ 43], 80.00th=[ 53], 90.00th=[ 74], 95.00th=[ 96], | 99.00th=[ 203], 99.50th=[ 253], 99.90th=[ 409], 99.95th=[ 944], | 99.99th=[ 944] bw ( KiB/s): min= 7, max= 102, per=29.57%, avg=24.84, stdev=16.51, samples=462 iops : min= 1, max= 25, avg= 5.62, stdev= 4.20, samples=462 write: IOPS=5, BW=23.7KiB/s (24.3kB/s)(6348KiB/267619msec); 0 zone resets clat (msec): min=34, max=544, avg=130.98, stdev=65.01 lat (msec): min=34, max=544, avg=130.98, stdev=65.01 clat percentiles (msec): | 1.00th=[ 47], 5.00th=[ 59], 10.00th=[ 68], 20.00th=[ 82], | 30.00th=[ 92], 40.00th=[ 104], 50.00th=[ 114], 60.00th=[ 130], | 70.00th=[ 148], 80.00th=[ 169], 90.00th=[ 218], 95.00th=[ 264], | 99.00th=[ 351], 99.50th=[ 401], 99.90th=[ 535], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 7, max= 56, per=26.18%, avg=23.30, stdev=10.66, samples=524 iops : min= 1, max= 14, avg= 5.21, stdev= 2.73, samples=524 lat (msec) : 10=2.28%, 20=11.82%, 50=24.06%, 100=27.05%, 250=31.28% lat (msec) : 500=3.42%, 750=0.07%, 1000=0.03% cpu : usr=0.05%, sys=1.63%, ctx=5871, 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= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=146709: Sat Aug 15 10:19:39 2026 read: IOPS=5, BW=20.0KiB/s (21.5kB/s)(4736KiB/225924msec) clat (msec): min=6, max=445, avg=41.42, stdev=37.41 lat (msec): min=6, max=445, avg=41.42, stdev=37.41 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 27], 50.00th=[ 33], 60.00th=[ 39], | 70.00th=[ 47], 80.00th=[ 57], 90.00th=[ 75], 95.00th=[ 102], | 99.00th=[ 176], 99.50th=[ 309], 99.90th=[ 368], 99.95th=[ 447], | 99.99th=[ 447] bw ( KiB/s): min= 7, max= 111, per=27.67%, avg=23.24, stdev=15.44, samples=392 iops : min= 1, max= 27, avg= 5.17, stdev= 3.89, samples=392 write: IOPS=5, BW=21.9KiB/s (22.4kB/s)(4952KiB/225924msec); 0 zone resets clat (msec): min=40, max=1035, avg=142.52, stdev=72.28 lat (msec): min=40, max=1035, avg=142.52, stdev=72.28 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 61], 10.00th=[ 71], 20.00th=[ 87], | 30.00th=[ 101], 40.00th=[ 114], 50.00th=[ 126], 60.00th=[ 142], | 70.00th=[ 161], 80.00th=[ 190], 90.00th=[ 239], 95.00th=[ 271], | 99.00th=[ 368], 99.50th=[ 401], 99.90th=[ 493], 99.95th=[ 1036], | 99.99th=[ 1036] bw ( KiB/s): min= 7, max= 56, per=24.28%, avg=21.61, stdev=10.18, samples=440 iops : min= 1, max= 14, avg= 4.76, stdev= 2.61, samples=440 lat (msec) : 10=2.31%, 20=10.69%, 50=23.40%, 100=25.22%, 250=34.09% lat (msec) : 500=4.21%, 2000=0.04% cpu : usr=0.04%, sys=1.53%, ctx=4401, 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=1185,1238,0,0 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=146710: Sat Aug 15 10:19:39 2026 read: IOPS=5, BW=22.8KiB/s (23.3kB/s)(6052KiB/265798msec) clat (msec): min=5, max=479, avg=38.54, stdev=33.03 lat (msec): min=5, max=479, avg=38.55, stdev=33.03 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 36], | 70.00th=[ 43], 80.00th=[ 53], 90.00th=[ 72], 95.00th=[ 97], | 99.00th=[ 169], 99.50th=[ 201], 99.90th=[ 275], 99.95th=[ 481], | 99.99th=[ 481] bw ( KiB/s): min= 7, max= 96, per=29.77%, avg=25.01, stdev=17.03, samples=468 iops : min= 1, max= 24, avg= 5.64, stdev= 4.29, samples=468 write: IOPS=5, BW=23.5KiB/s (24.0kB/s)(6236KiB/265798msec); 0 zone resets clat (msec): min=35, max=1149, avg=132.79, stdev=66.38 lat (msec): min=35, max=1149, avg=132.79, stdev=66.38 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 62], 10.00th=[ 71], 20.00th=[ 83], | 30.00th=[ 93], 40.00th=[ 106], 50.00th=[ 117], 60.00th=[ 133], | 70.00th=[ 153], 80.00th=[ 176], 90.00th=[ 218], 95.00th=[ 259], | 99.00th=[ 334], 99.50th=[ 359], 99.90th=[ 468], 99.95th=[ 1150], | 99.99th=[ 1150] bw ( KiB/s): min= 7, max= 56, per=25.87%, avg=23.03, stdev= 9.98, samples=522 iops : min= 1, max= 14, avg= 5.15, stdev= 2.58, samples=522 lat (msec) : 10=2.31%, 20=11.78%, 50=25.07%, 100=26.01%, 250=31.77% lat (msec) : 500=3.03%, 2000=0.03% cpu : usr=0.04%, sys=1.64%, ctx=5801, 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=84.9KiB/s (86.9kB/s), 20.0KiB/s-22.8KiB/s (21.5kB/s-23.3kB/s), io=22.2MiB (23.3MB), run=225924-267619msec WRITE: bw=89.1KiB/s (91.2kB/s), 21.9KiB/s-23.7KiB/s (22.4kB/s-24.3kB/s), io=23.3MiB (24.4MB), run=225924-267619msec 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=146773: Sat Aug 15 10:20:19 2026 read: IOPS=12, BW=197KiB/s (201kB/s)(5920KiB/30122msec) clat (usec): min=38, max=240673, avg=39107.34, stdev=34957.47 lat (usec): min=38, max=240675, avg=39110.78, stdev=34959.98 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 51], 10.00th=[ 59], 20.00th=[ 79], | 30.00th=[ 19268], 40.00th=[ 29492], 50.00th=[ 36963], 60.00th=[ 43254], | 70.00th=[ 49546], 80.00th=[ 64750], 90.00th=[ 84411], 95.00th=[101188], | 99.00th=[145753], 99.50th=[185598], 99.90th=[240124], 99.95th=[240124], | 99.99th=[240124] bw ( KiB/s): min= 31, max= 384, per=26.43%, avg=200.57, stdev=78.96, samples=58 iops : min= 1, max= 24, avg=11.78, stdev= 5.06, samples=58 write: IOPS=13, BW=211KiB/s (216kB/s)(6368KiB/30122msec); 0 zone resets clat (usec): min=1554, max=291920, avg=39023.18, stdev=44411.51 lat (usec): min=1555, max=291922, avg=39027.50, stdev=44412.29 clat percentiles (usec): | 1.00th=[ 1713], 5.00th=[ 2008], 10.00th=[ 2802], 20.00th=[ 4883], | 30.00th=[ 8356], 40.00th=[ 12911], 50.00th=[ 22938], 60.00th=[ 34341], | 70.00th=[ 47973], 80.00th=[ 66323], 90.00th=[100140], 95.00th=[125305], | 99.00th=[196084], 99.50th=[274727], 99.90th=[291505], 99.95th=[291505], | 99.99th=[291505] bw ( KiB/s): min= 29, max= 477, per=26.50%, avg=211.75, stdev=87.22, samples=59 iops : min= 1, max= 29, avg=12.47, stdev= 5.48, samples=59 lat (usec) : 50=2.08%, 100=9.24%, 250=1.17%, 500=0.13%, 1000=0.13% lat (msec) : 2=2.47%, 4=6.51%, 10=9.90%, 20=8.07%, 50=30.99% lat (msec) : 100=21.48%, 250=7.55%, 500=0.26% cpu : usr=0.07%, sys=5.96%, ctx=1449, 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=146774: Sat Aug 15 10:20:19 2026 read: IOPS=11, BW=189KiB/s (194kB/s)(5744KiB/30395msec) clat (usec): min=39, max=199130, avg=38706.77, stdev=31852.78 lat (usec): min=39, max=199132, avg=38707.95, stdev=31852.79 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 57], 10.00th=[ 62], 20.00th=[ 85], | 30.00th=[ 22152], 40.00th=[ 30016], 50.00th=[ 37487], 60.00th=[ 44303], | 70.00th=[ 53740], 80.00th=[ 64226], 90.00th=[ 80217], 95.00th=[ 88605], | 99.00th=[129500], 99.50th=[162530], 99.90th=[198181], 99.95th=[198181], | 99.99th=[198181] bw ( KiB/s): min= 29, max= 415, per=25.32%, avg=192.19, stdev=88.52, samples=59 iops : min= 1, max= 25, avg=11.25, stdev= 5.58, samples=59 write: IOPS=13, BW=215KiB/s (220kB/s)(6544KiB/30395msec); 0 zone resets clat (usec): min=1536, max=333190, avg=39428.36, stdev=45265.64 lat (usec): min=1538, max=333192, avg=39430.38, stdev=45265.68 clat percentiles (usec): | 1.00th=[ 1631], 5.00th=[ 1844], 10.00th=[ 3064], 20.00th=[ 5669], | 30.00th=[ 8455], 40.00th=[ 14091], 50.00th=[ 22152], 60.00th=[ 34341], | 70.00th=[ 45351], 80.00th=[ 68682], 90.00th=[101188], 95.00th=[135267], | 99.00th=[200279], 99.50th=[206570], 99.90th=[333448], 99.95th=[333448], | 99.99th=[333448] bw ( KiB/s): min= 58, max= 496, per=26.90%, avg=214.92, stdev=101.67, samples=60 iops : min= 3, max= 31, avg=12.68, stdev= 6.45, samples=60 lat (usec) : 50=0.91%, 100=9.38%, 250=1.17%, 500=0.26%, 750=0.13% lat (msec) : 2=3.39%, 4=4.17%, 10=9.51%, 20=10.16%, 50=30.73% lat (msec) : 100=23.31%, 250=6.77%, 500=0.13% cpu : usr=0.09%, sys=6.27%, ctx=1483, 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=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=146775: Sat Aug 15 10:20:19 2026 read: IOPS=12, BW=202KiB/s (207kB/s)(6256KiB/30971msec) clat (usec): min=29, max=232868, avg=42085.87, stdev=37480.99 lat (usec): min=29, max=232870, avg=42087.31, stdev=37481.00 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 58], 10.00th=[ 63], 20.00th=[ 115], | 30.00th=[ 22152], 40.00th=[ 29230], 50.00th=[ 36439], 60.00th=[ 44303], | 70.00th=[ 54264], 80.00th=[ 68682], 90.00th=[ 87557], 95.00th=[102237], | 99.00th=[183501], 99.50th=[196084], 99.90th=[233833], 99.95th=[233833], | 99.99th=[233833] bw ( KiB/s): min= 62, max= 416, per=27.14%, avg=205.98, stdev=79.53, samples=60 iops : min= 3, max= 26, avg=12.12, stdev= 5.05, samples=60 write: IOPS=12, BW=195KiB/s (199kB/s)(6032KiB/30971msec); 0 zone resets clat (usec): min=1495, max=222924, avg=37587.60, stdev=39661.96 lat (usec): min=1496, max=222926, avg=37591.87, stdev=39662.01 clat percentiles (usec): | 1.00th=[ 1663], 5.00th=[ 1926], 10.00th=[ 2900], 20.00th=[ 6063], | 30.00th=[ 10028], 40.00th=[ 15008], 50.00th=[ 25297], 60.00th=[ 35914], | 70.00th=[ 45876], 80.00th=[ 61604], 90.00th=[ 95945], 95.00th=[115868], | 99.00th=[200279], 99.50th=[210764], 99.90th=[223347], 99.95th=[223347], | 99.99th=[223347] bw ( KiB/s): min= 31, max= 536, per=24.18%, avg=193.20, stdev=91.66, samples=61 iops : min= 1, max= 33, avg=11.31, stdev= 5.75, samples=61 lat (usec) : 50=1.04%, 100=8.72%, 250=1.30%, 500=0.13%, 1000=0.13% lat (msec) : 2=2.47%, 4=4.04%, 10=8.72%, 20=10.42%, 50=32.68% lat (msec) : 100=23.57%, 250=6.77% cpu : usr=0.08%, sys=5.99%, ctx=1571, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146776: Sat Aug 15 10:20:19 2026 read: IOPS=11, BW=191KiB/s (196kB/s)(6032KiB/31522msec) clat (usec): min=39, max=216283, avg=41989.56, stdev=34140.57 lat (usec): min=40, max=216285, avg=41990.75, stdev=34140.61 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 56], 10.00th=[ 61], 20.00th=[ 145], | 30.00th=[ 23462], 40.00th=[ 32375], 50.00th=[ 41157], 60.00th=[ 47973], | 70.00th=[ 55313], 80.00th=[ 65274], 90.00th=[ 83362], 95.00th=[ 96994], | 99.00th=[158335], 99.50th=[168821], 99.90th=[217056], 99.95th=[217056], | 99.99th=[217056] bw ( KiB/s): min= 63, max= 479, per=25.83%, avg=196.02, stdev=82.44, samples=60 iops : min= 3, max= 29, avg=11.48, stdev= 5.24, samples=60 write: IOPS=12, BW=198KiB/s (203kB/s)(6256KiB/31522msec); 0 zone resets clat (usec): min=1409, max=415284, avg=39129.66, stdev=47576.15 lat (usec): min=1411, max=415286, avg=39132.24, stdev=47576.14 clat percentiles (usec): | 1.00th=[ 1565], 5.00th=[ 1860], 10.00th=[ 2606], 20.00th=[ 5211], | 30.00th=[ 8291], 40.00th=[ 13960], 50.00th=[ 21627], 60.00th=[ 34866], | 70.00th=[ 47973], 80.00th=[ 65274], 90.00th=[ 92799], 95.00th=[127402], | 99.00th=[208667], 99.50th=[333448], 99.90th=[417334], 99.95th=[417334], | 99.99th=[417334] bw ( KiB/s): min= 31, max= 589, per=24.80%, avg=198.16, stdev=91.04, samples=62 iops : min= 1, max= 36, avg=11.61, stdev= 5.76, samples=62 lat (usec) : 50=1.04%, 100=7.94%, 250=1.43%, 500=0.39%, 750=0.13% lat (msec) : 2=3.39%, 4=4.82%, 10=9.51%, 20=9.11%, 50=29.30% lat (msec) : 100=26.17%, 250=6.51%, 500=0.26% cpu : usr=0.04%, sys=5.73%, ctx=1510, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=760KiB/s (778kB/s), 189KiB/s-202KiB/s (194kB/s-207kB/s), io=23.4MiB (24.5MB), run=30122-31522msec WRITE: bw=799KiB/s (819kB/s), 195KiB/s-215KiB/s (199kB/s-220kB/s), io=24.6MiB (25.8MB), run=30122-31522msec fio: pid=146771, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=146768: Sat Aug 15 10:20:59 2026 read: IOPS=5, BW=83.6KiB/s (85.6kB/s)(5920KiB/70824msec) clat (msec): min=7, max=338, avg=38.18, stdev=37.31 lat (msec): min=7, max=338, avg=38.18, stdev=37.31 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 29], | 70.00th=[ 39], 80.00th=[ 53], 90.00th=[ 86], 95.00th=[ 117], | 99.00th=[ 171], 99.50th=[ 230], 99.90th=[ 338], 99.95th=[ 338], | 99.99th=[ 338] bw ( KiB/s): min= 31, max= 320, per=30.55%, avg=91.03, stdev=62.27, samples=128 iops : min= 1, max= 20, avg= 4.95, stdev= 3.94, samples=128 write: IOPS=5, BW=89.9KiB/s (92.1kB/s)(6368KiB/70824msec); 0 zone resets clat (msec): min=39, max=563, avg=142.03, stdev=71.82 lat (msec): min=39, max=563, avg=142.04, stdev=71.82 clat percentiles (msec): | 1.00th=[ 51], 5.00th=[ 61], 10.00th=[ 69], 20.00th=[ 82], | 30.00th=[ 95], 40.00th=[ 110], 50.00th=[ 126], 60.00th=[ 144], | 70.00th=[ 169], 80.00th=[ 194], 90.00th=[ 232], 95.00th=[ 279], | 99.00th=[ 388], 99.50th=[ 443], 99.90th=[ 567], 99.95th=[ 567], | 99.99th=[ 567] bw ( KiB/s): min= 31, max= 192, per=29.01%, avg=90.79, stdev=44.80, samples=138 iops : min= 1, max= 12, avg= 4.93, stdev= 2.90, samples=138 lat (msec) : 10=1.82%, 20=15.76%, 50=20.83%, 100=24.48%, 250=33.59% lat (msec) : 500=3.39%, 750=0.13% cpu : usr=0.04%, sys=1.38%, ctx=1390, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146769: Sat Aug 15 10:20:59 2026 read: IOPS=4, BW=79.0KiB/s (81.9kB/s)(5744KiB/71831msec) clat (msec): min=6, max=262, avg=39.33, stdev=43.87 lat (msec): min=6, max=262, avg=39.33, stdev=43.87 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 28], | 70.00th=[ 36], 80.00th=[ 50], 90.00th=[ 87], 95.00th=[ 140], | 99.00th=[ 257], 99.50th=[ 259], 99.90th=[ 264], 99.95th=[ 264], | 99.99th=[ 264] bw ( KiB/s): min= 31, max= 352, per=32.21%, avg=95.99, stdev=65.73, samples=117 iops : min= 1, max= 22, avg= 5.29, stdev= 4.16, samples=117 write: IOPS=5, BW=91.1KiB/s (93.3kB/s)(6544KiB/71831msec); 0 zone resets clat (msec): min=43, max=409, avg=140.60, stdev=71.59 lat (msec): min=43, max=409, avg=140.61, stdev=71.59 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 61], 10.00th=[ 70], 20.00th=[ 82], | 30.00th=[ 92], 40.00th=[ 103], 50.00th=[ 124], 60.00th=[ 144], | 70.00th=[ 165], 80.00th=[ 194], 90.00th=[ 245], 95.00th=[ 292], | 99.00th=[ 372], 99.50th=[ 405], 99.90th=[ 409], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 30, max= 223, per=29.46%, avg=92.22, stdev=46.35, samples=139 iops : min= 1, max= 13, avg= 5.03, stdev= 2.98, samples=139 lat (msec) : 10=2.34%, 20=17.58%, 50=18.36%, 100=25.39%, 250=30.99% lat (msec) : 500=5.34% cpu : usr=0.04%, sys=1.38%, ctx=1443, 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=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=146770: Sat Aug 15 10:20:59 2026 read: IOPS=5, BW=88.3KiB/s (90.4kB/s)(6256KiB/70866msec) clat (msec): min=6, max=249, avg=37.47, stdev=37.14 lat (msec): min=6, max=249, avg=37.47, stdev=37.14 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 15], | 30.00th=[ 18], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 28], | 70.00th=[ 37], 80.00th=[ 53], 90.00th=[ 81], 95.00th=[ 116], | 99.00th=[ 182], 99.50th=[ 241], 99.90th=[ 249], 99.95th=[ 249], | 99.99th=[ 249] bw ( KiB/s): min= 30, max= 384, per=33.79%, avg=100.68, stdev=73.64, samples=123 iops : min= 1, max= 24, avg= 5.55, stdev= 4.71, samples=123 write: IOPS=5, BW=85.1KiB/s (87.2kB/s)(6032KiB/70866msec); 0 zone resets clat (msec): min=43, max=447, avg=148.55, stdev=76.40 lat (msec): min=43, max=447, avg=148.56, stdev=76.40 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 65], 10.00th=[ 72], 20.00th=[ 84], | 30.00th=[ 100], 40.00th=[ 115], 50.00th=[ 128], 60.00th=[ 148], | 70.00th=[ 174], 80.00th=[ 203], 90.00th=[ 249], 95.00th=[ 305], | 99.00th=[ 405], 99.50th=[ 439], 99.90th=[ 447], 99.95th=[ 447], | 99.99th=[ 447] bw ( KiB/s): min= 30, max= 192, per=27.39%, avg=85.73, stdev=40.81, samples=138 iops : min= 1, max= 12, avg= 4.62, stdev= 2.66, samples=138 lat (msec) : 10=2.47%, 20=17.71%, 50=20.44%, 100=21.74%, 250=33.07% lat (msec) : 500=4.56% cpu : usr=0.05%, sys=1.39%, ctx=1404, 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=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= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=146771: Sat Aug 15 10:20:59 2026 read: IOPS=4, BW=66.9KiB/s (68.5kB/s)(3504KiB/52372msec) clat (msec): min=7, max=255, avg=51.13, stdev=44.61 lat (msec): min=7, max=256, avg=51.14, stdev=44.61 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 13], 10.00th=[ 15], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 30], 50.00th=[ 36], 60.00th=[ 44], | 70.00th=[ 55], 80.00th=[ 77], 90.00th=[ 111], 95.00th=[ 163], | 99.00th=[ 220], 99.50th=[ 224], 99.90th=[ 257], 99.95th=[ 257], | 99.99th=[ 257] bw ( KiB/s): min= 30, max= 224, per=27.59%, avg=82.23, stdev=55.81, samples=82 iops : min= 1, max= 14, avg= 4.37, stdev= 3.55, samples=82 write: IOPS=4, BW=68.1KiB/s (69.8kB/s)(3568KiB/52372msec); 0 zone resets clat (msec): min=39, max=542, avg=184.25, stdev=79.83 lat (msec): min=39, max=542, avg=184.26, stdev=79.83 clat percentiles (msec): | 1.00th=[ 68], 5.00th=[ 87], 10.00th=[ 97], 20.00th=[ 115], | 30.00th=[ 133], 40.00th=[ 153], 50.00th=[ 169], 60.00th=[ 192], | 70.00th=[ 215], 80.00th=[ 247], 90.00th=[ 279], 95.00th=[ 342], | 99.00th=[ 422], 99.50th=[ 460], 99.90th=[ 542], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 30, max= 158, per=22.04%, avg=68.99, stdev=29.60, samples=100 iops : min= 1, max= 9, avg= 3.53, stdev= 1.90, samples=100 lat (msec) : 10=1.13%, 20=9.03%, 50=22.80%, 100=16.48%, 250=40.63% lat (msec) : 500=9.48%, 750=0.23% cpu : usr=0.03%, sys=1.23%, ctx=740, 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=220,223,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=298KiB/s (305kB/s), 66.9KiB/s-88.3KiB/s (68.5kB/s-90.4kB/s), io=20.9MiB (21.9MB), run=52372-71831msec WRITE: bw=313KiB/s (321kB/s), 68.1KiB/s-91.1KiB/s (69.8kB/s-93.3kB/s), io=21.0MiB (23.1MB), run=52372-71831msec 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=146797: Sat Aug 15 10:21:13 2026 read: IOPS=1, BW=1635KiB/s (1674kB/s)(7168KiB/4385msec) clat (usec): min=448, max=388595, avg=261828.32, stdev=129957.67 lat (usec): min=450, max=388597, avg=261829.83, stdev=129957.65 clat percentiles (usec): | 1.00th=[ 449], 5.00th=[ 449], 10.00th=[ 449], 20.00th=[217056], | 30.00th=[265290], 40.00th=[265290], 50.00th=[267387], 60.00th=[333448], | 70.00th=[333448], 80.00th=[358613], 90.00th=[387974], 95.00th=[387974], | 99.00th=[387974], 99.50th=[387974], 99.90th=[387974], 99.95th=[387974], | 99.99th=[387974] bw ( KiB/s): min= 1885, max= 4096, per=57.52%, avg=2380.60, stdev=960.04, samples=5 iops : min= 1, max= 4, avg= 1.60, stdev= 1.34, samples=5 write: IOPS=1, BW=1168KiB/s (1196kB/s)(5120KiB/4385msec); 0 zone resets clat (msec): min=302, max=980, avg=506.58, stdev=290.53 lat (msec): min=302, max=980, avg=506.65, stdev=290.54 clat percentiles (msec): | 1.00th=[ 305], 5.00th=[ 305], 10.00th=[ 305], 20.00th=[ 305], | 30.00th=[ 313], 40.00th=[ 313], 50.00th=[ 347], 60.00th=[ 347], | 70.00th=[ 592], 80.00th=[ 592], 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= 1950, max= 4031, per=45.82%, avg=2655.00, stdev=1191.77, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 500=8.33% lat (msec) : 250=8.33%, 500=66.67%, 750=8.33%, 1000=8.33% cpu : usr=0.00%, sys=11.50%, ctx=226, 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=146798: Sat Aug 15 10:21:13 2026 read: IOPS=0, BW=414KiB/s (424kB/s)(2048KiB/4948msec) clat (msec): min=178, max=214, avg=196.48, stdev=25.44 lat (msec): min=178, max=214, avg=196.48, stdev=25.44 clat percentiles (msec): | 1.00th=[ 180], 5.00th=[ 180], 10.00th=[ 180], 20.00th=[ 180], | 30.00th=[ 180], 40.00th=[ 180], 50.00th=[ 180], 60.00th=[ 215], | 70.00th=[ 215], 80.00th=[ 215], 90.00th=[ 215], 95.00th=[ 215], | 99.00th=[ 215], 99.50th=[ 215], 99.90th=[ 215], 99.95th=[ 215], | 99.99th=[ 215] bw ( KiB/s): min= 1753, max= 1957, per=44.82%, avg=1855.00, stdev=144.25, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2070KiB/s (2119kB/s)(10.0MiB/4948msec); 0 zone resets clat (msec): min=121, max=1053, avg=455.16, stdev=356.34 lat (msec): min=121, max=1053, avg=455.26, stdev=356.37 clat percentiles (msec): | 1.00th=[ 122], 5.00th=[ 122], 10.00th=[ 122], 20.00th=[ 178], | 30.00th=[ 186], 40.00th=[ 194], 50.00th=[ 220], 60.00th=[ 279], | 70.00th=[ 609], 80.00th=[ 760], 90.00th=[ 961], 95.00th=[ 1053], | 99.00th=[ 1053], 99.50th=[ 1053], 99.90th=[ 1053], 99.95th=[ 1053], | 99.99th=[ 1053] bw ( KiB/s): min= 1957, max= 5851, per=60.45%, avg=3502.40, stdev=2066.04, samples=5 iops : min= 1, max= 5, avg= 2.60, stdev= 2.19, samples=5 lat (msec) : 250=58.33%, 500=8.33%, 750=8.33%, 1000=16.67%, 2000=8.33% cpu : usr=0.00%, sys=9.70%, ctx=148, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=2,10,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146799: Sat Aug 15 10:21:13 2026 read: IOPS=1, BW=1425KiB/s (1459kB/s)(6144KiB/4313msec) clat (usec): min=432, max=559508, avg=157116.28, stdev=248175.25 lat (usec): min=434, max=559508, avg=157117.13, stdev=248174.91 clat percentiles (usec): | 1.00th=[ 433], 5.00th=[ 433], 10.00th=[ 433], 20.00th=[ 453], | 30.00th=[ 453], 40.00th=[ 494], 50.00th=[ 494], 60.00th=[ 3654], | 70.00th=[379585], 80.00th=[379585], 90.00th=[557843], 95.00th=[557843], | 99.00th=[557843], 99.50th=[557843], 99.90th=[557843], 99.95th=[557843], | 99.99th=[557843] bw ( KiB/s): min= 1957, max= 3785, per=58.84%, avg=2435.25, stdev=900.15, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=1, BW=1425KiB/s (1459kB/s)(6144KiB/4313msec); 0 zone resets clat (msec): min=282, max=1174, avg=559.64, stdev=325.04 lat (msec): min=283, max=1174, avg=559.70, stdev=325.05 clat percentiles (msec): | 1.00th=[ 284], 5.00th=[ 284], 10.00th=[ 284], 20.00th=[ 326], | 30.00th=[ 326], 40.00th=[ 460], 50.00th=[ 460], 60.00th=[ 493], | 70.00th=[ 625], 80.00th=[ 625], 90.00th=[ 1167], 95.00th=[ 1167], | 99.00th=[ 1167], 99.50th=[ 1167], 99.90th=[ 1167], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 1875, max= 2015, per=33.44%, avg=1937.80, stdev=55.94, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (usec) : 500=25.00% lat (msec) : 4=8.33%, 500=41.67%, 750=16.67%, 2000=8.33% cpu : usr=0.00%, sys=7.82%, ctx=122, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=146800: Sat Aug 15 10:21:13 2026 read: IOPS=1, BW=1069KiB/s (1095kB/s)(5120KiB/4788msec) clat (usec): min=330, max=407810, avg=128443.12, stdev=185580.08 lat (usec): min=331, max=407811, avg=128444.45, stdev=185580.29 clat percentiles (usec): | 1.00th=[ 330], 5.00th=[ 330], 10.00th=[ 330], 20.00th=[ 330], | 30.00th=[ 449], 40.00th=[ 449], 50.00th=[ 1385], 60.00th=[ 1385], | 70.00th=[231736], 80.00th=[231736], 90.00th=[408945], 95.00th=[408945], | 99.00th=[408945], 99.50th=[408945], 99.90th=[408945], 99.95th=[408945], | 99.99th=[408945] bw ( KiB/s): min= 1957, max= 5678, per=92.23%, avg=3817.50, stdev=2631.14, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1497KiB/s (1533kB/s)(7168KiB/4788msec); 0 zone resets clat (msec): min=124, max=1277, avg=580.76, stdev=418.95 lat (msec): min=124, max=1277, avg=581.33, stdev=418.95 clat percentiles (msec): | 1.00th=[ 125], 5.00th=[ 125], 10.00th=[ 125], 20.00th=[ 178], | 30.00th=[ 380], 40.00th=[ 380], 50.00th=[ 518], 60.00th=[ 617], | 70.00th=[ 617], 80.00th=[ 969], 90.00th=[ 1284], 95.00th=[ 1284], | 99.00th=[ 1284], 99.50th=[ 1284], 99.90th=[ 1284], 99.95th=[ 1284], | 99.99th=[ 1284] bw ( KiB/s): min= 2015, max= 4023, per=52.01%, avg=3013.50, stdev=1134.22, samples=4 iops : min= 1, max= 3, avg= 2.25, stdev= 0.96, samples=4 lat (usec) : 500=16.67% lat (msec) : 2=8.33%, 250=25.00%, 500=16.67%, 750=16.67%, 1000=8.33% lat (msec) : 2000=8.33% cpu : usr=0.00%, sys=6.71%, ctx=66, 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=4139KiB/s (4238kB/s), 414KiB/s-1635KiB/s (424kB/s-1674kB/s), io=20.0MiB (20.0MB), run=4313-4948msec WRITE: bw=5795KiB/s (5934kB/s), 1168KiB/s-2070KiB/s (1196kB/s-2119kB/s), io=28.0MiB (29.4MB), run=4313-4948msec rand-rw: (groupid=0, jobs=1): err= 0: pid=146792: Sat Aug 15 10:21:14 2026 read: IOPS=1, BW=1722KiB/s (1764kB/s)(7168KiB/4162msec) clat (msec): min=99, max=553, avg=258.60, stdev=160.51 lat (msec): min=99, max=553, avg=258.60, stdev=160.51 clat percentiles (msec): | 1.00th=[ 100], 5.00th=[ 100], 10.00th=[ 100], 20.00th=[ 104], | 30.00th=[ 157], 40.00th=[ 157], 50.00th=[ 255], 60.00th=[ 313], | 70.00th=[ 313], 80.00th=[ 330], 90.00th=[ 550], 95.00th=[ 550], | 99.00th=[ 550], 99.50th=[ 550], 99.90th=[ 550], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 2035, max= 5003, per=100.00%, avg=3567.00, stdev=1486.33, samples=3 iops : min= 1, max= 4, avg= 2.67, stdev= 1.53, samples=3 write: IOPS=1, BW=1230KiB/s (1260kB/s)(5120KiB/4162msec); 0 zone resets clat (msec): min=378, max=521, avg=457.56, stdev=63.93 lat (msec): min=378, max=521, avg=458.16, stdev=63.50 clat percentiles (msec): | 1.00th=[ 380], 5.00th=[ 380], 10.00th=[ 380], 20.00th=[ 380], | 30.00th=[ 414], 40.00th=[ 414], 50.00th=[ 451], 60.00th=[ 451], | 70.00th=[ 523], 80.00th=[ 523], 90.00th=[ 523], 95.00th=[ 523], | 99.00th=[ 523], 99.50th=[ 523], 99.90th=[ 523], 99.95th=[ 523], | 99.99th=[ 523] bw ( KiB/s): min= 2015, max= 2043, per=43.91%, avg=2029.00, stdev=12.44, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 100=8.33%, 250=16.67%, 500=50.00%, 750=25.00% cpu : usr=0.00%, sys=3.60%, ctx=83, 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=146793: Sat Aug 15 10:21:14 2026 read: IOPS=0, BW=333KiB/s (341kB/s)(2048KiB/6152msec) clat (msec): min=123, max=751, avg=437.33, stdev=444.51 lat (msec): min=123, max=751, avg=437.33, stdev=444.51 clat percentiles (msec): | 1.00th=[ 124], 5.00th=[ 124], 10.00th=[ 124], 20.00th=[ 124], | 30.00th=[ 124], 40.00th=[ 124], 50.00th=[ 124], 60.00th=[ 751], | 70.00th=[ 751], 80.00th=[ 751], 90.00th=[ 751], 95.00th=[ 751], | 99.00th=[ 751], 99.50th=[ 751], 99.90th=[ 751], 99.95th=[ 751], | 99.99th=[ 751] bw ( KiB/s): min= 1494, max= 2031, per=53.39%, avg=1762.50, stdev=379.72, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1664KiB/s (1704kB/s)(10.0MiB/6152msec); 0 zone resets clat (msec): min=222, max=1076, avg=522.28, stdev=289.08 lat (msec): min=222, max=1076, avg=522.52, stdev=288.94 clat percentiles (msec): | 1.00th=[ 224], 5.00th=[ 224], 10.00th=[ 224], 20.00th=[ 268], | 30.00th=[ 268], 40.00th=[ 309], 50.00th=[ 313], 60.00th=[ 642], | 70.00th=[ 651], 80.00th=[ 659], 90.00th=[ 818], 95.00th=[ 1083], | 99.00th=[ 1083], 99.50th=[ 1083], 99.90th=[ 1083], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 1494, max= 4063, per=47.70%, avg=2204.29, stdev=841.92, samples=7 iops : min= 1, max= 3, avg= 1.29, stdev= 0.76, samples=7 lat (msec) : 250=16.67%, 500=33.33%, 750=25.00%, 1000=16.67%, 2000=8.33% cpu : usr=0.00%, sys=3.33%, ctx=108, 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=146794: Sat Aug 15 10:21:14 2026 read: IOPS=0, BW=1005KiB/s (1029kB/s)(6144KiB/6112msec) clat (msec): min=90, max=1405, avg=505.99, stdev=516.43 lat (msec): min=90, max=1405, avg=505.99, stdev=516.43 clat percentiles (msec): | 1.00th=[ 91], 5.00th=[ 91], 10.00th=[ 91], 20.00th=[ 134], | 30.00th=[ 134], 40.00th=[ 266], 50.00th=[ 266], 60.00th=[ 300], | 70.00th=[ 844], 80.00th=[ 844], 90.00th=[ 1401], 95.00th=[ 1401], | 99.00th=[ 1401], 99.50th=[ 1401], 99.90th=[ 1401], 99.95th=[ 1401], | 99.99th=[ 1401] bw ( KiB/s): min= 2031, max= 4087, per=77.23%, avg=2549.25, stdev=1025.20, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 write: IOPS=0, BW=1005KiB/s (1029kB/s)(6144KiB/6112msec); 0 zone resets clat (msec): min=244, max=1142, avg=495.33, stdev=323.72 lat (msec): min=244, max=1142, avg=495.44, stdev=323.81 clat percentiles (msec): | 1.00th=[ 245], 5.00th=[ 245], 10.00th=[ 245], 20.00th=[ 359], | 30.00th=[ 359], 40.00th=[ 380], 50.00th=[ 380], 60.00th=[ 414], | 70.00th=[ 430], 80.00th=[ 430], 90.00th=[ 1150], 95.00th=[ 1150], | 99.00th=[ 1150], 99.50th=[ 1150], 99.90th=[ 1150], 99.95th=[ 1150], | 99.99th=[ 1150] bw ( KiB/s): min= 1558, max= 2035, per=41.82%, avg=1932.40, stdev=209.44, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 100=8.33%, 250=16.67%, 500=50.00%, 1000=8.33%, 2000=16.67% cpu : usr=0.00%, sys=2.00%, ctx=64, 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=146795: Sat Aug 15 10:21:14 2026 read: IOPS=0, BW=825KiB/s (845kB/s)(5120KiB/6204msec) clat (msec): min=105, max=642, avg=404.73, stdev=257.05 lat (msec): min=105, max=642, avg=404.73, stdev=257.05 clat percentiles (msec): | 1.00th=[ 107], 5.00th=[ 107], 10.00th=[ 107], 20.00th=[ 107], | 30.00th=[ 153], 40.00th=[ 153], 50.00th=[ 510], 60.00th=[ 510], | 70.00th=[ 617], 80.00th=[ 617], 90.00th=[ 642], 95.00th=[ 642], | 99.00th=[ 642], 99.50th=[ 642], 99.90th=[ 642], 99.95th=[ 642], | 99.99th=[ 642] bw ( KiB/s): min= 1957, max= 4096, per=81.67%, avg=2696.00, stdev=1213.06, samples=3 iops : min= 1, max= 4, avg= 2.00, stdev= 1.73, samples=3 write: IOPS=1, BW=1155KiB/s (1183kB/s)(7168KiB/6204msec); 0 zone resets clat (msec): min=209, max=1281, avg=580.62, stdev=357.68 lat (msec): min=209, max=1281, avg=580.70, stdev=357.69 clat percentiles (msec): | 1.00th=[ 211], 5.00th=[ 211], 10.00th=[ 211], 20.00th=[ 330], | 30.00th=[ 388], 40.00th=[ 388], 50.00th=[ 472], 60.00th=[ 642], | 70.00th=[ 642], 80.00th=[ 735], 90.00th=[ 1284], 95.00th=[ 1284], | 99.00th=[ 1284], 99.50th=[ 1284], 99.90th=[ 1284], 99.95th=[ 1284], | 99.99th=[ 1284] bw ( KiB/s): min= 1553, max= 4063, per=50.63%, avg=2339.40, stdev=985.19, samples=5 iops : min= 1, max= 3, avg= 1.40, stdev= 0.89, samples=5 lat (msec) : 250=25.00%, 500=25.00%, 750=41.67%, 2000=8.33% cpu : usr=0.05%, sys=3.18%, ctx=67, 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=3301KiB/s (3380kB/s), 333KiB/s-1722KiB/s (341kB/s-1764kB/s), io=20.0MiB (20.0MB), run=4162-6204msec WRITE: bw=4622KiB/s (4732kB/s), 1005KiB/s-1664KiB/s (1029kB/s-1704kB/s), io=28.0MiB (29.4MB), run=4162-6204msec 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=146807: Sat Aug 15 10:21:25 2026 read: IOPS=1, BW=5598KiB/s (5733kB/s)(12.0MiB/2195msec) clat (msec): min=625, max=846, avg=712.26, stdev=117.62 lat (msec): min=625, max=846, avg=712.26, stdev=117.62 clat percentiles (msec): | 1.00th=[ 625], 5.00th=[ 625], 10.00th=[ 625], 20.00th=[ 625], | 30.00th=[ 625], 40.00th=[ 667], 50.00th=[ 667], 60.00th=[ 667], | 70.00th=[ 844], 80.00th=[ 844], 90.00th=[ 844], 95.00th=[ 844], | 99.00th=[ 844], 99.50th=[ 844], 99.90th=[ 844], 99.95th=[ 844], | 99.99th=[ 844] bw ( KiB/s): min= 8062, max= 8192, per=100.00%, avg=8127.00, stdev=91.92, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=21.24%, ctx=325, 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=146808: Sat Aug 15 10:21:25 2026 read: IOPS=0, BW=1710KiB/s (1751kB/s)(4096KiB/2395msec) clat (nsec): min=560861k, max=560861k, avg=560860868.00, stdev= 0.00 lat (nsec): min=560863k, max=560863k, avg=560862658.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 558], 5.00th=[ 558], 10.00th=[ 558], 20.00th=[ 558], | 30.00th=[ 558], 40.00th=[ 558], 50.00th=[ 558], 60.00th=[ 558], | 70.00th=[ 558], 80.00th=[ 558], 90.00th=[ 558], 95.00th=[ 558], | 99.00th=[ 558], 99.50th=[ 558], 99.90th=[ 558], 99.95th=[ 558], | 99.99th=[ 558] bw ( KiB/s): min= 6770, max= 6770, per=98.98%, avg=6770.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3420KiB/s (3503kB/s)(8192KiB/2395msec); 0 zone resets clat (msec): min=585, max=1201, avg=893.41, stdev=435.49 lat (msec): min=588, max=1201, avg=894.95, stdev=433.75 clat percentiles (msec): | 1.00th=[ 584], 5.00th=[ 584], 10.00th=[ 584], 20.00th=[ 584], | 30.00th=[ 584], 40.00th=[ 584], 50.00th=[ 584], 60.00th=[ 1200], | 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= 8192, max= 8192, per=67.23%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.00%, sys=7.06%, ctx=179, 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=146809: Sat Aug 15 10:21:25 2026 write: IOPS=1, BW=4570KiB/s (4679kB/s)(12.0MiB/2689msec); 0 zone resets clat (msec): min=672, max=1045, avg=882.24, stdev=190.77 lat (msec): min=678, max=1046, avg=884.95, stdev=187.92 clat percentiles (msec): | 1.00th=[ 676], 5.00th=[ 676], 10.00th=[ 676], 20.00th=[ 676], | 30.00th=[ 676], 40.00th=[ 927], 50.00th=[ 927], 60.00th=[ 927], | 70.00th=[ 1045], 80.00th=[ 1045], 90.00th=[ 1045], 95.00th=[ 1045], | 99.00th=[ 1045], 99.50th=[ 1045], 99.90th=[ 1045], 99.95th=[ 1045], | 99.99th=[ 1045] bw ( KiB/s): min= 8175, max= 8192, per=67.16%, avg=8183.50, stdev=12.02, 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=8.30%, ctx=88, 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=146810: Sat Aug 15 10:21:25 2026 write: IOPS=1, BW=6172KiB/s (6320kB/s)(12.0MiB/1991msec); 0 zone resets clat (msec): min=439, max=741, avg=639.83, stdev=173.11 lat (msec): min=440, max=741, avg=640.13, stdev=173.10 clat percentiles (msec): | 1.00th=[ 439], 5.00th=[ 439], 10.00th=[ 439], 20.00th=[ 439], | 30.00th=[ 439], 40.00th=[ 743], 50.00th=[ 743], 60.00th=[ 743], | 70.00th=[ 743], 80.00th=[ 743], 90.00th=[ 743], 95.00th=[ 743], | 99.00th=[ 743], 99.50th=[ 743], 99.90th=[ 743], 99.95th=[ 743], | 99.99th=[ 743] bw ( KiB/s): min= 7501, max= 8192, per=64.39%, avg=7846.50, stdev=488.61, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=33.33%, 750=66.67% cpu : usr=0.00%, sys=6.78%, ctx=74, 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 Run status group 0 (all jobs): READ: bw=6841KiB/s (7005kB/s), 1710KiB/s-5598KiB/s (1751kB/s-5733kB/s), io=16.0MiB (16.8MB), run=2195-2395msec WRITE: bw=11.9MiB/s (12.5MB/s), 3420KiB/s-6172KiB/s (3503kB/s-6320kB/s), io=32.0MiB (33.6MB), run=1991-2689msec rand-rw: (groupid=0, jobs=1): err= 0: pid=146811: Sat Aug 15 10:21:26 2026 read: IOPS=1, BW=4297KiB/s (4400kB/s)(12.0MiB/2860msec) clat (msec): min=255, max=1380, avg=918.99, stdev=589.42 lat (msec): min=255, max=1380, avg=918.99, stdev=589.42 clat percentiles (msec): | 1.00th=[ 255], 5.00th=[ 255], 10.00th=[ 255], 20.00th=[ 255], | 30.00th=[ 255], 40.00th=[ 1116], 50.00th=[ 1116], 60.00th=[ 1116], | 70.00th=[ 1385], 80.00th=[ 1385], 90.00th=[ 1385], 95.00th=[ 1385], | 99.00th=[ 1385], 99.50th=[ 1385], 99.90th=[ 1385], 99.95th=[ 1385], | 99.99th=[ 1385] bw ( KiB/s): min= 8126, max= 8159, per=100.00%, avg=8142.50, stdev=23.33, 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=3.22%, ctx=43, 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=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=146812: Sat Aug 15 10:21:26 2026 read: IOPS=0, BW=1379KiB/s (1412kB/s)(4096KiB/2970msec) clat (nsec): min=694665k, max=694665k, avg=694664551.00, stdev= 0.00 lat (nsec): min=694667k, max=694667k, avg=694666881.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 693], 5.00th=[ 693], 10.00th=[ 693], 20.00th=[ 693], | 30.00th=[ 693], 40.00th=[ 693], 50.00th=[ 693], 60.00th=[ 693], | 70.00th=[ 693], 80.00th=[ 693], 90.00th=[ 693], 95.00th=[ 693], | 99.00th=[ 693], 99.50th=[ 693], 99.90th=[ 693], 99.95th=[ 693], | 99.99th=[ 693] bw ( KiB/s): min= 8192, max= 8192, per=100.00%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2758KiB/s (2824kB/s)(8192KiB/2970msec); 0 zone resets clat (msec): min=805, max=1443, avg=1124.56, stdev=451.40 lat (msec): min=806, max=1444, avg=1125.49, stdev=450.63 clat percentiles (msec): | 1.00th=[ 810], 5.00th=[ 810], 10.00th=[ 810], 20.00th=[ 810], | 30.00th=[ 810], 40.00th=[ 810], 50.00th=[ 810], 60.00th=[ 1452], | 70.00th=[ 1452], 80.00th=[ 1452], 90.00th=[ 1452], 95.00th=[ 1452], | 99.00th=[ 1452], 99.50th=[ 1452], 99.90th=[ 1452], 99.95th=[ 1452], | 99.99th=[ 1452] bw ( KiB/s): min= 8159, max= 8159, per=83.04%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.30%, ctx=51, 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=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=146813: Sat Aug 15 10:21:26 2026 write: IOPS=0, BW=3685KiB/s (3773kB/s)(12.0MiB/3335msec); 0 zone resets clat (msec): min=255, max=1546, avg=1068.02, stdev=707.34 lat (msec): min=255, max=1547, avg=1068.34, stdev=707.31 clat percentiles (msec): | 1.00th=[ 255], 5.00th=[ 255], 10.00th=[ 255], 20.00th=[ 255], | 30.00th=[ 255], 40.00th=[ 1401], 50.00th=[ 1401], 60.00th=[ 1401], | 70.00th=[ 1552], 80.00th=[ 1552], 90.00th=[ 1552], 95.00th=[ 1552], | 99.00th=[ 1552], 99.50th=[ 1552], 99.90th=[ 1552], 99.95th=[ 1552], | 99.99th=[ 1552] bw ( KiB/s): min= 8159, max= 8192, per=83.21%, avg=8175.50, stdev=23.33, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.39%, ctx=36, 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 rand-rw: (groupid=0, jobs=1): err= 0: pid=146814: Sat Aug 15 10:21:26 2026 write: IOPS=1, BW=5361KiB/s (5490kB/s)(12.0MiB/2292msec); 0 zone resets clat (msec): min=684, max=784, avg=727.03, stdev=52.02 lat (msec): min=684, max=789, avg=728.67, stdev=54.20 clat percentiles (msec): | 1.00th=[ 684], 5.00th=[ 684], 10.00th=[ 684], 20.00th=[ 684], | 30.00th=[ 684], 40.00th=[ 709], 50.00th=[ 709], 60.00th=[ 709], | 70.00th=[ 785], 80.00th=[ 785], 90.00th=[ 785], 95.00th=[ 785], | 99.00th=[ 785], 99.50th=[ 785], 99.90th=[ 785], 99.95th=[ 785], | 99.99th=[ 785] bw ( KiB/s): min= 8159, max= 8192, per=83.21%, avg=8175.50, stdev=23.33, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 750=66.67%, 1000=33.33% cpu : usr=0.00%, sys=9.73%, ctx=139, 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=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=5516KiB/s (5649kB/s), 1379KiB/s-4297KiB/s (1412kB/s-4400kB/s), io=16.0MiB (16.8MB), run=2860-2970msec WRITE: bw=9825KiB/s (10.1MB/s), 2758KiB/s-5361KiB/s (2824kB/s-5490kB/s), io=32.0MiB (33.6MB), run=2292-3335msec