== sanity test 398b: DIO and buffer IO race ============== 00:02:41 (1786766561) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.83114 s, 7.4 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=179341: Sat Aug 15 00:05:33 2026 read: IOPS=9, BW=39.3KiB/s (40.3kB/s)(5992KiB/152308msec) clat (usec): min=50, max=303081, avg=54998.49, stdev=35658.26 lat (usec): min=51, max=303082, avg=55000.95, stdev=35657.58 clat percentiles (usec): | 1.00th=[ 64], 5.00th=[ 14484], 10.00th=[ 20317], 20.00th=[ 27919], | 30.00th=[ 34341], 40.00th=[ 40633], 50.00th=[ 47973], 60.00th=[ 56361], | 70.00th=[ 65274], 80.00th=[ 78119], 90.00th=[ 98042], 95.00th=[116917], | 99.00th=[179307], 99.50th=[227541], 99.90th=[287310], 99.95th=[304088], | 99.99th=[304088] bw ( KiB/s): min= 7, max= 103, per=25.12%, avg=39.43, stdev=16.46, samples=294 iops : min= 1, max= 25, avg= 9.18, stdev= 4.13, samples=294 write: IOPS=10, BW=41.3KiB/s (42.3kB/s)(6296KiB/152308msec); 0 zone resets clat (usec): min=1193, max=1375.3k, avg=44073.34, stdev=54682.90 lat (usec): min=1201, max=1375.3k, avg=44078.89, stdev=54681.25 clat percentiles (usec): | 1.00th=[ 1336], 5.00th=[ 1582], 10.00th=[ 2638], | 20.00th=[ 5866], 30.00th=[ 11863], 40.00th=[ 21627], | 50.00th=[ 31327], 60.00th=[ 42206], 70.00th=[ 55837], | 80.00th=[ 73925], 90.00th=[ 100140], 95.00th=[ 131597], | 99.00th=[ 196084], 99.50th=[ 212861], 99.90th=[ 295699], | 99.95th=[1367344], 99.99th=[1367344] bw ( KiB/s): min= 7, max= 104, per=24.90%, avg=41.09, stdev=18.82, samples=297 iops : min= 1, max= 26, avg= 9.60, stdev= 4.73, samples=297 lat (usec) : 100=1.30%, 250=0.13%, 500=0.13% lat (msec) : 2=3.84%, 4=3.68%, 10=7.19%, 20=8.14%, 50=35.29% lat (msec) : 100=30.63%, 250=9.47%, 500=0.16%, 2000=0.03% cpu : usr=0.08%, sys=4.84%, ctx=7086, 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=179342: Sat Aug 15 00:05:33 2026 read: IOPS=9, BW=39.4KiB/s (40.3kB/s)(5940KiB/150799msec) clat (usec): min=47, max=273488, avg=55272.18, stdev=34943.01 lat (usec): min=48, max=273490, avg=55278.13, stdev=34942.97 clat percentiles (usec): | 1.00th=[ 63], 5.00th=[ 15664], 10.00th=[ 21627], 20.00th=[ 27919], | 30.00th=[ 34341], 40.00th=[ 41157], 50.00th=[ 47973], 60.00th=[ 56361], | 70.00th=[ 65799], 80.00th=[ 78119], 90.00th=[ 98042], 95.00th=[119014], | 99.00th=[173016], 99.50th=[219153], 99.90th=[274727], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 7, max= 95, per=24.88%, avg=39.07, stdev=17.92, samples=295 iops : min= 1, max= 23, avg= 9.09, stdev= 4.49, samples=295 write: IOPS=10, BW=42.1KiB/s (43.1kB/s)(6348KiB/150799msec); 0 zone resets clat (usec): min=1237, max=1344.6k, avg=42901.33, stdev=52519.48 lat (usec): min=1239, max=1344.6k, avg=42909.84, stdev=52524.50 clat percentiles (usec): | 1.00th=[ 1336], 5.00th=[ 1598], 10.00th=[ 2540], | 20.00th=[ 6128], 30.00th=[ 11207], 40.00th=[ 20841], | 50.00th=[ 29754], 60.00th=[ 40109], 70.00th=[ 53740], | 80.00th=[ 77071], 90.00th=[ 100140], 95.00th=[ 125305], | 99.00th=[ 164627], 99.50th=[ 200279], 99.90th=[ 291505], | 99.95th=[1350566], 99.99th=[1350566] bw ( KiB/s): min= 7, max= 119, per=25.16%, avg=41.52, stdev=19.71, samples=296 iops : min= 1, max= 29, avg= 9.70, stdev= 4.97, samples=296 lat (usec) : 50=0.07%, 100=1.20%, 250=0.13%, 500=0.07% lat (msec) : 2=3.84%, 4=3.65%, 10=7.26%, 20=8.04%, 50=35.94% lat (msec) : 100=30.01%, 250=9.57%, 500=0.20%, 2000=0.03% cpu : usr=0.08%, sys=5.07%, ctx=7016, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179343: Sat Aug 15 00:05:33 2026 read: IOPS=10, BW=40.7KiB/s (41.7kB/s)(6028KiB/148179msec) clat (usec): min=44, max=252780, avg=53243.60, stdev=33471.00 lat (usec): min=45, max=252781, avg=53251.50, stdev=33481.21 clat percentiles (usec): | 1.00th=[ 62], 5.00th=[ 14484], 10.00th=[ 20579], 20.00th=[ 27919], | 30.00th=[ 33817], 40.00th=[ 39060], 50.00th=[ 46400], 60.00th=[ 54789], | 70.00th=[ 63701], 80.00th=[ 74974], 90.00th=[ 92799], 95.00th=[114820], | 99.00th=[173016], 99.50th=[202376], 99.90th=[235930], 99.95th=[252707], | 99.99th=[252707] bw ( KiB/s): min= 7, max= 103, per=25.78%, avg=40.48, stdev=16.03, samples=289 iops : min= 1, max= 25, avg= 9.44, stdev= 4.03, samples=289 write: IOPS=10, BW=42.2KiB/s (43.3kB/s)(6260KiB/148179msec); 0 zone resets clat (usec): min=1100, max=1536.1k, avg=43030.28, stdev=57256.75 lat (usec): min=1101, max=1536.1k, avg=43051.74, stdev=57258.28 clat percentiles (usec): | 1.00th=[ 1385], 5.00th=[ 1778], 10.00th=[ 3032], | 20.00th=[ 6063], 30.00th=[ 10552], 40.00th=[ 20579], | 50.00th=[ 30016], 60.00th=[ 40109], 70.00th=[ 53216], | 80.00th=[ 70779], 90.00th=[ 100140], 95.00th=[ 127402], | 99.00th=[ 187696], 99.50th=[ 229639], 99.90th=[ 320865], | 99.95th=[1535116], 99.99th=[1535116] bw ( KiB/s): min= 7, max= 111, per=25.40%, avg=41.91, stdev=19.78, samples=290 iops : min= 1, max= 27, avg= 9.80, stdev= 4.98, samples=290 lat (usec) : 50=0.13%, 100=1.27%, 250=0.20%, 500=0.03%, 750=0.03% lat (msec) : 2=3.22%, 4=3.65%, 10=8.07%, 20=8.11%, 50=36.07% lat (msec) : 100=30.34%, 250=8.66%, 500=0.20%, 2000=0.03% cpu : usr=0.08%, sys=4.89%, ctx=6755, 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=179344: Sat Aug 15 00:05:33 2026 read: IOPS=9, BW=39.0KiB/s (40.0kB/s)(6052KiB/151309msec) clat (usec): min=39, max=1569.6k, avg=55540.98, stdev=52438.91 lat (usec): min=39, max=1569.6k, avg=55555.62, stdev=52442.47 clat percentiles (usec): | 1.00th=[ 61], 5.00th=[ 12780], 10.00th=[ 20317], | 20.00th=[ 27919], 30.00th=[ 34341], 40.00th=[ 40633], | 50.00th=[ 47449], 60.00th=[ 55837], 70.00th=[ 64226], | 80.00th=[ 77071], 90.00th=[ 99091], 95.00th=[ 119014], | 99.00th=[ 175113], 99.50th=[ 210764], 99.90th=[ 295699], | 99.95th=[1568670], 99.99th=[1568670] bw ( KiB/s): min= 7, max= 102, per=25.30%, avg=39.73, stdev=16.14, samples=295 iops : min= 1, max= 25, avg= 9.26, stdev= 4.06, samples=295 write: IOPS=10, BW=41.2KiB/s (42.2kB/s)(6236KiB/151309msec); 0 zone resets clat (usec): min=1194, max=306162, avg=42745.28, stdev=43153.56 lat (usec): min=1194, max=306163, avg=42749.71, stdev=43155.64 clat percentiles (usec): | 1.00th=[ 1336], 5.00th=[ 1565], 10.00th=[ 2573], 20.00th=[ 5538], | 30.00th=[ 10945], 40.00th=[ 21365], 50.00th=[ 30540], 60.00th=[ 41157], | 70.00th=[ 54789], 80.00th=[ 72877], 90.00th=[102237], 95.00th=[131597], | 99.00th=[187696], 99.50th=[212861], 99.90th=[299893], 99.95th=[304088], | 99.99th=[304088] bw ( KiB/s): min= 7, max= 102, per=24.99%, avg=41.23, stdev=17.11, samples=293 iops : min= 1, max= 25, avg= 9.63, stdev= 4.32, samples=293 lat (usec) : 50=0.10%, 100=1.46%, 250=0.16%, 500=0.10%, 750=0.03% lat (msec) : 2=3.97%, 4=4.07%, 10=6.67%, 20=7.94%, 50=34.99% lat (msec) : 100=30.27%, 250=10.06%, 500=0.13%, 2000=0.03% cpu : usr=0.09%, sys=4.89%, ctx=6931, 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=158KiB/s (161kB/s), 39.3KiB/s-40.7KiB/s (40.3kB/s-41.7kB/s), io=23.4MiB (24.6MB), run=148179-152308msec WRITE: bw=165KiB/s (169kB/s), 41.2KiB/s-42.2KiB/s (42.2kB/s-43.3kB/s), io=24.6MiB (25.7MB), run=148179-152308msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179346: Sat Aug 15 00:06:15 2026 read: IOPS=7, BW=31.2KiB/s (31.0kB/s)(5992KiB/191960msec) clat (msec): min=6, max=1613, avg=52.32, stdev=62.80 lat (msec): min=6, max=1613, avg=52.33, stdev=62.80 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 19], | 30.00th=[ 23], 40.00th=[ 29], 50.00th=[ 34], 60.00th=[ 43], | 70.00th=[ 53], 80.00th=[ 78], 90.00th=[ 116], 95.00th=[ 153], | 99.00th=[ 239], 99.50th=[ 305], 99.90th=[ 347], 99.95th=[ 1620], | 99.99th=[ 1620] bw ( KiB/s): min= 7, max= 119, per=25.86%, avg=32.07, stdev=22.84, samples=362 iops : min= 1, max= 29, avg= 7.32, stdev= 5.75, samples=362 write: IOPS=8, BW=32.8KiB/s (33.6kB/s)(6296KiB/191960msec); 0 zone resets clat (msec): min=10, max=463, avg=72.03, stdev=51.70 lat (msec): min=10, max=463, avg=72.04, stdev=51.70 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 23], 10.00th=[ 27], 20.00th=[ 33], | 30.00th=[ 38], 40.00th=[ 45], 50.00th=[ 54], 60.00th=[ 67], | 70.00th=[ 86], 80.00th=[ 112], 90.00th=[ 140], 95.00th=[ 174], | 99.00th=[ 245], 99.50th=[ 300], 99.90th=[ 372], 99.95th=[ 464], | 99.99th=[ 464] bw ( KiB/s): min= 7, max= 103, per=25.51%, avg=32.91, stdev=21.61, samples=371 iops : min= 1, max= 25, avg= 7.52, stdev= 5.44, samples=371 lat (msec) : 10=1.33%, 20=11.43%, 50=43.59%, 100=25.13%, 250=17.61% lat (msec) : 500=0.88%, 2000=0.03% cpu : usr=0.05%, sys=2.04%, ctx=5051, 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=179347: Sat Aug 15 00:06:15 2026 read: IOPS=7, BW=30.9KiB/s (31.6kB/s)(5940KiB/192536msec) clat (msec): min=5, max=1472, avg=51.41, stdev=59.75 lat (msec): min=5, max=1472, avg=51.41, stdev=59.75 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 18], | 30.00th=[ 23], 40.00th=[ 28], 50.00th=[ 34], 60.00th=[ 43], | 70.00th=[ 55], 80.00th=[ 74], 90.00th=[ 112], 95.00th=[ 146], | 99.00th=[ 249], 99.50th=[ 292], 99.90th=[ 359], 99.95th=[ 1469], | 99.99th=[ 1469] bw ( KiB/s): min= 7, max= 127, per=25.80%, avg=31.99, stdev=23.62, samples=359 iops : min= 1, max= 31, avg= 7.30, stdev= 5.95, samples=359 write: IOPS=8, BW=32.0KiB/s (33.8kB/s)(6348KiB/192536msec); 0 zone resets clat (msec): min=14, max=462, avg=73.07, stdev=53.74 lat (msec): min=14, max=462, avg=73.07, stdev=53.74 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 23], 10.00th=[ 26], 20.00th=[ 33], | 30.00th=[ 38], 40.00th=[ 45], 50.00th=[ 55], 60.00th=[ 68], | 70.00th=[ 86], 80.00th=[ 109], 90.00th=[ 150], 95.00th=[ 180], | 99.00th=[ 268], 99.50th=[ 296], 99.90th=[ 380], 99.95th=[ 464], | 99.99th=[ 464] bw ( KiB/s): min= 7, max= 103, per=25.64%, avg=33.08, stdev=21.21, samples=372 iops : min= 1, max= 25, avg= 7.56, stdev= 5.34, samples=372 lat (msec) : 10=1.14%, 20=12.14%, 50=43.10%, 100=25.65%, 250=16.93% lat (msec) : 500=1.01%, 2000=0.03% cpu : usr=0.06%, sys=1.97%, ctx=5183, 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=179348: Sat Aug 15 00:06:15 2026 read: IOPS=7, BW=31.1KiB/s (31.9kB/s)(6028KiB/193615msec) clat (msec): min=6, max=410, avg=52.90, stdev=49.63 lat (msec): min=6, max=410, avg=52.90, stdev=49.63 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 19], | 30.00th=[ 23], 40.00th=[ 29], 50.00th=[ 36], 60.00th=[ 44], | 70.00th=[ 55], 80.00th=[ 79], 90.00th=[ 121], 95.00th=[ 163], | 99.00th=[ 222], 99.50th=[ 271], 99.90th=[ 351], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 7, max= 110, per=25.71%, avg=31.88, stdev=22.68, samples=366 iops : min= 1, max= 27, avg= 7.27, stdev= 5.69, samples=366 write: IOPS=8, BW=32.3KiB/s (33.1kB/s)(6260KiB/193615msec); 0 zone resets clat (msec): min=10, max=1490, avg=72.65, stdev=64.55 lat (msec): min=10, max=1490, avg=72.66, stdev=64.55 clat percentiles (msec): | 1.00th=[ 16], 5.00th=[ 22], 10.00th=[ 25], 20.00th=[ 31], | 30.00th=[ 36], 40.00th=[ 43], 50.00th=[ 52], 60.00th=[ 67], | 70.00th=[ 86], 80.00th=[ 111], 90.00th=[ 146], 95.00th=[ 180], | 99.00th=[ 259], 99.50th=[ 296], 99.90th=[ 380], 99.95th=[ 1485], | 99.99th=[ 1485] bw ( KiB/s): min= 7, max= 111, per=25.09%, avg=32.36, stdev=23.05, samples=374 iops : min= 1, max= 27, avg= 7.39, stdev= 5.80, samples=374 lat (msec) : 10=1.40%, 20=12.17%, 50=43.78%, 100=23.63%, 250=17.97% lat (msec) : 500=1.01%, 2000=0.03% cpu : usr=0.05%, sys=2.03%, ctx=5215, 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=179349: Sat Aug 15 00:06:15 2026 read: IOPS=7, BW=31.7KiB/s (32.5kB/s)(6052KiB/190657msec) clat (msec): min=5, max=331, avg=49.79, stdev=44.87 lat (msec): min=5, max=331, avg=49.81, stdev=44.87 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 19], | 30.00th=[ 23], 40.00th=[ 28], 50.00th=[ 34], 60.00th=[ 42], | 70.00th=[ 55], 80.00th=[ 75], 90.00th=[ 111], 95.00th=[ 142], | 99.00th=[ 213], 99.50th=[ 255], 99.90th=[ 330], 99.95th=[ 330], | 99.99th=[ 330] bw ( KiB/s): min= 7, max= 127, per=26.31%, avg=32.63, stdev=23.67, samples=359 iops : min= 1, max= 31, avg= 7.46, stdev= 5.96, samples=359 write: IOPS=8, BW=32.7KiB/s (33.5kB/s)(6236KiB/190657msec); 0 zone resets clat (msec): min=15, max=1469, avg=73.82, stdev=62.08 lat (msec): min=15, max=1469, avg=73.83, stdev=62.08 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 23], 10.00th=[ 26], 20.00th=[ 33], | 30.00th=[ 39], 40.00th=[ 47], 50.00th=[ 56], 60.00th=[ 70], | 70.00th=[ 88], 80.00th=[ 112], 90.00th=[ 142], 95.00th=[ 176], | 99.00th=[ 249], 99.50th=[ 284], 99.90th=[ 359], 99.95th=[ 1469], | 99.99th=[ 1469] bw ( KiB/s): min= 7, max= 103, per=25.26%, avg=32.59, stdev=21.29, samples=370 iops : min= 1, max= 25, avg= 7.44, stdev= 5.36, samples=370 lat (msec) : 10=1.14%, 20=11.23%, 50=43.20%, 100=26.24%, 250=17.42% lat (msec) : 500=0.75%, 2000=0.03% cpu : usr=0.06%, sys=1.96%, ctx=5085, 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=124KiB/s (127kB/s), 30.9KiB/s-31.7KiB/s (31.6kB/s-32.5kB/s), io=23.4MiB (24.6MB), run=190657-193615msec WRITE: bw=130KiB/s (133kB/s), 32.3KiB/s-32.0KiB/s (33.1kB/s-33.8kB/s), io=24.6MiB (25.7MB), run=190657-193615msec 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=179400: Sat Aug 15 00:06:55 2026 read: IOPS=12, BW=200KiB/s (205kB/s)(5920KiB/29619msec) clat (usec): min=47, max=176992, avg=43491.28, stdev=27118.52 lat (usec): min=48, max=176994, avg=43493.41, stdev=27118.29 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 86], 10.00th=[ 16319], 20.00th=[ 22938], | 30.00th=[ 28181], 40.00th=[ 33424], 50.00th=[ 39060], 60.00th=[ 45351], | 70.00th=[ 52691], 80.00th=[ 62129], 90.00th=[ 78119], 95.00th=[ 90702], | 99.00th=[143655], 99.50th=[145753], 99.90th=[177210], 99.95th=[177210], | 99.99th=[177210] bw ( KiB/s): min= 95, max= 383, per=26.31%, avg=198.40, stdev=70.88, samples=58 iops : min= 5, max= 23, avg=11.64, stdev= 4.52, samples=58 write: IOPS=13, BW=215KiB/s (220kB/s)(6368KiB/29619msec); 0 zone resets clat (usec): min=1589, max=177652, avg=33732.96, stdev=29809.80 lat (usec): min=1591, max=177656, avg=33735.42, stdev=29809.94 clat percentiles (usec): | 1.00th=[ 1778], 5.00th=[ 2868], 10.00th=[ 4293], 20.00th=[ 7963], | 30.00th=[ 11469], 40.00th=[ 19530], 50.00th=[ 26870], 60.00th=[ 32637], | 70.00th=[ 41681], 80.00th=[ 56886], 90.00th=[ 77071], 95.00th=[ 92799], | 99.00th=[126354], 99.50th=[145753], 99.90th=[177210], 99.95th=[177210], | 99.99th=[177210] bw ( KiB/s): min= 31, max= 407, per=27.08%, avg=214.74, stdev=77.13, samples=58 iops : min= 1, max= 25, avg=12.67, stdev= 4.87, samples=58 lat (usec) : 50=0.13%, 100=2.60%, 250=0.65% lat (msec) : 2=1.43%, 4=2.99%, 10=9.64%, 20=10.03%, 50=43.49% lat (msec) : 100=24.74%, 250=4.30% cpu : usr=0.10%, sys=7.61%, ctx=1951, 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=179401: Sat Aug 15 00:06:55 2026 read: IOPS=11, BW=181KiB/s (185kB/s)(5744KiB/31750msec) clat (usec): min=39, max=200790, avg=47551.47, stdev=30199.37 lat (usec): min=40, max=200791, avg=47552.99, stdev=30199.34 clat percentiles (usec): | 1.00th=[ 58], 5.00th=[ 130], 10.00th=[ 19792], 20.00th=[ 26084], | 30.00th=[ 31065], 40.00th=[ 36439], 50.00th=[ 42206], 60.00th=[ 49021], | 70.00th=[ 56886], 80.00th=[ 64750], 90.00th=[ 85459], 95.00th=[105382], | 99.00th=[166724], 99.50th=[187696], 99.90th=[200279], 99.95th=[200279], | 99.99th=[200279] bw ( KiB/s): min= 63, max= 319, per=23.69%, avg=178.63, stdev=62.92, samples=62 iops : min= 3, max= 19, avg=10.37, stdev= 3.92, samples=62 write: IOPS=12, BW=206KiB/s (211kB/s)(6544KiB/31750msec); 0 zone resets clat (usec): min=1791, max=186779, avg=35580.87, stdev=32173.73 lat (usec): min=1793, max=186786, avg=35585.36, stdev=32174.94 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 4], 10.00th=[ 5], 20.00th=[ 8], | 30.00th=[ 12], 40.00th=[ 20], 50.00th=[ 27], 60.00th=[ 35], | 70.00th=[ 44], 80.00th=[ 62], 90.00th=[ 81], 95.00th=[ 102], | 99.00th=[ 134], 99.50th=[ 169], 99.90th=[ 188], 99.95th=[ 188], | 99.99th=[ 188] bw ( KiB/s): min= 63, max= 429, per=25.53%, avg=202.44, stdev=80.25, samples=62 iops : min= 3, max= 26, avg=11.87, stdev= 5.07, samples=62 lat (usec) : 50=0.13%, 100=1.69%, 250=0.65%, 500=0.13%, 1000=0.13% lat (msec) : 2=0.39%, 4=3.52%, 10=10.03%, 20=10.29%, 50=40.23% lat (msec) : 100=27.34%, 250=5.47% cpu : usr=0.09%, sys=7.15%, ctx=1963, 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=179402: Sat Aug 15 00:06:55 2026 read: IOPS=12, BW=200KiB/s (205kB/s)(6256KiB/31232msec) clat (usec): min=49, max=149761, avg=44783.75, stdev=26990.43 lat (usec): min=50, max=149763, avg=44789.64, stdev=26994.82 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 77], 10.00th=[ 14746], 20.00th=[ 24511], | 30.00th=[ 30540], 40.00th=[ 35390], 50.00th=[ 41157], 60.00th=[ 47449], | 70.00th=[ 54789], 80.00th=[ 65799], 90.00th=[ 77071], 95.00th=[ 96994], | 99.00th=[125305], 99.50th=[137364], 99.90th=[149947], 99.95th=[149947], | 99.99th=[149947] bw ( KiB/s): min= 62, max= 365, per=26.47%, avg=199.59, stdev=72.82, samples=61 iops : min= 3, max= 22, avg=11.69, stdev= 4.57, samples=61 write: IOPS=12, BW=193KiB/s (198kB/s)(6032KiB/31232msec); 0 zone resets clat (usec): min=1724, max=160224, avg=35929.88, stdev=29721.12 lat (usec): min=1726, max=160225, avg=35941.69, stdev=29729.80 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 4], 10.00th=[ 6], 20.00th=[ 9], | 30.00th=[ 14], 40.00th=[ 22], 50.00th=[ 30], 60.00th=[ 38], | 70.00th=[ 46], 80.00th=[ 58], 90.00th=[ 81], 95.00th=[ 93], | 99.00th=[ 131], 99.50th=[ 134], 99.90th=[ 161], 99.95th=[ 161], | 99.99th=[ 161] bw ( KiB/s): min= 31, max= 396, per=23.98%, avg=190.18, stdev=75.84, samples=61 iops : min= 1, max= 24, avg=11.10, stdev= 4.73, samples=61 lat (usec) : 50=0.13%, 100=3.39%, 250=0.78%, 500=0.13% lat (msec) : 2=0.52%, 4=2.60%, 10=8.20%, 20=10.03%, 50=41.80% lat (msec) : 100=28.39%, 250=4.04% cpu : usr=0.06%, sys=7.08%, ctx=1999, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179403: Sat Aug 15 00:06:55 2026 read: IOPS=12, BW=202KiB/s (206kB/s)(6032KiB/29913msec) clat (usec): min=52, max=217464, avg=42648.29, stdev=30427.91 lat (usec): min=53, max=217465, avg=42655.41, stdev=30426.35 clat percentiles (usec): | 1.00th=[ 58], 5.00th=[ 72], 10.00th=[ 122], 20.00th=[ 22152], | 30.00th=[ 30016], 40.00th=[ 34341], 50.00th=[ 39060], 60.00th=[ 44303], | 70.00th=[ 49021], 80.00th=[ 57410], 90.00th=[ 74974], 95.00th=[ 95945], | 99.00th=[168821], 99.50th=[210764], 99.90th=[217056], 99.95th=[217056], | 99.99th=[217056] bw ( KiB/s): min= 31, max= 445, per=26.54%, avg=200.08, stdev=81.02, samples=59 iops : min= 1, max= 27, avg=11.73, stdev= 5.08, samples=59 write: IOPS=13, BW=209KiB/s (214kB/s)(6256KiB/29913msec); 0 zone resets clat (usec): min=1650, max=196414, avg=35206.47, stdev=33746.27 lat (usec): min=1652, max=196417, avg=35209.00, stdev=33746.37 clat percentiles (usec): | 1.00th=[ 1876], 5.00th=[ 3064], 10.00th=[ 4555], 20.00th=[ 7308], | 30.00th=[ 11076], 40.00th=[ 17695], 50.00th=[ 27395], 60.00th=[ 33424], | 70.00th=[ 41681], 80.00th=[ 58459], 90.00th=[ 80217], 95.00th=[106431], | 99.00th=[162530], 99.50th=[179307], 99.90th=[196084], 99.95th=[196084], | 99.99th=[196084] bw ( KiB/s): min= 31, max= 415, per=26.36%, avg=209.07, stdev=81.47, samples=59 iops : min= 1, max= 25, avg=12.31, stdev= 5.11, samples=59 lat (usec) : 100=3.91%, 250=1.56% lat (msec) : 2=0.65%, 4=3.65%, 10=10.29%, 20=9.24%, 50=44.01% lat (msec) : 100=21.48%, 250=5.21% cpu : usr=0.07%, sys=6.84%, ctx=1834, 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=754KiB/s (772kB/s), 181KiB/s-202KiB/s (185kB/s-206kB/s), io=23.4MiB (24.5MB), run=29619-31750msec WRITE: bw=794KiB/s (813kB/s), 193KiB/s-215KiB/s (198kB/s-220kB/s), io=24.6MiB (25.8MB), run=29619-31750msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179405: Sat Aug 15 00:07:06 2026 read: IOPS=8, BW=140KiB/s (143kB/s)(5920KiB/42435msec) clat (msec): min=8, max=275, avg=46.45, stdev=37.48 lat (msec): min=8, max=275, avg=46.45, stdev=37.48 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 12], 10.00th=[ 15], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 29], 50.00th=[ 33], 60.00th=[ 41], | 70.00th=[ 50], 80.00th=[ 66], 90.00th=[ 101], 95.00th=[ 131], | 99.00th=[ 167], 99.50th=[ 199], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 31, max= 414, per=25.26%, avg=141.21, stdev=82.94, samples=81 iops : min= 1, max= 25, avg= 8.01, stdev= 5.20, samples=81 write: IOPS=9, BW=150KiB/s (154kB/s)(6368KiB/42435msec); 0 zone resets clat (msec): min=12, max=234, avg=63.28, stdev=38.15 lat (msec): min=12, max=234, avg=63.29, stdev=38.15 clat percentiles (msec): | 1.00th=[ 18], 5.00th=[ 23], 10.00th=[ 27], 20.00th=[ 33], | 30.00th=[ 39], 40.00th=[ 44], 50.00th=[ 52], 60.00th=[ 62], | 70.00th=[ 73], 80.00th=[ 92], 90.00th=[ 117], 95.00th=[ 140], | 99.00th=[ 190], 99.50th=[ 222], 99.90th=[ 234], 99.95th=[ 234], | 99.99th=[ 234] bw ( KiB/s): min= 31, max= 351, per=25.38%, avg=149.51, stdev=80.44, samples=83 iops : min= 1, max= 21, avg= 8.54, stdev= 5.08, samples=83 lat (msec) : 10=0.91%, 20=10.55%, 50=47.27%, 100=28.13%, 250=13.02% lat (msec) : 500=0.13% cpu : usr=0.07%, sys=2.52%, ctx=1277, 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=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=179406: Sat Aug 15 00:07:06 2026 read: IOPS=8, BW=136KiB/s (139kB/s)(5744KiB/42167msec) clat (msec): min=8, max=231, avg=45.94, stdev=37.30 lat (msec): min=8, max=231, avg=45.94, stdev=37.30 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 21], | 30.00th=[ 24], 40.00th=[ 28], 50.00th=[ 32], 60.00th=[ 39], | 70.00th=[ 51], 80.00th=[ 67], 90.00th=[ 96], 95.00th=[ 133], | 99.00th=[ 180], 99.50th=[ 232], 99.90th=[ 232], 99.95th=[ 232], | 99.99th=[ 232] bw ( KiB/s): min= 30, max= 382, per=25.03%, avg=139.94, stdev=75.85, samples=81 iops : min= 1, max= 23, avg= 7.94, stdev= 4.79, samples=81 write: IOPS=9, BW=155KiB/s (159kB/s)(6544KiB/42167msec); 0 zone resets clat (msec): min=16, max=284, avg=62.62, stdev=37.37 lat (msec): min=16, max=284, avg=62.62, stdev=37.37 clat percentiles (msec): | 1.00th=[ 19], 5.00th=[ 24], 10.00th=[ 29], 20.00th=[ 33], | 30.00th=[ 39], 40.00th=[ 44], 50.00th=[ 51], 60.00th=[ 62], | 70.00th=[ 73], 80.00th=[ 89], 90.00th=[ 113], 95.00th=[ 134], | 99.00th=[ 178], 99.50th=[ 226], 99.90th=[ 284], 99.95th=[ 284], | 99.99th=[ 284] bw ( KiB/s): min= 31, max= 415, per=26.25%, avg=154.64, stdev=83.04, samples=83 iops : min= 1, max= 25, avg= 8.86, stdev= 5.22, samples=83 lat (msec) : 10=0.65%, 20=10.03%, 50=48.44%, 100=28.78%, 250=11.98% lat (msec) : 500=0.13% cpu : usr=0.08%, sys=2.67%, ctx=1277, 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=179407: Sat Aug 15 00:07:06 2026 read: IOPS=9, BW=149KiB/s (152kB/s)(6256KiB/42029msec) clat (msec): min=8, max=279, avg=44.77, stdev=36.84 lat (msec): min=8, max=279, avg=44.77, stdev=36.85 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 16], 20.00th=[ 20], | 30.00th=[ 24], 40.00th=[ 28], 50.00th=[ 32], 60.00th=[ 37], | 70.00th=[ 47], 80.00th=[ 59], 90.00th=[ 100], 95.00th=[ 129], | 99.00th=[ 167], 99.50th=[ 220], 99.90th=[ 279], 99.95th=[ 279], | 99.99th=[ 279] bw ( KiB/s): min= 31, max= 380, per=26.58%, avg=148.57, stdev=89.70, samples=82 iops : min= 1, max= 23, avg= 8.48, stdev= 5.65, samples=82 write: IOPS=8, BW=144KiB/s (147kB/s)(6032KiB/42029msec); 0 zone resets clat (msec): min=15, max=248, avg=64.94, stdev=40.48 lat (msec): min=15, max=248, avg=64.94, stdev=40.48 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 25], 10.00th=[ 29], 20.00th=[ 34], | 30.00th=[ 39], 40.00th=[ 44], 50.00th=[ 52], 60.00th=[ 63], | 70.00th=[ 75], 80.00th=[ 94], 90.00th=[ 118], 95.00th=[ 150], | 99.00th=[ 224], 99.50th=[ 241], 99.90th=[ 249], 99.95th=[ 249], | 99.99th=[ 249] bw ( KiB/s): min= 31, max= 351, per=24.23%, avg=142.69, stdev=73.78, samples=81 iops : min= 1, max= 21, avg= 8.11, stdev= 4.64, samples=81 lat (msec) : 10=0.91%, 20=11.59%, 50=48.05%, 100=26.56%, 250=12.76% lat (msec) : 500=0.13% cpu : usr=0.05%, sys=2.50%, ctx=1243, 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= 0: pid=179408: Sat Aug 15 00:07:06 2026 read: IOPS=8, BW=141KiB/s (144kB/s)(6032KiB/42782msec) clat (msec): min=8, max=237, avg=47.30, stdev=39.14 lat (msec): min=8, max=237, avg=47.30, stdev=39.14 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 14], 10.00th=[ 17], 20.00th=[ 20], | 30.00th=[ 23], 40.00th=[ 28], 50.00th=[ 32], 60.00th=[ 40], | 70.00th=[ 52], 80.00th=[ 75], 90.00th=[ 104], 95.00th=[ 136], | 99.00th=[ 190], 99.50th=[ 215], 99.90th=[ 239], 99.95th=[ 239], | 99.99th=[ 239] bw ( KiB/s): min= 21, max= 444, per=25.74%, avg=143.87, stdev=84.25, samples=82 iops : min= 1, max= 27, avg= 8.18, stdev= 5.35, samples=82 write: IOPS=9, BW=146KiB/s (150kB/s)(6256KiB/42782msec); 0 zone resets clat (msec): min=16, max=276, avg=63.59, stdev=39.99 lat (msec): min=16, max=276, avg=63.60, stdev=39.99 clat percentiles (msec): | 1.00th=[ 20], 5.00th=[ 24], 10.00th=[ 27], 20.00th=[ 34], | 30.00th=[ 39], 40.00th=[ 44], 50.00th=[ 50], 60.00th=[ 63], | 70.00th=[ 75], 80.00th=[ 92], 90.00th=[ 115], 95.00th=[ 144], | 99.00th=[ 209], 99.50th=[ 275], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 31, max= 447, per=25.08%, avg=147.70, stdev=86.70, samples=83 iops : min= 1, max= 27, avg= 8.43, stdev= 5.42, samples=83 lat (msec) : 10=0.52%, 20=10.42%, 50=48.83%, 100=26.95%, 250=13.02% lat (msec) : 500=0.26% cpu : usr=0.06%, sys=2.71%, ctx=1351, 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=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=560KiB/s (573kB/s), 136KiB/s-149KiB/s (139kB/s-152kB/s), io=23.4MiB (24.5MB), run=42029-42782msec WRITE: bw=589KiB/s (603kB/s), 144KiB/s-155KiB/s (147kB/s-159kB/s), io=24.6MiB (25.8MB), run=42029-42782msec 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=179420: Sat Aug 15 00:07:22 2026 read: IOPS=1, BW=1635KiB/s (1675kB/s)(7168KiB/4383msec) clat (msec): min=73, max=581, avg=235.54, stdev=167.09 lat (msec): min=73, max=581, avg=235.54, stdev=167.09 clat percentiles (msec): | 1.00th=[ 74], 5.00th=[ 74], 10.00th=[ 74], 20.00th=[ 133], | 30.00th=[ 133], 40.00th=[ 133], 50.00th=[ 239], 60.00th=[ 245], | 70.00th=[ 245], 80.00th=[ 247], 90.00th=[ 584], 95.00th=[ 584], | 99.00th=[ 584], 99.50th=[ 584], 99.90th=[ 584], 99.95th=[ 584], | 99.99th=[ 584] bw ( KiB/s): min= 2027, max= 4007, per=76.97%, avg=2988.75, stdev=1102.57, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=1, BW=1168KiB/s (1196kB/s)(5120KiB/4383msec); 0 zone resets clat (msec): min=343, max=1096, avg=540.06, stdev=315.42 lat (msec): min=343, max=1096, avg=540.21, stdev=315.38 clat percentiles (msec): | 1.00th=[ 342], 5.00th=[ 342], 10.00th=[ 342], 20.00th=[ 342], | 30.00th=[ 355], 40.00th=[ 355], 50.00th=[ 447], 60.00th=[ 447], | 70.00th=[ 460], 80.00th=[ 460], 90.00th=[ 1099], 95.00th=[ 1099], | 99.00th=[ 1099], 99.50th=[ 1099], 99.90th=[ 1099], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 1865, max= 2048, per=36.70%, avg=1994.75, stdev=86.93, samples=4 iops : min= 1, max= 2, avg= 1.25, stdev= 0.50, samples=4 lat (msec) : 100=8.33%, 250=41.67%, 500=33.33%, 750=8.33%, 2000=8.33% cpu : usr=0.02%, sys=4.27%, ctx=86, 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=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=179421: Sat Aug 15 00:07:22 2026 read: IOPS=0, BW=388KiB/s (398kB/s)(2048KiB/5274msec) clat (msec): min=137, max=155, avg=146.45, stdev=13.35 lat (msec): min=137, max=155, avg=146.45, stdev=13.35 clat percentiles (msec): | 1.00th=[ 138], 5.00th=[ 138], 10.00th=[ 138], 20.00th=[ 138], | 30.00th=[ 138], 40.00th=[ 138], 50.00th=[ 138], 60.00th=[ 157], | 70.00th=[ 157], 80.00th=[ 157], 90.00th=[ 157], 95.00th=[ 157], | 99.00th=[ 157], 99.50th=[ 157], 99.90th=[ 157], 99.95th=[ 157], | 99.99th=[ 157] bw ( KiB/s): min= 1980, max= 2048, per=51.87%, avg=2014.00, stdev=48.08, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 write: IOPS=1, BW=1942KiB/s (1988kB/s)(10.0MiB/5274msec); 0 zone resets clat (msec): min=191, max=1195, avg=479.52, stdev=386.32 lat (msec): min=191, max=1197, avg=480.38, stdev=386.39 clat percentiles (msec): | 1.00th=[ 192], 5.00th=[ 192], 10.00th=[ 192], 20.00th=[ 197], | 30.00th=[ 199], 40.00th=[ 253], 50.00th=[ 279], 60.00th=[ 334], | 70.00th=[ 359], 80.00th=[ 659], 90.00th=[ 1133], 95.00th=[ 1200], | 99.00th=[ 1200], 99.50th=[ 1200], 99.90th=[ 1200], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 1980, max= 4087, per=55.40%, avg=3011.33, stdev=1099.49, samples=6 iops : min= 1, max= 3, avg= 2.17, stdev= 0.98, samples=6 lat (msec) : 250=41.67%, 500=33.33%, 750=8.33%, 2000=16.67% cpu : usr=0.00%, sys=5.08%, ctx=91, 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=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=179422: Sat Aug 15 00:07:22 2026 read: IOPS=1, BW=1189KiB/s (1217kB/s)(6144KiB/5168msec) clat (msec): min=83, max=829, avg=347.33, stdev=280.47 lat (msec): min=83, max=829, avg=347.34, stdev=280.47 clat percentiles (msec): | 1.00th=[ 85], 5.00th=[ 85], 10.00th=[ 85], 20.00th=[ 155], | 30.00th=[ 155], 40.00th=[ 165], 50.00th=[ 165], 60.00th=[ 359], | 70.00th=[ 493], 80.00th=[ 493], 90.00th=[ 827], 95.00th=[ 827], | 99.00th=[ 827], 99.50th=[ 827], 99.90th=[ 827], 99.95th=[ 827], | 99.99th=[ 827] bw ( KiB/s): min= 1865, max= 2039, per=50.89%, avg=1976.20, stdev=75.28, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 write: IOPS=1, BW=1189KiB/s (1217kB/s)(6144KiB/5168msec); 0 zone resets clat (msec): min=303, max=773, avg=500.19, stdev=167.14 lat (msec): min=303, max=773, avg=500.26, stdev=167.14 clat percentiles (msec): | 1.00th=[ 305], 5.00th=[ 305], 10.00th=[ 305], 20.00th=[ 376], | 30.00th=[ 376], 40.00th=[ 472], 50.00th=[ 472], 60.00th=[ 477], | 70.00th=[ 600], 80.00th=[ 600], 90.00th=[ 776], 95.00th=[ 776], | 99.00th=[ 776], 99.50th=[ 776], 99.90th=[ 776], 99.95th=[ 776], | 99.99th=[ 776] bw ( KiB/s): min= 1865, max= 2048, per=36.67%, avg=1993.50, stdev=75.94, samples=6 iops : min= 1, max= 2, avg= 1.17, stdev= 0.41, samples=6 lat (msec) : 100=8.33%, 250=16.67%, 500=50.00%, 750=8.33%, 1000=16.67% cpu : usr=0.00%, sys=4.32%, ctx=147, 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=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=179424: Sat Aug 15 00:07:22 2026 read: IOPS=1, BW=1130KiB/s (1158kB/s)(5120KiB/4529msec) clat (msec): min=143, max=689, avg=400.29, stdev=233.65 lat (msec): min=143, max=689, avg=400.29, stdev=233.65 clat percentiles (msec): | 1.00th=[ 144], 5.00th=[ 144], 10.00th=[ 144], 20.00th=[ 144], | 30.00th=[ 180], 40.00th=[ 180], 50.00th=[ 456], 60.00th=[ 456], | 70.00th=[ 531], 80.00th=[ 531], 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= 1865, max= 4096, per=68.37%, avg=2654.67, stdev=1250.14, samples=3 iops : min= 1, max= 4, avg= 2.00, stdev= 1.73, samples=3 write: IOPS=1, BW=1583KiB/s (1621kB/s)(7168KiB/4529msec); 0 zone resets clat (msec): min=104, max=614, avg=328.01, stdev=189.10 lat (msec): min=104, max=614, avg=328.08, stdev=189.10 clat percentiles (msec): | 1.00th=[ 105], 5.00th=[ 105], 10.00th=[ 105], 20.00th=[ 169], | 30.00th=[ 176], 40.00th=[ 176], 50.00th=[ 321], 60.00th=[ 451], | 70.00th=[ 451], 80.00th=[ 464], 90.00th=[ 617], 95.00th=[ 617], | 99.00th=[ 617], 99.50th=[ 617], 99.90th=[ 617], 99.95th=[ 617], | 99.99th=[ 617] bw ( KiB/s): min= 1865, max= 4055, per=43.19%, avg=2348.00, stdev=839.25, samples=6 iops : min= 1, max= 3, avg= 1.33, stdev= 0.82, samples=6 lat (msec) : 250=41.67%, 500=33.33%, 750=25.00% cpu : usr=0.00%, sys=3.31%, ctx=66, 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=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=3883KiB/s (3976kB/s), 388KiB/s-1635KiB/s (398kB/s-1675kB/s), io=20.0MiB (20.0MB), run=4383-5274msec WRITE: bw=5436KiB/s (5567kB/s), 1168KiB/s-1942KiB/s (1196kB/s-1988kB/s), io=28.0MiB (29.4MB), run=4383-5274msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179425: Sat Aug 15 00:07:22 2026 read: IOPS=2, BW=2171KiB/s (2224kB/s)(7168KiB/3301msec) clat (usec): min=537, max=362165, avg=149043.44, stdev=160645.93 lat (usec): min=539, max=362168, avg=149044.70, stdev=160646.21 clat percentiles (usec): | 1.00th=[ 537], 5.00th=[ 537], 10.00th=[ 537], 20.00th=[ 725], | 30.00th=[ 5866], 40.00th=[ 5866], 50.00th=[ 90702], 60.00th=[270533], | 70.00th=[270533], 80.00th=[312476], 90.00th=[362808], 95.00th=[362808], | 99.00th=[362808], 99.50th=[362808], 99.90th=[362808], 99.95th=[362808], | 99.99th=[362808] bw ( KiB/s): min= 1935, max= 4039, per=77.16%, avg=2996.00, stdev=1186.27, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=1, BW=1551KiB/s (1588kB/s)(5120KiB/3301msec); 0 zone resets clat (msec): min=190, max=735, avg=344.56, stdev=225.96 lat (msec): min=190, max=735, avg=344.63, stdev=225.98 clat percentiles (msec): | 1.00th=[ 190], 5.00th=[ 190], 10.00th=[ 190], 20.00th=[ 190], | 30.00th=[ 192], 40.00th=[ 192], 50.00th=[ 284], 60.00th=[ 284], | 70.00th=[ 326], 80.00th=[ 326], 90.00th=[ 735], 95.00th=[ 735], | 99.00th=[ 735], 99.50th=[ 735], 99.90th=[ 735], 99.95th=[ 735], | 99.99th=[ 735] bw ( KiB/s): min= 2003, max= 4007, per=49.36%, avg=2683.00, stdev=1146.76, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=16.67% lat (msec) : 10=8.33%, 100=8.33%, 250=16.67%, 500=41.67%, 750=8.33% cpu : usr=0.06%, sys=12.76%, ctx=318, 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=179426: Sat Aug 15 00:07:22 2026 read: IOPS=0, BW=388KiB/s (398kB/s)(2048KiB/5274msec) clat (usec): min=423, max=269692, avg=135058.12, stdev=190402.03 lat (usec): min=424, max=269695, avg=135059.88, stdev=190403.04 clat percentiles (usec): | 1.00th=[ 424], 5.00th=[ 424], 10.00th=[ 424], 20.00th=[ 424], | 30.00th=[ 424], 40.00th=[ 424], 50.00th=[ 424], 60.00th=[270533], | 70.00th=[270533], 80.00th=[270533], 90.00th=[270533], 95.00th=[270533], | 99.00th=[270533], 99.50th=[270533], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 1787, max= 2019, per=49.01%, avg=1903.00, stdev=164.05, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1942KiB/s (1988kB/s)(10.0MiB/5274msec); 0 zone resets clat (msec): min=142, max=1037, avg=444.95, stdev=310.45 lat (msec): min=142, max=1037, avg=445.91, stdev=311.17 clat percentiles (msec): | 1.00th=[ 142], 5.00th=[ 142], 10.00th=[ 142], 20.00th=[ 188], | 30.00th=[ 253], 40.00th=[ 275], 50.00th=[ 288], 60.00th=[ 300], | 70.00th=[ 380], 80.00th=[ 760], 90.00th=[ 827], 95.00th=[ 1036], | 99.00th=[ 1036], 99.50th=[ 1036], 99.90th=[ 1036], 99.95th=[ 1036], | 99.99th=[ 1036] bw ( KiB/s): min= 1787, max= 6047, per=71.95%, avg=3911.00, stdev=2331.61, samples=4 iops : min= 1, max= 5, avg= 3.00, stdev= 2.31, samples=4 lat (usec) : 500=8.33% lat (msec) : 250=16.67%, 500=50.00%, 1000=16.67%, 2000=8.33% cpu : usr=0.02%, sys=12.54%, ctx=152, 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=179427: Sat Aug 15 00:07:22 2026 read: IOPS=1, BW=1323KiB/s (1355kB/s)(6144KiB/4644msec) clat (msec): min=2, max=386, avg=198.09, stdev=126.87 lat (msec): min=2, max=386, avg=198.09, stdev=126.87 clat percentiles (msec): | 1.00th=[ 3], 5.00th=[ 3], 10.00th=[ 3], 20.00th=[ 148], | 30.00th=[ 148], 40.00th=[ 176], 50.00th=[ 176], 60.00th=[ 226], | 70.00th=[ 253], 80.00th=[ 253], 90.00th=[ 388], 95.00th=[ 388], | 99.00th=[ 388], 99.50th=[ 388], 99.90th=[ 388], 99.95th=[ 388], | 99.99th=[ 388] bw ( KiB/s): min= 2003, max= 3574, per=62.01%, avg=2407.75, stdev=777.64, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=1, BW=1323KiB/s (1355kB/s)(6144KiB/4644msec); 0 zone resets clat (msec): min=190, max=1149, avg=533.92, stdev=366.77 lat (msec): min=190, max=1149, avg=534.06, stdev=366.81 clat percentiles (msec): | 1.00th=[ 190], 5.00th=[ 190], 10.00th=[ 190], 20.00th=[ 257], | 30.00th=[ 257], 40.00th=[ 288], 50.00th=[ 288], 60.00th=[ 600], | 70.00th=[ 718], 80.00th=[ 718], 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= 1622, max= 2039, per=34.58%, avg=1879.60, stdev=174.46, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 4=8.33%, 250=33.33%, 500=33.33%, 750=16.67%, 2000=8.33% cpu : usr=0.00%, sys=12.51%, ctx=307, 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=179428: Sat Aug 15 00:07:22 2026 read: IOPS=1, BW=1216KiB/s (1245kB/s)(5120KiB/4212msec) clat (usec): min=1060, max=301285, avg=161121.69, stdev=143407.68 lat (usec): min=1061, max=301287, avg=161122.90, stdev=143407.81 clat percentiles (usec): | 1.00th=[ 1057], 5.00th=[ 1057], 10.00th=[ 1057], 20.00th=[ 1057], | 30.00th=[ 10945], 40.00th=[ 10945], 50.00th=[246416], 60.00th=[246416], | 70.00th=[246416], 80.00th=[246416], 90.00th=[299893], 95.00th=[299893], | 99.00th=[299893], 99.50th=[299893], 99.90th=[299893], 99.95th=[299893], | 99.99th=[299893] bw ( KiB/s): min= 4007, max= 4007, per=100.00%, avg=4007.00, stdev= 0.00, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1702KiB/s (1743kB/s)(7168KiB/4212msec); 0 zone resets clat (msec): min=267, max=892, avg=466.21, stdev=214.35 lat (msec): min=270, max=893, avg=466.76, stdev=214.13 clat percentiles (msec): | 1.00th=[ 268], 5.00th=[ 268], 10.00th=[ 268], 20.00th=[ 326], | 30.00th=[ 342], 40.00th=[ 342], 50.00th=[ 393], 60.00th=[ 464], | 70.00th=[ 464], 80.00th=[ 584], 90.00th=[ 894], 95.00th=[ 894], | 99.00th=[ 894], 99.50th=[ 894], 99.90th=[ 894], 99.95th=[ 894], | 99.99th=[ 894] bw ( KiB/s): min= 1577, max= 4079, per=43.52%, avg=2365.50, stdev=1156.51, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 2=8.33%, 20=8.33%, 250=16.67%, 500=50.00%, 750=8.33% lat (msec) : 1000=8.33% cpu : usr=0.00%, sys=12.92%, ctx=216, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3883KiB/s (3976kB/s), 388KiB/s-2171KiB/s (398kB/s-2224kB/s), io=20.0MiB (20.0MB), run=3301-5274msec WRITE: bw=5436KiB/s (5567kB/s), 1323KiB/s-1942KiB/s (1355kB/s-1988kB/s), io=28.0MiB (29.4MB), run=3301-5274msec 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=179436: Sat Aug 15 00:07:35 2026 read: IOPS=0, BW=3972KiB/s (4067kB/s)(12.0MiB/3094msec) clat (msec): min=569, max=1788, avg=1007.07, stdev=678.63 lat (msec): min=569, max=1788, avg=1007.07, stdev=678.64 clat percentiles (msec): | 1.00th=[ 567], 5.00th=[ 567], 10.00th=[ 567], 20.00th=[ 567], | 30.00th=[ 567], 40.00th=[ 667], 50.00th=[ 667], 60.00th=[ 667], | 70.00th=[ 1787], 80.00th=[ 1787], 90.00th=[ 1787], 95.00th=[ 1787], | 99.00th=[ 1787], 99.50th=[ 1787], 99.90th=[ 1787], 99.95th=[ 1787], | 99.99th=[ 1787] bw ( KiB/s): min= 7366, max= 8175, per=100.00%, avg=7770.50, stdev=572.05, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.00%, sys=4.14%, ctx=58, 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=179438: Sat Aug 15 00:07:35 2026 read: IOPS=0, BW=1833KiB/s (1877kB/s)(4096KiB/2234msec) clat (nsec): min=1180.3M, max=1180.3M, avg=1180303496.00, stdev= 0.00 lat (nsec): min=1180.3M, max=1180.3M, avg=1180306526.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1183], 5.00th=[ 1183], 10.00th=[ 1183], 20.00th=[ 1183], | 30.00th=[ 1183], 40.00th=[ 1183], 50.00th=[ 1183], 60.00th=[ 1183], | 70.00th=[ 1183], 80.00th=[ 1183], 90.00th=[ 1183], 95.00th=[ 1183], | 99.00th=[ 1183], 99.50th=[ 1183], 99.90th=[ 1183], 99.95th=[ 1183], | 99.99th=[ 1183] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3667KiB/s (3755kB/s)(8192KiB/2234msec); 0 zone resets clat (msec): min=455, max=546, avg=501.14, stdev=63.87 lat (msec): min=456, max=546, avg=501.44, stdev=63.87 clat percentiles (msec): | 1.00th=[ 456], 5.00th=[ 456], 10.00th=[ 456], 20.00th=[ 456], | 30.00th=[ 456], 40.00th=[ 456], 50.00th=[ 456], 60.00th=[ 550], | 70.00th=[ 550], 80.00th=[ 550], 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= 8175, max= 8175, per=84.68%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=5.55%, ctx=43, 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=179440: Sat Aug 15 00:07:35 2026 write: IOPS=0, BW=3621KiB/s (3707kB/s)(12.0MiB/3394msec); 0 zone resets clat (msec): min=331, max=2265, avg=1104.77, stdev=1023.74 lat (msec): min=331, max=2266, avg=1105.52, stdev=1023.48 clat percentiles (msec): | 1.00th=[ 334], 5.00th=[ 334], 10.00th=[ 334], 20.00th=[ 334], | 30.00th=[ 334], 40.00th=[ 718], 50.00th=[ 718], 60.00th=[ 718], | 70.00th=[ 2265], 80.00th=[ 2265], 90.00th=[ 2265], 95.00th=[ 2265], | 99.00th=[ 2265], 99.50th=[ 2265], 99.90th=[ 2265], 99.95th=[ 2265], | 99.99th=[ 2265] bw ( KiB/s): min= 7366, max= 7968, per=79.42%, avg=7667.00, stdev=425.68, 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=0.03%, sys=5.28%, ctx=61, 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=179442: Sat Aug 15 00:07:35 2026 write: IOPS=0, BW=3941KiB/s (4036kB/s)(12.0MiB/3118msec); 0 zone resets clat (msec): min=604, max=1863, avg=1025.80, stdev=725.13 lat (msec): min=611, max=1863, avg=1028.74, stdev=722.87 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=[ 609], | 70.00th=[ 1871], 80.00th=[ 1871], 90.00th=[ 1871], 95.00th=[ 1871], | 99.00th=[ 1871], 99.50th=[ 1871], 99.90th=[ 1871], 99.95th=[ 1871], | 99.99th=[ 1871] bw ( KiB/s): min= 8159, max= 8175, per=84.60%, avg=8167.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.00%, sys=5.33%, ctx=55, 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=5295KiB/s (5423kB/s), 1833KiB/s-3972KiB/s (1877kB/s-4067kB/s), io=16.0MiB (16.8MB), run=2234-3094msec WRITE: bw=9655KiB/s (9886kB/s), 3621KiB/s-3941KiB/s (3707kB/s-4036kB/s), io=32.0MiB (33.6MB), run=2234-3394msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179435: Sat Aug 15 00:07:35 2026 read: IOPS=1, BW=5382KiB/s (5512kB/s)(12.0MiB/2283msec) clat (msec): min=622, max=756, avg=688.96, stdev=67.13 lat (msec): min=622, max=756, avg=688.96, stdev=67.13 clat percentiles (msec): | 1.00th=[ 625], 5.00th=[ 625], 10.00th=[ 625], 20.00th=[ 625], | 30.00th=[ 625], 40.00th=[ 684], 50.00th=[ 684], 60.00th=[ 684], | 70.00th=[ 760], 80.00th=[ 760], 90.00th=[ 760], 95.00th=[ 760], | 99.00th=[ 760], 99.50th=[ 760], 99.90th=[ 760], 99.95th=[ 760], | 99.99th=[ 760] bw ( KiB/s): min= 8094, max= 8175, per=100.00%, avg=8134.50, stdev=57.28, 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=15.43%, ctx=387, 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=179437: Sat Aug 15 00:07:35 2026 read: IOPS=0, BW=2059KiB/s (2109kB/s)(4096KiB/1989msec) clat (nsec): min=766377k, max=766377k, avg=766376639.00, stdev= 0.00 lat (nsec): min=766378k, max=766378k, avg=766378107.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 768], 5.00th=[ 768], 10.00th=[ 768], 20.00th=[ 768], | 30.00th=[ 768], 40.00th=[ 768], 50.00th=[ 768], 60.00th=[ 768], | 70.00th=[ 768], 80.00th=[ 768], 90.00th=[ 768], 95.00th=[ 768], | 99.00th=[ 768], 99.50th=[ 768], 99.90th=[ 768], 99.95th=[ 768], | 99.99th=[ 768] 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=1, BW=4119KiB/s (4218kB/s)(8192KiB/1989msec); 0 zone resets clat (msec): min=510, max=644, avg=577.72, stdev=94.76 lat (msec): min=511, max=645, avg=578.17, stdev=94.55 clat percentiles (msec): | 1.00th=[ 510], 5.00th=[ 510], 10.00th=[ 510], 20.00th=[ 510], | 30.00th=[ 510], 40.00th=[ 510], 50.00th=[ 510], 60.00th=[ 642], | 70.00th=[ 642], 80.00th=[ 642], 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= 8175, max= 8175, per=88.32%, avg=8175.00, 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=10.41%, ctx=154, 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=179439: Sat Aug 15 00:07:35 2026 write: IOPS=0, BW=3471KiB/s (3554kB/s)(12.0MiB/3540msec); 0 zone resets clat (msec): min=269, max=2754, avg=1162.16, stdev=1382.44 lat (msec): min=269, max=2754, avg=1162.63, stdev=1382.32 clat percentiles (msec): | 1.00th=[ 271], 5.00th=[ 271], 10.00th=[ 271], 20.00th=[ 271], | 30.00th=[ 271], 40.00th=[ 464], 50.00th=[ 464], 60.00th=[ 464], | 70.00th=[ 2769], 80.00th=[ 2769], 90.00th=[ 2769], 95.00th=[ 2769], | 99.00th=[ 2769], 99.50th=[ 2769], 99.90th=[ 2769], 99.95th=[ 2769], | 99.99th=[ 2769] bw ( KiB/s): min= 7953, max= 7953, per=85.92%, avg=7953.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=4.80%, ctx=66, 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=179441: Sat Aug 15 00:07:35 2026 write: IOPS=1, BW=4609KiB/s (4720kB/s)(12.0MiB/2666msec); 0 zone resets clat (msec): min=219, max=1901, avg=851.64, stdev=915.21 lat (msec): min=220, max=1901, avg=851.89, stdev=915.16 clat percentiles (msec): | 1.00th=[ 220], 5.00th=[ 220], 10.00th=[ 220], 20.00th=[ 220], | 30.00th=[ 220], 40.00th=[ 435], 50.00th=[ 435], 60.00th=[ 435], | 70.00th=[ 1905], 80.00th=[ 1905], 90.00th=[ 1905], 95.00th=[ 1905], | 99.00th=[ 1905], 99.50th=[ 1905], 99.90th=[ 1905], 99.95th=[ 1905], | 99.99th=[ 1905] bw ( KiB/s): min= 5868, max= 8110, per=75.51%, avg=6989.00, stdev=1585.33, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 250=33.33%, 500=33.33%, 2000=33.33% cpu : usr=0.00%, sys=7.09%, ctx=63, 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=7177KiB/s (7349kB/s), 2059KiB/s-5382KiB/s (2109kB/s-5512kB/s), io=16.0MiB (16.8MB), run=1989-2283msec WRITE: bw=9256KiB/s (9479kB/s), 3471KiB/s-4609KiB/s (3554kB/s-4720kB/s), io=32.0MiB (33.6MB), run=1989-3540msec