== sanity test 398b: DIO and buffer IO race ============== 18:57:39 (1784588259) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.07083 s, 8.3 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=144189: Mon Jul 20 19:00:31 2026 read: IOPS=9, BW=38.9KiB/s (39.9kB/s)(5992KiB/153840msec) clat (usec): min=32, max=731808, avg=49799.58, stdev=41406.19 lat (usec): min=32, max=731811, avg=49803.14, stdev=41405.17 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 68], 10.00th=[ 11600], 20.00th=[ 22938], | 30.00th=[ 30016], 40.00th=[ 34866], 50.00th=[ 42206], 60.00th=[ 49546], | 70.00th=[ 58983], 80.00th=[ 72877], 90.00th=[ 92799], 95.00th=[114820], | 99.00th=[185598], 99.50th=[208667], 99.90th=[383779], 99.95th=[734004], | 99.99th=[734004] bw ( KiB/s): min= 7, max= 102, per=25.21%, avg=39.08, stdev=18.05, samples=297 iops : min= 1, max= 25, avg= 9.09, stdev= 4.55, samples=297 write: IOPS=10, BW=40.9KiB/s (41.9kB/s)(6296KiB/153840msec); 0 zone resets clat (usec): min=1175, max=811441, avg=50017.99, stdev=55530.34 lat (usec): min=1176, max=811443, avg=50033.46, stdev=55523.56 clat percentiles (usec): | 1.00th=[ 1287], 5.00th=[ 1450], 10.00th=[ 1975], 20.00th=[ 5669], | 30.00th=[ 11207], 40.00th=[ 22414], 50.00th=[ 36963], 60.00th=[ 50070], | 70.00th=[ 64750], 80.00th=[ 84411], 90.00th=[112722], 95.00th=[143655], | 99.00th=[229639], 99.50th=[295699], 99.90th=[484443], 99.95th=[809501], | 99.99th=[809501] bw ( KiB/s): min= 7, max= 126, per=25.26%, avg=40.92, stdev=19.83, samples=298 iops : min= 1, max= 31, avg= 9.55, stdev= 4.99, samples=298 lat (usec) : 50=0.29%, 100=3.65%, 250=0.36%, 500=0.03%, 750=0.10% lat (msec) : 2=5.18%, 4=3.16%, 10=6.38%, 20=8.04%, 50=33.17% lat (msec) : 100=28.91%, 250=10.16%, 500=0.52%, 750=0.03%, 1000=0.03% cpu : usr=0.08%, sys=4.72%, ctx=6587, 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=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=144190: Mon Jul 20 19:00:31 2026 read: IOPS=9, BW=38.5KiB/s (39.4kB/s)(5940KiB/154249msec) clat (usec): min=30, max=793381, avg=51225.96, stdev=46435.95 lat (usec): min=30, max=793382, avg=51229.53, stdev=46434.44 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 72], 10.00th=[ 13042], 20.00th=[ 23725], | 30.00th=[ 30540], 40.00th=[ 35914], 50.00th=[ 42730], 60.00th=[ 49546], | 70.00th=[ 59507], 80.00th=[ 74974], 90.00th=[ 96994], 95.00th=[119014], | 99.00th=[181404], 99.50th=[252707], 99.90th=[700449], 99.95th=[792724], | 99.99th=[792724] bw ( KiB/s): min= 7, max= 120, per=24.85%, avg=38.52, stdev=19.62, samples=298 iops : min= 1, max= 30, avg= 8.96, stdev= 4.95, samples=298 write: IOPS=10, BW=41.2KiB/s (42.1kB/s)(6348KiB/154249msec); 0 zone resets clat (usec): min=1177, max=811443, avg=48955.75, stdev=54457.05 lat (usec): min=1178, max=811444, avg=48960.86, stdev=54458.13 clat percentiles (usec): | 1.00th=[ 1303], 5.00th=[ 1483], 10.00th=[ 2089], 20.00th=[ 5538], | 30.00th=[ 10683], 40.00th=[ 20579], 50.00th=[ 35390], 60.00th=[ 47973], | 70.00th=[ 65799], 80.00th=[ 83362], 90.00th=[116917], 95.00th=[147850], | 99.00th=[210764], 99.50th=[263193], 99.90th=[599786], 99.95th=[809501], | 99.99th=[809501] bw ( KiB/s): min= 7, max= 127, per=25.35%, avg=41.06, stdev=21.19, samples=298 iops : min= 1, max= 31, avg= 9.59, stdev= 5.32, samples=298 lat (usec) : 50=0.26%, 100=3.39%, 250=0.46%, 500=0.10%, 750=0.07% lat (usec) : 1000=0.03% lat (msec) : 2=5.01%, 4=3.35%, 10=6.64%, 20=8.85%, 50=32.39% lat (msec) : 100=27.70%, 250=11.20%, 500=0.42%, 750=0.07%, 1000=0.07% cpu : usr=0.09%, sys=4.81%, ctx=6636, majf=0, minf=19 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=144191: Mon Jul 20 19:00:31 2026 read: IOPS=9, BW=39.7KiB/s (40.7kB/s)(6028KiB/151809msec) clat (usec): min=36, max=396986, avg=47860.95, stdev=36457.37 lat (usec): min=36, max=396987, avg=47864.38, stdev=36459.19 clat percentiles (usec): | 1.00th=[ 53], 5.00th=[ 64], 10.00th=[ 11600], 20.00th=[ 22152], | 30.00th=[ 28443], 40.00th=[ 34866], 50.00th=[ 41157], 60.00th=[ 47973], | 70.00th=[ 57410], 80.00th=[ 70779], 90.00th=[ 89654], 95.00th=[109577], | 99.00th=[183501], 99.50th=[225444], 99.90th=[261096], 99.95th=[396362], | 99.99th=[396362] bw ( KiB/s): min= 7, max= 95, per=25.69%, avg=39.83, stdev=20.49, samples=293 iops : min= 1, max= 23, avg= 9.28, stdev= 5.17, samples=293 write: IOPS=10, BW=41.2KiB/s (42.2kB/s)(6260KiB/151809msec); 0 zone resets clat (usec): min=1151, max=1059.8k, avg=50602.75, stdev=63205.09 lat (usec): min=1152, max=1059.8k, avg=50607.49, stdev=63203.86 clat percentiles (usec): | 1.00th=[ 1254], 5.00th=[ 1434], 10.00th=[ 1991], | 20.00th=[ 5145], 30.00th=[ 11731], 40.00th=[ 22676], | 50.00th=[ 35390], 60.00th=[ 48497], 70.00th=[ 64226], | 80.00th=[ 84411], 90.00th=[ 115868], 95.00th=[ 145753], | 99.00th=[ 227541], 99.50th=[ 304088], 99.90th=[ 792724], | 99.95th=[1061159], 99.99th=[1061159] bw ( KiB/s): min= 7, max= 110, per=25.45%, avg=41.23, stdev=19.86, samples=294 iops : min= 1, max= 27, avg= 9.63, stdev= 5.01, samples=294 lat (usec) : 50=0.23%, 100=3.91%, 250=0.20%, 500=0.13%, 750=0.03% lat (usec) : 1000=0.03% lat (msec) : 2=5.11%, 4=3.55%, 10=5.57%, 20=8.89%, 50=34.08% lat (msec) : 100=27.44%, 250=10.35%, 500=0.33%, 750=0.10%, 1000=0.03% lat (msec) : 2000=0.03% cpu : usr=0.08%, sys=4.79%, ctx=6555, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144192: Mon Jul 20 19:00:31 2026 read: IOPS=9, BW=39.5KiB/s (40.4kB/s)(6052KiB/153318msec) clat (usec): min=30, max=503942, avg=49731.48, stdev=38224.71 lat (usec): min=31, max=503943, avg=49733.02, stdev=38224.68 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 67], 10.00th=[ 12518], 20.00th=[ 23462], | 30.00th=[ 28967], 40.00th=[ 34866], 50.00th=[ 41681], 60.00th=[ 49546], | 70.00th=[ 60556], 80.00th=[ 73925], 90.00th=[ 92799], 95.00th=[115868], | 99.00th=[166724], 99.50th=[193987], 99.90th=[408945], 99.95th=[505414], | 99.99th=[505414] bw ( KiB/s): min= 7, max= 103, per=25.35%, avg=39.29, stdev=19.49, samples=298 iops : min= 1, max= 25, avg= 9.14, stdev= 4.91, samples=298 write: IOPS=10, BW=40.7KiB/s (41.6kB/s)(6236KiB/153318msec); 0 zone resets clat (usec): min=1093, max=775842, avg=49765.09, stdev=53714.83 lat (usec): min=1094, max=775844, avg=49772.93, stdev=53716.06 clat percentiles (usec): | 1.00th=[ 1287], 5.00th=[ 1483], 10.00th=[ 2343], 20.00th=[ 6325], | 30.00th=[ 12125], 40.00th=[ 22676], 50.00th=[ 35390], 60.00th=[ 49021], | 70.00th=[ 62653], 80.00th=[ 84411], 90.00th=[116917], 95.00th=[147850], | 99.00th=[238027], 99.50th=[274727], 99.90th=[354419], 99.95th=[775947], | 99.99th=[775947] bw ( KiB/s): min= 7, max= 126, per=24.82%, avg=40.20, stdev=19.01, samples=299 iops : min= 1, max= 31, avg= 9.38, stdev= 4.79, samples=299 lat (usec) : 50=0.46%, 100=3.45%, 250=0.39%, 500=0.10%, 1000=0.10% lat (msec) : 2=4.69%, 4=2.57%, 10=6.54%, 20=8.66%, 50=33.59% lat (msec) : 100=27.80%, 250=11.23%, 500=0.36%, 750=0.03%, 1000=0.03% cpu : usr=0.08%, sys=4.91%, ctx=6611, majf=0, minf=19 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=156KiB/s (159kB/s), 38.5KiB/s-39.7KiB/s (39.4kB/s-40.7kB/s), io=23.4MiB (24.6MB), run=151809-154249msec WRITE: bw=163KiB/s (167kB/s), 40.7KiB/s-41.2KiB/s (41.6kB/s-42.2kB/s), io=24.6MiB (25.7MB), run=151809-154249msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144194: Mon Jul 20 19:03:02 2026 read: IOPS=4, BW=19.7KiB/s (20.2kB/s)(5992KiB/304402msec) clat (msec): min=5, max=860, avg=41.86, stdev=44.51 lat (msec): min=5, max=860, avg=41.86, stdev=44.51 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 29], 60.00th=[ 34], | 70.00th=[ 43], 80.00th=[ 57], 90.00th=[ 92], 95.00th=[ 123], | 99.00th=[ 207], 99.50th=[ 241], 99.90th=[ 330], 99.95th=[ 860], | 99.99th=[ 860] bw ( KiB/s): min= 7, max= 87, per=29.51%, avg=23.02, stdev=15.76, samples=502 iops : min= 1, max= 21, avg= 5.14, stdev= 3.99, samples=502 write: IOPS=5, BW=20.7KiB/s (21.2kB/s)(6296KiB/304402msec); 0 zone resets clat (msec): min=44, max=1044, avg=153.46, stdev=86.55 lat (msec): min=44, max=1044, avg=153.46, stdev=86.55 clat percentiles (msec): | 1.00th=[ 55], 5.00th=[ 68], 10.00th=[ 79], 20.00th=[ 91], | 30.00th=[ 104], 40.00th=[ 115], 50.00th=[ 126], 60.00th=[ 142], | 70.00th=[ 167], 80.00th=[ 205], 90.00th=[ 275], 95.00th=[ 326], | 99.00th=[ 426], 99.50th=[ 489], 99.90th=[ 852], 99.95th=[ 1045], | 99.99th=[ 1045] bw ( KiB/s): min= 7, max= 48, per=25.30%, avg=20.74, stdev=10.30, samples=582 iops : min= 1, max= 12, avg= 4.55, stdev= 2.63, samples=582 lat (msec) : 10=1.82%, 20=13.96%, 50=21.19%, 100=22.07%, 250=34.31% lat (msec) : 500=6.38%, 750=0.16%, 1000=0.07%, 2000=0.03% cpu : usr=0.04%, sys=1.32%, ctx=5534, majf=0, minf=15 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144195: Mon Jul 20 19:03:02 2026 read: IOPS=4, BW=19.5KiB/s (19.9kB/s)(5940KiB/305077msec) clat (msec): min=5, max=885, avg=41.45, stdev=47.06 lat (msec): min=5, max=885, avg=41.46, stdev=47.06 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 34], | 70.00th=[ 42], 80.00th=[ 56], 90.00th=[ 89], 95.00th=[ 118], | 99.00th=[ 211], 99.50th=[ 284], 99.90th=[ 435], 99.95th=[ 885], | 99.99th=[ 885] bw ( KiB/s): min= 7, max= 87, per=29.49%, avg=23.00, stdev=15.54, samples=497 iops : min= 1, max= 21, avg= 5.13, stdev= 3.92, samples=497 write: IOPS=5, BW=20.8KiB/s (21.3kB/s)(6348KiB/305077msec); 0 zone resets clat (msec): min=42, max=1056, avg=153.34, stdev=85.04 lat (msec): min=42, max=1056, avg=153.34, stdev=85.04 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 70], 10.00th=[ 78], 20.00th=[ 90], | 30.00th=[ 102], 40.00th=[ 113], 50.00th=[ 129], 60.00th=[ 144], | 70.00th=[ 171], 80.00th=[ 207], 90.00th=[ 271], 95.00th=[ 326], | 99.00th=[ 439], 99.50th=[ 485], 99.90th=[ 567], 99.95th=[ 1053], | 99.99th=[ 1053] bw ( KiB/s): min= 7, max= 55, per=25.22%, avg=20.68, stdev=10.33, samples=588 iops : min= 1, max= 13, avg= 4.54, stdev= 2.64, samples=588 lat (msec) : 10=2.44%, 20=13.28%, 50=22.01%, 100=22.33%, 250=32.91% lat (msec) : 500=6.84%, 750=0.13%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.29%, ctx=5565, 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=144196: Mon Jul 20 19:03:02 2026 read: IOPS=4, BW=19.8KiB/s (20.2kB/s)(6028KiB/304936msec) clat (msec): min=6, max=543, avg=42.93, stdev=43.02 lat (msec): min=6, max=543, avg=42.93, stdev=43.02 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 29], 60.00th=[ 35], | 70.00th=[ 44], 80.00th=[ 60], 90.00th=[ 94], 95.00th=[ 125], | 99.00th=[ 218], 99.50th=[ 259], 99.90th=[ 363], 99.95th=[ 542], | 99.99th=[ 542] bw ( KiB/s): min= 7, max= 87, per=29.16%, avg=22.74, stdev=15.46, samples=510 iops : min= 1, max= 21, avg= 5.06, stdev= 3.91, samples=510 write: IOPS=5, BW=20.5KiB/s (21.0kB/s)(6260KiB/304936msec); 0 zone resets clat (msec): min=40, max=1068, avg=153.42, stdev=87.14 lat (msec): min=40, max=1068, avg=153.43, stdev=87.14 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 68], 10.00th=[ 78], 20.00th=[ 91], | 30.00th=[ 104], 40.00th=[ 114], 50.00th=[ 127], 60.00th=[ 142], | 70.00th=[ 167], 80.00th=[ 207], 90.00th=[ 271], 95.00th=[ 326], | 99.00th=[ 435], 99.50th=[ 489], 99.90th=[ 802], 99.95th=[ 1070], | 99.99th=[ 1070] bw ( KiB/s): min= 7, max= 48, per=25.19%, avg=20.65, stdev=10.20, samples=581 iops : min= 1, max= 12, avg= 4.53, stdev= 2.62, samples=581 lat (msec) : 10=1.86%, 20=12.92%, 50=22.30%, 100=21.58%, 250=34.77% lat (msec) : 500=6.32%, 750=0.20%, 1000=0.03%, 2000=0.03% cpu : usr=0.04%, sys=1.29%, ctx=5557, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144197: Mon Jul 20 19:03:02 2026 read: IOPS=4, BW=19.9KiB/s (20.4kB/s)(6052KiB/303901msec) clat (msec): min=5, max=383, avg=41.91, stdev=41.89 lat (msec): min=5, max=383, avg=41.91, stdev=41.89 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 34], | 70.00th=[ 42], 80.00th=[ 56], 90.00th=[ 95], 95.00th=[ 125], | 99.00th=[ 203], 99.50th=[ 253], 99.90th=[ 351], 99.95th=[ 384], | 99.99th=[ 384] bw ( KiB/s): min= 7, max= 87, per=30.36%, avg=23.68, stdev=16.11, samples=493 iops : min= 1, max= 21, avg= 5.29, stdev= 4.04, samples=493 write: IOPS=5, BW=20.5KiB/s (21.0kB/s)(6236KiB/303901msec); 0 zone resets clat (msec): min=41, max=934, avg=154.16, stdev=86.23 lat (msec): min=41, max=934, avg=154.16, stdev=86.23 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 71], 10.00th=[ 81], 20.00th=[ 92], | 30.00th=[ 104], 40.00th=[ 115], 50.00th=[ 128], 60.00th=[ 144], | 70.00th=[ 169], 80.00th=[ 205], 90.00th=[ 275], 95.00th=[ 321], | 99.00th=[ 447], 99.50th=[ 489], 99.90th=[ 793], 99.95th=[ 936], | 99.99th=[ 936] bw ( KiB/s): min= 7, max= 47, per=25.00%, avg=20.50, stdev= 9.91, samples=583 iops : min= 1, max= 11, avg= 4.49, stdev= 2.54, samples=583 lat (msec) : 10=2.05%, 20=13.70%, 50=22.20%, 100=20.70%, 250=34.54% lat (msec) : 500=6.61%, 750=0.10%, 1000=0.10% cpu : usr=0.04%, sys=1.27%, ctx=5518, 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=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=78.7KiB/s (80.6kB/s), 19.5KiB/s-19.9KiB/s (19.9kB/s-20.4kB/s), io=23.4MiB (24.6MB), run=303901-305077msec WRITE: bw=82.4KiB/s (84.4kB/s), 20.5KiB/s-20.8KiB/s (21.0kB/s-21.3kB/s), io=24.6MiB (25.7MB), run=303901-305077msec 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=144275: Mon Jul 20 19:03:40 2026 read: IOPS=13, BW=209KiB/s (214kB/s)(5920KiB/28269msec) clat (usec): min=38, max=244615, avg=39319.04, stdev=33163.06 lat (usec): min=38, max=244616, avg=39320.45, stdev=33162.97 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 61], 10.00th=[ 69], 20.00th=[ 13566], | 30.00th=[ 23987], 40.00th=[ 29492], 50.00th=[ 34866], 60.00th=[ 41157], | 70.00th=[ 47973], 80.00th=[ 58983], 90.00th=[ 78119], 95.00th=[ 91751], | 99.00th=[149947], 99.50th=[244319], 99.90th=[244319], 99.95th=[244319], | 99.99th=[244319] bw ( KiB/s): min= 31, max= 446, per=24.42%, avg=203.89, stdev=85.16, samples=55 iops : min= 1, max= 27, avg=12.00, stdev= 5.30, samples=55 write: IOPS=14, BW=225KiB/s (231kB/s)(6368KiB/28269msec); 0 zone resets clat (usec): min=1667, max=289744, avg=33956.56, stdev=35660.87 lat (usec): min=1669, max=289748, avg=33958.95, stdev=35660.90 clat percentiles (usec): | 1.00th=[ 1745], 5.00th=[ 2089], 10.00th=[ 3326], 20.00th=[ 5276], | 30.00th=[ 7701], 40.00th=[ 13698], 50.00th=[ 21365], 60.00th=[ 30540], | 70.00th=[ 44303], 80.00th=[ 60556], 90.00th=[ 83362], 95.00th=[100140], | 99.00th=[126354], 99.50th=[242222], 99.90th=[291505], 99.95th=[291505], | 99.99th=[291505] bw ( KiB/s): min= 63, max= 414, per=25.30%, avg=222.38, stdev=82.66, samples=55 iops : min= 3, max= 25, avg=13.16, stdev= 5.18, samples=55 lat (usec) : 50=0.91%, 100=6.51%, 250=0.91%, 750=0.13%, 1000=0.13% lat (msec) : 2=2.60%, 4=5.08%, 10=10.29%, 20=8.98%, 50=36.85% lat (msec) : 100=23.31%, 250=4.17%, 500=0.13% cpu : usr=0.06%, sys=6.33%, ctx=1531, 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=144277: Mon Jul 20 19:03:40 2026 read: IOPS=12, BW=200KiB/s (205kB/s)(5744KiB/28653msec) clat (usec): min=47, max=366353, avg=41957.65, stdev=33903.02 lat (usec): min=48, max=366354, avg=41958.84, stdev=33903.05 clat percentiles (usec): | 1.00th=[ 55], 5.00th=[ 67], 10.00th=[ 80], 20.00th=[ 20055], | 30.00th=[ 27132], 40.00th=[ 33817], 50.00th=[ 37487], 60.00th=[ 43254], | 70.00th=[ 50070], 80.00th=[ 58983], 90.00th=[ 77071], 95.00th=[102237], | 99.00th=[149947], 99.50th=[181404], 99.90th=[367002], 99.95th=[367002], | 99.99th=[367002] bw ( KiB/s): min= 30, max= 415, per=23.84%, avg=199.09, stdev=83.74, samples=56 iops : min= 1, max= 25, avg=11.70, stdev= 5.29, samples=56 write: IOPS=14, BW=228KiB/s (234kB/s)(6544KiB/28653msec); 0 zone resets clat (usec): min=1695, max=412233, avg=32806.97, stdev=39459.02 lat (usec): min=1697, max=412256, avg=32809.64, stdev=39459.37 clat percentiles (usec): | 1.00th=[ 1860], 5.00th=[ 2376], 10.00th=[ 3425], 20.00th=[ 6194], | 30.00th=[ 8455], 40.00th=[ 12256], 50.00th=[ 19792], 60.00th=[ 29230], | 70.00th=[ 36963], 80.00th=[ 52167], 90.00th=[ 83362], 95.00th=[ 98042], | 99.00th=[181404], 99.50th=[196084], 99.90th=[413139], 99.95th=[413139], | 99.99th=[413139] bw ( KiB/s): min= 63, max= 565, per=25.76%, avg=226.41, stdev=88.69, samples=56 iops : min= 3, max= 35, avg=13.43, stdev= 5.63, samples=56 lat (usec) : 50=0.13%, 100=5.60%, 250=0.78% lat (msec) : 2=1.69%, 4=4.82%, 10=12.24%, 20=11.07%, 50=38.67% lat (msec) : 100=20.05%, 250=4.69%, 500=0.26% cpu : usr=0.08%, sys=6.72%, ctx=1576, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144279: Mon Jul 20 19:03:40 2026 read: IOPS=14, BW=227KiB/s (233kB/s)(6256KiB/27522msec) clat (usec): min=33, max=225819, avg=39280.74, stdev=31955.13 lat (usec): min=33, max=225820, avg=39282.65, stdev=31954.62 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 62], 10.00th=[ 72], 20.00th=[ 971], | 30.00th=[ 23987], 40.00th=[ 30278], 50.00th=[ 35390], 60.00th=[ 42206], | 70.00th=[ 49021], 80.00th=[ 58983], 90.00th=[ 80217], 95.00th=[ 95945], | 99.00th=[149947], 99.50th=[175113], 99.90th=[225444], 99.95th=[225444], | 99.99th=[225444] bw ( KiB/s): min= 31, max= 502, per=27.30%, avg=227.96, stdev=82.50, samples=54 iops : min= 1, max= 31, avg=13.52, stdev= 5.20, samples=54 write: IOPS=13, BW=219KiB/s (224kB/s)(6032KiB/27522msec); 0 zone resets clat (usec): min=1681, max=177077, avg=32002.88, stdev=31959.07 lat (usec): min=1683, max=177080, avg=32031.52, stdev=31941.32 clat percentiles (usec): | 1.00th=[ 1762], 5.00th=[ 2114], 10.00th=[ 3621], 20.00th=[ 6128], | 30.00th=[ 9241], 40.00th=[ 13829], 50.00th=[ 21890], 60.00th=[ 29492], | 70.00th=[ 41681], 80.00th=[ 51643], 90.00th=[ 78119], 95.00th=[100140], | 99.00th=[158335], 99.50th=[166724], 99.90th=[177210], 99.95th=[177210], | 99.99th=[177210] bw ( KiB/s): min= 60, max= 350, per=24.67%, avg=216.85, stdev=80.02, samples=54 iops : min= 3, max= 21, avg=12.81, stdev= 5.06, samples=54 lat (usec) : 50=0.52%, 100=7.55%, 250=1.82%, 750=0.13%, 1000=0.26% lat (msec) : 2=1.82%, 4=4.17%, 10=10.03%, 20=8.72%, 50=39.71% lat (msec) : 100=20.57%, 250=4.69% cpu : usr=0.09%, sys=6.74%, ctx=1586, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144280: Mon Jul 20 19:03:40 2026 read: IOPS=13, BW=213KiB/s (218kB/s)(6032KiB/28343msec) clat (usec): min=33, max=432893, avg=40814.86, stdev=42527.88 lat (usec): min=34, max=432894, avg=40816.19, stdev=42527.87 clat percentiles (usec): | 1.00th=[ 42], 5.00th=[ 63], 10.00th=[ 73], 20.00th=[ 10421], | 30.00th=[ 25822], 40.00th=[ 30278], 50.00th=[ 34866], 60.00th=[ 41157], | 70.00th=[ 48497], 80.00th=[ 58459], 90.00th=[ 76022], 95.00th=[ 96994], | 99.00th=[212861], 99.50th=[400557], 99.90th=[434111], 99.95th=[434111], | 99.99th=[434111] bw ( KiB/s): min= 61, max= 413, per=25.89%, avg=216.22, stdev=88.32, samples=55 iops : min= 3, max= 25, avg=12.76, stdev= 5.57, samples=55 write: IOPS=13, BW=221KiB/s (226kB/s)(6256KiB/28343msec); 0 zone resets clat (usec): min=1585, max=252358, avg=32553.12, stdev=35607.93 lat (usec): min=1586, max=252361, avg=32559.77, stdev=35618.97 clat percentiles (usec): | 1.00th=[ 1713], 5.00th=[ 1926], 10.00th=[ 2409], 20.00th=[ 5473], | 30.00th=[ 8586], 40.00th=[ 12256], 50.00th=[ 20055], 60.00th=[ 28443], | 70.00th=[ 38536], 80.00th=[ 57934], 90.00th=[ 82314], 95.00th=[ 95945], | 99.00th=[183501], 99.50th=[217056], 99.90th=[252707], 99.95th=[252707], | 99.99th=[252707] bw ( KiB/s): min= 31, max= 474, per=25.10%, avg=220.64, stdev=91.69, samples=56 iops : min= 1, max= 29, avg=13.05, stdev= 5.72, samples=56 lat (usec) : 50=0.52%, 100=6.77%, 250=0.78%, 500=0.65% lat (msec) : 2=3.52%, 4=4.43%, 10=10.68%, 20=10.42%, 50=35.94% lat (msec) : 100=22.14%, 250=3.78%, 500=0.39% cpu : usr=0.09%, sys=6.42%, ctx=1575, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=836KiB/s (856kB/s), 200KiB/s-227KiB/s (205kB/s-233kB/s), io=23.4MiB (24.5MB), run=27522-28653msec WRITE: bw=879KiB/s (901kB/s), 219KiB/s-228KiB/s (224kB/s-234kB/s), io=24.6MiB (25.8MB), run=27522-28653msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144274: Mon Jul 20 19:04:19 2026 read: IOPS=5, BW=87.8KiB/s (89.9kB/s)(5920KiB/67433msec) clat (msec): min=6, max=244, avg=36.62, stdev=36.13 lat (msec): min=6, max=244, avg=36.62, stdev=36.13 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 22], 50.00th=[ 25], 60.00th=[ 29], | 70.00th=[ 37], 80.00th=[ 47], 90.00th=[ 69], 95.00th=[ 114], | 99.00th=[ 203], 99.50th=[ 224], 99.90th=[ 245], 99.95th=[ 245], | 99.99th=[ 245] bw ( KiB/s): min= 31, max= 319, per=26.87%, avg=95.12, stdev=60.88, samples=121 iops : min= 1, max= 19, avg= 5.17, stdev= 3.82, samples=121 write: IOPS=5, BW=94.4KiB/s (96.7kB/s)(6368KiB/67433msec); 0 zone resets clat (msec): min=38, max=421, avg=134.82, stdev=55.89 lat (msec): min=38, max=421, avg=134.83, stdev=55.89 clat percentiles (msec): | 1.00th=[ 62], 5.00th=[ 71], 10.00th=[ 77], 20.00th=[ 90], | 30.00th=[ 103], 40.00th=[ 113], 50.00th=[ 124], 60.00th=[ 136], | 70.00th=[ 148], 80.00th=[ 169], 90.00th=[ 213], 95.00th=[ 251], | 99.00th=[ 326], 99.50th=[ 342], 99.90th=[ 422], 99.95th=[ 422], | 99.99th=[ 422] bw ( KiB/s): min= 29, max= 192, per=25.12%, avg=93.69, stdev=38.48, samples=133 iops : min= 1, max= 12, avg= 5.08, stdev= 2.53, samples=133 lat (msec) : 10=0.91%, 20=16.80%, 50=22.27%, 100=20.44%, 250=36.98% lat (msec) : 500=2.60% cpu : usr=0.04%, sys=1.67%, ctx=1389, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144276: Mon Jul 20 19:04:19 2026 read: IOPS=5, BW=85.0KiB/s (87.1kB/s)(5744KiB/67538msec) clat (msec): min=7, max=192, avg=33.48, stdev=28.80 lat (msec): min=7, max=192, avg=33.49, stdev=28.80 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 18], 40.00th=[ 20], 50.00th=[ 23], 60.00th=[ 27], | 70.00th=[ 34], 80.00th=[ 46], 90.00th=[ 80], 95.00th=[ 95], | 99.00th=[ 136], 99.50th=[ 176], 99.90th=[ 192], 99.95th=[ 192], | 99.99th=[ 192] bw ( KiB/s): min= 30, max= 319, per=29.86%, avg=105.69, stdev=64.83, samples=106 iops : min= 1, max= 19, avg= 5.84, stdev= 4.12, samples=106 write: IOPS=6, BW=96.9KiB/s (99.2kB/s)(6544KiB/67538msec); 0 zone resets clat (msec): min=42, max=470, avg=135.29, stdev=58.02 lat (msec): min=42, max=470, avg=135.29, stdev=58.02 clat percentiles (msec): | 1.00th=[ 46], 5.00th=[ 67], 10.00th=[ 75], 20.00th=[ 89], | 30.00th=[ 104], 40.00th=[ 115], 50.00th=[ 129], 60.00th=[ 136], | 70.00th=[ 150], 80.00th=[ 176], 90.00th=[ 205], 95.00th=[ 236], | 99.00th=[ 334], 99.50th=[ 409], 99.90th=[ 472], 99.95th=[ 472], | 99.99th=[ 472] bw ( KiB/s): min= 31, max= 192, per=25.90%, avg=96.61, stdev=37.16, samples=132 iops : min= 1, max= 12, avg= 5.26, stdev= 2.45, samples=132 lat (msec) : 10=2.47%, 20=16.67%, 50=20.57%, 100=19.92%, 250=38.28% lat (msec) : 500=2.08% cpu : usr=0.05%, sys=1.66%, ctx=1400, 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=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=144278: Mon Jul 20 19:04:19 2026 read: IOPS=5, BW=94.6KiB/s (96.9kB/s)(6256KiB/66119msec) clat (msec): min=7, max=274, avg=35.21, stdev=30.96 lat (msec): min=7, max=274, avg=35.21, stdev=30.96 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 26], 60.00th=[ 31], | 70.00th=[ 36], 80.00th=[ 44], 90.00th=[ 65], 95.00th=[ 102], | 99.00th=[ 176], 99.50th=[ 178], 99.90th=[ 275], 99.95th=[ 275], | 99.99th=[ 275] bw ( KiB/s): min= 30, max= 416, per=28.89%, avg=102.26, stdev=69.09, samples=121 iops : min= 1, max= 26, avg= 5.61, stdev= 4.41, samples=121 write: IOPS=5, BW=91.2KiB/s (93.4kB/s)(6032KiB/66119msec); 0 zone resets clat (msec): min=48, max=415, avg=138.64, stdev=59.75 lat (msec): min=48, max=415, avg=138.65, stdev=59.76 clat percentiles (msec): | 1.00th=[ 62], 5.00th=[ 73], 10.00th=[ 80], 20.00th=[ 91], | 30.00th=[ 104], 40.00th=[ 112], 50.00th=[ 124], 60.00th=[ 138], | 70.00th=[ 157], 80.00th=[ 176], 90.00th=[ 226], 95.00th=[ 275], | 99.00th=[ 330], 99.50th=[ 401], 99.90th=[ 418], 99.95th=[ 418], | 99.99th=[ 418] bw ( KiB/s): min= 30, max= 191, per=24.52%, avg=91.45, stdev=36.71, samples=130 iops : min= 1, max= 11, avg= 4.92, stdev= 2.38, samples=130 lat (msec) : 10=1.30%, 20=15.49%, 50=25.91%, 100=19.27%, 250=34.51% lat (msec) : 500=3.52% cpu : usr=0.04%, sys=1.70%, ctx=1431, 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=144281: Mon Jul 20 19:04:19 2026 read: IOPS=5, BW=90.3KiB/s (92.5kB/s)(6032KiB/66766msec) clat (msec): min=7, max=282, avg=37.23, stdev=36.03 lat (msec): min=7, max=282, avg=37.23, stdev=36.03 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 26], 60.00th=[ 29], | 70.00th=[ 34], 80.00th=[ 47], 90.00th=[ 82], 95.00th=[ 123], | 99.00th=[ 184], 99.50th=[ 201], 99.90th=[ 284], 99.95th=[ 284], | 99.99th=[ 284] bw ( KiB/s): min= 31, max= 317, per=28.12%, avg=99.54, stdev=64.29, samples=118 iops : min= 1, max= 19, avg= 5.45, stdev= 4.08, samples=118 write: IOPS=5, BW=93.7KiB/s (95.9kB/s)(6256KiB/66766msec); 0 zone resets clat (msec): min=53, max=461, avg=134.36, stdev=57.13 lat (msec): min=53, max=461, avg=134.36, stdev=57.13 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 70], 10.00th=[ 78], 20.00th=[ 92], | 30.00th=[ 101], 40.00th=[ 108], 50.00th=[ 123], 60.00th=[ 138], | 70.00th=[ 148], 80.00th=[ 167], 90.00th=[ 207], 95.00th=[ 251], | 99.00th=[ 342], 99.50th=[ 430], 99.90th=[ 464], 99.95th=[ 464], | 99.99th=[ 464] bw ( KiB/s): min= 31, max= 160, per=24.98%, avg=93.18, stdev=38.19, samples=132 iops : min= 1, max= 10, avg= 5.04, stdev= 2.49, samples=132 lat (msec) : 10=1.43%, 20=15.76%, 50=22.79%, 100=20.83%, 250=36.46% lat (msec) : 500=2.73% cpu : usr=0.04%, sys=1.60%, ctx=1391, 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=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=355KiB/s (363kB/s), 85.0KiB/s-94.6KiB/s (87.1kB/s-96.9kB/s), io=23.4MiB (24.5MB), run=66119-67538msec WRITE: bw=373KiB/s (382kB/s), 91.2KiB/s-96.9KiB/s (93.4kB/s-99.2kB/s), io=24.6MiB (25.8MB), run=66119-67538msec 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=144296: Mon Jul 20 19:04:36 2026 read: IOPS=1, BW=1169KiB/s (1197kB/s)(7168KiB/6131msec) clat (msec): min=44, max=3011, avg=612.86, stdev=1063.77 lat (msec): min=44, max=3011, avg=612.86, stdev=1063.77 clat percentiles (msec): | 1.00th=[ 45], 5.00th=[ 45], 10.00th=[ 45], 20.00th=[ 128], | 30.00th=[ 169], 40.00th=[ 169], 50.00th=[ 234], 60.00th=[ 326], | 70.00th=[ 326], 80.00th=[ 380], 90.00th=[ 3004], 95.00th=[ 3004], | 99.00th=[ 3004], 99.50th=[ 3004], 99.90th=[ 3004], 99.95th=[ 3004], | 99.99th=[ 3004] bw ( KiB/s): min= 1943, max= 4079, per=100.00%, avg=2807.50, stdev=1012.64, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=0, BW=835KiB/s (855kB/s)(5120KiB/6131msec); 0 zone resets clat (msec): min=111, max=675, avg=359.62, stdev=219.42 lat (msec): min=112, max=675, avg=359.73, stdev=219.40 clat percentiles (msec): | 1.00th=[ 112], 5.00th=[ 112], 10.00th=[ 112], 20.00th=[ 112], | 30.00th=[ 218], 40.00th=[ 218], 50.00th=[ 334], 60.00th=[ 334], | 70.00th=[ 460], 80.00th=[ 460], 90.00th=[ 676], 95.00th=[ 676], | 99.00th=[ 676], 99.50th=[ 676], 99.90th=[ 676], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 1943, max= 3730, per=68.20%, avg=2572.00, stdev=1004.10, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (msec) : 50=8.33%, 250=41.67%, 500=33.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=9.59%, ctx=626, 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=144297: Mon Jul 20 19:04:36 2026 read: IOPS=0, BW=269KiB/s (276kB/s)(2048KiB/7603msec) clat (msec): min=123, max=345, avg=234.59, stdev=156.71 lat (msec): min=123, max=345, avg=234.59, stdev=156.71 clat percentiles (msec): | 1.00th=[ 125], 5.00th=[ 125], 10.00th=[ 125], 20.00th=[ 125], | 30.00th=[ 125], 40.00th=[ 125], 50.00th=[ 125], 60.00th=[ 347], | 70.00th=[ 347], 80.00th=[ 347], 90.00th=[ 347], 95.00th=[ 347], | 99.00th=[ 347], 99.50th=[ 347], 99.90th=[ 347], 99.95th=[ 347], | 99.99th=[ 347] bw ( KiB/s): min= 1568, max= 1903, per=64.44%, avg=1735.50, stdev=236.88, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1347KiB/s (1379kB/s)(10.0MiB/7603msec); 0 zone resets clat (msec): min=120, max=3407, avg=698.33, stdev=1028.37 lat (msec): min=120, max=3407, avg=698.79, stdev=1028.22 clat percentiles (msec): | 1.00th=[ 121], 5.00th=[ 121], 10.00th=[ 121], 20.00th=[ 161], | 30.00th=[ 169], 40.00th=[ 220], 50.00th=[ 222], 60.00th=[ 300], | 70.00th=[ 347], 80.00th=[ 617], 90.00th=[ 1418], 95.00th=[ 3406], | 99.00th=[ 3406], 99.50th=[ 3406], 99.90th=[ 3406], 99.95th=[ 3406], | 99.99th=[ 3406] bw ( KiB/s): min= 1903, max= 6131, per=96.09%, avg=3623.40, stdev=1736.88, samples=5 iops : min= 1, max= 5, avg= 2.60, stdev= 1.67, samples=5 lat (msec) : 250=50.00%, 500=25.00%, 750=8.33%, 2000=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=9.22%, ctx=157, 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=144298: Mon Jul 20 19:04:36 2026 read: IOPS=0, BW=994KiB/s (1018kB/s)(6144KiB/6183msec) clat (usec): min=570, max=426172, avg=122922.72, stdev=165155.35 lat (usec): min=571, max=426172, avg=122923.80, stdev=165155.27 clat percentiles (usec): | 1.00th=[ 570], 5.00th=[ 570], 10.00th=[ 570], 20.00th=[ 586], | 30.00th=[ 586], 40.00th=[ 46924], 50.00th=[ 46924], 60.00th=[ 66323], | 70.00th=[196084], 80.00th=[196084], 90.00th=[425722], 95.00th=[425722], | 99.00th=[425722], 99.50th=[425722], 99.90th=[425722], 99.95th=[425722], | 99.99th=[425722] bw ( KiB/s): min= 1943, max= 4079, per=100.00%, avg=3250.67, stdev=1145.84, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=0, BW=994KiB/s (1018kB/s)(6144KiB/6183msec); 0 zone resets clat (msec): min=141, max=3285, avg=885.23, stdev=1194.63 lat (msec): min=141, max=3285, avg=885.58, stdev=1194.54 clat percentiles (msec): | 1.00th=[ 142], 5.00th=[ 142], 10.00th=[ 142], 20.00th=[ 201], | 30.00th=[ 201], 40.00th=[ 426], 50.00th=[ 426], 60.00th=[ 567], | 70.00th=[ 693], 80.00th=[ 693], 90.00th=[ 3272], 95.00th=[ 3272], | 99.00th=[ 3272], 99.50th=[ 3272], 99.90th=[ 3272], 99.95th=[ 3272], | 99.99th=[ 3272] bw ( KiB/s): min= 1607, max= 2039, per=50.20%, avg=1893.00, stdev=173.44, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (usec) : 750=16.67% lat (msec) : 50=8.33%, 100=8.33%, 250=25.00%, 500=16.67%, 750=16.67% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=5.84%, ctx=118, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144299: Mon Jul 20 19:04:36 2026 read: IOPS=0, BW=836KiB/s (856kB/s)(5120KiB/6124msec) clat (usec): min=771, max=322215, avg=132758.40, stdev=145413.98 lat (usec): min=773, max=322217, avg=132759.74, stdev=145413.81 clat percentiles (usec): | 1.00th=[ 775], 5.00th=[ 775], 10.00th=[ 775], 20.00th=[ 775], | 30.00th=[ 873], 40.00th=[ 873], 50.00th=[ 95945], 60.00th=[ 95945], | 70.00th=[244319], 80.00th=[244319], 90.00th=[320865], 95.00th=[320865], | 99.00th=[320865], 99.50th=[320865], 99.90th=[320865], 99.95th=[320865], | 99.99th=[320865] bw ( KiB/s): min= 1980, max= 5595, per=100.00%, avg=3787.50, stdev=2556.19, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1170KiB/s (1199kB/s)(7168KiB/6124msec); 0 zone resets clat (msec): min=260, max=2990, avg=757.84, stdev=993.64 lat (msec): min=260, max=2992, avg=758.25, stdev=994.43 clat percentiles (msec): | 1.00th=[ 262], 5.00th=[ 262], 10.00th=[ 262], 20.00th=[ 264], | 30.00th=[ 288], 40.00th=[ 288], 50.00th=[ 380], 60.00th=[ 506], | 70.00th=[ 506], 80.00th=[ 617], 90.00th=[ 3004], 95.00th=[ 3004], | 99.00th=[ 3004], 99.50th=[ 3004], 99.90th=[ 3004], 99.95th=[ 3004], | 99.99th=[ 3004] bw ( KiB/s): min= 1865, max= 2043, per=52.51%, avg=1980.17, stdev=67.83, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (usec) : 1000=16.67% lat (msec) : 100=8.33%, 250=8.33%, 500=41.67%, 750=16.67%, >=2000=8.33% cpu : usr=0.00%, sys=8.79%, ctx=135, 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=2694KiB/s (2758kB/s), 269KiB/s-1169KiB/s (276kB/s-1197kB/s), io=20.0MiB (20.0MB), run=6124-7603msec WRITE: bw=3771KiB/s (3862kB/s), 835KiB/s-1347KiB/s (855kB/s-1379kB/s), io=28.0MiB (29.4MB), run=6124-7603msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144301: Mon Jul 20 19:04:37 2026 read: IOPS=0, BW=920KiB/s (942kB/s)(7168KiB/7789msec) clat (msec): min=98, max=2951, avg=873.85, stdev=1117.24 lat (msec): min=98, max=2951, avg=873.85, stdev=1117.24 clat percentiles (msec): | 1.00th=[ 99], 5.00th=[ 99], 10.00th=[ 99], 20.00th=[ 113], | 30.00th=[ 197], 40.00th=[ 197], 50.00th=[ 264], 60.00th=[ 584], | 70.00th=[ 584], 80.00th=[ 1905], 90.00th=[ 2937], 95.00th=[ 2937], | 99.00th=[ 2937], 99.50th=[ 2937], 99.90th=[ 2937], 99.95th=[ 2937], | 99.99th=[ 2937] bw ( KiB/s): min= 1961, max= 2043, per=76.57%, avg=2011.50, stdev=31.84, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 write: IOPS=0, BW=657KiB/s (673kB/s)(5120KiB/7789msec); 0 zone resets clat (msec): min=180, max=435, avg=323.89, stdev=114.00 lat (msec): min=180, max=435, avg=324.22, stdev=114.04 clat percentiles (msec): | 1.00th=[ 180], 5.00th=[ 180], 10.00th=[ 180], 20.00th=[ 180], | 30.00th=[ 243], 40.00th=[ 243], 50.00th=[ 330], 60.00th=[ 330], | 70.00th=[ 435], 80.00th=[ 435], 90.00th=[ 435], 95.00th=[ 435], | 99.00th=[ 435], 99.50th=[ 435], 99.90th=[ 435], 99.95th=[ 435], | 99.99th=[ 435] bw ( KiB/s): min= 1961, max= 4096, per=68.79%, avg=2530.75, stdev=1044.08, samples=4 iops : min= 1, max= 4, avg= 1.75, stdev= 1.50, samples=4 lat (msec) : 100=8.33%, 250=33.33%, 500=33.33%, 750=8.33%, 2000=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.03%, sys=2.45%, ctx=79, 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=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=144302: Mon Jul 20 19:04:37 2026 read: IOPS=0, BW=265KiB/s (271kB/s)(2048KiB/7739msec) clat (msec): min=101, max=381, avg=241.32, stdev=197.93 lat (msec): min=101, max=381, avg=241.32, stdev=197.93 clat percentiles (msec): | 1.00th=[ 102], 5.00th=[ 102], 10.00th=[ 102], 20.00th=[ 102], | 30.00th=[ 102], 40.00th=[ 102], 50.00th=[ 102], 60.00th=[ 380], | 70.00th=[ 380], 80.00th=[ 380], 90.00th=[ 380], 95.00th=[ 380], | 99.00th=[ 380], 99.50th=[ 380], 99.90th=[ 380], 99.95th=[ 380], | 99.99th=[ 380] bw ( KiB/s): min= 1780, max= 2043, per=72.76%, avg=1911.50, stdev=185.97, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1323KiB/s (1355kB/s)(10.0MiB/7739msec); 0 zone resets clat (msec): min=233, max=3997, avg=721.95, stdev=1156.89 lat (msec): min=233, max=3997, avg=722.26, stdev=1156.81 clat percentiles (msec): | 1.00th=[ 234], 5.00th=[ 234], 10.00th=[ 234], 20.00th=[ 239], | 30.00th=[ 305], 40.00th=[ 321], 50.00th=[ 330], 60.00th=[ 342], | 70.00th=[ 372], 80.00th=[ 443], 90.00th=[ 642], 95.00th=[ 4010], | 99.00th=[ 4010], 99.50th=[ 4010], 99.90th=[ 4010], 99.95th=[ 4010], | 99.99th=[ 4010] bw ( KiB/s): min= 1928, max= 4096, per=73.32%, avg=2697.33, stdev=1080.63, samples=6 iops : min= 1, max= 4, avg= 1.83, stdev= 1.33, samples=6 lat (msec) : 250=25.00%, 500=58.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.01%, sys=2.70%, ctx=81, 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=144303: Mon Jul 20 19:04:37 2026 read: IOPS=0, BW=823KiB/s (843kB/s)(6144KiB/7467msec) clat (msec): min=92, max=511, avg=248.55, stdev=172.89 lat (msec): min=92, max=511, avg=248.56, stdev=172.89 clat percentiles (msec): | 1.00th=[ 93], 5.00th=[ 93], 10.00th=[ 93], 20.00th=[ 131], | 30.00th=[ 131], 40.00th=[ 153], 50.00th=[ 153], 60.00th=[ 188], | 70.00th=[ 418], 80.00th=[ 418], 90.00th=[ 514], 95.00th=[ 514], | 99.00th=[ 514], 99.50th=[ 514], 99.90th=[ 514], 99.95th=[ 514], | 99.99th=[ 514] bw ( KiB/s): min= 2023, max= 4087, per=100.00%, avg=3375.00, stdev=1171.42, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=0, BW=823KiB/s (843kB/s)(6144KiB/7467msec); 0 zone resets clat (msec): min=157, max=4022, avg=964.83, stdev=1502.43 lat (msec): min=158, max=4023, avg=964.93, stdev=1502.43 clat percentiles (msec): | 1.00th=[ 159], 5.00th=[ 159], 10.00th=[ 159], 20.00th=[ 334], | 30.00th=[ 334], 40.00th=[ 359], 50.00th=[ 359], 60.00th=[ 422], | 70.00th=[ 498], 80.00th=[ 498], 90.00th=[ 4010], 95.00th=[ 4010], | 99.00th=[ 4010], 99.50th=[ 4010], 99.90th=[ 4010], 99.95th=[ 4010], | 99.99th=[ 4010] bw ( KiB/s): min= 2007, max= 4063, per=66.24%, avg=2436.80, stdev=909.22, samples=5 iops : min= 1, max= 3, avg= 1.60, stdev= 0.89, samples=5 lat (msec) : 100=8.33%, 250=33.33%, 500=41.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=2.40%, ctx=84, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=6,6,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144304: Mon Jul 20 19:04:37 2026 read: IOPS=0, BW=657KiB/s (673kB/s)(5120KiB/7793msec) clat (msec): min=83, max=375, avg=175.19, stdev=117.54 lat (msec): min=83, max=375, avg=175.20, stdev=117.54 clat percentiles (msec): | 1.00th=[ 85], 5.00th=[ 85], 10.00th=[ 85], 20.00th=[ 85], | 30.00th=[ 96], 40.00th=[ 96], 50.00th=[ 150], 60.00th=[ 150], | 70.00th=[ 171], 80.00th=[ 171], 90.00th=[ 376], 95.00th=[ 376], | 99.00th=[ 376], 99.50th=[ 376], 99.90th=[ 376], 99.95th=[ 376], | 99.99th=[ 376] bw ( KiB/s): min= 4047, max= 4087, per=100.00%, avg=4067.00, stdev=28.28, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=0, BW=920KiB/s (942kB/s)(7168KiB/7793msec); 0 zone resets clat (msec): min=269, max=3847, avg=969.54, stdev=1278.66 lat (msec): min=269, max=3847, avg=969.65, stdev=1278.64 clat percentiles (msec): | 1.00th=[ 271], 5.00th=[ 271], 10.00th=[ 271], 20.00th=[ 275], | 30.00th=[ 531], 40.00th=[ 531], 50.00th=[ 592], 60.00th=[ 617], | 70.00th=[ 617], 80.00th=[ 651], 90.00th=[ 3842], 95.00th=[ 3842], | 99.00th=[ 3842], 99.50th=[ 3842], 99.90th=[ 3842], 99.95th=[ 3842], | 99.99th=[ 3842] bw ( KiB/s): min= 1928, max= 2048, per=54.44%, avg=2003.00, stdev=48.61, samples=6 iops : min= 1, max= 2, avg= 1.17, stdev= 0.41, samples=6 lat (msec) : 100=16.67%, 250=16.67%, 500=25.00%, 750=33.33%, >=2000=8.33% cpu : usr=0.01%, sys=4.03%, ctx=83, 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=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=2628KiB/s (2691kB/s), 265KiB/s-920KiB/s (271kB/s-942kB/s), io=20.0MiB (20.0MB), run=7467-7793msec WRITE: bw=3679KiB/s (3768kB/s), 657KiB/s-1323KiB/s (673kB/s-1355kB/s), io=28.0MiB (29.4MB), run=7467-7793msec 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=144316: Mon Jul 20 19:04:54 2026 read: IOPS=0, BW=1906KiB/s (1952kB/s)(12.0MiB/6446msec) clat (msec): min=275, max=4949, avg=2049.06, stdev=2532.39 lat (msec): min=275, max=4949, avg=2049.06, stdev=2532.39 clat percentiles (msec): | 1.00th=[ 275], 5.00th=[ 275], 10.00th=[ 275], 20.00th=[ 275], | 30.00th=[ 275], 40.00th=[ 919], 50.00th=[ 919], 60.00th=[ 919], | 70.00th=[ 4933], 80.00th=[ 4933], 90.00th=[ 4933], 95.00th=[ 4933], | 99.00th=[ 4933], 99.50th=[ 4933], 99.90th=[ 4933], 99.95th=[ 4933], | 99.99th=[ 4933] bw ( KiB/s): min= 8159, max= 8175, per=100.00%, avg=8167.00, stdev=11.31, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 1000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.19%, ctx=73, 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=144317: Mon Jul 20 19:04:54 2026 read: IOPS=0, BW=629KiB/s (644kB/s)(4096KiB/6512msec) clat (nsec): min=4739.1M, max=4739.1M, avg=4739067926.00, stdev= 0.00 lat (nsec): min=4739.1M, max=4739.1M, avg=4739070686.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 4732], 5.00th=[ 4732], 10.00th=[ 4732], 20.00th=[ 4732], | 30.00th=[ 4732], 40.00th=[ 4732], 50.00th=[ 4732], 60.00th=[ 4732], | 70.00th=[ 4732], 80.00th=[ 4732], 90.00th=[ 4732], 95.00th=[ 4732], | 99.00th=[ 4732], 99.50th=[ 4732], 99.90th=[ 4732], 99.95th=[ 4732], | 99.99th=[ 4732] 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=1258KiB/s (1288kB/s)(8192KiB/6512msec); 0 zone resets clat (msec): min=454, max=1161, avg=807.88, stdev=500.00 lat (msec): min=454, max=1162, avg=808.95, stdev=500.66 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=[ 1167], | 70.00th=[ 1167], 80.00th=[ 1167], 90.00th=[ 1167], 95.00th=[ 1167], | 99.00th=[ 1167], 99.50th=[ 1167], 99.90th=[ 1167], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 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 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.90%, ctx=50, 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=144318: Mon Jul 20 19:04:54 2026 write: IOPS=0, BW=1730KiB/s (1772kB/s)(12.0MiB/7102msec); 0 zone resets clat (msec): min=503, max=4563, avg=2351.33, stdev=2054.35 lat (msec): min=503, max=4565, avg=2352.28, stdev=2054.99 clat percentiles (msec): | 1.00th=[ 506], 5.00th=[ 506], 10.00th=[ 506], 20.00th=[ 506], | 30.00th=[ 506], 40.00th=[ 1989], 50.00th=[ 1989], 60.00th=[ 1989], | 70.00th=[ 4597], 80.00th=[ 4597], 90.00th=[ 4597], 95.00th=[ 4597], | 99.00th=[ 4597], 99.50th=[ 4597], 99.90th=[ 4597], 99.95th=[ 4597], | 99.99th=[ 4597] bw ( KiB/s): min= 8126, max= 8175, per=100.00%, avg=8150.50, stdev=34.65, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 750=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=3.31%, ctx=126, 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=144319: Mon Jul 20 19:04:54 2026 write: IOPS=0, BW=1911KiB/s (1957kB/s)(12.0MiB/6431msec); 0 zone resets clat (msec): min=353, max=5282, avg=2119.53, stdev=2745.16 lat (msec): min=354, max=5282, avg=2120.33, stdev=2744.84 clat percentiles (msec): | 1.00th=[ 355], 5.00th=[ 355], 10.00th=[ 355], 20.00th=[ 355], | 30.00th=[ 355], 40.00th=[ 726], 50.00th=[ 726], 60.00th=[ 726], | 70.00th=[ 5269], 80.00th=[ 5269], 90.00th=[ 5269], 95.00th=[ 5269], | 99.00th=[ 5269], 99.50th=[ 5269], 99.90th=[ 5269], 99.95th=[ 5269], | 99.99th=[ 5269] bw ( KiB/s): min= 8094, max= 8159, per=100.00%, avg=8126.50, stdev=45.96, 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=0.02%, sys=2.02%, 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=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=2516KiB/s (2576kB/s), 629KiB/s-1906KiB/s (644kB/s-1952kB/s), io=16.0MiB (16.8MB), run=6446-6512msec WRITE: bw=4614KiB/s (4725kB/s), 1258KiB/s-1911KiB/s (1288kB/s-1957kB/s), io=32.0MiB (33.6MB), run=6431-7102msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144312: Mon Jul 20 19:04:54 2026 read: IOPS=0, BW=2092KiB/s (2142kB/s)(12.0MiB/5875msec) clat (msec): min=835, max=4068, avg=1927.86, stdev=1853.88 lat (msec): min=835, max=4068, avg=1927.86, stdev=1853.88 clat percentiles (msec): | 1.00th=[ 835], 5.00th=[ 835], 10.00th=[ 835], 20.00th=[ 835], | 30.00th=[ 835], 40.00th=[ 877], 50.00th=[ 877], 60.00th=[ 877], | 70.00th=[ 4077], 80.00th=[ 4077], 90.00th=[ 4077], 95.00th=[ 4077], | 99.00th=[ 4077], 99.50th=[ 4077], 99.90th=[ 4077], 99.95th=[ 4077], | 99.99th=[ 4077] bw ( KiB/s): min= 8094, max= 8126, per=100.00%, avg=8110.00, stdev=22.63, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 1000=66.67%, >=2000=33.33% cpu : usr=0.00%, sys=9.28%, ctx=640, 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=144313: Mon Jul 20 19:04:54 2026 read: IOPS=0, BW=670KiB/s (686kB/s)(4096KiB/6117msec) clat (nsec): min=4262.2M, max=4262.2M, avg=4262182600.00, stdev= 0.00 lat (nsec): min=4262.2M, max=4262.2M, avg=4262186138.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 4279], 5.00th=[ 4279], 10.00th=[ 4279], 20.00th=[ 4279], | 30.00th=[ 4279], 40.00th=[ 4279], 50.00th=[ 4279], 60.00th=[ 4279], | 70.00th=[ 4279], 80.00th=[ 4279], 90.00th=[ 4279], 95.00th=[ 4279], | 99.00th=[ 4279], 99.50th=[ 4279], 99.90th=[ 4279], 99.95th=[ 4279], | 99.99th=[ 4279] bw ( KiB/s): min= 8159, max= 8159, per=100.00%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1339KiB/s (1371kB/s)(8192KiB/6117msec); 0 zone resets clat (msec): min=491, max=1267, avg=879.45, stdev=548.67 lat (msec): min=493, max=1271, avg=882.09, stdev=550.23 clat percentiles (msec): | 1.00th=[ 493], 5.00th=[ 493], 10.00th=[ 493], 20.00th=[ 493], | 30.00th=[ 493], 40.00th=[ 493], 50.00th=[ 493], 60.00th=[ 1267], | 70.00th=[ 1267], 80.00th=[ 1267], 90.00th=[ 1267], 95.00th=[ 1267], | 99.00th=[ 1267], 99.50th=[ 1267], 99.90th=[ 1267], 99.95th=[ 1267], | 99.99th=[ 1267] 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 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.03%, sys=4.17%, ctx=439, 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=144314: Mon Jul 20 19:04:54 2026 write: IOPS=0, BW=1657KiB/s (1696kB/s)(12.0MiB/7418msec); 0 zone resets clat (msec): min=298, max=5281, avg=2374.63, stdev=2593.51 lat (msec): min=299, max=5282, avg=2375.34, stdev=2593.56 clat percentiles (msec): | 1.00th=[ 300], 5.00th=[ 300], 10.00th=[ 300], 20.00th=[ 300], | 30.00th=[ 300], 40.00th=[ 1552], 50.00th=[ 1552], 60.00th=[ 1552], | 70.00th=[ 5269], 80.00th=[ 5269], 90.00th=[ 5269], 95.00th=[ 5269], | 99.00th=[ 5269], 99.50th=[ 5269], 99.90th=[ 5269], 99.95th=[ 5269], | 99.99th=[ 5269] bw ( KiB/s): min= 8126, max= 8175, per=100.00%, avg=8150.50, stdev=34.65, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=1.51%, ctx=50, 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=144315: Mon Jul 20 19:04:54 2026 write: IOPS=0, BW=2009KiB/s (2057kB/s)(12.0MiB/6116msec); 0 zone resets clat (msec): min=421, max=5163, avg=2022.51, stdev=2720.73 lat (msec): min=421, max=5165, avg=2023.14, stdev=2721.12 clat percentiles (msec): | 1.00th=[ 422], 5.00th=[ 422], 10.00th=[ 422], 20.00th=[ 422], | 30.00th=[ 422], 40.00th=[ 485], 50.00th=[ 485], 60.00th=[ 485], | 70.00th=[ 5134], 80.00th=[ 5134], 90.00th=[ 5134], 95.00th=[ 5134], | 99.00th=[ 5134], 99.50th=[ 5134], 99.90th=[ 5134], 99.95th=[ 5134], | 99.99th=[ 5134] bw ( KiB/s): min= 6543, max= 8062, per=100.00%, avg=7302.50, stdev=1074.10, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=66.67%, >=2000=33.33% cpu : usr=0.02%, sys=2.32%, ctx=39, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=2678KiB/s (2743kB/s), 670KiB/s-2092KiB/s (686kB/s-2142kB/s), io=16.0MiB (16.8MB), run=5875-6117msec WRITE: bw=4417KiB/s (4523kB/s), 1339KiB/s-2009KiB/s (1371kB/s-2057kB/s), io=32.0MiB (33.6MB), run=6116-7418msec