== sanity test 398b: DIO and buffer IO race ============== 17:45:28 (1786830328) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.40431 s, 7.9 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=144787: Sat Aug 15 17:48:16 2026 read: IOPS=10, BW=40.9KiB/s (41.9kB/s)(5992KiB/146365msec) clat (usec): min=34, max=553273, avg=49136.37, stdev=38648.48 lat (usec): min=34, max=553274, avg=49137.76, stdev=38648.47 clat percentiles (usec): | 1.00th=[ 51], 5.00th=[ 61], 10.00th=[ 12256], 20.00th=[ 22676], | 30.00th=[ 28705], 40.00th=[ 34866], 50.00th=[ 42206], 60.00th=[ 50594], | 70.00th=[ 58983], 80.00th=[ 71828], 90.00th=[ 93848], 95.00th=[115868], | 99.00th=[168821], 99.50th=[206570], 99.90th=[413139], 99.95th=[549454], | 99.99th=[549454] bw ( KiB/s): min= 7, max= 104, per=25.05%, avg=40.84, stdev=18.67, samples=285 iops : min= 1, max= 26, avg= 9.59, stdev= 4.71, samples=285 write: IOPS=10, BW=43.0KiB/s (44.0kB/s)(6296KiB/146365msec); 0 zone resets clat (usec): min=788, max=886986, avg=45955.82, stdev=53321.16 lat (usec): min=789, max=886988, avg=45958.38, stdev=53320.51 clat percentiles (usec): | 1.00th=[ 1172], 5.00th=[ 1352], 10.00th=[ 1745], 20.00th=[ 4228], | 30.00th=[ 9896], 40.00th=[ 21103], 50.00th=[ 32113], 60.00th=[ 43779], | 70.00th=[ 59507], 80.00th=[ 77071], 90.00th=[112722], 95.00th=[137364], | 99.00th=[212861], 99.50th=[246416], 99.90th=[534774], 99.95th=[884999], | 99.99th=[884999] bw ( KiB/s): min= 5, max= 128, per=24.87%, avg=42.53, stdev=21.20, samples=287 iops : min= 1, max= 32, avg=10.02, stdev= 5.35, samples=287 lat (usec) : 50=0.42%, 100=3.32%, 250=0.29%, 500=0.07%, 750=0.10% lat (usec) : 1000=0.13% lat (msec) : 2=5.89%, 4=3.84%, 10=5.89%, 20=7.98%, 50=34.24% lat (msec) : 100=27.44%, 250=10.09%, 500=0.20%, 750=0.07%, 1000=0.03% cpu : usr=0.06%, sys=4.52%, ctx=6457, 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=144788: Sat Aug 15 17:48:16 2026 read: IOPS=10, BW=41.5KiB/s (42.5kB/s)(5940KiB/142972msec) clat (usec): min=24, max=521902, avg=46951.93, stdev=37090.03 lat (usec): min=25, max=521904, avg=46965.70, stdev=37085.65 clat percentiles (usec): | 1.00th=[ 52], 5.00th=[ 64], 10.00th=[ 12256], 20.00th=[ 21103], | 30.00th=[ 27657], 40.00th=[ 32900], 50.00th=[ 39584], 60.00th=[ 46400], | 70.00th=[ 55313], 80.00th=[ 68682], 90.00th=[ 90702], 95.00th=[112722], | 99.00th=[175113], 99.50th=[191890], 99.90th=[308282], 99.95th=[522191], | 99.99th=[522191] bw ( KiB/s): min= 7, max= 112, per=25.70%, avg=41.89, stdev=19.57, samples=276 iops : min= 1, max= 28, avg= 9.84, stdev= 4.94, samples=276 write: IOPS=11, BW=44.4KiB/s (45.5kB/s)(6348KiB/142972msec); 0 zone resets clat (usec): min=848, max=1019.3k, avg=45815.08, stdev=55232.63 lat (usec): min=849, max=1019.3k, avg=45839.74, stdev=55241.27 clat percentiles (usec): | 1.00th=[ 1172], 5.00th=[ 1352], 10.00th=[ 1516], | 20.00th=[ 4359], 30.00th=[ 9503], 40.00th=[ 19530], | 50.00th=[ 30278], 60.00th=[ 42730], 70.00th=[ 57934], | 80.00th=[ 76022], 90.00th=[ 109577], 95.00th=[ 143655], | 99.00th=[ 221250], 99.50th=[ 274727], 99.90th=[ 350225], | 99.95th=[1019216], 99.99th=[1019216] bw ( KiB/s): min= 7, max= 119, per=25.92%, avg=44.32, stdev=20.87, samples=278 iops : min= 1, max= 29, avg=10.46, stdev= 5.26, samples=278 lat (usec) : 50=0.39%, 100=3.39%, 250=0.39%, 500=0.07%, 750=0.10% lat (usec) : 1000=0.23% lat (msec) : 2=6.35%, 4=3.12%, 10=6.61%, 20=8.95%, 50=34.96% lat (msec) : 100=25.81%, 250=9.18%, 500=0.39%, 750=0.03%, 2000=0.03% cpu : usr=0.06%, sys=4.56%, ctx=6385, 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=144789: Sat Aug 15 17:48:16 2026 read: IOPS=10, BW=41.7KiB/s (42.7kB/s)(6028KiB/144643msec) clat (usec): min=30, max=218832, avg=45507.61, stdev=32854.66 lat (usec): min=30, max=218835, avg=45509.98, stdev=32855.08 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 59], 10.00th=[ 104], 20.00th=[ 21890], | 30.00th=[ 27132], 40.00th=[ 33162], 50.00th=[ 39584], 60.00th=[ 47449], | 70.00th=[ 55313], 80.00th=[ 67634], 90.00th=[ 88605], 95.00th=[107480], | 99.00th=[154141], 99.50th=[170918], 99.90th=[198181], 99.95th=[219153], | 99.99th=[219153] bw ( KiB/s): min= 7, max= 134, per=25.84%, avg=42.11, stdev=20.05, samples=279 iops : min= 1, max= 33, avg= 9.90, stdev= 5.06, samples=279 write: IOPS=10, BW=43.3KiB/s (44.3kB/s)(6260KiB/144643msec); 0 zone resets clat (usec): min=860, max=1347.2k, avg=48292.39, stdev=61958.02 lat (usec): min=861, max=1347.2k, avg=48297.04, stdev=61959.75 clat percentiles (usec): | 1.00th=[ 1172], 5.00th=[ 1369], 10.00th=[ 1909], | 20.00th=[ 4752], 30.00th=[ 9896], 40.00th=[ 20579], | 50.00th=[ 33424], 60.00th=[ 45351], 70.00th=[ 60556], | 80.00th=[ 79168], 90.00th=[ 114820], 95.00th=[ 149947], | 99.00th=[ 225444], 99.50th=[ 329253], 99.90th=[ 501220], | 99.95th=[1350566], 99.99th=[1350566] bw ( KiB/s): min= 7, max= 112, per=25.36%, avg=43.37, stdev=19.54, samples=281 iops : min= 1, max= 28, avg=10.22, stdev= 4.93, samples=281 lat (usec) : 50=0.65%, 100=4.17%, 250=0.29%, 500=0.07%, 750=0.13% lat (usec) : 1000=0.20% lat (msec) : 2=5.37%, 4=3.61%, 10=6.54%, 20=7.81%, 50=34.80% lat (msec) : 100=26.46%, 250=9.54%, 500=0.29%, 750=0.03%, 2000=0.03% cpu : usr=0.08%, sys=4.55%, ctx=6358, 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=144790: Sat Aug 15 17:48:16 2026 read: IOPS=10, BW=41.2KiB/s (42.2kB/s)(6052KiB/146990msec) clat (usec): min=33, max=1032.8k, avg=49146.07, stdev=48612.37 lat (usec): min=33, max=1032.8k, avg=49167.07, stdev=48618.95 clat percentiles (usec): | 1.00th=[ 50], 5.00th=[ 60], 10.00th=[ 3556], | 20.00th=[ 20579], 30.00th=[ 26870], 40.00th=[ 33817], | 50.00th=[ 40109], 60.00th=[ 47449], 70.00th=[ 57410], | 80.00th=[ 70779], 90.00th=[ 95945], 95.00th=[ 120062], | 99.00th=[ 206570], 99.50th=[ 254804], 99.90th=[ 566232], | 99.95th=[1035994], 99.99th=[1035994] bw ( KiB/s): min= 5, max= 103, per=25.18%, avg=41.05, stdev=19.11, samples=285 iops : min= 1, max= 25, avg= 9.64, stdev= 4.81, samples=285 write: IOPS=10, BW=42.4KiB/s (43.4kB/s)(6236KiB/146990msec); 0 zone resets clat (usec): min=986, max=361739, avg=46254.32, stdev=48634.96 lat (usec): min=987, max=361742, avg=46266.97, stdev=48634.50 clat percentiles (usec): | 1.00th=[ 1205], 5.00th=[ 1369], 10.00th=[ 1876], 20.00th=[ 4817], | 30.00th=[ 10552], 40.00th=[ 21103], 50.00th=[ 33817], 60.00th=[ 43779], | 70.00th=[ 58983], 80.00th=[ 79168], 90.00th=[110625], 95.00th=[139461], | 99.00th=[208667], 99.50th=[250610], 99.90th=[320865], 99.95th=[362808], | 99.99th=[362808] bw ( KiB/s): min= 7, max= 111, per=24.65%, avg=42.15, stdev=18.96, samples=286 iops : min= 1, max= 27, avg= 9.92, stdev= 4.78, samples=286 lat (usec) : 50=0.55%, 100=3.68%, 250=0.23%, 500=0.10%, 750=0.20% lat (usec) : 1000=0.07% lat (msec) : 2=5.40%, 4=3.74%, 10=6.35%, 20=9.05%, 50=34.18% lat (msec) : 100=25.36%, 250=10.58%, 500=0.46%, 750=0.03%, 2000=0.03% cpu : usr=0.06%, sys=4.45%, ctx=6474, 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=163KiB/s (167kB/s), 40.9KiB/s-41.7KiB/s (41.9kB/s-42.7kB/s), io=23.4MiB (24.6MB), run=142972-146990msec WRITE: bw=171KiB/s (175kB/s), 42.4KiB/s-44.4KiB/s (43.4kB/s-45.5kB/s), io=24.6MiB (25.7MB), run=142972-146990msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144791: Sat Aug 15 17:50:50 2026 read: IOPS=5, BW=20.0KiB/s (20.5kB/s)(5992KiB/299080msec) clat (msec): min=4, max=952, avg=43.29, stdev=45.45 lat (msec): min=4, max=952, avg=43.29, stdev=45.45 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 31], 60.00th=[ 38], | 70.00th=[ 46], 80.00th=[ 58], 90.00th=[ 85], 95.00th=[ 121], | 99.00th=[ 211], 99.50th=[ 253], 99.90th=[ 409], 99.95th=[ 953], | 99.99th=[ 953] bw ( KiB/s): min= 7, max= 104, per=29.11%, avg=22.99, stdev=15.63, samples=502 iops : min= 1, max= 26, avg= 5.12, stdev= 3.95, samples=502 write: IOPS=5, BW=21.1KiB/s (21.6kB/s)(6296KiB/299080msec); 0 zone resets clat (msec): min=34, max=675, avg=148.57, stdev=77.72 lat (msec): min=34, max=675, avg=148.58, stdev=77.72 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 64], 10.00th=[ 75], 20.00th=[ 89], | 30.00th=[ 102], 40.00th=[ 115], 50.00th=[ 130], 60.00th=[ 146], | 70.00th=[ 167], 80.00th=[ 199], 90.00th=[ 243], 95.00th=[ 305], | 99.00th=[ 418], 99.50th=[ 468], 99.90th=[ 617], 99.95th=[ 676], | 99.99th=[ 676] bw ( KiB/s): min= 7, max= 56, per=25.01%, avg=20.76, stdev=10.02, samples=581 iops : min= 1, max= 14, avg= 4.56, stdev= 2.58, samples=581 lat (msec) : 10=1.95%, 20=11.36%, 50=23.50%, 100=23.34%, 250=34.90% lat (msec) : 500=4.72%, 750=0.20%, 1000=0.03% cpu : usr=0.04%, sys=1.26%, ctx=5471, 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=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=144792: Sat Aug 15 17:50:50 2026 read: IOPS=4, BW=19.8KiB/s (20.3kB/s)(5940KiB/299821msec) clat (msec): min=5, max=909, avg=43.56, stdev=45.75 lat (msec): min=5, max=909, avg=43.56, stdev=45.75 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 13], 20.00th=[ 18], | 30.00th=[ 22], 40.00th=[ 26], 50.00th=[ 32], 60.00th=[ 37], | 70.00th=[ 46], 80.00th=[ 58], 90.00th=[ 90], 95.00th=[ 120], | 99.00th=[ 203], 99.50th=[ 220], 99.90th=[ 405], 99.95th=[ 911], | 99.99th=[ 911] bw ( KiB/s): min= 7, max= 87, per=29.04%, avg=22.94, stdev=15.01, samples=499 iops : min= 1, max= 21, avg= 5.11, stdev= 3.79, samples=499 write: IOPS=5, BW=21.2KiB/s (21.7kB/s)(6348KiB/299821msec); 0 zone resets clat (msec): min=39, max=592, avg=147.86, stdev=75.19 lat (msec): min=39, max=592, avg=147.87, stdev=75.19 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 67], 10.00th=[ 75], 20.00th=[ 89], | 30.00th=[ 102], 40.00th=[ 114], 50.00th=[ 128], 60.00th=[ 146], | 70.00th=[ 167], 80.00th=[ 199], 90.00th=[ 245], 95.00th=[ 292], | 99.00th=[ 409], 99.50th=[ 456], 99.90th=[ 584], 99.95th=[ 592], | 99.99th=[ 592] bw ( KiB/s): min= 7, max= 56, per=25.41%, avg=21.09, stdev= 9.98, samples=578 iops : min= 1, max= 14, avg= 4.64, stdev= 2.57, samples=578 lat (msec) : 10=2.47%, 20=10.19%, 50=23.67%, 100=22.62%, 250=35.97% lat (msec) : 500=4.88%, 750=0.16%, 1000=0.03% cpu : usr=0.03%, sys=1.27%, ctx=5599, 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=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=144793: Sat Aug 15 17:50:50 2026 read: IOPS=5, BW=20.1KiB/s (20.6kB/s)(6028KiB/300204msec) clat (msec): min=4, max=389, avg=45.27, stdev=42.83 lat (msec): min=4, max=389, avg=45.27, stdev=42.83 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 14], 20.00th=[ 19], | 30.00th=[ 23], 40.00th=[ 28], 50.00th=[ 33], 60.00th=[ 39], | 70.00th=[ 48], 80.00th=[ 63], 90.00th=[ 93], 95.00th=[ 125], | 99.00th=[ 236], 99.50th=[ 275], 99.90th=[ 376], 99.95th=[ 388], | 99.99th=[ 388] bw ( KiB/s): min= 7, max= 87, per=28.59%, avg=22.59, stdev=15.49, samples=514 iops : min= 1, max= 21, avg= 5.03, stdev= 3.91, samples=514 write: IOPS=5, BW=20.9KiB/s (21.4kB/s)(6260KiB/300204msec); 0 zone resets clat (msec): min=36, max=1319, avg=148.02, stdev=78.94 lat (msec): min=36, max=1319, avg=148.03, stdev=78.94 clat percentiles (msec): | 1.00th=[ 51], 5.00th=[ 66], 10.00th=[ 75], 20.00th=[ 89], | 30.00th=[ 102], 40.00th=[ 116], 50.00th=[ 129], 60.00th=[ 148], | 70.00th=[ 167], 80.00th=[ 194], 90.00th=[ 249], 95.00th=[ 300], | 99.00th=[ 397], 99.50th=[ 456], 99.90th=[ 542], 99.95th=[ 1318], | 99.99th=[ 1318] bw ( KiB/s): min= 7, max= 48, per=25.14%, avg=20.87, stdev= 9.73, samples=576 iops : min= 1, max= 12, avg= 4.59, stdev= 2.51, samples=576 lat (msec) : 10=1.66%, 20=10.71%, 50=23.31%, 100=24.09%, 250=34.80% lat (msec) : 500=5.34%, 750=0.07%, 2000=0.03% cpu : usr=0.03%, sys=1.23%, ctx=5413, 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=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=144794: Sat Aug 15 17:50:50 2026 read: IOPS=5, BW=20.1KiB/s (20.6kB/s)(6052KiB/300845msec) clat (msec): min=5, max=474, avg=43.95, stdev=41.59 lat (msec): min=5, max=474, avg=43.95, stdev=41.59 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 22], 40.00th=[ 27], 50.00th=[ 32], 60.00th=[ 38], | 70.00th=[ 46], 80.00th=[ 60], 90.00th=[ 91], 95.00th=[ 129], | 99.00th=[ 205], 99.50th=[ 236], 99.90th=[ 401], 99.95th=[ 477], | 99.99th=[ 477] bw ( KiB/s): min= 7, max= 111, per=29.54%, avg=23.34, stdev=15.85, samples=500 iops : min= 1, max= 27, avg= 5.21, stdev= 4.00, samples=500 write: IOPS=5, BW=20.7KiB/s (21.2kB/s)(6236KiB/300845msec); 0 zone resets clat (msec): min=30, max=1088, avg=149.99, stdev=82.06 lat (msec): min=30, max=1088, avg=149.99, stdev=82.06 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 64], 10.00th=[ 74], 20.00th=[ 90], | 30.00th=[ 102], 40.00th=[ 116], 50.00th=[ 131], 60.00th=[ 146], | 70.00th=[ 167], 80.00th=[ 199], 90.00th=[ 249], 95.00th=[ 305], | 99.00th=[ 430], 99.50th=[ 506], 99.90th=[ 634], 99.95th=[ 1083], | 99.99th=[ 1083] bw ( KiB/s): min= 7, max= 72, per=24.75%, avg=20.54, stdev=10.30, samples=582 iops : min= 1, max= 18, avg= 4.51, stdev= 2.64, samples=582 lat (msec) : 10=2.38%, 20=10.81%, 50=24.06%, 100=22.82%, 250=34.83% lat (msec) : 500=4.82%, 750=0.26%, 2000=0.03% cpu : usr=0.03%, sys=1.22%, ctx=5507, 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=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=79.8KiB/s (81.7kB/s), 19.8KiB/s-20.1KiB/s (20.3kB/s-20.6kB/s), io=23.4MiB (24.6MB), run=299080-300845msec WRITE: bw=83.6KiB/s (85.6kB/s), 20.7KiB/s-21.2KiB/s (21.2kB/s-21.7kB/s), io=24.6MiB (25.7MB), run=299080-300845msec 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=144856: Sat Aug 15 17:51:39 2026 read: IOPS=10, BW=163KiB/s (167kB/s)(5920KiB/36408msec) clat (usec): min=37, max=309905, avg=49873.14, stdev=42075.38 lat (usec): min=38, max=309906, avg=49874.68, stdev=42075.39 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 63], 10.00th=[ 68], 20.00th=[ 676], | 30.00th=[ 27919], 40.00th=[ 35390], 50.00th=[ 43254], 60.00th=[ 52691], | 70.00th=[ 65274], 80.00th=[ 80217], 90.00th=[102237], 95.00th=[121111], | 99.00th=[189793], 99.50th=[221250], 99.90th=[308282], 99.95th=[308282], | 99.99th=[308282] bw ( KiB/s): min= 30, max= 367, per=24.76%, avg=161.94, stdev=70.13, samples=71 iops : min= 1, max= 22, avg= 9.44, stdev= 4.43, samples=71 write: IOPS=10, BW=175KiB/s (179kB/s)(6368KiB/36408msec); 0 zone resets clat (usec): min=1680, max=312931, avg=44485.42, stdev=50989.79 lat (usec): min=1682, max=312935, avg=44494.61, stdev=50991.98 clat percentiles (usec): | 1.00th=[ 1778], 5.00th=[ 2057], 10.00th=[ 2704], 20.00th=[ 5932], | 30.00th=[ 8848], 40.00th=[ 14484], 50.00th=[ 26608], 60.00th=[ 40109], | 70.00th=[ 55313], 80.00th=[ 76022], 90.00th=[107480], 95.00th=[158335], | 99.00th=[242222], 99.50th=[270533], 99.90th=[312476], 99.95th=[312476], | 99.99th=[312476] bw ( KiB/s): min= 31, max= 378, per=25.48%, avg=175.28, stdev=73.85, samples=71 iops : min= 1, max= 23, avg=10.28, stdev= 4.64, samples=71 lat (usec) : 50=0.65%, 100=7.68%, 250=0.52%, 500=0.39%, 750=0.39% lat (usec) : 1000=0.13% lat (msec) : 2=2.60%, 4=4.82%, 10=9.64%, 20=7.29%, 50=28.39% lat (msec) : 100=25.91%, 250=11.20%, 500=0.39% cpu : usr=0.07%, sys=4.91%, ctx=1505, 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=144857: Sat Aug 15 17:51:39 2026 read: IOPS=10, BW=165KiB/s (169kB/s)(5744KiB/34813msec) clat (usec): min=39, max=344125, avg=50038.10, stdev=42699.57 lat (usec): min=39, max=344126, avg=50043.95, stdev=42704.73 clat percentiles (usec): | 1.00th=[ 43], 5.00th=[ 62], 10.00th=[ 73], 20.00th=[ 6194], | 30.00th=[ 30016], 40.00th=[ 38536], 50.00th=[ 44303], 60.00th=[ 52691], | 70.00th=[ 63177], 80.00th=[ 74974], 90.00th=[ 99091], 95.00th=[125305], | 99.00th=[204473], 99.50th=[250610], 99.90th=[346031], 99.95th=[346031], | 99.99th=[346031] bw ( KiB/s): min= 45, max= 447, per=25.28%, avg=165.31, stdev=74.13, samples=68 iops : min= 2, max= 27, avg= 9.63, stdev= 4.70, samples=68 write: IOPS=11, BW=188KiB/s (192kB/s)(6544KiB/34813msec); 0 zone resets clat (usec): min=1397, max=341143, avg=40663.23, stdev=42864.48 lat (usec): min=1400, max=341144, avg=40672.94, stdev=42867.32 clat percentiles (usec): | 1.00th=[ 1844], 5.00th=[ 2180], 10.00th=[ 2999], 20.00th=[ 6259], | 30.00th=[ 10028], 40.00th=[ 15926], 50.00th=[ 25297], 60.00th=[ 38011], | 70.00th=[ 53740], 80.00th=[ 70779], 90.00th=[ 91751], 95.00th=[129500], | 99.00th=[177210], 99.50th=[214959], 99.90th=[341836], 99.95th=[341836], | 99.99th=[341836] bw ( KiB/s): min= 31, max= 410, per=27.27%, avg=187.63, stdev=88.86, samples=68 iops : min= 1, max= 25, avg=11.03, stdev= 5.56, samples=68 lat (usec) : 50=1.04%, 100=6.51%, 250=1.30%, 500=0.13% lat (msec) : 2=1.56%, 4=5.08%, 10=9.64%, 20=7.81%, 50=29.17% lat (msec) : 100=28.78%, 250=8.59%, 500=0.39% cpu : usr=0.07%, sys=5.28%, ctx=1488, 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=144859: Sat Aug 15 17:51:39 2026 read: IOPS=10, BW=171KiB/s (175kB/s)(6256KiB/36618msec) clat (usec): min=37, max=263754, avg=51276.76, stdev=41516.54 lat (usec): min=37, max=263756, avg=51296.50, stdev=41511.66 clat percentiles (usec): | 1.00th=[ 40], 5.00th=[ 61], 10.00th=[ 71], 20.00th=[ 14091], | 30.00th=[ 32375], 40.00th=[ 39060], 50.00th=[ 46400], 60.00th=[ 53216], | 70.00th=[ 63701], 80.00th=[ 81265], 90.00th=[107480], 95.00th=[128451], | 99.00th=[175113], 99.50th=[212861], 99.90th=[263193], 99.95th=[263193], | 99.99th=[263193] bw ( KiB/s): min= 30, max= 348, per=26.24%, avg=171.63, stdev=74.57, samples=71 iops : min= 1, max= 21, avg=10.04, stdev= 4.66, samples=71 write: IOPS=10, BW=165KiB/s (169kB/s)(6032KiB/36618msec); 0 zone resets clat (usec): min=1658, max=282394, avg=43396.20, stdev=47660.18 lat (usec): min=1659, max=282397, avg=43401.21, stdev=47658.38 clat percentiles (usec): | 1.00th=[ 1844], 5.00th=[ 2114], 10.00th=[ 3064], 20.00th=[ 5932], | 30.00th=[ 9241], 40.00th=[ 15533], 50.00th=[ 25822], 60.00th=[ 41681], | 70.00th=[ 55313], 80.00th=[ 77071], 90.00th=[106431], 95.00th=[132645], | 99.00th=[229639], 99.50th=[258999], 99.90th=[283116], 99.95th=[283116], | 99.99th=[283116] bw ( KiB/s): min= 32, max= 415, per=23.54%, avg=161.93, stdev=86.93, samples=71 iops : min= 2, max= 25, avg= 9.44, stdev= 5.45, samples=71 lat (usec) : 50=1.04%, 100=7.03%, 250=1.30%, 750=0.26%, 1000=0.26% lat (msec) : 2=2.08%, 4=4.69%, 10=9.24%, 20=7.29%, 50=28.13% lat (msec) : 100=26.69%, 250=11.46%, 500=0.52% cpu : usr=0.09%, sys=4.85%, ctx=1521, 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=144860: Sat Aug 15 17:51:39 2026 read: IOPS=10, BW=170KiB/s (174kB/s)(6032KiB/35453msec) clat (usec): min=25, max=523222, avg=54722.67, stdev=56927.79 lat (usec): min=26, max=523224, avg=54734.61, stdev=56938.27 clat percentiles (usec): | 1.00th=[ 45], 5.00th=[ 64], 10.00th=[ 73], 20.00th=[ 16319], | 30.00th=[ 30016], 40.00th=[ 38011], 50.00th=[ 46400], 60.00th=[ 55313], | 70.00th=[ 63701], 80.00th=[ 81265], 90.00th=[100140], 95.00th=[130548], | 99.00th=[263193], 99.50th=[442500], 99.90th=[522191], 99.95th=[522191], | 99.99th=[522191] bw ( KiB/s): min= 31, max= 347, per=26.44%, avg=172.93, stdev=73.35, samples=68 iops : min= 1, max= 21, avg=10.12, stdev= 4.64, samples=68 write: IOPS=11, BW=176KiB/s (181kB/s)(6256KiB/35453msec); 0 zone resets clat (usec): min=1124, max=407642, avg=37677.29, stdev=45824.44 lat (usec): min=1126, max=407645, avg=37686.51, stdev=45828.25 clat percentiles (usec): | 1.00th=[ 1663], 5.00th=[ 2073], 10.00th=[ 3326], 20.00th=[ 5997], | 30.00th=[ 9503], 40.00th=[ 13960], 50.00th=[ 20317], 60.00th=[ 31065], | 70.00th=[ 44303], 80.00th=[ 61604], 90.00th=[ 92799], 95.00th=[115868], | 99.00th=[212861], 99.50th=[312476], 99.90th=[408945], 99.95th=[408945], | 99.99th=[408945] bw ( KiB/s): min= 31, max= 475, per=25.82%, avg=177.61, stdev=70.97, samples=69 iops : min= 1, max= 29, avg=10.41, stdev= 4.46, samples=69 lat (usec) : 50=0.65%, 100=6.64%, 250=1.04%, 500=0.39%, 750=0.26% lat (msec) : 2=2.60%, 4=4.17%, 10=9.11%, 20=10.68%, 50=26.95% lat (msec) : 100=28.26%, 250=8.33%, 500=0.78%, 750=0.13% cpu : usr=0.06%, sys=4.81%, ctx=1405, 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=654KiB/s (670kB/s), 163KiB/s-171KiB/s (167kB/s-175kB/s), io=23.4MiB (24.5MB), run=34813-36618msec WRITE: bw=688KiB/s (705kB/s), 165KiB/s-188KiB/s (169kB/s-192kB/s), io=24.6MiB (25.8MB), run=34813-36618msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144861: Sat Aug 15 17:52:21 2026 read: IOPS=4, BW=76.5KiB/s (78.4kB/s)(5920KiB/77359msec) clat (msec): min=5, max=472, avg=43.01, stdev=46.21 lat (msec): min=5, max=472, avg=43.01, stdev=46.21 clat percentiles (msec): | 1.00th=[ 10], 5.00th=[ 13], 10.00th=[ 15], 20.00th=[ 18], | 30.00th=[ 21], 40.00th=[ 24], 50.00th=[ 28], 60.00th=[ 32], | 70.00th=[ 41], 80.00th=[ 55], 90.00th=[ 93], 95.00th=[ 138], | 99.00th=[ 205], 99.50th=[ 288], 99.90th=[ 472], 99.95th=[ 472], | 99.99th=[ 472] bw ( KiB/s): min= 30, max= 287, per=28.19%, avg=86.56, stdev=53.45, samples=135 iops : min= 1, max= 17, avg= 4.62, stdev= 3.40, samples=135 write: IOPS=5, BW=82.3KiB/s (84.3kB/s)(6368KiB/77359msec); 0 zone resets clat (msec): min=35, max=481, avg=153.55, stdev=81.32 lat (msec): min=35, max=481, avg=153.56, stdev=81.32 clat percentiles (msec): | 1.00th=[ 49], 5.00th=[ 65], 10.00th=[ 78], 20.00th=[ 90], | 30.00th=[ 103], 40.00th=[ 115], 50.00th=[ 128], 60.00th=[ 148], | 70.00th=[ 176], 80.00th=[ 205], 90.00th=[ 275], 95.00th=[ 313], | 99.00th=[ 430], 99.50th=[ 468], 99.90th=[ 481], 99.95th=[ 481], | 99.99th=[ 481] bw ( KiB/s): min= 30, max= 192, per=26.23%, avg=84.71, stdev=40.80, samples=148 iops : min= 1, max= 12, avg= 4.49, stdev= 2.65, samples=148 lat (msec) : 10=0.65%, 20=13.54%, 50=23.70%, 100=20.57%, 250=34.64% lat (msec) : 500=6.90% cpu : usr=0.04%, sys=1.24%, ctx=1328, 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=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=144862: Sat Aug 15 17:52:21 2026 read: IOPS=4, BW=73.9KiB/s (75.7kB/s)(5744KiB/77684msec) clat (msec): min=6, max=255, avg=42.70, stdev=42.61 lat (msec): min=6, max=255, avg=42.71, stdev=42.61 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 28], 60.00th=[ 32], | 70.00th=[ 41], 80.00th=[ 57], 90.00th=[ 100], 95.00th=[ 142], | 99.00th=[ 207], 99.50th=[ 228], 99.90th=[ 255], 99.95th=[ 255], | 99.99th=[ 255] bw ( KiB/s): min= 30, max= 287, per=29.72%, avg=91.24, stdev=55.94, samples=123 iops : min= 1, max= 17, avg= 4.91, stdev= 3.56, samples=123 write: IOPS=5, BW=84.2KiB/s (86.3kB/s)(6544KiB/77684msec); 0 zone resets clat (msec): min=46, max=618, avg=151.51, stdev=79.18 lat (msec): min=46, max=618, avg=151.51, stdev=79.18 clat percentiles (msec): | 1.00th=[ 52], 5.00th=[ 69], 10.00th=[ 79], 20.00th=[ 94], | 30.00th=[ 105], 40.00th=[ 115], 50.00th=[ 132], 60.00th=[ 146], | 70.00th=[ 171], 80.00th=[ 203], 90.00th=[ 247], 95.00th=[ 305], | 99.00th=[ 472], 99.50th=[ 518], 99.90th=[ 617], 99.95th=[ 617], | 99.99th=[ 617] bw ( KiB/s): min= 30, max= 223, per=26.21%, avg=84.67, stdev=41.90, samples=151 iops : min= 1, max= 13, avg= 4.49, stdev= 2.71, samples=151 lat (msec) : 10=1.69%, 20=13.41%, 50=21.61%, 100=19.66%, 250=38.54% lat (msec) : 500=4.69%, 750=0.39% cpu : usr=0.04%, sys=1.20%, ctx=1315, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144863: Sat Aug 15 17:52:21 2026 read: IOPS=5, BW=84.2KiB/s (86.2kB/s)(6256KiB/74287msec) clat (msec): min=6, max=469, avg=42.24, stdev=49.37 lat (msec): min=6, max=469, avg=42.24, stdev=49.37 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 32], | 70.00th=[ 41], 80.00th=[ 56], 90.00th=[ 88], 95.00th=[ 133], | 99.00th=[ 253], 99.50th=[ 414], 99.90th=[ 468], 99.95th=[ 468], | 99.99th=[ 468] bw ( KiB/s): min= 30, max= 383, per=31.68%, avg=97.27, stdev=70.97, samples=127 iops : min= 1, max= 23, avg= 5.29, stdev= 4.49, samples=127 write: IOPS=5, BW=81.2KiB/s (83.1kB/s)(6032KiB/74287msec); 0 zone resets clat (msec): min=30, max=488, avg=152.83, stdev=82.34 lat (msec): min=30, max=488, avg=152.83, stdev=82.34 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 62], 10.00th=[ 70], 20.00th=[ 87], | 30.00th=[ 103], 40.00th=[ 117], 50.00th=[ 133], 60.00th=[ 148], | 70.00th=[ 174], 80.00th=[ 209], 90.00th=[ 264], 95.00th=[ 326], | 99.00th=[ 456], 99.50th=[ 477], 99.90th=[ 489], 99.95th=[ 489], | 99.99th=[ 489] bw ( KiB/s): min= 30, max= 191, per=25.69%, avg=82.99, stdev=40.43, samples=143 iops : min= 1, max= 11, avg= 4.38, stdev= 2.62, samples=143 lat (msec) : 10=2.86%, 20=14.97%, 50=21.61%, 100=20.83%, 250=33.20% lat (msec) : 500=6.51% cpu : usr=0.04%, sys=1.28%, 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=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=144864: Sat Aug 15 17:52:21 2026 read: IOPS=4, BW=77.5KiB/s (79.4kB/s)(6032KiB/77832msec) clat (msec): min=7, max=320, avg=43.95, stdev=46.93 lat (msec): min=7, max=320, avg=43.95, stdev=46.93 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 12], 10.00th=[ 13], 20.00th=[ 17], | 30.00th=[ 20], 40.00th=[ 23], 50.00th=[ 27], 60.00th=[ 32], | 70.00th=[ 38], 80.00th=[ 61], 90.00th=[ 103], 95.00th=[ 140], | 99.00th=[ 247], 99.50th=[ 271], 99.90th=[ 321], 99.95th=[ 321], | 99.99th=[ 321] bw ( KiB/s): min= 30, max= 287, per=30.71%, avg=94.27, stdev=61.72, samples=125 iops : min= 1, max= 17, avg= 5.10, stdev= 3.88, samples=125 write: IOPS=5, BW=80.4KiB/s (82.3kB/s)(6256KiB/77832msec); 0 zone resets clat (msec): min=42, max=623, avg=155.26, stdev=82.34 lat (msec): min=42, max=623, avg=155.27, stdev=82.34 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 70], 10.00th=[ 80], 20.00th=[ 94], | 30.00th=[ 106], 40.00th=[ 120], 50.00th=[ 136], 60.00th=[ 155], | 70.00th=[ 171], 80.00th=[ 194], 90.00th=[ 257], 95.00th=[ 313], | 99.00th=[ 460], 99.50th=[ 575], 99.90th=[ 625], 99.95th=[ 625], | 99.99th=[ 625] bw ( KiB/s): min= 30, max= 191, per=25.82%, avg=83.41, stdev=38.16, samples=148 iops : min= 1, max= 11, avg= 4.41, stdev= 2.49, samples=148 lat (msec) : 10=1.17%, 20=14.58%, 50=22.01%, 100=18.88%, 250=37.37% lat (msec) : 500=5.60%, 750=0.39% cpu : usr=0.03%, sys=1.16%, ctx=1274, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=308KiB/s (315kB/s), 73.9KiB/s-84.2KiB/s (75.7kB/s-86.2kB/s), io=23.4MiB (24.5MB), run=74287-77832msec WRITE: bw=324KiB/s (332kB/s), 80.4KiB/s-84.2KiB/s (82.3kB/s-86.3kB/s), io=24.6MiB (25.8MB), run=74287-77832msec 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=144884: Sat Aug 15 17:52:38 2026 read: IOPS=1, BW=1577KiB/s (1615kB/s)(7168KiB/4545msec) clat (msec): min=133, max=656, avg=313.78, stdev=194.96 lat (msec): min=133, max=656, avg=313.78, stdev=194.96 clat percentiles (msec): | 1.00th=[ 134], 5.00th=[ 134], 10.00th=[ 134], 20.00th=[ 138], | 30.00th=[ 186], 40.00th=[ 186], 50.00th=[ 249], 60.00th=[ 368], | 70.00th=[ 368], 80.00th=[ 468], 90.00th=[ 659], 95.00th=[ 659], | 99.00th=[ 659], 99.50th=[ 659], 99.90th=[ 659], 99.95th=[ 659], | 99.99th=[ 659] bw ( KiB/s): min= 1703, max= 2043, per=50.50%, avg=1914.33, stdev=132.53, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 write: IOPS=1, BW=1127KiB/s (1154kB/s)(5120KiB/4545msec); 0 zone resets clat (msec): min=131, max=782, avg=432.67, stdev=249.44 lat (msec): min=131, max=782, avg=433.72, stdev=249.91 clat percentiles (msec): | 1.00th=[ 132], 5.00th=[ 132], 10.00th=[ 132], 20.00th=[ 132], | 30.00th=[ 271], 40.00th=[ 271], 50.00th=[ 447], 60.00th=[ 447], | 70.00th=[ 531], 80.00th=[ 531], 90.00th=[ 785], 95.00th=[ 785], | 99.00th=[ 785], 99.50th=[ 785], 99.90th=[ 785], 99.95th=[ 785], | 99.99th=[ 785] bw ( KiB/s): min= 2000, max= 2043, per=38.12%, avg=2023.25, stdev=18.34, samples=4 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=4 lat (msec) : 250=41.67%, 500=33.33%, 750=16.67%, 1000=8.33% cpu : usr=0.00%, sys=3.19%, ctx=57, 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=144886: Sat Aug 15 17:52:38 2026 read: IOPS=0, BW=390KiB/s (399kB/s)(2048KiB/5257msec) clat (msec): min=140, max=147, avg=143.80, stdev= 4.90 lat (msec): min=140, max=147, avg=143.81, stdev= 4.90 clat percentiles (msec): | 1.00th=[ 140], 5.00th=[ 140], 10.00th=[ 140], 20.00th=[ 140], | 30.00th=[ 140], 40.00th=[ 140], 50.00th=[ 140], 60.00th=[ 148], | 70.00th=[ 148], 80.00th=[ 148], 90.00th=[ 148], 95.00th=[ 148], | 99.00th=[ 148], 99.50th=[ 148], 99.90th=[ 148], 99.95th=[ 148], | 99.99th=[ 148] bw ( KiB/s): min= 1878, max= 2031, per=51.56%, avg=1954.50, stdev=108.19, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1948KiB/s (1995kB/s)(10.0MiB/5257msec); 0 zone resets clat (msec): min=192, max=1160, avg=474.15, stdev=348.83 lat (msec): min=192, max=1160, avg=474.26, stdev=348.82 clat percentiles (msec): | 1.00th=[ 192], 5.00th=[ 192], 10.00th=[ 192], 20.00th=[ 236], | 30.00th=[ 249], 40.00th=[ 279], 50.00th=[ 279], 60.00th=[ 338], | 70.00th=[ 351], 80.00th=[ 634], 90.00th=[ 1020], 95.00th=[ 1167], | 99.00th=[ 1167], 99.50th=[ 1167], 99.90th=[ 1167], 99.95th=[ 1167], | 99.99th=[ 1167] bw ( KiB/s): min= 1896, max= 4071, per=48.74%, avg=2587.29, stdev=1003.89, samples=7 iops : min= 1, max= 3, avg= 1.57, stdev= 0.98, samples=7 lat (msec) : 250=41.67%, 500=33.33%, 750=8.33%, 2000=16.67% cpu : usr=0.02%, sys=3.56%, ctx=87, 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=144888: Sat Aug 15 17:52:38 2026 read: IOPS=1, BW=1138KiB/s (1165kB/s)(6144KiB/5401msec) clat (msec): min=85, max=714, avg=290.36, stdev=228.50 lat (msec): min=85, max=714, avg=290.36, stdev=228.50 clat percentiles (msec): | 1.00th=[ 86], 5.00th=[ 86], 10.00th=[ 86], 20.00th=[ 101], | 30.00th=[ 101], 40.00th=[ 251], 50.00th=[ 251], 60.00th=[ 264], | 70.00th=[ 326], 80.00th=[ 326], 90.00th=[ 718], 95.00th=[ 718], | 99.00th=[ 718], 99.50th=[ 718], 99.90th=[ 718], 99.95th=[ 718], | 99.99th=[ 718] bw ( KiB/s): min= 2019, max= 4063, per=66.92%, avg=2537.00, stdev=1017.36, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 write: IOPS=1, BW=1138KiB/s (1165kB/s)(6144KiB/5401msec); 0 zone resets clat (msec): min=250, max=1193, avg=601.83, stdev=458.25 lat (msec): min=251, max=1193, avg=601.95, stdev=458.26 clat percentiles (msec): | 1.00th=[ 251], 5.00th=[ 251], 10.00th=[ 251], 20.00th=[ 305], | 30.00th=[ 305], 40.00th=[ 309], 50.00th=[ 309], 60.00th=[ 363], | 70.00th=[ 1183], 80.00th=[ 1183], 90.00th=[ 1200], 95.00th=[ 1200], | 99.00th=[ 1200], 99.50th=[ 1200], 99.90th=[ 1200], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 2000, max= 3250, per=43.82%, avg=2326.00, stdev=616.17, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (msec) : 100=8.33%, 250=8.33%, 500=58.33%, 750=8.33%, 2000=16.67% cpu : usr=0.09%, sys=2.30%, ctx=52, 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=144890: Sat Aug 15 17:52:38 2026 read: IOPS=1, BW=1276KiB/s (1306kB/s)(5120KiB/4013msec) clat (msec): min=157, max=312, avg=229.68, stdev=66.26 lat (msec): min=157, max=312, avg=229.68, stdev=66.26 clat percentiles (msec): | 1.00th=[ 159], 5.00th=[ 159], 10.00th=[ 159], 20.00th=[ 159], | 30.00th=[ 180], 40.00th=[ 180], 50.00th=[ 218], 60.00th=[ 218], | 70.00th=[ 284], 80.00th=[ 284], 90.00th=[ 313], 95.00th=[ 313], | 99.00th=[ 313], 99.50th=[ 313], 99.90th=[ 313], 99.95th=[ 313], | 99.99th=[ 313] bw ( KiB/s): min= 2019, max= 3650, per=67.70%, avg=2566.67, stdev=938.21, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 write: IOPS=1, BW=1786KiB/s (1829kB/s)(7168KiB/4013msec); 0 zone resets clat (msec): min=283, max=586, avg=396.57, stdev=96.12 lat (msec): min=283, max=586, avg=396.68, stdev=96.12 clat percentiles (msec): | 1.00th=[ 284], 5.00th=[ 284], 10.00th=[ 284], 20.00th=[ 347], | 30.00th=[ 351], 40.00th=[ 351], 50.00th=[ 380], 60.00th=[ 397], | 70.00th=[ 397], 80.00th=[ 439], 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= 1777, max= 2043, per=37.08%, avg=1968.17, stdev=109.07, samples=6 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=6 lat (msec) : 250=25.00%, 500=66.67%, 750=8.33% cpu : usr=0.00%, sys=3.56%, ctx=79, 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=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=3792KiB/s (3883kB/s), 390KiB/s-1577KiB/s (399kB/s-1615kB/s), io=20.0MiB (20.0MB), run=4013-5401msec WRITE: bw=5309KiB/s (5436kB/s), 1127KiB/s-1948KiB/s (1154kB/s-1995kB/s), io=28.0MiB (29.4MB), run=4013-5401msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144885: Sat Aug 15 17:52:38 2026 read: IOPS=1, BW=1895KiB/s (1941kB/s)(7168KiB/3782msec) clat (usec): min=501, max=612874, avg=270108.98, stdev=180664.27 lat (usec): min=503, max=612876, avg=270110.50, stdev=180664.28 clat percentiles (usec): | 1.00th=[ 502], 5.00th=[ 502], 10.00th=[ 502], 20.00th=[200279], | 30.00th=[252707], 40.00th=[252707], 50.00th=[258999], 60.00th=[278922], | 70.00th=[278922], 80.00th=[287310], 90.00th=[616563], 95.00th=[616563], | 99.00th=[616563], 99.50th=[616563], 99.90th=[616563], 99.95th=[616563], | 99.99th=[616563] bw ( KiB/s): min= 2023, max= 4039, per=74.68%, avg=2826.50, stdev=979.66, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=1, BW=1354KiB/s (1386kB/s)(5120KiB/3782msec); 0 zone resets clat (msec): min=221, max=787, avg=364.86, stdev=241.17 lat (msec): min=221, max=788, avg=365.31, stdev=240.89 clat percentiles (msec): | 1.00th=[ 222], 5.00th=[ 222], 10.00th=[ 222], 20.00th=[ 222], | 30.00th=[ 230], 40.00th=[ 230], 50.00th=[ 245], 60.00th=[ 245], | 70.00th=[ 338], 80.00th=[ 338], 90.00th=[ 785], 95.00th=[ 785], | 99.00th=[ 785], 99.50th=[ 785], 99.90th=[ 785], 99.95th=[ 785], | 99.99th=[ 785] bw ( KiB/s): min= 2023, max= 3637, per=48.43%, avg=2566.33, stdev=927.26, samples=3 iops : min= 1, max= 3, avg= 1.67, stdev= 1.15, samples=3 lat (usec) : 750=8.33% lat (msec) : 250=33.33%, 500=41.67%, 750=8.33%, 1000=8.33% cpu : usr=0.03%, sys=11.45%, ctx=263, 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=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=144887: Sat Aug 15 17:52:38 2026 read: IOPS=0, BW=379KiB/s (388kB/s)(2048KiB/5410msec) clat (usec): min=806, max=308079, avg=154443.34, stdev=217274.64 lat (usec): min=808, max=308082, avg=154445.22, stdev=217275.36 clat percentiles (usec): | 1.00th=[ 807], 5.00th=[ 807], 10.00th=[ 807], 20.00th=[ 807], | 30.00th=[ 807], 40.00th=[ 807], 50.00th=[ 807], 60.00th=[308282], | 70.00th=[308282], 80.00th=[308282], 90.00th=[308282], 95.00th=[308282], | 99.00th=[308282], 99.50th=[308282], 99.90th=[308282], 99.95th=[308282], | 99.99th=[308282] bw ( KiB/s): min= 2011, max= 2039, per=53.50%, avg=2025.00, stdev=19.80, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1893KiB/s (1938kB/s)(10.0MiB/5410msec); 0 zone resets clat (msec): min=148, max=1200, avg=476.49, stdev=316.91 lat (msec): min=148, max=1200, avg=478.66, stdev=318.44 clat percentiles (msec): | 1.00th=[ 148], 5.00th=[ 148], 10.00th=[ 148], 20.00th=[ 180], | 30.00th=[ 239], 40.00th=[ 279], 50.00th=[ 368], 60.00th=[ 506], | 70.00th=[ 518], 80.00th=[ 651], 90.00th=[ 684], 95.00th=[ 1200], | 99.00th=[ 1200], 99.50th=[ 1200], 99.90th=[ 1200], 99.95th=[ 1200], | 99.99th=[ 1200] bw ( KiB/s): min= 2011, max= 4047, per=56.90%, avg=3015.33, stdev=1093.39, samples=6 iops : min= 1, max= 3, avg= 2.00, stdev= 1.10, samples=6 lat (usec) : 1000=8.33% lat (msec) : 250=25.00%, 500=25.00%, 750=33.33%, 2000=8.33% cpu : usr=0.00%, sys=9.10%, ctx=142, 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=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=144889: Sat Aug 15 17:52:38 2026 read: IOPS=1, BW=1472KiB/s (1507kB/s)(6144KiB/4174msec) clat (usec): min=1589, max=334290, avg=85598.81, stdev=138164.38 lat (usec): min=1590, max=334292, avg=85600.21, stdev=138164.49 clat percentiles (usec): | 1.00th=[ 1598], 5.00th=[ 1598], 10.00th=[ 1598], 20.00th=[ 2802], | 30.00th=[ 2802], 40.00th=[ 3130], 50.00th=[ 3130], 60.00th=[ 5669], | 70.00th=[166724], 80.00th=[166724], 90.00th=[333448], 95.00th=[333448], | 99.00th=[333448], 99.50th=[333448], 99.90th=[333448], 99.95th=[333448], | 99.99th=[333448] bw ( KiB/s): min= 2023, max= 4023, per=85.28%, avg=3227.67, stdev=1060.97, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 write: IOPS=1, BW=1472KiB/s (1507kB/s)(6144KiB/4174msec); 0 zone resets clat (msec): min=206, max=1510, avg=585.55, stdev=506.61 lat (msec): min=206, max=1510, avg=585.89, stdev=506.45 clat percentiles (msec): | 1.00th=[ 207], 5.00th=[ 207], 10.00th=[ 207], 20.00th=[ 268], | 30.00th=[ 268], 40.00th=[ 317], 50.00th=[ 317], 60.00th=[ 372], | 70.00th=[ 844], 80.00th=[ 844], 90.00th=[ 1519], 95.00th=[ 1519], | 99.00th=[ 1519], 99.50th=[ 1519], 99.90th=[ 1519], 99.95th=[ 1519], | 99.99th=[ 1519] bw ( KiB/s): min= 1818, max= 2039, per=36.68%, avg=1943.80, stdev=110.78, samples=5 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=5 lat (msec) : 2=8.33%, 4=16.67%, 10=8.33%, 250=16.67%, 500=33.33% lat (msec) : 1000=8.33%, 2000=8.33% cpu : usr=0.00%, sys=8.20%, ctx=118, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=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=144891: Sat Aug 15 17:52:38 2026 read: IOPS=1, BW=1179KiB/s (1207kB/s)(5120KiB/4342msec) clat (usec): min=587, max=369617, avg=186486.58, stdev=173851.03 lat (usec): min=589, max=369619, avg=186487.98, stdev=173851.02 clat percentiles (usec): | 1.00th=[ 586], 5.00th=[ 586], 10.00th=[ 586], 20.00th=[ 586], | 30.00th=[ 742], 40.00th=[ 742], 50.00th=[265290], 60.00th=[265290], | 70.00th=[295699], 80.00th=[295699], 90.00th=[371196], 95.00th=[371196], | 99.00th=[371196], 99.50th=[371196], 99.90th=[371196], 99.95th=[371196], | 99.99th=[371196] bw ( KiB/s): min= 2023, max= 6035, per=100.00%, avg=4029.00, stdev=2836.91, samples=2 iops : min= 1, max= 5, avg= 3.00, stdev= 2.83, samples=2 write: IOPS=1, BW=1651KiB/s (1690kB/s)(7168KiB/4342msec); 0 zone resets clat (msec): min=251, max=1255, avg=443.48, stdev=363.78 lat (msec): min=256, max=1255, avg=444.27, stdev=363.36 clat percentiles (msec): | 1.00th=[ 253], 5.00th=[ 253], 10.00th=[ 253], 20.00th=[ 259], | 30.00th=[ 262], 40.00th=[ 262], 50.00th=[ 288], 60.00th=[ 376], | 70.00th=[ 376], 80.00th=[ 414], 90.00th=[ 1250], 95.00th=[ 1250], | 99.00th=[ 1250], 99.50th=[ 1250], 99.90th=[ 1250], 99.95th=[ 1250], | 99.99th=[ 1250] bw ( KiB/s): min= 2019, max= 3703, per=53.77%, avg=2849.50, stdev=947.85, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 lat (usec) : 750=16.67% lat (msec) : 500=75.00%, 2000=8.33% cpu : usr=0.00%, sys=8.82%, ctx=216, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=3786KiB/s (3876kB/s), 379KiB/s-1895KiB/s (388kB/s-1941kB/s), io=20.0MiB (20.0MB), run=3782-5410msec WRITE: bw=5300KiB/s (5427kB/s), 1354KiB/s-1893KiB/s (1386kB/s-1938kB/s), io=28.0MiB (29.4MB), run=3782-5410msec 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=144899: Sat Aug 15 17:52:53 2026 read: IOPS=1, BW=7178KiB/s (7350kB/s)(12.0MiB/1712msec) clat (msec): min=279, max=916, avg=520.52, stdev=345.64 lat (msec): min=279, max=916, avg=520.53, stdev=345.64 clat percentiles (msec): | 1.00th=[ 279], 5.00th=[ 279], 10.00th=[ 279], 20.00th=[ 279], | 30.00th=[ 279], 40.00th=[ 368], 50.00th=[ 368], 60.00th=[ 368], | 70.00th=[ 919], 80.00th=[ 919], 90.00th=[ 919], 95.00th=[ 919], | 99.00th=[ 919], 99.50th=[ 919], 99.90th=[ 919], 99.95th=[ 919], | 99.99th=[ 919] bw ( KiB/s): min= 7406, max= 7892, per=100.00%, avg=7649.00, stdev=343.65, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=66.67%, 1000=33.33% cpu : usr=0.00%, sys=8.77%, ctx=57, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144900: Sat Aug 15 17:52:53 2026 read: IOPS=0, BW=972KiB/s (996kB/s)(4096KiB/4212msec) clat (nsec): min=1104.4M, max=1104.4M, avg=1104441545.00, stdev= 0.00 lat (nsec): min=1104.4M, max=1104.4M, avg=1104444840.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1099], 5.00th=[ 1099], 10.00th=[ 1099], 20.00th=[ 1099], | 30.00th=[ 1099], 40.00th=[ 1099], 50.00th=[ 1099], 60.00th=[ 1099], | 70.00th=[ 1099], 80.00th=[ 1099], 90.00th=[ 1099], 95.00th=[ 1099], | 99.00th=[ 1099], 99.50th=[ 1099], 99.90th=[ 1099], 99.95th=[ 1099], | 99.99th=[ 1099] bw ( KiB/s): min= 8062, max= 8062, per=100.00%, avg=8062.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=1945KiB/s (1992kB/s)(8192KiB/4212msec); 0 zone resets clat (msec): min=916, max=2023, avg=1470.04, stdev=782.38 lat (msec): min=920, max=2033, avg=1476.90, stdev=786.69 clat percentiles (msec): | 1.00th=[ 919], 5.00th=[ 919], 10.00th=[ 919], 20.00th=[ 919], | 30.00th=[ 919], 40.00th=[ 919], 50.00th=[ 919], 60.00th=[ 2022], | 70.00th=[ 2022], 80.00th=[ 2022], 90.00th=[ 2022], 95.00th=[ 2022], | 99.00th=[ 2022], 99.50th=[ 2022], 99.90th=[ 2022], 99.95th=[ 2022], | 99.99th=[ 2022] bw ( KiB/s): min= 8031, max= 8031, per=100.00%, avg=8031.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 1000=33.33%, 2000=33.33%, >=2000=33.33% cpu : usr=0.00%, sys=2.33%, ctx=58, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144901: Sat Aug 15 17:52:53 2026 write: IOPS=0, BW=3337KiB/s (3417kB/s)(12.0MiB/3682msec); 0 zone resets clat (msec): min=411, max=1749, avg=1160.31, stdev=683.02 lat (msec): min=412, max=1762, avg=1164.67, stdev=688.19 clat percentiles (msec): | 1.00th=[ 414], 5.00th=[ 414], 10.00th=[ 414], 20.00th=[ 414], | 30.00th=[ 414], 40.00th=[ 1318], 50.00th=[ 1318], 60.00th=[ 1318], | 70.00th=[ 1754], 80.00th=[ 1754], 90.00th=[ 1754], 95.00th=[ 1754], | 99.00th=[ 1754], 99.50th=[ 1754], 99.90th=[ 1754], 99.95th=[ 1754], | 99.99th=[ 1754] bw ( KiB/s): min= 8000, max= 8031, per=100.00%, avg=8015.50, stdev=21.92, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.05%, sys=3.75%, ctx=59, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144902: Sat Aug 15 17:52:53 2026 write: IOPS=1, BW=4708KiB/s (4821kB/s)(12.0MiB/2610msec); 0 zone resets clat (msec): min=470, max=1428, avg=829.15, stdev=522.59 lat (msec): min=473, max=1430, avg=830.85, stdev=522.41 clat percentiles (msec): | 1.00th=[ 472], 5.00th=[ 472], 10.00th=[ 472], 20.00th=[ 472], | 30.00th=[ 472], 40.00th=[ 592], 50.00th=[ 592], 60.00th=[ 592], | 70.00th=[ 1435], 80.00th=[ 1435], 90.00th=[ 1435], 95.00th=[ 1435], | 99.00th=[ 1435], 99.50th=[ 1435], 99.90th=[ 1435], 99.95th=[ 1435], | 99.99th=[ 1435] bw ( KiB/s): min= 7892, max= 8062, per=100.00%, avg=7977.00, stdev=120.21, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.10%, ctx=37, 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=3890KiB/s (3983kB/s), 972KiB/s-7178KiB/s (996kB/s-7350kB/s), io=16.0MiB (16.8MB), run=1712-4212msec WRITE: bw=7780KiB/s (7966kB/s), 1945KiB/s-4708KiB/s (1992kB/s-4821kB/s), io=32.0MiB (33.6MB), run=2610-4212msec rand-rw: (groupid=0, jobs=1): err= 0: pid=144903: Sat Aug 15 17:52:54 2026 read: IOPS=1, BW=4981KiB/s (5100kB/s)(12.0MiB/2467msec) clat (msec): min=741, max=880, avg=789.87, stdev=78.98 lat (msec): min=741, max=880, avg=789.87, stdev=78.98 clat percentiles (msec): | 1.00th=[ 743], 5.00th=[ 743], 10.00th=[ 743], 20.00th=[ 743], | 30.00th=[ 743], 40.00th=[ 751], 50.00th=[ 751], 60.00th=[ 751], | 70.00th=[ 885], 80.00th=[ 885], 90.00th=[ 885], 95.00th=[ 885], | 99.00th=[ 885], 99.50th=[ 885], 99.90th=[ 885], 99.95th=[ 885], | 99.99th=[ 885] bw ( KiB/s): min= 7937, max= 8031, per=100.00%, avg=7984.00, stdev=66.47, 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=0.36%, sys=13.46%, ctx=211, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144904: Sat Aug 15 17:52:54 2026 read: IOPS=0, BW=1265KiB/s (1295kB/s)(4096KiB/3238msec) clat (nsec): min=560038k, max=560038k, avg=560037655.00, stdev= 0.00 lat (nsec): min=560040k, max=560040k, avg=560040375.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 558], 5.00th=[ 558], 10.00th=[ 558], 20.00th=[ 558], | 30.00th=[ 558], 40.00th=[ 558], 50.00th=[ 558], 60.00th=[ 558], | 70.00th=[ 558], 80.00th=[ 558], 90.00th=[ 558], 95.00th=[ 558], | 99.00th=[ 558], 99.50th=[ 558], 99.90th=[ 558], 99.95th=[ 558], | 99.99th=[ 558] bw ( KiB/s): min= 8192, max= 8192, per=100.00%, avg=8192.00, stdev= 0.00, samples=1 iops : min= 2, max= 2, avg= 2.00, stdev= 0.00, samples=1 write: IOPS=0, BW=2530KiB/s (2591kB/s)(8192KiB/3238msec); 0 zone resets clat (msec): min=850, max=1621, avg=1236.03, stdev=545.34 lat (msec): min=850, max=1621, avg=1236.43, stdev=545.27 clat percentiles (msec): | 1.00th=[ 852], 5.00th=[ 852], 10.00th=[ 852], 20.00th=[ 852], | 30.00th=[ 852], 40.00th=[ 852], 50.00th=[ 852], 60.00th=[ 1620], | 70.00th=[ 1620], 80.00th=[ 1620], 90.00th=[ 1620], 95.00th=[ 1620], | 99.00th=[ 1620], 99.50th=[ 1620], 99.90th=[ 1620], 99.95th=[ 1620], | 99.99th=[ 1620] bw ( KiB/s): min= 8031, max= 8031, per=91.59%, avg=8031.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=2.75%, ctx=49, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144905: Sat Aug 15 17:52:54 2026 write: IOPS=0, BW=3288KiB/s (3367kB/s)(12.0MiB/3737msec); 0 zone resets clat (msec): min=305, max=1696, avg=1215.06, stdev=788.41 lat (msec): min=306, max=1700, avg=1216.84, stdev=789.11 clat percentiles (msec): | 1.00th=[ 305], 5.00th=[ 305], 10.00th=[ 305], 20.00th=[ 305], | 30.00th=[ 305], 40.00th=[ 1636], 50.00th=[ 1636], 60.00th=[ 1636], | 70.00th=[ 1703], 80.00th=[ 1703], 90.00th=[ 1703], 95.00th=[ 1703], | 99.00th=[ 1703], 99.50th=[ 1703], 99.90th=[ 1703], 99.95th=[ 1703], | 99.99th=[ 1703] bw ( KiB/s): min= 8159, max= 8192, per=93.24%, avg=8175.50, stdev=23.33, samples=2 iops : min= 1, max= 2, avg= 1.50, stdev= 0.71, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=1.82%, ctx=31, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=144906: Sat Aug 15 17:52:54 2026 write: IOPS=1, BW=4699KiB/s (4812kB/s)(12.0MiB/2615msec); 0 zone resets clat (msec): min=366, max=1518, avg=834.16, stdev=606.25 lat (msec): min=366, max=1519, avg=834.57, stdev=606.34 clat percentiles (msec): | 1.00th=[ 368], 5.00th=[ 368], 10.00th=[ 368], 20.00th=[ 368], | 30.00th=[ 368], 40.00th=[ 617], 50.00th=[ 617], 60.00th=[ 617], | 70.00th=[ 1519], 80.00th=[ 1519], 90.00th=[ 1519], 95.00th=[ 1519], | 99.00th=[ 1519], 99.50th=[ 1519], 99.90th=[ 1519], 99.95th=[ 1519], | 99.99th=[ 1519] bw ( KiB/s): min= 8192, max= 8192, per=93.43%, 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%, 750=33.33%, 2000=33.33% cpu : usr=0.00%, sys=4.28%, ctx=57, 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=5060KiB/s (5181kB/s), 1265KiB/s-4981KiB/s (1295kB/s-5100kB/s), io=16.0MiB (16.8MB), run=2467-3238msec WRITE: bw=8769KiB/s (8979kB/s), 2530KiB/s-4699KiB/s (2591kB/s-4812kB/s), io=32.0MiB (33.6MB), run=2615-3737msec