== sanity test 398b: DIO and buffer IO race ============== 18:03:54 (1779314634) /usr/bin/fio 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 7.33819 s, 6.9 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=179712: Wed May 20 18:06:27 2026 read: IOPS=11, BW=46.3KiB/s (47.4kB/s)(5992KiB/129401msec) clat (usec): min=30, max=674117, avg=42724.24, stdev=37597.30 lat (usec): min=30, max=674118, avg=42725.72, stdev=37597.67 clat percentiles (usec): | 1.00th=[ 46], 5.00th=[ 56], 10.00th=[ 1483], 20.00th=[ 19268], | 30.00th=[ 24773], 40.00th=[ 29492], 50.00th=[ 35390], 60.00th=[ 42730], | 70.00th=[ 51643], 80.00th=[ 62653], 90.00th=[ 79168], 95.00th=[ 96994], | 99.00th=[162530], 99.50th=[240124], 99.90th=[358613], 99.95th=[675283], | 99.99th=[675283] bw ( KiB/s): min= 7, max= 111, per=25.10%, avg=46.19, stdev=20.90, samples=252 iops : min= 1, max= 27, avg=10.91, stdev= 5.27, samples=252 write: IOPS=12, BW=48.7KiB/s (49.8kB/s)(6296KiB/129401msec); 0 zone resets clat (usec): min=1064, max=621929, avg=41273.55, stdev=45412.92 lat (usec): min=1064, max=621930, avg=41275.51, stdev=45413.22 clat percentiles (usec): | 1.00th=[ 1172], 5.00th=[ 1254], 10.00th=[ 1450], 20.00th=[ 4146], | 30.00th=[ 9110], 40.00th=[ 18220], 50.00th=[ 28705], 60.00th=[ 41157], | 70.00th=[ 53740], 80.00th=[ 70779], 90.00th=[ 98042], 95.00th=[122160], | 99.00th=[181404], 99.50th=[223347], 99.90th=[429917], 99.95th=[624952], | 99.99th=[624952] bw ( KiB/s): min= 7, max= 166, per=25.13%, avg=48.24, stdev=22.54, samples=254 iops : min= 1, max= 41, avg=11.42, stdev= 5.69, samples=254 lat (usec) : 50=0.88%, 100=3.65%, 250=0.20%, 500=0.03%, 750=0.03% lat (usec) : 1000=0.03% lat (msec) : 2=7.00%, 4=3.26%, 10=6.32%, 20=10.19%, 50=36.33% lat (msec) : 100=25.26%, 250=6.58%, 500=0.20%, 750=0.07% cpu : usr=0.07%, sys=5.33%, ctx=6431, 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=179714: Wed May 20 18:06:27 2026 read: IOPS=11, BW=46.2KiB/s (47.3kB/s)(5940KiB/128677msec) clat (usec): min=28, max=583843, avg=41436.80, stdev=34485.48 lat (usec): min=28, max=583845, avg=41442.57, stdev=34482.01 clat percentiles (usec): | 1.00th=[ 49], 5.00th=[ 56], 10.00th=[ 80], 20.00th=[ 19006], | 30.00th=[ 24249], 40.00th=[ 29230], 50.00th=[ 35390], 60.00th=[ 42730], | 70.00th=[ 50594], 80.00th=[ 61080], 90.00th=[ 78119], 95.00th=[ 96994], | 99.00th=[152044], 99.50th=[179307], 99.90th=[291505], 99.95th=[583009], | 99.99th=[583009] bw ( KiB/s): min= 7, max= 120, per=25.16%, avg=46.29, stdev=20.14, samples=251 iops : min= 1, max= 30, avg=10.93, stdev= 5.07, samples=251 write: IOPS=12, BW=49.3KiB/s (50.5kB/s)(6348KiB/128677msec); 0 zone resets clat (usec): min=1032, max=387732, avg=41956.48, stdev=45081.44 lat (usec): min=1033, max=387733, avg=41962.65, stdev=45083.74 clat percentiles (usec): | 1.00th=[ 1156], 5.00th=[ 1254], 10.00th=[ 1483], 20.00th=[ 4424], | 30.00th=[ 8848], 40.00th=[ 18744], 50.00th=[ 28967], 60.00th=[ 41681], | 70.00th=[ 54264], 80.00th=[ 71828], 90.00th=[ 99091], 95.00th=[127402], | 99.00th=[198181], 99.50th=[248513], 99.90th=[299893], 99.95th=[387974], | 99.99th=[387974] bw ( KiB/s): min= 7, max= 126, per=25.76%, avg=49.46, stdev=21.13, samples=251 iops : min= 1, max= 31, avg=11.73, stdev= 5.31, samples=251 lat (usec) : 50=0.81%, 100=4.39%, 250=0.20%, 500=0.03%, 750=0.03% lat (msec) : 2=6.35%, 4=3.35%, 10=7.06%, 20=9.54%, 50=35.87% lat (msec) : 100=25.29%, 250=6.80%, 500=0.23%, 750=0.03% cpu : usr=0.07%, sys=5.11%, ctx=6339, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179716: Wed May 20 18:06:27 2026 read: IOPS=11, BW=46.3KiB/s (47.4kB/s)(6028KiB/130307msec) clat (usec): min=26, max=471309, avg=41105.17, stdev=33538.35 lat (usec): min=26, max=471309, avg=41108.02, stdev=33537.59 clat percentiles (usec): | 1.00th=[ 47], 5.00th=[ 57], 10.00th=[ 7963], 20.00th=[ 18482], | 30.00th=[ 23987], 40.00th=[ 28705], 50.00th=[ 33817], 60.00th=[ 41157], | 70.00th=[ 50070], 80.00th=[ 61080], 90.00th=[ 77071], 95.00th=[ 93848], | 99.00th=[149947], 99.50th=[198181], 99.90th=[304088], 99.95th=[471860], | 99.99th=[471860] bw ( KiB/s): min= 7, max= 159, per=25.21%, avg=46.39, stdev=21.48, samples=253 iops : min= 1, max= 39, avg=10.96, stdev= 5.42, samples=253 write: IOPS=12, BW=48.0KiB/s (49.2kB/s)(6260KiB/130307msec); 0 zone resets clat (usec): min=1101, max=786739, avg=43405.62, stdev=51687.33 lat (usec): min=1102, max=786740, avg=43407.33, stdev=51687.49 clat percentiles (usec): | 1.00th=[ 1188], 5.00th=[ 1319], 10.00th=[ 1729], 20.00th=[ 4228], | 30.00th=[ 9503], 40.00th=[ 20055], 50.00th=[ 31589], 60.00th=[ 42206], | 70.00th=[ 55837], 80.00th=[ 73925], 90.00th=[ 96994], 95.00th=[123208], | 99.00th=[200279], 99.50th=[283116], 99.90th=[784335], 99.95th=[784335], | 99.99th=[784335] bw ( KiB/s): min= 7, max= 159, per=24.86%, avg=47.74, stdev=21.83, samples=255 iops : min= 1, max= 39, avg=11.30, stdev= 5.49, samples=255 lat (usec) : 50=0.91%, 100=3.39%, 250=0.23%, 500=0.03%, 750=0.03% lat (usec) : 1000=0.07% lat (msec) : 2=5.79%, 4=4.04%, 10=6.58%, 20=9.96%, 50=37.01% lat (msec) : 100=25.23%, 250=6.35%, 500=0.33%, 1000=0.07% cpu : usr=0.06%, sys=4.99%, ctx=6361, majf=0, minf=16 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1507,1565,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179717: Wed May 20 18:06:27 2026 read: IOPS=11, BW=47.1KiB/s (48.2kB/s)(6052KiB/128615msec) clat (usec): min=31, max=279447, avg=40502.67, stdev=30521.63 lat (usec): min=31, max=279448, avg=40504.00, stdev=30521.71 clat percentiles (usec): | 1.00th=[ 48], 5.00th=[ 56], 10.00th=[ 153], 20.00th=[ 19268], | 30.00th=[ 24249], 40.00th=[ 29754], 50.00th=[ 34866], 60.00th=[ 41157], | 70.00th=[ 48497], 80.00th=[ 60556], 90.00th=[ 79168], 95.00th=[ 93848], | 99.00th=[143655], 99.50th=[160433], 99.90th=[270533], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 7, max= 111, per=25.50%, avg=46.92, stdev=19.70, samples=252 iops : min= 1, max= 27, avg=11.10, stdev= 4.98, samples=252 write: IOPS=12, BW=48.5KiB/s (49.6kB/s)(6236KiB/128615msec); 0 zone resets clat (usec): min=1088, max=612470, avg=42927.31, stdev=46573.32 lat (usec): min=1089, max=612473, avg=42931.58, stdev=46572.00 clat percentiles (usec): | 1.00th=[ 1172], 5.00th=[ 1287], 10.00th=[ 1549], 20.00th=[ 4113], | 30.00th=[ 8586], 40.00th=[ 17957], 50.00th=[ 29492], 60.00th=[ 42730], | 70.00th=[ 58459], 80.00th=[ 76022], 90.00th=[102237], 95.00th=[125305], | 99.00th=[187696], 99.50th=[223347], 99.90th=[392168], 99.95th=[616563], | 99.99th=[616563] bw ( KiB/s): min= 7, max= 127, per=25.12%, avg=48.22, stdev=21.95, samples=253 iops : min= 1, max= 31, avg=11.41, stdev= 5.53, samples=253 lat (usec) : 50=0.68%, 100=4.13%, 250=0.33%, 500=0.07%, 750=0.13% lat (usec) : 1000=0.03% lat (msec) : 2=6.09%, 4=3.84%, 10=7.00%, 20=9.15%, 50=36.69% lat (msec) : 100=24.58%, 250=7.00%, 500=0.26%, 750=0.03% cpu : usr=0.07%, sys=5.11%, ctx=6315, majf=0, minf=17 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1513,1559,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=184KiB/s (189kB/s), 46.2KiB/s-47.1KiB/s (47.3kB/s-48.2kB/s), io=23.4MiB (24.6MB), run=128615-130307msec WRITE: bw=193KiB/s (198kB/s), 48.0KiB/s-49.3KiB/s (49.2kB/s-50.5kB/s), io=24.6MiB (25.7MB), run=128615-130307msec fio: pid=179713, err=5/file:backend.c:481, func=full resid, error=Input/output error rand-rw: (groupid=0, jobs=1): err= 0: pid=179710: Wed May 20 18:08:44 2026 read: IOPS=5, BW=22.4KiB/s (22.0kB/s)(5992KiB/267200msec) clat (msec): min=5, max=710, avg=33.95, stdev=42.90 lat (msec): min=5, max=710, avg=33.96, stdev=42.90 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 10], 20.00th=[ 13], | 30.00th=[ 15], 40.00th=[ 18], 50.00th=[ 21], 60.00th=[ 25], | 70.00th=[ 31], 80.00th=[ 45], 90.00th=[ 74], 95.00th=[ 105], | 99.00th=[ 190], 99.50th=[ 275], 99.90th=[ 506], 99.95th=[ 709], | 99.99th=[ 709] bw ( KiB/s): min= 7, max= 103, per=30.32%, avg=25.47, stdev=17.49, samples=455 iops : min= 1, max= 25, avg= 5.74, stdev= 4.41, samples=455 write: IOPS=5, BW=23.6KiB/s (24.1kB/s)(6296KiB/267200msec); 0 zone resets clat (msec): min=34, max=811, avg=137.18, stdev=72.09 lat (msec): min=34, max=811, avg=137.19, stdev=72.09 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 61], 10.00th=[ 71], 20.00th=[ 83], | 30.00th=[ 95], 40.00th=[ 106], 50.00th=[ 118], 60.00th=[ 136], | 70.00th=[ 157], 80.00th=[ 182], 90.00th=[ 226], 95.00th=[ 271], | 99.00th=[ 388], 99.50th=[ 435], 99.90th=[ 651], 99.95th=[ 810], | 99.99th=[ 810] bw ( KiB/s): min= 7, max= 55, per=26.63%, avg=23.44, stdev=10.99, samples=518 iops : min= 1, max= 13, avg= 5.22, stdev= 2.84, samples=518 lat (msec) : 10=4.92%, 20=18.23%, 50=18.00%, 100=22.95%, 250=31.90% lat (msec) : 500=3.84%, 750=0.13%, 1000=0.03% cpu : usr=0.03%, sys=1.32%, ctx=5432, majf=0, minf=14 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1498,1574,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179711: Wed May 20 18:08:44 2026 read: IOPS=5, BW=22.2KiB/s (22.8kB/s)(5940KiB/266965msec) clat (msec): min=4, max=617, avg=33.26, stdev=39.89 lat (msec): min=4, max=617, avg=33.26, stdev=39.89 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 15], 40.00th=[ 18], 50.00th=[ 21], 60.00th=[ 25], | 70.00th=[ 31], 80.00th=[ 44], 90.00th=[ 73], 95.00th=[ 100], | 99.00th=[ 194], 99.50th=[ 239], 99.90th=[ 506], 99.95th=[ 617], | 99.99th=[ 617] bw ( KiB/s): min= 7, max= 95, per=30.34%, avg=25.48, stdev=17.16, samples=450 iops : min= 1, max= 23, avg= 5.75, stdev= 4.35, samples=450 write: IOPS=5, BW=23.8KiB/s (24.3kB/s)(6348KiB/266965msec); 0 zone resets clat (msec): min=35, max=853, avg=136.81, stdev=72.98 lat (msec): min=35, max=853, avg=136.81, stdev=72.98 clat percentiles (msec): | 1.00th=[ 48], 5.00th=[ 62], 10.00th=[ 70], 20.00th=[ 82], | 30.00th=[ 93], 40.00th=[ 104], 50.00th=[ 117], 60.00th=[ 132], | 70.00th=[ 153], 80.00th=[ 182], 90.00th=[ 232], 95.00th=[ 288], | 99.00th=[ 388], 99.50th=[ 435], 99.90th=[ 485], 99.95th=[ 852], | 99.99th=[ 852] bw ( KiB/s): min= 7, max= 55, per=27.02%, avg=23.78, stdev=11.12, samples=514 iops : min= 1, max= 13, avg= 5.31, stdev= 2.86, samples=514 lat (msec) : 10=4.72%, 20=18.42%, 50=17.90%, 100=24.02%, 250=30.70% lat (msec) : 500=4.13%, 750=0.07%, 1000=0.03% cpu : usr=0.03%, sys=1.25%, ctx=5350, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1485,1587,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 5 (file:backend.c:481, func=full resid, error=Input/output error): pid=179713: Wed May 20 18:08:44 2026 read: IOPS=5, BW=20.6KiB/s (21.1kB/s)(4592KiB/222451msec) clat (msec): min=6, max=511, avg=40.22, stdev=42.30 lat (msec): min=6, max=511, avg=40.22, stdev=42.30 clat percentiles (msec): | 1.00th=[ 7], 5.00th=[ 9], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 31], | 70.00th=[ 43], 80.00th=[ 61], 90.00th=[ 91], 95.00th=[ 116], | 99.00th=[ 192], 99.50th=[ 288], 99.90th=[ 414], 99.95th=[ 510], | 99.99th=[ 510] bw ( KiB/s): min= 7, max= 111, per=27.77%, avg=23.33, stdev=16.85, samples=379 iops : min= 1, max= 27, avg= 5.19, stdev= 4.27, samples=379 write: IOPS=5, BW=21.7KiB/s (22.2kB/s)(4820KiB/222451msec); 0 zone resets clat (msec): min=40, max=817, avg=146.01, stdev=75.56 lat (msec): min=40, max=817, avg=146.01, stdev=75.56 clat percentiles (msec): | 1.00th=[ 51], 5.00th=[ 67], 10.00th=[ 75], 20.00th=[ 88], | 30.00th=[ 101], 40.00th=[ 113], 50.00th=[ 128], 60.00th=[ 142], | 70.00th=[ 167], 80.00th=[ 197], 90.00th=[ 245], 95.00th=[ 284], | 99.00th=[ 384], 99.50th=[ 414], 99.90th=[ 751], 99.95th=[ 818], | 99.99th=[ 818] bw ( KiB/s): min= 7, max= 48, per=24.25%, avg=21.34, stdev=10.83, samples=433 iops : min= 1, max= 12, avg= 4.68, stdev= 2.79, samples=433 lat (msec) : 10=3.57%, 20=15.93%, 50=17.25%, 100=23.83%, 250=34.49% lat (msec) : 500=4.72%, 750=0.08%, 1000=0.08% cpu : usr=0.03%, sys=1.24%, ctx=3931, 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=1149,1205,0,0 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=179715: Wed May 20 18:08:44 2026 read: IOPS=5, BW=22.9KiB/s (23.4kB/s)(6052KiB/264366msec) clat (msec): min=5, max=494, avg=34.17, stdev=39.47 lat (msec): min=5, max=494, avg=34.17, stdev=39.47 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 9], 10.00th=[ 11], 20.00th=[ 13], | 30.00th=[ 16], 40.00th=[ 18], 50.00th=[ 22], 60.00th=[ 25], | 70.00th=[ 32], 80.00th=[ 47], 90.00th=[ 75], 95.00th=[ 101], | 99.00th=[ 190], 99.50th=[ 255], 99.90th=[ 460], 99.95th=[ 493], | 99.99th=[ 493] bw ( KiB/s): min= 7, max= 88, per=30.67%, avg=25.76, stdev=17.47, samples=454 iops : min= 1, max= 22, avg= 5.80, stdev= 4.41, samples=454 write: IOPS=5, BW=23.6KiB/s (24.2kB/s)(6236KiB/264366msec); 0 zone resets clat (msec): min=34, max=728, avg=136.13, stdev=71.32 lat (msec): min=34, max=728, avg=136.14, stdev=71.32 clat percentiles (msec): | 1.00th=[ 50], 5.00th=[ 62], 10.00th=[ 71], 20.00th=[ 84], | 30.00th=[ 95], 40.00th=[ 105], 50.00th=[ 116], 60.00th=[ 134], | 70.00th=[ 153], 80.00th=[ 180], 90.00th=[ 228], 95.00th=[ 271], | 99.00th=[ 384], 99.50th=[ 464], 99.90th=[ 642], 99.95th=[ 726], | 99.99th=[ 726] bw ( KiB/s): min= 7, max= 55, per=26.42%, avg=23.25, stdev=11.16, samples=516 iops : min= 1, max= 13, avg= 5.17, stdev= 2.88, samples=516 lat (msec) : 10=4.52%, 20=18.16%, 50=18.03%, 100=24.48%, 250=30.99% lat (msec) : 500=3.61%, 750=0.20% cpu : usr=0.04%, sys=1.26%, ctx=5395, 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=84.5KiB/s (86.5kB/s), 20.6KiB/s-22.9KiB/s (21.1kB/s-23.4kB/s), io=22.0MiB (23.1MB), run=222451-267200msec WRITE: bw=88.7KiB/s (90.8kB/s), 21.7KiB/s-23.8KiB/s (22.2kB/s-24.3kB/s), io=23.1MiB (24.3MB), run=222451-267200msec 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=179773: Wed May 20 18:09:22 2026 read: IOPS=13, BW=221KiB/s (227kB/s)(5920KiB/26753msec) clat (usec): min=34, max=244519, avg=36794.53, stdev=34666.32 lat (usec): min=35, max=244519, avg=36795.64, stdev=34666.26 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 53], 10.00th=[ 59], 20.00th=[ 78], | 30.00th=[ 18482], 40.00th=[ 26870], 50.00th=[ 33162], 60.00th=[ 40109], | 70.00th=[ 46400], 80.00th=[ 56886], 90.00th=[ 72877], 95.00th=[ 89654], | 99.00th=[168821], 99.50th=[202376], 99.90th=[244319], 99.95th=[244319], | 99.99th=[244319] bw ( KiB/s): min= 94, max= 510, per=25.08%, avg=221.69, stdev=80.56, samples=52 iops : min= 5, max= 31, avg=13.12, stdev= 5.09, samples=52 write: IOPS=14, BW=238KiB/s (244kB/s)(6368KiB/26753msec); 0 zone resets clat (usec): min=1437, max=253533, avg=32493.94, stdev=35753.52 lat (usec): min=1440, max=253535, avg=32503.06, stdev=35752.29 clat percentiles (usec): | 1.00th=[ 1483], 5.00th=[ 1844], 10.00th=[ 2343], 20.00th=[ 4080], | 30.00th=[ 7504], 40.00th=[ 11863], 50.00th=[ 19530], 60.00th=[ 29754], | 70.00th=[ 39584], 80.00th=[ 54264], 90.00th=[ 83362], 95.00th=[107480], | 99.00th=[156238], 99.50th=[168821], 99.90th=[252707], 99.95th=[252707], | 99.99th=[252707] bw ( KiB/s): min= 30, max= 448, per=25.78%, avg=239.71, stdev=103.12, samples=52 iops : min= 1, max= 28, avg=14.23, stdev= 6.48, samples=52 lat (usec) : 50=1.69%, 100=8.59%, 250=1.04%, 750=0.26%, 1000=0.13% lat (msec) : 2=4.43%, 4=6.12%, 10=8.33%, 20=10.29%, 50=34.24% lat (msec) : 100=19.01%, 250=5.73%, 500=0.13% cpu : usr=0.09%, sys=6.17%, ctx=1435, 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=179774: Wed May 20 18:09:22 2026 read: IOPS=13, BW=212KiB/s (217kB/s)(5744KiB/27071msec) clat (usec): min=38, max=232226, avg=36739.33, stdev=32027.20 lat (usec): min=38, max=232227, avg=36744.10, stdev=32023.01 clat percentiles (usec): | 1.00th=[ 41], 5.00th=[ 56], 10.00th=[ 62], 20.00th=[ 103], | 30.00th=[ 21103], 40.00th=[ 27132], 50.00th=[ 32375], 60.00th=[ 39584], | 70.00th=[ 47449], 80.00th=[ 60031], 90.00th=[ 78119], 95.00th=[ 90702], | 99.00th=[143655], 99.50th=[160433], 99.90th=[231736], 99.95th=[231736], | 99.99th=[231736] bw ( KiB/s): min= 59, max= 447, per=23.93%, avg=211.53, stdev=84.19, samples=53 iops : min= 3, max= 27, avg=12.49, stdev= 5.30, samples=53 write: IOPS=15, BW=242KiB/s (248kB/s)(6544KiB/27071msec); 0 zone resets clat (usec): min=1633, max=275401, avg=33338.87, stdev=38632.59 lat (usec): min=1634, max=275403, avg=33344.41, stdev=38630.93 clat percentiles (usec): | 1.00th=[ 1680], 5.00th=[ 1844], 10.00th=[ 2474], 20.00th=[ 5211], | 30.00th=[ 8160], 40.00th=[ 12780], 50.00th=[ 19006], 60.00th=[ 27132], | 70.00th=[ 40633], 80.00th=[ 56886], 90.00th=[ 80217], 95.00th=[108528], | 99.00th=[175113], 99.50th=[217056], 99.90th=[274727], 99.95th=[274727], | 99.99th=[274727] bw ( KiB/s): min= 31, max= 563, per=25.88%, avg=240.70, stdev=108.82, samples=53 iops : min= 1, max= 35, avg=14.32, stdev= 6.84, samples=53 lat (usec) : 50=1.04%, 100=8.20%, 250=0.65%, 500=0.39%, 750=0.13% lat (msec) : 2=3.91%, 4=5.47%, 10=9.24%, 20=11.46%, 50=34.24% lat (msec) : 100=20.57%, 250=4.56%, 500=0.13% cpu : usr=0.11%, sys=6.67%, ctx=1476, 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=179775: Wed May 20 18:09:22 2026 read: IOPS=15, BW=245KiB/s (251kB/s)(6256KiB/25502msec) clat (usec): min=35, max=242354, avg=34256.84, stdev=29212.08 lat (usec): min=35, max=242355, avg=34257.92, stdev=29212.19 clat percentiles (usec): | 1.00th=[ 39], 5.00th=[ 53], 10.00th=[ 59], 20.00th=[ 87], | 30.00th=[ 20317], 40.00th=[ 27132], 50.00th=[ 33424], 60.00th=[ 39060], | 70.00th=[ 45351], 80.00th=[ 52691], 90.00th=[ 67634], 95.00th=[ 76022], | 99.00th=[132645], 99.50th=[139461], 99.90th=[242222], 99.95th=[242222], | 99.99th=[242222] bw ( KiB/s): min= 62, max= 446, per=28.54%, avg=252.29, stdev=86.30, samples=49 iops : min= 3, max= 27, avg=15.04, stdev= 5.45, samples=49 write: IOPS=14, BW=237KiB/s (242kB/s)(6032KiB/25502msec); 0 zone resets clat (usec): min=1606, max=280912, avg=31185.58, stdev=37078.02 lat (usec): min=1608, max=280914, avg=31194.30, stdev=37074.74 clat percentiles (usec): | 1.00th=[ 1680], 5.00th=[ 1827], 10.00th=[ 2671], 20.00th=[ 4490], | 30.00th=[ 7308], 40.00th=[ 10028], 50.00th=[ 16319], 60.00th=[ 24773], | 70.00th=[ 38011], 80.00th=[ 55837], 90.00th=[ 77071], 95.00th=[102237], | 99.00th=[189793], 99.50th=[208667], 99.90th=[278922], 99.95th=[278922], | 99.99th=[278922] bw ( KiB/s): min= 59, max= 574, per=25.55%, avg=237.58, stdev=117.07, samples=50 iops : min= 3, max= 35, avg=14.12, stdev= 7.37, samples=50 lat (usec) : 50=1.56%, 100=8.85%, 250=0.91%, 500=0.26%, 750=0.13% lat (msec) : 2=3.65%, 4=5.86%, 10=10.55%, 20=10.42%, 50=33.98% lat (msec) : 100=19.79%, 250=3.91%, 500=0.13% cpu : usr=0.10%, sys=6.23%, ctx=1421, 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=179776: Wed May 20 18:09:22 2026 read: IOPS=14, BW=239KiB/s (245kB/s)(6032KiB/25196msec) clat (usec): min=29, max=146245, avg=34659.04, stdev=28137.23 lat (usec): min=30, max=146247, avg=34660.59, stdev=28137.11 clat percentiles (usec): | 1.00th=[ 38], 5.00th=[ 52], 10.00th=[ 58], 20.00th=[ 79], | 30.00th=[ 20317], 40.00th=[ 26346], 50.00th=[ 32113], 60.00th=[ 36963], | 70.00th=[ 45876], 80.00th=[ 55313], 90.00th=[ 72877], 95.00th=[ 86508], | 99.00th=[115868], 99.50th=[127402], 99.90th=[145753], 99.95th=[145753], | 99.99th=[145753] bw ( KiB/s): min= 62, max= 413, per=27.12%, avg=239.71, stdev=88.44, samples=49 iops : min= 3, max= 25, avg=14.27, stdev= 5.54, samples=49 write: IOPS=15, BW=248KiB/s (254kB/s)(6256KiB/25196msec); 0 zone resets clat (usec): min=1432, max=271969, avg=30855.38, stdev=35383.44 lat (usec): min=1434, max=271972, avg=30857.22, stdev=35383.47 clat percentiles (usec): | 1.00th=[ 1516], 5.00th=[ 1778], 10.00th=[ 1975], 20.00th=[ 4948], | 30.00th=[ 7570], 40.00th=[ 11207], 50.00th=[ 17171], 60.00th=[ 26084], | 70.00th=[ 37487], 80.00th=[ 53740], 90.00th=[ 78119], 95.00th=[102237], | 99.00th=[173016], 99.50th=[210764], 99.90th=[270533], 99.95th=[270533], | 99.99th=[270533] bw ( KiB/s): min= 63, max= 508, per=26.95%, avg=250.59, stdev=94.89, samples=49 iops : min= 3, max= 31, avg=14.96, stdev= 5.95, samples=49 lat (usec) : 50=1.69%, 100=9.11%, 250=0.26%, 500=0.26% lat (msec) : 2=5.34%, 4=3.52%, 10=9.77%, 20=11.20%, 50=34.64% lat (msec) : 100=20.18%, 250=3.91%, 500=0.13% cpu : usr=0.10%, sys=6.69%, ctx=1376, 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=885KiB/s (906kB/s), 212KiB/s-245KiB/s (217kB/s-251kB/s), io=23.4MiB (24.5MB), run=25196-27071msec WRITE: bw=931KiB/s (953kB/s), 237KiB/s-248KiB/s (242kB/s-254kB/s), io=24.6MiB (25.8MB), run=25196-27071msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179777: Wed May 20 18:10:02 2026 read: IOPS=5, BW=88.9KiB/s (90.0kB/s)(5920KiB/66624msec) clat (msec): min=6, max=425, avg=35.32, stdev=38.99 lat (msec): min=6, max=425, avg=35.32, stdev=38.99 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 12], 20.00th=[ 16], | 30.00th=[ 17], 40.00th=[ 20], 50.00th=[ 24], 60.00th=[ 28], | 70.00th=[ 34], 80.00th=[ 42], 90.00th=[ 69], 95.00th=[ 107], | 99.00th=[ 178], 99.50th=[ 296], 99.90th=[ 426], 99.95th=[ 426], | 99.99th=[ 426] bw ( KiB/s): min= 31, max= 319, per=28.32%, avg=100.83, stdev=68.01, samples=115 iops : min= 1, max= 19, avg= 5.53, stdev= 4.33, samples=115 write: IOPS=5, BW=95.6KiB/s (97.9kB/s)(6368KiB/66624msec); 0 zone resets clat (msec): min=52, max=507, avg=133.80, stdev=58.94 lat (msec): min=52, max=507, avg=133.80, stdev=58.94 clat percentiles (msec): | 1.00th=[ 56], 5.00th=[ 66], 10.00th=[ 74], 20.00th=[ 87], | 30.00th=[ 100], 40.00th=[ 112], 50.00th=[ 121], 60.00th=[ 132], | 70.00th=[ 148], 80.00th=[ 171], 90.00th=[ 218], 95.00th=[ 249], | 99.00th=[ 321], 99.50th=[ 376], 99.90th=[ 506], 99.95th=[ 506], | 99.99th=[ 506] bw ( KiB/s): min= 21, max= 160, per=25.87%, avg=96.76, stdev=39.55, samples=129 iops : min= 1, max= 10, avg= 5.26, stdev= 2.57, samples=129 lat (msec) : 10=2.21%, 20=17.32%, 50=20.18%, 100=21.48%, 250=36.07% lat (msec) : 500=2.60%, 750=0.13% cpu : usr=0.03%, sys=1.43%, ctx=1354, majf=0, minf=13 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=370,398,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179778: Wed May 20 18:10:02 2026 read: IOPS=5, BW=85.4KiB/s (87.5kB/s)(5744KiB/67259msec) clat (msec): min=6, max=220, avg=32.75, stdev=30.29 lat (msec): min=6, max=220, avg=32.75, stdev=30.29 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 10], 10.00th=[ 12], 20.00th=[ 14], | 30.00th=[ 17], 40.00th=[ 21], 50.00th=[ 23], 60.00th=[ 26], | 70.00th=[ 31], 80.00th=[ 43], 90.00th=[ 73], 95.00th=[ 96], | 99.00th=[ 157], 99.50th=[ 220], 99.90th=[ 222], 99.95th=[ 222], | 99.99th=[ 222] bw ( KiB/s): min= 21, max= 317, per=27.79%, avg=98.94, stdev=65.54, samples=113 iops : min= 1, max= 19, avg= 5.41, stdev= 4.12, samples=113 write: IOPS=6, BW=97.3KiB/s (99.6kB/s)(6544KiB/67259msec); 0 zone resets clat (msec): min=46, max=410, avg=134.88, stdev=62.88 lat (msec): min=46, max=410, avg=134.88, stdev=62.88 clat percentiles (msec): | 1.00th=[ 54], 5.00th=[ 66], 10.00th=[ 74], 20.00th=[ 86], | 30.00th=[ 96], 40.00th=[ 106], 50.00th=[ 115], 60.00th=[ 132], | 70.00th=[ 153], 80.00th=[ 176], 90.00th=[ 230], 95.00th=[ 266], | 99.00th=[ 338], 99.50th=[ 351], 99.90th=[ 409], 99.95th=[ 409], | 99.99th=[ 409] bw ( KiB/s): min= 30, max= 192, per=26.39%, avg=98.69, stdev=40.29, samples=129 iops : min= 1, max= 12, avg= 5.38, stdev= 2.62, samples=129 lat (msec) : 10=2.47%, 20=16.15%, 50=20.31%, 100=24.48%, 250=33.20% lat (msec) : 500=3.39% cpu : usr=0.03%, sys=1.36%, ctx=1326, majf=0, minf=10 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=359,409,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179779: Wed May 20 18:10:02 2026 read: IOPS=6, BW=97.0KiB/s (99.4kB/s)(6256KiB/64478msec) clat (msec): min=6, max=254, avg=34.29, stdev=30.61 lat (msec): min=6, max=254, avg=34.30, stdev=30.61 clat percentiles (msec): | 1.00th=[ 8], 5.00th=[ 12], 10.00th=[ 14], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 21], 50.00th=[ 25], 60.00th=[ 29], | 70.00th=[ 34], 80.00th=[ 45], 90.00th=[ 66], 95.00th=[ 100], | 99.00th=[ 155], 99.50th=[ 218], 99.90th=[ 255], 99.95th=[ 255], | 99.99th=[ 255] bw ( KiB/s): min= 31, max= 319, per=29.65%, avg=105.56, stdev=72.40, samples=117 iops : min= 1, max= 19, avg= 5.81, stdev= 4.61, samples=117 write: IOPS=5, BW=93.6KiB/s (95.8kB/s)(6032KiB/64478msec); 0 zone resets clat (msec): min=48, max=440, avg=135.12, stdev=62.73 lat (msec): min=48, max=440, avg=135.12, stdev=62.73 clat percentiles (msec): | 1.00th=[ 53], 5.00th=[ 64], 10.00th=[ 70], 20.00th=[ 83], | 30.00th=[ 96], 40.00th=[ 107], 50.00th=[ 124], 60.00th=[ 136], | 70.00th=[ 148], 80.00th=[ 176], 90.00th=[ 234], 95.00th=[ 257], | 99.00th=[ 338], 99.50th=[ 393], 99.90th=[ 443], 99.95th=[ 443], | 99.99th=[ 443] bw ( KiB/s): min= 30, max= 192, per=25.23%, avg=94.34, stdev=38.99, samples=125 iops : min= 1, max= 12, avg= 5.10, stdev= 2.52, samples=125 lat (msec) : 10=1.56%, 20=16.41%, 50=24.22%, 100=23.18%, 250=31.38% lat (msec) : 500=3.26% cpu : usr=0.04%, sys=1.48%, ctx=1423, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=391,377,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179780: Wed May 20 18:10:02 2026 read: IOPS=5, BW=92.2KiB/s (94.4kB/s)(6032KiB/65408msec) clat (msec): min=6, max=419, avg=35.42, stdev=38.00 lat (msec): min=6, max=419, avg=35.42, stdev=38.00 clat percentiles (msec): | 1.00th=[ 9], 5.00th=[ 11], 10.00th=[ 13], 20.00th=[ 16], | 30.00th=[ 19], 40.00th=[ 22], 50.00th=[ 25], 60.00th=[ 29], | 70.00th=[ 35], 80.00th=[ 45], 90.00th=[ 68], 95.00th=[ 92], | 99.00th=[ 215], 99.50th=[ 296], 99.90th=[ 418], 99.95th=[ 418], | 99.99th=[ 418] bw ( KiB/s): min= 31, max= 349, per=28.53%, avg=101.57, stdev=66.67, samples=116 iops : min= 1, max= 21, avg= 5.55, stdev= 4.21, samples=116 write: IOPS=5, BW=95.6KiB/s (97.9kB/s)(6256KiB/65408msec); 0 zone resets clat (msec): min=52, max=520, avg=132.15, stdev=60.80 lat (msec): min=52, max=520, avg=132.16, stdev=60.79 clat percentiles (msec): | 1.00th=[ 57], 5.00th=[ 66], 10.00th=[ 75], 20.00th=[ 84], | 30.00th=[ 94], 40.00th=[ 105], 50.00th=[ 118], 60.00th=[ 130], | 70.00th=[ 148], 80.00th=[ 180], 90.00th=[ 209], 95.00th=[ 243], | 99.00th=[ 338], 99.50th=[ 376], 99.90th=[ 523], 99.95th=[ 523], | 99.99th=[ 523] bw ( KiB/s): min= 30, max= 191, per=25.73%, avg=96.23, stdev=38.94, samples=128 iops : min= 1, max= 11, avg= 5.21, stdev= 2.52, samples=128 lat (msec) : 10=1.95%, 20=15.49%, 50=23.31%, 100=24.48%, 250=32.16% lat (msec) : 500=2.47%, 750=0.13% cpu : usr=0.04%, sys=1.48%, ctx=1387, majf=0, minf=12 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=377,391,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=356KiB/s (365kB/s), 85.4KiB/s-97.0KiB/s (87.5kB/s-99.4kB/s), io=23.4MiB (24.5MB), run=64478-67259msec WRITE: bw=375KiB/s (384kB/s), 93.6KiB/s-97.3KiB/s (95.8kB/s-99.6kB/s), io=24.6MiB (25.8MB), run=64478-67259msec 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=179796: Wed May 20 18:10:16 2026 read: IOPS=1, BW=1523KiB/s (1559kB/s)(7168KiB/4708msec) clat (usec): min=947, max=3004.7k, avg=528662.52, stdev=1095429.68 lat (usec): min=948, max=3004.7k, avg=528663.83, stdev=1095429.64 clat percentiles (usec): | 1.00th=[ 947], 5.00th=[ 947], 10.00th=[ 947], | 20.00th=[ 3687], 30.00th=[ 130548], 40.00th=[ 130548], | 50.00th=[ 137364], 60.00th=[ 177210], 70.00th=[ 177210], | 80.00th=[ 246416], 90.00th=[3003122], 95.00th=[3003122], | 99.00th=[3003122], 99.50th=[3003122], 99.90th=[3003122], | 99.95th=[3003122], 99.99th=[3003122] bw ( KiB/s): min= 2027, max= 4000, per=68.52%, avg=2980.50, stdev=1100.10, samples=4 iops : min= 1, max= 3, avg= 2.00, stdev= 1.15, samples=4 write: IOPS=1, BW=1088KiB/s (1114kB/s)(5120KiB/4708msec); 0 zone resets clat (msec): min=144, max=292, avg=189.75, stdev=59.59 lat (msec): min=144, max=292, avg=189.81, stdev=59.59 clat percentiles (msec): | 1.00th=[ 144], 5.00th=[ 144], 10.00th=[ 144], 20.00th=[ 144], | 30.00th=[ 159], 40.00th=[ 159], 50.00th=[ 165], 60.00th=[ 165], | 70.00th=[ 190], 80.00th=[ 190], 90.00th=[ 292], 95.00th=[ 292], | 99.00th=[ 292], 99.50th=[ 292], 99.90th=[ 292], 99.95th=[ 292], | 99.99th=[ 292] bw ( KiB/s): min= 4000, max= 6083, per=82.78%, avg=5041.50, stdev=1472.90, samples=2 iops : min= 3, max= 5, avg= 4.00, stdev= 1.41, samples=2 lat (usec) : 1000=8.33% lat (msec) : 4=8.33%, 250=66.67%, 500=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.46%, ctx=390, 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=179797: Wed May 20 18:10:16 2026 read: IOPS=0, BW=451KiB/s (462kB/s)(2048KiB/4542msec) clat (msec): min=3, max=232, avg=117.59, stdev=161.88 lat (msec): min=3, max=232, avg=117.59, stdev=161.88 clat percentiles (msec): | 1.00th=[ 4], 5.00th=[ 4], 10.00th=[ 4], 20.00th=[ 4], | 30.00th=[ 4], 40.00th=[ 4], 50.00th=[ 4], 60.00th=[ 232], | 70.00th=[ 232], 80.00th=[ 232], 90.00th=[ 232], 95.00th=[ 232], | 99.00th=[ 232], 99.50th=[ 232], 99.90th=[ 232], 99.95th=[ 232], | 99.99th=[ 232] bw ( KiB/s): min= 1872, max= 2043, per=45.00%, avg=1957.50, stdev=120.92, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2255KiB/s (2309kB/s)(10.0MiB/4542msec); 0 zone resets clat (msec): min=90, max=1919, avg=423.52, stdev=543.42 lat (msec): min=91, max=1919, avg=424.07, stdev=543.28 clat percentiles (msec): | 1.00th=[ 91], 5.00th=[ 91], 10.00th=[ 91], 20.00th=[ 100], | 30.00th=[ 178], 40.00th=[ 234], 50.00th=[ 234], 60.00th=[ 234], | 70.00th=[ 279], 80.00th=[ 426], 90.00th=[ 542], 95.00th=[ 1921], | 99.00th=[ 1921], 99.50th=[ 1921], 99.90th=[ 1921], 99.95th=[ 1921], | 99.99th=[ 1921] bw ( KiB/s): min= 3849, max= 4087, per=66.10%, avg=4025.50, stdev=117.73, samples=4 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=4 lat (msec) : 4=8.33%, 100=16.67%, 250=41.67%, 500=16.67%, 750=8.33% lat (msec) : 2000=8.33% cpu : usr=0.00%, sys=9.51%, ctx=88, 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=179798: Wed May 20 18:10:16 2026 read: IOPS=1, BW=1484KiB/s (1519kB/s)(6144KiB/4141msec) clat (usec): min=522, max=208090, avg=102401.07, stdev=93659.63 lat (usec): min=524, max=208090, avg=102402.14, stdev=93659.24 clat percentiles (usec): | 1.00th=[ 523], 5.00th=[ 523], 10.00th=[ 523], 20.00th=[ 685], | 30.00th=[ 685], 40.00th=[ 58459], 50.00th=[ 58459], 60.00th=[170918], | 70.00th=[177210], 80.00th=[177210], 90.00th=[208667], 95.00th=[208667], | 99.00th=[208667], 99.50th=[208667], 99.90th=[208667], 99.95th=[208667], | 99.99th=[208667] bw ( KiB/s): min= 2000, max= 6131, per=77.96%, avg=3391.33, stdev=2372.72, samples=3 iops : min= 1, max= 5, avg= 2.33, stdev= 2.31, samples=3 write: IOPS=1, BW=1484KiB/s (1519kB/s)(6144KiB/4141msec); 0 zone resets clat (msec): min=147, max=2075, avg=579.50, stdev=755.56 lat (msec): min=147, max=2075, avg=580.07, stdev=755.30 clat percentiles (msec): | 1.00th=[ 148], 5.00th=[ 148], 10.00th=[ 148], 20.00th=[ 180], | 30.00th=[ 180], 40.00th=[ 199], 50.00th=[ 199], 60.00th=[ 234], | 70.00th=[ 642], 80.00th=[ 642], 90.00th=[ 2072], 95.00th=[ 2072], | 99.00th=[ 2072], 99.50th=[ 2072], 99.90th=[ 2072], 99.95th=[ 2072], | 99.99th=[ 2072] bw ( KiB/s): min= 2000, max= 4087, per=54.47%, avg=3317.00, stdev=1145.99, samples=3 iops : min= 1, max= 3, avg= 2.33, stdev= 1.15, samples=3 lat (usec) : 750=16.67% lat (msec) : 100=8.33%, 250=58.33%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=8.86%, ctx=195, 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=179799: Wed May 20 18:10:16 2026 read: IOPS=1, BW=1195KiB/s (1223kB/s)(5120KiB/4286msec) clat (usec): min=432, max=368655, avg=78194.37, stdev=162569.05 lat (usec): min=434, max=368656, avg=78195.31, stdev=162569.15 clat percentiles (usec): | 1.00th=[ 433], 5.00th=[ 433], 10.00th=[ 433], 20.00th=[ 433], | 30.00th=[ 1123], 40.00th=[ 1123], 50.00th=[ 1352], 60.00th=[ 1352], | 70.00th=[ 19530], 80.00th=[ 19530], 90.00th=[367002], 95.00th=[367002], | 99.00th=[367002], 99.50th=[367002], 99.90th=[367002], 99.95th=[367002], | 99.99th=[367002] bw ( KiB/s): min= 8175, max= 8175, per=100.00%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 7, max= 7, avg= 7.00, stdev= 0.00, samples=1 write: IOPS=1, BW=1672KiB/s (1713kB/s)(7168KiB/4286msec); 0 zone resets clat (msec): min=119, max=2312, avg=553.02, stdev=790.08 lat (msec): min=120, max=2312, avg=553.12, stdev=790.11 clat percentiles (msec): | 1.00th=[ 121], 5.00th=[ 121], 10.00th=[ 121], 20.00th=[ 138], | 30.00th=[ 201], 40.00th=[ 201], 50.00th=[ 266], 60.00th=[ 268], | 70.00th=[ 268], 80.00th=[ 567], 90.00th=[ 2299], 95.00th=[ 2299], | 99.00th=[ 2299], 99.50th=[ 2299], 99.90th=[ 2299], 99.95th=[ 2299], | 99.99th=[ 2299] bw ( KiB/s): min= 1914, max= 4087, per=40.74%, avg=2481.25, stdev=1071.19, samples=4 iops : min= 1, max= 3, avg= 1.50, stdev= 1.00, samples=4 lat (usec) : 500=8.33% lat (msec) : 2=16.67%, 20=8.33%, 250=25.00%, 500=25.00%, 750=8.33% lat (msec) : >=2000=8.33% cpu : usr=0.00%, sys=7.65%, ctx=105, 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=4350KiB/s (4454kB/s), 451KiB/s-1523KiB/s (462kB/s-1559kB/s), io=20.0MiB (20.0MB), run=4141-4708msec WRITE: bw=6090KiB/s (6236kB/s), 1088KiB/s-2255KiB/s (1114kB/s-2309kB/s), io=28.0MiB (29.4MB), run=4141-4708msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179801: Wed May 20 18:10:17 2026 read: IOPS=1, BW=1465KiB/s (1500kB/s)(7168KiB/4894msec) clat (msec): min=34, max=2185, avg=534.24, stdev=767.53 lat (msec): min=34, max=2185, avg=534.24, stdev=767.53 clat percentiles (msec): | 1.00th=[ 35], 5.00th=[ 35], 10.00th=[ 35], 20.00th=[ 83], | 30.00th=[ 84], 40.00th=[ 84], 50.00th=[ 163], 60.00th=[ 542], | 70.00th=[ 542], 80.00th=[ 651], 90.00th=[ 2198], 95.00th=[ 2198], | 99.00th=[ 2198], 99.50th=[ 2198], 99.90th=[ 2198], 99.95th=[ 2198], | 99.99th=[ 2198] bw ( KiB/s): min= 1400, max= 4096, per=55.46%, avg=2320.40, stdev=1030.05, samples=5 iops : min= 1, max= 4, avg= 1.80, stdev= 1.30, samples=5 write: IOPS=1, BW=1046KiB/s (1071kB/s)(5120KiB/4894msec); 0 zone resets clat (msec): min=94, max=593, avg=222.60, stdev=210.94 lat (msec): min=94, max=593, avg=222.68, stdev=210.94 clat percentiles (msec): | 1.00th=[ 94], 5.00th=[ 94], 10.00th=[ 94], 20.00th=[ 94], | 30.00th=[ 102], 40.00th=[ 102], 50.00th=[ 134], 60.00th=[ 134], | 70.00th=[ 192], 80.00th=[ 192], 90.00th=[ 592], 95.00th=[ 592], | 99.00th=[ 592], 99.50th=[ 592], 99.90th=[ 592], 99.95th=[ 592], | 99.99th=[ 592] bw ( KiB/s): min= 2043, max= 6144, per=69.88%, avg=4093.50, stdev=2899.84, samples=2 iops : min= 1, max= 6, avg= 3.50, stdev= 3.54, samples=2 lat (msec) : 50=8.33%, 100=25.00%, 250=33.33%, 750=25.00%, >=2000=8.33% cpu : usr=0.00%, sys=2.06%, ctx=59, 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=179802: Wed May 20 18:10:17 2026 read: IOPS=0, BW=456KiB/s (467kB/s)(2048KiB/4491msec) clat (msec): min=99, max=119, avg=109.63, stdev=14.52 lat (msec): min=99, max=119, avg=109.63, stdev=14.52 clat percentiles (msec): | 1.00th=[ 100], 5.00th=[ 100], 10.00th=[ 100], 20.00th=[ 100], | 30.00th=[ 100], 40.00th=[ 100], 50.00th=[ 100], 60.00th=[ 121], | 70.00th=[ 121], 80.00th=[ 121], 90.00th=[ 121], 95.00th=[ 121], | 99.00th=[ 121], 99.50th=[ 121], 99.90th=[ 121], 99.95th=[ 121], | 99.99th=[ 121] bw ( KiB/s): min= 1939, max= 2000, per=47.07%, avg=1969.50, stdev=43.13, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 write: IOPS=2, BW=2280KiB/s (2335kB/s)(10.0MiB/4491msec); 0 zone resets clat (msec): min=99, max=1997, avg=422.00, stdev=564.98 lat (msec): min=99, max=1997, avg=422.10, stdev=565.05 clat percentiles (msec): | 1.00th=[ 101], 5.00th=[ 101], 10.00th=[ 101], 20.00th=[ 148], | 30.00th=[ 163], 40.00th=[ 180], 50.00th=[ 213], 60.00th=[ 300], | 70.00th=[ 305], 80.00th=[ 326], 90.00th=[ 489], 95.00th=[ 2005], | 99.00th=[ 2005], 99.50th=[ 2005], 99.90th=[ 2005], 99.95th=[ 2005], | 99.99th=[ 2005] bw ( KiB/s): min= 3878, max= 4087, per=68.81%, avg=4030.75, stdev=102.11, samples=4 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=4 lat (msec) : 100=16.67%, 250=41.67%, 500=33.33%, 2000=8.33% cpu : usr=0.00%, sys=4.25%, ctx=76, 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=179803: Wed May 20 18:10:17 2026 read: IOPS=1, BW=1388KiB/s (1422kB/s)(6144KiB/4425msec) clat (msec): min=73, max=132, avg=105.78, stdev=24.74 lat (msec): min=73, max=132, avg=105.78, stdev=24.74 clat percentiles (msec): | 1.00th=[ 74], 5.00th=[ 74], 10.00th=[ 74], 20.00th=[ 87], | 30.00th=[ 87], 40.00th=[ 92], 50.00th=[ 92], 60.00th=[ 121], | 70.00th=[ 130], 80.00th=[ 130], 90.00th=[ 133], 95.00th=[ 133], | 99.00th=[ 133], 99.50th=[ 133], 99.90th=[ 133], 99.95th=[ 133], | 99.99th=[ 133] bw ( KiB/s): min= 2048, max= 4087, per=79.77%, avg=3337.67, stdev=1121.76, samples=3 iops : min= 2, max= 3, avg= 2.67, stdev= 0.58, samples=3 write: IOPS=1, BW=1388KiB/s (1422kB/s)(6144KiB/4425msec); 0 zone resets clat (msec): min=102, max=2162, avg=625.40, stdev=775.60 lat (msec): min=102, max=2162, avg=625.47, stdev=775.61 clat percentiles (msec): | 1.00th=[ 103], 5.00th=[ 103], 10.00th=[ 103], 20.00th=[ 199], | 30.00th=[ 199], 40.00th=[ 300], 50.00th=[ 300], 60.00th=[ 338], | 70.00th=[ 651], 80.00th=[ 651], 90.00th=[ 2165], 95.00th=[ 2165], | 99.00th=[ 2165], 99.50th=[ 2165], 99.90th=[ 2165], 99.95th=[ 2165], | 99.99th=[ 2165] bw ( KiB/s): min= 1939, max= 2748, per=37.43%, avg=2192.50, stdev=373.51, samples=4 iops : min= 1, max= 2, avg= 1.50, stdev= 0.58, samples=4 lat (msec) : 100=25.00%, 250=41.67%, 500=16.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=3.21%, ctx=63, 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=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=179804: Wed May 20 18:10:17 2026 read: IOPS=1, BW=1108KiB/s (1134kB/s)(5120KiB/4623msec) clat (msec): min=59, max=163, avg=103.39, stdev=44.40 lat (msec): min=59, max=163, avg=103.40, stdev=44.40 clat percentiles (msec): | 1.00th=[ 61], 5.00th=[ 61], 10.00th=[ 61], 20.00th=[ 61], | 30.00th=[ 74], 40.00th=[ 74], 50.00th=[ 84], 60.00th=[ 84], | 70.00th=[ 138], 80.00th=[ 138], 90.00th=[ 163], 95.00th=[ 163], | 99.00th=[ 163], 99.50th=[ 163], 99.90th=[ 163], 99.95th=[ 163], | 99.99th=[ 163] bw ( KiB/s): min= 3878, max= 4087, per=95.18%, avg=3982.50, stdev=147.79, samples=2 iops : min= 3, max= 3, avg= 3.00, stdev= 0.00, samples=2 write: IOPS=1, BW=1551KiB/s (1588kB/s)(7168KiB/4623msec); 0 zone resets clat (msec): min=118, max=2253, avg=583.17, stdev=754.02 lat (msec): min=119, max=2253, avg=583.25, stdev=754.03 clat percentiles (msec): | 1.00th=[ 120], 5.00th=[ 120], 10.00th=[ 120], 20.00th=[ 215], | 30.00th=[ 236], 40.00th=[ 236], 50.00th=[ 288], 60.00th=[ 338], | 70.00th=[ 338], 80.00th=[ 634], 90.00th=[ 2265], 95.00th=[ 2265], | 99.00th=[ 2265], 99.50th=[ 2265], 99.90th=[ 2265], 99.95th=[ 2265], | 99.99th=[ 2265] bw ( KiB/s): min= 1402, max= 3878, per=39.96%, avg=2340.75, stdev=1068.27, samples=4 iops : min= 1, max= 3, avg= 1.75, stdev= 0.96, samples=4 lat (msec) : 100=25.00%, 250=41.67%, 500=16.67%, 750=8.33%, >=2000=8.33% cpu : usr=0.00%, sys=3.12%, ctx=59, majf=0, minf=11 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=5,7,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=4185KiB/s (4285kB/s), 456KiB/s-1465KiB/s (467kB/s-1500kB/s), io=20.0MiB (20.0MB), run=4425-4894msec WRITE: bw=5859KiB/s (5999kB/s), 1046KiB/s-2280KiB/s (1071kB/s-2335kB/s), io=28.0MiB (29.4MB), run=4425-4894msec 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=179811: Wed May 20 18:10:28 2026 read: IOPS=1, BW=6383KiB/s (6537kB/s)(12.0MiB/1925msec) clat (msec): min=482, max=723, avg=630.29, stdev=129.47 lat (msec): min=482, max=723, avg=630.29, stdev=129.47 clat percentiles (msec): | 1.00th=[ 485], 5.00th=[ 485], 10.00th=[ 485], 20.00th=[ 485], | 30.00th=[ 485], 40.00th=[ 684], 50.00th=[ 684], 60.00th=[ 684], | 70.00th=[ 726], 80.00th=[ 726], 90.00th=[ 726], 95.00th=[ 726], | 99.00th=[ 726], 99.50th=[ 726], 99.90th=[ 726], 99.95th=[ 726], | 99.99th=[ 726] bw ( KiB/s): min= 6714, max= 8159, per=100.00%, avg=7436.50, stdev=1021.77, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=66.67% cpu : usr=0.00%, sys=16.68%, ctx=222, 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=179812: Wed May 20 18:10:28 2026 read: IOPS=0, BW=1549KiB/s (1586kB/s)(4096KiB/2645msec) clat (nsec): min=551321k, max=551321k, avg=551321455.00, stdev= 0.00 lat (nsec): min=551325k, max=551325k, avg=551324777.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 550], 5.00th=[ 550], 10.00th=[ 550], 20.00th=[ 550], | 30.00th=[ 550], 40.00th=[ 550], 50.00th=[ 550], 60.00th=[ 550], | 70.00th=[ 550], 80.00th=[ 550], 90.00th=[ 550], 95.00th=[ 550], | 99.00th=[ 550], 99.50th=[ 550], 99.90th=[ 550], 99.95th=[ 550], | 99.99th=[ 550] bw ( KiB/s): min= 6068, max= 6068, per=97.97%, avg=6068.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 write: IOPS=0, BW=3097KiB/s (3171kB/s)(8192KiB/2645msec); 0 zone resets clat (msec): min=573, max=1492, avg=1032.82, stdev=649.40 lat (msec): min=573, max=1492, avg=1033.15, stdev=649.42 clat percentiles (msec): | 1.00th=[ 575], 5.00th=[ 575], 10.00th=[ 575], 20.00th=[ 575], | 30.00th=[ 575], 40.00th=[ 575], 50.00th=[ 575], 60.00th=[ 1485], | 70.00th=[ 1485], 80.00th=[ 1485], 90.00th=[ 1485], 95.00th=[ 1485], | 99.00th=[ 1485], 99.50th=[ 1485], 99.90th=[ 1485], 99.95th=[ 1485], | 99.99th=[ 1485] bw ( KiB/s): min= 8159, max= 8159, per=65.86%, avg=8159.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=66.67%, 2000=33.33% cpu : usr=0.00%, sys=6.47%, ctx=94, 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=179813: Wed May 20 18:10:28 2026 write: IOPS=1, BW=5315KiB/s (5442kB/s)(12.0MiB/2312msec); 0 zone resets clat (msec): min=346, max=1102, avg=748.04, stdev=380.11 lat (msec): min=348, max=1109, avg=751.15, stdev=382.39 clat percentiles (msec): | 1.00th=[ 347], 5.00th=[ 347], 10.00th=[ 347], 20.00th=[ 347], | 30.00th=[ 347], 40.00th=[ 793], 50.00th=[ 793], 60.00th=[ 793], | 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= 8159, max= 8175, per=65.93%, 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=6.40%, ctx=86, 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=179814: Wed May 20 18:10:28 2026 write: IOPS=1, BW=6377KiB/s (6530kB/s)(12.0MiB/1927msec); 0 zone resets clat (msec): min=455, max=864, avg=622.28, stdev=214.70 lat (msec): min=455, max=864, avg=622.63, stdev=214.70 clat percentiles (msec): | 1.00th=[ 456], 5.00th=[ 456], 10.00th=[ 456], 20.00th=[ 456], | 30.00th=[ 456], 40.00th=[ 550], 50.00th=[ 550], 60.00th=[ 550], | 70.00th=[ 869], 80.00th=[ 869], 90.00th=[ 869], 95.00th=[ 869], | 99.00th=[ 869], 99.50th=[ 869], 99.90th=[ 869], 99.95th=[ 869], | 99.99th=[ 869] bw ( KiB/s): min= 7529, max= 8159, per=63.32%, avg=7844.00, stdev=445.48, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 750=33.33%, 1000=33.33% cpu : usr=0.00%, sys=10.28%, ctx=72, 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=6194KiB/s (6343kB/s), 1549KiB/s-6383KiB/s (1586kB/s-6537kB/s), io=16.0MiB (16.8MB), run=1925-2645msec WRITE: bw=12.1MiB/s (12.7MB/s), 3097KiB/s-6377KiB/s (3171kB/s-6530kB/s), io=32.0MiB (33.6MB), run=1927-2645msec rand-rw: (groupid=0, jobs=1): err= 0: pid=179815: Wed May 20 18:10:30 2026 read: IOPS=0, BW=3576KiB/s (3662kB/s)(12.0MiB/3436msec) clat (msec): min=344, max=1828, avg=1084.83, stdev=742.14 lat (msec): min=344, max=1828, avg=1084.83, stdev=742.14 clat percentiles (msec): | 1.00th=[ 347], 5.00th=[ 347], 10.00th=[ 347], 20.00th=[ 347], | 30.00th=[ 347], 40.00th=[ 1083], 50.00th=[ 1083], 60.00th=[ 1083], | 70.00th=[ 1821], 80.00th=[ 1821], 90.00th=[ 1821], 95.00th=[ 1821], | 99.00th=[ 1821], 99.50th=[ 1821], 99.90th=[ 1821], 99.95th=[ 1821], | 99.99th=[ 1821] bw ( KiB/s): min= 7907, max= 8159, per=100.00%, avg=8033.00, stdev=178.19, samples=2 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=2 lat (msec) : 500=33.33%, 2000=66.67% cpu : usr=0.00%, sys=2.74%, ctx=61, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=3,0,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179816: Wed May 20 18:10:30 2026 read: IOPS=0, BW=1207KiB/s (1236kB/s)(4096KiB/3394msec) clat (nsec): min=1251.0M, max=1251.0M, avg=1251005148.00, stdev= 0.00 lat (nsec): min=1251.0M, max=1251.0M, avg=1251006156.00, stdev= 0.00 clat percentiles (msec): | 1.00th=[ 1250], 5.00th=[ 1250], 10.00th=[ 1250], 20.00th=[ 1250], | 30.00th=[ 1250], 40.00th=[ 1250], 50.00th=[ 1250], 60.00th=[ 1250], | 70.00th=[ 1250], 80.00th=[ 1250], 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= 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=2414KiB/s (2472kB/s)(8192KiB/3394msec); 0 zone resets clat (msec): min=723, max=1240, avg=982.17, stdev=365.87 lat (msec): min=723, max=1241, avg=982.53, stdev=365.89 clat percentiles (msec): | 1.00th=[ 726], 5.00th=[ 726], 10.00th=[ 726], 20.00th=[ 726], | 30.00th=[ 726], 40.00th=[ 726], 50.00th=[ 726], 60.00th=[ 1234], | 70.00th=[ 1234], 80.00th=[ 1234], 90.00th=[ 1234], 95.00th=[ 1234], | 99.00th=[ 1234], 99.50th=[ 1234], 99.90th=[ 1234], 99.95th=[ 1234], | 99.99th=[ 1234] bw ( KiB/s): min= 7907, max= 7907, per=81.90%, avg=7907.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 750=33.33%, 2000=66.67% cpu : usr=0.00%, sys=3.51%, ctx=64, majf=0, minf=9 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=1,2,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179817: Wed May 20 18:10:30 2026 write: IOPS=0, BW=3887KiB/s (3981kB/s)(12.0MiB/3161msec); 0 zone resets clat (msec): min=309, max=1812, avg=1035.47, stdev=752.82 lat (msec): min=309, max=1815, avg=1037.15, stdev=754.17 clat percentiles (msec): | 1.00th=[ 309], 5.00th=[ 309], 10.00th=[ 309], 20.00th=[ 309], | 30.00th=[ 309], 40.00th=[ 986], 50.00th=[ 986], 60.00th=[ 986], | 70.00th=[ 1821], 80.00th=[ 1821], 90.00th=[ 1821], 95.00th=[ 1821], | 99.00th=[ 1821], 99.50th=[ 1821], 99.90th=[ 1821], 99.95th=[ 1821], | 99.99th=[ 1821] bw ( KiB/s): min= 8175, max= 8175, per=84.68%, avg=8175.00, stdev= 0.00, samples=1 iops : min= 1, max= 1, avg= 1.00, stdev= 0.00, samples=1 lat (msec) : 500=33.33%, 1000=33.33%, 2000=33.33% cpu : usr=0.00%, sys=3.29%, ctx=60, majf=0, minf=7 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 rand-rw: (groupid=0, jobs=1): err= 0: pid=179818: Wed May 20 18:10:30 2026 write: IOPS=1, BW=4917KiB/s (5035kB/s)(12.0MiB/2499msec); 0 zone resets clat (msec): min=400, max=1381, avg=800.98, stdev=514.96 lat (msec): min=400, max=1382, avg=801.85, stdev=514.58 clat percentiles (msec): | 1.00th=[ 401], 5.00th=[ 401], 10.00th=[ 401], 20.00th=[ 401], | 30.00th=[ 401], 40.00th=[ 625], 50.00th=[ 625], 60.00th=[ 625], | 70.00th=[ 1385], 80.00th=[ 1385], 90.00th=[ 1385], 95.00th=[ 1385], | 99.00th=[ 1385], 99.50th=[ 1385], 99.90th=[ 1385], 99.95th=[ 1385], | 99.99th=[ 1385] bw ( KiB/s): min= 7831, max= 8175, per=82.90%, avg=8003.00, stdev=243.24, 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=4.00%, ctx=45, majf=0, minf=8 IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts: total=0,3,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=16 Run status group 0 (all jobs): READ: bw=4768KiB/s (4883kB/s), 1207KiB/s-3576KiB/s (1236kB/s-3662kB/s), io=16.0MiB (16.8MB), run=3394-3436msec WRITE: bw=9655KiB/s (9886kB/s), 2414KiB/s-4917KiB/s (2472kB/s-5035kB/s), io=32.0MiB (33.6MB), run=2499-3394msec