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2025-12-12 - 16:14
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 792 highest latencies:
System rackbslot1.osadl.org (updated Fri Dec 12, 2025 12:44:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9008532212184,19sleep20-21swapper/207:06:532
9009872202179,13sleep30-21swapper/307:08:353
9009012201172,19sleep00-21swapper/007:07:310
9008162190166,14sleep10-21swapper/107:06:281
901305997660,3cyclictest1061115-21CacheThread_Blo09:45:022
901308996965,3cyclictest1201120-21kworker/u8:2+flush-179:012:26:573
901302996750,5cyclictest1093178-21ntpq10:15:150
901308996649,14cyclictest247563-13Compositor11:45:003
901308996649,14cyclictest247563-13Compositor11:45:003
901302996460,3cyclictest1170452-21kworker/u8:5+flush-179:011:48:310
901308996358,3cyclictest1122767-21kworker/u8:2+events_unbound10:51:553
901305996359,3cyclictest1220974-21latency_hist12:35:012
901304996056,3cyclictest1132403-21kworker/u8:3+flush-179:012:31:001
901302996056,3cyclictest900773-21kworker/u8:0+flush-179:008:20:100
901308995956,2cyclictest999423-21snmp_ryswitch2.08:45:013
901308995956,2cyclictest900773-21kworker/u8:0+flush-179:008:35:103
901308995955,3cyclictest905287-21kworker/u8:4+events_unbound08:05:203
901308995955,3cyclictest1107342-21kworker/u8:1+flush-179:010:30:133
901308995753,3cyclictest1081112-21kworker/u8:5+flush-179:010:10:323
901308995752,3cyclictest1151980-21kworker/u8:1+flush-179:011:45:233
901305995754,2cyclictest900773-21kworker/u8:0+flush-179:009:15:312
901302995753,3cyclictest1050292-21kworker/u8:0+flush-179:009:45:130
901308995652,3cyclictest1050292-21kworker/u8:0+events_unbound10:20:223
901308995550,4cyclictest988653-21kworker/u8:3+flush-179:009:35:123
901305995551,3cyclictest1204607-21latency_hist12:15:002
901304995551,3cyclictest993995-21munin-update08:40:351
901302995550,4cyclictest1107342-21kworker/u8:1+events_unbound10:33:440
901302995538,15cyclictest247557-21chrome11:45:010
901302995538,15cyclictest247557-21chrome11:45:010
90130299550,54cyclictest3125728-13Compositor07:10:100
901308995450,3cyclictest1151980-21kworker/u8:1+flush-179:011:20:243
901308995450,3cyclictest1066568-21kworker/u8:1+flush-179:009:50:113
901308995449,4cyclictest1132403-21kworker/u8:3+flush-179:011:09:073
901302995450,3cyclictest1045198-21kworker/u8:4+flush-179:010:29:400
901302995449,4cyclictest978578-21kworker/u8:1+flush-179:008:35:270
9124232530,1chrt912382-21munin-update07:20:003
901308995349,3cyclictest1122878-21latency_hist10:45:023
901308995348,4cyclictest1132403-21kworker/u8:3+events_unbound10:56:353
901302995349,3cyclictest1091454-21kworker/u8:2+flush-179:010:20:190
901308995249,2cyclictest905287-21kworker/u8:4+events_unbound07:35:303
901308995249,2cyclictest1151980-21kworker/u8:1+events_unbound12:00:093
901308995247,4cyclictest1151980-21kworker/u8:1+flush-179:011:50:093
901305995248,3cyclictest1045198-21kworker/u8:4+flush-179:010:45:182
901302995247,3cyclictest1122767-21kworker/u8:2+events_unbound10:49:540
901302995246,4cyclictest1201120-21kworker/u8:2+flush-179:012:12:470
901302995245,3cyclictest978578-21kworker/u8:1+flush-179:008:45:200
901308995147,3cyclictest978578-21kworker/u8:1+flush-179:009:25:363
901308995147,3cyclictest247557-21chrome10:45:023
901302995147,2cyclictest1045198-21kworker/u8:4+flush-179:009:50:260
901302995145,5cyclictest1045198-21kworker/u8:4+flush-179:010:10:110
11472952510,1sleep0151ktimers/011:10:020
901308995045,4cyclictest900773-21kworker/u8:0+flush-179:007:55:123
901308995045,4cyclictest1045198-21kworker/u8:4+events_unbound09:55:293
901305995047,2cyclictest900773-21kworker/u8:0+flush-179:008:00:282
9739902490,1chrt973937-21/usr/share/muni08:20:033
901308994946,2cyclictest900773-21kworker/u8:0+flush-179:009:17:013
901308994945,3cyclictest900773-21kworker/u8:0+events_unbound09:05:083
901308994945,3cyclictest1128273-21kworker/u8:0+flush-179:011:15:153
901305994944,4cyclictest1040678-21/usr/share/muni09:25:092
901302994945,3cyclictest1128273-21kworker/u8:0+flush-179:011:05:400
901302994945,3cyclictest1050292-21kworker/u8:0+flush-179:009:35:240
901302994944,4cyclictest1201120-21kworker/u8:2+events_unbound12:18:520
901302994942,3cyclictest952870-21kworker/u8:1+flush-179:008:00:080
901308994845,2cyclictest1045198-21kworker/u8:4+events_unbound10:05:323
901308994844,3cyclictest76405-21systemd-journal12:20:533
901308994844,3cyclictest1151980-21kworker/u8:1+flush-179:011:30:223
901308994841,3cyclictest978578-21kworker/u8:1+flush-179:008:30:353
901305994845,2cyclictest1201120-21kworker/u8:2+flush-179:012:25:062
901305994844,3cyclictest999385-21CacheThread_Blo08:45:012
901305994844,3cyclictest1102438-21/usr/share/muni10:25:162
901304994842,5cyclictest980268-21apt-get08:25:131
901302994844,3cyclictest1128273-21kworker/u8:0+flush-179:010:50:220
901302994841,2cyclictest1151980-21kworker/u8:1+flush-179:011:34:220
901308994744,2cyclictest967767-21kworker/u8:2+events_unbound08:55:253
901308994743,3cyclictest1050292-21kworker/u8:0+flush-179:010:00:173
901305994743,3cyclictest1050292-21kworker/u8:0+flush-179:010:00:172
901305994742,4cyclictest958614-21/usr/share/muni08:05:142
901304994742,4cyclictest3125687-21ThreadPoolForeg11:40:151
901304994742,4cyclictest3125687-21ThreadPoolForeg11:40:151
901302994744,2cyclictest900773-21kworker/u8:0+flush-179:007:30:010
901302994743,3cyclictest988653-21kworker/u8:3+flush-179:009:30:010
901302994743,3cyclictest978578-21kworker/u8:1+flush-179:008:40:240
901302994743,3cyclictest1107342-21kworker/u8:1+events_unbound10:35:390
901302994742,3cyclictest937773-21kworker/u8:2+flush-179:007:45:110
901302994741,4cyclictest1132403-21kworker/u8:3+events_unbound11:00:290
901308994643,2cyclictest905287-21kworker/u8:4+flush-179:007:50:333
901308994642,3cyclictest900773-21kworker/u8:0+flush-179:009:20:233
901308994642,3cyclictest900773-21kworker/u8:0+events_unbound08:10:433
901308994642,3cyclictest900773-21kworker/u8:0+events_unbound08:10:433
901308994642,3cyclictest864810-21kworker/u8:1+flush-179:007:20:293
901308994642,3cyclictest864810-21kworker/u8:1+flush-179:007:20:283
901305994643,2cyclictest1132403-21kworker/u8:3+flush-179:010:55:162
901304994638,6cyclictest922789-21/usr/share/muni07:30:171
901302994644,2cyclictest905287-21kworker/u8:4+flush-179:007:15:070
901302994643,2cyclictest1045198-21kworker/u8:4+flush-179:011:25:160
10204402460,1chrt1020436-21snmp_wanswitch.09:05:041
901308994542,2cyclictest900773-21kworker/u8:0+events_unbound08:40:093
901308994541,3cyclictest900773-21kworker/u8:0+events_unbound09:00:293
901308994541,3cyclictest1102116-21kworker/u8:3+flush-179:010:25:153
901308994541,3cyclictest1045198-21kworker/u8:4+flush-179:011:04:043
901308994540,4cyclictest1151980-21kworker/u8:1+flush-179:011:14:213
901308994540,4cyclictest1061092-21/usr/share/muni09:45:043
901305994529,15cyclictest105470-21isc-net-000007:50:462
901304994541,3cyclictest1066568-21kworker/u8:1+flush-179:010:03:161
901302994541,3cyclictest958041-21kworker/u8:3+flush-179:008:06:330
901302994541,3cyclictest1151980-21kworker/u8:1+flush-179:011:15:260
901302994541,3cyclictest1132403-21kworker/u8:3+events_unbound12:05:260
901302994541,3cyclictest1045198-21kworker/u8:4+flush-179:009:40:190
901302994540,4cyclictest1128273-21kworker/u8:0+flush-179:010:57:590
901302994540,3cyclictest900773-21kworker/u8:0+flush-179:007:35:160
901302994538,5cyclictest76405-21systemd-journal12:35:020
901308994441,2cyclictest1170452-21kworker/u8:5+flush-179:011:58:383
901308994440,3cyclictest988653-21kworker/u8:3+flush-179:009:10:283
901308994440,3cyclictest988653-21kworker/u8:3+flush-179:009:10:283
901308994440,3cyclictest1132403-21kworker/u8:3+flush-179:012:35:243
901308994440,3cyclictest1066568-21kworker/u8:1+flush-179:010:15:173
901305994426,15cyclictest1179645-21chrome11:45:012
901305994426,15cyclictest1179645-21chrome11:45:012
901304994441,2cyclictest574429-1kworker/1:2H+kblockd08:32:171
901304994431,1cyclictest574429-1kworker/1:2H+kblockd08:54:551
901304994429,14cyclictest1260-21snmpd11:47:181
901302994440,3cyclictest978578-21kworker/u8:1+flush-179:008:30:320
901302994440,3cyclictest905287-21kworker/u8:4+flush-179:007:40:140
901302994440,3cyclictest1132403-21kworker/u8:3+flush-179:011:55:250
901302994439,4cyclictest978578-21kworker/u8:1+events_unbound09:06:510
901302994439,4cyclictest905287-21kworker/u8:4+flush-179:008:15:270
901302994439,2cyclictest978578-21kworker/u8:1+flush-179:009:30:150
901302994438,4cyclictest1159128-21apt-get11:20:140
901302994438,4cyclictest1019430-31munin-html09:00:420
90130299441,41cyclictest3125728-13Compositor12:02:410
901308994340,2cyclictest905287-21kworker/u8:4+events_unbound08:15:273
901308994340,2cyclictest1170452-21kworker/u8:5+flush-179:012:08:553
901308994339,3cyclictest952870-21kworker/u8:1+events_unbound08:00:003
901308994333,2cyclictest1024732-1kworker/3:2H+kblockd11:28:043
90130499430,3cyclictest247561-21ThreadPoolForeg07:57:051
901302994338,4cyclictest1045198-21kworker/u8:4+events_unbound11:39:380
901302994338,4cyclictest1045198-21kworker/u8:4+events_unbound11:39:380
901302994312,30cyclictest3125627-21ChromeDriver00:55:190
901302994312,30cyclictest3125627-21ChromeDriver00:55:190
901308994238,3cyclictest1170452-21kworker/u8:5+events_unbound12:10:083
901305994239,2cyclictest937817-21munin-update07:45:022
901305994238,3cyclictest1045198-21kworker/u8:4+flush-179:011:10:072
901305994237,4cyclictest1176061-21latency_hist11:40:012
901305994237,4cyclictest1176061-21latency_hist11:40:012
901304994238,3cyclictest76405-21systemd-journal08:05:011
901304994235,5cyclictest1196573-21/usr/share/muni12:05:031
901304994229,12cyclictest574429-1kworker/1:2H+kblockd08:36:361
901302994239,2cyclictest988653-21kworker/u8:3+flush-179:008:58:050
901302994238,3cyclictest905287-21kworker/u8:4+flush-179:007:50:290
901302994238,3cyclictest900773-21kworker/u8:0+flush-179:008:51:540
901302994238,3cyclictest900773-21kworker/u8:0+flush-179:008:12:150
901302994238,3cyclictest900773-21kworker/u8:0+flush-179:008:12:150
901308994139,2cyclictest978578-21kworker/u8:1+flush-179:009:30:243
901308994137,3cyclictest905287-21kworker/u8:4+flush-179:007:10:313
901308994137,3cyclictest1201120-21kworker/u8:2+events_unbound12:15:293
901305994138,2cyclictest905287-21kworker/u8:4+flush-179:007:20:372
901305994138,2cyclictest905287-21kworker/u8:4+flush-179:007:20:372
901305994138,2cyclictest900773-21kworker/u8:0+flush-179:008:50:292
90130599413,37cyclictest0-21swapper/210:16:092
901305994129,1cyclictest1192950-21kworker/2:1+pm12:01:592
90130599411,14cyclictest247557-21chrome11:21:162
901304994136,4cyclictest978578-21kworker/u8:1+flush-179:009:00:001
901304994134,5cyclictest76405-21systemd-journal09:40:001
901304994134,5cyclictest1112773-21/usr/share/muni10:35:041
901304994134,5cyclictest1081361-21munin-update10:05:341
901302994137,3cyclictest1107342-21kworker/u8:1+events_unbound10:41:180
901302994135,4cyclictest900773-21kworker/u8:0+flush-179:007:55:280
901302994133,6cyclictest1035599-21/usr/share/muni09:20:140
901308994036,3cyclictest869701-21kworker/u8:3+events_unbound07:25:073
901305994038,1cyclictest953034-21kworker/2:2+pm09:03:282
901305994038,1cyclictest1046275-21kworker/2:1+pm10:32:042
901305994037,2cyclictest953034-21kworker/2:2+pm08:13:142
901305994037,2cyclictest953034-21kworker/2:2+pm08:13:142
901305994037,2cyclictest901092-21kworker/2:0+pm07:38:112
901305994037,2cyclictest1046275-21kworker/2:1+pm09:37:412
90130599401,15cyclictest247545-13VizCompositorTh10:50:352
901304994036,3cyclictest905287-21kworker/u8:4+flush-179:008:15:291
901302994037,2cyclictest988653-21kworker/u8:3+flush-179:009:15:180
901302994036,3cyclictest1066568-21kworker/u8:1+flush-179:009:56:480
901302994036,3cyclictest1050292-21kworker/u8:0+events_unbound10:02:050
901302994034,4cyclictest978578-21kworker/u8:1+flush-179:008:25:170
901308993935,3cyclictest900773-21kworker/u8:0+flush-179:007:43:043
901305993938,1cyclictest1170582-21kworker/2:0+pm12:39:092
901305993937,1cyclictest974703-21kworker/2:0+pm08:20:342
901305993937,1cyclictest968554-21kworker/2:3+pm08:16:352
901305993937,1cyclictest953034-21kworker/2:2+pm08:26:412
901305993937,1cyclictest953034-21kworker/2:2+pm07:58:462
901305993937,1cyclictest1170582-21kworker/2:0+pm11:51:542
901305993937,1cyclictest1046275-21kworker/2:1+pm10:39:312
901305993936,2cyclictest953034-21kworker/2:2+pm09:10:482
901305993936,2cyclictest953034-21kworker/2:2+pm09:10:472
901305993936,2cyclictest953034-21kworker/2:2+pm09:05:042
901305993936,2cyclictest953034-21kworker/2:2+pm08:58:192
901305993936,2cyclictest953034-21kworker/2:2+pm08:43:542
901305993936,2cyclictest1046275-21kworker/2:1+pm10:14:362
901305993935,3cyclictest900773-21kworker/u8:0+flush-179:007:15:062
901305993935,3cyclictest1050292-21kworker/u8:0+flush-179:010:23:372
901305993923,14cyclictest30209-1kworker/2:2H+kblockd10:40:002
90130599391,6cyclictest247563-13Compositor11:55:372
90130599391,4cyclictest247557-21chrome07:31:132
901305993913,25cyclictest978578-21kworker/u8:1+flush-179:008:30:152
901304993934,3cyclictest1045913-1kworker/1:0H+kblockd11:00:011
901304993933,4cyclictest1072246-21apt-get09:55:131
901308993835,2cyclictest1107342-21kworker/u8:1+events_unbound10:35:093
901308993834,3cyclictest927376-21kworker/u8:1+events_unbound07:45:063
901308993834,3cyclictest1132403-21kworker/u8:3+flush-179:012:31:543
901308993834,3cyclictest1132403-21kworker/u8:3+events_unbound11:38:523
901308993834,3cyclictest1132403-21kworker/u8:3+events_unbound11:38:523
90130899381,4cyclictest247557-21chrome09:42:393
901305993836,1cyclictest953034-21kworker/2:2+pm08:35:172
901305993836,1cyclictest901092-21kworker/2:0+pm07:40:082
901305993836,1cyclictest901092-21kworker/2:0+pm07:29:092
901305993836,1cyclictest1170582-21kworker/2:0+pm12:16:052
901305993836,1cyclictest1170582-21kworker/2:0+pm12:08:252
901305993836,1cyclictest1157138-21kworker/2:3+pm11:31:572
901305993836,1cyclictest1046275-21kworker/2:1+pm09:59:542
901305993836,1cyclictest1046275-21kworker/2:1+pm09:43:332
901305993835,2cyclictest953034-21kworker/2:2+pm09:31:372
901305993835,2cyclictest1157138-21kworker/2:3+pm11:17:022
901305993835,2cyclictest1046275-21kworker/2:1+pm09:52:532
901305993833,4cyclictest1045198-21kworker/u8:4+flush-179:011:04:452
90130599381,12cyclictest1167467-31munin-graph11:26:102
90130599380,2cyclictest1081756-21apache_accesses10:05:062
901304993836,1cyclictest574429-1kworker/1:2H+kblockd09:16:091
901304993835,2cyclictest1045913-1kworker/1:0H+kblockd12:39:291
901304993835,2cyclictest1045913-1kworker/1:0H+kblockd11:07:361
901304993834,3cyclictest1045913-1kworker/1:0H+kblockd11:27:591
901304993831,5cyclictest76405-21systemd-journal11:35:011
901304993830,6cyclictest247560-21ThreadPoolForeg10:53:581
901302993834,3cyclictest1132403-21kworker/u8:3+flush-179:012:29:530
901302993833,4cyclictest1066568-21kworker/u8:1+flush-179:010:05:220
901308993733,4cyclictest900773-21kworker/u8:0+events_unbound08:28:193
901308993733,3cyclictest905287-21kworker/u8:4+flush-179:007:30:213
901305993735,1cyclictest953034-21kworker/2:2+pm09:20:282
901305993735,1cyclictest1170582-21kworker/2:0+pm12:23:562
901305993735,1cyclictest1170582-21kworker/2:0+pm11:46:312
901305993734,2cyclictest900773-21kworker/u8:0+flush-179:007:10:052
901304993734,2cyclictest574429-1kworker/1:2H+kblockd09:13:271
901304993734,2cyclictest574429-1kworker/1:2H+kblockd09:13:261
901304993734,2cyclictest574429-1kworker/1:2H+kblockd09:02:251
901304993734,2cyclictest574429-1kworker/1:2H+kblockd07:29:181
901304993734,2cyclictest1170452-21kworker/u8:5+flush-179:012:20:191
901304993734,2cyclictest1045913-1kworker/1:0H+kblockd11:23:571
901304993734,2cyclictest1045913-1kworker/1:0H+kblockd10:11:261
901304993734,2cyclictest1045913-1kworker/1:0H+kblockd09:51:551
901304993733,3cyclictest1132403-21kworker/u8:3+flush-179:011:38:261
901304993733,3cyclictest1132403-21kworker/u8:3+flush-179:011:38:261
901304993731,4cyclictest912470-21/usr/share/muni07:20:111
901304993731,4cyclictest912470-21/usr/share/muni07:20:111
901304993729,6cyclictest1045758-21/usr/share/muni09:30:021
901302993733,3cyclictest900773-21kworker/u8:0+flush-179:007:33:000
901308993633,2cyclictest900773-21kworker/u8:0+events_unbound08:53:203
901305993634,1cyclictest1143518-21kworker/2:0+pm11:05:042
901304993634,1cyclictest574429-1kworker/1:2H+kblockd08:48:561
901304993634,1cyclictest574429-1kworker/1:2H+kblockd07:54:311
901304993634,1cyclictest1045913-1kworker/1:0H+kblockd10:33:191
901304993634,1cyclictest1045913-1kworker/1:0H+kblockd09:45:141
901304993633,2cyclictest574429-1kworker/1:2H+kblockd09:22:041
901304993633,2cyclictest1045913-1kworker/1:0H+kblockd12:12:001
901304993633,2cyclictest1045913-1kworker/1:0H+kblockd12:03:391
901304993633,2cyclictest1045913-1kworker/1:0H+kblockd11:11:391
901304993633,2cyclictest1045913-1kworker/1:0H+kblockd10:57:181
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901304993633,2cyclictest1045913-1kworker/1:0H+kblockd10:25:291
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901304993633,2cyclictest1045913-1kworker/1:0H+kblockd09:43:571
901304993631,4cyclictest1213108-21/usr/share/muni12:25:011
901304993630,5cyclictest1098811-21diskstats10:20:161
901304993629,5cyclictest3125688-21Chrome_ChildIOT07:45:361
901302993633,2cyclictest725015-1kworker/0:1H+kblockd12:34:520
901302993621,3cyclictest247560-21ThreadPoolForeg11:50:090
901304993533,1cyclictest574429-1kworker/1:2H+kblockd07:12:371
901304993532,2cyclictest1045913-1kworker/1:0H+kblockd11:17:391
901304993531,3cyclictest1170452-21kworker/u8:5+flush-179:011:50:331
901304993531,2cyclictest574429-1kworker/1:2H+kblockd09:25:281
901304993433,1cyclictest574429-1kworker/1:2H+kblockd08:23:251
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901304993431,2cyclictest1045913-1kworker/1:0H+kblockd11:59:491
901304993418,15cyclictest1107342-21kworker/u8:1+flush-179:010:40:241
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901304993330,2cyclictest574429-1kworker/1:2H+kblockd07:37:571
901304993318,3cyclictest3125708-13Chrome_ChildIOT08:06:191
901302993328,4cyclictest1151980-21kworker/u8:1+flush-179:012:21:040
901304993230,1cyclictest574429-1kworker/1:2H+kblockd07:17:241
901304993229,2cyclictest574429-1kworker/1:2H+kblockd08:12:281
901304993229,2cyclictest574429-1kworker/1:2H+kblockd08:12:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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