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2026-04-18 - 03:45

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of all highest latencies:
System rackeslot4s.osadl.org (updated Sat Apr 18, 2026 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
819019994341,2cyclictest953773-21kworker/u8:2+flush-259:021:50:001
819019994238,2cyclictest1026640-21kworker/u8:1+flush-259:023:45:151
819017994239,2cyclictest1026640-21kworker/u8:1+events_unbound22:40:220
819025994037,2cyclictest985347-21kworker/u8:0+flush-259:022:15:213
819025993936,2cyclictest834152-21kworker/u8:2+events_unbound19:40:213
819017993933,4cyclictest252-21systemd-journal19:21:230
819017993835,2cyclictest834152-21kworker/u8:2+events_unbound19:48:250
819017993832,4cyclictest984404-21ntpq21:45:200
819017993735,2cyclictest839644-21kworker/u8:3+events_unbound19:41:220
819017993733,3cyclictest1021269-21kworker/u8:3+events_unbound22:27:240
819017993731,4cyclictest818936-21latency_hist19:10:010
819017993730,5cyclictest252-21systemd-journal20:24:590
819025993634,1cyclictest814024-21kworker/u8:1+flush-259:019:15:243
819025993631,4cyclictest1057592-21latency_hist23:00:013
819019993633,2cyclictest1026640-21kworker/u8:1+flush-259:022:40:001
819017993632,3cyclictest1139784-21kworker/u8:1+events_unbound00:36:240
819017993632,3cyclictest1119875-21kworker/u8:0+events_unbound23:58:010
819025993531,2cyclictest839644-21kworker/u8:3+flush-259:019:45:243
819019993532,2cyclictest834152-21kworker/u8:2+flush-259:019:35:201
819017993532,2cyclictest1139784-21kworker/u8:1+events_unbound00:33:040
819025993431,2cyclictest933485-21kworker/u8:1+flush-259:021:00:243
819025993431,2cyclictest839644-21kworker/u8:3+flush-259:019:30:243
819025993430,3cyclictest814024-21kworker/u8:1+events_unbound19:15:013
819019993431,2cyclictest839644-21kworker/u8:3+flush-259:020:35:241
819017993431,2cyclictest985347-21kworker/u8:0+events_unbound22:02:240
819025993330,2cyclictest969949-21kworker/u8:3+flush-259:021:45:003
819025993329,3cyclictest1130492-21kworker/u8:2+flush-259:000:25:173
819025993329,3cyclictest1130492-21kworker/u8:2+flush-259:000:20:213
819025993326,3cyclictest870602-21kworker/u8:1+events_unbound20:10:213
819019993330,2cyclictest870602-21kworker/u8:1+flush-259:020:15:151
819019993329,3cyclictest933485-21kworker/u8:1+flush-259:021:05:241
819017993331,2cyclictest839644-21kworker/u8:3+events_unbound20:06:230
819017993330,2cyclictest1109912-21kworker/u8:3+events_unbound00:00:140
819017993330,2cyclictest1099062-21kworker/u8:2+events_unbound23:52:580
819017993330,2cyclictest1099062-21kworker/u8:2+events_unbound23:43:240
819017993329,3cyclictest933485-21kworker/u8:1+events_unbound21:12:240
819017993327,4cyclictest1073043-21latency_hist23:15:010
819025993229,2cyclictest907434-21kworker/u8:2+flush-259:020:45:173
819025993229,2cyclictest907434-21kworker/u8:2+flush-259:020:45:173
819025993229,2cyclictest1130492-21kworker/u8:2+flush-259:000:15:153
819019993229,2cyclictest1052349-21kworker/u8:0+flush-259:022:55:171
819019993229,2cyclictest1021269-21kworker/u8:3+flush-259:023:00:201
819017993229,3cyclictest1021269-21kworker/u8:3+events_unbound23:02:250
819017993229,2cyclictest985347-21kworker/u8:0+events_unbound21:51:250
819017993229,2cyclictest907434-21kworker/u8:2+events_unbound20:52:230
819017993229,2cyclictest839644-21kworker/u8:3+events_unbound19:57:240
819017993228,3cyclictest1109912-21kworker/u8:3+events_unbound00:07:240
819025993128,2cyclictest953773-21kworker/u8:2+flush-259:021:55:013
819019993129,1cyclictest985347-21kworker/u8:0+events_unbound22:10:141
819019993126,4cyclictest1093168-21ntpq23:30:211
819019993126,3cyclictest252-21systemd-journal19:35:001
819017993128,3cyclictest975276-21kworker/u8:1+events_unbound22:05:260
819017993128,2cyclictest975276-21kworker/u8:1+events_unbound21:43:230
819017993128,2cyclictest953773-21kworker/u8:2+events_unbound21:27:240
819017993128,2cyclictest923169-21kworker/u8:3+events_unbound20:56:050
819017993128,2cyclictest870602-21kworker/u8:1+events_unbound20:18:250
819017993127,3cyclictest985347-21kworker/u8:0+events_unbound22:19:240
819017993123,5cyclictest907616-21latency_hist20:35:010
819025993027,2cyclictest834152-21kworker/u8:2+flush-259:019:50:203
819025993025,3cyclictest834152-21kworker/u8:2+events_unbound19:25:183
819019993024,5cyclictest869728-21ntpq19:55:201
819017993027,2cyclictest1026640-21kworker/u8:1+events_unbound23:06:180
819017993027,2cyclictest1026640-21kworker/u8:1+events_unbound23:06:180
819017993026,3cyclictest975276-21kworker/u8:1+events_unbound22:22:250
819017993026,3cyclictest1021269-21kworker/u8:3+events_unbound23:28:260
819025992927,1cyclictest1021269-21kworker/u8:3+flush-259:023:25:003
819025992926,2cyclictest1026640-21kworker/u8:1+flush-259:023:40:003
819025992920,2cyclictest1119875-21kworker/u8:0+flush-259:000:00:183
819022992924,3cyclictest509-21rs:main2
819022992923,4cyclictest933680-21/usr/sbin/munin21:00:142
819019992925,3cyclictest970172-21apt-get21:35:121
819017992926,2cyclictest985347-21kworker/u8:0+events_unbound22:11:100
819025992825,2cyclictest870602-21kworker/u8:1+flush-259:020:40:243
819025992825,2cyclictest1119875-21kworker/u8:0+flush-259:000:15:013
819025992825,2cyclictest1006151-21kworker/u8:2+flush-259:022:25:003
819017992825,2cyclictest959839-21kworker/u8:0+events_unbound21:39:230
819017992825,2cyclictest849961-21kworker/u8:0+events_unbound20:04:240
819017992825,2cyclictest1140252-21kworker/u8:4+events_unbound00:15:270
819025992724,2cyclictest933485-21kworker/u8:1+events_unbound21:05:163
819025992724,2cyclictest923169-21kworker/u8:3+events_unbound20:55:003
819025992724,2cyclictest907434-21kworker/u8:2+flush-259:021:00:003
819025992724,2cyclictest870602-21kworker/u8:1+events_unbound20:05:153
819025992724,2cyclictest839644-21kworker/u8:3+events_unbound20:20:223
819022992723,3cyclictest975276-21kworker/u8:1+events_unbound21:55:252
819019992724,2cyclictest990715-21kworker/u8:3+flush-259:022:05:211
819017992724,2cyclictest1130492-21kworker/u8:2+events_unbound00:28:230
819017992724,2cyclictest1026640-21kworker/u8:1+events_unbound22:32:240
819025992624,2cyclictest943760-21kworker/u8:0+events_unbound21:15:183
819025992623,2cyclictest1083349-21kworker/u8:0+flush-259:023:30:213
819025992622,3cyclictest1099453-21apt-get23:40:123
819022992623,2cyclictest975276-21kworker/u8:1+flush-259:021:50:212
819022992622,3cyclictest975276-21kworker/u8:1+flush-259:021:45:242
819019992623,2cyclictest985347-21kworker/u8:0+flush-259:022:05:011
819019992623,2cyclictest834152-21kworker/u8:2+flush-259:019:50:191
819019992623,2cyclictest1139784-21kworker/u8:1+events_unbound00:30:141
819017992623,2cyclictest839644-21kworker/u8:3+events_unbound20:25:240
819017992623,2cyclictest839644-21kworker/u8:3+events_unbound20:10:430
81901799261,23cyclictest1-21systemd19:26:230
819025992522,2cyclictest1088698-21gpgv23:30:003
819025992522,2cyclictest1026640-21kworker/u8:1+flush-259:022:50:183
819025992520,4cyclictest1057850-21apt-get23:00:113
819022992521,3cyclictest870602-21kworker/u8:1+events_unbound20:40:152
819022992521,3cyclictest1083349-21kworker/u8:0+events_unbound23:35:142
819019992522,2cyclictest839644-21kworker/u8:3+flush-259:020:25:191
819019992522,2cyclictest824178-21kworker/u8:3+flush-259:019:20:211
819019992521,3cyclictest933485-21kworker/u8:1+flush-259:021:00:151
819019992521,3cyclictest1130492-21kworker/u8:2+events_unbound00:25:121
819017992522,2cyclictest1130492-21kworker/u8:2+events_unbound00:13:240
819017992518,5cyclictest1051501-21ntpq22:50:200
819017992517,6cyclictest1046386-21ntpq22:45:190
819025992421,2cyclictest959193-21apt-get21:25:023
819025992421,2cyclictest1026640-21kworker/u8:1+flush-259:022:40:253
819025992420,2cyclictest870602-21kworker/u8:1+events_unbound20:30:183
819022992421,2cyclictest917683-21kworker/u8:0+flush-259:020:53:202
819022992420,3cyclictest1139784-21kworker/u8:1+flush-259:000:30:212
819022992420,3cyclictest1130492-21kworker/u8:2+flush-259:000:25:262
819022992420,3cyclictest1130492-21kworker/u8:2+events_unbound00:35:242
819022992420,3cyclictest1119875-21kworker/u8:0+events_unbound00:05:122
819022992420,3cyclictest1026640-21kworker/u8:1+flush-259:023:05:152
819022992420,3cyclictest1026640-21kworker/u8:1+flush-259:023:05:152
819022992419,4cyclictest1099062-21kworker/u8:2+events_unbound23:50:172
819022992418,4cyclictest1082435-21ntpq23:20:192
819019992421,2cyclictest1026640-21kworker/u8:1+flush-259:022:45:101
819019992420,3cyclictest985347-21kworker/u8:0+events_unbound22:25:271
819019992420,3cyclictest953773-21kworker/u8:2+flush-259:021:20:151
819019992420,3cyclictest870602-21kworker/u8:1+events_unbound20:10:221
819019992419,4cyclictest1016579-21apt-get22:20:111
819017992421,2cyclictest1140252-21kworker/u8:4+events_unbound00:23:320
819017992420,3cyclictest1083349-21kworker/u8:0+events_unbound23:33:210
81901799241,21cyclictest1-21systemd21:34:230
819025992320,2cyclictest990715-21kworker/u8:3+events_unbound21:55:153
819025992320,2cyclictest839644-21kworker/u8:3+flush-259:020:25:143
819025992320,2cyclictest839644-21kworker/u8:3+flush-259:020:15:203
819025992320,2cyclictest1026640-21kworker/u8:1+events_unbound23:10:163
819025992316,2cyclictest1139784-21kworker/u8:1+events_unbound00:30:183
819022992319,3cyclictest990715-21kworker/u8:3+events_unbound22:00:192
819022992319,3cyclictest839644-21kworker/u8:3+events_unbound19:30:192
819022992317,4cyclictest509-21rs:main2
819022992317,4cyclictest1016314-21latency_hist22:20:002
819019992321,1cyclictest1026640-21kworker/u8:1+events_unbound22:40:141
819019992320,2cyclictest969949-21kworker/u8:3+flush-259:021:40:211
819019992320,2cyclictest870602-21kworker/u8:1+events_unbound20:40:231
819019992320,2cyclictest1099062-21kworker/u8:2+flush-259:023:40:251
819019992320,2cyclictest1006151-21kworker/u8:2+flush-259:022:35:001
819019992319,3cyclictest870602-21kworker/u8:1+events_unbound20:24:241
819019992319,3cyclictest509-21rs:main1
819017992316,5cyclictest252-21systemd-journal23:48:230
819025992219,2cyclictest990715-21kworker/u8:3+events_unbound22:05:243
819025992219,2cyclictest953773-21kworker/u8:2+flush-259:021:35:243
819025992219,2cyclictest839644-21kworker/u8:3+flush-259:019:40:003
819025992219,2cyclictest839644-21kworker/u8:3+events_unbound20:04:593
819025992218,3cyclictest814024-21kworker/u8:1+flush-259:019:20:103
819022992219,2cyclictest1026640-21kworker/u8:1+flush-259:023:10:202
819022992217,3cyclictest1130492-21kworker/u8:2+flush-259:000:15:182
819022992217,3cyclictest1037409-21diskstats22:40:132
819019992219,2cyclictest943760-21kworker/u8:0+flush-259:021:15:201
819019992219,2cyclictest1026640-21kworker/u8:1+events_unbound23:25:191
819019992218,3cyclictest975276-21kworker/u8:1+flush-259:021:55:241
819019992218,3cyclictest1140252-21kworker/u8:4+events_unbound00:18:311
819019992218,3cyclictest1109912-21kworker/u8:3+events_unbound00:00:241
819017992219,2cyclictest1021269-21kworker/u8:3+events_unbound23:24:250
819017992218,3cyclictest1026640-21kworker/u8:1+events_unbound23:17:240
819025992118,2cyclictest953773-21kworker/u8:2+events_unbound21:20:143
819025992118,2cyclictest933485-21kworker/u8:1+events_unbound21:13:233
819025992118,2cyclictest1099062-21kworker/u8:2+events_unbound23:50:133
819025992116,4cyclictest1160597-21ntpq00:35:213
819022992118,2cyclictest907434-21kworker/u8:2+events_unbound20:45:202
819022992118,2cyclictest907434-21kworker/u8:2+events_unbound20:45:202
819022992118,2cyclictest1021269-21kworker/u8:3+events_unbound23:00:222
819022992117,3cyclictest985347-21kworker/u8:0+flush-259:022:30:152
819022992117,3cyclictest834152-21kworker/u8:2+flush-259:019:40:212
819022992116,4cyclictest943760-21kworker/u8:0+events_unbound21:15:242
819022992116,3cyclictest252-21systemd-journal23:31:232
819019992117,3cyclictest1130492-21kworker/u8:2+events_unbound00:39:261
819019992117,3cyclictest1052349-21kworker/u8:0+events_unbound23:10:141
819019992116,3cyclictest1083349-21kworker/u8:0+events_unbound23:35:181
819017992118,2cyclictest907434-21kworker/u8:2+events_unbound20:46:140
819017992118,2cyclictest907434-21kworker/u8:2+events_unbound20:46:140
819017992118,2cyclictest1083349-21kworker/u8:0+events_unbound23:36:070
819017992117,3cyclictest923169-21kworker/u8:3+events_unbound21:24:320
819017992117,3cyclictest923169-21kworker/u8:3+events_unbound21:05:010
819025992017,2cyclictest1099062-21kworker/u8:2+events_unbound23:49:243
819025992017,2cyclictest1052349-21kworker/u8:0+events_unbound23:05:293
819025992017,2cyclictest1052349-21kworker/u8:0+events_unbound23:05:283
819025992016,3cyclictest1052349-21kworker/u8:0+events_unbound23:16:193
819022992017,2cyclictest953773-21kworker/u8:2+events_unbound21:20:222
819022992017,2cyclictest814024-21kworker/u8:1+events_unbound19:20:132
819022992017,2cyclictest1099062-21kworker/u8:2+flush-259:023:55:202
819022992017,2cyclictest1026640-21kworker/u8:1+flush-259:023:25:172
819022992016,3cyclictest923169-21kworker/u8:3+flush-259:021:10:002
819022992016,3cyclictest834152-21kworker/u8:2+events_unbound19:25:222
819022992016,3cyclictest1119875-21kworker/u8:0+flush-259:000:05:002
819022992016,3cyclictest1006151-21kworker/u8:2+events_unbound22:13:232
819022992014,4cyclictest979318-21ntpq21:40:192
819019992017,2cyclictest834152-21kworker/u8:2+flush-259:019:40:251
819019992017,2cyclictest1026640-21kworker/u8:1+flush-259:022:50:231
819019992016,3cyclictest876366-21cp20:05:011
819019992016,3cyclictest1109912-21kworker/u8:3+flush-259:000:10:151
819019992016,3cyclictest1021269-21kworker/u8:3+flush-259:023:21:241
819019992015,3cyclictest509-21rs:main1
819017992018,2cyclictest1021269-21kworker/u8:3+events_unbound22:36:010
819017992017,2cyclictest923169-21kworker/u8:3+events_unbound21:15:020
819017992017,2cyclictest870602-21kworker/u8:1+events_unbound20:41:220
819017992017,2cyclictest839644-21kworker/u8:3+events_unbound19:33:050
819025991917,2cyclictest1099062-21kworker/u8:2+flush-259:023:55:153
819025991916,2cyclictest985347-21kworker/u8:0+flush-259:022:11:233
819025991916,2cyclictest1119875-21kworker/u8:0+events_unbound00:06:233
819025991915,3cyclictest953773-21kworker/u8:2+events_unbound21:34:573
819025991915,3cyclictest839644-21kworker/u8:3+events_unbound20:35:233
819022991916,2cyclictest839644-21kworker/u8:3+flush-259:020:25:212
819022991915,3cyclictest923169-21kworker/u8:3+flush-259:021:15:002
819022991915,3cyclictest870602-21kworker/u8:1+flush-259:020:30:152
819022991915,3cyclictest834152-21kworker/u8:2+events_unbound19:35:202
819022991915,3cyclictest1021269-21kworker/u8:3+events_unbound22:57:242
819022991914,4cyclictest975276-21kworker/u8:1+flush-259:022:20:232
819019991916,2cyclictest953773-21kworker/u8:2+flush-259:021:30:191
819019991912,5cyclictest932513-21ntpq20:55:191
819017991916,2cyclictest923169-21kworker/u8:3+events_unbound21:04:570
819017991915,3cyclictest870602-21kworker/u8:1+events_unbound20:37:250
819022991815,2cyclictest1109912-21kworker/u8:3+flush-259:000:10:222
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819022991711,5cyclictest252-21systemd-journal19:50:002
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*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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