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2026-07-12 - 05:26

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #6

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 the 792 highest latencies:
System rackeslot6s.osadl.org (updated Sun Jul 12, 2026 00:44:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
410765199941,69cyclictest0-21swapper/322:45:203
410765199901,58cyclictest0-21swapper/300:15:013
410765199901,58cyclictest0-21swapper/300:15:013
4107648998910,42cyclictest0-21swapper/119:10:181
410765199852,78cyclictest4127586-21http21:05:023
4107645997616,22cyclictest4127579-21apt-get21:05:020
4107649997025,36cyclictest0-21swapper/220:55:302
4107645997062,6cyclictest0-21swapper/000:00:010
4107649996926,37cyclictest0-21swapper/222:55:292
4107649996823,41cyclictest4108366-21grep19:10:292
410764899666,38cyclictest0-21swapper/122:45:211
4107649996516,6cyclictest0-21swapper/221:00:202
410764899658,29cyclictest0-21swapper/122:20:021
4107649996425,34cyclictest0-21swapper/222:25:292
4107649996423,32cyclictest0-21swapper/220:00:012
4107649996354,5cyclictest4141183-21munin-plugin-st22:25:002
4107648996317,21cyclictest0-21swapper/123:55:011
4107649996220,34cyclictest0-21swapper/221:15:332
4107648996221,16cyclictest0-21swapper/121:10:001
410764599627,37cyclictest12-21ksoftirqd/020:50:010
4107649996120,5cyclictest0-21swapper/222:50:292
4107649996028,27cyclictest0-21swapper/223:15:322
4107649996019,6cyclictest0-21swapper/221:45:192
4107649996019,6cyclictest0-21swapper/220:00:312
4107649996018,10cyclictest0-21swapper/222:50:012
4107649995922,9cyclictest1660-21snmpd19:20:182
410764999592,18cyclictest4163995-21grep00:35:312
4107648995937,10cyclictest0-21swapper/120:30:121
4107648995937,10cyclictest0-21swapper/120:30:121
410764899590,36cyclictest0-21swapper/121:05:011
4107649995836,16cyclictest4117261-21kworker/u8:0-ext4-rsv-conversion20:20:012
4107648995834,13cyclictest0-21swapper/120:25:151
410764899581,29cyclictest4122707-21/usr/sbin/munin20:35:191
4107645995847,8cyclictest0-21swapper/022:25:020
4107649995718,34cyclictest0-21swapper/219:35:202
4107648995741,11cyclictest0-21swapper/120:15:121
4107648995737,13cyclictest0-21swapper/122:35:121
4107648995734,9cyclictest0-21swapper/121:55:171
4107645995749,5cyclictest4142863-21munin-plugin-st22:35:010
4107645995749,5cyclictest4142863-21munin-plugin-st22:35:010
4107645995735,12cyclictest14-21rcu_preempt22:15:010
4107649995620,31cyclictest0-21swapper/223:35:002
4107649995615,6cyclictest0-21swapper/222:05:162
4107649995614,36cyclictest274-21systemd-journal20:45:002
4107648995645,9cyclictest0-21swapper/123:40:111
4107648995639,12cyclictest0-21swapper/121:15:171
4107648995638,12cyclictest0-21swapper/100:15:121
4107648995638,12cyclictest0-21swapper/100:15:121
4107648995636,7cyclictest0-21swapper/100:35:141
4107648995636,14cyclictest0-21swapper/123:35:151
4107648995636,14cyclictest0-21swapper/123:35:151
4107649995525,24cyclictest4152167-21grep23:25:292
4107649995519,9cyclictest0-21swapper/221:30:022
4107648995538,12cyclictest0-21swapper/120:40:131
4107648995534,14cyclictest4155332-21/usr/sbin/munin23:45:261
4107648995527,10cyclictest0-21swapper/100:10:121
4107649995419,5cyclictest0-21swapper/220:50:282
4107648995446,3cyclictest4135467-21apt-get21:50:111
4107648995446,3cyclictest4135467-21apt-get21:50:111
4107648995438,11cyclictest0-21swapper/123:30:121
4107648995436,9cyclictest4113691-21tail19:40:271
4107648995436,12cyclictest0-21swapper/122:25:141
4107648995434,12cyclictest4158766-21cut00:05:271
4107648995432,9cyclictest0-21swapper/122:50:131
410764599547,45cyclictest12-21ksoftirqd/000:00:180
410764599546,19cyclictest15-21rcuc/019:15:000
4107649995313,7cyclictest0-21swapper/220:30:302
4107649995313,7cyclictest0-21swapper/220:30:302
410764999531,27cyclictest0-21swapper/220:05:172
4107648995337,10cyclictest4150529-21sshd23:18:331
4107648995337,10cyclictest0-21swapper/119:50:141
4107648995334,13cyclictest4152000-21/usr/sbin/munin23:25:271
4107649995216,8cyclictest0-21swapper/220:35:292
4107648995238,8cyclictest4130771-21/usr/sbin/munin21:20:271
4107648995235,10cyclictest4126382-21/usr/sbin/munin20:55:261
4107648995234,12cyclictest4134926-21/usr/sbin/munin21:45:231
4107648995233,12cyclictest4129030-21/usr/sbin/munin21:10:271
4107648995233,12cyclictest4129030-21/usr/sbin/munin21:10:261
4107648995232,13cyclictest4124642-21/usr/sbin/munin20:45:231
4107648995229,8cyclictest4117261-21kworker/u8:0+flush-179:9620:20:051
4107648995135,12cyclictest4125311-21/usr/sbin/munin20:50:181
4107648995135,10cyclictest0-21swapper/123:00:101
4107648995135,10cyclictest0-21swapper/100:00:141
4107648995134,8cyclictest4156968-21/usr/sbin/munin23:55:261
4107648995134,12cyclictest4133495-21/usr/sbin/munin21:35:281
4107648995134,11cyclictest4148641-21/usr/sbin/munin23:05:281
4107648995134,10cyclictest4138076-21/usr/sbin/munin22:05:191
4107648995133,11cyclictest4144219-21/usr/sbin/munin22:40:251
4107648995132,12cyclictest4115692-21/usr/sbin/munin19:55:161
4107648995131,14cyclictest4137403-21/usr/sbin/munin22:00:231
4107648995131,13cyclictest4117812-21/usr/sbin/munin20:05:231
4107648995131,12cyclictest4138846-21/usr/sbin/munin22:10:141
4107648995131,10cyclictest0-21swapper/121:30:121
4107645995145,4cyclictest0-21swapper/021:30:120
4107645995142,4cyclictest4120834-21munin-plugin-st20:25:010
410764999504,16cyclictest4160131-21cut00:15:192
410764999504,16cyclictest4160131-21cut00:15:182
4107649995013,5cyclictest0-21swapper/221:55:232
4107649995011,10cyclictest0-21swapper/223:20:292
4107648995040,7cyclictest4142519-21/usr/sbin/munin22:30:231
4107648995040,7cyclictest4142519-21/usr/sbin/munin22:30:231
4107648995038,8cyclictest4131319-21diskstats21:25:171
4107648995038,7cyclictest0-21swapper/100:20:151
4107648995038,6cyclictest4146487-21/usr/sbin/munin22:55:171
4107648995035,8cyclictest4116986-21/usr/sbin/munin20:00:281
4107648995035,8cyclictest4111873-21/usr/sbin/munin19:30:291
4107648995035,8cyclictest4111873-21/usr/sbin/munin19:30:291
4107648995035,10cyclictest0-21swapper/123:10:131
4107648995034,9cyclictest4150973-21/usr/sbin/munin23:20:221
4107648995033,10cyclictest4112871-21/usr/sbin/munin19:35:301
4107648995032,12cyclictest4119013-21/usr/sbin/munin20:10:271
410764899500,37cyclictest4161735-21/usr/sbin/munin00:25:181
410764599508,17cyclictest15-21rcuc/023:40:020
410764999495,14cyclictest0-21swapper/220:45:192
4107649994922,22cyclictest0-21swapper/200:20:302
4107649994917,4cyclictest0-21swapper/221:25:012
4107648994935,8cyclictest4134243-21/usr/sbin/munin21:40:271
4107648994934,9cyclictest4110097-21/usr/sbin/munin19:20:271
4107648994934,9cyclictest4109378-21/usr/sbin/munin19:15:301
4107649994818,3cyclictest0-21swapper/220:30:002
4107648994833,10cyclictest4110848-21/usr/sbin/munin19:25:251
4107648994832,10cyclictest4163005-21/usr/sbin/munin00:30:271
4107645994829,13cyclictest131ktimers/000:30:130
4107649994736,7cyclictest311ktimers/223:50:142
410764999472,17cyclictest4140238-21grep22:15:272
4107649994716,6cyclictest0-21swapper/200:10:282
4107648994737,7cyclictest4114057-21/usr/sbin/munin19:45:151
4107645994741,3cyclictest167350irq/118-8000000.ethernet-tx000:20:190
4107645994729,13cyclictest0-21swapper/019:55:290
4107645994713,29cyclictest15-21rcuc/022:45:200
4107648994637,6cyclictest4139740-21/usr/sbin/munin22:15:161
4107645994639,4cyclictest167350irq/118-8000000.ethernet-tx000:35:210
410764999458,11cyclictest0-21swapper/223:10:272
4107649994531,9cyclictest0-21swapper/223:05:012
4107649994522,7cyclictest4133559-21sshd21:39:332
410764599451,3cyclictest4162551-21sort00:30:010
410764599451,3cyclictest14-21rcu_preempt20:50:270
410764599451,39cyclictest4121192-21lsblk20:25:220
410764999446,13cyclictest4128299-21ptp4l-jitter21:05:302
410764999443,23cyclictest880-21avahi-daemon00:00:012
4107645994439,3cyclictest20650irq/252-8000000.ethernet19:50:270
4107645994437,4cyclictest20650irq/252-8000000.ethernet00:15:000
4107645994437,4cyclictest167350irq/118-8000000.ethernet-tx021:35:240
4107645994435,5cyclictest4129611-21ssh21:15:190
4107645994433,6cyclictest4124026-21sendmail_mailst20:40:270
410764599442,9cyclictest0-21swapper/023:40:010
410764599442,9cyclictest0-21swapper/023:40:010
4107645994422,17cyclictest131ktimers/021:45:140
4107649994327,7cyclictest0-21swapper/200:00:402
4107645994336,5cyclictest0-21swapper/023:50:280
4107645994336,4cyclictest167350irq/118-8000000.ethernet-tx020:15:240
4107645994325,16cyclictest0-21swapper/022:05:110
410764599431,36cyclictest4151931-21phc2sys23:25:250
410764599425,32cyclictest0-21swapper/021:25:010
4107645994233,5cyclictest167350irq/118-8000000.ethernet-tx021:55:290
4107645994229,8cyclictest0-21swapper/020:55:300
4107645994225,10cyclictest4122408-21sed20:30:290
4107645994225,10cyclictest4122408-21sed20:30:280
410764599421,3cyclictest0-21swapper/019:25:010
410764599421,38cyclictest4113306-21grep19:40:200
410764599421,2cyclictest0-21swapper/000:10:000
4107649994133,4cyclictest0-21swapper/219:45:282
4107649994132,4cyclictest0-21swapper/222:40:292
4107649994131,6cyclictest0-21swapper/221:50:292
4107649994131,6cyclictest0-21swapper/221:50:292
4107649994131,5cyclictest0-21swapper/222:00:292
4107649994117,6cyclictest311ktimers/200:25:162
4107645994127,9cyclictest4127794-21latency_hist21:05:020
410764599412,10cyclictest0-21swapper/023:35:010
410764599411,38cyclictest0-21swapper/019:30:300
410764599411,38cyclictest0-21swapper/019:30:300
410764599411,38cyclictest0-21swapper/000:15:260
410764599411,38cyclictest0-21swapper/000:15:260
410764599411,37cyclictest4109059-21tune2fs19:15:200
4107649994020,6cyclictest4133785-21/usr/sbin/munin21:40:262
4107648994027,8cyclictest4107734-21cat19:10:011
4107645994034,3cyclictest0-21swapper/023:10:280
4107645994033,4cyclictest0-21swapper/022:45:000
4107645994024,14cyclictest0-21swapper/022:35:100
410764599401,5cyclictest4147957-21latency_hist23:05:010
410764599401,32cyclictest4123279-21sed20:35:280
410764599401,2cyclictest0-21swapper/020:15:010
4107645994011,22cyclictest0-21swapper/022:55:010
4107649993916,3cyclictest0-21swapper/219:10:022
4107645993933,4cyclictest0-21swapper/023:05:220
4107645993932,4cyclictest0-21swapper/023:20:000
4107645993932,4cyclictest0-21swapper/020:00:020
4107645993921,16cyclictest0-21swapper/019:35:200
410764599391,36cyclictest0-21swapper/021:10:250
410764599391,36cyclictest0-21swapper/021:10:240
4107649993826,5cyclictest4120750-21grep20:20:292
4107645993827,5cyclictest4155534-21grep23:45:290
4107645993821,15cyclictest0-21swapper/019:25:260
410764599381,35cyclictest0-21swapper/020:05:190
410764599381,35cyclictest0-21swapper/019:45:160
410764999374,7cyclictest0-21swapper/222:35:012
410764999374,7cyclictest0-21swapper/222:35:012
4107645993728,4cyclictest0-21swapper/022:55:230
4107645993724,10cyclictest0-21swapper/022:25:270
410764599371,34cyclictest0-21swapper/021:50:130
410764599371,34cyclictest0-21swapper/021:50:130
4107645993631,3cyclictest0-21swapper/021:25:130
4107645993629,4cyclictest0-21swapper/022:15:120
410764599362,3cyclictest4137722-21grep22:00:280
4107649993526,4cyclictest0-21swapper/200:30:272
4107649993525,7cyclictest0-21swapper/219:20:012
4107649993522,9cyclictest0-21swapper/222:15:002
4107649993424,5cyclictest0-21swapper/221:10:292
4107649993424,5cyclictest0-21swapper/221:10:292
4107645993428,4cyclictest20850irq/208-8000000.ethernet21:40:210
410764999337,18cyclictest14-21rcu_preempt23:05:022
4107649993321,8cyclictest0-21swapper/219:40:272
4107649993320,9cyclictest0-21swapper/219:35:012
4107649993320,9cyclictest0-21swapper/219:35:002
410764599331,30cyclictest0-21swapper/023:24:240
4107649993222,6cyclictest4115435-21grep19:50:302
4107649993122,5cyclictest0-21swapper/221:30:282
4107649993121,4cyclictest0-21swapper/223:40:182
4107649993119,8cyclictest0-21swapper/223:35:292
4107649993119,8cyclictest0-21swapper/223:35:282
410764999311,27cyclictest4143681-21sshd22:37:332
4107649992820,4cyclictest0-21swapper/223:45:242
4107649992816,9cyclictest0-21swapper/219:25:322
410764999281,25cyclictest0-21swapper/220:10:342
4107649992718,4cyclictest0-21swapper/200:05:282
4107645992621,3cyclictest4107688-21cat19:10:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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