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 here to display the system's profile data or here to proceed to next system.

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 50 highest latencies:

System rackeslot4s.osadl.org (updated Tue Feb 10, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3583439	99	45	42,2	cyclictest	3655839	-21	kworker/u8:3+events_unbound	08:25:16	2
3583439	99	44	41,2	cyclictest	3604005	-21	kworker/u8:3+events_unbound	07:40:17	2
3583439	99	44	41,2	cyclictest	3598708	-21	kworker/u8:2+events_unbound	07:35:22	2
3583439	99	44	40,3	cyclictest	3655839	-21	kworker/u8:3+events_unbound	08:30:18	2
3583434	99	44	41,2	cyclictest	3618975	-21	kworker/u8:0+flush-259:0	07:55:16	1
3583441	99	43	38,4	cyclictest	3879364	-21	cat	11:55:01	3
3583434	99	43	40,2	cyclictest	3858178	-21	kworker/u8:0+flush-259:0	12:20:16	1
3583434	99	43	40,2	cyclictest	3858178	-21	kworker/u8:0+flush-259:0	11:40:15	1
3583434	99	43	40,2	cyclictest	3661036	-21	kworker/u8:0+events_unbound	08:25:24	1
3583441	99	42	39,2	cyclictest	3618975	-21	kworker/u8:0+events_unbound	08:05:15	3
3583431	99	42	38,3	cyclictest	3811590	-21	kworker/u8:4+flush-259:0	11:05:18	0
3583439	99	41	37,3	cyclictest	3811590	-21	kworker/u8:4+events_unbound	12:25:29	2
3583431	99	40	36,3	cyclictest	3863562	-21	apt-get	11:40:12	0
3583439	99	39	36,2	cyclictest	3733616	-21	kworker/u8:3+events_unbound	09:50:16	2
3583439	99	39	36,2	cyclictest	3530166	-21	kworker/u8:5+events_unbound	07:10:23	2
3583434	99	38	35,2	cyclictest	3775247	-21	kworker/u8:3+events_unbound	10:30:22	1
3583434	99	38	35,2	cyclictest	3577942	-21	kworker/u8:1+flush-259:0	07:45:15	1
3583434	99	38	35,2	cyclictest	3577942	-21	kworker/u8:1+flush-259:0	07:45:00	1
3583434	99	38	34,3	cyclictest	3635202	-21	apt-get	08:00:11	1
3583439	99	37	32,2	cyclictest	3655632	-21	kworker/u8:1+events_unbound	08:24:07	2
3583434	99	37	34,2	cyclictest	3858178	-21	kworker/u8:0+flush-259:0	12:05:15	1
3583434	99	37	34,2	cyclictest	3666639	-21	kworker/u8:4+flush-259:0	08:45:16	1
3583441	99	36	32,3	cyclictest	3666639	-21	kworker/u8:4+flush-259:0	08:50:00	3
3583434	99	36	33,2	cyclictest	3795775	-21	kworker/u8:1+flush-259:0	11:35:16	1
3583434	99	36	32,3	cyclictest	3739018	-21	kworker/u8:1+flush-259:0	09:55:15	1
3583434	99	36	32,3	cyclictest	3577942	-21	kworker/u8:1+events_unbound	07:10:17	1
3583434	99	35	32,2	cyclictest	3604005	-21	kworker/u8:3+events_unbound	07:50:22	1
3583434	99	35	31,3	cyclictest	3811590	-21	kworker/u8:4+flush-259:0	11:10:16	1
3583431	99	35	31,3	cyclictest	3915872	-21	apt-get	12:30:12	0
3583439	99	34	31,2	cyclictest	3795775	-21	kworker/u8:1+events_unbound	10:40:27	2
3583439	99	34	31,2	cyclictest	3795775	-21	kworker/u8:1+events_unbound	10:40:27	2
3583434	99	34	31,2	cyclictest	3655839	-21	kworker/u8:3+flush-259:0	08:50:15	1
3583434	99	34	31,2	cyclictest	3530166	-21	kworker/u8:5+flush-259:0	07:20:23	1
3583434	99	34	30,3	cyclictest	3739018	-21	kworker/u8:1+flush-259:0	10:19:59	1
3583434	99	34	30,3	cyclictest	3733616	-21	kworker/u8:3+events_unbound	09:40:19	1
3583439	99	33	30,2	cyclictest	3811590	-21	kworker/u8:4+events_unbound	10:57:07	2
3583439	99	33	30,2	cyclictest	3795775	-21	kworker/u8:1+events_unbound	11:35:11	2
3583439	99	33	30,2	cyclictest	3629819	-21	kworker/u8:2+events_unbound	08:13:58	2
3583434	99	33	29,3	cyclictest	3848140	-21	apt-get	11:25:12	1
3583434	99	33	29,3	cyclictest	3666494	-21	base64	08:30:01	1
3583434	99	33	29,3	cyclictest	252	-21	systemd-journal	08:15:01	1
3583434	99	33	28,4	cyclictest	252	-21	systemd-journal	09:49:59	1
3583439	99	32	29,2	cyclictest	3811590	-21	kworker/u8:4+events_unbound	11:26:07	2
3583439	99	32	29,2	cyclictest	3811590	-21	kworker/u8:4+events_unbound	11:10:27	2
3583439	99	32	29,2	cyclictest	3811590	-21	kworker/u8:4+events_unbound	11:05:28	2
3583439	99	32	29,2	cyclictest	3733616	-21	kworker/u8:3+events_unbound	09:45:29	2
3583439	99	32	29,2	cyclictest	3655839	-21	kworker/u8:3+events_unbound	09:00:30	2
3583434	99	32	29,2	cyclictest	3681584	-21	kworker/u8:0+events_unbound	09:15:31	1
3583434	99	32	28,3	cyclictest	3811590	-21	kworker/u8:4+events_unbound	12:00:25	1
3583441	99	31	28,2	cyclictest	3707462	-21	kworker/u8:2+flush-259:0	09:10:25	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34