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 Sat Jul 05, 2025 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3361371	99	46	43,2	cyclictest	3480748	-21	kworker/u8:4+events_unbound	09:20:15	1
3361371	99	45	41,3	cyclictest	3595021	-21	kworker/u8:0+flush-259:0	11:20:15	1
3361378	99	43	38,3	cyclictest	3000063	-21	rs:main		3
3361367	99	42	37,4	cyclictest	3392713	-21	kworker/u8:2+flush-259:0	08:00:25	0
3361371	99	40	37,2	cyclictest	3527655	-21	kworker/u8:0+events_unbound	10:40:15	1
3361371	99	40	37,2	cyclictest	3423642	-21	kworker/u8:1+flush-259:0	08:15:16	1
3361367	99	40	34,4	cyclictest	3402999	-21	latency_hist	07:50:01	0
3361367	99	40	34,4	cyclictest	3387976	-21	diskstats	07:35:15	0
3361371	99	39	36,2	cyclictest	3538396	-21	kworker/u8:4+flush-259:0	11:05:20	1
3361371	99	39	35,3	cyclictest	3392713	-21	kworker/u8:2+events_unbound	08:55:13	1
3361378	99	38	32,4	cyclictest	3595322	-21	/usr/sbin/munin	10:55:14	3
3361375	99	38	34,3	cyclictest	3522281	-21	gpgv	09:45:02	2
3361371	99	38	35,2	cyclictest	3480748	-21	kworker/u8:4+flush-259:0	09:10:16	1
3361371	99	38	35,2	cyclictest	3413360	-21	kworker/u8:3+events_unbound	08:10:22	1
3361371	99	38	35,2	cyclictest	3392713	-21	kworker/u8:2+events_unbound	08:50:17	1
3361371	99	37	34,2	cyclictest	3647578	-21	kworker/u8:2+events_unbound	12:30:26	1
3361375	99	36	32,3	cyclictest	3423642	-21	kworker/u8:1+events_unbound	08:14:59	2
3361371	99	36	33,2	cyclictest	3673108	-21	kworker/u8:0+flush-259:0	12:10:16	1
3361371	99	36	32,3	cyclictest	3413360	-21	kworker/u8:3+events_unbound	08:20:23	1
3361371	99	35	32,2	cyclictest	3683706	-21	kworker/u8:1+events_unbound	12:25:17	1
3361371	99	35	32,2	cyclictest	3668625	-21	base64	12:05:01	1
3361371	99	35	32,2	cyclictest	3392713	-21	kworker/u8:2+events_unbound	08:05:22	1
3361371	99	35	31,3	cyclictest	3683706	-21	kworker/u8:1+events_unbound	12:20:14	1
3361371	99	35	28,2	cyclictest	3538396	-21	kworker/u8:4+events_unbound	10:50:18	1
3361367	99	35	32,2	cyclictest	3346046	-21	kworker/u8:1+events_unbound	07:52:38	0
3361375	99	34	31,2	cyclictest	3637443	-21	kworker/u8:5+events_unbound	11:50:18	2
3361371	99	34	29,3	cyclictest	3366708	-21	/usr/sbin/munin	07:15:15	1
3361375	99	33	30,2	cyclictest	3595021	-21	kworker/u8:0+flush-259:0	11:15:22	2
3361375	99	33	30,2	cyclictest	3527655	-21	kworker/u8:0+flush-259:0	10:05:16	2
3361371	99	33	30,2	cyclictest	3647578	-21	kworker/u8:2+flush-259:0	11:55:25	1
3361371	99	33	30,2	cyclictest	3600474	-21	kworker/u8:2+events_unbound	11:00:22	1
3361371	99	33	26,3	cyclictest	3527655	-21	kworker/u8:0+events_unbound	10:20:00	1
3361367	99	33	29,3	cyclictest	3496501	-21	apt-get	09:20:13	0
3361371	99	32	29,2	cyclictest	3465513	-21	kworker/u8:3+events_unbound	09:00:22	1
3361371	99	32	29,2	cyclictest	3346046	-21	kworker/u8:1+events_unbound	07:30:23	1
3361375	99	31	28,2	cyclictest	3538396	-21	kworker/u8:4+flush-259:0	10:35:21	2
3361375	99	31	27,3	cyclictest	3392713	-21	kworker/u8:2+events_unbound	08:03:01	2
3361375	99	31	25,4	cyclictest	3484964	-21	ntpq	09:05:23	2
3361371	99	31	28,2	cyclictest	3480748	-21	kworker/u8:4+flush-259:0	09:05:15	1
3361371	99	31	27,3	cyclictest	3465513	-21	kworker/u8:3+events_unbound	09:30:14	1
3361367	99	31	28,2	cyclictest	3538396	-21	kworker/u8:4+flush-259:0	10:50:15	0
3361367	99	31	25,4	cyclictest	3754036	-21	systemd-journal	10:24:59	0
3361378	99	30	27,2	cyclictest	3673108	-21	kworker/u8:0+events_unbound	12:10:15	3
3361378	99	30	27,2	cyclictest	3647578	-21	kworker/u8:2+flush-259:0	12:05:20	3
3361375	99	30	27,2	cyclictest	3382419	-21	kworker/u8:3+flush-259:0	07:40:25	2
3361371	99	30	28,2	cyclictest	3501423	-21	kworker/u8:5+events_unbound	09:45:15	1
3361371	99	30	28,1	cyclictest	3554067	-21	kworker/u8:2+events_unbound	10:20:16	1
3361371	99	30	27,2	cyclictest	3673860	-21	kworker/u8:3+events_unbound	12:15:22	1
3361371	99	30	27,2	cyclictest	3595021	-21	kworker/u8:0+flush-259:0	11:15:29	1
3361371	99	30	27,2	cyclictest	3449798	-21	kworker/u8:1+events_unbound	08:45:19	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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