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 100 highest latencies:

System rackeslot4s.osadl.org (updated Sat Feb 07, 2026 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2852720	99	55	50,3	cyclictest	2925545	-21	base64	20:20:01	1
2852717	99	44	39,3	cyclictest	3023944	-21	apt-get	21:55:00	0
2852717	99	43	39,3	cyclictest	2883629	-21	kworker/u8:0+events_unbound	20:00:14	0
2852717	99	42	37,3	cyclictest	2894190	-21	apt-get	19:50:10	0
2852727	99	41	37,3	cyclictest	2925014	-21	apt-get	20:16:09	3
2852717	99	38	32,4	cyclictest	3039859	-21	kworker/u8:0+flush-259:0	23:10:25	0
2852720	99	37	31,4	cyclictest	3143833	-21	apt-get	23:55:10	1
2852720	99	37	31,4	cyclictest	3071021	-21	/usr/sbin/munin	22:40:14	1
2852717	99	36	32,3	cyclictest	2924933	-21	kworker/u8:1+events_unbound	21:00:13	0
2852723	99	35	31,3	cyclictest	3112565	-21	kworker/u8:1+flush-259:0	23:35:14	2
2852720	99	35	29,3	cyclictest	252	-21	systemd-journal	21:25:09	1
2852720	99	35	29,3	cyclictest	252	-21	systemd-journal	21:25:09	1
2852717	99	35	31,3	cyclictest	2847764	-21	kworker/u8:3+events_unbound	19:25:20	0
2852727	99	34	29,3	cyclictest	3039859	-21	kworker/u8:0+flush-259:0	23:45:19	3
2852717	99	34	31,2	cyclictest	2962544	-21	kworker/u8:0+events_unbound	21:15:14	0
2852717	99	34	30,3	cyclictest	2924933	-21	kworker/u8:1+flush-259:0	21:00:00	0
2852727	99	33	26,4	cyclictest	2889008	-21	/usr/sbin/munin	19:45:15	3
2852717	99	33	30,2	cyclictest	3040074	-21	kworker/u8:4+flush-259:0	22:15:21	0
2852717	99	33	28,3	cyclictest	3065838	-21	kworker/u8:4+events_unbound	22:40:13	0
2852717	99	32	29,2	cyclictest	3133137	-21	kworker/u8:2+flush-259:0	23:55:20	0
2852723	99	31	25,4	cyclictest	3190877	-21	latency_hist	00:40:01	2
2852717	99	31	24,4	cyclictest	3008425	-21	latency_hist	21:40:01	0
2852717	99	31	1,28	cyclictest	1	-21	systemd	23:39:09	0
2852727	99	30	26,3	cyclictest	3039859	-21	kworker/u8:0+flush-259:0	23:50:25	3
2852727	99	30	22,6	cyclictest	3086262	-21	latency_hist	22:55:01	3
2852717	99	30	27,2	cyclictest	3065838	-21	kworker/u8:4+events_unbound	22:35:14	0
2852717	99	30	26,3	cyclictest	2899107	-21	kworker/u8:3+events_unbound	21:30:17	0
2852717	99	30	25,4	cyclictest	3112901	-21	apt-get	23:25:12	0
2852717	99	29	25,3	cyclictest	2941520	-21	apt-get	20:35:12	0
2852717	99	29	25,3	cyclictest	2873534	-21	kworker/u8:4+events_unbound	19:38:10	0
2852720	99	28	23,4	cyclictest	2873327	-21	kworker/u8:2+flush-259:0	19:55:26	1
2852717	99	28	22,4	cyclictest	252	-21	systemd-journal	00:28:09	0
2852727	99	27	23,3	cyclictest	3159643	-21	kworker/u8:1+flush-259:0	00:20:26	3
2852727	99	27	20,5	cyclictest	3024121	-21	cp	21:55:00	3
2852727	99	27	20,5	cyclictest	3008421	-21	awk	21:40:00	3
2852723	99	27	19,5	cyclictest	252	-21	systemd-journal	00:20:12	2
2852727	99	26	20,4	cyclictest	2899107	-21	kworker/u8:3+flush-259:0	20:25:27	3
2852727	99	26	20,4	cyclictest	252	-21	systemd-journal	23:03:09	3
2852727	99	26	18,5	cyclictest	2857815	-21	latency_hist	19:15:00	3
2852723	99	26	20,4	cyclictest	3164723	-21	gpgv	00:15:01	2
2852723	99	26	19,5	cyclictest	2977429	-21	latency_hist	21:10:00	2
2852720	99	26	20,4	cyclictest	3013853	-21	apt-get	21:45:10	1
2852717	99	26	23,2	cyclictest	3039859	-21	kworker/u8:0+events_unbound	23:19:59	0
2852717	99	26	23,2	cyclictest	2914773	-21	kworker/u8:2+flush-259:0	20:10:21	0
2852717	99	26	23,2	cyclictest	2842678	-21	kworker/u8:0+events_unbound	19:10:24	0
2852717	99	26	23,2	cyclictest	2842678	-21	kworker/u8:0+events_unbound	19:10:23	0
2852717	99	26	22,3	cyclictest	2899107	-21	kworker/u8:3+events_unbound	21:05:19	0
2852720	99	25	22,2	cyclictest	252	-21	systemd-journal	19:35:09	1
2852717	99	25	22,2	cyclictest	3159643	-21	kworker/u8:1+events_unbound	00:10:19	0
2852717	99	25	22,2	cyclictest	3039859	-21	kworker/u8:0+flush-259:0	23:45:21	0
2852717	99	25	21,3	cyclictest	3039859	-21	kworker/u8:0+flush-259:0	23:50:16	0
2852717	99	25	21,2	cyclictest	2899107	-21	kworker/u8:3+flush-259:0	21:25:00	0
2852727	99	24	20,3	cyclictest	3039859	-21	kworker/u8:0+events_unbound	23:20:10	3
2852727	99	24	19,3	cyclictest	2893790	-21	kworker/u8:1+flush-259:0	20:05:15	3
2852727	99	24	18,4	cyclictest	3040110	-21	apt-get	22:10:10	3
2852723	99	24	18,4	cyclictest	252	-21	systemd-journal	23:10:00	2
2852717	99	24	21,2	cyclictest	2924933	-21	kworker/u8:1+events_unbound	20:50:12	0
2852717	99	24	21,2	cyclictest	2883629	-21	kworker/u8:0+events_unbound	20:20:22	0
2852717	99	24	21,2	cyclictest	2857806	-21	kworker/u8:1+events_unbound	19:20:24	0
2852717	99	24	20,3	cyclictest	2847764	-21	kworker/u8:3+flush-259:0	19:30:22	0
2852717	99	24	19,4	cyclictest	2914665	-21	gpgv	20:10:00	0
2852717	99	24	18,4	cyclictest	2883843	-21	/usr/sbin/munin	19:40:14	0
2852727	99	23	17,4	cyclictest	2997198	-21	kworker/u8:4+flush-259:0	21:45:15	3
2852717	99	23	20,2	cyclictest	3148730	-21	kworker/u8:4+events_unbound	00:05:20	0
2852717	99	23	20,2	cyclictest	3107093	-21	kworker/u8:3+flush-259:0	23:40:21	0
2852717	99	23	20,2	cyclictest	3107093	-21	kworker/u8:3+flush-259:0	23:40:20	0
2852717	99	23	20,2	cyclictest	2899107	-21	kworker/u8:3+flush-259:0	20:25:16	0
2852717	99	23	20,2	cyclictest	2899107	-21	kworker/u8:3+events_unbound	21:10:15	0
2852717	99	23	19,3	cyclictest	3133137	-21	kworker/u8:2+events_unbound	00:20:13	0
2852717	99	23	19,3	cyclictest	3055348	-21	kworker/u8:2+flush-259:0	22:30:24	0
2852717	99	23	19,3	cyclictest	3039859	-21	kworker/u8:0+flush-259:0	23:24:59	0
2852717	99	23	19,3	cyclictest	2987940	-21	kworker/u8:2+events_unbound	21:25:18	0
2852717	99	23	19,3	cyclictest	2987940	-21	kworker/u8:2+events_unbound	21:25:17	0
2852717	99	23	19,3	cyclictest	2883629	-21	kworker/u8:0+flush-259:0	19:55:24	0
2852717	99	23	16,4	cyclictest	3028698	-21	ntpq	21:55:22	0
2852727	99	22	18,3	cyclictest	2899107	-21	kworker/u8:3+flush-259:0	20:50:21	3
2852720	99	22	18,3	cyclictest	2858082	-21	apt-get	19:15:10	1
2852717	99	22	19,2	cyclictest	3086285	-21	kworker/u8:1+events_unbound	23:00:14	0
2852717	99	22	18,3	cyclictest	3040074	-21	kworker/u8:4+flush-259:0	22:15:00	0
2852727	99	21	17,2	cyclictest	0	-21	swapper/3	21:10:00	3
2852723	99	21	18,2	cyclictest	2924933	-21	kworker/u8:1+flush-259:0	20:35:00	2
2852723	99	21	15,4	cyclictest	3060469	-21	latency_hist	22:30:01	2
2852723	99	21	15,4	cyclictest	3050170	-21	latency_hist	22:20:00	2
2852720	99	21	18,2	cyclictest	3013586	-21	basename	21:45:00	1
2852720	99	21	15,4	cyclictest	3112632	-21	latency_hist	23:25:00	1
2852720	99	21	15,4	cyclictest	252	-21	systemd-journal	21:02:10	1
2852720	99	21	13,6	cyclictest	3163720	-21	ntpq	00:10:20	1
2852717	99	21	19,2	cyclictest	2899107	-21	kworker/u8:3+events_unbound	20:30:24	0
2852717	99	21	17,3	cyclictest	2883629	-21	kworker/u8:0+events_unbound	20:48:10	0
2852723	99	20	16,3	cyclictest	3030765	-21	kworker/u8:3+events_unbound	22:20:24	2
2852720	99	20	17,2	cyclictest	3096568	-21	turbostat.cron	23:05:00	1
2852720	99	20	15,4	cyclictest	3018370	-21	kworker/u8:1+flush-259:0	22:00:15	1
2852720	99	20	15,4	cyclictest	2899107	-21	kworker/u8:3+flush-259:0	20:30:16	1
2852717	99	20	17,2	cyclictest	3159643	-21	kworker/u8:1+flush-259:0	00:15:18	0
2852717	99	20	16,3	cyclictest	3030765	-21	kworker/u8:3+events_unbound	22:20:09	0
2852727	99	19	15,3	cyclictest	2924933	-21	kworker/u8:1+events_unbound	20:55:23	3
2852720	99	19	16,2	cyclictest	3117752	-21	idleruntime-cro	23:30:00	1
2852720	99	19	14,4	cyclictest	2883629	-21	kworker/u8:0+flush-259:0	20:40:17	1
2852717	99	19	16,2	cyclictest	2997198	-21	kworker/u8:4+events_unbound	21:45:17	0
2852717	99	19	13,4	cyclictest	252	-21	systemd-journal	23:34:59	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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