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 Sun Jan 11, 2026 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
85306	99	41	35,4	cyclictest	153268	-21	latency_hist	20:15:01	3
85303	99	40	37,2	cyclictest	215588	-21	kworker/u8:2+flush-259:0	21:15:22	2
85303	99	36	32,3	cyclictest	183996	-21	kworker/u8:3+flush-259:0	20:50:21	2
85306	99	33	27,4	cyclictest	298248	-21	ntpq	22:30:20	3
85303	99	32	29,2	cyclictest	64830	-21	kworker/u8:4+flush-259:0	19:45:22	2
85300	99	32	26,4	cyclictest	303474	-21	ntpq	22:35:28	1
85303	99	31	28,2	cyclictest	315155	-21	kworker/u8:2+flush-259:0	23:10:13	2
85303	99	31	27,3	cyclictest	341175	-21	kworker/u8:3+flush-259:0	23:30:19	2
85303	99	31	27,3	cyclictest	220928	-21	kworker/u8:0+flush-259:0	22:35:29	2
85303	99	31	26,3	cyclictest	220928	-21	kworker/u8:0+events_unbound	22:00:21	2
85295	99	30	23,5	cyclictest	95645	-21	latency_hist	19:20:01	0
85303	99	29	26,2	cyclictest	361608	-21	kworker/u8:0+flush-259:0	23:45:21	2
85303	99	29	25,3	cyclictest	367002	-21	kworker/u8:4+flush-259:0	00:05:19	2
85303	99	29	25,3	cyclictest	204788	-21	kworker/u8:2+flush-259:0	21:05:21	2
85303	99	29	25,3	cyclictest	189533	-21	kworker/u8:4+flush-259:0	21:00:22	2
85300	99	29	25,3	cyclictest	418796	-21	kworker/u8:0+events_unbound	00:35:14	1
85300	99	29	24,4	cyclictest	382628	-21	kworker/u8:0+events_unbound	23:55:13	1
85303	99	28	25,2	cyclictest	64830	-21	kworker/u8:4+events_unbound	20:10:21	2
85303	99	28	24,3	cyclictest	158361	-21	kworker/u8:3+flush-259:0	20:25:15	2
85300	99	28	24,3	cyclictest	361822	-21	/usr/sbin/munin	23:35:13	1
85303	99	27	23,3	cyclictest	361608	-21	kworker/u8:0+events_unbound	23:35:21	2
85300	99	27	23,3	cyclictest	341175	-21	kworker/u8:3+flush-259:0	23:20:16	1
85300	99	26	21,3	cyclictest	220928	-21	kworker/u8:0+flush-259:0	22:25:22	1
85300	99	26	20,4	cyclictest	116387	-21	cp	19:40:00	1
85300	99	26	19,5	cyclictest	252	-21	systemd-journal	00:20:01	1
85306	99	25	21,3	cyclictest	355808	-21	kworker/u8:1+flush-259:0	00:00:18	3
85303	99	25	22,2	cyclictest	326004	-21	kworker/u8:0+events_unbound	23:25:11	2
85303	99	25	21,3	cyclictest	189529	-21	kworker/u8:1+events_unbound	21:20:16	2
85303	99	25	21,3	cyclictest	173613	-21	kworker/u8:0+events_unbound	20:35:18	2
85303	99	25	20,4	cyclictest	64830	-21	kworker/u8:4+events_unbound	19:15:13	2
85303	99	25	19,4	cyclictest	299177	-21	latency_hist	22:35:01	2
85306	99	24	19,4	cyclictest	147170	-21	ntpq	20:05:20	3
85303	99	24	21,2	cyclictest	64830	-21	kworker/u8:4+flush-259:0	19:40:22	2
85306	99	23	19,3	cyclictest	397450	-21	kworker/u8:3+flush-259:0	00:30:00	3
85306	99	23	19,3	cyclictest	204788	-21	kworker/u8:2+flush-259:0	21:05:22	3
85303	99	23	20,2	cyclictest	64830	-21	kworker/u8:4+flush-259:0	19:30:15	2
85303	99	23	20,2	cyclictest	377434	-21	kworker/u8:2+events_unbound	23:50:24	2
85303	99	23	19,3	cyclictest	241035	-21	kworker/u8:3+flush-259:0	21:45:21	2
85300	99	23	19,3	cyclictest	121556	-21	kworker/u8:0+flush-259:0	19:45:14	1
85306	99	22	18,3	cyclictest	356687	-21	apt-get	23:30:11	3
85306	99	22	16,4	cyclictest	252	-21	systemd-journal	20:00:01	3
85303	99	22	18,3	cyclictest	267770	-21	kworker/u8:1+events_unbound	22:07:22	2
85303	99	22	18,3	cyclictest	121583	-21	kworker/u8:3+events_unbound	20:02:21	2
85300	99	22	18,3	cyclictest	507	-21	in:imuxsock	20:10:01	1
85300	99	22	18,3	cyclictest	361608	-21	kworker/u8:0+flush-259:0	23:40:16	1
85300	99	22	17,4	cyclictest	382628	-21	kworker/u8:0+flush-259:0	23:55:01	1
85295	99	22	17,3	cyclictest	236395	-21	apt-get	21:35:00	0
85295	99	22	16,4	cyclictest	509	-21	rs:main		0
85303	99	21	18,3	cyclictest	80019	-21	kworker/u8:0+flush-259:0	19:10:22	2
85303	99	21	18,2	cyclictest	147860	-21	kworker/u8:2+events_unbound	20:40:21	2
85303	99	21	17,3	cyclictest	147860	-21	kworker/u8:2+events_unbound	20:20:21	2
85300	99	21	16,3	cyclictest	509	-21	rs:main		1
85300	99	21	16,3	cyclictest	252	-21	systemd-journal	21:26:22	1
85300	99	21	14,5	cyclictest	509	-21	rs:main		1
85306	99	20	17,2	cyclictest	2971	-21	cron	22:30:01	3
85303	99	20	17,2	cyclictest	241035	-21	kworker/u8:3+flush-259:0	22:15:22	2
85303	99	20	17,1	cyclictest	0	-21	swapper/2	00:25:01	2
85303	99	20	15,3	cyclictest	252	-21	systemd-journal	20:58:21	2
85300	99	20	17,2	cyclictest	413698	-21	systemd-run	00:25:01	1
85300	99	20	16,3	cyclictest	397450	-21	kworker/u8:3+events_unbound	00:10:20	1
85300	99	20	16,3	cyclictest	299199	-21	kworker/u8:4+events_unbound	22:40:14	1
85295	99	20	17,2	cyclictest	138047	-21	apt-get	20:00:12	0
85306	99	19	17,1	cyclictest	0	-21	swapper/3	23:19:59	3
85306	99	19	15,3	cyclictest	367002	-21	kworker/u8:4+flush-259:0	23:45:00	3
85306	99	19	12,5	cyclictest	252	-21	systemd-journal	23:15:00	3
85303	99	19	16,2	cyclictest	326004	-21	kworker/u8:0+flush-259:0	23:15:24	2
85303	99	19	16,2	cyclictest	220928	-21	kworker/u8:0+events_unbound	22:45:10	2
85303	99	19	16,2	cyclictest	153104	-21	kworker/u8:0+flush-259:0	20:17:15	2
85303	99	19	15,3	cyclictest	367002	-21	kworker/u8:4+flush-259:0	00:15:19	2
85303	99	19	15,3	cyclictest	215588	-21	kworker/u8:2+events_unbound	21:35:13	2
85303	99	19	13,4	cyclictest	429082	-21	latency_hist	00:40:01	2
85300	99	19	16,2	cyclictest	335644	-21	kworker/u8:1+flush-259:0	23:10:26	1
85300	99	19	16,2	cyclictest	236659	-21	latency_hist	21:35:01	1
85300	99	19	15,3	cyclictest	408235	-21	kworker/u8:1+flush-259:0	00:30:21	1
85300	99	19	15,3	cyclictest	267770	-21	kworker/u8:1+events_unbound	22:20:19	1
85300	99	19	14,3	cyclictest	393010	-21	latency_hist	00:05:01	1
85300	99	19	14,3	cyclictest	153191	-21	kworker/u8:1+flush-259:0	20:20:14	1
85300	99	19	14,3	cyclictest	153104	-21	kworker/u8:0+events_unbound	20:15:19	1
85300	99	19	12,5	cyclictest	257449	-21	latency_hist	21:55:00	1
85306	99	18	15,2	cyclictest	263271	-21	irqcore	22:00:17	3
85306	99	18	15,2	cyclictest	226071	-21	idleruntime-cro	21:25:01	3
85306	99	18	15,2	cyclictest	210414	-21	kworker/u8:3+flush-259:0	21:10:20	3
85306	99	18	14,3	cyclictest	326004	-21	kworker/u8:0+flush-259:0	23:05:23	3
85303	99	18	16,1	cyclictest	341175	-21	kworker/u8:3+flush-259:0	23:20:23	2
85303	99	18	15,2	cyclictest	367002	-21	kworker/u8:4+flush-259:0	23:57:49	2
85303	99	18	15,2	cyclictest	309323	-21	kworker/u8:3+events_unbound	22:50:18	2
85303	99	18	14,3	cyclictest	299199	-21	kworker/u8:4+events_unbound	22:40:19	2
85303	99	18	14,3	cyclictest	2213501	-21	kworker/u8:1+events_unbound	19:37:19	2
85303	99	18	14,3	cyclictest	189529	-21	kworker/u8:1+events_unbound	21:13:21	2
85303	99	18	14,2	cyclictest	252	-21	systemd-journal	23:04:59	2
85300	99	18	14,3	cyclictest	220928	-21	kworker/u8:0+events_unbound	22:20:00	1
85300	99	18	14,3	cyclictest	189533	-21	kworker/u8:4+flush-259:0	21:00:26	1
85300	99	18	12,5	cyclictest	324569	-21	ntpq	22:55:20	1
85295	99	18	13,3	cyclictest	603	50	irq/132-enp0s29f1:rx-0	23:55:21	0
85306	99	17	14,2	cyclictest	404037	-21	irqcore	00:15:16	3
85306	99	17	14,2	cyclictest	367002	-21	kworker/u8:4+events_unbound	00:00:01	3
85306	99	17	13,3	cyclictest	189529	-21	kworker/u8:1+flush-259:0	21:00:15	3
85306	99	17	12,4	cyclictest	262587	-21	latency_hist	22:00:00	3
85306	99	17	11,4	cyclictest	194683	-21	awk	20:55:00	3
85303	99	17	14,2	cyclictest	267770	-21	kworker/u8:1+events_unbound	22:20:20	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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