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
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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 Thu Jul 16, 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
458871	99	45	41,3	cyclictest	702534	-21	kworker/u8:0+events_unbound	23:34:46	0
458876	99	43	35,5	cyclictest	557579	-21	latency_hist	20:45:00	2
458879	99	40	34,4	cyclictest	797305	-21	latency_hist	00:35:01	3
458879	99	40	34,4	cyclictest	797305	-21	latency_hist	00:35:01	3
458871	99	40	37,2	cyclictest	589163	-21	kworker/u8:2+events_unbound	21:13:28	0
458871	99	40	36,3	cyclictest	761315	-21	/usr/sbin/munin	00:00:14	0
458873	99	39	35,3	cyclictest	335557	-21	systemd-journal	21:18:44	1
458876	99	38	31,5	cyclictest	594532	-21	latency_hist	21:20:02	2
458871	99	37	33,3	cyclictest	702534	-21	kworker/u8:0+events_unbound	23:17:47	0
458871	99	37	33,3	cyclictest	589163	-21	kworker/u8:2+events_unbound	22:49:46	0
458871	99	37	33,3	cyclictest	484324	-21	kworker/u8:0+events_unbound	20:11:44	0
458871	99	36	33,2	cyclictest	589163	-21	kworker/u8:2+events_unbound	21:50:23	0
458871	99	36	33,2	cyclictest	484324	-21	kworker/u8:0+events_unbound	20:25:56	0
458871	99	35	32,2	cyclictest	484324	-21	kworker/u8:0+events_unbound	20:05:18	0
458871	99	35	31,3	cyclictest	702534	-21	kworker/u8:0+events_unbound	23:06:32	0
458871	99	35	31,3	cyclictest	687684	-21	kworker/u8:3+events_unbound	23:01:29	0
458879	99	34	28,4	cyclictest	630696	-21	latency_hist	21:55:00	3
458871	99	34	31,2	cyclictest	75	-21	kswapd0	19:40:03	0
458871	99	34	31,2	cyclictest	687684	-21	kworker/u8:3+events_unbound	23:10:15	0
458871	99	34	31,2	cyclictest	625159	-21	kworker/u8:3+events_unbound	21:49:44	0
458871	99	34	30,3	cyclictest	589163	-21	kworker/u8:2+events_unbound	22:07:46	0
458873	99	33	28,3	cyclictest	599702	-21	latency_hist	21:25:00	1
458871	99	33	30,2	cyclictest	725058	-21	kworker/u8:3+events_unbound	23:35:23	0
458871	99	33	30,2	cyclictest	640685	-21	kworker/u8:0+events_unbound	22:03:45	0
458871	99	33	30,2	cyclictest	484324	-21	kworker/u8:0+events_unbound	21:06:44	0
458871	99	33	29,3	cyclictest	438665	-21	kworker/u8:4+events_unbound	19:18:43	0
458879	99	32	29,2	cyclictest	719025	-21	kworker/u8:1+flush-259:0	00:10:00	3
458873	99	32	28,3	cyclictest	469429	-21	apt-get	19:20:11	1
458873	99	32	28,3	cyclictest	335557	-21	systemd-journal	23:55:45	1
458873	99	32	26,4	cyclictest	718834	-21	latency_hist	23:20:01	1
458871	99	32	29,2	cyclictest	750377	-21	kworker/u8:0+events_unbound	00:22:56	0
458871	99	32	29,2	cyclictest	589163	-21	kworker/u8:2+events_unbound	22:55:24	0
458871	99	32	29,2	cyclictest	589163	-21	kworker/u8:2+events_unbound	22:11:19	0
458871	99	32	29,2	cyclictest	589163	-21	kworker/u8:2+events_unbound	22:11:19	0
458871	99	32	28,3	cyclictest	734761	-21	kworker/u8:2+events_unbound	23:45:45	0
458871	99	31	28,2	cyclictest	725058	-21	kworker/u8:3+events_unbound	23:52:21	0
458871	99	31	28,2	cyclictest	505814	-21	kworker/u8:1+events_unbound	20:35:19	0
458871	99	31	28,2	cyclictest	505814	-21	kworker/u8:1+events_unbound	20:15:24	0
458871	99	31	28,2	cyclictest	416426	-21	kworker/u8:2+events_unbound	19:45:23	0
458871	99	31	27,3	cyclictest	589163	-21	kworker/u8:2+events_unbound	22:53:46	0
458871	99	31	24,5	cyclictest	723499	-21	ntpq	23:20:21	0
458879	99	30	24,4	cyclictest	656451	-21	latency_hist	22:20:00	3
458871	99	30	27,3	cyclictest	438665	-21	kworker/u8:4+events_unbound	19:10:45	0
458871	99	30	27,2	cyclictest	505814	-21	kworker/u8:1+events_unbound	20:55:13	0
458871	99	30	27,2	cyclictest	484324	-21	kworker/u8:0+events_unbound	20:52:45	0
458871	99	30	27,2	cyclictest	484324	-21	kworker/u8:0+events_unbound	20:40:20	0
458871	99	30	26,3	cyclictest	766234	-21	kworker/u8:2+events_unbound	00:32:14	0
458871	99	30	26,3	cyclictest	766234	-21	kworker/u8:2+events_unbound	00:32:14	0
458871	99	29	27,2	cyclictest	750377	-21	kworker/u8:0+events_unbound	00:15:24	0
458871	99	29	26,2	cyclictest	505814	-21	kworker/u8:1+events_unbound	21:00:12	0
458871	99	29	26,2	cyclictest	505814	-21	kworker/u8:1+events_unbound	20:30:15	0
458871	99	29	25,3	cyclictest	589163	-21	kworker/u8:2+events_unbound	21:31:11	0
458876	99	28	23,3	cyclictest	725058	-21	kworker/u8:3+flush-259:0	23:50:15	2
458873	99	28	22,4	cyclictest	708502	-21	latency_hist	23:10:00	1
458871	99	28	25,3	cyclictest	640685	-21	kworker/u8:0+events_unbound	22:30:16	0
458871	99	28	24,3	cyclictest	750377	-21	kworker/u8:0+events_unbound	00:05:27	0
458871	99	28	24,3	cyclictest	615451	-21	apt-get	21:40:13	0
458879	99	27	21,4	cyclictest	335557	-21	systemd-journal	19:47:44	3
458876	99	27	22,3	cyclictest	589163	-21	kworker/u8:2+flush-259:0	22:25:01	2
458876	99	27	20,5	cyclictest	335557	-21	systemd-journal	21:30:00	2
458873	99	27	24,2	cyclictest	573971	-21	base64	21:00:02	1
458871	99	27	25,1	cyclictest	1	-21	systemd	19:24:43	0
458871	99	27	24,2	cyclictest	484324	-21	kworker/u8:0+events_unbound	20:20:56	0
458871	99	27	24,2	cyclictest	484324	-21	kworker/u8:0+events_unbound	20:00:54	0
458871	99	27	24,2	cyclictest	484324	-21	kworker/u8:0+events_unbound	20:00:53	0
458871	99	27	23,3	cyclictest	640685	-21	kworker/u8:0+events_unbound	22:35:20	0
458871	99	27	23,3	cyclictest	505814	-21	kworker/u8:1+events_unbound	21:37:45	0
458876	99	26	20,4	cyclictest	557601	-21	kworker/u8:2+flush-259:0	20:50:15	2
458873	99	26	22,3	cyclictest	739941	-21	gpgv	23:40:01	1
458871	99	25	22,2	cyclictest	416426	-21	kworker/u8:2+events_unbound	19:30:22	0
458871	99	25	19,4	cyclictest	594793	-21	apt-get	21:20:12	0
458879	99	24	20,3	cyclictest	416426	-21	kworker/u8:2+flush-259:0	19:30:00	3
458879	99	24	19,3	cyclictest	479806	-21	apt-get	19:30:12	3
458876	99	24	20,3	cyclictest	438665	-21	kworker/u8:4+flush-259:0	19:50:01	2
458871	99	24	22,2	cyclictest	589163	-21	kworker/u8:2+events_unbound	22:40:25	0
458871	99	24	21,2	cyclictest	416426	-21	kworker/u8:2+events_unbound	19:26:45	0
458879	99	23	19,3	cyclictest	335557	-21	systemd-journal	00:30:00	3
458876	99	23	19,3	cyclictest	687684	-21	kworker/u8:3+flush-259:0	22:50:23	2
458876	99	23	19,3	cyclictest	589163	-21	kworker/u8:2+flush-259:0	22:40:20	2
458876	99	23	17,4	cyclictest	734761	-21	kworker/u8:2+events_unbound	23:45:20	2
458873	99	23	19,3	cyclictest	745773	-21	apt-get	23:45:10	1
458873	99	23	19,3	cyclictest	605145	-21	apt-get	21:30:11	1
458873	99	23	19,3	cyclictest	335557	-21	systemd-journal	19:45:01	1
458873	99	23	18,4	cyclictest	724617	-21	/usr/sbin/munin	23:25:20	1
458873	99	23	18,4	cyclictest	661820	-21	/usr/sbin/munin	22:25:13	1
458873	99	23	16,5	cyclictest	792115	-21	latency_hist	00:30:00	1
458871	99	23	21,2	cyclictest	640685	-21	kworker/u8:0+events_unbound	22:15:11	0
458871	99	23	16,6	cyclictest	660670	-21	ntpq	22:20:19	0
458879	99	22	17,4	cyclictest	687684	-21	kworker/u8:3+flush-259:0	22:55:15	3
458876	99	22	19,2	cyclictest	438665	-21	kworker/u8:4+events_unbound	19:15:18	2
458876	99	22	19,2	cyclictest	335557	-21	systemd-journal	23:10:00	2
458876	99	22	18,3	cyclictest	640685	-21	kworker/u8:0+flush-259:0	22:15:15	2
458876	99	22	15,5	cyclictest	766234	-21	kworker/u8:2+flush-259:0	00:20:18	2
458873	99	22	17,4	cyclictest	589163	-21	kworker/u8:2+flush-259:0	22:30:25	1
458871	99	22	19,2	cyclictest	750377	-21	kworker/u8:0+events_unbound	00:29:55	0
458871	99	22	19,2	cyclictest	505814	-21	kworker/u8:1+events_unbound	21:25:28	0
458871	99	22	19,2	cyclictest	484324	-21	kworker/u8:0+events_unbound	20:47:46	0
458871	99	22	17,4	cyclictest	335557	-21	systemd-journal	00:00:00	0
458879	99	21	16,3	cyclictest	573458	-21	apt-get	21:00:00	3
458876	99	21	18,2	cyclictest	750377	-21	kworker/u8:0+flush-259:0	00:15:23	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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