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 Mon Jul 20, 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
746612	99	61	58,2	cyclictest	871497	-21	apt-get	21:10:02	3
746602	99	42	37,3	cyclictest	908441	-21	gpgv	21:45:00	0
746602	99	42	37,3	cyclictest	751762	-21	kworker/u8:0+flush-259:0	20:15:00	0
746612	99	39	36,2	cyclictest	819463	-21	kworker/u8:2+flush-259:0	21:00:19	3
746602	99	39	35,3	cyclictest	950605	-21	kworker/u8:1+flush-259:0	23:05:00	0
746606	99	38	32,4	cyclictest	783439	-21	apt-get	19:45:09	1
746608	99	36	33,2	cyclictest	1043550	-21	kworker/u8:0+flush-259:0	00:05:32	2
746602	99	36	31,3	cyclictest	976649	-21	apt-get	22:50:12	0
746612	99	35	29,4	cyclictest	908774	-21	cp	21:45:00	3
746608	99	34	31,2	cyclictest	1007407	-21	kworker/u8:2+events_unbound	23:20:23	2
746608	99	33	30,2	cyclictest	913861	-21	kworker/u8:2+events_unbound	22:15:24	2
746608	99	33	28,3	cyclictest	898158	-21	latency_hist	21:35:00	2
746608	99	33	27,4	cyclictest	929051	-21	ntpq	22:00:19	2
746608	99	33	27,4	cyclictest	335557	-21	systemd-journal	21:11:41	2
746608	99	32	28,3	cyclictest	335557	-21	systemd-journal	00:32:30	2
746608	99	32	28,3	cyclictest	335557	-21	systemd-journal	00:32:29	2
746606	99	32	27,4	cyclictest	751762	-21	kworker/u8:0+events_unbound	19:45:00	1
746608	99	31	28,2	cyclictest	783202	-21	kworker/u8:3+events_unbound	19:45:20	2
746608	99	31	27,3	cyclictest	793485	-21	kworker/u8:1+events_unbound	20:10:22	2
746608	99	31	25,4	cyclictest	908416	-21	apt-get	21:45:00	2
746606	99	31	25,4	cyclictest	892607	-21	gpgv	21:30:01	1
746612	99	30	25,3	cyclictest	746152	-21	kworker/u8:2+flush-259:0	20:00:21	3
746608	99	30	27,2	cyclictest	950605	-21	kworker/u8:1+events_unbound	23:25:23	2
746608	99	30	27,2	cyclictest	834803	-21	kworker/u8:0+events_unbound	20:35:22	2
746608	99	30	27,2	cyclictest	1007407	-21	kworker/u8:2+events_unbound	23:35:20	2
746608	99	30	26,3	cyclictest	746152	-21	kworker/u8:2+flush-259:0	19:15:26	2
746602	99	30	24,4	cyclictest	1033233	-21	kworker/u8:1+flush-259:0	00:15:17	0
746612	99	29	25,3	cyclictest	1033233	-21	kworker/u8:1+flush-259:0	00:25:20	3
746608	99	29	26,2	cyclictest	834803	-21	kworker/u8:0+flush-259:0	20:45:22	2
746608	99	29	23,4	cyclictest	335557	-21	systemd-journal	19:27:28	2
746606	99	29	25,3	cyclictest	877095	-21	kworker/u8:3+flush-259:0	21:15:22	1
746608	99	28	24,3	cyclictest	746152	-21	kworker/u8:2+events_unbound	19:10:24	2
746606	99	28	25,2	cyclictest	1027906	-21	kworker/u8:3+flush-259:0	23:50:25	1
746612	99	27	23,3	cyclictest	736571	-21	kworker/u8:3+events_unbound	19:12:31	3
746608	99	27	23,3	cyclictest	950605	-21	kworker/u8:1+events_unbound	22:55:30	2
746608	99	27	23,3	cyclictest	877095	-21	kworker/u8:3+events_unbound	21:15:19	2
746608	99	27	22,4	cyclictest	1018017	-21	apt-get	23:30:11	2
746602	99	27	22,3	cyclictest	1	-21	systemd	19:50:00	0
746602	99	27	21,5	cyclictest	802920	-21	ntpq	20:00:19	0
746612	99	26	23,2	cyclictest	834803	-21	kworker/u8:0+events_unbound	20:35:18	3
746612	99	26	23,2	cyclictest	1027906	-21	kworker/u8:3+flush-259:0	00:00:00	3
746612	99	26	22,3	cyclictest	892695	-21	gpgv	21:30:00	3
746608	99	26	23,2	cyclictest	950605	-21	kworker/u8:1+flush-259:0	22:40:16	2
746608	99	26	23,2	cyclictest	1027906	-21	kworker/u8:3+flush-259:0	23:55:18	2
746606	99	26	19,5	cyclictest	509	-21	rs:main		1
746606	99	26	19,5	cyclictest	335557	-21	systemd-journal	21:34:59	1
746612	99	25	22,2	cyclictest	950605	-21	kworker/u8:1+flush-259:0	23:30:16	3
746612	99	25	20,3	cyclictest	804318	-21	diskstats	20:05:19	3
746608	99	25	22,2	cyclictest	886895	-21	kworker/u8:1+events_unbound	21:40:14	2
746608	99	25	22,2	cyclictest	886895	-21	kworker/u8:1+events_unbound	21:30:00	2
746608	99	25	22,2	cyclictest	1048704	-21	kworker/u8:5+events_unbound	00:38:38	2
746608	99	25	22,2	cyclictest	1048704	-21	kworker/u8:5+events_unbound	00:38:37	2
746608	99	25	22,2	cyclictest	1033233	-21	kworker/u8:1+flush-259:0	00:25:23	2
746608	99	25	22,2	cyclictest	1027906	-21	kworker/u8:3+flush-259:0	23:40:19	2
746608	99	25	20,4	cyclictest	844793	-21	ntpq	20:40:20	2
746606	99	25	20,3	cyclictest	1075236	-21	/usr/sbin/munin	00:25:12	1
746606	99	25	18,5	cyclictest	913121	-21	ntpq	21:45:21	1
746602	99	25	19,4	cyclictest	335557	-21	systemd-journal	19:14:59	0
746602	99	25	19,4	cyclictest	335557	-21	systemd-journal	00:35:00	0
746602	99	25	19,4	cyclictest	335557	-21	systemd-journal	00:34:59	0
746612	99	24	21,2	cyclictest	950605	-21	kworker/u8:1+events_unbound	23:21:29	3
746612	99	24	21,2	cyclictest	1048704	-21	kworker/u8:5+events_unbound	00:08:24	3
746612	99	24	20,3	cyclictest	950605	-21	kworker/u8:1+events_unbound	23:05:13	3
746612	99	24	20,3	cyclictest	1048704	-21	kworker/u8:5+events_unbound	00:15:20	3
746612	99	24	19,3	cyclictest	877095	-21	kworker/u8:3+events_unbound	21:15:24	3
746608	99	24	21,2	cyclictest	950605	-21	kworker/u8:1+flush-259:0	22:25:25	2
746608	99	24	21,2	cyclictest	877095	-21	kworker/u8:3+flush-259:0	22:35:19	2
746608	99	24	20,3	cyclictest	746152	-21	kworker/u8:2+events_unbound	19:30:15	2
746608	99	24	19,4	cyclictest	751762	-21	kworker/u8:0+events_unbound	20:15:13	2
746608	99	24	18,2	cyclictest	1033233	-21	kworker/u8:1+events_unbound	00:10:18	2
746608	99	24	17,5	cyclictest	866307	-21	latency_hist	21:05:01	2
746602	99	24	19,3	cyclictest	919433	-21	apt-get	21:55:13	0
746602	99	24	19,3	cyclictest	919433	-21	apt-get	21:55:13	0
746612	99	23	19,3	cyclictest	746152	-21	kworker/u8:2+events_unbound	19:26:15	3
746612	99	23	17,4	cyclictest	1007384	-21	latency_hist	23:20:01	3
746608	99	23	20,3	cyclictest	950605	-21	kworker/u8:1+events_unbound	23:05:29	2
746608	99	23	20,2	cyclictest	866538	-21	kworker/u8:1+events_unbound	21:05:18	2
746606	99	23	19,3	cyclictest	866538	-21	kworker/u8:1+events_unbound	21:10:01	1
746606	99	23	19,2	cyclictest	0	-21	swapper/1	20:35:00	1
746606	99	23	17,5	cyclictest	819463	-21	kworker/u8:2+flush-259:0	20:55:17	1
746606	99	23	17,4	cyclictest	1023147	-21	apt-get	23:35:12	1
746602	99	23	20,2	cyclictest	751762	-21	kworker/u8:0+flush-259:0	19:25:00	0
746602	99	23	17,4	cyclictest	950605	-21	kworker/u8:1+flush-259:0	23:25:01	0
746612	99	22	19,2	cyclictest	751762	-21	kworker/u8:0+flush-259:0	20:15:26	3
746612	99	22	18,3	cyclictest	746152	-21	kworker/u8:2+events_unbound	19:55:29	3
746612	99	22	18,3	cyclictest	746152	-21	kworker/u8:2+events_unbound	19:16:37	3
746612	99	22	16,4	cyclictest	966514	-21	diskstats	22:40:14	3
746608	99	22	18,3	cyclictest	950605	-21	kworker/u8:1+flush-259:0	22:30:20	2
746608	99	22	18,3	cyclictest	950605	-21	kworker/u8:1+events_unbound	23:00:13	2
746608	99	22	18,3	cyclictest	913861	-21	kworker/u8:2+events_unbound	21:50:22	2
746608	99	22	18,3	cyclictest	819463	-21	kworker/u8:2+events_unbound	20:30:24	2
746608	99	22	18,3	cyclictest	1007407	-21	kworker/u8:2+events_unbound	23:45:20	2
746606	99	22	17,3	cyclictest	945668	-21	/usr/sbin/munin	22:20:14	1
746612	99	21	18,2	cyclictest	997092	-21	kworker/u8:3+events_unbound	23:11:55	3
746612	99	21	18,2	cyclictest	877095	-21	kworker/u8:3+flush-259:0	22:20:25	3
746608	99	21	18,2	cyclictest	746152	-21	kworker/u8:2+flush-259:0	19:50:24	2
746608	99	21	17,3	cyclictest	1048704	-21	kworker/u8:5+flush-259:0	00:00:20	2
746608	99	21	16,3	cyclictest	877095	-21	kworker/u8:3+events_unbound	21:20:28	2
746608	99	21	15,4	cyclictest	1069822	-21	latency_hist	00:20:00	2
746608	99	21	13,5	cyclictest	809110	-21	latency_hist	20:10:01	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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