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 Sun Jun 14, 2026 12:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2498556	99	46	40,4	cyclictest	2561074	-21	cp	08:10:01	1
2498554	99	45	40,3	cyclictest	509	-21	rs:main		0
2498559	99	43	35,5	cyclictest	2545355	-21	latency_hist	07:55:01	2
2498554	99	42	39,2	cyclictest	2675170	-21	kworker/u8:0+flush-259:0	11:00:00	0
2498554	99	41	37,3	cyclictest	2618008	-21	kworker/u8:1+events_unbound	09:20:17	0
2498554	99	40	35,4	cyclictest	2841458	-21	ntpq	12:35:20	0
2498554	99	37	32,4	cyclictest	2694895	-21	ntpq	10:15:21	0
2498554	99	36	33,2	cyclictest	2561451	-21	gpgv	08:10:01	0
2498554	99	36	30,4	cyclictest	2717316	-21	diskstats	10:40:14	0
2498554	99	35	31,3	cyclictest	2753520	-21	kworker/u8:1+flush-259:0	11:15:14	0
2498554	99	35	29,4	cyclictest	2586256	-21	ntpq	08:30:23	0
2498554	99	35	29,3	cyclictest	2700934	-21	kworker/u8:3+flush-259:0	10:55:00	0
2498554	99	35	28,5	cyclictest	2540197	-21	latency_hist	07:50:01	0
2498559	99	34	28,4	cyclictest	2623144	-21	apt-get	09:10:00	2
2498556	99	34	29,3	cyclictest	2827108	-21	/usr/sbin/munin	12:25:13	1
2498564	99	33	27,4	cyclictest	2747759	-21	ntpq	11:05:21	3
2498559	99	33	27,4	cyclictest	2727772	-21	cat	10:50:01	2
2498556	99	32	29,2	cyclictest	2764922	-21	kworker/u8:4+flush-259:0	11:35:26	1
2498556	99	32	28,3	cyclictest	2571900	-21	apt-get	08:20:12	1
2498556	99	32	27,4	cyclictest	2617101	-21	ntpq	09:00:20	1
2498554	99	32	29,2	cyclictest	2545619	-21	apt-get	07:55:12	0
2498554	99	32	27,3	cyclictest	1	-21	systemd	09:45:00	0
2498554	99	32	25,5	cyclictest	2592646	-21	diskstats	08:40:13	0
2498556	99	31	28,2	cyclictest	2561541	-21	kworker/u8:4+flush-259:0	09:30:15	1
2498556	99	31	25,4	cyclictest	2514223	-21	/usr/sbin/munin	07:25:14	1
2498554	99	31	24,5	cyclictest	2670008	-21	latency_hist	09:55:00	0
2498564	99	30	24,4	cyclictest	2545594	-21	/usr/sbin/munin	07:55:15	3
2498556	99	30	24,4	cyclictest	2785831	-21	/usr/sbin/munin	11:45:15	1
2498554	99	30	23,5	cyclictest	2764036	-21	ntpq	11:20:21	0
2498556	99	29	25,3	cyclictest	2649480	-21	/usr/sbin/munin	09:35:14	1
2498556	99	29	24,4	cyclictest	2659850	-21	/usr/sbin/munin	09:45:14	1
2498559	99	28	24,3	cyclictest	2690793	-21	kworker/u8:2+flush-259:0	11:10:01	2
2498559	99	28	22,4	cyclictest	2801063	-21	latency_hist	12:00:00	2
2498554	99	28	23,4	cyclictest	2727264	-21	gpgv	10:50:00	0
2498554	99	28	22,4	cyclictest	2769242	-21	ntpq	11:25:21	0
2498554	99	28	22,4	cyclictest	2623138	-21	latency_hist	09:10:00	0
2498554	99	28	21,5	cyclictest	335557	-21	systemd-journal	09:15:00	0
2498559	99	27	20,5	cyclictest	2555680	-21	latency_hist	08:05:01	2
2498564	99	26	22,3	cyclictest	2700934	-21	kworker/u8:3+events_unbound	10:50:17	3
2498564	99	26	22,3	cyclictest	2618008	-21	kworker/u8:1+events_unbound	09:20:23	3
2498556	99	26	22,3	cyclictest	2597362	-21	kworker/u8:2+flush-259:0	09:15:25	1
2498556	99	26	21,3	cyclictest	2524314	-21	apt-get	07:35:00	1
2498556	99	26	19,5	cyclictest	2659610	-21	latency_hist	09:45:00	1
2498554	99	26	21,3	cyclictest	2811625	-21	apt-get	12:10:11	0
2498554	99	26	21,3	cyclictest	2523373	-21	kworker/u8:4+flush-259:0	07:30:25	0
2498554	99	26	19,5	cyclictest	2810444	-21	ntpq	12:05:20	0
2498564	99	25	21,3	cyclictest	335557	-21	systemd-journal	09:55:00	3
2498564	99	25	19,4	cyclictest	2727464	-21	cat	10:50:01	3
2498559	99	25	21,2	cyclictest	2765170	-21	apt-get	11:25:11	2
2498556	99	25	22,2	cyclictest	2753520	-21	kworker/u8:1+events_unbound	11:15:19	1
2498556	99	25	22,2	cyclictest	2540078	-21	kworker/u8:3+flush-259:0	07:55:17	1
2498556	99	25	21,3	cyclictest	2576799	-21	kworker/u8:1+flush-259:0	08:30:26	1
2498554	99	25	20,3	cyclictest	2561541	-21	kworker/u8:4+flush-259:0	08:15:16	0
2498554	99	25	19,4	cyclictest	2632964	-21	ntpq	09:15:22	0
2498564	99	24	20,3	cyclictest	2801081	-21	kworker/u8:1+flush-259:0	12:10:00	3
2498564	99	24	20,3	cyclictest	2493402	-21	kworker/u8:1+flush-259:0	07:50:16	3
2498564	99	24	18,4	cyclictest	2561541	-21	kworker/u8:4+flush-259:0	08:20:16	3
2498559	99	24	18,4	cyclictest	335557	-21	systemd-journal	09:52:34	2
2498556	99	24	20,3	cyclictest	2561574	-21	apt-get	08:10:11	1
2498556	99	24	18,4	cyclictest	335557	-21	systemd-journal	08:30:00	1
2498554	99	24	21,2	cyclictest	2618008	-21	kworker/u8:1+events_unbound	09:49:56	0
2498554	99	24	20,3	cyclictest	2460994	-21	kworker/u8:2+events_unbound	07:15:23	0
2498564	99	23	19,3	cyclictest	2675170	-21	kworker/u8:0+events_unbound	11:50:23	3
2498564	99	23	18,4	cyclictest	335557	-21	systemd-journal	09:04:41	3
2498564	99	23	18,4	cyclictest	2675170	-21	kworker/u8:0+events_unbound	11:25:18	3
2498564	99	23	17,4	cyclictest	2701179	-21	apt-get	10:25:14	3
2498564	99	23	16,5	cyclictest	2742542	-21	ntpq	11:00:19	3
2498559	99	23	20,2	cyclictest	2690793	-21	kworker/u8:2+flush-259:0	10:40:00	2
2498559	99	23	19,3	cyclictest	2659240	-21	kworker/u8:3+flush-259:0	09:45:00	2
2498559	99	23	18,4	cyclictest	335557	-21	systemd-journal	08:00:01	2
2498556	99	23	20,2	cyclictest	2460994	-21	kworker/u8:2+flush-259:0	07:15:17	1
2498556	99	23	19,3	cyclictest	2493402	-21	kworker/u8:1+flush-259:0	07:35:16	1
2498556	99	23	17,4	cyclictest	2503622	-21	latency_hist	07:15:01	1
2498556	99	23	16,5	cyclictest	335557	-21	systemd-journal	11:10:00	1
2498554	99	23	19,3	cyclictest	2770082	-21	kworker/u8:5+flush-259:0	12:00:16	0
2498554	99	23	19,3	cyclictest	2770082	-21	kworker/u8:5+flush-259:0	12:00:00	0
2498554	99	23	19,3	cyclictest	2618008	-21	kworker/u8:1+flush-259:0	09:55:25	0
2498554	99	23	16,5	cyclictest	2550777	-21	/usr/sbin/munin	08:00:15	0
2498554	99	23	15,6	cyclictest	2529040	-21	ntpq	07:35:22	0
2498564	99	22	17,4	cyclictest	2700934	-21	kworker/u8:3+events_unbound	10:30:20	3
2498564	99	22	17,3	cyclictest	2785821	-21	kworker/u8:2+flush-259:0	12:25:15	3
2498564	99	22	17,3	cyclictest	2586574	-21	kworker/u8:0+flush-259:0	08:45:00	3
2498559	99	22	18,3	cyclictest	2785821	-21	kworker/u8:2+flush-259:0	12:20:25	2
2498559	99	22	16,5	cyclictest	335557	-21	systemd-journal	10:50:00	2
2498556	99	22	18,3	cyclictest	2576799	-21	kworker/u8:1+events_unbound	08:35:19	1
2498554	99	22	19,2	cyclictest	2561541	-21	kworker/u8:4+events_unbound	08:50:02	0
2498554	99	22	18,3	cyclictest	2770082	-21	kworker/u8:5+events_unbound	11:45:00	0
2498554	99	22	18,3	cyclictest	2690793	-21	kworker/u8:2+events_unbound	11:12:34	0
2498554	99	22	17,4	cyclictest	2576799	-21	kworker/u8:1+events_unbound	08:27:34	0
2498554	99	22	17,3	cyclictest	2764922	-21	kworker/u8:4+events_unbound	11:30:21	0
2498554	99	22	16,4	cyclictest	2675170	-21	kworker/u8:0+events_unbound	10:10:18	0
2498554	99	22	16,4	cyclictest	2493402	-21	kworker/u8:1+flush-259:0	07:55:00	0
2498564	99	21	16,3	cyclictest	2460994	-21	kworker/u8:2+flush-259:0	07:45:25	3
2498564	99	21	15,4	cyclictest	2695752	-21	latency_hist	10:20:00	3
2498554	99	21	17,3	cyclictest	2555909	-21	kworker/u8:0+events_unbound	08:08:35	0
2498554	99	21	16,4	cyclictest	2826894	-21	kworker/u8:1+events_unbound	12:30:13	0
2498554	99	21	16,3	cyclictest	2587359	-21	apt-get	08:35:12	0
2498564	99	20	17,2	cyclictest	2675170	-21	kworker/u8:0+events_unbound	10:10:25	3
2498564	99	20	17,2	cyclictest	2493402	-21	kworker/u8:1+flush-259:0	07:40:24	3
2498564	99	20	17,2	cyclictest	2493402	-21	kworker/u8:1+flush-259:0	07:40:24	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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