OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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, lowest P state: ondemand
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack5slot4s.osadl.org (updated Sun Jun 14, 2026 00:44:15)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2558900	2	113	0,2	chrt	75	-21	kworker/3:1-events	21:50:31	3
2486930	2	88	0,3	sleep3	75	-21	kworker/3:1+events	20:35:36	3
2397529	99	71	66,4	cyclictest	2543074	-21	kworker/u8:1+events_unbound	21:45:42	1
2397529	99	70	63,5	cyclictest	2275183	-21	kworker/u8:2+flush-8:0	20:00:42	1
2397524	99	68	58,7	cyclictest	2459245	-21	diskstats	20:10:31	0
2397524	99	68	50,15	cyclictest	2583017	-21	apt-get	22:15:24	0
2397524	99	68	49,17	cyclictest	2543533	-21	apt-get	21:35:25	0
2397529	99	66	60,4	cyclictest	2533076	-21	kworker/u8:2+events_unbound	23:05:28	1
2397529	99	66	59,6	cyclictest	2533076	-21	kworker/u8:2+events_unbound	22:15:26	1
2397529	99	66	59,6	cyclictest	2275183	-21	kworker/u8:2+events_unbound	19:10:43	1
2397529	99	66	59,5	cyclictest	2603064	-21	kworker/u8:0+flush-8:0	23:20:40	1
2397529	99	66	59,5	cyclictest	2478155	-21	kworker/u8:1+events_unbound	20:45:30	1
2397529	99	65	59,4	cyclictest	2355418	-21	kworker/u8:0+flush-8:0	21:50:45	1
2397529	99	65	58,4	cyclictest	2687141	-21	kworker/u8:2+flush-8:0	00:00:43	1
2397529	99	64	58,5	cyclictest	2275183	-21	kworker/u8:2+flush-8:0	19:15:29	1
2397529	99	64	58,4	cyclictest	2543074	-21	kworker/u8:1+events_unbound	22:05:29	1
2397529	99	64	58,4	cyclictest	2543074	-21	kworker/u8:1+events_unbound	22:05:29	1
2397529	99	63	57,4	cyclictest	2580625	-21	kworker/u8:3+flush-8:0	22:50:46	1
2397529	99	62	58,3	cyclictest	933800	-21	kworker/u8:3+events_unbound	20:20:36	1
2397529	99	62	57,4	cyclictest	2603064	-21	kworker/u8:0+events_unbound	23:50:43	1
2397524	99	62	53,6	cyclictest	2482756	-21	ntpq	20:30:39	0
2397531	99	61	37,20	cyclictest	1704890	-21	systemd-journal	00:25:00	2
2397529	99	61	55,4	cyclictest	2275183	-21	kworker/u8:2+flush-8:0	20:30:47	1
2397529	99	61	51,8	cyclictest	2652600	-21	/usr/sbin/munin	23:25:38	1
2397529	99	60	53,5	cyclictest	933800	-21	kworker/u8:3+flush-8:0	19:45:39	1
2397529	99	60	53,5	cyclictest	933800	-21	kworker/u8:3+flush-8:0	19:45:39	1
2397529	99	60	53,5	cyclictest	2603064	-21	kworker/u8:0+flush-8:0	22:35:41	1
2397529	99	60	53,5	cyclictest	2603064	-21	kworker/u8:0+events_unbound	23:55:29	1
2397529	99	59	52,5	cyclictest	2275183	-21	kworker/u8:2+events_unbound	19:30:41	1
2397529	99	58	54,3	cyclictest	2687141	-21	kworker/u8:2+flush-8:0	00:10:46	1
2397529	99	58	53,4	cyclictest	2533076	-21	kworker/u8:2+flush-8:0	22:20:47	1
2397529	99	58	53,4	cyclictest	2355418	-21	kworker/u8:0+events_unbound	21:05:31	1
2397529	99	58	53,4	cyclictest	2355418	-21	kworker/u8:0+events_unbound	20:55:29	1
2397524	99	58	49,7	cyclictest	2721424	-21	ntpq	00:30:39	0
2397529	99	57	53,3	cyclictest	2275183	-21	kworker/u8:2+events_unbound	20:25:47	1
2397529	99	57	51,4	cyclictest	2687141	-21	kworker/u8:2+events_unbound	00:25:38	1
2397529	99	57	51,4	cyclictest	2687141	-21	kworker/u8:2+events_unbound	00:25:37	1
2664770	2	56	0,2	chrt	0	-21	swapper/0	23:35:34	0
2397529	99	56	48,6	cyclictest	2622285	-21	kworker/u8:1+events_unbound	00:30:41	1
2397529	99	55	51,3	cyclictest	2355418	-21	kworker/u8:0+flush-8:0	19:50:44	1
2397524	99	55	48,5	cyclictest	2707768	-21	apt-get	00:20:26	0
2397524	99	55	42,11	cyclictest	1704890	-21	systemd-journal	20:50:00	0
2397524	99	55	29,9	cyclictest	2447972	-21	ntpq	19:55:43	0
2397529	99	54	50,3	cyclictest	933800	-21	kworker/u8:3+flush-8:0	19:40:45	1
2397529	99	54	47,5	cyclictest	2478155	-21	kworker/u8:1+events_unbound	21:10:43	1
2397524	99	54	46,6	cyclictest	2487743	-21	ntpq	20:35:39	0
2397529	99	53	47,5	cyclictest	2355418	-21	kworker/u8:0+events_unbound	21:55:33	1
2397529	99	53	47,4	cyclictest	2533076	-21	kworker/u8:2+events_unbound	22:30:33	1
2397524	99	53	46,4	cyclictest	2593167	-21	apt-get	22:25:25	0
2519720	2	52	0,1	sleep0	2519726	-21	cut	21:10:36	0
2397529	99	52	48,3	cyclictest	2543074	-21	kworker/u8:1+events_unbound	22:00:45	1
2397529	99	52	48,3	cyclictest	2275183	-21	kworker/u8:2+flush-8:0	19:20:45	1
2397529	99	52	46,4	cyclictest	2603064	-21	kworker/u8:0+events_unbound	23:00:38	1
2397529	99	52	45,6	cyclictest	2543074	-21	kworker/u8:1+flush-8:0	22:25:41	1
2397529	99	52	41,9	cyclictest	1704890	-21	systemd-journal	21:25:01	1
2397529	99	52	41,8	cyclictest	2527544	-21	ntpq	21:15:42	1
2397524	99	52	41,8	cyclictest	2631613	-21	ntpq	23:00:37	0
2397529	99	51	44,5	cyclictest	2533076	-21	kworker/u8:2+flush-8:0	21:40:40	1
2397529	99	51	39,8	cyclictest	2478155	-21	kworker/u8:1+flush-8:0	20:40:42	1
2397529	99	50	44,4	cyclictest	2533076	-21	kworker/u8:2+events_unbound	21:35:41	1
2397524	99	50	44,4	cyclictest	2603061	-21	apt-get	22:35:26	0
2397524	99	50	41,6	cyclictest	2443108	-21	ntpq	19:50:43	0
2397529	99	49	45,3	cyclictest	2603064	-21	kworker/u8:0+flush-8:0	22:55:47	1
2397529	99	49	44,3	cyclictest	2533076	-21	kworker/u8:2+events_unbound	23:15:33	1
2397529	99	49	39,8	cyclictest	2671464	-21	ntpq	23:40:42	1
2397524	99	49	39,8	cyclictest	2571978	-21	ntpq	22:00:40	0
2397524	99	49	25,8	cyclictest	2562071	-21	ntpq	21:50:38	0
2707651	2	48	0,2	sleep3	48	1	ktimers/3	00:20:00	3
2397529	99	48	44,3	cyclictest	2498195	-21	kworker/u8:3+flush-8:0	21:30:30	1
2397529	99	48	41,5	cyclictest	2275183	-21	kworker/u8:2+events_unbound	19:25:40	1
2397524	99	48	38,8	cyclictest	2428218	-21	ntpq	19:35:40	0
2397524	99	48	21,9	cyclictest	2457850	-21	ntpq	20:05:42	0
2397531	99	47	40,4	cyclictest	2687131	-40	logrotate	23:59:59	2
2397529	99	47	43,3	cyclictest	2622285	-21	kworker/u8:1+events_unbound	23:45:27	1
2397529	99	47	42,4	cyclictest	2580625	-21	kworker/u8:3+flush-8:0	22:45:30	1
2397529	99	47	40,5	cyclictest	2661907	-21	kworker/u8:3+events_unbound	00:15:46	1
2397524	99	47	36,8	cyclictest	2611855	-21	ntpq	22:40:40	0
2397524	99	47	35,9	cyclictest	2413378	-21	ntpq	19:20:38	0
2397524	99	47	28,3	cyclictest	2434053	-21	awk	19:45:00	0
2397531	99	46	37,6	cyclictest	2647372	-21	cat	23:20:00	2
2397524	99	46	34,9	cyclictest	2452911	-21	ntpq	20:00:39	0
2397524	99	46	26,3	cyclictest	2618174	-21	cpuspeed_turbos	22:50:29	0
2397529	99	45	41,3	cyclictest	2721877	-21	kworker/u8:3+events_unbound	00:35:47	1
2397529	99	45	41,3	cyclictest	2687141	-21	kworker/u8:2+events_unbound	00:24:49	1
2397529	99	45	40,3	cyclictest	2355418	-21	kworker/u8:0+events_unbound	21:00:36	1
2397529	99	45	38,5	cyclictest	2687141	-21	kworker/u8:2+events_unbound	00:05:42	1
2397524	99	45	35,8	cyclictest	2661279	-21	ntpq	23:30:38	0
2397529	99	44	40,3	cyclictest	2533076	-21	kworker/u8:2+events_unbound	21:25:29	1
2397531	99	43	36,5	cyclictest	2667456	-21	store	23:40:01	2
2397531	99	43	34,6	cyclictest	2439267	-21	apt-get	19:50:25	2
2397524	99	43	32,8	cyclictest	2537407	-21	ntpq	21:25:38	0
2397531	99	42	26,14	cyclictest	2618035	-21	aten2_r5power_p	22:50:27	2
2397529	99	42	38,3	cyclictest	2355418	-21	kworker/u8:0+events_unbound	22:10:30	1
2397524	99	42	20,9	cyclictest	2401526	-21	ntpq	19:10:39	0
2674956	2	41	0,1	sleep0	2674960	-21	kthreadcore	23:45:35	0
2412613	2	41	0,6	sleep3	45	1	irq_work/3	19:20:36	3
2397531	99	41	25,14	cyclictest	2637863	-21	aten2_r5power_v	23:10:28	2
2397529	99	41	37,3	cyclictest	2603064	-21	kworker/u8:0+events_unbound	22:40:38	1
2397529	99	41	37,3	cyclictest	2478155	-21	kworker/u8:1+events_unbound	20:35:34	1
2397524	99	41	32,7	cyclictest	2632816	-21	/usr/sbin/munin	23:05:44	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17