OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack0slot2.osadl.org (updated Sat Oct 25, 2025 00:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2725768	2	93	0,1	sleep5	0	-21	swapper/5	04:50:42	5
2547002	2	59	48,8	sleep4	0	-21	swapper/4	03:22:04	4
2547587	99	52	47,4	cyclictest	2612267	-21	latency_hist	03:55:25	7
2547584	99	48	45,2	cyclictest	2925355	-21	kworker/u16:1+events_unbound	07:29:47	4
2546936	2	47	36,8	sleep5	0	-21	swapper/5	03:21:09	5
2547586	99	46	44,2	cyclictest	2611933	-21	kworker/u16:5+events_unbound	04:20:48	6
2547584	99	45	43,2	cyclictest	2925355	-21	kworker/u16:1+events_unbound	07:17:48	4
2547584	99	45	43,2	cyclictest	2611933	-21	kworker/u16:5+events_unbound	04:26:48	4
2547587	99	44	43,0	cyclictest	0	-21	swapper/7	08:11:47	7
2547587	99	44	43,0	cyclictest	0	-21	swapper/7	06:11:47	7
2547587	99	44	43,0	cyclictest	0	-21	swapper/7	06:11:47	7
2547587	99	44	39,4	cyclictest	589235	-21	systemd-journal	06:10:25	7
2547584	99	44	42,2	cyclictest	2986093	-21	kworker/u16:3+events_unbound	07:09:04	4
2547587	99	43	42,0	cyclictest	0	-21	swapper/7	04:42:49	7
2547587	99	43	42,0	cyclictest	0	-21	swapper/7	04:42:49	7
2547584	99	43	40,2	cyclictest	3057160	-21	kworker/u16:0+events_unbound	07:38:48	4
2547587	99	42	38,2	cyclictest	2723555	-21	munin-run	04:50:25	7
2547587	99	42	37,4	cyclictest	2926274	-21	latency_hist	06:30:25	7
2547586	99	42	40,2	cyclictest	2744728	-21	kworker/u16:3+flush-8:0	05:10:47	6
2547584	99	42	40,2	cyclictest	2684344	-21	kworker/u16:1+flush-8:0	04:59:48	4
2547585	99	40	38,2	cyclictest	3099506	-21	kworker/u16:0+flush-8:0	08:35:51	5
2547584	99	40	38,2	cyclictest	2591180	-21	kworker/u16:3+events_unbound	03:51:49	4
2547055	2	40	30,7	sleep6	0	-21	swapper/6	03:22:46	6
2537542	2	40	5,30	sleep7	0	-21	swapper/7	03:20:31	7
2547587	99	39	38,0	cyclictest	0	-21	swapper/7	05:32:36	7
2547587	99	38	37,0	cyclictest	0	-21	swapper/7	03:49:48	7
2547584	99	38	36,2	cyclictest	2936136	-21	kworker/u16:4+events_unbound	06:56:47	4
2547584	99	38	36,2	cyclictest	2936136	-21	kworker/u16:4+events_unbound	06:56:47	4
2547584	99	38	36,2	cyclictest	2712475	-21	kworker/u16:3+events_unbound	04:51:49	4
2547586	99	37	35,2	cyclictest	2703119	-21	kworker/u16:2+flush-8:0	05:27:47	6
2547586	99	37	35,2	cyclictest	2703119	-21	kworker/u16:2+flush-8:0	05:27:47	6
2547586	99	37	35,2	cyclictest	2506758	-21	kworker/u16:2+flush-8:0	04:08:47	6
2547584	99	37	35,2	cyclictest	3027683	-21	kworker/u16:4+events_unbound	08:04:36	4
2547584	99	37	35,2	cyclictest	2591180	-21	kworker/u16:3+flush-8:0	04:12:48	4
2547586	99	36	33,2	cyclictest	2744728	-21	kworker/u16:3+flush-8:0	05:30:35	6
2547584	99	36	34,2	cyclictest	3200207	-21	kworker/u16:0+events_unbound	08:51:36	4
2547584	99	36	34,2	cyclictest	3189668	-21	kworker/u16:3+events_unbound	08:41:36	4
2547584	99	36	34,2	cyclictest	3099506	-21	kworker/u16:0+events_unbound	07:59:08	4
2547584	99	36	34,2	cyclictest	2813877	-21	kworker/u16:0+events_unbound	06:12:49	4
2547584	99	36	34,2	cyclictest	2813877	-21	kworker/u16:0+events_unbound	06:12:49	4
2547584	99	36	33,2	cyclictest	3057160	-21	kworker/u16:0+events_unbound	07:45:27	4
2547585	99	34	32,2	cyclictest	2986093	-21	kworker/u16:3+events_unbound	07:29:35	5
2547585	99	34	32,2	cyclictest	2506758	-21	kworker/u16:2+events_unbound	03:43:48	5
2547584	99	34	32,2	cyclictest	2703119	-21	kworker/u16:2+events_unbound	04:41:49	4
2547584	99	34	32,2	cyclictest	2703119	-21	kworker/u16:2+events_unbound	04:41:49	4
2547584	99	34	32,2	cyclictest	2526912	-21	kworker/u16:4+flush-8:0	03:31:12	4
2547587	99	33	0,31	cyclictest	589235	-21	systemd-journal	03:25:27	7
2547586	99	33	31,2	cyclictest	2925355	-21	kworker/u16:1+events_unbound	06:59:47	6
2547586	99	33	31,2	cyclictest	2925355	-21	kworker/u16:1+events_unbound	06:59:47	6
2547585	99	33	31,2	cyclictest	2733484	-21	kworker/u16:5+events_unbound	05:53:28	5
2547586	99	32	30,2	cyclictest	2793543	-21	kworker/u16:4+events_unbound	05:56:16	6
2547586	99	32	30,2	cyclictest	2733484	-21	kworker/u16:5+events_unbound	06:07:27	6
2547586	99	32	30,2	cyclictest	2611933	-21	kworker/u16:5+flush-8:0	04:31:20	6
2547585	99	32	30,2	cyclictest	3138155	-21	kworker/u16:5+events_unbound	08:19:35	5
2547585	99	32	30,2	cyclictest	3128709	-21	kworker/u16:2+events_unbound	08:21:44	5
2547585	99	32	30,2	cyclictest	2672734	-21	kworker/u16:0+events_unbound	04:45:24	5
2547585	99	32	30,2	cyclictest	2672734	-21	kworker/u16:0+events_unbound	04:45:24	5
2547584	99	32	30,2	cyclictest	3088186	-21	kworker/u16:1+flush-8:0	08:31:11	4
2547584	99	32	30,2	cyclictest	3088186	-21	kworker/u16:1+events_unbound	08:37:46	4
2547584	99	32	30,2	cyclictest	2747456	-21	kworker/u16:4+events_unbound	05:02:30	4
2547584	99	32	30,2	cyclictest	2506758	-21	kworker/u16:2+events_unbound	04:08:41	4
2547587	99	31	30,0	cyclictest	0	-21	swapper/7	07:59:47	7
2547587	99	31	30,0	cyclictest	0	-21	swapper/7	07:04:36	7
2547586	99	31	29,2	cyclictest	2733484	-21	kworker/u16:5+events_unbound	05:17:31	6
2547586	99	31	29,2	cyclictest	2684344	-21	kworker/u16:1+events_unbound	05:44:56	6
2547586	99	31	28,2	cyclictest	3099506	-21	kworker/u16:0+flush-8:0	07:59:12	6
2547586	99	31	28,2	cyclictest	3027683	-21	kworker/u16:4+flush-8:0	08:35:34	6
2547585	99	31	29,2	cyclictest	3088186	-21	kworker/u16:1+flush-8:0	08:40:50	5
2547585	99	31	29,2	cyclictest	2733484	-21	kworker/u16:5+events_unbound	06:25:53	5
2547585	99	31	29,2	cyclictest	2703119	-21	kworker/u16:2+flush-8:0	05:12:40	5
2547585	99	31	28,2	cyclictest	3027683	-21	kworker/u16:4+events_unbound	08:50:34	5
2547584	99	31	29,2	cyclictest	3057160	-21	kworker/u16:0+events_unbound	07:44:32	4
2547584	99	31	29,2	cyclictest	2925355	-21	kworker/u16:1+events_unbound	07:21:31	4
2547584	99	31	29,2	cyclictest	2733484	-21	kworker/u16:5+flush-8:0	05:22:34	4
2547584	99	31	29,2	cyclictest	2733484	-21	kworker/u16:5+flush-8:0	05:22:34	4
2547587	99	30	29,0	cyclictest	0	-21	swapper/7	03:32:16	7
2547587	99	30	25,4	cyclictest	2683126	-21	latency_hist	04:30:25	7
2547586	99	30	28,2	cyclictest	3128709	-21	kworker/u16:2+events_unbound	08:14:40	6
2547586	99	30	28,2	cyclictest	2925355	-21	kworker/u16:1+events_unbound	07:05:00	6
2547586	99	30	28,2	cyclictest	2712475	-21	kworker/u16:3+events_unbound	04:46:52	6
2547586	99	30	28,2	cyclictest	2703119	-21	kworker/u16:2+events_unbound	04:53:32	6
2547586	99	30	28,2	cyclictest	2506758	-21	kworker/u16:2+flush-8:0	04:11:40	6
2547586	99	30	28,2	cyclictest	2506758	-21	kworker/u16:2+events_unbound	03:44:00	6
2547585	99	30	28,2	cyclictest	2925355	-21	kworker/u16:1+events_unbound	06:41:31	5
2547585	99	30	27,2	cyclictest	2547798	-21	kworker/u16:3+flush-8:0	03:25:35	5
2547584	99	30	28,2	cyclictest	3088186	-21	kworker/u16:1+events_unbound	07:54:52	4
2547584	99	30	28,2	cyclictest	2936136	-21	kworker/u16:4+events_unbound	06:32:55	4
2547587	99	29	28,0	cyclictest	0	-21	swapper/7	07:36:47	7
2547587	99	29	28,0	cyclictest	0	-21	swapper/7	05:13:36	7
2547587	99	29	26,2	cyclictest	3179644	-21	ls	08:35:24	7
2547586	99	29	27,2	cyclictest	3189668	-21	kworker/u16:3+flush-8:0	08:41:51	6
2547586	99	29	27,2	cyclictest	3088186	-21	kworker/u16:1+events_unbound	07:48:27	6
2547586	99	29	27,2	cyclictest	2925355	-21	kworker/u16:1+flush-8:0	07:05:40	6
2547586	99	29	27,2	cyclictest	2813877	-21	kworker/u16:0+flush-8:0	06:44:39	6
2547586	99	29	27,2	cyclictest	2733484	-21	kworker/u16:5+events_unbound	05:37:27	6
2547586	99	29	27,2	cyclictest	2611933	-21	kworker/u16:5+events_unbound	04:40:05	6
2547586	99	29	27,2	cyclictest	2611933	-21	kworker/u16:5+events_unbound	04:29:28	6
2547585	99	29	27,2	cyclictest	3088186	-21	kworker/u16:1+flush-8:0	08:28:59	5
2547585	99	29	27,2	cyclictest	3088186	-21	kworker/u16:1+flush-8:0	07:54:39	5
2547585	99	29	27,2	cyclictest	3057160	-21	kworker/u16:0+events_unbound	07:43:12	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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