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 Wed Jun 03, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3183158	2	98	0,1	sleep7	3183157	-21	ssh	21:44:12	7
2880649	2	58	48,7	sleep4	0	-21	swapper/4	19:04:48	4
2880555	2	50	39,8	sleep5	0	-21	swapper/5	19:03:29	5
2881070	99	48	46,2	cyclictest	3399056	-21	kworker/u16:1+events_unbound	23:27:13	4
2881070	99	41	39,2	cyclictest	3305422	-21	kworker/u16:0+events_unbound	22:56:46	4
2880777	2	41	3,32	sleep7	0	-21	swapper/7	19:06:35	7
2881070	99	40	38,2	cyclictest	3570612	-21	kworker/u16:3+flush-8:0	00:31:45	4
2881070	99	38	36,2	cyclictest	2992615	-21	kworker/u16:1+events_unbound	22:26:46	4
2881070	99	38	35,2	cyclictest	3206303	-21	kworker/u16:2+events_unbound	21:55:13	4
2881070	99	38	35,2	cyclictest	2808535	-21	kworker/u16:0+events_unbound	19:41:46	4
2881070	99	37	35,2	cyclictest	2904714	-21	kworker/u16:3+flush-8:0	21:15:50	4
2881070	99	37	34,2	cyclictest	3305422	-21	kworker/u16:0+flush-8:0	22:56:21	4
2881070	99	37	34,2	cyclictest	3305422	-21	kworker/u16:0+flush-8:0	22:56:21	4
2881070	99	37	34,2	cyclictest	3305422	-21	kworker/u16:0+events_unbound	23:11:14	4
2881070	99	37	34,2	cyclictest	3305422	-21	kworker/u16:0+events_unbound	00:26:46	4
2881070	99	36	35,1	cyclictest	3206303	-21	kworker/u16:2+events_unbound	22:23:50	4
2881070	99	36	34,2	cyclictest	3305422	-21	kworker/u16:0+flush-8:0	23:20:45	4
2881070	99	36	34,2	cyclictest	3305422	-21	kworker/u16:0+events_unbound	23:56:21	4
2881070	99	36	33,2	cyclictest	2992615	-21	kworker/u16:1+events_unbound	20:21:46	4
2881076	99	35	33,2	cyclictest	3329494	-21	kworker/u16:5+flush-8:0	23:11:44	6
2881070	99	35	33,2	cyclictest	3305422	-21	kworker/u16:0+flush-8:0	00:09:13	4
2881070	99	35	32,3	cyclictest	2963716	-21	kworker/u16:0+flush-8:0	20:31:44	4
2881070	99	34	33,1	cyclictest	3206303	-21	kworker/u16:2+events_unbound	22:16:33	4
2881070	99	34	33,1	cyclictest	3206303	-21	kworker/u16:2+events_unbound	22:16:33	4
2881070	99	34	32,2	cyclictest	3206303	-21	kworker/u16:2+flush-8:0	22:01:34	4
2881070	99	34	32,2	cyclictest	2904714	-21	kworker/u16:3+events_unbound	23:04:10	4
2881070	99	34	31,2	cyclictest	2904714	-21	kworker/u16:3+flush-8:0	22:17:09	4
2881070	99	33	31,2	cyclictest	3522088	-21	kworker/u16:2+events_unbound	00:22:26	4
2881070	99	33	31,2	cyclictest	3329494	-21	kworker/u16:5+flush-8:0	23:32:26	4
2881070	99	33	31,2	cyclictest	3100354	-21	kworker/u16:0+events_unbound	21:44:43	4
2881070	99	33	31,2	cyclictest	2904714	-21	kworker/u16:3+events_unbound	21:36:41	4
2881070	99	33	31,2	cyclictest	2904714	-21	kworker/u16:3+events_unbound	21:36:41	4
2881070	99	33	31,2	cyclictest	2904714	-21	kworker/u16:3+events_unbound	21:29:03	4
2881070	99	33	30,2	cyclictest	3522088	-21	kworker/u16:2+events_unbound	00:11:53	4
2881070	99	33	30,2	cyclictest	2904714	-21	kworker/u16:3+events_unbound	21:16:45	4
2881076	99	32	30,2	cyclictest	2904714	-21	kworker/u16:3+events_unbound	22:32:05	6
2881070	99	32	30,2	cyclictest	3522088	-21	kworker/u16:2+flush-8:0	00:18:26	4
2881070	99	32	30,2	cyclictest	3399056	-21	kworker/u16:1+flush-8:0	23:36:53	4
2881070	99	32	30,2	cyclictest	3329494	-21	kworker/u16:5+events_unbound	00:06:42	4
2881070	99	32	30,2	cyclictest	3305422	-21	kworker/u16:0+flush-8:0	23:58:18	4
2881070	99	32	30,2	cyclictest	2992615	-21	kworker/u16:1+flush-8:0	22:10:26	4
2881070	99	32	30,2	cyclictest	2992615	-21	kworker/u16:1+events_unbound	21:37:35	4
2881070	99	32	30,2	cyclictest	2904714	-21	kworker/u16:3+events_unbound	22:38:30	4
2881076	99	31	29,2	cyclictest	3305422	-21	kworker/u16:0+events_unbound	23:42:01	6
2881073	99	31	28,2	cyclictest	3305422	-21	kworker/u16:0+flush-8:0	23:56:49	5
2881070	99	31	29,2	cyclictest	3206303	-21	kworker/u16:2+events_unbound	22:02:58	4
2881070	99	30	28,2	cyclictest	3399056	-21	kworker/u16:1+events_unbound	23:46:05	4
2881070	99	30	28,2	cyclictest	3329494	-21	kworker/u16:5+events_unbound	23:48:06	4
2881070	99	30	28,2	cyclictest	3329494	-21	kworker/u16:5+events_unbound	22:48:42	4
2881070	99	30	28,2	cyclictest	2992615	-21	kworker/u16:1+flush-8:0	21:10:43	4
2881070	99	30	27,2	cyclictest	2992615	-21	kworker/u16:1+events_unbound	22:45:14	4
2881078	99	29	22,6	cyclictest	635	-21	systemd-journal	22:46:43	7
2881076	99	27	25,2	cyclictest	2904714	-21	kworker/u16:3+flush-8:0	19:26:55	6
2881070	99	27	25,2	cyclictest	3329494	-21	kworker/u16:5+events_unbound	23:14:41	4
2881070	99	27	25,2	cyclictest	3100354	-21	kworker/u16:0+events_unbound	21:49:50	4
2881070	99	27	25,2	cyclictest	2904714	-21	kworker/u16:3+flush-8:0	22:33:49	4
2880788	2	27	17,7	sleep6	0	-21	swapper/6	19:06:43	6
2881070	99	26	24,2	cyclictest	3305422	-21	kworker/u16:0+events_unbound	23:23:58	4
2881070	99	26	24,2	cyclictest	3100354	-21	kworker/u16:0+flush-8:0	21:21:53	4
2881070	99	26	24,2	cyclictest	2880826	-21	kworker/u16:1+flush-8:0	19:17:54	4
2881076	99	25	23,2	cyclictest	2992615	-21	kworker/u16:1+flush-8:0	20:22:04	6
2881076	99	25	22,3	cyclictest	3305422	-21	kworker/u16:0+flush-8:0	23:32:01	6
2881078	99	24	1,21	cyclictest	0	-21	swapper/7	21:22:08	7
2881076	99	24	22,2	cyclictest	2992615	-21	kworker/u16:1+flush-8:0	21:31:50	6
2881076	99	24	22,2	cyclictest	2992615	-21	kworker/u16:1+flush-8:0	21:31:50	6
2881070	99	24	22,2	cyclictest	2904714	-21	kworker/u16:3+flush-8:0	20:47:01	4
2881070	99	24	22,2	cyclictest	2904714	-21	kworker/u16:3+events_unbound	20:12:54	4
2881070	99	24	22,2	cyclictest	2808535	-21	kworker/u16:0+events_unbound	19:14:54	4
2881070	99	24	21,2	cyclictest	2880826	-21	kworker/u16:1+events_unbound	19:06:47	4
2881078	99	23	16,5	cyclictest	635	-21	systemd-journal	19:41:44	7
2881076	99	23	21,2	cyclictest	3305422	-21	kworker/u16:0+events_unbound	22:56:56	6
2881076	99	23	21,2	cyclictest	3305422	-21	kworker/u16:0+events_unbound	00:12:10	6
2881076	99	23	21,2	cyclictest	2963716	-21	kworker/u16:0+events_unbound	20:27:10	6
2881076	99	23	20,2	cyclictest	3305422	-21	kworker/u16:0+flush-8:0	23:57:09	6
2881070	99	23	21,2	cyclictest	2925348	-21	kworker/u16:2+events_unbound	20:04:55	4
2881070	99	23	20,2	cyclictest	2925348	-21	kworker/u16:2+flush-8:0	19:57:13	4
2881076	99	21	19,2	cyclictest	3522088	-21	kworker/u16:2+flush-8:0	00:22:06	6
2881076	99	21	19,2	cyclictest	2925348	-21	kworker/u16:2+events_unbound	19:46:57	6
2881070	99	21	19,2	cyclictest	2880826	-21	kworker/u16:1+events_unbound	19:27:14	4
2881078	99	20	5,6	cyclictest	6101	-21	gmain	20:06:57	7
2881078	99	20	5,6	cyclictest	6101	-21	gmain	20:06:57	7
2881076	99	20	18,2	cyclictest	2808535	-21	kworker/u16:0+flush-8:0	19:42:08	6
2881076	99	20	18,2	cyclictest	2808535	-21	kworker/u16:0+flush-8:0	19:07:10	6
2881070	99	20	18,2	cyclictest	2904714	-21	kworker/u16:3+events_unbound	19:47:55	4
2881076	99	19	17,2	cyclictest	2880826	-21	kworker/u16:1+flush-8:0	19:16:44	6
2881070	99	19	17,2	cyclictest	2992615	-21	kworker/u16:1+events_unbound	21:03:14	4
2881078	99	18	16,1	cyclictest	3497848	-21	basename	23:56:44	7
2881078	99	18	0,17	cyclictest	0	-21	swapper/7	21:47:09	7
2881078	99	18	0,16	cyclictest	1234	-21	snmpd	22:20:56	7
2881076	99	18	16,2	cyclictest	3329494	-21	kworker/u16:5+flush-8:0	23:46:50	6
2881073	99	18	16,2	cyclictest	2992615	-21	kworker/u16:1+flush-8:0	21:57:02	5
2881070	99	18	16,2	cyclictest	2992615	-21	kworker/u16:1+events_unbound	20:33:14	4
2881070	99	18	16,2	cyclictest	2880826	-21	kworker/u16:1+events_unbound	19:40:18	4
2881076	99	17	15,2	cyclictest	2925348	-21	kworker/u16:2+events_unbound	20:02:01	6
2881078	99	16	13,2	cyclictest	0	-21	swapper/7	23:21:45	7
2881078	99	16	12,3	cyclictest	1234	-21	snmpd	20:16:17	7
2881076	99	16	14,2	cyclictest	2992615	-21	kworker/u16:1+flush-8:0	22:11:59	6
2881076	99	16	14,2	cyclictest	2992615	-21	kworker/u16:1+flush-8:0	22:11:59	6
2881076	99	16	14,2	cyclictest	2808535	-21	kworker/u16:0+events_unbound	19:37:06	6
2881070	99	16	14,2	cyclictest	3069554	-21	kworker/u16:2+events_unbound	20:59:54	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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