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 Sun May 24, 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
2657195	99	60	57,2	cyclictest	3206822	-21	kworker/u16:3+events_unbound	23:42:42	5
2657195	99	55	53,2	cyclictest	3253568	-21	kworker/u16:1+events_unbound	23:47:53	5
2657191	99	52	50,2	cyclictest	3353890	-21	kworker/u16:1+events_unbound	00:22:50	4
2657191	99	52	50,2	cyclictest	3024421	-21	kworker/u16:4+events_unbound	22:27:55	4
2657200	99	51	47,3	cyclictest	124	-21	kswapd0	00:32:19	7
2657195	99	51	49,2	cyclictest	3253568	-21	kworker/u16:1+events_unbound	23:37:51	5
2657191	99	49	47,2	cyclictest	3094646	-21	kworker/u16:0+events_unbound	23:47:55	4
2657191	99	46	43,2	cyclictest	3149631	-21	kworker/u16:1+events_unbound	22:57:41	4
2656756	2	44	33,8	sleep4	0	-21	swapper/4	19:05:12	4
2657195	99	43	41,2	cyclictest	3094646	-21	kworker/u16:0+events_unbound	23:02:56	5
2657195	99	43	41,2	cyclictest	3046412	-21	kworker/u16:1+flush-8:0	22:37:54	5
2657195	99	42	40,2	cyclictest	3094646	-21	kworker/u16:0+events_unbound	23:30:57	5
2656688	2	42	32,7	sleep5	0	-21	swapper/5	19:04:17	5
2657195	99	41	39,2	cyclictest	3302409	-21	kworker/u16:4+events_unbound	00:01:18	5
2657195	99	41	39,2	cyclictest	3133441	-21	kworker/u16:5+events_unbound	22:57:55	5
2657195	99	41	39,2	cyclictest	3024421	-21	kworker/u16:4+events_unbound	22:32:41	5
2657191	99	41	39,2	cyclictest	2619044	-21	kworker/u16:1+flush-8:0	19:42:52	4
2647769	2	41	5,30	sleep7	0	-21	swapper/7	19:02:34	7
2657195	99	40	38,2	cyclictest	3121105	-21	kworker/u16:4+events_unbound	22:52:40	5
2657191	99	40	38,2	cyclictest	3206822	-21	kworker/u16:3+events_unbound	00:01:10	4
2657191	99	40	38,2	cyclictest	3167248	-21	kworker/u16:2+events_unbound	23:22:38	4
2657200	99	39	36,2	cyclictest	2737869	-21	cat	19:47:25	7
2657195	99	39	37,2	cyclictest	3206822	-21	kworker/u16:3+flush-8:0	23:24:29	5
2657195	99	39	37,2	cyclictest	2997968	-21	kworker/u16:0+events_unbound	21:57:26	5
2657195	99	39	37,2	cyclictest	2903292	-21	kworker/u16:3+events_unbound	21:33:47	5
2657195	99	39	37,2	cyclictest	2903292	-21	kworker/u16:3+events_unbound	21:33:47	5
2657195	99	39	37,2	cyclictest	2863170	-21	kworker/u16:0+flush-8:0	21:28:02	5
2657195	99	39	36,2	cyclictest	3094646	-21	kworker/u16:0+events_unbound	23:12:38	5
2657191	99	39	36,2	cyclictest	3353890	-21	kworker/u16:1+events_unbound	00:32:40	4
2657195	99	38	36,2	cyclictest	3206822	-21	kworker/u16:3+events_unbound	23:35:38	5
2657195	99	38	36,2	cyclictest	2776151	-21	kworker/u16:3+events_unbound	20:57:26	5
2657195	99	38	35,2	cyclictest	3325395	-21	kworker/u16:0+flush-8:0	00:07:40	5
2657191	99	38	36,2	cyclictest	3149631	-21	kworker/u16:1+flush-8:0	22:52:52	4
2657195	99	37	35,2	cyclictest	3373739	-21	kworker/u16:3+events_unbound	00:26:25	5
2657195	99	37	35,2	cyclictest	3360149	-21	kworker/u16:2+events_unbound	00:21:18	5
2657195	99	37	35,2	cyclictest	3360149	-21	kworker/u16:2+events_unbound	00:21:18	5
2657195	99	37	35,2	cyclictest	3302409	-21	kworker/u16:4+events_unbound	00:16:41	5
2657195	99	37	35,2	cyclictest	3024421	-21	kworker/u16:4+events_unbound	22:23:39	5
2657195	99	37	35,2	cyclictest	3024421	-21	kworker/u16:4+events_unbound	22:14:09	5
2657195	99	37	35,2	cyclictest	3024421	-21	kworker/u16:4+events_unbound	22:14:09	5
2657195	99	37	35,2	cyclictest	2962195	-21	kworker/u16:2+events_unbound	21:54:46	5
2657191	99	37	35,2	cyclictest	3253568	-21	kworker/u16:1+events_unbound	23:40:49	4
2657195	99	36	34,2	cyclictest	3253568	-21	kworker/u16:1+events_unbound	23:54:10	5
2657195	99	36	34,2	cyclictest	3149631	-21	kworker/u16:1+events_unbound	23:11:46	5
2657195	99	36	34,2	cyclictest	3094646	-21	kworker/u16:0+events_unbound	22:31:18	5
2657195	99	36	34,2	cyclictest	3022332	-21	kworker/u16:3+events_unbound	22:04:42	5
2657195	99	36	34,2	cyclictest	2903292	-21	kworker/u16:3+events_unbound	21:13:59	5
2657195	99	36	34,2	cyclictest	2891408	-21	kworker/u16:2+events_unbound	21:09:27	5
2657195	99	36	34,2	cyclictest	2718532	-21	kworker/u16:2+events_unbound	19:57:21	5
2657191	99	36	34,2	cyclictest	3325395	-21	kworker/u16:0+events_unbound	00:21:45	4
2657191	99	36	34,2	cyclictest	3325395	-21	kworker/u16:0+events_unbound	00:21:45	4
2657191	99	36	34,2	cyclictest	3094646	-21	kworker/u16:0+flush-8:0	23:17:40	4
2657191	99	36	34,2	cyclictest	3094646	-21	kworker/u16:0+events_unbound	23:52:40	4
2657195	99	35	33,2	cyclictest	3360149	-21	kworker/u16:2+flush-8:0	00:32:39	5
2657195	99	35	33,2	cyclictest	3353890	-21	kworker/u16:1+events_unbound	00:31:02	5
2657195	99	35	33,2	cyclictest	3046412	-21	kworker/u16:1+events_unbound	22:20:22	5
2657195	99	35	33,2	cyclictest	2962195	-21	kworker/u16:2+events_unbound	21:45:19	5
3300973	2	34	0,1	chrt	3300971	-21	ssh	23:55:31	7
2657200	99	34	32,1	cyclictest	0	-21	swapper/7	21:07:42	7
2657195	99	34	32,2	cyclictest	3119952	-21	kworker/u16:3+flush-8:0	22:44:54	5
2657195	99	34	32,2	cyclictest	3094646	-21	kworker/u16:0+flush-8:0	22:47:54	5
2657195	99	34	32,2	cyclictest	3094646	-21	kworker/u16:0+events_unbound	23:18:46	5
2657195	99	34	32,2	cyclictest	2949669	-21	kworker/u16:1+events_unbound	21:39:06	5
2657195	99	34	32,2	cyclictest	2903292	-21	kworker/u16:3+events_unbound	21:23:06	5
2657191	99	34	32,2	cyclictest	3325395	-21	kworker/u16:0+events_unbound	00:09:50	4
2657191	99	34	32,2	cyclictest	3206822	-21	kworker/u16:3+events_unbound	00:05:05	4
2657191	99	34	32,2	cyclictest	3149631	-21	kworker/u16:1+events_unbound	23:04:10	4
2657191	99	34	32,2	cyclictest	3094646	-21	kworker/u16:0+events_unbound	23:12:44	4
2657191	99	34	32,2	cyclictest	3094646	-21	kworker/u16:0+events_unbound	22:41:42	4
2657195	99	33	31,2	cyclictest	3253568	-21	kworker/u16:1+events_unbound	00:03:49	5
2657195	99	33	31,2	cyclictest	2997968	-21	kworker/u16:0+events_unbound	21:48:17	5
2657195	99	33	30,2	cyclictest	0	-21	swapper/5	22:07:39	5
2657191	99	33	32,1	cyclictest	3206822	-21	kworker/u16:3+events_unbound	00:12:38	4
2657191	99	33	31,2	cyclictest	3206822	-21	kworker/u16:3+events_unbound	23:45:07	4
2657191	99	33	31,2	cyclictest	2619044	-21	kworker/u16:1+events_unbound	19:28:31	4
2657191	99	33	31,2	cyclictest	2619044	-21	kworker/u16:1+events_unbound	19:25:27	4
2657191	99	32	30,2	cyclictest	3241169	-21	kworker/u16:2+events_unbound	23:34:16	4
2657191	99	32	30,2	cyclictest	3094646	-21	kworker/u16:0+events_unbound	23:29:13	4
2657191	99	32	30,2	cyclictest	3094646	-21	kworker/u16:0+events_unbound	23:07:36	4
2657191	99	32	30,2	cyclictest	3046412	-21	kworker/u16:1+events_unbound	22:16:57	4
2657191	99	32	30,2	cyclictest	3046412	-21	kworker/u16:1+events_unbound	22:16:57	4
2657197	99	31	29,2	cyclictest	2997968	-21	kworker/u16:0+events_unbound	21:52:50	6
2657195	99	31	29,2	cyclictest	2903292	-21	kworker/u16:3+events_unbound	21:18:58	5
2657195	99	31	29,2	cyclictest	2776151	-21	kworker/u16:3+events_unbound	20:44:34	5
2657191	99	31	29,2	cyclictest	3353890	-21	kworker/u16:1+events_unbound	00:31:59	4
2657191	99	31	29,2	cyclictest	3094646	-21	kworker/u16:0+events_unbound	22:50:49	4
2657191	99	31	29,2	cyclictest	3046412	-21	kworker/u16:1+flush-8:0	22:25:16	4
2657191	99	31	29,2	cyclictest	2891408	-21	kworker/u16:2+events_unbound	21:06:31	4
2657200	99	30	28,1	cyclictest	0	-21	swapper/7	21:37:42	7
2657200	99	30	24,5	cyclictest	2785848	-21	latency_hist	20:12:24	7
2657200	99	30	24,5	cyclictest	2785848	-21	latency_hist	20:12:24	7
2657191	99	30	28,2	cyclictest	3024421	-21	kworker/u16:4+events_unbound	22:20:55	4
2657191	99	30	28,2	cyclictest	2903292	-21	kworker/u16:3+events_unbound	21:28:36	4
2657197	99	29	26,2	cyclictest	2997968	-21	kworker/u16:0+flush-8:0	21:52:24	6
2657195	99	29	27,2	cyclictest	2718532	-21	kworker/u16:2+events_unbound	19:45:31	5
2657191	99	29	27,2	cyclictest	3119952	-21	kworker/u16:3+events_unbound	22:43:55	4
2657191	99	29	27,2	cyclictest	3022332	-21	kworker/u16:3+events_unbound	22:00:16	4
2657191	99	29	27,2	cyclictest	2863170	-21	kworker/u16:0+events_unbound	20:57:01	4
2657197	99	28	26,2	cyclictest	2637042	-21	kworker/u16:2+events_unbound	19:22:47	6
2657197	99	28	25,2	cyclictest	2718532	-21	kworker/u16:2+events_unbound	19:47:38	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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