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 Mon Mar 30, 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
2629447	2	74	0,1	sleep7	2629448	-21	kthreadcore	22:23:12	7
2629447	2	74	0,1	sleep7	2629448	-21	kthreadcore	22:23:12	7
2197382	99	57	55,2	cyclictest	2670168	-21	kworker/u16:1+events_unbound	22:58:14	6
2196946	2	57	47,7	sleep6	0	-21	swapper/6	19:00:54	6
2196783	2	57	47,7	sleep5	0	-21	swapper/5	18:58:37	5
2197382	99	55	52,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	22:43:01	6
2197382	99	55	52,2	cyclictest	2334839	-21	kworker/u16:0+events_unbound	20:18:14	6
2197382	99	55	52,2	cyclictest	2334839	-21	kworker/u16:0+events_unbound	20:18:14	6
2197382	99	54	52,2	cyclictest	2789940	-21	kworker/u16:0+events_unbound	23:48:21	6
2197382	99	54	52,2	cyclictest	2511352	-21	kworker/u16:0+flush-8:0	23:18:04	6
2197376	99	54	51,3	cyclictest	2451472	-21	kworker/u16:4+events_unbound	22:38:20	4
2197376	99	53	51,2	cyclictest	2789940	-21	kworker/u16:0+events_unbound	00:13:05	4
2197382	99	52	50,2	cyclictest	2584066	-21	kworker/u16:1+events_unbound	22:18:04	6
2197382	99	51	49,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	23:13:17	6
2197382	99	50	47,2	cyclictest	2451472	-21	kworker/u16:4+flush-8:0	22:28:14	6
2197376	99	50	47,2	cyclictest	2886805	-21	kworker/u16:2+flush-8:0	00:18:04	4
2197382	99	46	44,2	cyclictest	2511352	-21	kworker/u16:0+flush-8:0	22:33:04	6
2197382	99	46	44,2	cyclictest	2451472	-21	kworker/u16:4+events_unbound	22:38:25	6
2197382	99	46	43,2	cyclictest	2766680	-21	kworker/u16:3+events_unbound	23:28:04	6
2197382	99	46	43,2	cyclictest	2511352	-21	kworker/u16:0+flush-8:0	22:48:14	6
2197376	99	46	44,2	cyclictest	2670168	-21	kworker/u16:1+flush-8:0	23:23:05	4
2197382	99	45	43,2	cyclictest	2908781	-21	kworker/u16:1+events_unbound	00:31:50	6
2197376	99	45	42,2	cyclictest	2451472	-21	kworker/u16:4+flush-8:0	22:18:05	4
2197382	99	44	42,2	cyclictest	2886805	-21	kworker/u16:2+events_unbound	00:18:19	6
2197382	99	44	42,2	cyclictest	2799507	-21	kworker/u16:6+flush-8:0	23:42:48	6
2196877	2	44	34,7	sleep4	0	-21	swapper/4	18:59:56	4
2197382	99	43	41,2	cyclictest	2908781	-21	kworker/u16:1+events_unbound	00:27:17	6
2197382	99	43	41,2	cyclictest	2859456	-21	kworker/u16:4+events_unbound	00:02:16	6
2197382	99	42	40,2	cyclictest	2859456	-21	kworker/u16:4+events_unbound	00:13:20	6
2197382	99	42	40,2	cyclictest	2799507	-21	kworker/u16:6+events_unbound	23:45:45	6
2197382	99	42	40,2	cyclictest	2799507	-21	kworker/u16:6+events_unbound	23:45:45	6
2197382	99	42	40,2	cyclictest	2799507	-21	kworker/u16:6+events_unbound	23:37:25	6
2197382	99	42	40,2	cyclictest	2451472	-21	kworker/u16:4+events_unbound	23:24:37	6
2197382	99	42	40,2	cyclictest	2442475	-21	kworker/u16:2+events_unbound	21:19:30	6
2197384	99	41	0,39	cyclictest	124	-21	kswapd0	21:58:13	7
2197382	99	41	39,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	21:44:41	6
2197382	99	40	38,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	21:37:45	6
2197382	99	40	38,2	cyclictest	2451472	-21	kworker/u16:4+events_unbound	23:06:34	6
2197382	99	40	38,2	cyclictest	2373176	-21	kworker/u16:0+events_unbound	21:13:54	6
2197382	99	40	37,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	22:52:53	6
2194333	2	40	0,30	sleep7	0	-21	swapper/7	18:58:15	7
2197384	99	39	33,5	cyclictest	2420743	-21	latency_hist	20:57:49	7
2197382	99	39	37,2	cyclictest	2838796	-21	kworker/u16:3+events_unbound	00:05:37	6
2197382	99	39	37,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	22:26:05	6
2197382	99	39	37,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	22:26:05	6
2197382	99	39	37,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	21:51:14	6
2197382	99	39	37,2	cyclictest	2488321	-21	kworker/u16:1+events_unbound	21:39:38	6
2197382	99	39	37,2	cyclictest	2451472	-21	kworker/u16:4+events_unbound	22:12:22	6
2197382	99	39	37,2	cyclictest	2451472	-21	kworker/u16:4+events_unbound	21:11:35	6
2197382	99	39	37,2	cyclictest	2442475	-21	kworker/u16:2+events_unbound	22:01:29	6
2197382	99	38	36,2	cyclictest	2838796	-21	kworker/u16:3+events_unbound	23:53:42	6
2197382	99	38	36,2	cyclictest	2451472	-21	kworker/u16:4+events_unbound	21:55:30	6
2197382	99	38	36,2	cyclictest	2442475	-21	kworker/u16:2+events_unbound	21:30:29	6
2197382	99	38	36,2	cyclictest	2442475	-21	kworker/u16:2+events_unbound	21:27:06	6
2197382	99	38	35,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	22:12:51	6
2197376	99	38	36,2	cyclictest	2790293	-21	kworker/u16:2+events_unbound	23:57:50	4
2197382	99	37	35,2	cyclictest	2451472	-21	kworker/u16:4+events_unbound	23:11:33	6
2197376	99	37	35,2	cyclictest	2789940	-21	kworker/u16:0+flush-8:0	23:43:17	4
2197376	99	37	35,2	cyclictest	2789940	-21	kworker/u16:0+flush-8:0	23:43:17	4
2197376	99	37	35,2	cyclictest	2789940	-21	kworker/u16:0+flush-8:0	23:33:09	4
2197376	99	37	34,2	cyclictest	2451472	-21	kworker/u16:4+flush-8:0	22:28:04	4
2197376	99	37	33,3	cyclictest	2790293	-21	kworker/u16:2+flush-8:0	23:38:05	4
2197382	99	35	33,2	cyclictest	2584066	-21	kworker/u16:1+events_unbound	22:04:17	6
2197382	99	35	32,2	cyclictest	2838796	-21	kworker/u16:3+events_unbound	00:07:50	6
2197376	99	35	33,2	cyclictest	2511352	-21	kworker/u16:0+flush-8:0	22:33:09	4
2197376	99	35	33,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	21:47:45	4
2197376	99	34	32,2	cyclictest	2886805	-21	kworker/u16:2+events_unbound	00:23:18	4
2197376	99	34	32,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	22:43:05	4
2197384	99	33	26,5	cyclictest	650	-21	systemd-journal	23:57:48	7
2197376	99	33	31,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	22:57:46	4
2197376	99	33	30,2	cyclictest	2451472	-21	kworker/u16:4+events_unbound	22:15:49	4
2197384	99	32	27,4	cyclictest	2754211	-21	latency_hist	23:17:49	7
2197382	99	32	30,2	cyclictest	2410847	-21	kworker/u16:3+events_unbound	21:04:29	6
2197382	99	32	30,2	cyclictest	2410847	-21	kworker/u16:3+events_unbound	21:04:29	6
2197376	99	32	30,2	cyclictest	2451472	-21	kworker/u16:4+events_unbound	22:52:10	4
2197376	99	32	29,2	cyclictest	2789940	-21	kworker/u16:0+events_unbound	00:08:08	4
2197382	99	31	29,2	cyclictest	2206717	-21	kworker/u16:2+events_unbound	19:11:38	6
2815513	2	30	0,1	chrt	2815516	-21	fschecks_time	23:43:02	7
2815513	2	30	0,1	chrt	2815516	-21	fschecks_time	23:43:02	7
2197382	99	30	28,2	cyclictest	2248974	-21	kworker/u16:3+flush-8:0	19:58:09	6
2197378	99	30	27,3	cyclictest	2859456	-21	kworker/u16:4+flush-8:0	00:07:06	5
2197376	99	30	28,2	cyclictest	2248974	-21	kworker/u16:3+events_unbound	19:58:08	4
2197382	99	29	27,2	cyclictest	2382935	-21	kworker/u16:1+events_unbound	20:55:38	6
2197376	99	29	27,2	cyclictest	2511352	-21	kworker/u16:0+flush-8:0	22:07:55	4
2197376	99	29	27,2	cyclictest	2442475	-21	kworker/u16:2+events_unbound	21:54:02	4
2197376	99	28	26,2	cyclictest	2670168	-21	kworker/u16:1+events_unbound	22:58:04	4
2197376	99	28	26,2	cyclictest	2488321	-21	kworker/u16:1+events_unbound	21:34:04	4
2197382	99	27	25,2	cyclictest	2206717	-21	kworker/u16:2+events_unbound	19:27:39	6
2197378	99	27	24,2	cyclictest	2789940	-21	kworker/u16:0+flush-8:0	23:32:49	5
2197376	99	27	25,2	cyclictest	2511352	-21	kworker/u16:0+events_unbound	21:48:10	4
2197376	99	27	25,2	cyclictest	2451472	-21	kworker/u16:4+events_unbound	23:04:03	4
2197376	99	27	25,2	cyclictest	2228899	-21	kworker/u16:0+flush-8:0	19:18:15	4
2197382	99	26	24,2	cyclictest	2334839	-21	kworker/u16:0+events_unbound	20:23:21	6
2197382	99	26	24,2	cyclictest	2238921	-21	kworker/u16:1+events_unbound	19:30:23	6
2197382	99	26	24,2	cyclictest	2187961	-21	kworker/u16:1+events_unbound	19:04:04	6
2197376	99	26	24,2	cyclictest	2859456	-21	kworker/u16:4+flush-8:0	00:03:19	4
2197376	99	26	24,2	cyclictest	2838796	-21	kworker/u16:3+events_unbound	23:55:41	4
2197376	99	26	24,2	cyclictest	2451472	-21	kworker/u16:4+events_unbound	23:30:26	4
2197376	99	26	24,2	cyclictest	2382935	-21	kworker/u16:1+events_unbound	20:52:44	4
2197382	99	25	23,2	cyclictest	2248974	-21	kworker/u16:3+events_unbound	19:54:22	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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