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 Jan 17, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2974673	2	96	0,1	sleep7	2974674	-21	rm	11:00:32	7
2455615	2	58	48,7	sleep6	0	-21	swapper/6	07:05:37	6
2455493	2	56	20,31	sleep7	0	-21	swapper/7	07:03:53	7
2455659	2	51	41,7	sleep5	0	-21	swapper/5	07:06:16	5
2455687	2	45	34,8	sleep4	0	-21	swapper/4	07:06:39	4
2456046	99	42	38,3	cyclictest	2963608	-21	kworker/u16:3+flush-8:0	11:12:33	5
2456046	99	39	36,2	cyclictest	2839378	-21	kworker/u16:3+events_unbound	10:22:48	5
2456048	99	38	34,3	cyclictest	2889917	-21	kworker/u16:0+flush-8:0	11:26:06	6
2456046	99	38	36,2	cyclictest	2752203	-21	kworker/u16:5+events_unbound	09:32:56	5
2456048	99	37	34,2	cyclictest	2752203	-21	kworker/u16:5+events_unbound	09:37:51	6
2456052	99	35	34,0	cyclictest	0	-21	swapper/7	12:01:47	7
2456046	99	35	33,2	cyclictest	2691283	-21	kworker/u16:0+flush-8:0	09:29:59	5
2456046	99	35	33,2	cyclictest	2691283	-21	kworker/u16:0+flush-8:0	09:29:59	5
2456052	99	34	33,0	cyclictest	0	-21	swapper/7	09:09:20	7
2456052	99	34	31,2	cyclictest	2729027	-21	ssh	09:22:17	7
2456046	99	34	32,2	cyclictest	2938862	-21	kworker/u16:1+events_unbound	10:53:02	5
2456046	99	34	31,2	cyclictest	3062350	-21	kworker/u16:2+flush-8:0	12:22:58	5
2456052	99	33	32,0	cyclictest	0	-21	swapper/7	12:07:14	7
2456052	99	32	31,0	cyclictest	0	-21	swapper/7	10:20:40	7
2456052	99	32	0,30	cyclictest	650	-21	systemd-journal	08:32:34	7
2456048	99	32	30,2	cyclictest	2663177	-21	kworker/u16:2+flush-8:0	09:08:33	6
2456046	99	32	29,2	cyclictest	2914138	-21	kworker/u16:4+events_unbound	10:47:47	5
2456046	99	32	29,2	cyclictest	2914138	-21	kworker/u16:4+events_unbound	10:47:47	5
2456052	99	31	31,0	cyclictest	0	-21	swapper/7	10:56:08	7
2456052	99	31	30,0	cyclictest	0	-21	swapper/7	11:45:40	7
2456048	99	31	28,2	cyclictest	2963608	-21	kworker/u16:3+flush-8:0	11:07:33	6
2456046	99	31	28,2	cyclictest	3062350	-21	kworker/u16:2+events_unbound	12:07:47	5
2456052	99	30	30,0	cyclictest	0	-21	swapper/7	09:55:09	7
2456052	99	30	29,0	cyclictest	0	-21	swapper/7	10:12:00	7
2456052	99	30	29,0	cyclictest	0	-21	swapper/7	10:12:00	7
2456052	99	30	0,29	cyclictest	5747	-21	gnome-shell	10:43:43	7
2456048	99	30	28,2	cyclictest	2889917	-21	kworker/u16:0+events_unbound	11:27:59	6
2456046	99	30	28,2	cyclictest	2938862	-21	kworker/u16:1+events_unbound	10:59:48	5
2456046	99	30	28,2	cyclictest	2813416	-21	kworker/u16:2+flush-8:0	10:18:03	5
2456046	99	30	28,2	cyclictest	2508247	-21	kworker/u16:3+events_unbound	07:52:47	5
2456046	99	30	27,2	cyclictest	2813416	-21	kworker/u16:2+flush-8:0	10:27:38	5
2456052	99	29	29,0	cyclictest	0	-21	swapper/7	11:55:28	7
2456052	99	29	28,0	cyclictest	0	-21	swapper/7	09:25:05	7
2456052	99	29	28,0	cyclictest	0	-21	swapper/7	08:25:35	7
2456052	99	29	27,1	cyclictest	0	-21	swapper/7	10:26:25	7
2456052	99	29	23,5	cyclictest	2790997	-21	latency_hist	09:47:34	7
2456048	99	29	28,1	cyclictest	2739832	-21	kworker/u16:1+events_unbound	09:37:12	6
2456046	99	29	26,2	cyclictest	2997596	-21	kworker/u16:4+events_unbound	12:32:48	5
2456046	99	29	26,2	cyclictest	2839378	-21	kworker/u16:3+flush-8:0	10:37:34	5
2456052	99	28	28,0	cyclictest	0	-21	swapper/7	11:20:08	7
2456052	99	28	27,1	cyclictest	2753642	-21	ssh	09:32:09	7
2456052	99	28	27,1	cyclictest	2753642	-21	ssh	09:32:09	7
2456052	99	28	27,0	cyclictest	0	-21	swapper/7	10:48:16	7
2456052	99	28	27,0	cyclictest	0	-21	swapper/7	10:48:16	7
2456046	99	28	26,2	cyclictest	2997596	-21	kworker/u16:4+events_unbound	11:17:55	5
2456046	99	28	26,2	cyclictest	2663177	-21	kworker/u16:2+events_unbound	09:02:47	5
2456052	99	27	26,0	cyclictest	0	-21	swapper/7	10:33:20	7
2456052	99	27	26,0	cyclictest	0	-21	swapper/7	08:46:04	7
2456052	99	27	26,0	cyclictest	0	-21	swapper/7	07:19:45	7
2456052	99	27	26,0	cyclictest	0	-21	swapper/7	07:19:45	7
2456048	99	27	25,2	cyclictest	3062350	-21	kworker/u16:2+flush-8:0	11:57:55	6
2456046	99	27	25,2	cyclictest	2889917	-21	kworker/u16:0+events_unbound	10:43:06	5
2456052	99	26	26,0	cyclictest	0	-21	swapper/7	09:35:21	7
2456052	99	26	25,1	cyclictest	0	-21	swapper/7	10:39:27	7
2456052	99	26	25,0	cyclictest	0	-21	swapper/7	08:55:39	7
2456048	99	26	24,2	cyclictest	2566736	-21	kworker/u16:0+events_unbound	08:02:51	6
2456048	99	26	24,2	cyclictest	2566736	-21	kworker/u16:0+events_unbound	08:02:51	6
2456046	99	26	24,2	cyclictest	2839378	-21	kworker/u16:3+flush-8:0	10:08:02	5
2456046	99	26	24,2	cyclictest	2839378	-21	kworker/u16:3+flush-8:0	10:08:02	5
2456046	99	26	24,2	cyclictest	2673202	-21	kworker/u16:3+flush-8:0	09:17:34	5
2456046	99	26	24,2	cyclictest	2508247	-21	kworker/u16:3+flush-8:0	08:12:59	5
2456052	99	25	25,0	cyclictest	0	-21	swapper/7	07:44:36	7
2456052	99	25	24,0	cyclictest	0	-21	swapper/7	07:09:00	7
2456048	99	25	22,2	cyclictest	3062350	-21	kworker/u16:2+flush-8:0	12:22:53	6
2456048	99	25	21,3	cyclictest	2825746	-21	kworker/u16:1+flush-8:0	10:12:39	6
2456046	99	25	21,3	cyclictest	2392020	-21	kworker/u16:1+events_unbound	07:12:47	5
2456052	99	24	24,0	cyclictest	0	-21	swapper/7	12:21:04	7
2456052	99	24	0,23	cyclictest	2479031	-21	latency_hist	07:17:34	7
2456048	99	24	21,2	cyclictest	2813416	-21	kworker/u16:2+flush-8:0	09:57:40	6
2456046	99	24	21,2	cyclictest	3062350	-21	kworker/u16:2+flush-8:0	11:57:57	5
2456052	99	23	23,0	cyclictest	0	-21	swapper/7	12:09:48	7
2456052	99	23	23,0	cyclictest	0	-21	swapper/7	11:37:16	7
2456052	99	23	23,0	cyclictest	0	-21	swapper/7	10:04:38	7
2456052	99	23	23,0	cyclictest	0	-21	swapper/7	09:48:50	7
2456052	99	23	22,0	cyclictest	0	-21	swapper/7	09:58:14	7
2456048	99	23	21,2	cyclictest	3046276	-21	kworker/u16:1+flush-8:0	11:32:52	6
2456048	99	23	21,2	cyclictest	3046276	-21	kworker/u16:1+events_unbound	12:27:49	6
2456048	99	23	21,2	cyclictest	2739832	-21	kworker/u16:1+flush-8:0	09:28:35	6
2456048	99	23	21,2	cyclictest	2739832	-21	kworker/u16:1+flush-8:0	09:28:35	6
2456048	99	23	20,2	cyclictest	2508247	-21	kworker/u16:3+events_unbound	08:17:52	6
2456048	99	23	20,2	cyclictest	2498620	-21	kworker/u16:2+events_unbound	07:57:46	6
2456046	99	23	21,2	cyclictest	2766419	-21	kworker/u16:0+events_unbound	09:47:57	5
2456045	99	23	20,2	cyclictest	2624621	-21	kworker/u16:3+flush-8:0	08:32:51	4
2786938	2	22	0,1	chrt	0	-21	swapper/6	09:42:57	6
2456052	99	22	22,0	cyclictest	0	-21	swapper/7	12:33:32	7
2456052	99	22	21,0	cyclictest	0	-21	swapper/7	07:54:03	7
2456052	99	22	21,0	cyclictest	0	-21	swapper/7	07:37:23	7
2456052	99	22	21,0	cyclictest	0	-21	swapper/7	07:23:59	7
2456046	99	22	19,2	cyclictest	2938862	-21	kworker/u16:1+flush-8:0	11:12:43	5
2456052	99	21	21,0	cyclictest	0	-21	swapper/7	11:24:06	7
2456052	99	21	21,0	cyclictest	0	-21	swapper/7	10:28:07	7
2456052	99	21	21,0	cyclictest	0	-21	swapper/7	09:38:31	7
2456052	99	21	21,0	cyclictest	0	-21	swapper/7	09:15:49	7
2456052	99	21	21,0	cyclictest	0	-21	swapper/7	08:41:56	7
2456052	99	21	21,0	cyclictest	0	-21	swapper/7	08:21:27	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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