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 Aug 08, 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
2744514	99	52	47,4	cyclictest	3449492	-21	latency_hist	12:18:20	7
2743983	2	48	38,7	sleep5	0	-21	swapper/5	07:05:07	5
2744213	2	44	34,7	sleep4	0	-21	swapper/4	07:08:18	4
2744514	99	41	35,5	cyclictest	648	-21	systemd-journal	10:18:20	7
2744509	99	41	38,2	cyclictest	3006160	-21	kworker/u16:2+flush-8:0	09:58:51	6
2744504	99	41	39,2	cyclictest	2884053	-21	kworker/u16:0+events_unbound	08:53:46	5
2744504	99	41	36,5	cyclictest	2777440	-21	kworker/u16:1+flush-8:0	07:43:21	5
2744504	99	40	38,2	cyclictest	2744262	-21	kworker/u16:2+events_unbound	07:08:24	5
2744504	99	40	37,2	cyclictest	3311166	-21	kworker/u16:1+events_unbound	12:00:34	5
2739846	2	40	3,31	sleep7	0	-21	swapper/7	07:03:40	7
2744509	99	38	36,2	cyclictest	3449881	-21	kworker/u16:1+flush-8:0	12:28:20	6
2744509	99	38	36,2	cyclictest	3449881	-21	kworker/u16:1+flush-8:0	12:28:20	6
2744504	99	38	36,2	cyclictest	3449882	-21	kworker/u16:4+events_unbound	12:23:22	5
2744504	99	38	36,2	cyclictest	3449882	-21	kworker/u16:4+events_unbound	12:23:22	5
2744504	99	37	35,2	cyclictest	3112752	-21	kworker/u16:1+events_unbound	10:01:06	5
2744504	99	36	34,2	cyclictest	3104824	-21	kworker/u16:0+events_unbound	10:49:34	5
2744504	99	36	34,2	cyclictest	3006160	-21	kworker/u16:2+events_unbound	09:36:58	5
2744504	99	35	33,2	cyclictest	3311166	-21	kworker/u16:1+events_unbound	12:05:58	5
2744504	99	35	33,2	cyclictest	3240562	-21	kworker/u16:4+events_unbound	10:59:43	5
2744504	99	35	33,2	cyclictest	3178893	-21	kworker/u16:3+events_unbound	10:39:30	5
2744504	99	35	33,2	cyclictest	2982037	-21	kworker/u16:3+events_unbound	09:38:22	5
2744504	99	35	33,2	cyclictest	2982037	-21	kworker/u16:3+events_unbound	09:38:22	5
2744504	99	35	33,2	cyclictest	2982037	-21	kworker/u16:3+events_unbound	09:31:35	5
2744504	99	35	32,2	cyclictest	3265061	-21	kworker/u16:0+events_unbound	11:23:22	5
2744504	99	34	32,2	cyclictest	3434044	-21	kworker/u16:3+events_unbound	12:16:51	5
2744504	99	34	32,2	cyclictest	3412492	-21	kworker/u16:2+events_unbound	12:31:38	5
2744504	99	34	32,2	cyclictest	3388031	-21	kworker/u16:0+events_unbound	12:11:07	5
2744504	99	34	32,2	cyclictest	3178893	-21	kworker/u16:3+events_unbound	10:48:10	5
2744504	99	34	32,2	cyclictest	3178893	-21	kworker/u16:3+events_unbound	10:36:12	5
2744504	99	34	32,2	cyclictest	2904010	-21	kworker/u16:1+events_unbound	09:24:10	5
2744504	99	33	31,2	cyclictest	3265061	-21	kworker/u16:0+events_unbound	11:10:30	5
2744504	99	33	31,2	cyclictest	3178893	-21	kworker/u16:3+events_unbound	11:55:51	5
2744504	99	33	31,2	cyclictest	3178893	-21	kworker/u16:3+events_unbound	10:55:43	5
2744504	99	33	31,2	cyclictest	3018871	-21	kworker/u16:4+events_unbound	09:57:07	5
2744504	99	33	31,2	cyclictest	3006160	-21	kworker/u16:2+events_unbound	10:28:18	5
2744504	99	33	31,2	cyclictest	3006160	-21	kworker/u16:2+events_unbound	09:47:11	5
2744504	99	33	31,2	cyclictest	2982037	-21	kworker/u16:3+events_unbound	09:49:59	5
2744504	99	33	31,2	cyclictest	2904010	-21	kworker/u16:1+events_unbound	09:16:07	5
2744504	99	32	30,2	cyclictest	3412492	-21	kworker/u16:2+events_unbound	12:19:18	5
2744504	99	32	30,2	cyclictest	3349701	-21	kworker/u16:2+events_unbound	11:36:06	5
2744504	99	32	30,2	cyclictest	3240562	-21	kworker/u16:4+events_unbound	11:14:27	5
2744504	99	32	30,2	cyclictest	3178893	-21	kworker/u16:3+events_unbound	11:38:27	5
2744504	99	32	30,2	cyclictest	3178893	-21	kworker/u16:3+events_unbound	11:29:26	5
2744504	99	32	30,2	cyclictest	3104824	-21	kworker/u16:0+events_unbound	10:21:10	5
2744504	99	32	30,2	cyclictest	3006160	-21	kworker/u16:2+flush-8:0	10:04:06	5
2744504	99	32	30,2	cyclictest	3006160	-21	kworker/u16:2+events_unbound	10:15:02	5
2744504	99	32	30,2	cyclictest	3006160	-21	kworker/u16:2+events_unbound	09:23:03	5
2744504	99	32	30,2	cyclictest	2982037	-21	kworker/u16:3+events_unbound	09:09:24	5
2744504	99	32	29,2	cyclictest	3178893	-21	kworker/u16:3+events_unbound	11:03:26	5
2744504	99	32	29,2	cyclictest	3178893	-21	kworker/u16:3+events_unbound	11:03:26	5
2744504	99	31	29,2	cyclictest	3449881	-21	kworker/u16:1+events_unbound	12:36:14	5
2744504	99	31	29,2	cyclictest	3311166	-21	kworker/u16:1+events_unbound	11:45:06	5
2744504	99	31	29,2	cyclictest	3311166	-21	kworker/u16:1+events_unbound	11:45:06	5
2744504	99	31	29,2	cyclictest	3311166	-21	kworker/u16:1+events_unbound	11:22:26	5
2744504	99	31	29,2	cyclictest	3104824	-21	kworker/u16:0+events_unbound	10:30:54	5
2744504	99	31	28,2	cyclictest	2982037	-21	kworker/u16:3+events_unbound	10:08:31	5
2853489	2	30	0,0	chrt	74	1	rcuc/5	07:58:42	5
2744509	99	30	27,2	cyclictest	2904010	-21	kworker/u16:1+events_unbound	09:03:36	6
2744504	99	30	28,2	cyclictest	3349701	-21	kworker/u16:2+events_unbound	11:50:46	5
2744183	2	30	20,7	sleep6	0	-21	swapper/6	07:07:56	6
3200371	2	29	0,1	chrt	3200364	-21	ssh	10:33:50	7
2744499	99	28	26,2	cyclictest	3311166	-21	kworker/u16:1+events_unbound	11:58:35	4
2744499	99	28	26,2	cyclictest	3265061	-21	kworker/u16:0+events_unbound	11:03:38	4
2744499	99	28	26,2	cyclictest	3265061	-21	kworker/u16:0+events_unbound	11:03:38	4
2744499	99	28	26,2	cyclictest	3165114	-21	kworker/u16:1+events_unbound	10:23:01	4
2744499	99	28	26,2	cyclictest	2884053	-21	kworker/u16:0+events_unbound	09:01:27	4
2744499	99	28	26,2	cyclictest	2884053	-21	kworker/u16:0+events_unbound	08:53:48	4
2744514	99	27	24,2	cyclictest	125	-21	kswapd0	08:17:17	7
2744499	99	27	25,2	cyclictest	3265061	-21	kworker/u16:0+events_unbound	11:34:25	4
2744499	99	27	25,2	cyclictest	2904010	-21	kworker/u16:1+events_unbound	08:43:58	4
2744499	99	27	25,2	cyclictest	2884102	-21	kworker/u16:6+events_unbound	08:27:35	4
2744499	99	26	24,2	cyclictest	3178893	-21	kworker/u16:3+events_unbound	11:22:33	4
2744499	99	26	24,2	cyclictest	2481002	-21	kworker/u16:4+events_unbound	07:40:06	4
2744504	99	25	23,2	cyclictest	2481002	-21	kworker/u16:4+flush-8:0	07:19:31	5
2744504	99	25	22,2	cyclictest	2777440	-21	kworker/u16:1+events_unbound	07:33:43	5
2744499	99	25	23,2	cyclictest	3311166	-21	kworker/u16:1+events_unbound	11:54:48	4
2744499	99	25	23,2	cyclictest	3018871	-21	kworker/u16:4+events_unbound	09:24:23	4
2744499	99	25	23,2	cyclictest	2884054	-21	kworker/u16:3+events_unbound	08:21:51	4
2744499	99	25	23,2	cyclictest	2777440	-21	kworker/u16:1+events_unbound	07:34:51	4
2744499	99	25	23,2	cyclictest	2481002	-21	kworker/u16:4+events_unbound	08:04:39	4
2744504	99	24	22,2	cyclictest	2884053	-21	kworker/u16:0+flush-8:0	08:30:30	5
2744499	99	24	22,2	cyclictest	3449881	-21	kworker/u16:1+events_unbound	12:26:32	4
2744499	99	24	22,2	cyclictest	3449881	-21	kworker/u16:1+events_unbound	12:26:32	4
2744499	99	24	22,2	cyclictest	3388031	-21	kworker/u16:0+events_unbound	12:08:07	4
2744499	99	24	22,2	cyclictest	2982037	-21	kworker/u16:3+events_unbound	09:54:29	4
2744499	99	24	22,2	cyclictest	2904010	-21	kworker/u16:1+events_unbound	08:42:42	4
2744499	99	24	22,2	cyclictest	2777440	-21	kworker/u16:1+events_unbound	07:30:56	4
2744514	99	23	18,4	cyclictest	3498788	-21	latency_hist	12:38:20	7
2744514	99	23	18,4	cyclictest	3326627	-21	latency_hist	11:28:21	7
2744504	99	23	21,2	cyclictest	2884054	-21	kworker/u16:3+events_unbound	08:24:31	5
2744504	99	23	21,2	cyclictest	2826192	-21	kworker/u16:0+events_unbound	07:53:31	5
2744499	99	23	21,2	cyclictest	3112752	-21	kworker/u16:1+events_unbound	10:01:49	4
2744499	99	23	21,2	cyclictest	3104824	-21	kworker/u16:0+events_unbound	10:24:31	4
2744499	99	23	21,2	cyclictest	3018871	-21	kworker/u16:4+flush-8:0	09:44:14	4
2744499	99	23	21,2	cyclictest	2982037	-21	kworker/u16:3+events_unbound	09:29:18	4
2744499	99	23	21,2	cyclictest	2884054	-21	kworker/u16:3+events_unbound	08:52:59	4
2744499	99	23	21,2	cyclictest	2884053	-21	kworker/u16:0+events_unbound	09:13:56	4
2744499	99	23	21,2	cyclictest	2884053	-21	kworker/u16:0+events_unbound	08:33:35	4
2744499	99	23	21,2	cyclictest	2864745	-21	kworker/u16:1+events_unbound	08:17:02	4
2744499	99	23	21,2	cyclictest	2744262	-21	kworker/u16:2+events_unbound	07:51:04	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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