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 Aug 16, 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
2107484	2	61	51,7	sleep5	0	-21	swapper/5	19:04:24	5
2107717	2	54	19,30	sleep7	0	-21	swapper/7	19:07:39	7
2108038	99	49	42,5	cyclictest	2441072	-21	latency_hist	21:47:52	7
2107494	2	46	35,8	sleep4	0	-21	swapper/4	19:04:31	4
2108033	99	44	42,2	cyclictest	1840310	-21	kworker/u16:3+events_unbound	19:18:22	5
6324	89	41	0,33	rtkit-daemon	0	-21	swapper/6	19:03:55	6
2108038	99	39	33,5	cyclictest	648	-21	systemd-journal	21:02:51	7
2108028	99	39	36,2	cyclictest	2316271	-21	kworker/u16:1+events_unbound	22:03:05	4
2108033	99	38	36,2	cyclictest	2522977	-21	kworker/u16:4+events_unbound	22:41:29	5
2108033	99	37	35,2	cyclictest	2522977	-21	kworker/u16:4+flush-8:0	22:28:26	5
2108033	99	36	34,2	cyclictest	2366781	-21	kworker/u16:2+events_unbound	21:21:15	5
2108033	99	36	31,2	cyclictest	1840310	-21	kworker/u16:3+flush-8:0	19:12:52	5
2108033	99	35	33,2	cyclictest	2753763	-21	kworker/u16:2+events_unbound	00:31:54	5
2108033	99	35	33,2	cyclictest	2693285	-21	kworker/u16:4+events_unbound	23:41:58	5
2108033	99	35	33,2	cyclictest	2693285	-21	kworker/u16:4+events_unbound	23:41:58	5
2108033	99	35	33,2	cyclictest	2487954	-21	kworker/u16:0+events_unbound	22:07:09	5
2108034	99	34	32,2	cyclictest	2228419	-21	kworker/u16:0+events_unbound	20:43:07	6
2108033	99	34	32,2	cyclictest	2741196	-21	kworker/u16:0+flush-8:0	23:57:21	5
2108033	99	34	32,2	cyclictest	2692607	-21	kworker/u16:3+flush-8:0	00:06:13	5
2108033	99	34	32,2	cyclictest	2692607	-21	kworker/u16:3+events_unbound	23:51:17	5
2108033	99	34	32,2	cyclictest	2692607	-21	kworker/u16:3+events_unbound	23:45:54	5
2108033	99	34	32,2	cyclictest	2669181	-21	kworker/u16:1+events_unbound	23:33:51	5
2108033	99	34	32,2	cyclictest	2572105	-21	kworker/u16:1+events_unbound	23:11:13	5
2108033	99	34	32,2	cyclictest	2572105	-21	kworker/u16:1+events_unbound	22:46:26	5
2108033	99	34	32,2	cyclictest	2392842	-21	kworker/u16:0+events_unbound	21:52:14	5
2108033	99	34	32,2	cyclictest	2366781	-21	kworker/u16:2+events_unbound	22:13:38	5
2108033	99	34	32,2	cyclictest	2247541	-21	kworker/u16:4+flush-8:0	21:10:57	5
2108033	99	33	31,2	cyclictest	2803550	-21	kworker/u16:0+events_unbound	00:21:54	5
2108033	99	33	31,2	cyclictest	2753763	-21	kworker/u16:2+events_unbound	00:15:09	5
2108033	99	33	31,2	cyclictest	2572105	-21	kworker/u16:1+flush-8:0	23:01:53	5
2108033	99	33	31,2	cyclictest	2572105	-21	kworker/u16:1+flush-8:0	23:01:53	5
2108033	99	33	31,2	cyclictest	2522977	-21	kworker/u16:4+events_unbound	23:14:58	5
2108033	99	33	31,2	cyclictest	2475023	-21	kworker/u16:4+events_unbound	22:00:42	5
2108033	99	33	31,2	cyclictest	2366781	-21	kworker/u16:2+flush-8:0	21:54:49	5
2108033	99	33	31,2	cyclictest	2366781	-21	kworker/u16:2+events_unbound	22:26:06	5
2108033	99	33	31,2	cyclictest	2366781	-21	kworker/u16:2+events_unbound	21:26:55	5
2108033	99	33	31,2	cyclictest	2366781	-21	kworker/u16:2+events_unbound	21:16:54	5
2108038	99	32	27,4	cyclictest	2777450	-21	latency_hist	00:07:52	7
2108034	99	32	30,2	cyclictest	2366781	-21	kworker/u16:2+events_unbound	21:43:05	6
2108034	99	32	28,3	cyclictest	2209472	-21	kworker/u16:3+flush-8:0	20:18:18	6
2108034	99	32	28,3	cyclictest	2209472	-21	kworker/u16:3+flush-8:0	20:18:18	6
2108033	99	32	30,2	cyclictest	2631167	-21	kworker/u16:0+events_unbound	23:21:09	5
2108033	99	32	30,2	cyclictest	2572105	-21	kworker/u16:1+events_unbound	22:48:54	5
2108033	99	32	30,2	cyclictest	2487954	-21	kworker/u16:0+events_unbound	22:10:17	5
2108033	99	32	30,2	cyclictest	2366781	-21	kworker/u16:2+events_unbound	21:40:54	5
2108033	99	32	30,2	cyclictest	2366781	-21	kworker/u16:2+events_unbound	21:40:54	5
2108033	99	32	30,2	cyclictest	2366781	-21	kworker/u16:2+events_unbound	21:29:42	5
2108033	99	32	29,2	cyclictest	2631167	-21	kworker/u16:0+events_unbound	23:29:45	5
2108033	99	32	28,3	cyclictest	2228419	-21	kworker/u16:0+flush-8:0	20:58:10	5
2108028	99	32	29,2	cyclictest	2522977	-21	kworker/u16:4+flush-8:0	22:53:18	4
2108028	99	32	29,2	cyclictest	1840310	-21	kworker/u16:3+flush-8:0	19:33:10	4
2108033	99	31	29,2	cyclictest	2803550	-21	kworker/u16:0+flush-8:0	00:34:54	5
2108033	99	31	29,2	cyclictest	2753763	-21	kworker/u16:2+events_unbound	00:01:29	5
2108033	99	31	29,2	cyclictest	2669181	-21	kworker/u16:1+events_unbound	00:11:50	5
2108033	99	31	29,2	cyclictest	2657023	-21	kworker/u16:3+events_unbound	23:24:38	5
2108033	99	31	29,2	cyclictest	2522977	-21	kworker/u16:4+events_unbound	22:20:54	5
2108033	99	31	29,2	cyclictest	2522977	-21	kworker/u16:4+events_unbound	22:20:54	5
2108033	99	31	29,2	cyclictest	2316271	-21	kworker/u16:1+flush-8:0	22:33:54	5
2108033	99	31	29,2	cyclictest	2316271	-21	kworker/u16:1+events_unbound	21:45:39	5
2108033	99	30	28,2	cyclictest	2753763	-21	kworker/u16:2+events_unbound	00:26:10	5
2108033	99	30	28,2	cyclictest	2753763	-21	kworker/u16:2+events_unbound	00:26:10	5
2108033	99	30	28,2	cyclictest	2631167	-21	kworker/u16:0+flush-8:0	23:04:37	5
2108033	99	30	28,2	cyclictest	2132977	-21	kworker/u16:4+flush-8:0	19:23:14	5
2108033	99	30	27,2	cyclictest	2228419	-21	kworker/u16:0+events_unbound	20:47:54	5
2108033	99	30	27,2	cyclictest	2228419	-21	kworker/u16:0+events_unbound	20:18:02	5
2108033	99	30	27,2	cyclictest	2228419	-21	kworker/u16:0+events_unbound	20:18:02	5
2108028	99	30	27,2	cyclictest	2692607	-21	kworker/u16:3+flush-8:0	23:48:07	4
2108033	99	29	27,2	cyclictest	2392842	-21	kworker/u16:0+events_unbound	21:35:51	5
2108033	99	29	27,2	cyclictest	2132977	-21	kworker/u16:4+flush-8:0	19:58:26	5
2108033	99	29	27,2	cyclictest	1840310	-21	kworker/u16:3+events_unbound	19:13:07	5
2108033	99	28	26,2	cyclictest	2366781	-21	kworker/u16:2+events_unbound	22:55:41	5
2108033	99	28	26,2	cyclictest	2189356	-21	kworker/u16:0+events_unbound	19:45:01	5
2108033	99	27	25,2	cyclictest	2069502	-21	kworker/u16:1+events_unbound	20:16:03	5
2655869	2	26	0,1	chrt	2655867	-21	ssh	23:15:07	7
2108038	99	26	20,5	cyclictest	2247867	-21	latency_hist	20:17:52	7
2108034	99	26	24,2	cyclictest	2209472	-21	kworker/u16:3+events_unbound	21:26:34	6
2108033	99	26	24,2	cyclictest	1840310	-21	kworker/u16:3+events_unbound	19:30:02	5
2108033	99	26	23,2	cyclictest	1840310	-21	kworker/u16:3+events_unbound	19:32:54	5
2108038	99	25	19,5	cyclictest	648	-21	systemd-journal	21:52:51	7
2108034	99	25	23,2	cyclictest	2366781	-21	kworker/u16:2+events_unbound	22:15:02	6
2108033	99	25	23,2	cyclictest	2316271	-21	kworker/u16:1+events_unbound	21:05:02	5
2108033	99	25	23,2	cyclictest	2169792	-21	kworker/u16:2+events_unbound	19:39:03	5
2108033	99	25	23,2	cyclictest	2069502	-21	kworker/u16:1+flush-8:0	20:10:02	5
2108028	99	25	23,2	cyclictest	2209472	-21	kworker/u16:3+flush-8:0	21:48:12	4
2108028	99	25	22,2	cyclictest	2132977	-21	kworker/u16:4+flush-8:0	19:58:08	4
2108034	99	24	22,2	cyclictest	2631167	-21	kworker/u16:0+events_unbound	23:17:17	6
2108034	99	23	21,2	cyclictest	2522977	-21	kworker/u16:4+events_unbound	22:51:42	6
2108034	99	23	21,2	cyclictest	1840310	-21	kworker/u16:3+events_unbound	19:18:18	6
2108033	99	23	21,2	cyclictest	2247541	-21	kworker/u16:4+events_unbound	20:36:03	5
2108033	99	23	21,2	cyclictest	2209472	-21	kworker/u16:3+events_unbound	20:32:01	5
2108028	99	23	21,2	cyclictest	2572105	-21	kworker/u16:1+flush-8:0	22:43:17	4
2108038	99	22	21,0	cyclictest	0	-21	swapper/7	23:48:56	7
2108038	99	22	21,0	cyclictest	0	-21	swapper/7	23:10:52	7
2108038	99	22	21,0	cyclictest	0	-21	swapper/7	19:40:31	7
2108038	99	22	20,1	cyclictest	0	-21	swapper/7	00:24:20	7
2108038	99	22	20,1	cyclictest	0	-21	swapper/7	00:24:20	7
2108034	99	22	20,2	cyclictest	2522977	-21	kworker/u16:4+events_unbound	22:39:30	6
2108034	99	22	20,2	cyclictest	2209472	-21	kworker/u16:3+events_unbound	22:05:43	6
2108034	99	22	20,2	cyclictest	2209472	-21	kworker/u16:3+events_unbound	20:03:05	6
2108038	99	21	20,0	cyclictest	0	-21	swapper/7	20:07:23	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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