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 Aug 24, 2026 00:43:36)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4116650	99	49	44,4	cyclictest	255961	-21	latency_hist	21:47:20	7
4116237	2	47	36,8	sleep4	0	-21	swapper/4	19:05:49	4
4116161	2	45	35,7	sleep5	0	-21	swapper/5	19:04:46	5
4116211	2	42	4,32	sleep7	0	-21	swapper/7	19:05:28	7
4116650	99	35	32,2	cyclictest	278168	-21	ssh	21:53:48	7
4116650	99	35	32,2	cyclictest	278168	-21	ssh	21:53:48	7
4116650	99	35	29,5	cyclictest	352046	-21	latency_hist	22:27:21	7
4116645	99	35	33,2	cyclictest	4097115	-21	kworker/u16:1+events_unbound	20:07:50	5
4116094	2	34	22,9	sleep6	0	-21	swapper/6	19:03:50	6
4116650	99	32	31,0	cyclictest	0	-21	swapper/7	00:26:59	7
4116650	99	32	30,1	cyclictest	531074	-21	ssh	23:40:19	7
4116650	99	32	30,1	cyclictest	399886	-21	ssh	22:47:07	7
4116650	99	31	30,0	cyclictest	0	-21	swapper/7	23:15:43	7
4116650	99	31	30,0	cyclictest	0	-21	swapper/7	23:15:43	7
4116645	99	31	29,2	cyclictest	460095	-21	kworker/u16:5+flush-8:0	23:44:51	5
4116645	99	31	28,2	cyclictest	4188590	-21	kworker/u16:2+events_unbound	20:42:22	5
4116642	99	31	28,2	cyclictest	388010	-21	kworker/u16:3+flush-8:0	23:27:40	4
4116650	99	30	29,0	cyclictest	0	-21	swapper/7	21:23:48	7
4116650	99	30	28,1	cyclictest	159976	-21	diskmemload	23:19:24	7
4116650	99	30	28,1	cyclictest	159976	-21	diskmemload	22:18:08	7
4116650	99	30	28,1	cyclictest	159976	-21	diskmemload	00:36:28	7
4116650	99	30	28,1	cyclictest	159976	-21	diskmemload	00:36:28	7
4116650	99	30	26,3	cyclictest	159976	-21	diskmemload	00:11:11	7
4116650	99	30	25,4	cyclictest	648	-21	systemd-journal	21:02:21	7
4116650	99	29	28,0	cyclictest	0	-21	swapper/7	23:22:55	7
4116650	99	29	28,0	cyclictest	0	-21	swapper/7	22:42:08	7
4116650	99	29	28,0	cyclictest	0	-21	swapper/7	00:18:31	7
4116650	99	29	27,1	cyclictest	422485	-21	ssh	22:54:23	7
4116650	99	29	27,1	cyclictest	159976	-21	diskmemload	22:13:52	7
4116650	99	29	23,5	cyclictest	4159094	-21	latency_hist	19:27:22	7
4116650	99	28	27,0	cyclictest	0	-21	swapper/7	23:32:55	7
4116650	99	28	27,0	cyclictest	0	-21	swapper/7	23:07:23	7
4116645	99	28	26,2	cyclictest	460095	-21	kworker/u16:5+events_unbound	23:38:25	5
4116645	99	28	26,2	cyclictest	130955	-21	kworker/u16:0+events_unbound	22:33:22	5
4116645	99	28	26,2	cyclictest	130955	-21	kworker/u16:0+events_unbound	22:33:22	5
4116650	99	27	26,0	cyclictest	0	-21	swapper/7	22:36:40	7
4116650	99	27	26,0	cyclictest	0	-21	swapper/7	22:36:40	7
4116650	99	27	23,3	cyclictest	613970	-21	ssh	00:13:04	7
4116645	99	27	25,2	cyclictest	615188	-21	kworker/u16:2+events_unbound	00:26:27	5
4116645	99	27	25,2	cyclictest	130955	-21	kworker/u16:0+flush-8:0	22:48:21	5
4116642	99	27	24,2	cyclictest	304414	-21	kworker/u16:2+flush-8:0	22:57:48	4
4116650	99	26	25,0	cyclictest	0	-21	swapper/7	23:03:28	7
4116650	99	26	25,0	cyclictest	0	-21	swapper/7	21:32:20	7
4116650	99	26	24,1	cyclictest	651132	-21	ssh	00:30:16	7
4116650	99	26	24,1	cyclictest	302073	-21	ssh	22:03:32	7
4116650	99	26	24,1	cyclictest	170943	-21	ssh	21:10:23	7
4116645	99	26	24,2	cyclictest	268017	-21	kworker/u16:3+flush-8:0	22:13:15	5
4116645	99	26	24,2	cyclictest	130955	-21	kworker/u16:0+events_unbound	22:57:05	5
4116645	99	26	24,2	cyclictest	130955	-21	kworker/u16:0+events_unbound	21:50:21	5
4116650	99	25	24,0	cyclictest	0	-21	swapper/7	21:42:20	7
4116650	99	25	23,1	cyclictest	507773	-21	ssh	23:31:52	7
4116650	99	25	23,1	cyclictest	0	-21	swapper/7	00:02:13	7
4116645	99	25	23,2	cyclictest	566034	-21	kworker/u16:2+events_unbound	23:56:28	5
4116645	99	25	23,2	cyclictest	566034	-21	kworker/u16:2+events_unbound	23:56:28	5
4116645	99	25	23,2	cyclictest	450153	-21	kworker/u16:4+events_unbound	23:30:50	5
4116645	99	25	23,2	cyclictest	4188590	-21	kworker/u16:2+events_unbound	20:02:57	5
4116645	99	25	23,2	cyclictest	4139872	-21	kworker/u16:0+flush-8:0	19:53:52	5
4116645	99	25	23,2	cyclictest	4097115	-21	kworker/u16:1+events_unbound	19:35:04	5
4116645	99	25	23,2	cyclictest	268017	-21	kworker/u16:3+events_unbound	22:28:25	5
4116645	99	25	23,2	cyclictest	130955	-21	kworker/u16:0+events_unbound	21:05:00	5
4116645	99	25	22,2	cyclictest	4116433	-21	kworker/u16:2+events_unbound	19:17:23	5
4116645	99	25	21,3	cyclictest	130955	-21	kworker/u16:0+flush-8:0	21:27:37	5
4116650	99	24	23,0	cyclictest	0	-21	swapper/7	23:48:31	7
4116647	99	24	18,6	cyclictest	130955	-21	kworker/u16:0+flush-8:0	22:52:32	6
4116645	99	24	22,2	cyclictest	92272	-21	kworker/u16:4+events_unbound	21:26:46	5
4116645	99	24	22,2	cyclictest	530194	-21	kworker/u16:1+events_unbound	00:33:26	5
4116645	99	24	22,2	cyclictest	530194	-21	kworker/u16:1+events_unbound	00:33:26	5
4116645	99	24	22,2	cyclictest	517889	-21	kworker/u16:0+events_unbound	23:50:42	5
4116645	99	24	22,2	cyclictest	517889	-21	kworker/u16:0+events_unbound	00:01:25	5
4116645	99	24	22,2	cyclictest	4188590	-21	kworker/u16:2+events_unbound	20:28:45	5
4116645	99	24	22,2	cyclictest	4188590	-21	kworker/u16:2+events_unbound	20:24:08	5
4116645	99	24	22,2	cyclictest	4139872	-21	kworker/u16:0+flush-8:0	19:41:45	5
4116645	99	24	22,2	cyclictest	4139872	-21	kworker/u16:0+events_unbound	20:19:24	5
4116645	99	24	22,2	cyclictest	4116433	-21	kworker/u16:2+events_unbound	19:12:44	5
4116645	99	24	22,2	cyclictest	304414	-21	kworker/u16:2+events_unbound	23:04:25	5
4116645	99	24	22,2	cyclictest	268017	-21	kworker/u16:3+events_unbound	22:07:58	5
4116645	99	24	22,2	cyclictest	268017	-21	kworker/u16:3+events_unbound	21:56:46	5
4116645	99	24	22,2	cyclictest	268017	-21	kworker/u16:3+events_unbound	21:56:46	5
4116645	99	24	22,2	cyclictest	268016	-21	kworker/u16:1+flush-8:0	21:59:23	5
4116650	99	23	22,0	cyclictest	0	-21	swapper/7	23:53:19	7
4116650	99	23	22,0	cyclictest	0	-21	swapper/7	23:53:19	7
4116650	99	23	22,0	cyclictest	0	-21	swapper/7	21:33:36	7
4116650	99	23	22,0	cyclictest	0	-21	swapper/7	21:18:25	7
4116645	99	23	21,2	cyclictest	91930	-21	kworker/u16:1+flush-8:0	20:34:59	5
4116645	99	23	21,2	cyclictest	530194	-21	kworker/u16:1+events_unbound	00:31:38	5
4116645	99	23	21,2	cyclictest	530194	-21	kworker/u16:1+events_unbound	00:20:22	5
4116645	99	23	21,2	cyclictest	530194	-21	kworker/u16:1+events_unbound	00:16:37	5
4116645	99	23	21,2	cyclictest	460095	-21	kworker/u16:5+events_unbound	00:08:25	5
4116645	99	23	21,2	cyclictest	4188590	-21	kworker/u16:2+events_unbound	20:39:44	5
4116645	99	23	21,2	cyclictest	4139872	-21	kworker/u16:0+events_unbound	19:29:44	5
4116645	99	23	21,2	cyclictest	4097115	-21	kworker/u16:1+events_unbound	19:45:45	5
4116645	99	23	21,2	cyclictest	130955	-21	kworker/u16:0+events_unbound	22:38:06	5
4116645	99	23	21,2	cyclictest	130955	-21	kworker/u16:0+events_unbound	21:47:07	5
4116645	99	23	20,2	cyclictest	460095	-21	kworker/u16:5+events_unbound	23:32:31	5
4116642	99	23	19,3	cyclictest	130955	-21	kworker/u16:0+flush-8:0	22:02:39	4
4116650	99	22	21,0	cyclictest	0	-21	swapper/7	21:49:08	7
4116650	99	22	20,1	cyclictest	411574	-21	ssh	22:51:35	7
4116645	99	22	20,2	cyclictest	92272	-21	kworker/u16:4+events_unbound	21:09:30	5
4116645	99	22	20,2	cyclictest	450153	-21	kworker/u16:4+flush-8:0	23:22:15	5
4116645	99	22	20,2	cyclictest	424018	-21	kworker/u16:1+events_unbound	23:11:46	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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