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 Fri Aug 28, 2026 00:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3813881	2	59	48,8	sleep5	0	-21	swapper/5	19:07:09	5
3814060	2	56	21,30	sleep7	0	-21	swapper/7	19:09:44	7
3814342	99	40	38,2	cyclictest	174857	-21	kworker/u16:2+flush-8:0	00:00:12	5
3813827	2	36	25,8	sleep4	0	-21	swapper/4	19:06:28	4
3814338	99	35	33,2	cyclictest	314188	-21	kworker/u16:2+events_unbound	00:15:48	4
3814338	99	33	31,2	cyclictest	200921	-21	kworker/u16:4+events_unbound	23:31:48	4
3814338	99	32	30,2	cyclictest	3795966	-21	kworker/u16:2+events_unbound	19:10:25	4
3814342	99	30	28,2	cyclictest	2453	-21	kworker/u16:1+flush-8:0	23:15:13	5
3814338	99	30	28,2	cyclictest	3774181	-21	kworker/u16:4+events_unbound	20:43:09	4
3814338	99	30	28,2	cyclictest	2453	-21	kworker/u16:1+events_unbound	22:38:35	4
3814338	99	30	28,2	cyclictest	2453	-21	kworker/u16:1+events_unbound	22:38:35	4
3809043	2	30	7,8	sleep6	0	-21	swapper/6	19:05:33	6
23294	2	30	0,1	sleep7	23296	-21	kthreadcore	22:15:16	7
3814344	99	29	27,2	cyclictest	3865268	-21	kworker/u16:3+flush-8:0	21:09:55	6
3814342	99	29	26,2	cyclictest	3774181	-21	kworker/u16:4+events_unbound	19:25:10	5
3814338	99	29	27,2	cyclictest	283139	-21	kworker/u16:5+events_unbound	00:09:47	4
3814338	99	29	27,2	cyclictest	112856	-21	kworker/u16:0+events_unbound	22:52:51	4
3814342	99	28	26,2	cyclictest	3865268	-21	kworker/u16:3+events_unbound	20:50:09	5
3814338	99	28	26,2	cyclictest	4149497	-21	kworker/u16:0+events_unbound	22:11:44	4
3814338	99	28	26,2	cyclictest	3865268	-21	kworker/u16:3+events_unbound	20:01:58	4
3814338	99	28	26,2	cyclictest	274356	-21	kworker/u16:4+events_unbound	00:01:11	4
3814338	99	28	26,2	cyclictest	214942	-21	kworker/u16:0+events_unbound	23:42:19	4
3814338	99	28	26,2	cyclictest	200920	-21	kworker/u16:3+events_unbound	23:58:19	4
3814338	99	28	26,2	cyclictest	125949	-21	kworker/u16:2+events_unbound	23:00:12	4
3814342	99	27	25,2	cyclictest	3865268	-21	kworker/u16:3+flush-8:0	21:05:20	5
3814342	99	27	25,2	cyclictest	3774181	-21	kworker/u16:4+events_unbound	20:30:17	5
3814338	99	27	25,2	cyclictest	63915	-21	kworker/u16:0+events_unbound	22:32:51	4
3814338	99	27	25,2	cyclictest	4149497	-21	kworker/u16:0+flush-8:0	21:56:13	4
3814338	99	27	25,2	cyclictest	4109592	-21	kworker/u16:4+events_unbound	21:50:03	4
3814338	99	27	25,2	cyclictest	3865268	-21	kworker/u16:3+events_unbound	20:48:37	4
3814338	99	27	25,2	cyclictest	3865268	-21	kworker/u16:3+events_unbound	20:33:57	4
3814338	99	27	25,2	cyclictest	3795966	-21	kworker/u16:2+events_unbound	19:27:01	4
3814338	99	27	25,2	cyclictest	3774181	-21	kworker/u16:4+events_unbound	20:39:02	4
3814338	99	27	25,2	cyclictest	3774181	-21	kworker/u16:4+events_unbound	20:14:09	4
3814338	99	27	25,2	cyclictest	335584	-21	kworker/u16:3+events_unbound	00:28:15	4
3814338	99	27	25,2	cyclictest	298763	-21	kworker/u16:0+events_unbound	00:14:14	4
3814338	99	27	25,2	cyclictest	174857	-21	kworker/u16:2+events_unbound	23:28:30	4
3814338	99	27	25,2	cyclictest	139820	-21	kworker/u16:3+flush-8:0	23:15:43	4
3814338	99	27	25,2	cyclictest	112856	-21	kworker/u16:0+events_unbound	22:56:35	4
3814338	99	26	24,2	cyclictest	78760	-21	kworker/u16:3+events_unbound	22:41:11	4
3814338	99	26	24,2	cyclictest	4109592	-21	kworker/u16:4+flush-8:0	22:09:01	4
3814338	99	26	24,2	cyclictest	4109592	-21	kworker/u16:4+events_unbound	22:17:50	4
3814338	99	26	24,2	cyclictest	4109592	-21	kworker/u16:4+events_unbound	22:02:35	4
3814338	99	26	24,2	cyclictest	4086396	-21	kworker/u16:2+events_unbound	21:47:24	4
3814338	99	26	24,2	cyclictest	4086396	-21	kworker/u16:2+events_unbound	21:34:40	4
3814338	99	26	24,2	cyclictest	3988644	-21	kworker/u16:2+flush-8:0	20:58:32	4
3814338	99	26	24,2	cyclictest	3895218	-21	kworker/u16:0+events_unbound	20:27:17	4
3814338	99	26	24,2	cyclictest	3895218	-21	kworker/u16:0+events_unbound	20:27:17	4
3814338	99	26	24,2	cyclictest	3865268	-21	kworker/u16:3+events_unbound	21:21:44	4
3814338	99	26	24,2	cyclictest	3865268	-21	kworker/u16:3+events_unbound	19:40:38	4
3814338	99	26	24,2	cyclictest	314188	-21	kworker/u16:2+events_unbound	00:36:11	4
3814338	99	26	24,2	cyclictest	298763	-21	kworker/u16:0+flush-8:0	00:31:31	4
3814338	99	26	24,2	cyclictest	298763	-21	kworker/u16:0+flush-8:0	00:31:31	4
3814338	99	26	24,2	cyclictest	2453	-21	kworker/u16:1+events_unbound	23:09:23	4
30870	2	26	0,1	chrt	30873	-21	irqcore	22:20:13	7
64991	2	25	0,1	chrt	64992	-21	sh	22:32:55	7
3814344	99	25	23,2	cyclictest	3895218	-21	kworker/u16:0+flush-8:0	20:35:10	6
3814342	99	25	22,2	cyclictest	4051528	-21	kworker/u16:1+flush-8:0	21:10:05	5
3814338	99	25	23,2	cyclictest	4124241	-21	kworker/u16:0+events_unbound	21:41:40	4
3814338	99	25	23,2	cyclictest	3865268	-21	kworker/u16:3+events_unbound	20:19:53	4
3814338	99	25	23,2	cyclictest	3795966	-21	kworker/u16:2+events_unbound	19:18:10	4
3814338	99	25	23,2	cyclictest	3774181	-21	kworker/u16:4+events_unbound	19:46:57	4
3814338	99	25	23,2	cyclictest	214942	-21	kworker/u16:0+flush-8:0	23:45:41	4
3814338	99	25	23,2	cyclictest	200920	-21	kworker/u16:3+flush-8:0	23:50:31	4
3814344	99	24	22,2	cyclictest	3865268	-21	kworker/u16:3+flush-8:0	21:14:50	6
3814342	99	24	22,2	cyclictest	3774181	-21	kworker/u16:4+events_unbound	19:35:24	5
3814338	99	24	22,2	cyclictest	4109592	-21	kworker/u16:4+events_unbound	22:47:36	4
3814338	99	24	22,2	cyclictest	4086396	-21	kworker/u16:2+events_unbound	21:29:02	4
3814338	99	24	22,2	cyclictest	3876846	-21	kworker/u16:2+events_unbound	19:52:37	4
3814338	99	24	22,2	cyclictest	3774181	-21	kworker/u16:4+events_unbound	20:21:25	4
3814338	99	24	22,2	cyclictest	3774181	-21	kworker/u16:4+events_unbound	20:08:29	4
3814344	99	23	21,2	cyclictest	3865268	-21	kworker/u16:3+flush-8:0	19:55:13	6
3814344	99	23	21,2	cyclictest	3865268	-21	kworker/u16:3+events_unbound	21:00:09	6
3814344	99	23	21,2	cyclictest	3774181	-21	kworker/u16:4+flush-8:0	19:20:21	6
3814342	99	23	21,2	cyclictest	4086396	-21	kworker/u16:2+flush-8:0	21:35:10	5
3814342	99	23	21,2	cyclictest	3915937	-21	kworker/u16:1+flush-8:0	20:05:11	5
3814342	99	23	20,2	cyclictest	48818	-21	kworker/u16:2+events_unbound	22:50:06	5
3814338	99	23	21,2	cyclictest	4109592	-21	kworker/u16:4+events_unbound	22:22:39	4
3814338	99	23	21,2	cyclictest	4014508	-21	kworker/u16:1+events_unbound	21:01:01	4
3814338	99	23	21,2	cyclictest	3865268	-21	kworker/u16:3+events_unbound	21:06:53	4
3814338	99	23	21,2	cyclictest	3865268	-21	kworker/u16:3+events_unbound	19:59:49	4
3814338	99	23	21,2	cyclictest	2453	-21	kworker/u16:1+events_unbound	22:26:43	4
221922	2	23	0,1	chrt	221925	-21	ntp_kernel_pll_	23:35:22	7
3814344	99	22	20,2	cyclictest	4051528	-21	kworker/u16:1+events_unbound	21:30:22	6
3814344	99	22	20,2	cyclictest	3865268	-21	kworker/u16:3+events_unbound	20:40:09	6
3814344	99	22	20,2	cyclictest	3795966	-21	kworker/u16:2+events_unbound	19:15:10	6
3814342	99	22	20,2	cyclictest	335584	-21	kworker/u16:3+flush-8:0	00:25:43	5
3814342	99	22	18,3	cyclictest	3824139	-21	cat	19:14:55	5
3814342	99	22	18,3	cyclictest	225074	-21	cat	23:39:54	5
3814338	99	22	20,2	cyclictest	4109592	-21	kworker/u16:4+events_unbound	21:35:43	4
3814338	99	22	20,2	cyclictest	274356	-21	kworker/u16:4+events_unbound	00:20:20	4
3814347	99	21	19,1	cyclictest	0	-21	swapper/7	20:24:54	7
3814344	99	21	19,2	cyclictest	3865268	-21	kworker/u16:3+flush-8:0	19:50:17	6
3814342	99	21	19,2	cyclictest	4041784	-21	kworker/u16:0+flush-8:0	21:15:10	5
3814342	99	21	16,4	cyclictest	3973981	-21	latency_hist	20:29:55	5
3814342	99	21	16,4	cyclictest	3973981	-21	latency_hist	20:29:55	5
3814338	99	21	19,2	cyclictest	3809024	-21	kworker/u16:0+flush-8:0	19:30:33	4
3814338	99	21	19,2	cyclictest	200920	-21	kworker/u16:3+events_unbound	23:35:11	4
3814344	99	20	18,2	cyclictest	4109592	-21	kworker/u16:4+flush-8:0	22:34:49	6
3814344	99	20	18,2	cyclictest	4041784	-21	kworker/u16:0+flush-8:0	21:15:19	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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