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 21, 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
697703	2	101	0,1	sleep7	697701	-21	ssh	22:15:26	7
951116	2	96	0,1	sleep7	951117	-21	rm	00:02:17	7
292316	2	55	21,29	sleep7	0	-21	swapper/7	19:04:32	7
292316	2	55	21,29	sleep7	0	-21	swapper/7	19:04:32	7
292264	2	53	43,7	sleep4	0	-21	swapper/4	19:03:49	4
292264	2	53	43,7	sleep4	0	-21	swapper/4	19:03:49	4
6324	89	43	0,36	rtkit-daemon	0	-21	swapper/6	19:03:55	6
6324	89	43	0,36	rtkit-daemon	0	-21	swapper/6	19:03:55	6
292265	2	41	29,8	sleep5	0	-21	swapper/5	19:03:50	5
292265	2	41	29,8	sleep5	0	-21	swapper/5	19:03:50	5
292823	99	39	34,4	cyclictest	674731	-21	latency_hist	22:07:32	7
292810	99	33	31,2	cyclictest	901699	-21	kworker/u16:3+events_unbound	23:45:29	4
292823	99	32	26,5	cyclictest	987316	-21	latency_hist	00:17:32	7
292818	99	31	29,2	cyclictest	963520	-21	kworker/u16:2+events_unbound	00:27:54	6
292818	99	30	27,2	cyclictest	501291	-21	kworker/u16:1+flush-8:0	20:52:48	6
292818	99	29	27,2	cyclictest	963520	-21	kworker/u16:2+flush-8:0	00:12:59	6
292818	99	29	27,2	cyclictest	854915	-21	kworker/u16:1+events_unbound	23:32:47	6
292818	99	28	26,2	cyclictest	889594	-21	kworker/u16:2+events_unbound	23:47:56	6
292823	99	27	0,25	cyclictest	413405	-21	latency_hist	20:07:32	7
292818	99	27	25,2	cyclictest	452450	-21	kworker/u16:3+flush-8:0	21:47:32	6
292818	99	27	24,3	cyclictest	712518	-21	kworker/u16:0+flush-8:0	23:07:47	6
292814	99	27	25,2	cyclictest	758996	-21	kworker/u16:3+flush-8:0	23:02:28	5
292814	99	27	25,2	cyclictest	600365	-21	kworker/u16:0+flush-8:0	22:12:45	5
292814	99	27	25,2	cyclictest	452450	-21	kworker/u16:3+flush-8:0	21:53:01	5
292818	99	25	23,2	cyclictest	927687	-21	kworker/u16:0+events_unbound	23:52:55	6
292814	99	25	23,2	cyclictest	963520	-21	kworker/u16:2+flush-8:0	00:32:47	5
292814	99	25	23,2	cyclictest	962467	-21	kworker/u16:0+flush-8:0	00:23:03	5
292814	99	25	23,2	cyclictest	794314	-21	kworker/u16:2+events_unbound	23:27:48	5
292814	99	25	23,2	cyclictest	553555	-21	kworker/u16:0+flush-8:0	21:22:48	5
292814	99	25	23,2	cyclictest	501291	-21	kworker/u16:1+events_unbound	21:02:57	5
292814	99	25	21,3	cyclictest	854915	-21	kworker/u16:1+flush-8:0	23:32:58	5
292823	99	24	18,5	cyclictest	648	-21	systemd-journal	19:12:33	7
292814	99	24	22,2	cyclictest	686342	-21	kworker/u16:1+events_unbound	22:27:46	5
292814	99	24	22,2	cyclictest	452450	-21	kworker/u16:3+events_unbound	21:48:00	5
292814	99	24	22,2	cyclictest	452450	-21	kworker/u16:3+events_unbound	20:28:00	5
292814	99	24	22,2	cyclictest	335118	-21	kworker/u16:1+flush-8:0	19:32:56	5
292814	99	24	21,3	cyclictest	452450	-21	kworker/u16:3+events_unbound	21:17:56	5
292818	99	23	19,3	cyclictest	491103	-21	kworker/u16:0+flush-8:0	20:47:51	6
292814	99	23	21,2	cyclictest	901699	-21	kworker/u16:3+flush-8:0	00:02:55	5
292814	99	23	21,2	cyclictest	452450	-21	kworker/u16:3+flush-8:0	21:12:46	5
292814	99	23	21,2	cyclictest	3795227	-21	kworker/u16:6+flush-8:0	19:22:56	5
292814	99	23	21,2	cyclictest	374151	-21	kworker/u16:0+events_unbound	19:48:22	5
292810	99	23	19,3	cyclictest	292459	-21	kworker/u16:2+flush-8:0	19:37:49	4
292823	99	22	3,18	cyclictest	125	-21	kswapd0	22:32:55	7
292818	99	22	20,2	cyclictest	335118	-21	kworker/u16:1+flush-8:0	19:37:59	6
292818	99	22	20,2	cyclictest	302406	-21	kworker/u16:0+flush-8:0	19:23:02	6
292814	99	22	20,2	cyclictest	963520	-21	kworker/u16:2+events_unbound	00:22:27	5
292814	99	22	20,2	cyclictest	963520	-21	kworker/u16:2+events_unbound	00:22:27	5
292814	99	22	20,2	cyclictest	948965	-21	kworker/u16:5+flush-8:0	00:17:26	5
292814	99	22	20,2	cyclictest	854915	-21	kworker/u16:1+flush-8:0	23:22:38	5
292814	99	22	20,2	cyclictest	600365	-21	kworker/u16:0+events_unbound	21:58:02	5
292823	99	21	16,4	cyclictest	542363	-21	latency_hist	21:12:33	7
292823	99	21	15,5	cyclictest	520598	-21	latency_hist	21:02:32	7
292823	99	21	15,5	cyclictest	520598	-21	latency_hist	21:02:32	7
292818	99	21	19,2	cyclictest	673016	-21	kworker/u16:2+flush-8:0	22:17:58	6
292818	99	21	19,2	cyclictest	638573	-21	kworker/u16:1+flush-8:0	22:02:46	6
292818	99	21	19,2	cyclictest	393520	-21	kworker/u16:4+flush-8:0	20:37:28	6
292818	99	21	18,2	cyclictest	335118	-21	kworker/u16:1+events_unbound	19:27:51	6
292814	99	21	19,2	cyclictest	758996	-21	kworker/u16:3+flush-8:0	22:53:01	5
292814	99	21	19,2	cyclictest	600365	-21	kworker/u16:0+flush-8:0	22:12:32	5
292814	99	21	19,2	cyclictest	452450	-21	kworker/u16:3+events_unbound	20:47:48	5
292814	99	21	15,2	cyclictest	794314	-21	kworker/u16:2+events_unbound	23:18:00	5
292823	99	20	17,2	cyclictest	125	-21	kswapd0	00:07:28	7
292818	99	20	18,2	cyclictest	962467	-21	kworker/u16:0+flush-8:0	00:22:57	6
292818	99	20	18,2	cyclictest	962467	-21	kworker/u16:0+events_unbound	00:07:44	6
292818	99	20	18,2	cyclictest	292459	-21	kworker/u16:2+events_unbound	19:52:59	6
292814	99	20	18,2	cyclictest	818754	-21	kworker/u16:1+flush-8:0	23:15:59	5
292814	99	20	18,2	cyclictest	698890	-21	kworker/u16:4+events_unbound	22:18:00	5
292814	99	20	18,2	cyclictest	600365	-21	kworker/u16:0+events_unbound	21:42:57	5
292814	99	20	18,2	cyclictest	354939	-21	kworker/u16:3+flush-8:0	19:42:55	5
292814	99	20	18,2	cyclictest	302406	-21	kworker/u16:0+events_unbound	19:13:03	5
292810	99	20	2,17	cyclictest	892477	-21	irqcore	23:37:48	4
292823	99	19	1,16	cyclictest	734846	-21	latency_hist	22:32:32	7
292818	99	19	17,2	cyclictest	758996	-21	kworker/u16:3+events_unbound	23:02:45	6
292818	99	19	17,2	cyclictest	491103	-21	kworker/u16:0+events_unbound	21:07:46	6
292818	99	19	17,2	cyclictest	302406	-21	kworker/u16:0+flush-8:0	19:17:59	6
292818	99	19	17,2	cyclictest	1035040	-21	kworker/u16:0+flush-8:0	00:37:27	6
292814	99	19	17,2	cyclictest	530112	-21	kworker/u16:2+events_unbound	21:07:48	5
292818	99	18	16,2	cyclictest	553555	-21	kworker/u16:0+flush-8:0	21:23:01	6
292818	99	18	16,2	cyclictest	540874	-21	kworker/u16:1+events_unbound	21:12:55	6
292818	99	18	16,2	cyclictest	452450	-21	kworker/u16:3+events_unbound	21:32:47	6
292818	99	18	16,2	cyclictest	452450	-21	kworker/u16:3+events_unbound	21:32:47	6
292818	99	18	16,2	cyclictest	374151	-21	kworker/u16:0+events_unbound	19:57:45	6
292818	99	18	16,2	cyclictest	292459	-21	kworker/u16:2+flush-8:0	19:12:28	6
292814	99	18	16,2	cyclictest	927687	-21	kworker/u16:0+events_unbound	23:57:54	5
292814	99	18	16,2	cyclictest	889594	-21	kworker/u16:2+flush-8:0	23:52:30	5
292814	99	18	16,2	cyclictest	854915	-21	kworker/u16:1+flush-8:0	23:52:56	5
292814	99	18	16,2	cyclictest	712518	-21	kworker/u16:0+events_unbound	23:06:51	5
292814	99	18	16,2	cyclictest	686342	-21	kworker/u16:1+flush-8:0	22:25:08	5
292814	99	18	16,2	cyclictest	673016	-21	kworker/u16:2+flush-8:0	22:05:20	5
292814	99	18	16,2	cyclictest	452450	-21	kworker/u16:3+flush-8:0	21:28:08	5
292814	99	18	16,2	cyclictest	452450	-21	kworker/u16:3+events_unbound	20:57:48	5
292814	99	18	16,2	cyclictest	452450	-21	kworker/u16:3+events_unbound	20:57:48	5
292814	99	18	16,2	cyclictest	403350	-21	kworker/u16:2+events_unbound	20:13:05	5
292814	99	18	16,2	cyclictest	403350	-21	kworker/u16:2+events_unbound	20:13:05	5
292814	99	18	15,2	cyclictest	335118	-21	kworker/u16:1+flush-8:0	19:27:38	5
292810	99	18	14,3	cyclictest	442469	-21	kworker/u16:0+flush-8:0	20:22:58	4
292818	99	17	15,2	cyclictest	854915	-21	kworker/u16:1+events_unbound	23:27:58	6
292818	99	17	15,2	cyclictest	374151	-21	kworker/u16:0+events_unbound	19:48:02	6
292814	99	17	15,2	cyclictest	698890	-21	kworker/u16:4+events_unbound	22:39:16	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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