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 May 18, 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
1716565	2	48	3,39	sleep7	0	-21	swapper/7	07:05:58	7
1716621	2	43	33,7	sleep4	0	-21	swapper/4	07:06:43	4
1716403	2	41	28,9	sleep5	0	-21	swapper/5	07:03:40	5
1716985	99	39	34,4	cyclictest	635	-21	systemd-journal	10:20:03	7
1716975	99	39	37,2	cyclictest	2024819	-21	kworker/u16:4+events_unbound	10:53:04	4
1716975	99	39	37,2	cyclictest	2024819	-21	kworker/u16:4+events_unbound	10:53:04	4
1716979	99	38	36,2	cyclictest	1451199	-21	kworker/u16:0+flush-8:0	07:12:41	5
1716975	99	38	35,3	cyclictest	1749583	-21	kworker/u16:2+flush-8:0	10:37:46	4
1716979	99	37	35,2	cyclictest	1749583	-21	kworker/u16:2+events_unbound	09:23:04	5
1716979	99	36	31,4	cyclictest	1749892	-21	kworker/u16:4+flush-8:0	07:42:47	5
1716985	99	35	32,2	cyclictest	124	-21	kswapd0	11:03:00	7
1716979	99	35	31,3	cyclictest	2231103	-21	pool-/usr/libex	10:58:51	5
1716985	99	34	29,4	cyclictest	2270238	-21	latency_hist	11:17:46	7
1716985	99	34	29,3	cyclictest	2058237	-21	ntpq	09:48:13	7
1716975	99	34	32,2	cyclictest	2353504	-21	kworker/u16:2+flush-8:0	12:12:59	4
1716975	99	33	31,2	cyclictest	1973138	-21	kworker/u16:3+flush-8:0	09:28:01	4
1716985	99	32	27,4	cyclictest	2302100	-21	cut	11:28:07	7
1716983	99	32	30,2	cyclictest	2231435	-21	kworker/u16:6+events_unbound	10:59:29	6
1716985	99	30	26,3	cyclictest	2147431	-21	latency_hist	10:27:46	7
1716983	99	30	27,3	cyclictest	1960155	-21	kworker/u16:0+flush-8:0	09:33:11	6
1716975	99	30	28,2	cyclictest	2221470	-21	kworker/u16:3+flush-8:0	11:08:11	4
1716975	99	30	28,2	cyclictest	1749892	-21	kworker/u16:4+flush-8:0	07:53:01	4
1716650	2	30	20,7	sleep6	0	-21	swapper/6	07:07:10	6
1716985	99	29	28,0	cyclictest	0	-21	swapper/7	09:52:56	7
1716985	99	29	27,1	cyclictest	2048816	-21	ssh	09:47:12	7
1716985	99	28	27,0	cyclictest	0	-21	swapper/7	10:59:03	7
1716985	99	28	27,0	cyclictest	0	-21	swapper/7	10:43:15	7
1716985	99	28	25,2	cyclictest	1999203	-21	runrttasks	09:26:12	7
1716983	99	28	26,2	cyclictest	2353504	-21	kworker/u16:2+flush-8:0	12:03:15	6
1716979	99	28	26,2	cyclictest	2231435	-21	kworker/u16:6+events_unbound	11:48:04	5
1716979	99	28	26,2	cyclictest	1749892	-21	kworker/u16:4+events_unbound	08:13:04	5
1716985	99	27	26,0	cyclictest	0	-21	swapper/7	12:13:05	7
1716985	99	27	26,0	cyclictest	0	-21	swapper/7	09:14:57	7
1716985	99	27	26,0	cyclictest	0	-21	swapper/7	07:18:17	7
1716985	99	27	22,4	cyclictest	635	-21	systemd-journal	07:57:46	7
1716985	99	27	0,25	cyclictest	1893458	-21	latency_hist	08:37:46	7
1716983	99	27	25,2	cyclictest	2231435	-21	kworker/u16:6+flush-8:0	12:23:11	6
1716983	99	27	25,2	cyclictest	2024819	-21	kworker/u16:4+events_unbound	10:18:15	6
1716979	99	27	25,2	cyclictest	1749583	-21	kworker/u16:2+flush-8:0	08:48:07	5
1716975	99	27	25,2	cyclictest	2231435	-21	kworker/u16:6+events_unbound	12:08:10	4
1716985	99	26	0,24	cyclictest	2318219	-21	ssh	11:35:57	7
1716983	99	26	24,2	cyclictest	993476	-21	kworker/u16:1+flush-8:0	07:18:12	6
1716979	99	26	22,3	cyclictest	1749583	-21	kworker/u16:2+flush-8:0	10:28:05	5
1716975	99	26	24,2	cyclictest	1749892	-21	kworker/u16:4+flush-8:0	07:38:10	4
1716979	99	25	23,2	cyclictest	2231435	-21	kworker/u16:6+flush-8:0	12:19:59	5
1716979	99	25	23,2	cyclictest	2024820	-21	kworker/u16:5+flush-8:0	09:42:41	5
1716979	99	25	22,3	cyclictest	2135424	-21	kworker/u16:1+flush-8:0	11:28:15	5
1716975	99	25	23,2	cyclictest	2353504	-21	kworker/u16:2+events_unbound	12:22:59	4
1716975	99	25	23,2	cyclictest	1960155	-21	kworker/u16:0+events_unbound	09:38:01	4
1716985	99	24	23,0	cyclictest	0	-21	swapper/7	12:00:15	7
1716979	99	24	22,2	cyclictest	2024819	-21	kworker/u16:4+flush-8:0	10:13:10	5
1716979	99	24	21,2	cyclictest	1749892	-21	kworker/u16:4+flush-8:0	08:18:02	5
1716975	99	24	22,2	cyclictest	2024820	-21	kworker/u16:5+events_unbound	09:58:01	4
1716975	99	24	22,2	cyclictest	1931599	-21	kworker/u16:1+flush-8:0	08:58:10	4
1716985	99	23	1,21	cyclictest	1263	-21	dockerd	09:35:27	7
1716983	99	23	21,2	cyclictest	2221470	-21	kworker/u16:3+flush-8:0	11:22:59	6
1716983	99	23	21,2	cyclictest	2135424	-21	kworker/u16:1+events_unbound	11:07:59	6
1716983	99	23	21,2	cyclictest	2135424	-21	kworker/u16:1+events_unbound	10:28:13	6
1716979	99	23	21,2	cyclictest	1912718	-21	kworker/u16:4+flush-8:0	09:07:41	5
1716985	99	22	21,0	cyclictest	0	-21	swapper/7	11:49:51	7
1716985	99	22	19,2	cyclictest	2452091	-21	ssh	12:29:07	7
1716975	99	22	20,2	cyclictest	2157231	-21	kworker/u16:0+flush-8:0	10:29:03	4
1716975	99	22	20,2	cyclictest	2024819	-21	kworker/u16:4+events_unbound	10:03:08	4
1716975	99	22	20,2	cyclictest	1874708	-21	kworker/u16:3+flush-8:0	08:28:02	4
1716975	99	22	20,2	cyclictest	1749583	-21	kworker/u16:2+events_unbound	09:18:13	4
1716985	99	21	20,0	cyclictest	0	-21	swapper/7	11:40:23	7
1716983	99	21	18,2	cyclictest	2255647	-21	kworker/u16:0+flush-8:0	11:57:46	6
1716979	99	21	19,2	cyclictest	2135424	-21	kworker/u16:1+flush-8:0	11:18:01	5
1716979	99	21	19,2	cyclictest	1749583	-21	kworker/u16:2+flush-8:0	09:43:18	5
1716975	99	21	19,2	cyclictest	2255647	-21	kworker/u16:0+flush-8:0	11:48:05	4
1716975	99	21	19,2	cyclictest	2221470	-21	kworker/u16:3+flush-8:0	11:23:14	4
1716975	99	21	19,2	cyclictest	2049193	-21	kworker/u16:1+events_unbound	10:08:13	4
1716975	99	21	19,2	cyclictest	1749892	-21	kworker/u16:4+flush-8:0	08:18:14	4
1716975	99	21	19,2	cyclictest	1749583	-21	kworker/u16:2+events_unbound	10:17:41	4
1716975	99	21	19,2	cyclictest	1749583	-21	kworker/u16:2+events_unbound	08:48:09	4
1716985	99	20	19,0	cyclictest	0	-21	swapper/7	08:08:15	7
1716985	99	20	18,1	cyclictest	1951173	-21	diskmemload	11:44:24	7
1716983	99	20	18,2	cyclictest	1787996	-21	kworker/u16:1+flush-8:0	08:17:46	6
1716983	99	20	18,2	cyclictest	1717188	-21	kworker/u16:3+flush-8:0	07:08:13	6
1716983	99	20	18,2	cyclictest	1451199	-21	kworker/u16:0+flush-8:0	07:12:51	6
1716983	99	20	18,2	cyclictest	1451199	-21	kworker/u16:0+flush-8:0	07:12:51	6
1716979	99	20	18,2	cyclictest	2221470	-21	kworker/u16:3+flush-8:0	11:33:08	5
1716979	99	20	18,2	cyclictest	1717188	-21	kworker/u16:3+events_unbound	07:33:00	5
1716979	99	20	18,2	cyclictest	1451199	-21	kworker/u16:0+flush-8:0	07:23:01	5
1716975	99	20	18,2	cyclictest	2024819	-21	kworker/u16:4+events_unbound	10:50:51	4
1716975	99	20	18,2	cyclictest	2024819	-21	kworker/u16:4+events_unbound	10:50:51	4
1716975	99	20	18,2	cyclictest	1787996	-21	kworker/u16:1+events_unbound	07:48:07	4
1716975	99	20	16,3	cyclictest	1451199	-21	kworker/u16:0+flush-8:0	07:13:12	4
1716975	99	20	16,3	cyclictest	1451199	-21	kworker/u16:0+flush-8:0	07:13:12	4
1716985	99	19	18,0	cyclictest	0	-21	swapper/7	10:14:40	7
1716985	99	19	18,0	cyclictest	0	-21	swapper/7	09:39:13	7
1716985	99	19	17,1	cyclictest	0	-21	swapper/7	12:27:27	7
1716985	99	19	16,2	cyclictest	635	-21	systemd-journal	10:28:42	7
1716985	99	19	14,4	cyclictest	635	-21	systemd-journal	08:22:41	7
1716983	99	19	17,2	cyclictest	1973138	-21	kworker/u16:3+events_unbound	09:18:01	6
1716983	99	19	17,2	cyclictest	1874708	-21	kworker/u16:3+flush-8:0	08:43:01	6
1716979	99	19	17,2	cyclictest	1912718	-21	kworker/u16:4+events_unbound	09:08:09	5
1716979	99	19	17,2	cyclictest	1749892	-21	kworker/u16:4+flush-8:0	08:08:12	5
1716975	99	19	17,2	cyclictest	2353504	-21	kworker/u16:2+flush-8:0	12:36:27	4
1716975	99	19	17,2	cyclictest	2231435	-21	kworker/u16:6+events_unbound	12:19:07	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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