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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 Wed Feb 11, 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
3005225	2	102	0,0	sleep5	0	-21	swapper/5	11:01:14	5
2480533	2	54	20,29	sleep7	0	-21	swapper/7	07:03:42	7
2480968	99	44	40,3	cyclictest	2513718	-21	kworker/u16:3+flush-8:0	07:28:08	6
2480967	99	44	42,2	cyclictest	3133097	-21	kworker/u16:3+flush-8:0	12:31:23	5
2480967	99	43	41,2	cyclictest	3096090	-21	kworker/u16:3+events_unbound	11:41:19	5
2480406	2	42	32,7	sleep4	0	-21	swapper/4	07:01:54	4
2480973	99	41	36,4	cyclictest	650	-21	systemd-journal	10:15:53	7
2480967	99	41	39,2	cyclictest	2963427	-21	kworker/u16:0+events_unbound	11:21:17	5
2471474	2	41	29,8	sleep5	0	-21	swapper/5	07:00:59	5
2480967	99	40	38,2	cyclictest	2963427	-21	kworker/u16:0+flush-8:0	11:16:15	5
2480973	99	39	0,38	cyclictest	6471	-21	gnome-software	07:28:08	7
2480967	99	39	37,2	cyclictest	2581590	-21	kworker/u16:0+events_unbound	09:31:45	5
2480967	99	38	36,2	cyclictest	2697629	-21	kworker/u16:1+events_unbound	10:23:01	5
2480967	99	38	36,2	cyclictest	2697629	-21	kworker/u16:1+events_unbound	10:23:01	5
2480597	2	38	16,7	sleep6	0	-21	swapper/6	07:04:37	6
2480967	99	37	35,2	cyclictest	2826361	-21	kworker/u16:3+events_unbound	09:49:36	5
2480967	99	36	34,2	cyclictest	2581590	-21	kworker/u16:0+events_unbound	09:37:25	5
2480967	99	36	33,2	cyclictest	2471476	-21	kworker/u16:3+events_unbound	07:05:57	5
2480967	99	35	33,2	cyclictest	2697629	-21	kworker/u16:1+events_unbound	10:29:04	5
2480963	99	35	32,2	cyclictest	2581590	-21	kworker/u16:0+flush-8:0	08:46:25	4
2480967	99	34	32,2	cyclictest	3133097	-21	kworker/u16:3+events_unbound	11:51:56	5
2480967	99	34	32,2	cyclictest	2864968	-21	kworker/u16:2+events_unbound	11:30:20	5
2480967	99	33	31,2	cyclictest	3133097	-21	kworker/u16:3+events_unbound	12:20:38	5
2480967	99	33	31,2	cyclictest	2963427	-21	kworker/u16:0+events_unbound	10:50:20	5
2480967	99	33	31,2	cyclictest	2901701	-21	kworker/u16:3+flush-8:0	10:41:29	5
2480967	99	33	31,2	cyclictest	2864968	-21	kworker/u16:2+events_unbound	12:30:38	5
2480967	99	33	31,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	07:43:50	5
2480967	99	32	30,2	cyclictest	2864968	-21	kworker/u16:2+events_unbound	11:45:56	5
2480967	99	32	30,2	cyclictest	2864968	-21	kworker/u16:2+events_unbound	11:10:38	5
2480967	99	32	29,2	cyclictest	2864968	-21	kworker/u16:2+events_unbound	11:56:12	5
2480973	99	31	26,4	cyclictest	2926224	-21	latency_hist	10:30:54	7
2480967	99	31	29,2	cyclictest	2864968	-21	kworker/u16:2+events_unbound	10:37:30	5
2480967	99	30	28,2	cyclictest	967783	-21	kworker/u16:0+events_unbound	07:20:04	5
2480967	99	30	28,2	cyclictest	3172828	-21	kworker/u16:4+flush-8:0	12:11:26	5
2480967	99	30	28,2	cyclictest	3133097	-21	kworker/u16:3+events_unbound	12:24:58	5
2480967	99	30	28,2	cyclictest	3133097	-21	kworker/u16:3+events_unbound	12:08:03	5
2480967	99	30	28,2	cyclictest	2963427	-21	kworker/u16:0+events_unbound	10:51:39	5
2480967	99	30	28,2	cyclictest	2864968	-21	kworker/u16:2+events_unbound	11:37:34	5
2480967	99	30	28,2	cyclictest	2826361	-21	kworker/u16:3+events_unbound	10:03:24	5
2480967	99	30	28,2	cyclictest	2697629	-21	kworker/u16:1+flush-8:0	09:55:49	5
2480967	99	30	28,2	cyclictest	2697629	-21	kworker/u16:1+events_unbound	10:33:30	5
2480967	99	30	28,2	cyclictest	2697629	-21	kworker/u16:1+events_unbound	09:42:22	5
2480967	99	30	28,2	cyclictest	2697629	-21	kworker/u16:1+events_unbound	09:42:22	5
2480967	99	30	28,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	08:23:13	5
2480967	99	30	28,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	07:50:05	5
2480967	99	30	28,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	07:34:25	5
2480967	99	30	28,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	07:34:25	5
2480967	99	30	28,2	cyclictest	2488834	-21	kworker/u16:4+events_unbound	08:00:56	5
2480967	99	30	27,2	cyclictest	2488834	-21	kworker/u16:4+events_unbound	08:25:55	5
3124462	2	29	0,1	chrt	0	-21	swapper/6	11:51:08	6
3086489	2	29	0,1	chrt	3086490	-21	latency_hist	11:35:54	7
2480973	99	29	24,4	cyclictest	650	-21	systemd-journal	07:40:54	7
2480973	99	29	24,4	cyclictest	650	-21	systemd-journal	07:33:30	7
2480973	99	29	24,4	cyclictest	650	-21	systemd-journal	07:33:30	7
2480968	99	29	27,2	cyclictest	2864968	-21	kworker/u16:2+events_unbound	10:16:08	6
2480968	99	29	27,2	cyclictest	2738987	-21	kworker/u16:2+events_unbound	09:41:21	6
2480968	99	29	27,2	cyclictest	2738987	-21	kworker/u16:2+events_unbound	09:41:21	6
2480967	99	29	27,2	cyclictest	3133097	-21	kworker/u16:3+events_unbound	12:03:22	5
2480967	99	29	27,2	cyclictest	2963427	-21	kworker/u16:0+flush-8:0	11:31:55	5
2480967	99	29	27,2	cyclictest	2963427	-21	kworker/u16:0+events_unbound	11:13:44	5
2480967	99	29	27,2	cyclictest	2839460	-21	kworker/u16:0+events_unbound	10:11:52	5
2480967	99	29	27,2	cyclictest	2581590	-21	kworker/u16:0+events_unbound	08:39:01	5
2480967	99	29	27,2	cyclictest	2581590	-21	kworker/u16:0+events_unbound	08:12:01	5
2480967	99	29	27,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	07:52:14	5
2480967	99	29	26,2	cyclictest	2581590	-21	kworker/u16:0+events_unbound	09:15:55	5
2480967	99	28	26,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	07:38:24	5
2480973	99	27	25,1	cyclictest	2779616	-21	ssh	09:31:08	7
2480967	99	27	25,2	cyclictest	2697629	-21	kworker/u16:1+events_unbound	10:07:27	5
2480967	99	27	25,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	08:32:10	5
2480967	99	27	25,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	08:20:21	5
2480967	99	27	25,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	08:20:21	5
2480967	99	27	25,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	08:08:24	5
2480973	99	26	22,3	cyclictest	2987847	-21	basename	10:55:54	7
2480967	99	26	24,2	cyclictest	2697629	-21	kworker/u16:1+flush-8:0	09:06:42	5
2480967	99	26	24,2	cyclictest	2532864	-21	kworker/u16:2+flush-8:0	08:56:04	5
2480967	99	26	24,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	08:55:14	5
2480973	99	25	20,4	cyclictest	2687808	-21	latency_hist	08:50:54	7
2480968	99	25	23,2	cyclictest	2738987	-21	kworker/u16:2+events_unbound	09:36:18	6
2480968	99	25	21,3	cyclictest	2488834	-21	kworker/u16:4+flush-8:0	07:16:06	6
2480967	99	25	23,2	cyclictest	967783	-21	kworker/u16:0+events_unbound	07:13:17	5
2480967	99	25	23,2	cyclictest	2864968	-21	kworker/u16:2+events_unbound	10:56:20	5
2480967	99	25	23,2	cyclictest	2581590	-21	kworker/u16:0+events_unbound	08:42:26	5
2480967	99	25	23,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	07:28:45	5
2480967	99	25	23,2	cyclictest	2481190	-21	kworker/u16:1+flush-8:0	07:22:30	5
2480973	99	24	19,4	cyclictest	2839931	-21	latency_hist	09:55:54	7
2480967	99	24	22,2	cyclictest	2532864	-21	kworker/u16:2+events_unbound	07:59:09	5
2480967	99	23	21,2	cyclictest	2697629	-21	kworker/u16:1+flush-8:0	09:57:10	5
2480973	99	22	21,1	cyclictest	2750604	-21	ssh	09:16:19	7
2480967	99	22	20,2	cyclictest	2488834	-21	kworker/u16:4+events_unbound	08:49:57	5
2480963	99	22	19,2	cyclictest	2826361	-21	kworker/u16:3+flush-8:0	09:51:10	4
2480973	99	21	16,4	cyclictest	3025448	-21	grep	11:11:04	7
2480973	99	21	0,20	cyclictest	2766195	-21	sed	09:25:54	7
2480967	99	21	19,2	cyclictest	2864968	-21	kworker/u16:2+events_unbound	10:18:15	5
2480967	99	20	18,2	cyclictest	2697629	-21	kworker/u16:1+events_unbound	09:02:57	5
2480973	99	18	16,1	cyclictest	0	-21	swapper/7	10:06:18	7
2480973	99	18	15,2	cyclictest	3049444	-21	latency_hist	11:20:54	7
2480973	99	18	12,5	cyclictest	2649243	-21	latency_hist	08:30:54	7
2480973	99	17	16,0	cyclictest	0	-21	swapper/7	07:41:06	7
2480973	99	17	13,3	cyclictest	1267	-21	snmpd	11:24:35	7
2480973	99	17	0,16	cyclictest	650	-21	systemd-journal	08:05:53	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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