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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 50 highest latencies:

System rack0slot2.osadl.org (updated Wed Dec 03, 2025 00:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2259012	2	68	57,7	sleep4	0	-21	swapper/4	03:19:35	4
2259249	2	63	36,8	sleep5	0	-21	swapper/5	03:22:49	5
2259220	2	53	29,8	sleep6	0	-21	swapper/6	03:22:26	6
2259617	99	50	47,2	cyclictest	2857925	-21	kworker/u16:3+flush-8:0	08:22:49	5
2259617	99	50	47,2	cyclictest	2283241	-21	kworker/u16:2+flush-8:0	03:37:49	5
2259617	99	49	47,2	cyclictest	2757165	-21	kworker/u16:1+events_unbound	07:43:12	5
2259624	99	47	0,45	cyclictest	1021	-21	rs:main		7
2259624	99	46	41,4	cyclictest	2269547	-21	latency_hist	03:27:49	7
2259617	99	46	42,3	cyclictest	2384215	-21	kworker/u16:1+flush-8:0	04:47:49	5
2259015	2	45	11,30	sleep7	0	-21	swapper/7	03:19:38	7
2259624	99	43	37,5	cyclictest	976	-21	in:imjournal	08:12:49	7
2259617	99	38	36,2	cyclictest	2485049	-21	kworker/u16:4+flush-8:0	05:22:49	5
2259621	99	37	35,2	cyclictest	2837898	-21	kworker/u16:1+flush-8:0	08:42:12	6
2259624	99	36	31,4	cyclictest	2394326	-21	latency_hist	04:27:49	7
2259612	99	36	34,2	cyclictest	2544700	-21	kworker/u16:1+flush-8:0	05:58:05	4
2259621	99	35	33,2	cyclictest	2293384	-21	kworker/u16:4+flush-8:0	04:39:11	6
2259624	99	34	29,4	cyclictest	589235	-21	systemd-journal	08:47:48	7
2259624	99	34	29,4	cyclictest	2757272	-21	latency_hist	07:27:49	7
2259621	99	34	32,2	cyclictest	2908408	-21	kworker/u16:0+flush-8:0	08:44:28	6
2259621	99	34	32,2	cyclictest	2596146	-21	kworker/u16:1+events_unbound	06:45:13	6
2259621	99	34	32,2	cyclictest	2596146	-21	kworker/u16:1+events_unbound	06:45:13	6
2259612	99	34	30,3	cyclictest	2384215	-21	kworker/u16:1+flush-8:0	05:03:20	4
2259621	99	33	31,2	cyclictest	2837898	-21	kworker/u16:1+events_unbound	08:16:52	6
2259621	99	33	31,2	cyclictest	2837898	-21	kworker/u16:1+events_unbound	08:16:52	6
2259621	99	33	31,2	cyclictest	2817440	-21	kworker/u16:0+events_unbound	08:23:13	6
2259621	99	33	31,2	cyclictest	2439174	-21	kworker/u16:2+events_unbound	05:44:05	6
2259621	99	33	31,2	cyclictest	2439174	-21	kworker/u16:2+events_unbound	05:11:50	6
2259621	99	33	31,2	cyclictest	2439174	-21	kworker/u16:2+events_unbound	04:56:49	6
2259621	99	33	30,2	cyclictest	2293384	-21	kworker/u16:4+flush-8:0	04:42:57	6
2259617	99	33	30,2	cyclictest	2439174	-21	kworker/u16:2+events_unbound	05:33:04	5
2259621	99	32	30,2	cyclictest	2596146	-21	kworker/u16:1+events_unbound	06:40:49	6
2259621	99	32	30,2	cyclictest	2544700	-21	kworker/u16:1+events_unbound	06:00:40	6
2259621	99	32	30,2	cyclictest	2485049	-21	kworker/u16:4+events_unbound	05:32:00	6
2259617	99	32	30,2	cyclictest	2827775	-21	kworker/u16:2+events_unbound	08:03:12	5
2259617	99	32	30,2	cyclictest	2596146	-21	kworker/u16:1+flush-8:0	06:28:13	5
2259617	99	32	30,2	cyclictest	2183596	-21	kworker/u16:1+flush-8:0	03:28:18	5
2259621	99	31	29,2	cyclictest	2334319	-21	kworker/u16:0+events_unbound	04:14:13	6
2259621	99	31	29,2	cyclictest	2283241	-21	kworker/u16:2+flush-8:0	03:34:10	6
2259621	99	31	29,2	cyclictest	2283241	-21	kworker/u16:2+events_unbound	04:04:50	6
2259621	99	31	28,2	cyclictest	2596146	-21	kworker/u16:1+events_unbound	06:52:50	6
2259617	99	31	27,3	cyclictest	2596146	-21	kworker/u16:1+events_unbound	07:03:04	5
2259624	99	30	25,4	cyclictest	2908517	-21	latency_hist	08:42:49	7
2259621	99	30	28,2	cyclictest	2827775	-21	kworker/u16:2+flush-8:0	08:11:12	6
2259621	99	30	28,2	cyclictest	2787656	-21	kworker/u16:4+events_unbound	08:36:01	6
2259621	99	30	28,2	cyclictest	2726791	-21	kworker/u16:3+flush-8:0	07:14:16	6
2259621	99	30	28,2	cyclictest	2726791	-21	kworker/u16:3+flush-8:0	07:10:12	6
2259621	99	30	28,2	cyclictest	2596346	-21	kworker/u16:4+events_unbound	06:29:00	6
2259621	99	30	28,2	cyclictest	2485049	-21	kworker/u16:4+flush-8:0	05:21:50	6
2259621	99	30	28,2	cyclictest	2485049	-21	kworker/u16:4+events_unbound	05:54:09	6
2259621	99	30	28,2	cyclictest	2183596	-21	kworker/u16:1+flush-8:0	03:28:13	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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