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Default latency plot of system in rack #0, slot #5

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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 rack0slot5.osadl.org (updated Tue Jun 23, 2026 00:43:46)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4143350	99	552	28,523	cyclictest	0	-21	swapper/3	22:46:00	9
4143350	99	552	28,523	cyclictest	0	-21	swapper/3	22:46:00	9
4143392	99	545	36,508	cyclictest	0	-21	swapper/13	22:28:00	5
4143392	99	525	21,503	cyclictest	0	-21	swapper/13	23:09:00	5
4143361	99	521	1,519	cyclictest	0	-21	swapper/6	20:26:00	12
4143364	99	512	511,1	cyclictest	4172051	-21	kworker/7:2+i915-unordered	19:40:00	13
4143395	99	503	503,0	cyclictest	4189116	-21	kworker/14:2+i915-unordered	20:26:00	6
4143383	99	484	483,1	cyclictest	102936	-21	kworker/11:1+i915-unordered	22:46:00	3
4143383	99	484	483,1	cyclictest	102936	-21	kworker/11:1+i915-unordered	22:46:00	3
4143375	99	480	27,59	cyclictest	115	-21	ksoftirqd/10	20:11:00	2
4143375	99	474	25,30	cyclictest	0	-21	swapper/10	23:46:23	2
4143387	99	472	26,28	cyclictest	0	-21	swapper/12	19:14:47	4
4143375	99	472	26,29	cyclictest	115	-21	ksoftirqd/10	22:41:00	2
4143375	99	472	24,30	cyclictest	0	-21	swapper/10	22:58:21	2
4143375	99	470	24,30	cyclictest	115	-21	ksoftirqd/10	23:55:00	2
4143392	99	469	19,446	cyclictest	110820	-21	timerwakeupswit	22:22:21	5
4143375	99	469	20,29	cyclictest	0	-21	swapper/10	23:25:23	2
4143387	99	468	22,29	cyclictest	0	-21	swapper/12	19:47:45	4
4143387	99	467	21,30	cyclictest	0	-21	swapper/12	20:24:23	4
4143383	99	467	465,2	cyclictest	0	-21	swapper/11	00:18:00	3
4143375	99	467	21,29	cyclictest	0	-21	swapper/10	21:00:22	2
4143354	99	467	467,0	cyclictest	0	-21	swapper/4	22:59:00	10
4143387	99	466	22,30	cyclictest	0	-21	swapper/12	21:49:21	4
4143364	99	465	18,28	cyclictest	0	-21	swapper/7	21:01:56	13
4143375	99	463	14,446	cyclictest	0	-21	swapper/10	21:42:47	2
4143392	99	462	15,29	cyclictest	0	-21	swapper/13	20:07:21	5
4143387	99	462	23,29	cyclictest	0	-21	swapper/12	00:26:21	4
4143387	99	462	14,30	cyclictest	0	-21	swapper/12	20:15:22	4
4143387	99	462	13,29	cyclictest	0	-21	swapper/12	22:51:21	4
4143387	99	462	13,29	cyclictest	0	-21	swapper/12	22:51:21	4
4143375	99	462	16,29	cyclictest	0	-21	swapper/10	22:04:46	2
4143375	99	462	13,28	cyclictest	0	-21	swapper/10	23:58:44	2
4143354	99	462	462,0	cyclictest	0	-21	swapper/4	20:49:00	10
4143375	99	461	15,28	cyclictest	0	-21	swapper/10	22:16:45	2
4143361	99	461	461,0	cyclictest	0	-21	swapper/6	20:40:00	12
4143387	99	460	0,12	cyclictest	0	-21	swapper/12	00:09:00	4
4143354	99	460	459,1	cyclictest	0	-21	swapper/4	21:46:00	10
4143354	99	460	458,2	cyclictest	2512	-21	kworker/4:1+i915-unordered	20:30:00	10
4143361	99	454	454,0	cyclictest	697	50	irq/159-i915	21:18:00	12
4143398	99	453	452,1	cyclictest	265	50	irq/134-xhci_hcd	21:34:00	7
4143361	99	451	450,1	cyclictest	697	50	irq/159-i915	22:10:00	12
4143383	99	449	449,0	cyclictest	0	-21	swapper/11	20:00:00	3
4143383	99	449	449,0	cyclictest	0	-21	swapper/11	20:00:00	3
4143357	99	449	446,2	cyclictest	69658	-21	kworker/u64:1+events_unbound	23:00:21	11
4143387	99	448	446,2	cyclictest	67742	-21	kworker/12:0+i915-unordered	21:46:00	4
4143383	99	448	26,29	cyclictest	0	-21	swapper/11	00:29:00	3
4143387	99	447	23,28	cyclictest	0	-21	swapper/12	19:20:46	4
4143375	99	447	2,29	cyclictest	0	-21	swapper/10	22:54:23	2
4143375	99	447	2,29	cyclictest	0	-21	swapper/10	22:54:23	2
4143357	99	447	444,2	cyclictest	186234	-21	kworker/u64:4+events_unbound	00:35:23	11
4143395	99	446	444,2	cyclictest	26677	-21	kworker/14:2+pm	20:57:12	6
4143387	99	446	22,30	cyclictest	0	-21	swapper/12	19:22:46	4
4143375	99	446	1,29	cyclictest	0	-21	swapper/10	23:04:23	2
4143361	99	446	446,0	cyclictest	697	50	irq/159-i915	22:59:00	12
4143361	99	446	445,1	cyclictest	697	50	irq/159-i915	21:15:00	12
4143357	99	446	443,2	cyclictest	34640	-21	kworker/u64:8+events_unbound	21:36:46	11
4143398	99	445	444,1	cyclictest	265	50	irq/134-xhci_hcd	22:10:46	7
4143398	99	445	444,1	cyclictest	265	50	irq/134-xhci_hcd	21:46:46	7
4143398	99	445	444,1	cyclictest	265	50	irq/134-xhci_hcd	21:26:42	7
4143375	99	445	0,443	cyclictest	0	-21	swapper/10	23:35:23	2
4143357	99	445	444,1	cyclictest	0	-21	swapper/5	19:46:45	11
4143395	99	444	444,0	cyclictest	22518	-21	kworker/14:1+i915-unordered	20:40:00	6
4143395	99	444	443,1	cyclictest	0	-21	swapper/14	22:32:21	6
4143392	99	444	444,0	cyclictest	0	-21	swapper/13	00:04:21	5
4143392	99	444	443,1	cyclictest	0	-21	swapper/13	00:01:44	5
4143387	99	444	23,419	cyclictest	0	-21	swapper/12	19:31:45	4
4143375	99	444	441,2	cyclictest	4155942	-21	kworker/u64:8+events_unbound	19:36:43	2
4143375	99	444	441,2	cyclictest	2401	-21	kworker/u64:7+events_unbound	20:44:22	2
4143361	99	444	444,0	cyclictest	697	50	irq/159-i915	21:55:00	12
4143357	99	444	444,0	cyclictest	0	-21	swapper/5	22:34:23	11
4143350	99	444	22,421	cyclictest	0	-21	swapper/3	22:47:42	9
4143350	99	444	22,421	cyclictest	0	-21	swapper/3	22:47:42	9
4143350	99	444	22,421	cyclictest	0	-21	swapper/3	00:01:22	9
4143398	99	443	440,1	cyclictest	265	50	irq/134-xhci_hcd	00:25:21	7
4143392	99	443	22,417	cyclictest	0	-21	swapper/13	20:22:21	5
4143387	99	443	21,30	cyclictest	0	-21	swapper/12	23:54:23	4
4143350	99	443	22,421	cyclictest	0	-21	swapper/3	00:05:22	9
4143350	99	443	21,421	cyclictest	0	-21	swapper/3	21:19:21	9
4143392	99	442	442,0	cyclictest	0	-21	swapper/13	23:52:45	5
4143375	99	442	22,418	cyclictest	0	-21	swapper/10	00:24:44	2
4143350	99	442	20,421	cyclictest	0	-21	swapper/3	22:12:44	9
4143350	99	442	20,421	cyclictest	0	-21	swapper/3	00:23:44	9
4143398	99	441	440,1	cyclictest	265	50	irq/134-xhci_hcd	19:54:45	7
4143375	99	441	23,416	cyclictest	0	-21	swapper/10	22:49:23	2
4143375	99	441	23,416	cyclictest	0	-21	swapper/10	22:49:23	2
4143375	99	441	22,417	cyclictest	0	-21	swapper/10	19:58:24	2
4143375	99	441	22,417	cyclictest	0	-21	swapper/10	19:58:24	2
4143375	99	441	21,417	cyclictest	0	-21	swapper/10	22:01:45	2
4143364	99	441	22,416	cyclictest	0	-21	swapper/7	22:51:55	13
4143364	99	441	22,416	cyclictest	0	-21	swapper/7	22:51:55	13
4143350	99	441	21,418	cyclictest	0	-21	swapper/3	22:01:23	9
4143350	99	441	20,420	cyclictest	0	-21	swapper/3	22:22:43	9
4143350	99	441	19,421	cyclictest	0	-21	swapper/3	23:18:45	9
4143350	99	441	18,422	cyclictest	0	-21	swapper/3	22:03:21	9
4143350	99	441	18,422	cyclictest	0	-21	swapper/3	20:16:22	9
4143398	99	440	439,1	cyclictest	265	50	irq/134-xhci_hcd	20:01:45	7
4143398	99	440	439,1	cyclictest	265	50	irq/134-xhci_hcd	20:01:45	7
4143398	99	440	438,1	cyclictest	265	50	irq/134-xhci_hcd	19:30:22	7
4143383	99	440	2,29	cyclictest	0	-21	swapper/11	23:36:56	3
4143350	99	440	19,420	cyclictest	0	-21	swapper/3	23:16:42	9
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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