OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #f, 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.

Total number of samples: 100 million
Resolution of latency scale: reduced

Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system

Characteristics of the 792 highest latencies:

System rackfslot5.osadl.org (updated Thu Apr 30, 2026 06:46:00)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
6819	99	748	738,5	cyclictest	0	-21	swapper/1	06:08:14	1
6820	99	738	725,8	cyclictest	0	-21	swapper/2	05:24:21	2
6820	99	730	717,8	cyclictest	0	-21	swapper/2	05:35:19	2
6820	99	730	717,8	cyclictest	0	-21	swapper/2	05:35:19	2
6820	99	730	717,8	cyclictest	0	-21	swapper/2	05:35:19	2
6820	99	715	703,7	cyclictest	0	-21	swapper/2	06:30:10	2
6820	99	714	702,7	cyclictest	0	-21	swapper/2	05:13:23	2
6820	99	706	690,10	cyclictest	0	-21	swapper/2	05:57:16	2
6820	99	706	690,10	cyclictest	0	-21	swapper/2	05:57:15	2
6820	99	698	686,7	cyclictest	0	-21	swapper/2	06:19:12	2
6818	99	694	670,18	cyclictest	25545	-21	kworker/0:4+events_freezable_power_	05:24:21	0
6821	99	689	678,5	cyclictest	0	-21	swapper/3	05:24:21	3
6818	99	686	662,19	cyclictest	9740	-21	kworker/0:5+events_freezable_power_	05:35:19	0
6818	99	686	662,19	cyclictest	9740	-21	kworker/0:5+events_freezable_power_	05:35:19	0
6818	99	686	662,19	cyclictest	9740	-21	kworker/0:5+events_freezable_power_	05:35:19	0
6821	99	681	670,5	cyclictest	0	-21	swapper/3	05:35:20	3
6821	99	681	670,5	cyclictest	0	-21	swapper/3	05:35:19	3
6821	99	681	670,5	cyclictest	0	-21	swapper/3	05:35:19	3
6820	99	670	657,8	cyclictest	0	-21	swapper/2	05:46:17	2
6820	99	670	657,8	cyclictest	0	-21	swapper/2	05:46:17	2
6818	99	670	649,16	cyclictest	8233	-21	kworker/0:0+events_freezable_power_	06:30:11	0
6818	99	670	648,17	cyclictest	820	-21	kworker/0:1+events_freezable_power_	05:13:23	0
6818	99	670	635,29	cyclictest	9740	-21	kworker/0:5+events_freezable_power_	05:57:15	0
6818	99	670	635,29	cyclictest	9740	-21	kworker/0:5+events_freezable_power_	05:57:15	0
6821	99	667	657,5	cyclictest	0	-21	swapper/3	06:30:10	3
6821	99	666	656,5	cyclictest	0	-21	swapper/3	05:13:23	3
6821	99	657	643,7	cyclictest	0	-21	swapper/3	05:57:15	3
6821	99	657	643,7	cyclictest	0	-21	swapper/3	05:57:15	3
6818	99	653	632,16	cyclictest	1120	-21	kworker/0:6+events_freezable_power_	06:19:12	0
6821	99	650	640,5	cyclictest	0	-21	swapper/3	06:19:12	3
6820	99	644	636,3	cyclictest	0	-21	swapper/2	06:08:14	2
6819	99	642	626,9	cyclictest	0	-21	swapper/1	05:24:21	1
6819	99	633	618,8	cyclictest	0	-21	swapper/1	05:35:19	1
6819	99	633	618,8	cyclictest	0	-21	swapper/1	05:35:19	1
6819	99	633	618,8	cyclictest	0	-21	swapper/1	05:35:19	1
6818	99	632	603,24	cyclictest	9740	-21	kworker/0:5+events_freezable_power_	05:46:18	0
6818	99	632	603,24	cyclictest	9740	-21	kworker/0:5+events_freezable_power_	05:46:17	0
6821	99	622	611,5	cyclictest	0	-21	swapper/3	05:46:17	3
6821	99	622	611,5	cyclictest	0	-21	swapper/3	05:46:17	3
6819	99	619	605,7	cyclictest	0	-21	swapper/1	06:30:10	1
6819	99	618	604,7	cyclictest	0	-21	swapper/1	05:13:23	1
6818	99	607	582,5	cyclictest	5835	-21	kworker/0:3+events_freezable_power_	06:08:14	0
6819	99	602	588,8	cyclictest	0	-21	swapper/1	06:19:13	1
6819	99	601	591,5	cyclictest	0	-21	swapper/1	05:57:15	1
6819	99	601	591,5	cyclictest	0	-21	swapper/1	05:57:15	1
6821	99	600	590,5	cyclictest	0	-21	swapper/3	06:08:14	3
6819	99	569	559,5	cyclictest	0	-21	swapper/1	05:46:17	1
6819	99	569	559,5	cyclictest	0	-21	swapper/1	05:46:17	1
6818	99	58	5,50	cyclictest	11988	-21	gltestperf	05:30:26	0
6818	99	58	1,44	cyclictest	7508	-21	ntpq	05:05:35	0
6818	99	58	1,44	cyclictest	7508	-21	ntpq	05:05:35	0
6818	99	57	2,6	cyclictest	25559	-21	grep	05:41:30	0
6818	99	57	2,6	cyclictest	25559	-21	grep	05:41:30	0
6818	99	57	1,52	cyclictest	16874	-21	looper	06:12:31	0
6818	99	57	1,52	cyclictest	16874	-21	looper	06:12:31	0
6818	99	55	0,42	cyclictest	32006	-21	sshd	06:00:47	0
6818	99	54	24,27	cyclictest	94	50	irq/76-5b050000.ethernet	05:15:24	0
6818	99	54	24,27	cyclictest	94	50	irq/76-5b050000.ethernet	05:15:24	0
6818	99	53	2,5	cyclictest	7400	-21	ntpq	06:20:38	0
6818	99	53	1,39	cyclictest	8204	-21	df_abs	06:25:17	0
6818	99	52	0,39	cyclictest	11430	-21	fstime	05:27:55	0
6818	99	52	0,39	cyclictest	11430	-21	fstime	05:27:55	0
6818	99	52	0,38	cyclictest	10929	-21	cat	06:35:24	0
6818	99	51	25,23	cyclictest	94	50	irq/76-5b050000.ethernet	05:52:57	0
6818	99	51	25,23	cyclictest	94	50	irq/76-5b050000.ethernet	05:52:57	0
6818	99	49	1,16	cyclictest	6799	-21	latency_hist	05:05:02	0
6818	99	49	1,16	cyclictest	6799	-21	latency_hist	05:05:02	0
6820	99	46	2,5	cyclictest	0	-21	swapper/2	06:04:27	2
6819	99	46	2,5	cyclictest	0	-21	swapper/1	06:02:57	1
6819	99	45	2,39	cyclictest	0	-21	swapper/1	06:14:49	1
6819	99	45	2,39	cyclictest	0	-21	swapper/1	06:14:48	1
6819	99	44	2,5	cyclictest	0	-21	swapper/1	06:20:48	1
6819	99	44	2,5	cyclictest	0	-21	swapper/1	05:43:56	1
6819	99	44	2,5	cyclictest	0	-21	swapper/1	05:43:56	1
6819	99	44	2,5	cyclictest	0	-21	swapper/1	05:27:56	1
6819	99	44	2,5	cyclictest	0	-21	swapper/1	05:27:56	1
6819	99	44	2,38	cyclictest	0	-21	swapper/1	05:05:37	1
6819	99	44	2,38	cyclictest	0	-21	swapper/1	05:05:37	1
6819	99	43	2,5	cyclictest	0	-21	swapper/1	05:50:47	1
6819	99	43	2,5	cyclictest	0	-21	swapper/1	05:50:46	1
6819	99	43	2,5	cyclictest	0	-21	swapper/1	05:35:04	1
6821	99	42	25,10	cyclictest	0	-21	swapper/3	06:20:26	3
6819	99	42	2,36	cyclictest	0	-21	swapper/1	06:30:01	1
6819	99	42	1,5	cyclictest	0	-21	swapper/1	06:40:02	1
6821	99	41	28,8	cyclictest	0	-21	swapper/3	05:30:33	3
6820	99	41	2,5	cyclictest	0	-21	swapper/2	05:31:30	2
6820	99	41	2,5	cyclictest	0	-21	swapper/2	05:05:54	2
6820	99	41	2,5	cyclictest	0	-21	swapper/2	05:05:54	2
6820	99	41	1,5	cyclictest	0	-21	swapper/2	06:22:06	2
6821	99	40	27,8	cyclictest	0	-21	swapper/3	06:11:31	3
6821	99	40	27,8	cyclictest	0	-21	swapper/3	06:11:30	3
6821	99	40	26,8	cyclictest	0	-21	swapper/3	06:25:37	3
6820	99	40	2,5	cyclictest	0	-21	swapper/2	06:25:44	2
6820	99	40	2,5	cyclictest	0	-21	swapper/2	06:10:55	2
6820	99	40	2,5	cyclictest	0	-21	swapper/2	06:10:55	2
6820	99	39	1,5	cyclictest	0	-21	swapper/2	06:38:19	2
6820	99	39	1,5	cyclictest	0	-21	swapper/2	05:28:47	2
6820	99	39	1,5	cyclictest	0	-21	swapper/2	05:28:46	2
6819	99	39	1,12	cyclictest	30	1	ktimers/1	05:16:13	1
6819	99	39	1,12	cyclictest	30	1	ktimers/1	05:16:13	1
6820	99	38	2,5	cyclictest	0	-21	swapper/2	05:40:24	2
6820	99	38	2,5	cyclictest	0	-21	swapper/2	05:40:23	2
6821	99	36	27,5	cyclictest	0	-21	swapper/3	06:35:54	3
6821	99	36	27,5	cyclictest	0	-21	swapper/3	05:42:06	3
6821	99	36	27,5	cyclictest	0	-21	swapper/3	05:42:06	3
6821	99	36	27,5	cyclictest	0	-21	swapper/3	05:05:25	3
6821	99	36	27,5	cyclictest	0	-21	swapper/3	05:05:25	3
6820	99	36	2,5	cyclictest	0	-21	swapper/2	05:54:52	2
6820	99	36	2,5	cyclictest	0	-21	swapper/2	05:54:52	2
6820	99	36	2,30	cyclictest	0	-21	swapper/2	05:17:19	2
6820	99	36	2,30	cyclictest	0	-21	swapper/2	05:17:19	2
6821	99	35	26,5	cyclictest	0	-21	swapper/3	06:00:39	3
6821	99	35	26,5	cyclictest	0	-21	swapper/3	05:25:12	3
6821	99	35	26,5	cyclictest	0	-21	swapper/3	05:25:12	3
6821	99	34	25,5	cyclictest	0	-21	swapper/3	05:15:16	3
6821	99	34	25,5	cyclictest	0	-21	swapper/3	05:15:15	3
6821	99	33	24,5	cyclictest	0	-21	swapper/3	05:50:32	3
6821	99	33	24,5	cyclictest	0	-21	swapper/3	05:50:31	3
6819	99	30	4,12	cyclictest	30	1	ktimers/1	05:05:02	1
6819	99	30	4,12	cyclictest	30	1	ktimers/1	05:05:02	1
6820	99	27	2,14	cyclictest	0	-21	swapper/2	05:05:01	2
6820	99	27	2,14	cyclictest	0	-21	swapper/2	05:05:01	2
6821	99	26	17,5	cyclictest	0	-21	swapper/3	05:05:00	3
6821	99	26	17,5	cyclictest	0	-21	swapper/3	05:05:00	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2025-04-16 - 17:23