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 Fri Jun 26, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2556961	99	59	58,1	cyclictest	3126420	-21	kworker/u16:0+flush-8:0	12:04:56	6
2556611	2	55	19,31	sleep7	0	-21	swapper/7	07:08:38	7
2556560	2	49	38,8	sleep4	0	-21	swapper/4	07:07:55	4
3063298	2	46	0,0	sleep7	3063297	-21	ssh	10:56:27	7
2556430	2	40	30,7	sleep5	0	-21	swapper/5	07:06:04	5
2556961	99	39	37,2	cyclictest	2978975	-21	kworker/u16:2+events_unbound	11:40:05	6
2556961	99	39	37,2	cyclictest	2978975	-21	kworker/u16:2+events_unbound	11:40:05	6
2556961	99	37	35,2	cyclictest	2881020	-21	kworker/u16:4+events_unbound	09:58:12	6
2556413	2	37	27,7	sleep6	0	-21	swapper/6	07:05:49	6
2556961	99	36	34,2	cyclictest	3198988	-21	kworker/u16:5+events_unbound	12:02:17	6
2556961	99	36	34,2	cyclictest	3053010	-21	kworker/u16:4+events_unbound	11:47:26	6
2556961	99	36	34,2	cyclictest	2881020	-21	kworker/u16:4+events_unbound	09:53:05	6
2556957	99	36	32,3	cyclictest	2978975	-21	kworker/u16:2+events_unbound	10:39:37	5
2556961	99	35	33,2	cyclictest	3248406	-21	kworker/u16:1+events_unbound	12:22:58	6
2556961	99	35	33,2	cyclictest	3248406	-21	kworker/u16:1+events_unbound	12:22:58	6
2556961	99	35	33,2	cyclictest	3126420	-21	kworker/u16:0+events_unbound	12:31:42	6
2556961	99	35	33,2	cyclictest	3053010	-21	kworker/u16:4+events_unbound	11:12:41	6
2556961	99	35	33,2	cyclictest	2951879	-21	kworker/u16:0+events_unbound	10:52:45	6
2556961	99	35	33,2	cyclictest	2881020	-21	kworker/u16:4+flush-8:0	10:06:21	6
2556961	99	35	33,2	cyclictest	2803695	-21	kworker/u16:5+events_unbound	09:21:25	6
2556961	99	35	33,2	cyclictest	2706994	-21	kworker/u16:1+events_unbound	08:24:54	6
2556961	99	35	33,2	cyclictest	2579962	-21	kworker/u16:2+events_unbound	09:13:05	6
2556961	99	34	32,2	cyclictest	3126420	-21	kworker/u16:0+events_unbound	11:37:01	6
2556961	99	34	32,2	cyclictest	3052659	-21	kworker/u16:3+events_unbound	11:17:42	6
2556961	99	34	32,2	cyclictest	3052659	-21	kworker/u16:3+events_unbound	11:07:50	6
2556961	99	34	32,2	cyclictest	2951879	-21	kworker/u16:0+events_unbound	10:21:58	6
2556961	99	34	32,2	cyclictest	2951879	-21	kworker/u16:0+events_unbound	10:21:58	6
2556961	99	34	32,2	cyclictest	2866458	-21	kworker/u16:2+events_unbound	09:47:05	6
2556961	99	33	31,2	cyclictest	3198988	-21	kworker/u16:5+events_unbound	12:11:05	6
2556961	99	33	31,2	cyclictest	2991211	-21	kworker/u16:5+events_unbound	10:45:25	6
2556961	99	33	31,2	cyclictest	2978975	-21	kworker/u16:2+events_unbound	11:29:06	6
2556961	99	33	31,2	cyclictest	2840558	-21	kworker/u16:3+events_unbound	09:30:30	6
2556961	99	33	31,2	cyclictest	2667107	-21	kworker/u16:0+events_unbound	09:38:57	6
2556957	99	33	32,1	cyclictest	3126420	-21	kworker/u16:0+flush-8:0	12:29:22	5
2556961	99	32	30,2	cyclictest	3126420	-21	kworker/u16:0+events_unbound	12:16:16	6
2556961	99	32	30,2	cyclictest	3053010	-21	kworker/u16:4+flush-8:0	11:30:17	6
2556961	99	32	30,2	cyclictest	3052659	-21	kworker/u16:3+events_unbound	10:59:02	6
2556961	99	32	30,2	cyclictest	2951879	-21	kworker/u16:0+events_unbound	10:44:21	6
2556961	99	32	30,2	cyclictest	2840558	-21	kworker/u16:3+events_unbound	10:32:14	6
2556961	99	32	30,2	cyclictest	2667107	-21	kworker/u16:0+events_unbound	09:28:57	6
2556961	99	31	29,2	cyclictest	3248406	-21	kworker/u16:1+events_unbound	12:25:09	6
2556961	99	31	29,2	cyclictest	3186853	-21	kworker/u16:1+events_unbound	11:53:49	6
2556961	99	31	29,2	cyclictest	3126420	-21	kworker/u16:0+events_unbound	11:57:44	6
2556961	99	31	29,2	cyclictest	2951879	-21	kworker/u16:0+events_unbound	10:35:25	6
2556961	99	31	28,2	cyclictest	2667107	-21	kworker/u16:0+events_unbound	08:04:33	6
2556966	99	30	28,1	cyclictest	2959400	-21	ssh	10:14:42	7
2556961	99	30	28,2	cyclictest	2840558	-21	kworker/u16:3+events_unbound	10:17:09	6
2556961	99	30	28,2	cyclictest	2579963	-21	kworker/u16:5+events_unbound	07:30:46	6
2556961	99	30	28,2	cyclictest	2579962	-21	kworker/u16:2+events_unbound	08:53:21	6
2556961	99	29	27,2	cyclictest	2881020	-21	kworker/u16:4+events_unbound	10:02:37	6
2556961	99	29	27,2	cyclictest	2579963	-21	kworker/u16:5+events_unbound	08:21:45	6
2556966	99	28	27,0	cyclictest	0	-21	swapper/7	12:14:48	7
2556961	99	28	26,2	cyclictest	3248406	-21	kworker/u16:1+events_unbound	12:35:58	6
2556961	99	28	26,2	cyclictest	2856416	-21	kworker/u16:1+events_unbound	09:40:26	6
2556961	99	28	26,2	cyclictest	2579963	-21	kworker/u16:5+events_unbound	07:37:33	6
2556966	99	27	26,0	cyclictest	0	-21	swapper/7	10:07:21	7
2556961	99	27	25,2	cyclictest	2667107	-21	kworker/u16:0+events_unbound	09:16:40	6
2556961	99	27	25,2	cyclictest	2667107	-21	kworker/u16:0+events_unbound	09:01:25	6
2556961	99	27	25,2	cyclictest	2667107	-21	kworker/u16:0+events_unbound	09:01:25	6
2556961	99	26	24,2	cyclictest	3052659	-21	kworker/u16:3+events_unbound	11:20:59	6
2556961	99	26	24,2	cyclictest	3052658	-21	kworker/u16:1+flush-8:0	11:02:39	6
2556961	99	26	24,2	cyclictest	3052658	-21	kworker/u16:1+flush-8:0	11:02:39	6
2556961	99	26	24,2	cyclictest	2951879	-21	kworker/u16:0+events_unbound	10:27:07	6
2556961	99	26	24,2	cyclictest	2881020	-21	kworker/u16:4+events_unbound	10:10:56	6
2556961	99	26	24,2	cyclictest	2756782	-21	kworker/u16:1+events_unbound	08:56:46	6
2556961	99	25	23,2	cyclictest	2647414	-21	kworker/u16:3+events_unbound	07:52:46	6
2556961	99	25	23,2	cyclictest	2627986	-21	kworker/u16:0+events_unbound	07:45:14	6
2556957	99	25	22,2	cyclictest	3053010	-21	kworker/u16:4+flush-8:0	11:29:41	5
3029192	2	24	0,1	chrt	0	-21	swapper/4	10:44:38	4
2556966	99	24	22,1	cyclictest	3282367	-21	ssh	12:24:52	7
2556966	99	24	0,22	cyclictest	3052617	-21	latency_hist	10:54:23	7
2556961	99	24	22,2	cyclictest	2579963	-21	kworker/u16:5+events_unbound	07:42:46	6
2556961	99	24	22,2	cyclictest	2540322	-21	kworker/u16:0+events_unbound	07:11:47	6
2556966	99	23	22,0	cyclictest	0	-21	swapper/7	09:34:45	7
2556966	99	23	20,2	cyclictest	3233257	-21	dnf	12:04:56	7
2556961	99	23	21,2	cyclictest	2726365	-21	kworker/u16:3+events_unbound	08:35:30	6
2556961	99	23	21,2	cyclictest	2579962	-21	kworker/u16:2+events_unbound	08:32:47	6
2556961	99	23	21,2	cyclictest	2579962	-21	kworker/u16:2+events_unbound	07:55:47	6
2556957	99	23	19,3	cyclictest	3052659	-21	kworker/u16:3+events_unbound	11:19:37	5
2556966	99	21	18,2	cyclictest	3199323	-21	ssh	11:54:26	7
2556957	99	21	19,2	cyclictest	3053010	-21	kworker/u16:4+flush-8:0	12:05:51	5
2556966	99	20	18,1	cyclictest	2794467	-21	diskmemload	11:11:33	7
2556966	99	20	18,1	cyclictest	0	-21	swapper/7	09:19:42	7
2556966	99	20	0,19	cyclictest	2915225	-21	ssh	09:55:33	7
2556966	99	20	0,18	cyclictest	3039901	-21	sh	10:48:33	7
2556961	99	20	19,1	cyclictest	2667107	-21	kworker/u16:0+events_unbound	08:04:23	6
2556966	99	19	18,0	cyclictest	0	-21	swapper/7	11:14:39	7
2556966	99	19	17,1	cyclictest	3016308	-21	ssh	10:39:34	7
2556966	99	19	17,1	cyclictest	2794467	-21	diskmemload	11:19:54	7
2556966	99	19	17,1	cyclictest	2784891	-21	cat	09:04:23	7
2556966	99	19	17,1	cyclictest	2784891	-21	cat	09:04:23	7
2556961	99	19	17,2	cyclictest	2667107	-21	kworker/u16:0+events_unbound	08:48:37	6
2556961	99	19	17,2	cyclictest	2579962	-21	kworker/u16:2+flush-8:0	07:16:54	6
2556966	99	18	17,0	cyclictest	0	-21	swapper/7	11:29:33	7
2556966	99	18	17,0	cyclictest	0	-21	swapper/7	08:14:51	7
2556966	99	18	15,1	cyclictest	2794467	-21	diskmemload	10:01:30	7
2556966	99	18	0,16	cyclictest	2902036	-21	ssh	09:49:48	7
2556966	99	18	0,16	cyclictest	0	-21	swapper/7	07:16:46	7
2556961	99	18	16,2	cyclictest	2579963	-21	kworker/u16:5+events_unbound	08:18:22	6
2556961	99	18	16,2	cyclictest	2579962	-21	kworker/u16:2+events_unbound	07:28:22	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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