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 Sun May 03, 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
3032659	2	58	47,7	sleep4	0	-21	swapper/4	07:03:53	4
3041504	2	55	45,7	sleep5	0	-21	swapper/5	07:04:50	5
3042074	99	52	48,3	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	11:38:45	6
3042074	99	52	48,3	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	11:38:45	6
3042066	99	43	41,2	cyclictest	3626738	-21	kworker/u16:1+flush-8:0	11:54:16	4
3042066	99	42	40,2	cyclictest	3494213	-21	kworker/u16:4+events_unbound	11:16:01	4
3042066	99	41	39,2	cyclictest	3494213	-21	kworker/u16:4+flush-8:0	11:34:45	4
3042066	99	41	39,2	cyclictest	3494213	-21	kworker/u16:4+flush-8:0	11:34:45	4
3041553	2	41	7,29	sleep7	0	-21	swapper/7	07:05:33	7
3042066	99	39	37,2	cyclictest	3493917	-21	kworker/u16:3+flush-8:0	10:50:53	4
3042066	99	38	36,2	cyclictest	3747913	-21	kworker/u16:3+events_unbound	12:33:01	4
3042066	99	38	36,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	10:03:41	4
3042066	99	37	35,2	cyclictest	3372747	-21	kworker/u16:5+events_unbound	10:07:08	4
3042066	99	37	34,2	cyclictest	2775326	-21	kworker/u16:3+events_unbound	07:54:01	4
3042066	99	36	34,2	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	10:57:12	4
3042066	99	36	34,2	cyclictest	3064997	-21	kworker/u16:2+flush-8:0	07:28:46	4
3042066	99	36	34,2	cyclictest	3064997	-21	kworker/u16:2+flush-8:0	07:28:46	4
3042066	99	36	33,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	12:38:08	4
3042079	99	34	29,4	cyclictest	3602634	-21	latency_hist	11:23:46	7
3042074	99	34	32,2	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	11:33:45	6
3042066	99	34	33,1	cyclictest	3493917	-21	kworker/u16:3+events_unbound	11:21:45	4
3042066	99	34	32,2	cyclictest	3372747	-21	kworker/u16:5+flush-8:0	09:56:37	4
3042066	99	34	32,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	11:40:21	4
3042074	99	33	30,2	cyclictest	3312079	-21	kworker/u16:1+events_unbound	10:24:00	6
3042069	99	33	31,2	cyclictest	3122573	-21	kworker/u16:2+flush-8:0	08:07:33	5
3042066	99	33	31,2	cyclictest	3312079	-21	kworker/u16:1+events_unbound	09:51:01	4
3042066	99	33	31,2	cyclictest	3170796	-21	kworker/u16:3+events_unbound	08:23:41	4
3042066	99	32	30,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	11:29:56	4
3042069	99	31	29,2	cyclictest	3312079	-21	kworker/u16:1+events_unbound	10:34:16	5
3042066	99	31	29,2	cyclictest	3638878	-21	kworker/u16:5+events_unbound	12:18:28	4
3042066	99	31	29,2	cyclictest	3638878	-21	kworker/u16:5+events_unbound	12:18:28	4
3042066	99	31	29,2	cyclictest	3150837	-21	kworker/u16:0+flush-8:0	08:03:45	4
3042066	99	31	29,2	cyclictest	3122573	-21	kworker/u16:2+flush-8:0	09:32:33	4
3042074	99	30	27,2	cyclictest	3150837	-21	kworker/u16:0+events_unbound	08:49:04	6
3042066	99	30	29,1	cyclictest	3493917	-21	kworker/u16:3+events_unbound	11:27:29	4
3042066	99	30	28,2	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	12:11:16	4
3042066	99	30	28,2	cyclictest	3122573	-21	kworker/u16:2+flush-8:0	09:10:53	4
3042079	99	29	28,0	cyclictest	0	-21	swapper/7	11:09:12	7
3042066	99	29	27,2	cyclictest	3638878	-21	kworker/u16:5+flush-8:0	12:22:52	4
3042066	99	29	27,2	cyclictest	3494213	-21	kworker/u16:4+flush-8:0	10:59:20	4
3042066	99	29	27,2	cyclictest	3494213	-21	kworker/u16:4+events_unbound	11:08:32	4
3042066	99	29	27,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	10:35:28	4
3042066	99	29	27,2	cyclictest	3122573	-21	kworker/u16:2+events_unbound	09:35:01	4
3042066	99	29	27,2	cyclictest	3122573	-21	kworker/u16:2+events_unbound	09:35:01	4
3042074	99	28	25,3	cyclictest	3150837	-21	kworker/u16:0+flush-8:0	08:28:41	6
3042074	99	28	25,3	cyclictest	3122573	-21	kworker/u16:2+flush-8:0	08:18:41	6
3042074	99	28	25,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	11:48:59	6
3042069	99	28	25,2	cyclictest	3170796	-21	kworker/u16:3+events_unbound	09:18:58	5
3042066	99	28	26,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	10:31:40	4
3042066	99	28	26,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	10:25:05	4
3042066	99	28	26,2	cyclictest	3170796	-21	kworker/u16:3+events_unbound	09:40:57	4
3042079	99	27	26,0	cyclictest	0	-21	swapper/7	09:19:12	7
3042079	99	27	0,25	cyclictest	3275856	-21	latency_hist	09:08:46	7
3042066	99	27	25,2	cyclictest	3638878	-21	kworker/u16:5+events_unbound	11:45:52	4
3042066	99	27	25,2	cyclictest	3626738	-21	kworker/u16:1+events_unbound	12:03:52	4
3042066	99	27	25,2	cyclictest	3372747	-21	kworker/u16:5+flush-8:0	10:09:17	4
3042066	99	27	25,2	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	11:51:28	4
3042066	99	27	25,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	12:00:04	4
3042066	99	27	25,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	11:09:27	4
3042066	99	27	25,2	cyclictest	3170796	-21	kworker/u16:3+events_unbound	09:17:36	4
3042066	99	27	25,2	cyclictest	3122573	-21	kworker/u16:2+events_unbound	09:22:56	4
3042074	99	26	24,2	cyclictest	3626738	-21	kworker/u16:1+flush-8:0	12:09:08	6
3042074	99	26	23,2	cyclictest	3122573	-21	kworker/u16:2+flush-8:0	08:39:01	6
3042069	99	26	24,2	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	11:17:00	5
3042066	99	26	24,2	cyclictest	3312079	-21	kworker/u16:1+events_unbound	09:46:41	4
3042066	99	26	24,2	cyclictest	3122573	-21	kworker/u16:2+events_unbound	08:29:17	4
3042079	99	25	23,1	cyclictest	3757135	-21	ssh	12:24:14	7
3042074	99	25	23,2	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	12:14:14	6
3042074	99	25	23,2	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	12:14:14	6
3042074	99	25	22,2	cyclictest	3638878	-21	kworker/u16:5+events_unbound	11:44:04	6
3042069	99	25	23,2	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	10:21:01	5
3042069	99	25	22,2	cyclictest	3122573	-21	kworker/u16:2+events_unbound	09:39:04	5
3042066	99	25	23,2	cyclictest	3445485	-21	kworker/u16:2+events_unbound	10:22:01	4
3042066	99	25	23,2	cyclictest	3372747	-21	kworker/u16:5+events_unbound	10:15:26	4
3042066	99	25	23,2	cyclictest	3093601	-21	kworker/u16:0+flush-8:0	07:44:01	4
3041772	2	25	15,7	sleep6	0	-21	swapper/6	07:08:36	6
3042074	99	24	22,2	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	12:34:08	6
3042074	99	24	22,2	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	09:53:46	6
3042074	99	24	22,2	cyclictest	3312079	-21	kworker/u16:1+flush-8:0	09:24:11	6
3042069	99	24	22,2	cyclictest	3747913	-21	kworker/u16:3+events_unbound	12:34:14	5
3042069	99	24	22,2	cyclictest	3150837	-21	kworker/u16:0+events_unbound	08:49:08	5
3042066	99	24	22,2	cyclictest	3312079	-21	kworker/u16:1+events_unbound	09:24:28	4
3042069	99	23	21,2	cyclictest	3041819	-21	kworker/u16:1+flush-8:0	07:24:03	5
3042069	99	23	21,2	cyclictest	3041819	-21	kworker/u16:1+flush-8:0	07:24:03	5
3042066	99	23	21,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	10:44:57	4
3042079	99	22	21,0	cyclictest	0	-21	swapper/7	07:19:14	7
3042079	99	22	19,2	cyclictest	3616857	-21	ssh	11:29:03	7
3042079	99	22	19,2	cyclictest	3256849	-21	latency_hist	08:58:46	7
3042079	99	22	17,4	cyclictest	3287839	-21	latency_hist	09:13:46	7
3042074	99	22	20,2	cyclictest	3122573	-21	kworker/u16:2+flush-8:0	08:59:10	6
3042074	99	22	20,2	cyclictest	3122573	-21	kworker/u16:2+flush-8:0	08:59:10	6
3042069	99	22	20,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	10:43:58	5
3042066	99	22	20,2	cyclictest	3360587	-21	kworker/u16:0+events_unbound	12:24:37	4
3042066	99	22	19,2	cyclictest	2994505	-21	kworker/u16:0+events_unbound	07:08:50	4
3042074	99	21	19,2	cyclictest	3747913	-21	kworker/u16:3+events_unbound	12:28:59	6
3042074	99	21	18,2	cyclictest	3360587	-21	kworker/u16:0+flush-8:0	10:43:46	6
3042069	99	21	19,2	cyclictest	3638878	-21	kworker/u16:5+flush-8:0	12:03:04	5
3042069	99	21	19,2	cyclictest	3150837	-21	kworker/u16:0+flush-8:0	08:34:01	5
3042069	99	21	19,2	cyclictest	3122573	-21	kworker/u16:2+flush-8:0	09:34:10	5
3042069	99	21	19,2	cyclictest	3122573	-21	kworker/u16:2+flush-8:0	09:34:10	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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