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 Wed Jan 14, 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
2499675	2	53	19,30	sleep7	0	-21	swapper/7	07:06:20	7
2499503	2	52	41,8	sleep4	0	-21	swapper/4	07:03:52	4
2499579	2	49	39,7	sleep6	0	-21	swapper/6	07:04:59	6
2500087	99	48	46,2	cyclictest	2771108	-21	kworker/u16:0+events_unbound	09:37:58	5
2500096	99	46	0,44	cyclictest	2925707	-21	latency_hist	10:27:45	7
2499569	2	44	34,7	sleep5	0	-21	swapper/5	07:04:50	5
2500087	99	43	41,2	cyclictest	3173206	-21	kworker/u16:2+flush-8:0	12:25:07	5
2500087	99	43	41,2	cyclictest	2938149	-21	kworker/u16:4+events_unbound	10:37:58	5
2500087	99	43	41,2	cyclictest	2938149	-21	kworker/u16:4+events_unbound	10:36:59	5
2500087	99	43	41,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	09:52:29	5
2500087	99	43	41,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	09:52:29	5
2500092	99	42	40,2	cyclictest	3160473	-21	kworker/u16:4+events_unbound	12:36:51	6
2500092	99	42	40,2	cyclictest	3160473	-21	kworker/u16:4+events_unbound	12:36:51	6
2500092	99	42	40,2	cyclictest	3158014	-21	kworker/u16:2+events_unbound	12:00:24	6
2500092	99	42	40,2	cyclictest	2737235	-21	kworker/u16:4+events_unbound	09:16:08	6
2500092	99	42	40,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	09:52:47	6
2500087	99	42	40,2	cyclictest	3010270	-21	kworker/u16:1+events_unbound	11:10:24	5
2597927	2	41	0,1	sleep5	0	-21	swapper/5	07:53:05	5
2500092	99	41	39,2	cyclictest	3173206	-21	kworker/u16:2+flush-8:0	12:12:19	6
2500092	99	41	39,2	cyclictest	3160473	-21	kworker/u16:4+flush-8:0	12:28:36	6
2500092	99	41	39,2	cyclictest	2789808	-21	kworker/u16:4+events_unbound	09:36:28	6
2500092	99	41	39,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	11:48:27	6
2500092	99	41	39,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	09:47:28	6
2500092	99	41	39,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	09:38:51	6
2500092	99	41	38,2	cyclictest	3160473	-21	kworker/u16:4+events_unbound	12:05:15	6
2500087	99	41	39,2	cyclictest	3061921	-21	kworker/u16:2+events_unbound	11:30:59	5
2500087	99	41	38,2	cyclictest	3160473	-21	kworker/u16:4+flush-8:0	12:07:45	5
2500096	99	40	33,6	cyclictest	3024515	-21	latency_hist	11:07:45	7
2500087	99	40	38,2	cyclictest	3010270	-21	kworker/u16:1+events_unbound	11:04:19	5
2500087	99	40	38,2	cyclictest	2850534	-21	kworker/u16:2+events_unbound	10:15:47	5
2500087	99	40	38,2	cyclictest	2827216	-21	kworker/u16:1+events_unbound	10:07:07	5
2500087	99	40	38,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	11:02:43	5
2500092	99	39	37,2	cyclictest	3160473	-21	kworker/u16:4+events_unbound	12:22:27	6
2500092	99	39	37,2	cyclictest	3010270	-21	kworker/u16:1+events_unbound	11:30:08	6
2500092	99	39	37,2	cyclictest	3010270	-21	kworker/u16:1+events_unbound	11:23:59	6
2500092	99	39	37,2	cyclictest	3010270	-21	kworker/u16:1+events_unbound	11:18:48	6
2500092	99	39	37,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	11:55:19	6
2500092	99	39	37,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	11:40:59	6
2500092	99	39	37,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	09:09:08	6
2500087	99	39	37,2	cyclictest	3010270	-21	kworker/u16:1+flush-8:0	11:48:11	5
2500087	99	39	37,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	09:59:12	5
2500092	99	38	36,2	cyclictest	3197949	-21	kworker/u16:1+events_unbound	12:22:58	6
2500092	99	38	36,2	cyclictest	3010270	-21	kworker/u16:1+events_unbound	11:10:16	6
2500092	99	38	36,2	cyclictest	2962777	-21	kworker/u16:2+events_unbound	10:54:03	6
2500092	99	38	36,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	11:01:31	6
2500092	99	38	36,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	10:09:28	6
2500092	99	38	36,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	10:07:42	6
2500087	99	38	36,2	cyclictest	3197949	-21	kworker/u16:1+events_unbound	12:33:55	5
2500087	99	38	36,2	cyclictest	3197949	-21	kworker/u16:1+events_unbound	12:33:55	5
2500087	99	38	36,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	10:50:38	5
2500092	99	37	35,2	cyclictest	3086280	-21	kworker/u16:4+events_unbound	11:36:08	6
2500092	99	37	35,2	cyclictest	2938149	-21	kworker/u16:4+events_unbound	10:45:23	6
2500092	99	37	35,2	cyclictest	2933317	-21	kworker/u16:0+events_unbound	10:42:23	6
2500092	99	37	35,2	cyclictest	2827216	-21	kworker/u16:1+events_unbound	10:14:11	6
2500092	99	37	34,2	cyclictest	2678997	-21	kworker/u16:3+flush-8:0	09:22:45	6
2500087	99	37	35,2	cyclictest	2985016	-21	kworker/u16:0+events_unbound	10:56:04	5
2500087	99	37	35,2	cyclictest	2737235	-21	kworker/u16:4+events_unbound	09:10:40	5
2500092	99	36	34,2	cyclictest	3010270	-21	kworker/u16:1+events_unbound	11:46:51	6
2500092	99	36	34,2	cyclictest	2850534	-21	kworker/u16:2+events_unbound	10:29:22	6
2500087	99	36	34,2	cyclictest	3216534	-21	kworker/u16:3+events_unbound	12:29:31	5
2500087	99	36	34,2	cyclictest	3173206	-21	kworker/u16:2+flush-8:0	12:10:11	5
2500087	99	36	34,2	cyclictest	3111013	-21	kworker/u16:0+events_unbound	12:20:22	5
2500087	99	36	34,2	cyclictest	2737235	-21	kworker/u16:4+events_unbound	09:13:24	5
2500092	99	35	33,2	cyclictest	3111013	-21	kworker/u16:0+events_unbound	12:14:24	6
2500092	99	35	33,2	cyclictest	2737127	-21	kworker/u16:1+events_unbound	09:30:28	6
2500092	99	35	33,2	cyclictest	2678997	-21	kworker/u16:3+flush-8:0	09:48:01	6
2500092	99	35	33,2	cyclictest	2678997	-21	kworker/u16:3+flush-8:0	09:48:01	6
2500092	99	35	33,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	10:33:10	6
2500087	99	35	33,2	cyclictest	3010270	-21	kworker/u16:1+flush-8:0	11:33:31	5
2500087	99	35	33,2	cyclictest	2827216	-21	kworker/u16:1+events_unbound	09:57:19	5
2500087	99	35	33,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	10:22:23	5
2500087	99	35	33,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	09:28:27	5
2500087	99	35	32,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	11:57:46	5
2500092	99	34	32,2	cyclictest	3012225	-21	kworker/u16:4+events_unbound	11:16:47	6
2500092	99	34	32,2	cyclictest	2850534	-21	kworker/u16:2+events_unbound	10:25:25	6
2500092	99	34	31,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	09:57:52	6
2500087	99	34	32,2	cyclictest	3160473	-21	kworker/u16:4+flush-8:0	12:13:36	5
2500087	99	34	32,2	cyclictest	2938149	-21	kworker/u16:4+events_unbound	10:43:55	5
2500087	99	34	32,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	10:12:23	5
2500087	99	33	31,2	cyclictest	3012225	-21	kworker/u16:4+events_unbound	11:19:18	5
2500087	99	33	31,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	11:41:32	5
2500087	99	33	31,2	cyclictest	2498559	-21	kworker/u16:1+events_unbound	07:25:36	5
2500092	99	32	30,2	cyclictest	2850534	-21	kworker/u16:2+events_unbound	10:21:33	6
2500087	99	32	30,2	cyclictest	2850534	-21	kworker/u16:2+events_unbound	10:23:42	5
2500087	99	32	30,2	cyclictest	2678997	-21	kworker/u16:3+events_unbound	11:23:34	5
2500087	99	32	30,2	cyclictest	2601377	-21	kworker/u16:2+events_unbound	08:10:56	5
2500096	99	31	0,29	cyclictest	2571969	-21	latency_hist	07:42:46	7
2500092	99	31	29,2	cyclictest	2586269	-21	kworker/u16:1+events_unbound	08:33:56	6
2500092	99	31	29,2	cyclictest	2552187	-21	kworker/u16:0+events_unbound	07:50:56	6
2500092	99	31	29,2	cyclictest	2439419	-21	kworker/u16:4+events_unbound	07:39:52	6
2500092	99	31	28,2	cyclictest	3010270	-21	kworker/u16:1+events_unbound	11:02:53	6
2500087	99	31	29,2	cyclictest	3010270	-21	kworker/u16:1+events_unbound	11:16:43	5
2500087	99	31	29,2	cyclictest	2789808	-21	kworker/u16:4+events_unbound	09:35:10	5
2500087	99	31	29,2	cyclictest	2678997	-21	kworker/u16:3+flush-8:0	11:53:26	5
2500092	99	30	28,2	cyclictest	2938149	-21	kworker/u16:4+flush-8:0	10:48:06	6
2500092	99	30	28,2	cyclictest	2601377	-21	kworker/u16:2+events_unbound	08:13:56	6
2500092	99	30	28,2	cyclictest	2552187	-21	kworker/u16:0+events_unbound	07:59:57	6
2500087	99	30	28,2	cyclictest	2771108	-21	kworker/u16:0+events_unbound	09:45:10	5
2500087	99	30	28,2	cyclictest	2771108	-21	kworker/u16:0+events_unbound	09:21:07	5
2500087	99	30	28,2	cyclictest	2737127	-21	kworker/u16:1+events_unbound	09:24:03	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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