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 Mon Nov 24, 2025 00:43:32)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
294440	99	62	0,60	cyclictest	864380	-21	latency_hist	08:03:24	7
293892	2	59	49,7	sleep5	0	-21	swapper/5	03:20:44	5
293912	2	58	48,7	sleep6	0	-21	swapper/6	03:21:01	6
294440	99	57	51,5	cyclictest	304361	-21	latency_hist	03:28:25	7
293880	2	57	46,7	sleep4	0	-21	swapper/4	03:20:35	4
294440	99	48	43,4	cyclictest	571162	-21	latency_hist	05:38:25	7
294440	99	47	46,0	cyclictest	0	-21	swapper/7	06:26:47	7
294427	99	47	44,3	cyclictest	318182	-21	kworker/u16:0+flush-8:0	03:33:25	4
294427	99	45	43,2	cyclictest	318182	-21	kworker/u16:0+flush-8:0	04:03:26	4
285658	2	43	6,31	sleep7	0	-21	swapper/7	03:18:45	7
294427	99	41	39,2	cyclictest	449719	-21	kworker/u16:0+flush-8:0	06:08:25	4
294440	99	40	0,38	cyclictest	480116	-21	latency_hist	04:53:25	7
294440	99	38	35,2	cyclictest	677121	-21	kthreadcore	06:28:46	7
294436	99	38	36,2	cyclictest	284383	-21	kworker/u16:3+events_unbound	03:52:35	6
294436	99	38	35,2	cyclictest	500396	-21	kworker/u16:4+events_unbound	05:23:34	6
294427	99	38	35,2	cyclictest	894631	-21	kworker/u16:6+flush-8:0	08:28:25	4
294436	99	37	35,2	cyclictest	712601	-21	kworker/u16:0+flush-8:0	07:28:51	6
294431	99	37	35,2	cyclictest	284383	-21	kworker/u16:3+events_unbound	03:42:35	5
294436	99	36	34,2	cyclictest	303975	-21	kworker/u16:2+flush-8:0	03:43:51	6
294427	99	36	32,3	cyclictest	471109	-21	kworker/u16:2+events_unbound	04:53:40	4
294436	99	35	33,2	cyclictest	651123	-21	kworker/u16:3+events_unbound	06:38:58	6
294436	99	35	33,2	cyclictest	642908	-21	kworker/u16:1+flush-8:0	06:14:34	6
294436	99	35	33,2	cyclictest	500396	-21	kworker/u16:4+flush-8:0	06:36:34	6
294436	99	34	32,2	cyclictest	701717	-21	kworker/u16:2+flush-8:0	07:10:50	6
294436	99	34	32,2	cyclictest	284383	-21	kworker/u16:3+flush-8:0	03:38:54	6
294436	99	34	31,2	cyclictest	284383	-21	kworker/u16:3+flush-8:0	03:23:28	6
294431	99	34	32,2	cyclictest	687018	-21	kworker/u16:1+flush-8:0	06:46:46	5
294427	99	34	31,3	cyclictest	449719	-21	kworker/u16:0+flush-8:0	05:13:50	4
294440	99	33	32,0	cyclictest	0	-21	swapper/7	04:30:28	7
294436	99	33	31,2	cyclictest	914904	-21	kworker/u16:3+flush-8:0	08:27:10	6
294436	99	33	31,2	cyclictest	914904	-21	kworker/u16:3+events_unbound	08:30:35	6
294436	99	33	31,2	cyclictest	687018	-21	kworker/u16:1+events_unbound	06:50:49	6
294436	99	33	31,2	cyclictest	500396	-21	kworker/u16:4+events_unbound	05:43:34	6
294436	99	33	31,2	cyclictest	449719	-21	kworker/u16:0+events_unbound	06:12:56	6
294436	99	33	30,2	cyclictest	416272	-21	kworker/u16:3+flush-8:0	04:23:35	6
294436	99	32	30,2	cyclictest	712601	-21	kworker/u16:0+events_unbound	07:06:23	6
294436	99	32	30,2	cyclictest	575866	-21	kworker/u16:3+flush-8:0	05:49:39	6
294436	99	32	30,2	cyclictest	489950	-21	kworker/u16:3+events_unbound	04:57:07	6
294436	99	32	30,2	cyclictest	449719	-21	kworker/u16:0+flush-8:0	05:14:35	6
294436	99	32	29,2	cyclictest	687018	-21	kworker/u16:1+flush-8:0	06:53:26	6
294431	99	32	30,2	cyclictest	860151	-21	kworker/u16:2+flush-8:0	08:22:10	5
294431	99	32	30,2	cyclictest	687018	-21	kworker/u16:1+events_unbound	07:09:39	5
294431	99	32	30,2	cyclictest	550569	-21	kworker/u16:2+flush-8:0	05:38:18	5
294431	99	32	30,2	cyclictest	550569	-21	kworker/u16:2+events_unbound	05:40:38	5
294431	99	32	30,2	cyclictest	339042	-21	kworker/u16:1+flush-8:0	04:52:46	5
294427	99	32	30,2	cyclictest	773419	-21	kworker/u16:3+flush-8:0	08:08:24	4
294440	99	31	30,0	cyclictest	0	-21	swapper/7	08:12:50	7
294440	99	31	0,29	cyclictest	896908	-21	cut	08:18:46	7
294436	99	31	29,2	cyclictest	873492	-21	kworker/u16:0+events_unbound	08:14:55	6
294436	99	31	29,2	cyclictest	823852	-21	kworker/u16:1+flush-8:0	08:00:54	6
294436	99	31	29,2	cyclictest	701717	-21	kworker/u16:2+events_unbound	07:26:47	6
294436	99	31	29,2	cyclictest	701717	-21	kworker/u16:2+events_unbound	07:14:34	6
294431	99	31	29,2	cyclictest	823852	-21	kworker/u16:1+events_unbound	07:56:49	5
294431	99	31	29,2	cyclictest	773419	-21	kworker/u16:3+events_unbound	07:52:50	5
294431	99	31	29,2	cyclictest	550569	-21	kworker/u16:2+flush-8:0	05:44:19	5
294431	99	31	29,2	cyclictest	449719	-21	kworker/u16:0+events_unbound	05:05:06	5
294431	99	31	29,2	cyclictest	339042	-21	kworker/u16:1+events_unbound	04:34:19	5
294431	99	31	28,2	cyclictest	489950	-21	kworker/u16:3+events_unbound	05:13:28	5
294440	99	30	27,2	cyclictest	722918	-21	perf	06:53:25	7
294436	99	30	28,2	cyclictest	823852	-21	kworker/u16:1+events_unbound	08:35:11	6
294436	99	30	28,2	cyclictest	632274	-21	kworker/u16:2+events_unbound	06:21:50	6
294436	99	30	28,2	cyclictest	349152	-21	kworker/u16:4+events_unbound	04:17:15	6
294436	99	30	28,2	cyclictest	284383	-21	kworker/u16:3+flush-8:0	03:58:59	6
294431	99	30	28,2	cyclictest	687018	-21	kworker/u16:1+events_unbound	06:56:18	5
294431	99	30	28,2	cyclictest	500396	-21	kworker/u16:4+flush-8:0	06:31:15	5
294431	99	30	28,2	cyclictest	449719	-21	kworker/u16:0+events_unbound	05:59:10	5
294431	99	30	28,2	cyclictest	318182	-21	kworker/u16:0+flush-8:0	03:51:40	5
294436	99	29	27,2	cyclictest	925152	-21	kworker/u16:2+flush-8:0	08:38:46	6
294436	99	29	27,2	cyclictest	873492	-21	kworker/u16:0+events_unbound	08:22:46	6
294436	99	29	27,2	cyclictest	712601	-21	kworker/u16:0+events_unbound	07:39:23	6
294436	99	29	27,2	cyclictest	701717	-21	kworker/u16:2+events_unbound	06:59:31	6
294436	99	29	27,2	cyclictest	687018	-21	kworker/u16:1+events_unbound	06:47:34	6
294436	99	29	27,2	cyclictest	500396	-21	kworker/u16:4+events_unbound	05:34:48	6
294436	99	29	27,2	cyclictest	416272	-21	kworker/u16:3+events_unbound	04:19:35	6
294436	99	29	27,2	cyclictest	339042	-21	kworker/u16:1+events_unbound	04:48:19	6
294436	99	29	27,2	cyclictest	339042	-21	kworker/u16:1+events_unbound	04:06:26	6
294431	99	29	27,2	cyclictest	925152	-21	kworker/u16:2+flush-8:0	08:48:55	5
294431	99	29	27,2	cyclictest	712601	-21	kworker/u16:0+events_unbound	07:47:14	5
294431	99	29	27,2	cyclictest	701717	-21	kworker/u16:2+flush-8:0	06:59:51	5
294431	99	29	27,2	cyclictest	701717	-21	kworker/u16:2+events_unbound	07:32:46	5
294431	99	29	27,2	cyclictest	651123	-21	kworker/u16:3+flush-8:0	06:26:38	5
294431	99	29	27,2	cyclictest	489950	-21	kworker/u16:3+flush-8:0	05:11:43	5
294431	99	29	26,2	cyclictest	339042	-21	kworker/u16:1+flush-8:0	04:17:46	5
294436	99	28	26,2	cyclictest	945024	-21	kworker/u16:0+events_unbound	08:50:47	6
294436	99	28	26,2	cyclictest	945024	-21	kworker/u16:0+events_unbound	08:46:48	6
294436	99	28	26,2	cyclictest	773419	-21	kworker/u16:3+flush-8:0	08:07:55	6
294436	99	28	26,2	cyclictest	449719	-21	kworker/u16:0+flush-8:0	04:38:51	6
294436	99	28	26,2	cyclictest	318182	-21	kworker/u16:0+events_unbound	03:57:27	6
294436	99	28	26,2	cyclictest	318182	-21	kworker/u16:0+events_unbound	03:37:27	6
294436	99	28	26,2	cyclictest	303975	-21	kworker/u16:2+events_unbound	03:33:03	6
294436	99	28	25,2	cyclictest	500396	-21	kworker/u16:4+events_unbound	06:03:26	6
294431	99	28	26,2	cyclictest	925152	-21	kworker/u16:2+flush-8:0	08:41:26	5
294431	99	28	26,2	cyclictest	914904	-21	kworker/u16:3+flush-8:0	08:33:30	5
294431	99	28	26,2	cyclictest	823852	-21	kworker/u16:1+flush-8:0	08:18:15	5
294431	99	28	26,2	cyclictest	823852	-21	kworker/u16:1+events_unbound	08:00:22	5
294431	99	28	26,2	cyclictest	773419	-21	kworker/u16:3+events_unbound	07:42:58	5
294431	99	28	26,2	cyclictest	712601	-21	kworker/u16:0+flush-8:0	07:36:26	5
294431	99	28	26,2	cyclictest	687018	-21	kworker/u16:1+events_unbound	06:51:42	5
294431	99	28	26,2	cyclictest	489950	-21	kworker/u16:3+flush-8:0	04:56:59	5
294431	99	28	26,2	cyclictest	409129	-21	kworker/u16:2+events_unbound	04:30:03	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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