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 Sat Sep 05, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2523173	2	58	48,7	sleep5	0	-21	swapper/5	19:06:01	5
2523325	2	56	22,29	sleep7	0	-21	swapper/7	19:08:11	7
2523694	99	49	41,7	cyclictest	2894899	-21	kworker/u16:5+flush-8:0	22:39:22	6
2523694	99	48	45,2	cyclictest	2566775	-21	kworker/u16:1+flush-8:0	20:19:22	6
3138276	2	47	0,0	chrt	3138274	-21	ssh	23:43:44	7
2523692	99	43	41,2	cyclictest	2894899	-21	kworker/u16:5+events_unbound	22:29:41	5
2523692	99	43	41,2	cyclictest	2882788	-21	kworker/u16:4+flush-8:0	22:14:22	5
2523697	99	42	39,2	cyclictest	3078963	-21	hddtemp_smartct	23:19:37	7
2523692	99	42	40,2	cyclictest	2882788	-21	kworker/u16:4+flush-8:0	22:19:38	5
2523688	99	42	40,2	cyclictest	2484632	-21	kworker/u16:5+flush-8:0	19:14:23	4
2523694	99	41	38,2	cyclictest	3175696	-21	kworker/u16:1+flush-8:0	00:19:22	6
2523140	2	41	30,7	sleep4	0	-21	swapper/4	19:05:35	4
2523697	99	40	0,38	cyclictest	3102168	-21	date	23:29:22	7
2523692	99	40	37,2	cyclictest	3102169	-21	kworker/u16:2+events_unbound	23:34:52	5
2523688	99	40	37,2	cyclictest	2547329	-21	kworker/u16:0+flush-8:0	19:34:22	4
2523692	99	39	37,2	cyclictest	2808554	-21	kworker/u16:2+events_unbound	21:30:34	5
2523103	2	39	29,7	sleep6	0	-21	swapper/6	19:05:05	6
2523697	99	38	0,36	cyclictest	2614987	-21	sleep	19:54:22	7
2523694	99	38	36,2	cyclictest	2882788	-21	kworker/u16:4+flush-8:0	23:04:17	6
2523692	99	38	36,2	cyclictest	2821653	-21	kworker/u16:3+events_unbound	21:36:14	5
2523692	99	38	35,2	cyclictest	3175696	-21	kworker/u16:1+events_unbound	00:19:45	5
2523692	99	38	35,2	cyclictest	2894899	-21	kworker/u16:5+events_unbound	22:39:24	5
2523688	99	38	36,2	cyclictest	3029063	-21	kworker/u16:5+flush-8:0	00:24:22	4
2523697	99	37	31,5	cyclictest	2870371	-21	latency_hist	21:54:22	7
2523697	99	37	31,5	cyclictest	2870371	-21	latency_hist	21:54:22	7
2523694	99	37	35,2	cyclictest	2566775	-21	kworker/u16:1+flush-8:0	21:49:22	6
2523692	99	37	35,2	cyclictest	2566775	-21	kworker/u16:1+events_unbound	21:25:14	5
2523697	99	36	0,34	cyclictest	2576228	-21	sed	19:34:22	7
2523694	99	36	33,2	cyclictest	2449629	-21	kworker/u16:3+flush-8:0	19:19:23	6
2523692	99	36	34,2	cyclictest	3152141	-21	kworker/u16:3+events_unbound	23:57:10	5
2523692	99	36	34,2	cyclictest	2882788	-21	kworker/u16:4+events_unbound	23:05:58	5
2523692	99	36	34,2	cyclictest	2821653	-21	kworker/u16:3+events_unbound	21:57:05	5
2523692	99	36	34,2	cyclictest	2808554	-21	kworker/u16:2+flush-8:0	22:01:53	5
2523692	99	36	34,2	cyclictest	2751424	-21	kworker/u16:3+flush-8:0	21:14:57	5
2523692	99	36	33,2	cyclictest	3211867	-21	kworker/u16:2+events_unbound	00:29:29	5
2523694	99	35	33,2	cyclictest	3211867	-21	kworker/u16:2+flush-8:0	00:29:37	6
2523692	99	35	33,2	cyclictest	3016668	-21	kworker/u16:0+events_unbound	23:49:53	5
2523692	99	35	33,2	cyclictest	3016668	-21	kworker/u16:0+events_unbound	23:49:53	5
2523692	99	35	33,2	cyclictest	2821653	-21	kworker/u16:3+flush-8:0	21:40:33	5
2523692	99	35	33,2	cyclictest	2566775	-21	kworker/u16:1+events_unbound	21:48:02	5
2523697	99	34	28,5	cyclictest	2566397	-21	latency_hist	19:29:22	7
2523694	99	34	31,2	cyclictest	2692916	-21	kworker/u16:4+flush-8:0	21:09:42	6
2523694	99	34	31,2	cyclictest	2547329	-21	kworker/u16:0+flush-8:0	19:39:46	6
2523694	99	34	31,2	cyclictest	2547329	-21	kworker/u16:0+flush-8:0	19:39:46	6
2523692	99	34	32,2	cyclictest	3102169	-21	kworker/u16:2+events_unbound	23:43:41	5
2523692	99	34	32,2	cyclictest	3029063	-21	kworker/u16:5+events_unbound	23:47:10	5
2523692	99	34	32,2	cyclictest	3029063	-21	kworker/u16:5+events_unbound	00:03:06	5
2523692	99	34	32,2	cyclictest	3017099	-21	kworker/u16:1+events_unbound	23:04:09	5
2523692	99	34	32,2	cyclictest	2894899	-21	kworker/u16:5+events_unbound	22:27:38	5
2523692	99	34	32,2	cyclictest	2882788	-21	kworker/u16:4+flush-8:0	23:14:50	5
2523692	99	34	32,2	cyclictest	2882788	-21	kworker/u16:4+events_unbound	23:32:02	5
2523692	99	34	32,2	cyclictest	2821653	-21	kworker/u16:3+flush-8:0	21:52:10	5
2523692	99	34	32,2	cyclictest	2821653	-21	kworker/u16:3+flush-8:0	21:52:10	5
2523692	99	34	32,2	cyclictest	2808554	-21	kworker/u16:2+events_unbound	22:34:42	5
2523692	99	33	31,2	cyclictest	3029063	-21	kworker/u16:5+flush-8:0	23:25:25	5
2523692	99	33	31,2	cyclictest	3017099	-21	kworker/u16:1+flush-8:0	23:12:02	5
2523692	99	33	31,2	cyclictest	3017099	-21	kworker/u16:1+flush-8:0	23:12:02	5
2523692	99	33	31,2	cyclictest	2808554	-21	kworker/u16:2+flush-8:0	22:51:53	5
2523692	99	33	31,2	cyclictest	2808554	-21	kworker/u16:2+events_unbound	22:15:49	5
2523692	99	33	31,2	cyclictest	2566775	-21	kworker/u16:1+events_unbound	20:47:34	5
2523692	99	33	30,2	cyclictest	3029063	-21	kworker/u16:5+flush-8:0	00:04:25	5
2523694	99	32	30,2	cyclictest	2547329	-21	kworker/u16:0+flush-8:0	19:34:37	6
2523692	99	32	30,2	cyclictest	3211867	-21	kworker/u16:2+events_unbound	00:18:38	5
2523692	99	32	30,2	cyclictest	3175696	-21	kworker/u16:1+events_unbound	00:27:02	5
2523692	99	32	30,2	cyclictest	3017099	-21	kworker/u16:1+flush-8:0	23:23:17	5
2523692	99	32	29,2	cyclictest	2882788	-21	kworker/u16:4+events_unbound	22:04:25	5
2523688	99	32	29,2	cyclictest	2614988	-21	kworker/u16:0+flush-8:0	20:09:23	4
2523697	99	31	26,4	cyclictest	648	-21	systemd-journal	22:24:21	7
2523694	99	31	29,2	cyclictest	3016668	-21	kworker/u16:0+flush-8:0	00:05:13	6
2523694	99	31	28,2	cyclictest	3029063	-21	kworker/u16:5+events_unbound	23:24:38	6
2523692	99	31	29,2	cyclictest	3260355	-21	kworker/u16:4+events_unbound	00:37:40	5
2523692	99	31	29,2	cyclictest	3016668	-21	kworker/u16:0+events_unbound	00:11:09	5
2523692	99	31	29,2	cyclictest	2955882	-21	kworker/u16:3+events_unbound	22:58:46	5
2523692	99	31	29,2	cyclictest	2882788	-21	kworker/u16:4+events_unbound	22:48:17	5
2523692	99	30	28,2	cyclictest	2751424	-21	kworker/u16:3+events_unbound	21:10:17	5
2523692	99	30	28,2	cyclictest	2566775	-21	kworker/u16:1+events_unbound	21:21:11	5
2523694	99	29	27,2	cyclictest	2882788	-21	kworker/u16:4+events_unbound	23:15:05	6
2523694	99	29	27,2	cyclictest	2566775	-21	kworker/u16:1+events_unbound	21:04:37	6
2523694	99	29	27,2	cyclictest	2566775	-21	kworker/u16:1+events_unbound	20:04:37	6
2523694	99	29	26,2	cyclictest	2566775	-21	kworker/u16:1+flush-8:0	20:49:22	6
2523692	99	29	27,2	cyclictest	2547329	-21	kworker/u16:0+events_unbound	19:36:34	5
2523688	99	29	26,2	cyclictest	2894899	-21	kworker/u16:5+flush-8:0	22:24:34	4
2523697	99	28	22,5	cyclictest	2546942	-21	latency_hist	19:19:23	7
2523694	99	28	22,6	cyclictest	2894899	-21	kworker/u16:5+events_unbound	22:29:57	6
2523692	99	28	25,2	cyclictest	2614988	-21	kworker/u16:0+events_unbound	20:49:30	5
2523688	99	28	26,2	cyclictest	3248911	-21	kworker/u16:6+events_unbound	00:33:35	4
2523697	99	26	25,0	cyclictest	0	-21	swapper/7	21:14:35	7
2523697	99	26	0,24	cyclictest	3026184	-21	xargs	22:54:53	7
2523692	99	26	24,2	cyclictest	2614988	-21	kworker/u16:0+flush-8:0	20:29:23	5
2523688	99	26	24,2	cyclictest	2751424	-21	kworker/u16:3+flush-8:0	21:14:53	4
2523688	99	26	23,2	cyclictest	2449629	-21	kworker/u16:3+events_unbound	19:14:25	4
2523697	99	25	20,4	cyclictest	2931378	-21	latency_hist	22:19:23	7
2523694	99	25	23,2	cyclictest	3029063	-21	kworker/u16:5+flush-8:0	23:44:37	6
2523692	99	25	23,2	cyclictest	2566775	-21	kworker/u16:1+events_unbound	20:58:33	5
2523692	99	25	23,2	cyclictest	2449629	-21	kworker/u16:3+events_unbound	19:10:58	5
2523688	99	25	21,3	cyclictest	2955882	-21	kworker/u16:3+flush-8:0	22:49:37	4
2840575	2	24	0,1	chrt	0	-21	swapper/4	21:39:43	4
2523697	99	24	22,1	cyclictest	2809488	-21	munin-plugin-st	21:29:22	7
2523697	99	24	22,1	cyclictest	0	-21	swapper/7	20:24:37	7
2523694	99	24	22,2	cyclictest	2955882	-21	kworker/u16:3+events_unbound	22:45:33	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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