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 Thu Jul 02, 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
2990193	2	96	0,0	sleep5	0	-21	swapper/5	12:10:21	5
2301483	2	54	20,29	sleep7	0	-21	swapper/7	07:05:32	7
2301483	2	54	20,29	sleep7	0	-21	swapper/7	07:05:32	7
2301729	2	51	41,7	sleep4	0	-21	swapper/4	07:08:58	4
2301729	2	51	41,7	sleep4	0	-21	swapper/4	07:08:58	4
2301454	2	47	37,7	sleep5	0	-21	swapper/5	07:05:06	5
2301454	2	47	37,7	sleep5	0	-21	swapper/5	07:05:06	5
2302037	99	42	36,5	cyclictest	2325186	-21	latency_hist	07:18:59	7
2302027	99	42	40,2	cyclictest	2971217	-21	kworker/u16:0+flush-8:0	12:28:58	4
2302027	99	41	39,2	cyclictest	2403538	-21	kworker/u16:1+events_unbound	09:11:55	4
2301587	2	40	30,7	sleep6	0	-21	swapper/6	07:06:59	6
2301587	2	40	30,7	sleep6	0	-21	swapper/6	07:06:59	6
2302027	99	38	36,2	cyclictest	2868731	-21	kworker/u16:2+flush-8:0	12:19:18	4
2302027	99	38	36,2	cyclictest	2573319	-21	kworker/u16:6+events_unbound	10:03:03	4
2302037	99	37	31,5	cyclictest	0	-21	swapper/7	07:59:01	7
2302032	99	37	35,2	cyclictest	2868731	-21	kworker/u16:2+events_unbound	11:49:20	6
2302027	99	36	34,2	cyclictest	2708617	-21	kworker/u16:1+events_unbound	10:32:14	4
2302027	99	36	33,2	cyclictest	2573319	-21	kworker/u16:6+flush-8:0	09:23:59	4
2302037	99	35	30,4	cyclictest	2723173	-21	cat	10:23:53	7
2302027	99	35	33,2	cyclictest	2601432	-21	kworker/u16:2+events_unbound	10:53:34	4
2302032	99	33	31,2	cyclictest	2830775	-21	kworker/u16:1+events_unbound	11:55:41	6
2302027	99	33	31,2	cyclictest	2971217	-21	kworker/u16:0+flush-8:0	12:08:59	4
2302027	99	33	31,2	cyclictest	2830775	-21	kworker/u16:1+events_unbound	11:32:55	4
2302027	99	33	31,2	cyclictest	2601389	-21	kworker/u16:1+events_unbound	09:52:58	4
2302032	99	32	30,2	cyclictest	2868731	-21	kworker/u16:2+events_unbound	12:25:24	6
2302027	99	32	30,2	cyclictest	2830775	-21	kworker/u16:1+events_unbound	11:52:10	4
2302027	99	32	30,2	cyclictest	2747699	-21	kworker/u16:4+events_unbound	10:42:59	4
2302027	99	32	30,2	cyclictest	2601389	-21	kworker/u16:1+events_unbound	09:46:58	4
2302027	99	32	30,2	cyclictest	2540122	-21	kworker/u16:4+flush-8:0	09:34:38	4
2302027	99	31	29,2	cyclictest	3017045	-21	kworker/u16:4+events_unbound	12:31:49	4
2302027	99	31	29,2	cyclictest	2830775	-21	kworker/u16:1+events_unbound	11:06:30	4
2302027	99	31	29,2	cyclictest	2520162	-21	kworker/u16:3+events_unbound	09:17:10	4
2302027	99	31	27,3	cyclictest	2722983	-21	kworker/u16:3+flush-8:0	11:54:04	4
2302037	99	30	24,5	cyclictest	2967720	-21	latency_hist	12:03:59	7
2302027	99	30	28,2	cyclictest	2868731	-21	kworker/u16:2+events_unbound	11:26:01	4
2302027	99	30	28,2	cyclictest	2708617	-21	kworker/u16:1+events_unbound	10:23:29	4
2302027	99	30	28,2	cyclictest	2573319	-21	kworker/u16:6+events_unbound	09:40:39	4
2302037	99	29	28,0	cyclictest	0	-21	swapper/7	12:26:57	7
2302032	99	29	27,2	cyclictest	2971217	-21	kworker/u16:0+events_unbound	12:37:01	6
2302027	99	29	27,2	cyclictest	2971217	-21	kworker/u16:0+events_unbound	12:12:02	4
2302027	99	29	27,2	cyclictest	2943311	-21	kworker/u16:4+events_unbound	11:59:59	4
2302027	99	29	27,2	cyclictest	2868731	-21	kworker/u16:2+events_unbound	11:22:34	4
2302027	99	29	27,2	cyclictest	2747699	-21	kworker/u16:4+events_unbound	10:36:46	4
2302027	99	29	27,2	cyclictest	2722983	-21	kworker/u16:3+events_unbound	11:09:54	4
2302027	99	29	26,3	cyclictest	2573319	-21	kworker/u16:6+events_unbound	09:57:23	4
2302027	99	28	26,2	cyclictest	2868731	-21	kworker/u16:2+events_unbound	11:36:38	4
2302027	99	28	26,2	cyclictest	2830775	-21	kworker/u16:1+events_unbound	11:47:03	4
2302027	99	28	26,2	cyclictest	2601432	-21	kworker/u16:2+events_unbound	10:58:10	4
2302027	99	28	26,2	cyclictest	2588015	-21	kworker/u16:0+events_unbound	09:32:34	4
2302037	99	27	26,0	cyclictest	0	-21	swapper/7	11:56:40	7
2302037	99	27	0,26	cyclictest	2845496	-21	latency_hist	11:13:59	7
2302032	99	27	25,2	cyclictest	2868731	-21	kworker/u16:2+events_unbound	12:09:28	6
2302032	99	27	25,2	cyclictest	2722983	-21	kworker/u16:3+events_unbound	12:01:25	6
2302032	99	27	25,2	cyclictest	2403538	-21	kworker/u16:1+events_unbound	09:08:18	6
2302027	99	27	25,2	cyclictest	2868731	-21	kworker/u16:2+events_unbound	11:43:13	4
2302027	99	27	25,2	cyclictest	2830775	-21	kworker/u16:1+events_unbound	11:16:54	4
2302027	99	27	25,2	cyclictest	2662368	-21	kworker/u16:0+events_unbound	10:17:58	4
2302027	99	27	25,2	cyclictest	2601432	-21	kworker/u16:2+events_unbound	10:06:54	4
2302032	99	26	24,2	cyclictest	2747699	-21	kworker/u16:4+events_unbound	10:43:52	6
2302032	99	26	24,2	cyclictest	2481377	-21	kworker/u16:0+events_unbound	08:56:54	6
2302032	99	26	24,2	cyclictest	2441974	-21	kworker/u16:2+events_unbound	08:28:18	6
2302032	99	26	24,2	cyclictest	2403538	-21	kworker/u16:1+flush-8:0	08:16:22	6
2302027	99	26	24,2	cyclictest	2722983	-21	kworker/u16:3+events_unbound	10:44:53	4
2302027	99	26	24,2	cyclictest	2573319	-21	kworker/u16:6+events_unbound	09:26:54	4
2302037	99	25	24,0	cyclictest	0	-21	swapper/7	09:15:28	7
2302037	99	25	24,0	cyclictest	0	-21	swapper/7	07:25:58	7
2302032	99	25	23,2	cyclictest	2989825	-21	kworker/u16:1+flush-8:0	12:14:27	6
2302032	99	25	23,2	cyclictest	2868731	-21	kworker/u16:2+flush-8:0	12:20:10	6
2302032	99	25	23,2	cyclictest	2708617	-21	kworker/u16:1+flush-8:0	10:24:37	6
2302032	99	25	23,2	cyclictest	2520162	-21	kworker/u16:3+events_unbound	09:01:24	6
2302032	99	25	23,2	cyclictest	2403538	-21	kworker/u16:1+flush-8:0	09:14:45	6
2302032	99	25	23,2	cyclictest	2364269	-21	kworker/u16:0+events_unbound	07:47:26	6
2302037	99	24	22,1	cyclictest	0	-21	swapper/7	07:19:15	7
2302037	99	24	0,22	cyclictest	650	-21	systemd-journal	09:38:54	7
2302032	99	24	22,2	cyclictest	2573319	-21	kworker/u16:6+events_unbound	09:22:56	6
2302032	99	24	22,2	cyclictest	2481377	-21	kworker/u16:0+events_unbound	08:51:30	6
2302032	99	24	22,2	cyclictest	2364269	-21	kworker/u16:0+events_unbound	07:57:18	6
2302032	99	24	22,2	cyclictest	2334171	-21	kworker/u16:1+events_unbound	07:40:55	6
2302032	99	24	22,2	cyclictest	2302229	-21	kworker/u16:4+events_unbound	08:40:43	6
2302032	99	24	22,2	cyclictest	2302229	-21	kworker/u16:4+events_unbound	08:38:59	6
2302032	99	24	21,2	cyclictest	2302229	-21	kworker/u16:4+events_unbound	08:19:07	6
2302032	99	24	21,2	cyclictest	2302229	-21	kworker/u16:4+events_unbound	08:19:07	6
2302029	99	24	22,2	cyclictest	2601432	-21	kworker/u16:2+flush-8:0	10:29:29	5
2302027	99	24	22,2	cyclictest	3017045	-21	kworker/u16:4+flush-8:0	12:37:45	4
2302027	99	24	22,2	cyclictest	2868731	-21	kworker/u16:2+events_unbound	12:18:31	4
2302027	99	24	22,2	cyclictest	2722983	-21	kworker/u16:3+flush-8:0	10:59:42	4
2302027	99	24	22,2	cyclictest	2662368	-21	kworker/u16:0+events_unbound	10:11:14	4
2302037	99	23	22,0	cyclictest	0	-21	swapper/7	12:10:27	7
2302037	99	23	22,0	cyclictest	0	-21	swapper/7	11:53:48	7
2302037	99	23	21,1	cyclictest	2831275	-21	ssh	11:05:25	7
2302032	99	23	21,2	cyclictest	2794804	-21	kworker/u16:0+events_unbound	11:10:23	6
2302032	99	23	21,2	cyclictest	2722983	-21	kworker/u16:3+flush-8:0	12:05:40	6
2302032	99	23	21,2	cyclictest	2364269	-21	kworker/u16:0+events_unbound	07:52:36	6
2302032	99	23	21,2	cyclictest	2334171	-21	kworker/u16:1+events_unbound	07:36:02	6
2302032	99	23	21,2	cyclictest	2302229	-21	kworker/u16:4+events_unbound	08:33:15	6
2302027	99	23	21,2	cyclictest	2421652	-21	kworker/u16:3+flush-8:0	08:08:54	4
2302037	99	22	21,0	cyclictest	0	-21	swapper/7	10:24:32	7
2302037	99	22	21,0	cyclictest	0	-21	swapper/7	07:52:58	7
2302037	99	22	21,0	cyclictest	0	-21	swapper/7	07:43:06	7
2302037	99	22	21,0	cyclictest	0	-21	swapper/7	07:11:34	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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