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 Feb 07, 2026 00:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2764230	2	59	48,7	sleep5	0	-21	swapper/5	19:01:14	5
2764230	2	59	48,7	sleep5	0	-21	swapper/5	19:01:14	5
2773353	2	55	45,7	sleep6	0	-21	swapper/6	19:05:24	6
2773353	2	55	45,7	sleep6	0	-21	swapper/6	19:05:24	6
2773689	99	52	48,3	cyclictest	3227510	-21	kworker/u16:1+events_unbound	22:41:12	5
2773103	2	51	40,7	sleep4	0	-21	swapper/4	19:01:54	4
2773103	2	51	40,7	sleep4	0	-21	swapper/4	19:01:54	4
2773689	99	45	42,2	cyclictest	3108197	-21	kworker/u16:3+flush-8:0	21:51:39	5
2773689	99	44	41,2	cyclictest	3108197	-21	kworker/u16:3+flush-8:0	21:51:12	5
2773702	99	41	0,39	cyclictest	3352987	-21	latency_hist	23:31:11	7
2773689	99	41	39,2	cyclictest	3462128	-21	kworker/u16:4+events_unbound	00:21:06	5
2773192	2	39	6,29	sleep7	0	-21	swapper/7	19:03:09	7
2773192	2	39	6,29	sleep7	0	-21	swapper/7	19:03:09	7
2773702	99	37	31,5	cyclictest	2960813	-21	latency_hist	20:41:12	7
2773689	99	34	32,2	cyclictest	2990914	-21	kworker/u16:1+events_unbound	21:07:26	5
2773702	99	33	27,5	cyclictest	650	-21	systemd-journal	21:31:11	7
2773689	99	33	31,2	cyclictest	3462127	-21	kworker/u16:3+flush-8:0	00:26:11	5
3051304	2	31	0,1	sleep7	0	-21	swapper/7	21:21:30	7
2773702	99	31	0,30	cyclictest	3413771	-21	latency_hist	23:56:12	7
2773689	99	31	30,1	cyclictest	3094706	-21	kworker/u16:1+events_unbound	21:44:43	5
2773689	99	31	29,2	cyclictest	3031296	-21	kworker/u16:2+events_unbound	22:11:43	5
2773689	99	31	28,2	cyclictest	3108197	-21	kworker/u16:3+flush-8:0	21:57:16	5
2773702	99	30	24,5	cyclictest	3021257	-21	latency_hist	21:11:12	7
2773702	99	30	0,29	cyclictest	3401597	-21	latency_hist	23:51:12	7
2773702	99	30	0,29	cyclictest	3215950	-21	latency_hist	22:31:12	7
2773689	99	30	28,2	cyclictest	3031296	-21	kworker/u16:2+events_unbound	21:24:43	5
2773685	99	30	27,2	cyclictest	3094706	-21	kworker/u16:1+flush-8:0	21:46:46	4
3495373	2	29	0,1	chrt	3495374	-21	kthreadcore	00:26:34	7
2773689	99	29	27,2	cyclictest	3176989	-21	kworker/u16:3+events_unbound	22:28:10	5
2773689	99	29	27,2	cyclictest	3155524	-21	kworker/u16:1+events_unbound	22:17:18	5
2773689	99	29	27,2	cyclictest	3155524	-21	kworker/u16:1+events_unbound	22:17:18	5
2773685	99	29	27,2	cyclictest	3311084	-21	kworker/u16:0+events_unbound	23:26:25	4
3438049	2	28	0,1	chrt	3438050	-21	sh	00:06:06	7
2773689	99	28	26,2	cyclictest	2806721	-21	kworker/u16:0+flush-8:0	19:31:30	5
3340058	2	27	0,1	chrt	3340057	-21	ssh	23:24:47	7
2773689	99	27	25,2	cyclictest	3414202	-21	kworker/u16:4+flush-8:0	00:01:18	5
2773689	99	27	25,2	cyclictest	3018811	-21	kworker/u16:0+events_unbound	21:37:22	5
2773689	99	27	25,2	cyclictest	3018811	-21	kworker/u16:0+events_unbound	21:37:22	5
3375130	2	26	0,1	chrt	3375131	-21	ssh	23:37:13	7
3375130	2	26	0,1	chrt	3375131	-21	ssh	23:37:13	7
2773702	99	26	0,1	cyclictest	0	-21	swapper/7	22:46:35	7
2773689	99	26	24,2	cyclictest	2826049	-21	kworker/u16:3+events_unbound	21:01:32	5
2773689	99	26	24,2	cyclictest	2787398	-21	kworker/u16:4+flush-8:0	19:16:26	5
2773689	99	26	23,2	cyclictest	3311084	-21	kworker/u16:0+flush-8:0	23:31:16	5
2773689	99	25	23,2	cyclictest	3311084	-21	kworker/u16:0+flush-8:0	23:16:12	5
2773689	99	25	23,2	cyclictest	2806721	-21	kworker/u16:0+flush-8:0	19:31:07	5
2773689	99	25	23,2	cyclictest	2806721	-21	kworker/u16:0+flush-8:0	19:31:07	5
2773685	99	25	23,2	cyclictest	2961196	-21	kworker/u16:0+events_unbound	20:51:26	4
2773702	99	24	18,5	cyclictest	2883568	-21	latency_hist	20:01:12	7
2773685	99	24	22,2	cyclictest	3031296	-21	kworker/u16:2+flush-8:0	21:25:12	4
2773685	99	24	21,2	cyclictest	2806721	-21	kworker/u16:0+flush-8:0	19:31:12	4
2773685	99	24	21,2	cyclictest	2806721	-21	kworker/u16:0+flush-8:0	19:31:12	4
2773702	99	23	22,0	cyclictest	0	-21	swapper/7	20:01:27	7
2773702	99	23	17,5	cyclictest	650	-21	systemd-journal	21:56:12	7
2773689	99	23	21,2	cyclictest	3362713	-21	kworker/u16:1+flush-8:0	23:51:49	5
2773689	99	22	20,2	cyclictest	3462128	-21	kworker/u16:4+events_unbound	00:30:21	5
2773689	99	22	20,2	cyclictest	3311084	-21	kworker/u16:0+events_unbound	23:48:59	5
2773689	99	22	20,2	cyclictest	3176989	-21	kworker/u16:3+events_unbound	22:34:59	5
2773689	99	22	20,2	cyclictest	2826049	-21	kworker/u16:3+events_unbound	21:11:22	5
2773689	99	22	20,2	cyclictest	2826049	-21	kworker/u16:3+events_unbound	20:11:34	5
2773685	99	22	19,2	cyclictest	3031296	-21	kworker/u16:2+events_unbound	21:31:28	4
2773702	99	21	0,20	cyclictest	3486772	-21	latency_hist	00:26:11	7
2773689	99	21	19,2	cyclictest	3311084	-21	kworker/u16:0+events_unbound	00:33:21	5
2773689	99	21	19,2	cyclictest	3311084	-21	kworker/u16:0+events_unbound	00:06:42	5
2773689	99	21	19,2	cyclictest	3240804	-21	kworker/u16:2+flush-8:0	23:21:07	5
2773689	99	21	19,2	cyclictest	3192029	-21	kworker/u16:4+events_unbound	22:46:42	5
2773685	99	21	19,2	cyclictest	3311084	-21	kworker/u16:0+events_unbound	00:21:35	4
2773702	99	20	19,0	cyclictest	0	-21	swapper/7	20:06:28	7
2773689	99	20	19,1	cyclictest	3044500	-21	kworker/u16:3+events_unbound	21:20:14	5
2773689	99	20	18,2	cyclictest	3311084	-21	kworker/u16:0+events_unbound	23:31:10	5
2773689	99	20	18,2	cyclictest	3240804	-21	kworker/u16:2+events_unbound	23:06:27	5
2773689	99	20	18,2	cyclictest	3227510	-21	kworker/u16:1+events_unbound	22:43:58	5
2773689	99	20	18,2	cyclictest	3192029	-21	kworker/u16:4+events_unbound	22:25:07	5
2773685	99	20	18,2	cyclictest	3316596	-21	kworker/u16:1+flush-8:0	23:22:13	4
3201610	2	19	0,0	sleep7	3201608	-21	ssh	22:22:12	7
2773702	99	19	15,3	cyclictest	1267	-21	snmpd	21:05:23	7
2773702	99	19	14,4	cyclictest	3289110	-21	latency_hist	23:01:11	7
2773702	99	19	14,4	cyclictest	3289110	-21	latency_hist	23:01:11	7
2773689	99	19	17,2	cyclictest	3031296	-21	kworker/u16:2+events_unbound	22:06:42	5
2773689	99	19	17,2	cyclictest	3018811	-21	kworker/u16:0+flush-8:0	21:32:10	5
2773689	99	19	17,2	cyclictest	2990914	-21	kworker/u16:1+events_unbound	20:56:35	5
2773689	99	19	17,2	cyclictest	2901902	-21	kworker/u16:2+events_unbound	20:21:38	5
2773689	99	19	17,2	cyclictest	2773903	-21	kworker/u16:3+flush-8:0	19:06:38	5
2773689	99	19	16,2	cyclictest	3031296	-21	kworker/u16:2+events_unbound	22:01:18	5
2773689	99	19	15,3	cyclictest	3031296	-21	kworker/u16:2+events_unbound	21:26:35	5
2773685	99	19	17,2	cyclictest	3155524	-21	kworker/u16:1+events_unbound	22:11:26	4
2773702	99	18	9,8	cyclictest	0	-21	swapper/7	23:41:23	7
2773702	99	18	17,0	cyclictest	0	-21	swapper/7	20:46:37	7
2773702	99	18	13,4	cyclictest	650	-21	systemd-journal	23:11:12	7
2773702	99	18	12,5	cyclictest	3313456	-21	latency_hist	23:11:12	7
2773702	99	18	0,16	cyclictest	3325490	-21	ssh	23:16:29	7
2773689	99	18	16,2	cyclictest	3311084	-21	kworker/u16:0+events_unbound	23:38:47	5
2773689	99	18	16,2	cyclictest	3311084	-21	kworker/u16:0+events_unbound	23:38:47	5
2773685	99	18	16,2	cyclictest	3362713	-21	kworker/u16:1+flush-8:0	23:51:34	4
2773685	99	18	16,2	cyclictest	3129855	-21	kworker/u16:5+events_unbound	21:56:25	4
2773702	99	17	8,8	cyclictest	0	-21	swapper/7	00:16:36	7
2773702	99	17	8,8	cyclictest	0	-21	swapper/7	00:11:37	7
2773702	99	17	15,1	cyclictest	0	-21	swapper/7	21:51:12	7
2773702	99	17	0,16	cyclictest	3009100	-21	diskmemload	22:51:35	7
2773689	99	17	15,2	cyclictest	3449176	-21	kworker/u16:1+flush-8:0	00:11:32	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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