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 Feb 26, 2026 00:43:36)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2692833	2	288	0,5	sleep4	63	1	rcuc/4	19:00:15	4
2700807	2	49	39,7	sleep5	0	-21	swapper/5	19:04:11	5
2701158	99	43	41,2	cyclictest	2733590	-21	kworker/u16:0+flush-8:0	19:49:56	6
2701154	99	43	40,2	cyclictest	3052728	-21	kworker/u16:3+flush-8:0	22:29:56	5
2700818	2	42	2,36	sleep7	0	-21	swapper/7	19:04:21	7
2700542	2	40	29,7	sleep6	0	-21	swapper/6	19:00:35	6
2701163	99	38	34,3	cyclictest	3304574	-21	cat	23:39:56	7
2701163	99	38	33,4	cyclictest	2771719	-21	latency_hist	19:39:56	7
2701163	99	35	30,4	cyclictest	3280707	-21	latency_hist	23:29:56	7
2701154	99	34	32,2	cyclictest	3256900	-21	kworker/u16:2+events_unbound	23:30:17	5
2701154	99	34	32,2	cyclictest	2955813	-21	kworker/u16:5+flush-8:0	21:53:25	5
2701154	99	34	32,2	cyclictest	2809980	-21	kworker/u16:0+events_unbound	20:30:11	5
2701147	99	34	33,1	cyclictest	3182252	-21	kworker/u16:5+events_unbound	22:56:05	4
2701147	99	34	32,2	cyclictest	3302348	-21	kworker/u16:3+events_unbound	00:03:46	4
2701163	99	33	28,4	cyclictest	3029701	-21	latency_hist	21:44:57	7
2701154	99	33	31,2	cyclictest	2876861	-21	kworker/u16:2+events_unbound	21:00:11	5
2701163	99	32	27,4	cyclictest	3328321	-21	latency_hist	23:49:56	7
2701147	99	32	30,2	cyclictest	3161285	-21	kworker/u16:0+flush-8:0	23:05:21	4
2701147	99	32	30,2	cyclictest	2915440	-21	kworker/u16:4+events_unbound	21:45:26	4
2701158	99	31	29,2	cyclictest	3173234	-21	kworker/u16:4+flush-8:0	22:45:26	6
2701154	99	31	29,2	cyclictest	2681918	-21	kworker/u16:1+flush-8:0	19:10:17	5
2701154	99	30	28,2	cyclictest	3052728	-21	kworker/u16:3+events_unbound	22:45:10	5
2701147	99	30	28,2	cyclictest	3348020	-21	kworker/u16:4+events_unbound	00:17:17	4
2897539	2	29	0,0	chrt	2897540	-21	/usr/sbin/munin	20:45:12	4
2701158	99	29	26,2	cyclictest	3364227	-21	kworker/u16:2+events_unbound	00:15:12	6
2701154	99	29	27,2	cyclictest	3348020	-21	kworker/u16:4+flush-8:0	00:05:06	5
2701154	99	29	27,2	cyclictest	3052728	-21	kworker/u16:3+flush-8:0	22:20:19	5
2701147	99	29	27,2	cyclictest	2733590	-21	kworker/u16:0+flush-8:0	19:29:57	4
2701147	99	29	26,2	cyclictest	3111012	-21	kworker/u16:1+flush-8:0	22:35:06	4
2701147	99	29	26,2	cyclictest	3111012	-21	kworker/u16:1+flush-8:0	22:35:06	4
2701158	99	28	26,2	cyclictest	3029743	-21	kworker/u16:0+flush-8:0	22:00:24	6
2701158	99	28	26,2	cyclictest	2915440	-21	kworker/u16:4+flush-8:0	21:04:56	6
2701154	99	28	26,2	cyclictest	3399919	-21	kworker/u16:1+events_unbound	00:30:07	5
2701154	99	28	26,2	cyclictest	2733590	-21	kworker/u16:0+events_unbound	19:20:10	5
2701147	99	28	26,2	cyclictest	3364227	-21	kworker/u16:2+events_unbound	00:30:26	4
2701147	99	28	26,2	cyclictest	3256900	-21	kworker/u16:2+events_unbound	23:27:01	4
2701147	99	28	26,2	cyclictest	3182252	-21	kworker/u16:5+flush-8:0	23:14:51	4
2701147	99	28	26,2	cyclictest	3182252	-21	kworker/u16:5+flush-8:0	23:00:38	4
2701147	99	28	26,2	cyclictest	3173234	-21	kworker/u16:4+events_unbound	22:49:53	4
2701147	99	28	26,2	cyclictest	3052728	-21	kworker/u16:3+events_unbound	22:26:03	4
2701158	99	27	25,2	cyclictest	3052728	-21	kworker/u16:3+events_unbound	22:40:13	6
2701154	99	27	25,2	cyclictest	3399919	-21	kworker/u16:1+flush-8:0	00:20:21	5
2701154	99	27	25,2	cyclictest	2955813	-21	kworker/u16:5+flush-8:0	21:20:19	5
2701154	99	26	24,2	cyclictest	3302348	-21	kworker/u16:3+events_unbound	00:10:22	5
2701154	99	26	24,2	cyclictest	3052728	-21	kworker/u16:3+flush-8:0	22:15:11	5
2701154	99	26	24,2	cyclictest	2982110	-21	kworker/u16:2+events_unbound	21:40:09	5
2701147	99	26	24,2	cyclictest	3052728	-21	kworker/u16:3+flush-8:0	22:01:27	4
2701147	99	26	24,2	cyclictest	2955813	-21	kworker/u16:5+events_unbound	21:14:51	4
2701163	99	25	0,24	cyclictest	3089538	-21	latency_hist	22:09:56	7
2701158	99	25	23,2	cyclictest	2681918	-21	kworker/u16:1+events_unbound	19:09:58	6
2701154	99	25	23,2	cyclictest	2915440	-21	kworker/u16:4+flush-8:0	21:45:22	5
2701147	99	25	24,1	cyclictest	3233481	-21	kworker/u16:1+events_unbound	23:41:50	4
2701147	99	25	23,2	cyclictest	3302348	-21	kworker/u16:3+events_unbound	23:57:21	4
2701147	99	25	23,2	cyclictest	3302348	-21	kworker/u16:3+events_unbound	23:57:21	4
2701147	99	25	23,2	cyclictest	2915440	-21	kworker/u16:4+events_unbound	21:25:43	4
2701147	99	25	23,2	cyclictest	2837598	-21	kworker/u16:1+flush-8:0	20:34:51	4
2701147	99	25	22,2	cyclictest	3111012	-21	kworker/u16:1+events_unbound	22:19:59	4
2701158	99	24	22,2	cyclictest	3052728	-21	kworker/u16:3+flush-8:0	22:24:51	6
2701158	99	24	22,2	cyclictest	2982110	-21	kworker/u16:2+flush-8:0	21:35:22	6
2701158	99	24	22,2	cyclictest	1847472	-21	kworker/u16:3+events_unbound	19:15:18	6
2701154	99	24	22,2	cyclictest	3399919	-21	kworker/u16:1+events_unbound	00:25:08	5
2701154	99	24	22,2	cyclictest	3161285	-21	kworker/u16:0+flush-8:0	22:59:56	5
2701154	99	24	22,2	cyclictest	3111012	-21	kworker/u16:1+events_unbound	22:30:15	5
2701154	99	24	22,2	cyclictest	3029743	-21	kworker/u16:0+events_unbound	22:00:09	5
2701154	99	24	22,2	cyclictest	2982110	-21	kworker/u16:2+events_unbound	21:35:10	5
2701154	99	24	22,2	cyclictest	2837598	-21	kworker/u16:1+events_unbound	20:20:11	5
2701154	99	24	22,2	cyclictest	1847472	-21	kworker/u16:3+flush-8:0	19:54:51	5
2701154	99	24	22,2	cyclictest	1847472	-21	kworker/u16:3+flush-8:0	19:40:25	5
2701147	99	24	22,2	cyclictest	3256900	-21	kworker/u16:2+events_unbound	23:37:25	4
2701147	99	24	22,2	cyclictest	3256900	-21	kworker/u16:2+events_unbound	23:21:54	4
2701147	99	24	22,2	cyclictest	3052728	-21	kworker/u16:3+events_unbound	21:55:10	4
2701147	99	24	22,2	cyclictest	3052728	-21	kworker/u16:3+events_unbound	21:55:10	4
2701147	99	24	22,2	cyclictest	2955813	-21	kworker/u16:5+events_unbound	21:22:34	4
2701147	99	24	21,2	cyclictest	2733590	-21	kworker/u16:0+events_unbound	19:35:11	4
2701163	99	23	21,1	cyclictest	3221135	-21	basename	23:04:56	7
2701158	99	23	21,2	cyclictest	3182252	-21	kworker/u16:5+events_unbound	23:10:26	6
2701158	99	23	21,2	cyclictest	3173234	-21	kworker/u16:4+flush-8:0	22:50:16	6
2701158	99	23	21,2	cyclictest	1847472	-21	kworker/u16:3+flush-8:0	19:24:57	6
2701147	99	23	21,2	cyclictest	3161285	-21	kworker/u16:0+events_unbound	23:19:41	4
2701147	99	23	21,2	cyclictest	3161285	-21	kworker/u16:0+events_unbound	23:19:41	4
2701147	99	23	21,2	cyclictest	3111012	-21	kworker/u16:1+events_unbound	22:32:06	4
2701147	99	23	21,2	cyclictest	3050631	-21	kworker/u16:1+flush-8:0	21:50:24	4
2701147	99	23	21,2	cyclictest	3029743	-21	kworker/u16:0+flush-8:0	22:05:53	4
2701147	99	23	21,2	cyclictest	2982110	-21	kworker/u16:2+flush-8:0	21:35:44	4
3123562	2	22	0,1	chrt	3123563	-21	ssh	22:21:32	7
2701163	99	22	0,21	cyclictest	3149258	-21	latency_hist	22:34:56	7
2701158	99	22	20,2	cyclictest	3399919	-21	kworker/u16:1+events_unbound	00:20:14	6
2701154	99	22	20,2	cyclictest	3316435	-21	kworker/u16:0+events_unbound	23:55:08	5
2701154	99	22	20,2	cyclictest	3316435	-21	kworker/u16:0+events_unbound	23:55:08	5
2701154	99	22	20,2	cyclictest	3052728	-21	kworker/u16:3+flush-8:0	22:35:11	5
2701154	99	22	20,2	cyclictest	3052728	-21	kworker/u16:3+flush-8:0	22:35:11	5
2701154	99	22	20,2	cyclictest	2792427	-21	kworker/u16:2+flush-8:0	20:00:25	5
2701154	99	22	19,2	cyclictest	3256900	-21	kworker/u16:2+events_unbound	23:24:58	5
2701147	99	22	20,2	cyclictest	3316435	-21	kworker/u16:0+events_unbound	23:52:53	4
2701147	99	22	20,2	cyclictest	3161285	-21	kworker/u16:0+events_unbound	22:42:22	4
2701147	99	22	20,2	cyclictest	2982110	-21	kworker/u16:2+events_unbound	21:31:41	4
2701147	99	22	20,2	cyclictest	2915440	-21	kworker/u16:4+flush-8:0	21:04:51	4
2701163	99	21	20,1	cyclictest	2934182	-21	diskmemload	23:30:09	7
2701163	99	21	20,0	cyclictest	0	-21	swapper/7	22:00:11	7
2701163	99	21	0,20	cyclictest	3340200	-21	latency_hist	23:54:55	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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