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 Sun Apr 26, 2026 12:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2427683	2	58	47,8	sleep5	0	-21	swapper/5	07:07:49	5
2428072	99	50	44,5	cyclictest	3051652	-21	latency_hist	11:49:13	7
2427559	2	45	35,7	sleep4	0	-21	swapper/4	07:06:03	4
2965998	2	44	0,0	sleep7	2965996	-21	ssh	11:13:19	7
2428065	99	42	39,2	cyclictest	3015210	-21	kworker/u16:4+events_unbound	11:39:18	4
2428072	99	41	36,4	cyclictest	2917864	-21	latency_hist	10:54:13	7
2426863	2	41	3,31	sleep7	0	-21	swapper/7	07:04:46	7
2428066	99	39	38,1	cyclictest	2735519	-21	kworker/u16:3+flush-8:0	10:04:13	5
2428068	99	36	34,2	cyclictest	2699308	-21	kworker/u16:4+events_unbound	09:33:23	6
2428068	99	35	33,2	cyclictest	2633247	-21	kworker/u16:1+flush-8:0	08:54:13	6
2428065	99	35	33,2	cyclictest	3015210	-21	kworker/u16:4+flush-8:0	11:53:31	4
2428065	99	35	33,2	cyclictest	2699307	-21	kworker/u16:0+flush-8:0	10:24:13	4
2428065	99	33	31,2	cyclictest	2964339	-21	kworker/u16:1+events_unbound	12:11:23	4
2428065	99	33	31,2	cyclictest	2735519	-21	kworker/u16:3+events_unbound	10:02:24	4
2428065	99	33	31,2	cyclictest	2633247	-21	kworker/u16:1+events_unbound	09:22:24	4
2428068	99	32	30,2	cyclictest	2735519	-21	kworker/u16:3+events_unbound	09:52:24	6
2428068	99	32	29,3	cyclictest	3100145	-21	kworker/u16:2+flush-8:0	12:24:35	6
2428065	99	32	30,2	cyclictest	2843656	-21	kworker/u16:2+events_unbound	11:14:23	4
2428065	99	32	29,2	cyclictest	2843656	-21	kworker/u16:2+events_unbound	11:09:16	4
2427675	2	32	22,7	sleep6	0	-21	swapper/6	07:07:42	6
2428068	99	31	29,2	cyclictest	2633869	-21	kworker/u16:2+flush-8:0	09:29:13	6
2428068	99	31	29,2	cyclictest	2633869	-21	kworker/u16:2+flush-8:0	09:29:13	6
2428065	99	31	29,2	cyclictest	2699307	-21	kworker/u16:0+flush-8:0	09:49:24	4
2428072	99	30	24,5	cyclictest	3100188	-21	latency_hist	12:09:13	7
2428065	99	30	28,2	cyclictest	2964339	-21	kworker/u16:1+events_unbound	11:19:16	4
2428065	99	30	28,2	cyclictest	2906210	-21	kworker/u16:0+flush-8:0	11:04:48	4
2428065	99	30	28,2	cyclictest	2808879	-21	kworker/u16:4+events_unbound	10:34:35	4
2428065	99	30	27,3	cyclictest	3084895	-21	kworker/u16:0+events_unbound	12:00:24	4
2428068	99	29	27,2	cyclictest	2843656	-21	kworker/u16:2+events_unbound	11:44:07	6
2428068	99	29	27,2	cyclictest	2808879	-21	kworker/u16:4+events_unbound	10:36:11	6
2428068	99	29	27,2	cyclictest	2699307	-21	kworker/u16:0+flush-8:0	10:18:22	6
2428065	99	29	27,2	cyclictest	2808879	-21	kworker/u16:4+events_unbound	10:59:30	4
2428065	99	29	26,2	cyclictest	2964339	-21	kworker/u16:1+events_unbound	12:14:15	4
2428072	99	28	23,4	cyclictest	2954409	-21	latency_hist	11:09:14	7
2428072	99	28	0,26	cyclictest	3148764	-21	/usr/sbin/munin	12:29:13	7
2428068	99	28	26,2	cyclictest	2633869	-21	kworker/u16:2+events_unbound	09:18:28	6
2428068	99	28	26,2	cyclictest	2633247	-21	kworker/u16:1+flush-8:0	09:09:09	6
2428065	99	28	26,2	cyclictest	3100145	-21	kworker/u16:2+flush-8:0	12:24:47	4
2428065	99	28	25,2	cyclictest	3136680	-21	kworker/u16:4+events_unbound	12:34:13	4
2428068	99	27	26,1	cyclictest	2964339	-21	kworker/u16:1+events_unbound	11:12:39	6
2428068	99	27	25,2	cyclictest	2808879	-21	kworker/u16:4+events_unbound	11:04:37	6
2428068	99	27	25,2	cyclictest	2633869	-21	kworker/u16:2+events_unbound	10:00:15	6
2428068	99	27	24,3	cyclictest	2856521	-21	kworker/u16:1+flush-8:0	10:29:31	6
2428066	99	27	25,2	cyclictest	2699307	-21	kworker/u16:0+flush-8:0	09:44:47	5
2428065	99	27	25,2	cyclictest	3003155	-21	kworker/u16:0+events_unbound	11:46:24	4
2428065	99	27	24,2	cyclictest	2735519	-21	kworker/u16:3+flush-8:0	10:04:23	4
2428065	99	27	24,2	cyclictest	2735519	-21	kworker/u16:3+flush-8:0	10:04:23	4
2428068	99	26	24,2	cyclictest	2906210	-21	kworker/u16:0+events_unbound	10:54:07	6
2428068	99	26	24,2	cyclictest	2843656	-21	kworker/u16:2+flush-8:0	11:24:43	6
2428068	99	26	23,2	cyclictest	3015210	-21	kworker/u16:4+events_unbound	11:54:15	6
2428065	99	26	24,2	cyclictest	2633869	-21	kworker/u16:2+events_unbound	09:58:59	4
2428065	99	26	24,2	cyclictest	2427637	-21	kworker/u16:0+events_unbound	07:19:09	4
2428072	99	25	24,0	cyclictest	0	-21	swapper/7	08:39:39	7
2428068	99	25	23,2	cyclictest	3136680	-21	kworker/u16:4+flush-8:0	12:34:28	6
2428068	99	25	23,2	cyclictest	3063177	-21	kworker/u16:3+flush-8:0	12:14:25	6
2428068	99	25	23,2	cyclictest	3015210	-21	kworker/u16:4+events_unbound	11:49:00	6
2428068	99	25	23,2	cyclictest	2843656	-21	kworker/u16:2+events_unbound	11:03:03	6
2428068	99	25	23,2	cyclictest	2699307	-21	kworker/u16:0+events_unbound	10:23:03	6
2428068	99	25	23,2	cyclictest	2633869	-21	kworker/u16:2+events_unbound	08:59:13	6
2428068	99	25	22,2	cyclictest	2567425	-21	kworker/u16:0+flush-8:0	08:34:14	6
2428065	99	25	23,2	cyclictest	3063177	-21	kworker/u16:3+events_unbound	11:58:23	4
2428065	99	25	23,2	cyclictest	2964339	-21	kworker/u16:1+events_unbound	12:09:10	4
2428065	99	25	23,2	cyclictest	2808879	-21	kworker/u16:4+events_unbound	10:57:07	4
2428068	99	24	22,2	cyclictest	2964339	-21	kworker/u16:1+events_unbound	12:19:14	6
2428068	99	24	22,2	cyclictest	2964339	-21	kworker/u16:1+events_unbound	11:59:47	6
2428068	99	24	22,2	cyclictest	2964339	-21	kworker/u16:1+events_unbound	11:30:15	6
2428068	99	24	21,3	cyclictest	2479824	-21	kworker/u16:2+events_unbound	07:39:44	6
2428066	99	24	21,2	cyclictest	2964339	-21	kworker/u16:1+flush-8:0	11:59:31	5
2428065	99	24	22,2	cyclictest	2856521	-21	kworker/u16:1+events_unbound	10:46:24	4
2428065	99	24	22,2	cyclictest	2856521	-21	kworker/u16:1+events_unbound	10:46:24	4
2428065	99	24	22,2	cyclictest	2856521	-21	kworker/u16:1+events_unbound	10:40:23	4
2428065	99	24	22,2	cyclictest	2808879	-21	kworker/u16:4+events_unbound	10:30:23	4
2428065	99	24	22,2	cyclictest	2808262	-21	kworker/u16:1+flush-8:0	10:10:26	4
2428065	99	24	22,2	cyclictest	2699308	-21	kworker/u16:4+events_unbound	09:30:23	4
2428072	99	23	21,1	cyclictest	0	-21	swapper/7	12:19:26	7
2428068	99	23	22,1	cyclictest	0	-21	swapper/6	09:56:24	6
2428068	99	23	21,2	cyclictest	3015210	-21	kworker/u16:4+events_unbound	11:38:39	6
2428065	99	23	21,2	cyclictest	2808262	-21	kworker/u16:1+flush-8:0	10:15:23	4
2428065	99	23	21,2	cyclictest	2567425	-21	kworker/u16:0+events_unbound	09:15:24	4
2428065	99	23	21,1	cyclictest	2964339	-21	kworker/u16:1+events_unbound	11:29:22	4
2428068	99	22	20,2	cyclictest	3136432	-21	kworker/u16:0+events_unbound	12:30:20	6
2428068	99	22	20,2	cyclictest	2964339	-21	kworker/u16:1+events_unbound	12:09:32	6
2428068	99	22	20,2	cyclictest	2843656	-21	kworker/u16:2+events_unbound	11:50:40	6
2428068	99	22	20,2	cyclictest	2633869	-21	kworker/u16:2+flush-8:0	09:19:40	6
2428068	99	22	20,2	cyclictest	2633869	-21	kworker/u16:2+events_unbound	09:43:44	6
2428068	99	21	19,2	cyclictest	2856521	-21	kworker/u16:1+flush-8:0	10:44:33	6
2428068	99	21	19,2	cyclictest	2856521	-21	kworker/u16:1+flush-8:0	10:44:33	6
2428068	99	21	19,2	cyclictest	2808879	-21	kworker/u16:4+events_unbound	10:27:48	6
2428068	99	21	19,2	cyclictest	2735519	-21	kworker/u16:3+events_unbound	09:48:00	6
2428068	99	21	19,2	cyclictest	2633869	-21	kworker/u16:2+events_unbound	09:34:19	6
2428068	99	21	19,2	cyclictest	2437558	-21	kworker/u16:3+flush-8:0	08:24:35	6
2428068	99	21	18,2	cyclictest	2546014	-21	kworker/u16:5+flush-8:0	08:09:33	6
2428065	99	21	19,2	cyclictest	2964339	-21	kworker/u16:1+events_unbound	12:22:59	4
2428065	99	21	19,2	cyclictest	2633869	-21	kworker/u16:2+flush-8:0	09:11:03	4
2428065	99	21	19,2	cyclictest	2633869	-21	kworker/u16:2+events_unbound	09:34:15	4
2428072	99	20	17,2	cyclictest	2604827	-21	cat	08:39:13	7
2428068	99	20	18,2	cyclictest	2567425	-21	kworker/u16:0+events_unbound	09:13:31	6
2428066	99	20	18,2	cyclictest	2633869	-21	kworker/u16:2+flush-8:0	09:19:01	5
2428072	99	19	14,3	cyclictest	124	-21	kswapd0	08:00:24	7
2428072	99	19	14,3	cyclictest	124	-21	kswapd0	08:00:24	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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