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 Tue Feb 10, 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
3042418	2	102	0,1	sleep6	0	-21	swapper/6	22:46:21	6
3108351	2	95	0,1	sleep7	3108353	-21	ssh	23:14:59	7
2557127	2	67	57,7	sleep4	0	-21	swapper/4	19:03:51	4
2556958	2	54	19,30	sleep7	0	-21	swapper/7	19:01:38	7
2557034	2	53	43,7	sleep5	0	-21	swapper/5	19:02:32	5
2557102	2	52	42,7	sleep6	0	-21	swapper/6	19:03:29	6
2557582	99	49	47,2	cyclictest	2913576	-21	kworker/u16:5+flush-8:0	22:56:30	6
2557577	99	48	45,2	cyclictest	2913576	-21	kworker/u16:5+flush-8:0	22:41:28	4
2557577	99	48	45,2	cyclictest	2913576	-21	kworker/u16:5+flush-8:0	22:41:28	4
2557584	99	47	42,4	cyclictest	2890329	-21	latency_hist	21:46:00	7
2557582	99	46	44,2	cyclictest	2580734	-21	kworker/u16:2+flush-8:0	19:56:00	6
2557582	99	46	44,2	cyclictest	2580734	-21	kworker/u16:2+flush-8:0	19:56:00	6
2557578	99	45	42,2	cyclictest	2913576	-21	kworker/u16:5+flush-8:0	22:46:28	5
2557577	99	44	41,2	cyclictest	3082567	-21	kworker/u16:1+events_unbound	23:16:16	4
2557582	99	39	37,2	cyclictest	3082567	-21	kworker/u16:1+flush-8:0	23:51:17	6
2557582	99	39	37,2	cyclictest	3061115	-21	kworker/u16:0+events_unbound	23:31:32	6
2557582	99	39	37,2	cyclictest	2839520	-21	kworker/u16:1+flush-8:0	22:15:17	6
2557577	99	39	36,2	cyclictest	2984442	-21	kworker/u16:6+events_unbound	22:31:15	4
2557578	99	38	36,2	cyclictest	3082567	-21	kworker/u16:1+flush-8:0	23:05:55	5
2557577	99	37	36,1	cyclictest	3061115	-21	kworker/u16:0+events_unbound	00:16:27	4
2557577	99	37	36,1	cyclictest	2975969	-21	kworker/u16:4+events_unbound	22:37:16	4
2557577	99	36	34,2	cyclictest	3082567	-21	kworker/u16:1+flush-8:0	00:31:28	4
2557582	99	35	33,2	cyclictest	3082567	-21	kworker/u16:1+events_unbound	23:57:04	6
2557578	99	35	33,2	cyclictest	3061115	-21	kworker/u16:0+flush-8:0	23:30:55	5
2557577	99	34	32,2	cyclictest	3061115	-21	kworker/u16:0+flush-8:0	23:31:17	4
2557577	99	34	32,2	cyclictest	2913576	-21	kworker/u16:5+events_unbound	23:41:32	4
2557584	99	33	28,4	cyclictest	650	-21	systemd-journal	21:15:59	7
2557577	99	33	31,2	cyclictest	3205025	-21	kworker/u16:2+events_unbound	23:56:23	4
2557578	99	32	30,2	cyclictest	3250043	-21	kworker/u16:2+events_unbound	00:22:23	5
2557577	99	32	30,2	cyclictest	3082567	-21	kworker/u16:1+events_unbound	00:30:59	4
2557577	99	32	29,2	cyclictest	2839520	-21	kworker/u16:1+flush-8:0	22:16:00	4
2557582	99	31	29,2	cyclictest	3082567	-21	kworker/u16:1+events_unbound	23:16:31	6
2557578	99	31	30,1	cyclictest	2735488	-21	kworker/u16:0+events_unbound	21:38:39	5
2557577	99	31	29,2	cyclictest	2839520	-21	kworker/u16:1+events_unbound	21:41:23	4
2557584	99	30	30,0	cyclictest	0	-21	swapper/7	23:20:14	7
2557584	99	30	0,29	cyclictest	124	-21	kswapd0	00:24:26	7
2557582	99	30	28,2	cyclictest	3263016	-21	kworker/u16:3+flush-8:0	00:26:29	6
2557577	99	30	28,2	cyclictest	3061115	-21	kworker/u16:0+events_unbound	00:06:27	4
2557577	99	30	28,2	cyclictest	2975969	-21	kworker/u16:4+flush-8:0	22:51:15	4
2557582	99	29	27,2	cyclictest	3061115	-21	kworker/u16:0+events_unbound	23:36:31	6
2557582	99	29	27,2	cyclictest	3061115	-21	kworker/u16:0+events_unbound	23:21:28	6
2557582	99	29	27,2	cyclictest	2975969	-21	kworker/u16:4+flush-8:0	22:36:15	6
2557578	99	29	27,2	cyclictest	2538119	-21	kworker/u16:3+flush-8:0	21:16:25	5
2557577	99	29	28,1	cyclictest	2975969	-21	kworker/u16:4+events_unbound	22:24:19	4
2557577	99	29	27,2	cyclictest	3250043	-21	kworker/u16:2+flush-8:0	00:21:31	4
2557584	99	28	26,1	cyclictest	3070717	-21	ssh	22:57:05	7
2557584	99	28	22,5	cyclictest	2754414	-21	latency_hist	20:46:00	7
2557578	99	28	25,3	cyclictest	2913576	-21	kworker/u16:5+flush-8:0	22:06:26	5
2557577	99	28	26,2	cyclictest	2725431	-21	kworker/u16:4+events_unbound	21:49:24	4
2557577	99	28	25,3	cyclictest	3082567	-21	kworker/u16:1+events_unbound	23:48:36	4
2557584	99	27	22,4	cyclictest	2628895	-21	latency_hist	19:41:00	7
2557582	99	27	25,2	cyclictest	2538119	-21	kworker/u16:3+events_unbound	21:17:11	6
2557582	99	27	25,2	cyclictest	2250671	-21	kworker/u16:1+flush-8:0	19:21:27	6
2557578	99	27	24,2	cyclictest	2725431	-21	kworker/u16:4+events_unbound	21:56:14	5
2557578	99	27	23,3	cyclictest	2839520	-21	kworker/u16:1+events_unbound	22:01:29	5
2557577	99	27	25,2	cyclictest	2839520	-21	kworker/u16:1+events_unbound	22:16:22	4
2557577	99	27	25,2	cyclictest	2839520	-21	kworker/u16:1+events_unbound	21:29:24	4
2557577	99	27	25,2	cyclictest	2725431	-21	kworker/u16:4+events_unbound	21:36:22	4
2557577	99	27	24,3	cyclictest	2878258	-21	kworker/u16:2+flush-8:0	22:00:59	4
2901778	2	26	0,1	chrt	2901777	-21	ssh	21:49:40	7
2557584	99	26	25,0	cyclictest	0	-21	swapper/7	23:26:06	7
2557582	99	26	23,2	cyclictest	3061115	-21	kworker/u16:0+flush-8:0	00:16:06	6
2557578	99	26	24,2	cyclictest	2984442	-21	kworker/u16:6+flush-8:0	22:26:42	5
2557578	99	26	23,2	cyclictest	2538119	-21	kworker/u16:3+flush-8:0	21:21:32	5
2557577	99	26	24,2	cyclictest	2580734	-21	kworker/u16:2+events_unbound	19:46:22	4
2557584	99	25	24,0	cyclictest	0	-21	swapper/7	19:26:03	7
2557582	99	25	23,2	cyclictest	2913576	-21	kworker/u16:5+flush-8:0	22:06:06	6
2557582	99	25	23,2	cyclictest	2878258	-21	kworker/u16:2+events_unbound	21:47:48	6
2557582	99	25	23,2	cyclictest	2839520	-21	kworker/u16:1+flush-8:0	21:51:31	6
2557578	99	25	23,2	cyclictest	3082567	-21	kworker/u16:1+flush-8:0	23:51:42	5
2557578	99	25	23,2	cyclictest	2878258	-21	kworker/u16:2+events_unbound	21:46:14	5
2557578	99	25	23,2	cyclictest	2878258	-21	kworker/u16:2+events_unbound	21:41:13	5
2557578	99	25	23,2	cyclictest	2538119	-21	kworker/u16:3+flush-8:0	19:26:00	5
2557577	99	25	21,3	cyclictest	2984442	-21	kworker/u16:6+flush-8:0	22:31:01	4
2557582	99	24	22,2	cyclictest	3061115	-21	kworker/u16:0+flush-8:0	00:06:29	6
2557582	99	24	22,2	cyclictest	2913576	-21	kworker/u16:5+flush-8:0	22:25:55	6
2557582	99	24	22,2	cyclictest	2839520	-21	kworker/u16:1+events_unbound	22:16:28	6
2557578	99	24	22,2	cyclictest	2580734	-21	kworker/u16:2+events_unbound	20:11:37	5
2557577	99	24	22,2	cyclictest	3082567	-21	kworker/u16:1+events_unbound	00:05:31	4
2557577	99	24	22,2	cyclictest	2913576	-21	kworker/u16:5+events_unbound	23:25:56	4
2557584	99	23	22,0	cyclictest	0	-21	swapper/7	20:57:11	7
2557584	99	23	22,0	cyclictest	0	-21	swapper/7	20:39:55	7
2557584	99	23	21,1	cyclictest	0	-21	swapper/7	22:36:00	7
2557582	99	23	21,2	cyclictest	3082567	-21	kworker/u16:1+events_unbound	00:04:20	6
2557582	99	23	21,2	cyclictest	2580734	-21	kworker/u16:2+flush-8:0	20:06:21	6
2557582	99	23	21,2	cyclictest	2250671	-21	kworker/u16:1+events_unbound	19:11:23	6
2557582	99	23	20,2	cyclictest	3180998	-21	kworker/u16:4+events_unbound	23:46:14	6
2557577	99	23	21,2	cyclictest	2696652	-21	kworker/u16:1+flush-8:0	20:16:29	4
2557584	99	22	21,0	cyclictest	0	-21	swapper/7	20:54:44	7
2557584	99	22	21,0	cyclictest	0	-21	swapper/7	20:33:36	7
2557584	99	22	21,0	cyclictest	0	-21	swapper/7	20:02:28	7
2557584	99	22	21,0	cyclictest	0	-21	swapper/7	19:22:08	7
2557584	99	22	20,1	cyclictest	3246495	-21	cut	00:11:20	7
2557584	99	22	0,21	cyclictest	2853866	-21	latency_hist	21:31:00	7
2557582	99	22	20,2	cyclictest	3061115	-21	kworker/u16:0+flush-8:0	23:11:27	6
2557582	99	22	19,2	cyclictest	2839520	-21	kworker/u16:1+events_unbound	22:01:07	6
2557578	99	22	20,2	cyclictest	2913576	-21	kworker/u16:5+flush-8:0	22:45:54	5
2557578	99	22	20,2	cyclictest	2913576	-21	kworker/u16:5+flush-8:0	22:45:54	5
2557578	99	22	19,3	cyclictest	3082567	-21	kworker/u16:1+flush-8:0	00:01:30	5
2557578	99	22	19,3	cyclictest	2735488	-21	kworker/u16:0+flush-8:0	20:41:31	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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