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 Mon Apr 27, 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
3750314	2	52	42,7	sleep4	0	-21	swapper/4	07:05:35	4
3750363	2	46	36,7	sleep5	0	-21	swapper/5	07:06:16	5
3750845	99	45	43,2	cyclictest	4128380	-21	kworker/u16:0+flush-8:0	10:54:25	4
3750854	99	43	39,3	cyclictest	982088	-21	passimd	09:00:14	7
3750297	2	42	7,30	sleep7	0	-21	swapper/7	07:05:22	7
3750853	99	40	38,2	cyclictest	4192224	-21	kworker/u16:4+events_unbound	11:07:46	6
3750853	99	40	37,2	cyclictest	3850373	-21	kworker/u16:1+events_unbound	08:29:12	6
3750853	99	39	37,2	cyclictest	3702808	-21	kworker/u16:0+events_unbound	07:59:40	6
3750853	99	39	37,2	cyclictest	204446	-21	kworker/u16:2+events_unbound	12:02:06	6
3750853	99	38	36,2	cyclictest	4155106	-21	kworker/u16:3+events_unbound	11:28:31	6
3750853	99	38	36,2	cyclictest	4155106	-21	kworker/u16:3+events_unbound	10:43:16	6
3750853	99	37	35,2	cyclictest	4045557	-21	kworker/u16:2+events_unbound	09:38:31	6
3750853	99	37	35,2	cyclictest	178045	-21	kworker/u16:1+events_unbound	12:32:27	6
3750853	99	36	34,2	cyclictest	4192224	-21	kworker/u16:4+events_unbound	11:42:51	6
3750853	99	36	34,2	cyclictest	4128380	-21	kworker/u16:0+events_unbound	11:17:54	6
3750853	99	36	34,2	cyclictest	4128380	-21	kworker/u16:0+events_unbound	10:35:35	6
3750853	99	36	34,2	cyclictest	4045557	-21	kworker/u16:2+events_unbound	09:58:35	6
3750853	99	36	34,2	cyclictest	4045557	-21	kworker/u16:2+events_unbound	09:45:16	6
3750853	99	36	34,2	cyclictest	4045557	-21	kworker/u16:2+events_unbound	09:45:16	6
3750853	99	36	34,2	cyclictest	3984402	-21	kworker/u16:0+events_unbound	09:12:28	6
3750853	99	36	34,2	cyclictest	3859919	-21	kworker/u16:4+events_unbound	09:50:58	6
3750853	99	35	33,2	cyclictest	4192224	-21	kworker/u16:4+events_unbound	11:31:27	6
3750853	99	35	33,2	cyclictest	4018820	-21	kworker/u16:1+events_unbound	10:20:50	6
3750853	99	35	33,2	cyclictest	3859919	-21	kworker/u16:4+events_unbound	09:21:52	6
3750853	99	35	33,2	cyclictest	120569	-21	kworker/u16:5+events_unbound	11:51:03	6
3750845	99	35	33,2	cyclictest	3974325	-21	kworker/u16:3+events_unbound	09:34:03	4
3750853	99	34	32,2	cyclictest	4155106	-21	kworker/u16:3+events_unbound	11:00:55	6
3750853	99	34	32,2	cyclictest	4128380	-21	kworker/u16:0+events_unbound	10:58:03	6
3750853	99	34	32,2	cyclictest	4128380	-21	kworker/u16:0+events_unbound	10:53:28	6
3750853	99	34	32,2	cyclictest	4128380	-21	kworker/u16:0+events_unbound	10:16:42	6
3750853	99	34	32,2	cyclictest	4018820	-21	kworker/u16:1+flush-8:0	09:24:59	6
3750853	99	34	32,2	cyclictest	3859919	-21	kworker/u16:4+events_unbound	10:02:22	6
3750853	99	34	32,2	cyclictest	3859919	-21	kworker/u16:4+events_unbound	09:40:36	6
3750853	99	34	32,2	cyclictest	217775	-21	kworker/u16:0+events_unbound	12:26:22	6
3750853	99	34	32,2	cyclictest	217775	-21	kworker/u16:0+events_unbound	12:26:22	6
3750853	99	34	32,2	cyclictest	204446	-21	kworker/u16:2+events_unbound	12:05:23	6
3750853	99	34	31,2	cyclictest	3811964	-21	kworker/u16:2+flush-8:0	07:39:25	6
3750845	99	34	29,4	cyclictest	3974231	-21	pool-gnome-soft	09:00:12	4
3750854	99	33	30,2	cyclictest	4080458	-21	ssh	09:46:22	7
3750854	99	33	30,2	cyclictest	4080458	-21	ssh	09:46:22	7
3750853	99	33	31,2	cyclictest	4167822	-21	kworker/u16:2+events_unbound	10:30:32	6
3750853	99	33	31,2	cyclictest	4155106	-21	kworker/u16:3+flush-8:0	11:19:50	6
3750853	99	33	31,2	cyclictest	3850373	-21	kworker/u16:1+flush-8:0	08:39:31	6
3750853	99	33	31,2	cyclictest	204446	-21	kworker/u16:2+events_unbound	12:38:58	6
3750853	99	33	31,2	cyclictest	120569	-21	kworker/u16:5+events_unbound	11:38:31	6
3750849	99	33	31,2	cyclictest	4167822	-21	kworker/u16:2+events_unbound	10:31:56	5
3750849	99	33	31,2	cyclictest	3859919	-21	kworker/u16:4+events_unbound	09:57:01	5
3750853	99	32	30,2	cyclictest	4155106	-21	kworker/u16:3+events_unbound	10:44:42	6
3750853	99	32	30,2	cyclictest	4128380	-21	kworker/u16:0+events_unbound	11:54:50	6
3750853	99	32	30,2	cyclictest	4045557	-21	kworker/u16:2+events_unbound	10:11:46	6
3750853	99	32	30,2	cyclictest	3850373	-21	kworker/u16:1+events_unbound	08:24:47	6
3750853	99	32	30,2	cyclictest	204446	-21	kworker/u16:2+events_unbound	12:13:51	6
3750849	99	32	30,2	cyclictest	4155106	-21	kworker/u16:3+flush-8:0	10:50:00	5
3750849	99	32	30,2	cyclictest	4018820	-21	kworker/u16:1+events_unbound	10:23:34	5
3750849	99	32	30,2	cyclictest	3850373	-21	kworker/u16:1+flush-8:0	08:09:33	5
3750849	99	32	29,2	cyclictest	3850373	-21	kworker/u16:1+flush-8:0	08:29:25	5
3750849	99	32	29,2	cyclictest	3811964	-21	kworker/u16:2+flush-8:0	07:39:15	5
3750849	99	32	29,2	cyclictest	204446	-21	kworker/u16:2+events_unbound	12:24:18	5
3750849	99	32	29,2	cyclictest	204446	-21	kworker/u16:2+events_unbound	12:24:18	5
3750845	99	32	30,2	cyclictest	3850373	-21	kworker/u16:1+events_unbound	08:29:36	4
3750854	99	31	30,0	cyclictest	0	-21	swapper/7	10:53:01	7
3750854	99	31	30,0	cyclictest	0	-21	swapper/7	09:26:30	7
3750853	99	31	29,2	cyclictest	4018820	-21	kworker/u16:1+events_unbound	09:32:30	6
3750853	99	31	29,2	cyclictest	3850373	-21	kworker/u16:1+events_unbound	08:49:44	6
3750853	99	31	29,2	cyclictest	3783389	-21	kworker/u16:1+flush-8:0	07:34:30	6
3750853	99	31	29,2	cyclictest	3783389	-21	kworker/u16:1+events_unbound	07:24:39	6
3750853	99	31	29,2	cyclictest	204446	-21	kworker/u16:2+events_unbound	12:19:37	6
3750849	99	31	29,2	cyclictest	4018820	-21	kworker/u16:1+events_unbound	09:44:35	5
3750849	99	31	29,2	cyclictest	4018820	-21	kworker/u16:1+events_unbound	09:44:35	5
3750854	99	30	29,0	cyclictest	0	-21	swapper/7	07:36:48	7
3750853	99	30	28,2	cyclictest	4018820	-21	kworker/u16:1+events_unbound	10:05:43	6
3750853	99	30	28,2	cyclictest	3831040	-21	kworker/u16:3+events_unbound	08:35:47	6
3750853	99	30	28,2	cyclictest	3477174	-21	kworker/u16:5+events_unbound	07:33:19	6
3750849	99	30	28,2	cyclictest	4192224	-21	kworker/u16:4+flush-8:0	10:39:25	5
3750849	99	30	28,2	cyclictest	4192224	-21	kworker/u16:4+events_unbound	11:07:01	5
3750849	99	30	28,2	cyclictest	4128380	-21	kworker/u16:0+events_unbound	10:55:37	5
3750849	99	30	28,2	cyclictest	4045557	-21	kworker/u16:2+events_unbound	09:41:29	5
3750849	99	30	28,2	cyclictest	3926800	-21	kworker/u16:0+events_unbound	08:52:47	5
3750849	99	30	28,2	cyclictest	3859919	-21	kworker/u16:4+events_unbound	08:19:40	5
3750849	99	30	28,2	cyclictest	3859919	-21	kworker/u16:4+events_unbound	08:19:40	5
3750849	99	30	28,2	cyclictest	3831040	-21	kworker/u16:3+events_unbound	07:59:07	5
3750849	99	30	28,2	cyclictest	3702808	-21	kworker/u16:0+events_unbound	08:01:16	5
3750849	99	30	28,2	cyclictest	120569	-21	kworker/u16:5+events_unbound	11:53:02	5
3750849	99	30	28,2	cyclictest	120569	-21	kworker/u16:5+events_unbound	11:32:41	5
3750849	99	30	27,2	cyclictest	3783389	-21	kworker/u16:1+events_unbound	07:24:10	5
3750448	2	30	20,7	sleep6	0	-21	swapper/6	07:07:30	6
3750854	99	29	28,0	cyclictest	0	-21	swapper/7	12:25:54	7
3750854	99	29	28,0	cyclictest	0	-21	swapper/7	12:25:54	7
3750854	99	29	28,0	cyclictest	0	-21	swapper/7	12:21:13	7
3750854	99	29	28,0	cyclictest	0	-21	swapper/7	11:52:13	7
3750854	99	29	28,0	cyclictest	0	-21	swapper/7	10:31:17	7
3750854	99	29	27,1	cyclictest	0	-21	swapper/7	10:23:44	7
3750853	99	29	27,2	cyclictest	4128380	-21	kworker/u16:0+events_unbound	10:25:23	6
3750853	99	29	27,2	cyclictest	3859919	-21	kworker/u16:4+flush-8:0	08:19:37	6
3750853	99	29	27,2	cyclictest	3859919	-21	kworker/u16:4+flush-8:0	08:19:37	6
3750853	99	29	27,2	cyclictest	3831040	-21	kworker/u16:3+events_unbound	07:50:52	6
3750849	99	29	27,2	cyclictest	4192224	-21	kworker/u16:4+events_unbound	11:20:26	5
3750849	99	29	27,2	cyclictest	4167822	-21	kworker/u16:2+events_unbound	10:28:17	5
3750849	99	29	27,2	cyclictest	3859919	-21	kworker/u16:4+events_unbound	09:32:41	5
3750849	99	29	27,2	cyclictest	3831040	-21	kworker/u16:3+events_unbound	08:17:27	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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