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 Jun 23, 2026 00:43:31)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3510429	2	57	22,30	sleep7	0	-21	swapper/7	19:07:55	7
3510429	2	57	22,30	sleep7	0	-21	swapper/7	19:07:55	7
3510522	2	45	35,7	sleep5	0	-21	swapper/5	19:09:13	5
3510522	2	45	35,7	sleep5	0	-21	swapper/5	19:09:13	5
3510826	99	39	37,2	cyclictest	4114970	-21	kworker/u16:0+flush-8:0	23:40:07	4
3510826	99	39	37,2	cyclictest	4054059	-21	kworker/u16:1+events_unbound	23:35:06	4
3510826	99	38	37,1	cyclictest	3896606	-21	kworker/u16:5+events_unbound	23:21:56	4
3510826	99	38	36,2	cyclictest	3720125	-21	kworker/u16:1+events_unbound	21:37:01	4
3510826	99	38	35,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	22:59:39	4
3510379	2	38	28,7	sleep4	0	-21	swapper/4	19:07:11	4
3510379	2	38	28,7	sleep4	0	-21	swapper/4	19:07:11	4
3510323	2	38	28,7	sleep6	0	-21	swapper/6	19:06:25	6
3510323	2	38	28,7	sleep6	0	-21	swapper/6	19:06:25	6
3510826	99	37	35,2	cyclictest	4188033	-21	kworker/u16:1+events_unbound	00:20:16	4
3510826	99	37	35,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	22:19:00	4
3510826	99	37	35,2	cyclictest	3748483	-21	kworker/u16:0+flush-8:0	21:25:16	4
3510831	99	36	34,2	cyclictest	3720125	-21	kworker/u16:1+events_unbound	21:15:08	6
3510826	99	36	34,2	cyclictest	4188033	-21	kworker/u16:1+events_unbound	00:19:31	4
3510826	99	36	34,2	cyclictest	3978018	-21	kworker/u16:1+events_unbound	22:50:52	4
3510826	99	36	34,2	cyclictest	3720125	-21	kworker/u16:1+events_unbound	21:47:27	4
3510831	99	35	32,2	cyclictest	4054059	-21	kworker/u16:1+events_unbound	23:34:56	6
3510830	99	35	33,2	cyclictest	3868240	-21	kworker/u16:2+flush-8:0	22:39:32	5
3510830	99	35	32,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	23:04:52	5
3510826	99	35	33,2	cyclictest	4114970	-21	kworker/u16:0+events_unbound	23:45:56	4
3510826	99	35	33,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	23:29:00	4
3510831	99	34	31,2	cyclictest	4054059	-21	kworker/u16:1+flush-8:0	23:19:52	6
3510830	99	34	31,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	23:24:52	5
3510826	99	34	32,2	cyclictest	43444	-21	kworker/u16:2+events_unbound	00:37:07	4
3510826	99	34	32,2	cyclictest	4114970	-21	kworker/u16:0+events_unbound	00:25:43	4
3510826	99	34	32,2	cyclictest	4027250	-21	kworker/u16:2+events_unbound	23:52:00	4
3510826	99	34	32,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	22:45:55	4
3510826	99	34	32,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	22:13:40	4
3510826	99	33	31,2	cyclictest	4188033	-21	kworker/u16:1+events_unbound	00:12:00	4
3510826	99	33	31,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	23:16:32	4
3510826	99	33	31,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	23:11:52	4
3510826	99	33	31,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	22:42:12	4
3510826	99	33	31,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	22:23:32	4
3510826	99	33	31,2	cyclictest	3846178	-21	kworker/u16:4+events_unbound	22:03:44	4
3510826	99	33	31,2	cyclictest	3748483	-21	kworker/u16:0+events_unbound	22:07:56	4
3510826	99	33	31,2	cyclictest	3748483	-21	kworker/u16:0+events_unbound	21:52:41	4
3510831	99	32	30,2	cyclictest	4114970	-21	kworker/u16:0+events_unbound	23:40:16	6
3510826	99	32	30,2	cyclictest	4114970	-21	kworker/u16:0+events_unbound	00:06:43	4
3510826	99	32	30,2	cyclictest	4114970	-21	kworker/u16:0+events_unbound	00:00:32	4
3510826	99	32	30,2	cyclictest	4027250	-21	kworker/u16:2+events_unbound	23:56:00	4
3510826	99	32	30,2	cyclictest	3992670	-21	kworker/u16:0+events_unbound	22:57:40	4
3510826	99	32	30,2	cyclictest	3942453	-21	kworker/u16:0+events_unbound	22:32:51	4
3510826	99	32	30,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	23:30:16	4
3510826	99	32	30,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	23:30:16	4
3510826	99	32	30,2	cyclictest	3868240	-21	kworker/u16:2+events_unbound	22:36:51	4
3510826	99	32	30,2	cyclictest	3868240	-21	kworker/u16:2+events_unbound	21:57:52	4
3510830	99	31	29,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	22:10:07	5
3510826	99	31	29,2	cyclictest	4188033	-21	kworker/u16:1+events_unbound	00:32:27	4
3510826	99	31	29,2	cyclictest	3770119	-21	kworker/u16:3+events_unbound	21:33:40	4
3510826	99	31	29,2	cyclictest	3770119	-21	kworker/u16:3+events_unbound	21:33:40	4
3510826	99	31	29,2	cyclictest	3770119	-21	kworker/u16:3+events_unbound	21:17:19	4
3510826	99	31	29,2	cyclictest	3720125	-21	kworker/u16:1+events_unbound	21:40:40	4
3510826	99	30	28,2	cyclictest	3868240	-21	kworker/u16:2+events_unbound	22:26:40	4
3510836	99	29	24,4	cyclictest	55572	-21	updatedb	00:34:38	7
3510830	99	29	27,2	cyclictest	3720125	-21	kworker/u16:1+events_unbound	21:05:08	5
3510830	99	29	26,2	cyclictest	3499943	-21	kworker/u16:2+flush-8:0	20:05:03	5
3510831	99	28	26,2	cyclictest	4027250	-21	kworker/u16:2+events_unbound	00:03:32	6
3510831	99	28	26,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	22:24:56	6
3510830	99	28	25,2	cyclictest	3573525	-21	kworker/u16:1+events_unbound	19:44:51	5
3510826	99	28	25,2	cyclictest	3481542	-21	kworker/u16:0+events_unbound	19:29:40	4
3510826	99	28	25,2	cyclictest	3481542	-21	kworker/u16:0+events_unbound	19:29:40	4
3510831	99	27	24,2	cyclictest	3846178	-21	kworker/u16:4+events_unbound	21:54:48	6
3510826	99	27	25,2	cyclictest	3720125	-21	kworker/u16:1+events_unbound	21:12:55	4
3510826	99	27	24,2	cyclictest	3660407	-21	kworker/u16:3+flush-8:0	20:39:48	4
3510831	99	26	24,2	cyclictest	4027250	-21	kworker/u16:2+flush-8:0	23:54:48	6
3510831	99	26	24,2	cyclictest	3748483	-21	kworker/u16:0+events_unbound	21:11:55	6
3510830	99	26	24,2	cyclictest	4027250	-21	kworker/u16:2+flush-8:0	23:39:32	5
3510826	99	26	24,2	cyclictest	3770119	-21	kworker/u16:3+events_unbound	21:20:52	4
3510826	99	26	24,2	cyclictest	3660407	-21	kworker/u16:3+events_unbound	20:46:48	4
3510826	99	26	24,2	cyclictest	3573525	-21	kworker/u16:1+events_unbound	20:13:48	4
3510826	99	26	23,2	cyclictest	3520484	-21	kworker/u16:4+events_unbound	19:44:47	4
3510831	99	25	23,2	cyclictest	4114970	-21	kworker/u16:0+flush-8:0	00:10:40	6
3510831	99	25	23,2	cyclictest	3720125	-21	kworker/u16:1+flush-8:0	21:44:32	6
3510830	99	25	23,2	cyclictest	3942453	-21	kworker/u16:0+events_unbound	22:39:51	5
3510830	99	25	22,3	cyclictest	3748483	-21	kworker/u16:0+flush-8:0	21:50:07	5
3510836	99	24	20,3	cyclictest	55572	-21	updatedb	00:34:34	7
3510831	99	24	22,2	cyclictest	3772918	-21	kworker/u16:4+flush-8:0	21:25:03	6
3510830	99	24	22,2	cyclictest	4027250	-21	kworker/u16:2+flush-8:0	23:50:03	5
3510830	99	24	21,2	cyclictest	3896606	-21	kworker/u16:5+flush-8:0	23:39:54	5
3510826	99	24	22,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	23:08:43	4
3510826	99	24	22,2	cyclictest	3520484	-21	kworker/u16:4+events_unbound	19:40:41	4
3510826	99	24	22,2	cyclictest	3481542	-21	kworker/u16:0+events_unbound	19:23:48	4
3510826	99	24	21,2	cyclictest	3681745	-21	kworker/u16:0+flush-8:0	20:54:47	4
3510831	99	23	21,2	cyclictest	4139054	-21	kworker/u16:3+events_unbound	23:52:47	6
3510831	99	23	21,2	cyclictest	3896606	-21	kworker/u16:5+events_unbound	23:07:32	6
3510831	99	23	21,2	cyclictest	3868240	-21	kworker/u16:2+events_unbound	22:09:32	6
3510831	99	23	21,2	cyclictest	3748483	-21	kworker/u16:0+events_unbound	22:12:12	6
3510831	99	23	21,2	cyclictest	3681745	-21	kworker/u16:0+events_unbound	20:49:32	6
3510830	99	23	21,2	cyclictest	4114970	-21	kworker/u16:0+events_unbound	00:19:59	5
3510830	99	23	20,2	cyclictest	1766539	-21	kworker/u16:3+flush-8:0	19:14:53	5
3510826	99	23	21,2	cyclictest	3520484	-21	kworker/u16:4+events_unbound	19:55:08	4
3510830	99	22	20,2	cyclictest	3978018	-21	kworker/u16:1+events_unbound	22:49:51	5
3510830	99	22	20,2	cyclictest	3748483	-21	kworker/u16:0+events_unbound	21:40:03	5
3510830	99	22	20,2	cyclictest	3720125	-21	kworker/u16:1+events_unbound	21:20:01	5
3510831	99	21	19,2	cyclictest	43444	-21	kworker/u16:2+events_unbound	00:36:47	6
3510831	99	21	19,2	cyclictest	3573525	-21	kworker/u16:1+flush-8:0	20:15:01	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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