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 Jan 26, 2026 00:43:33)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3655655	2	95	0,1	sleep7	3655656	-21	cat	20:32:13	7
17453	2	66	0,1	sleep7	17455	-21	kthreadcore	00:27:19	7
3486938	99	57	55,2	cyclictest	3925519	-21	kworker/u16:5+events_unbound	00:22:16	5
3486938	99	57	55,2	cyclictest	3867811	-21	kworker/u16:0+events_unbound	23:52:31	5
3486938	99	56	54,2	cyclictest	3925519	-21	kworker/u16:5+events_unbound	00:27:15	5
3486422	2	54	43,7	sleep5	0	-21	swapper/5	19:03:42	5
3486939	99	53	50,2	cyclictest	4085450	-21	kworker/u16:1+events_unbound	23:52:14	6
3486939	99	53	50,2	cyclictest	3925519	-21	kworker/u16:5+flush-8:0	23:17:15	6
3486585	2	53	19,30	sleep7	0	-21	swapper/7	19:06:01	7
3486939	99	51	49,2	cyclictest	3698864	-21	kworker/u16:1+flush-8:0	22:47:14	6
3486939	99	51	48,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	22:42:14	6
3486939	99	51	48,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	21:27:15	6
3486939	99	50	48,2	cyclictest	3925519	-21	kworker/u16:5+flush-8:0	00:17:29	6
3486938	99	50	48,2	cyclictest	4110225	-21	kworker/u16:3+flush-8:0	23:57:15	5
3486938	99	49	47,2	cyclictest	3519787	-21	kworker/u16:3+events_unbound	21:02:18	5
3486372	2	49	39,7	sleep4	0	-21	swapper/4	19:03:01	4
3486939	99	48	46,2	cyclictest	3988982	-21	kworker/u16:2+events_unbound	23:27:29	6
3486939	99	48	46,2	cyclictest	3867811	-21	kworker/u16:0+events_unbound	23:22:30	6
3486939	99	48	45,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	22:37:13	6
3486394	2	48	37,7	sleep6	0	-21	swapper/6	19:03:19	6
3486944	99	47	41,5	cyclictest	3496440	-21	latency_hist	19:12:00	7
3486939	99	47	45,2	cyclictest	4180672	-21	kworker/u16:0+events_unbound	00:27:26	6
3486939	99	47	45,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	21:17:15	6
3486938	99	47	45,2	cyclictest	3698864	-21	kworker/u16:1+flush-8:0	22:22:15	5
3486938	99	46	44,2	cyclictest	3925519	-21	kworker/u16:5+flush-8:0	00:12:28	5
3486938	99	46	44,2	cyclictest	3925519	-21	kworker/u16:5+events_unbound	23:32:32	5
3486944	99	45	0,44	cyclictest	3746678	-21	latency_hist	21:16:59	7
3486938	99	45	43,2	cyclictest	3925519	-21	kworker/u16:5+events_unbound	00:32:16	5
3486938	99	45	43,2	cyclictest	3616009	-21	kworker/u16:2+flush-8:0	20:47:27	5
3486938	99	45	43,2	cyclictest	3519787	-21	kworker/u16:3+events_unbound	20:42:30	5
3486938	99	45	43,2	cyclictest	3519787	-21	kworker/u16:3+events_unbound	20:42:30	5
3486939	99	44	42,2	cyclictest	3988982	-21	kworker/u16:2+flush-8:0	23:12:30	6
3486939	99	44	42,2	cyclictest	3867811	-21	kworker/u16:0+events_unbound	22:57:33	6
3486939	99	44	42,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	22:32:14	6
3486939	99	44	42,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	22:22:18	6
3486938	99	44	42,2	cyclictest	3867811	-21	kworker/u16:0+flush-8:0	23:02:15	5
3486938	99	44	42,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	22:27:25	5
3486938	99	44	42,2	cyclictest	3519787	-21	kworker/u16:3+events_unbound	19:47:27	5
3486939	99	43	42,1	cyclictest	3988982	-21	kworker/u16:2+events_unbound	23:32:14	6
3486939	99	43	41,2	cyclictest	3867811	-21	kworker/u16:0+events_unbound	23:47:25	6
3486939	99	43	40,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	22:12:14	6
3486939	99	43	40,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	22:02:14	6
3486939	99	43	40,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	22:02:14	6
3486938	99	43	41,2	cyclictest	3925519	-21	kworker/u16:5+flush-8:0	00:07:28	5
3486938	99	43	41,2	cyclictest	3925519	-21	kworker/u16:5+flush-8:0	00:07:28	5
3486938	99	43	41,2	cyclictest	3925519	-21	kworker/u16:5+events_unbound	22:37:27	5
3486938	99	43	40,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	21:32:01	5
3486939	99	42	40,2	cyclictest	3842511	-21	kworker/u16:3+flush-8:0	21:57:34	6
3486939	99	42	40,2	cyclictest	3519787	-21	kworker/u16:3+flush-8:0	19:52:15	6
3486938	99	42	40,2	cyclictest	3988982	-21	kworker/u16:2+flush-8:0	23:22:15	5
3486938	99	42	40,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	21:26:50	5
3486938	99	42	40,2	cyclictest	3496433	-21	kworker/u16:1+events_unbound	19:17:35	5
3486939	99	41	39,2	cyclictest	3842511	-21	kworker/u16:3+flush-8:0	22:11:59	6
3486938	99	41	39,2	cyclictest	4110225	-21	kworker/u16:3+events_unbound	00:02:28	5
3486938	99	41	39,2	cyclictest	3988982	-21	kworker/u16:2+events_unbound	23:07:27	5
3486938	99	41	39,2	cyclictest	3744416	-21	kworker/u16:4+events_unbound	21:40:50	5
3486938	99	41	39,2	cyclictest	3558343	-21	kworker/u16:0+events_unbound	20:17:31	5
3486939	99	40	38,2	cyclictest	3804981	-21	kworker/u16:0+events_unbound	21:40:19	6
3486938	99	40	38,2	cyclictest	4180672	-21	kworker/u16:0+events_unbound	00:20:05	5
3486938	99	40	38,2	cyclictest	4085450	-21	kworker/u16:1+flush-8:0	23:47:31	5
3486938	99	40	38,2	cyclictest	3842421	-21	kworker/u16:2+events_unbound	22:02:28	5
3486938	99	40	38,2	cyclictest	3842421	-21	kworker/u16:2+events_unbound	22:02:28	5
3486938	99	40	37,2	cyclictest	3744416	-21	kworker/u16:4+events_unbound	21:57:02	5
3486938	99	40	37,2	cyclictest	3577888	-21	kworker/u16:1+events_unbound	20:07:14	5
3486939	99	39	37,2	cyclictest	4110225	-21	kworker/u16:3+events_unbound	00:07:21	6
3486939	99	39	37,2	cyclictest	4110225	-21	kworker/u16:3+events_unbound	00:07:21	6
3486939	99	39	37,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	21:22:26	6
3486938	99	39	37,2	cyclictest	3988982	-21	kworker/u16:2+events_unbound	23:27:54	5
3486938	99	39	37,2	cyclictest	3925519	-21	kworker/u16:5+events_unbound	23:17:27	5
3486938	99	39	37,2	cyclictest	3925519	-21	kworker/u16:5+events_unbound	23:12:28	5
3486938	99	39	37,2	cyclictest	3867811	-21	kworker/u16:0+flush-8:0	22:32:28	5
3486938	99	39	37,2	cyclictest	3867811	-21	kworker/u16:0+events_unbound	22:57:29	5
3486938	99	39	37,2	cyclictest	3698864	-21	kworker/u16:1+flush-8:0	22:12:15	5
3486938	99	39	37,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	21:21:51	5
3486938	99	39	37,2	cyclictest	3577888	-21	kworker/u16:1+events_unbound	20:02:34	5
3486938	99	39	37,2	cyclictest	3558343	-21	kworker/u16:0+events_unbound	21:10:50	5
3486938	99	38	36,2	cyclictest	3867811	-21	kworker/u16:0+events_unbound	22:18:18	5
3486938	99	38	36,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	22:45:02	5
3486944	99	37	33,3	cyclictest	4104563	-21	kthreadcore	23:42:22	7
3486944	99	37	31,5	cyclictest	3867774	-21	latency_hist	22:06:59	7
3486944	99	37	31,5	cyclictest	3867774	-21	latency_hist	22:06:59	7
3486939	99	37	35,2	cyclictest	3616009	-21	kworker/u16:2+flush-8:0	20:52:29	6
3486939	99	37	35,2	cyclictest	3558343	-21	kworker/u16:0+events_unbound	21:08:51	6
3486939	99	37	34,2	cyclictest	4110225	-21	kworker/u16:3+flush-8:0	00:02:10	6
3486939	99	37	34,2	cyclictest	3916643	-21	kworker/u16:2+flush-8:0	22:27:10	6
3486938	99	37	35,2	cyclictest	3925519	-21	kworker/u16:5+events_unbound	23:46:05	5
3486938	99	37	35,2	cyclictest	3842511	-21	kworker/u16:3+events_unbound	22:11:35	5
3486938	99	37	35,2	cyclictest	3804981	-21	kworker/u16:0+events_unbound	21:49:34	5
3486938	99	37	35,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	22:51:15	5
3486938	99	37	35,2	cyclictest	3698864	-21	kworker/u16:1+events_unbound	21:27:17	5
3486934	99	37	34,2	cyclictest	3867811	-21	kworker/u16:0+flush-8:0	22:52:30	4
3486944	99	36	30,5	cyclictest	3819320	-21	latency_hist	21:47:00	7
3486939	99	36	34,2	cyclictest	3988982	-21	kworker/u16:2+events_unbound	23:07:50	6
3486939	99	36	34,2	cyclictest	3558343	-21	kworker/u16:0+flush-8:0	21:02:26	6
3486939	99	36	34,2	cyclictest	3519787	-21	kworker/u16:3+flush-8:0	20:42:15	6
3486939	99	36	34,2	cyclictest	3519787	-21	kworker/u16:3+flush-8:0	20:42:15	6
3486939	99	36	33,2	cyclictest	3716311	-21	kworker/u16:2+flush-8:0	21:12:15	6
3486938	99	36	34,2	cyclictest	4085450	-21	kworker/u16:1+events_unbound	23:38:53	5
3486938	99	36	34,2	cyclictest	3744416	-21	kworker/u16:4+events_unbound	21:43:07	5
3486939	99	35	34,1	cyclictest	3925519	-21	kworker/u16:5+events_unbound	23:45:02	6
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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