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 Aug 04, 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
3871962	99	48	43,4	cyclictest	192838	-21	latency_hist	23:03:37	7
3871954	99	47	45,2	cyclictest	4193296	-21	kworker/u16:2+events_unbound	22:01:24	5
3866473	2	45	2,31	sleep7	0	-21	swapper/7	19:04:01	7
3871590	2	44	19,7	sleep4	0	-21	swapper/4	19:07:43	4
3871949	99	43	41,2	cyclictest	4050749	-21	kworker/u16:2+flush-8:0	21:18:40	4
3871962	99	42	40,1	cyclictest	4108717	-21	diskmemload	22:54:04	7
3871958	99	42	40,2	cyclictest	4050749	-21	kworker/u16:2+events_unbound	21:24:12	6
3871958	99	42	39,2	cyclictest	3842432	-21	kworker/u16:1+events_unbound	20:48:40	6
3871949	99	42	40,2	cyclictest	313468	-21	kworker/u16:2+events_unbound	23:58:39	4
3871949	99	41	38,2	cyclictest	4108758	-21	kworker/u16:3+events_unbound	21:33:40	4
3871466	2	41	30,8	sleep5	0	-21	swapper/5	19:06:00	5
3871949	99	40	37,2	cyclictest	4108758	-21	kworker/u16:3+events_unbound	22:33:40	4
3871962	99	39	36,2	cyclictest	120296	-21	ssh	22:33:23	7
3871954	99	39	37,2	cyclictest	4108758	-21	kworker/u16:3+flush-8:0	22:43:40	5
3871601	2	39	29,7	sleep6	0	-21	swapper/6	19:07:54	6
3871958	99	37	35,2	cyclictest	4108758	-21	kworker/u16:3+flush-8:0	22:18:40	6
3871954	99	37	34,2	cyclictest	3904434	-21	kworker/u16:3+flush-8:0	19:38:40	5
3871949	99	37	35,2	cyclictest	265616	-21	kworker/u16:5+flush-8:0	23:38:55	4
3871954	99	36	34,2	cyclictest	409924	-21	kworker/u16:1+events_unbound	00:36:20	5
3871949	99	36	34,2	cyclictest	3842432	-21	kworker/u16:1+events_unbound	21:26:40	4
3871962	99	35	34,0	cyclictest	0	-21	swapper/7	21:47:08	7
3871958	99	35	33,2	cyclictest	4108758	-21	kworker/u16:3+events_unbound	22:28:00	6
3871954	99	35	33,2	cyclictest	325866	-21	kworker/u16:4+events_unbound	00:25:47	5
3871949	99	35	32,2	cyclictest	265616	-21	kworker/u16:5+events_unbound	23:57:07	4
3871958	99	34	32,2	cyclictest	4193296	-21	kworker/u16:2+events_unbound	23:06:24	6
3871958	99	34	32,2	cyclictest	4108758	-21	kworker/u16:3+flush-8:0	21:50:56	6
3871958	99	34	32,2	cyclictest	4108758	-21	kworker/u16:3+flush-8:0	21:50:56	6
3871958	99	34	32,2	cyclictest	166859	-21	kworker/u16:3+events_unbound	23:21:55	6
3871954	99	34	32,2	cyclictest	4108758	-21	kworker/u16:3+flush-8:0	21:43:35	5
3871962	99	33	32,0	cyclictest	0	-21	swapper/7	22:11:19	7
3871962	99	33	31,1	cyclictest	4108717	-21	diskmemload	00:04:52	7
3871958	99	33	31,2	cyclictest	4193296	-21	kworker/u16:2+events_unbound	23:32:00	6
3871958	99	33	31,2	cyclictest	4178909	-21	kworker/u16:0+flush-8:0	22:37:31	6
3871958	99	33	31,2	cyclictest	4050749	-21	kworker/u16:2+flush-8:0	21:33:21	6
3871958	99	33	31,2	cyclictest	313468	-21	kworker/u16:2+flush-8:0	23:59:16	6
3871954	99	33	31,2	cyclictest	4193296	-21	kworker/u16:2+flush-8:0	22:53:38	5
3871954	99	33	31,2	cyclictest	4178909	-21	kworker/u16:0+events_unbound	22:26:24	5
3871954	99	33	31,2	cyclictest	4178909	-21	kworker/u16:0+events_unbound	21:56:48	5
3871949	99	33	31,2	cyclictest	4193296	-21	kworker/u16:2+flush-8:0	22:53:59	4
3871949	99	33	31,2	cyclictest	4178909	-21	kworker/u16:0+events_unbound	22:07:13	4
3871949	99	33	31,2	cyclictest	4050749	-21	kworker/u16:2+events_unbound	21:12:40	4
3871949	99	33	31,2	cyclictest	3842432	-21	kworker/u16:1+flush-8:0	21:32:40	4
3871949	99	33	31,2	cyclictest	362120	-21	kworker/u16:0+events_unbound	00:27:19	4
3871949	99	33	31,2	cyclictest	166859	-21	kworker/u16:3+events_unbound	23:44:27	4
3871949	99	33	31,2	cyclictest	166859	-21	kworker/u16:3+events_unbound	23:14:56	4
3871962	99	32	31,0	cyclictest	0	-21	swapper/7	21:23:09	7
3871962	99	32	31,0	cyclictest	0	-21	swapper/7	00:27:23	7
3871958	99	32	30,2	cyclictest	4178909	-21	kworker/u16:0+events_unbound	22:30:56	6
3871958	99	32	30,2	cyclictest	4108758	-21	kworker/u16:3+events_unbound	22:12:44	6
3871958	99	32	30,2	cyclictest	265616	-21	kworker/u16:5+events_unbound	00:20:48	6
3871958	99	32	30,2	cyclictest	154321	-21	kworker/u16:1+events_unbound	22:46:15	6
3871958	99	32	29,2	cyclictest	166859	-21	kworker/u16:3+flush-8:0	23:34:39	6
3871954	99	32	30,2	cyclictest	4178909	-21	kworker/u16:0+events_unbound	22:06:11	5
3871954	99	32	30,2	cyclictest	3842432	-21	kworker/u16:1+flush-8:0	21:10:29	5
3871954	99	32	30,2	cyclictest	313468	-21	kworker/u16:2+flush-8:0	23:59:36	5
3871949	99	32	30,2	cyclictest	4193296	-21	kworker/u16:2+events_unbound	22:51:04	4
3871949	99	32	30,2	cyclictest	4193296	-21	kworker/u16:2+events_unbound	22:00:44	4
3871949	99	32	30,2	cyclictest	4178909	-21	kworker/u16:0+flush-8:0	22:46:03	4
3871949	99	32	30,2	cyclictest	4178909	-21	kworker/u16:0+events_unbound	22:26:40	4
3871949	99	32	30,2	cyclictest	4108758	-21	kworker/u16:3+flush-8:0	21:43:25	4
3871949	99	32	30,2	cyclictest	4108758	-21	kworker/u16:3+events_unbound	22:21:00	4
3871949	99	32	30,2	cyclictest	4108758	-21	kworker/u16:3+events_unbound	22:15:45	4
3871949	99	32	30,2	cyclictest	4108758	-21	kworker/u16:3+events_unbound	22:13:36	4
3871949	99	32	30,2	cyclictest	409924	-21	kworker/u16:1+events_unbound	00:37:52	4
3871949	99	32	30,2	cyclictest	3842432	-21	kworker/u16:1+events_unbound	21:15:40	4
3871949	99	32	30,2	cyclictest	325866	-21	kworker/u16:4+flush-8:0	00:05:24	4
3871949	99	32	30,2	cyclictest	166859	-21	kworker/u16:3+events_unbound	23:27:05	4
3871962	99	31	30,0	cyclictest	0	-21	swapper/7	00:20:24	7
3871962	99	31	30,0	cyclictest	0	-21	swapper/7	00:13:28	7
3871962	99	31	27,3	cyclictest	300504	-21	ssh	23:47:11	7
3871958	99	31	29,2	cyclictest	3842432	-21	kworker/u16:1+flush-8:0	21:14:40	6
3871958	99	31	29,2	cyclictest	3842432	-21	kworker/u16:1+flush-8:0	20:26:48	6
3871958	99	31	29,2	cyclictest	3842432	-21	kworker/u16:1+events_unbound	21:10:00	6
3871958	99	31	29,2	cyclictest	313468	-21	kworker/u16:2+flush-8:0	00:06:57	6
3871954	99	31	29,2	cyclictest	4178909	-21	kworker/u16:0+events_unbound	21:46:48	5
3871954	99	31	29,2	cyclictest	4108758	-21	kworker/u16:3+flush-8:0	22:34:47	5
3871954	99	31	29,2	cyclictest	4108758	-21	kworker/u16:3+flush-8:0	22:13:27	5
3871949	99	31	29,2	cyclictest	4193296	-21	kworker/u16:2+flush-8:0	22:41:16	4
3871949	99	31	29,2	cyclictest	4193296	-21	kworker/u16:2+flush-8:0	21:47:51	4
3871949	99	31	29,2	cyclictest	4178909	-21	kworker/u16:0+flush-8:0	22:32:39	4
3871949	99	31	29,2	cyclictest	265616	-21	kworker/u16:5+events_unbound	00:20:07	4
3871949	99	31	29,2	cyclictest	166859	-21	kworker/u16:3+flush-8:0	22:59:24	4
3871949	99	31	29,2	cyclictest	166859	-21	kworker/u16:3+events_unbound	23:30:40	4
3871949	99	31	29,2	cyclictest	154321	-21	kworker/u16:1+events_unbound	23:05:59	4
3871962	99	30	29,0	cyclictest	0	-21	swapper/7	22:18:00	7
3871962	99	30	29,0	cyclictest	0	-21	swapper/7	21:14:16	7
3871958	99	30	28,2	cyclictest	4193296	-21	kworker/u16:2+events_unbound	22:02:24	6
3871958	99	30	28,2	cyclictest	4178909	-21	kworker/u16:0+events_unbound	22:06:52	6
3871958	99	30	28,2	cyclictest	4178909	-21	kworker/u16:0+events_unbound	21:56:05	6
3871958	99	30	28,2	cyclictest	4178909	-21	kworker/u16:0+events_unbound	21:40:09	6
3871958	99	30	28,2	cyclictest	4050749	-21	kworker/u16:2+flush-8:0	20:41:49	6
3871958	99	30	28,2	cyclictest	313468	-21	kworker/u16:2+flush-8:0	00:11:13	6
3871958	99	30	28,2	cyclictest	166859	-21	kworker/u16:3+flush-8:0	22:56:43	6
3871958	99	30	28,2	cyclictest	154321	-21	kworker/u16:1+flush-8:0	23:11:39	6
3871958	99	30	28,2	cyclictest	154321	-21	kworker/u16:1+flush-8:0	23:11:39	6
3871954	99	30	28,2	cyclictest	4193296	-21	kworker/u16:2+flush-8:0	23:23:36	5
3871954	99	30	28,2	cyclictest	265616	-21	kworker/u16:5+events_unbound	00:20:28	5
3871954	99	30	27,2	cyclictest	265616	-21	kworker/u16:5+flush-8:0	23:53:48	5
3871949	99	30	28,2	cyclictest	4108758	-21	kworker/u16:3+events_unbound	21:51:29	4
3871949	99	30	28,2	cyclictest	4108758	-21	kworker/u16:3+events_unbound	21:51:29	4
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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