OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #4

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rackeslot4s.osadl.org (updated Sun Aug 23, 2026 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4033091	99	54	49,3	cyclictest	4054017	-21	apt-get	19:30:12	0
4033097	99	46	43,2	cyclictest	4122253	-21	kworker/u8:0+events_unbound	21:30:24	2
4033093	99	44	40,2	cyclictest	169290	-21	apt-get	00:25:10	1
4033097	99	39	33,4	cyclictest	147498	-21	apt-get	00:05:02	2
4033093	99	39	33,4	cyclictest	4138024	-21	cat	20:50:00	1
4033097	99	37	34,2	cyclictest	4143558	-21	kworker/u8:3+flush-259:0	21:15:24	2
4033093	99	37	32,3	cyclictest	4080273	-21	kworker/u8:1+flush-259:0	20:20:24	1
4033102	99	36	30,4	cyclictest	126648	-21	apt-get	23:45:12	3
4033091	99	36	30,4	cyclictest	69210	-21	cat	22:50:01	0
4033097	99	35	31,3	cyclictest	4085429	-21	kworker/u8:2+flush-259:0	20:15:24	2
4033097	99	34	31,2	cyclictest	48155	-21	kworker/u8:4+flush-259:0	22:40:28	2
4033097	99	34	31,2	cyclictest	48155	-21	kworker/u8:4+flush-259:0	22:40:27	2
4033097	99	33	30,2	cyclictest	4143558	-21	kworker/u8:3+flush-259:0	21:05:27	2
4033097	99	33	30,2	cyclictest	100564	-21	kworker/u8:0+flush-259:0	23:25:01	2
4033097	99	33	29,3	cyclictest	153084	-21	kworker/u8:0+flush-259:0	00:30:24	2
4033102	99	32	27,4	cyclictest	4179520	-21	kworker/u8:1+flush-259:0	21:40:10	3
4033091	99	32	28,3	cyclictest	69089	-21	kworker/u8:3+flush-259:0	23:00:00	0
4033091	99	32	26,4	cyclictest	162573	-21	ntpq	00:15:23	0
4033102	99	31	27,3	cyclictest	4064399	-21	apt-get	19:40:11	3
4033091	99	31	26,4	cyclictest	141895	-21	latency_hist	00:00:01	0
4033102	99	30	25,4	cyclictest	69165	-21	gpgv	22:50:00	3
4033097	99	30	26,3	cyclictest	48155	-21	kworker/u8:4+flush-259:0	22:35:25	2
4033093	99	30	24,4	cyclictest	147943	-21	cat	00:05:03	1
4033091	99	30	26,3	cyclictest	4080273	-21	kworker/u8:1+flush-259:0	20:05:18	0
4033102	99	29	26,2	cyclictest	4111599	-21	gpgv	20:25:00	3
4033102	99	29	26,2	cyclictest	335557	-21	systemd-journal	19:25:01	3
4033102	99	29	26,2	cyclictest	1980379	-21	kworker/u8:3+flush-259:0	20:00:17	3
4033093	99	29	25,3	cyclictest	69738	-21	apt-get	22:50:14	1
4033093	99	28	25,2	cyclictest	95130	-21	kworker/u8:1+events_unbound	23:25:18	1
4033093	99	28	24,3	cyclictest	4137760	-21	kworker/u8:1+events_unbound	20:55:12	1
4033091	99	28	22,4	cyclictest	11770	-21	latency_hist	21:55:00	0
4033102	99	27	24,2	cyclictest	4122253	-21	kworker/u8:0+flush-259:0	22:10:25	3
4033102	99	27	22,3	cyclictest	4096171	-21	base64	20:10:01	3
4033097	99	27	24,3	cyclictest	153084	-21	kworker/u8:0+flush-259:0	00:15:24	2
4033093	99	27	23,3	cyclictest	4095701	-21	cat	20:10:00	1
4033093	99	27	23,2	cyclictest	4069921	-21	kworker/u8:4+events_unbound	19:45:17	1
4033091	99	27	23,2	cyclictest	111141	-21	apt-get	23:30:11	0
4033091	99	27	22,4	cyclictest	153329	-21	apt-get	00:10:12	0
4033102	99	26	20,4	cyclictest	100780	-21	/usr/sbin/munin	23:20:15	3
4033097	99	26	19,5	cyclictest	168706	-21	cp	00:25:00	2
4033093	99	26	21,4	cyclictest	43471	-21	apt-get	22:25:13	1
4033093	99	26	21,3	cyclictest	22145	-21	gpgv	22:04:59	1
4033091	99	26	22,3	cyclictest	4143593	-21	apt-get	20:55:12	0
4033091	99	26	20,4	cyclictest	90423	-21	/usr/sbin/munin	23:10:14	0
4033102	99	25	18,4	cyclictest	4158836	-21	latency_hist	21:10:01	3
4033097	99	25	21,3	cyclictest	69089	-21	kworker/u8:3+flush-259:0	23:00:25	2
4033093	99	25	22,2	cyclictest	4143558	-21	kworker/u8:3+flush-259:0	21:20:15	1
4033093	99	25	21,3	cyclictest	1980379	-21	kworker/u8:3+events_unbound	19:40:12	1
4033091	99	25	21,3	cyclictest	4169209	-21	kworker/u8:2+flush-259:0	21:35:26	0
4033102	99	24	20,2	cyclictest	168604	-21	apt-get	00:25:02	3
4033102	99	24	18,4	cyclictest	4043369	-21	latency_hist	19:20:01	3
4033097	99	24	21,3	cyclictest	1980379	-21	kworker/u8:3+flush-259:0	19:48:55	2
4033093	99	24	21,2	cyclictest	48155	-21	kworker/u8:4+flush-259:0	22:40:20	1
4033093	99	24	21,2	cyclictest	48155	-21	kworker/u8:4+flush-259:0	22:40:19	1
4033093	99	24	21,2	cyclictest	4169209	-21	kworker/u8:2+flush-259:0	21:25:23	1
4033093	99	24	21,2	cyclictest	153084	-21	kworker/u8:0+events_unbound	00:24:56	1
4033091	99	24	19,3	cyclictest	4174605	-21	apt-get	21:25:10	0
4033102	99	23	20,2	cyclictest	507	-21	in:imuxsock	23:15:00	3
4033102	99	23	16,5	cyclictest	148356	-21	diskstats	00:05:15	3
4033097	99	23	20,2	cyclictest	4127621	-21	kworker/u8:2+events_unbound	20:50:23	2
4033097	99	23	20,2	cyclictest	4080273	-21	kworker/u8:1+flush-259:0	20:05:25	2
4033097	99	23	19,3	cyclictest	43228	-21	kworker/u8:0+events_unbound	23:06:57	2
4033091	99	23	20,2	cyclictest	4143329	-21	cut	20:55:00	0
4033097	99	22	18,3	cyclictest	126651	-21	kworker/u8:4+events_unbound	23:55:18	2
4033093	99	22	20,1	cyclictest	4080273	-21	kworker/u8:1+events_unbound	20:25:20	1
4033093	99	22	17,4	cyclictest	57906	-21	ntpq	22:35:22	1
4033093	99	22	17,4	cyclictest	4096239	-21	apt-get	20:10:11	1
4033091	99	22	19,2	cyclictest	27079	-21	kworker/u8:2+flush-259:0	22:30:24	0
4033097	99	21	18,2	cyclictest	507	-21	in:imuxsock	23:40:00	2
4033097	99	21	18,2	cyclictest	4137760	-21	kworker/u8:1+flush-259:0	21:00:15	2
4033097	99	21	18,2	cyclictest	4122253	-21	kworker/u8:0+events_unbound	20:47:04	2
4033097	99	21	18,2	cyclictest	27679	-21	cron	22:09:59	2
4033097	99	21	17,3	cyclictest	69089	-21	kworker/u8:3+events_unbound	23:13:55	2
4033093	99	21	18,2	cyclictest	953666	-21	kworker/u8:2+events_unbound	19:15:18	1
4033093	99	21	18,2	cyclictest	95130	-21	kworker/u8:1+events_unbound	23:40:00	1
4033093	99	21	18,2	cyclictest	4179520	-21	kworker/u8:1+flush-259:0	21:50:21	1
4033093	99	21	18,2	cyclictest	4179520	-21	kworker/u8:1+events_unbound	21:40:15	1
4033093	99	21	18,2	cyclictest	4085198	-21	munin-plugin-st	20:00:00	1
4033093	99	21	18,2	cyclictest	4052772	-21	needreboot	19:25:20	1
4033093	99	21	17,3	cyclictest	4122253	-21	kworker/u8:0+flush-259:0	21:15:16	1
4033093	99	21	17,3	cyclictest	3984853	-21	kworker/u8:0+events_unbound	19:35:00	1
4033102	99	20	14,4	cyclictest	509	-21	rs:main		3
4033102	99	20	14,4	cyclictest	3984853	-21	kworker/u8:0+flush-259:0	19:30:16	3
4033097	99	20	18,2	cyclictest	126651	-21	kworker/u8:4+flush-259:0	00:00:16	2
4033097	99	20	17,2	cyclictest	43228	-21	kworker/u8:0+events_unbound	22:49:56	2
4033097	99	20	17,2	cyclictest	4085429	-21	kworker/u8:2+events_unbound	20:10:21	2
4033097	99	20	17,2	cyclictest	4038764	-21	kworker/u8:1+flush-259:0	19:25:16	2
4033097	99	20	16,3	cyclictest	126651	-21	kworker/u8:4+events_unbound	23:50:55	2
4033093	99	20	17,2	cyclictest	1018	-21	kworker/u8:3+events_unbound	22:22:55	1
4033093	99	20	16,3	cyclictest	4179520	-21	kworker/u8:1+events_unbound	21:49:57	1
4033091	99	20	16,3	cyclictest	4179520	-21	kworker/u8:1+flush-259:0	21:40:17	0
4033091	99	20	15,3	cyclictest	74691	-21	true	22:55:00	0
4033091	99	20	14,4	cyclictest	4111669	-21	cat	20:25:01	0
4033091	99	20	14,4	cyclictest	4047673	-21	ntpq	19:20:19	0
4033102	99	19	15,3	cyclictest	4137760	-21	kworker/u8:1+flush-259:0	21:00:22	3
4033097	99	19	16,2	cyclictest	1018	-21	kworker/u8:3+events_unbound	22:22:27	2
4033097	99	19	14,3	cyclictest	4179520	-21	kworker/u8:1+events_unbound	21:40:17	2
4033093	99	19	17,2	cyclictest	4122253	-21	kworker/u8:0+events_unbound	20:42:56	1
4033093	99	19	16,2	cyclictest	95130	-21	kworker/u8:1+events_unbound	23:15:17	1
4033093	99	19	16,2	cyclictest	126651	-21	kworker/u8:4+events_unbound	23:48:54	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34