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 Mon Apr 27, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
316297	99	50	44,4	cyclictest	326528	-21	latency_hist	19:20:01	1
316297	99	49	45,3	cyclictest	591361	-21	kworker/u8:1+flush-259:0	00:15:00	1
316306	99	48	45,2	cyclictest	591361	-21	kworker/u8:1+flush-259:0	00:00:23	3
316292	99	48	45,2	cyclictest	512901	-21	kworker/u8:3+events_unbound	00:15:25	0
316292	99	47	42,4	cyclictest	316461	-21	/usr/sbin/munin	19:10:14	0
316302	99	46	40,4	cyclictest	611064	-21	apt-get	23:50:27	2
316306	99	43	36,5	cyclictest	564784	-21	kworker/u8:0+flush-259:0	23:35:16	3
316292	99	43	37,5	cyclictest	336803	-21	latency_hist	19:30:01	0
316306	99	41	38,2	cyclictest	347197	-21	kworker/u8:0+events_unbound	20:55:17	3
316292	99	40	33,5	cyclictest	439586	-21	ntpq	21:05:21	0
316306	99	39	36,2	cyclictest	321410	-21	kworker/u8:1+events_unbound	20:10:23	3
316306	99	39	35,3	cyclictest	321410	-21	kworker/u8:1+events_unbound	22:15:14	3
316297	99	39	36,2	cyclictest	321410	-21	kworker/u8:1+flush-259:0	19:49:59	1
316306	99	38	34,3	cyclictest	591361	-21	kworker/u8:1+flush-259:0	00:35:23	3
316292	99	38	31,5	cyclictest	506823	-21	ntpq	22:10:20	0
316306	99	37	33,3	cyclictest	512901	-21	kworker/u8:3+flush-259:0	00:10:23	3
316297	99	37	30,4	cyclictest	362495	-21	ntpq	19:50:23	1
316302	99	36	29,5	cyclictest	600694	-21	latency_hist	23:45:01	2
316306	99	35	31,3	cyclictest	512901	-21	kworker/u8:3+flush-259:0	22:40:26	3
316306	99	35	29,3	cyclictest	347197	-21	kworker/u8:0+flush-259:0	20:00:20	3
316306	99	35	29,3	cyclictest	347197	-21	kworker/u8:0+flush-259:0	20:00:19	3
316292	99	35	33,2	cyclictest	300387	-21	kworker/u8:2+events_unbound	19:30:17	0
316306	99	34	31,2	cyclictest	512901	-21	kworker/u8:3+flush-259:0	23:05:23	3
316306	99	34	30,3	cyclictest	512901	-21	kworker/u8:3+flush-259:0	22:30:00	3
316302	99	34	28,4	cyclictest	252	-21	systemd-journal	21:20:01	2
316302	99	34	27,5	cyclictest	316195	-21	latency_hist	19:10:00	2
316297	99	34	30,3	cyclictest	321410	-21	kworker/u8:1+flush-259:0	21:55:17	1
316292	99	34	32,2	cyclictest	347197	-21	kworker/u8:0+events_unbound	20:56:51	0
316292	99	34	31,2	cyclictest	533430	-21	kworker/u8:2+events_unbound	22:55:13	0
316292	99	34	31,2	cyclictest	512901	-21	kworker/u8:3+events_unbound	00:13:28	0
316292	99	34	31,2	cyclictest	347197	-21	kworker/u8:0+events_unbound	20:21:33	0
316292	99	34	31,2	cyclictest	347197	-21	kworker/u8:0+events_unbound	20:09:33	0
316306	99	33	30,2	cyclictest	321410	-21	kworker/u8:1+flush-259:0	21:00:19	3
316297	99	33	29,3	cyclictest	300387	-21	kworker/u8:2+flush-259:0	19:35:20	1
316297	99	33	25,5	cyclictest	470411	-21	ntpq	21:35:20	1
316292	99	33	31,2	cyclictest	321410	-21	kworker/u8:1+events_unbound	19:48:33	0
316292	99	33	30,3	cyclictest	564784	-21	kworker/u8:0+events_unbound	23:22:35	0
316292	99	33	30,2	cyclictest	347197	-21	kworker/u8:0+events_unbound	20:12:34	0
316292	99	33	30,2	cyclictest	321410	-21	kworker/u8:1+events_unbound	22:34:33	0
316292	99	33	30,2	cyclictest	321410	-21	kworker/u8:1+events_unbound	21:53:33	0
316292	99	33	30,2	cyclictest	321410	-21	kworker/u8:1+events_unbound	21:00:28	0
316292	99	33	30,2	cyclictest	321410	-21	kworker/u8:1+events_unbound	20:31:35	0
316292	99	33	26,6	cyclictest	610614	-21	ntpq	23:50:22	0
316302	99	32	20,4	cyclictest	559620	-21	latency_hist	23:05:01	2
316297	99	32	25,5	cyclictest	528529	-21	/usr/sbin/munin	22:35:14	1
316292	99	32	30,2	cyclictest	591361	-21	kworker/u8:1+events_unbound	23:35:26	0
316292	99	32	30,2	cyclictest	321410	-21	kworker/u8:1+events_unbound	19:50:17	0
316292	99	32	29,2	cyclictest	347197	-21	kworker/u8:0+events_unbound	21:24:34	0
316292	99	32	28,3	cyclictest	512901	-21	kworker/u8:3+events_unbound	22:24:34	0
316292	99	32	26,5	cyclictest	574076	-21	ntpq	23:15:20	0
316292	99	32	25,5	cyclictest	491436	-21	ntpq	21:55:22	0
316306	99	31	27,3	cyclictest	591361	-21	kworker/u8:1+flush-259:0	00:25:23	3
316306	99	31	27,3	cyclictest	321410	-21	kworker/u8:1+flush-259:0	19:55:14	3
316292	99	31	28,3	cyclictest	564784	-21	kworker/u8:0+events_unbound	23:33:33	0
316292	99	31	28,2	cyclictest	347197	-21	kworker/u8:0+events_unbound	21:40:25	0
316292	99	31	28,2	cyclictest	347197	-21	kworker/u8:0+events_unbound	20:17:34	0
316306	99	30	26,3	cyclictest	564784	-21	kworker/u8:0+flush-259:0	23:10:16	3
316306	99	30	25,3	cyclictest	300387	-21	kworker/u8:2+flush-259:0	19:30:19	3
316302	99	30	24,4	cyclictest	554428	-21	latency_hist	23:00:01	2
316302	99	30	23,5	cyclictest	461065	-21	latency_hist	21:30:01	2
316297	99	30	26,3	cyclictest	321410	-21	kworker/u8:1+flush-259:0	21:50:25	1
316297	99	30	25,3	cyclictest	300387	-21	kworker/u8:2+flush-259:0	19:30:22	1
316292	99	30	28,2	cyclictest	321410	-21	kworker/u8:1+events_unbound	20:48:35	0
316292	99	30	27,2	cyclictest	404516	-21	kworker/u8:2+events_unbound	20:41:47	0
316292	99	30	25,2	cyclictest	321410	-21	kworker/u8:1+events_unbound	20:25:16	0
316306	99	29	26,2	cyclictest	591361	-21	kworker/u8:1+flush-259:0	23:50:13	3
316306	99	29	26,2	cyclictest	347197	-21	kworker/u8:0+events_unbound	21:54:59	3
316306	99	29	25,3	cyclictest	347197	-21	kworker/u8:0+events_unbound	21:10:21	3
316297	99	29	25,2	cyclictest	409917	-21	apt-get	20:40:12	1
316292	99	29	26,2	cyclictest	321410	-21	kworker/u8:1+events_unbound	21:25:26	0
316292	99	29	26,2	cyclictest	300387	-21	kworker/u8:2+events_unbound	19:35:28	0
316306	99	28	25,2	cyclictest	321410	-21	kworker/u8:1+flush-259:0	21:35:23	3
316306	99	28	23,3	cyclictest	533430	-21	kworker/u8:2+flush-259:0	22:55:21	3
316292	99	28	25,2	cyclictest	512901	-21	kworker/u8:3+events_unbound	23:40:32	0
316292	99	28	23,4	cyclictest	512901	-21	kworker/u8:3+flush-259:0	00:10:00	0
316306	99	27	24,2	cyclictest	564784	-21	kworker/u8:0+events_unbound	23:25:26	3
316306	99	27	24,2	cyclictest	321410	-21	kworker/u8:1+flush-259:0	20:45:20	3
316306	99	27	23,3	cyclictest	591361	-21	kworker/u8:1+events_unbound	23:45:14	3
316306	99	27	23,3	cyclictest	347197	-21	kworker/u8:0+events_unbound	20:51:48	3
316306	99	27	23,3	cyclictest	300387	-21	kworker/u8:2+flush-259:0	19:25:18	3
316306	99	27	22,3	cyclictest	512901	-21	kworker/u8:3+events_unbound	23:55:11	3
316297	99	27	19,6	cyclictest	601100	-21	apt-key	23:45:01	1
316306	99	26	23,2	cyclictest	321410	-21	kworker/u8:1+flush-259:0	20:20:00	3
316306	99	26	23,2	cyclictest	321410	-21	kworker/u8:1+events_unbound	20:30:26	3
316306	99	26	22,3	cyclictest	591361	-21	kworker/u8:1+flush-259:0	00:20:18	3
316306	99	26	19,5	cyclictest	538829	-21	/usr/sbin/munin	22:45:15	3
316297	99	26	23,2	cyclictest	347197	-21	kworker/u8:0+events_unbound	22:10:17	1
316297	99	26	22,3	cyclictest	347197	-21	kworker/u8:0+flush-259:0	20:55:00	1
316297	99	26	22,3	cyclictest	347197	-21	kworker/u8:0+flush-259:0	19:40:18	1
316297	99	26	20,4	cyclictest	252	-21	systemd-journal	19:27:33	1
316292	99	26	23,2	cyclictest	512901	-21	kworker/u8:3+events_unbound	22:26:33	0
316292	99	26	23,2	cyclictest	321410	-21	kworker/u8:1+events_unbound	21:36:58	0
316306	99	25	22,2	cyclictest	512901	-21	kworker/u8:3+flush-259:0	22:20:23	3
316306	99	25	21,3	cyclictest	591361	-21	kworker/u8:1+events_unbound	00:05:21	3
316306	99	25	21,3	cyclictest	321410	-21	kworker/u8:1+events_unbound	21:25:16	3
316302	99	25	19,4	cyclictest	252	-21	systemd-journal	21:24:55	2
316297	99	25	21,3	cyclictest	512901	-21	kworker/u8:3+flush-259:0	23:55:23	1
316297	99	25	17,5	cyclictest	584409	-21	ntpq	23:25:23	1
316292	99	25	22,2	cyclictest	591361	-21	kworker/u8:1+events_unbound	00:34:44	0
316292	99	25	22,2	cyclictest	512901	-21	kworker/u8:3+events_unbound	23:08:34	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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