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
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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 Tue May 26, 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
928458	99	46	43,2	cyclictest	1073899	-21	kworker/u8:0+events_unbound	21:35:24	3
928458	99	45	42,2	cyclictest	1219688	-21	kworker/u8:1+events_unbound	00:05:24	3
928450	99	45	39,4	cyclictest	954218	-21	latency_hist	19:35:00	1
928453	99	44	41,2	cyclictest	1173268	-21	kworker/u8:4+flush-259:0	23:55:20	2
928453	99	43	39,3	cyclictest	869868	-21	kworker/u8:1+events_unbound	19:40:10	2
928458	99	41	38,2	cyclictest	1130883	-21	kworker/u8:3+events_unbound	23:20:22	3
928458	99	41	38,2	cyclictest	1073899	-21	kworker/u8:0+events_unbound	22:00:22	3
928453	99	41	38,2	cyclictest	1130883	-21	kworker/u8:3+flush-259:0	22:40:01	2
928453	99	41	38,2	cyclictest	1130883	-21	kworker/u8:3+flush-259:0	22:40:00	2
928453	99	41	38,2	cyclictest	1110088	-21	kworker/u8:2+flush-259:0	22:10:01	2
928448	99	41	37,2	cyclictest	21	1	rcuc/0	20:45:00	0
928458	99	40	37,2	cyclictest	965617	-21	kworker/u8:4+events_unbound	20:00:16	3
928458	99	40	35,4	cyclictest	1001666	-21	latency_hist	20:20:00	3
928450	99	40	37,2	cyclictest	1053110	-21	kworker/u8:3+events_unbound	21:40:16	1
928458	99	39	35,3	cyclictest	1110301	-21	/usr/sbin/munin	22:05:23	3
928453	99	39	36,2	cyclictest	1193647	-21	kworker/u8:2+events_unbound	23:30:15	2
928450	99	39	34,3	cyclictest	964968	-21	latency_hist	19:45:00	1
928448	99	39	35,3	cyclictest	1120393	-21	gpgv	22:14:59	0
928458	99	38	35,2	cyclictest	1136267	-21	kworker/u8:2+events_unbound	22:40:23	3
928453	99	38	35,2	cyclictest	1053110	-21	kworker/u8:3+flush-259:0	22:10:24	2
928448	99	38	33,3	cyclictest	980975	-21	latency_hist	20:00:00	0
928458	99	37	34,2	cyclictest	1193647	-21	kworker/u8:2+flush-259:0	23:30:22	3
928458	99	37	34,2	cyclictest	1136267	-21	kworker/u8:2+events_unbound	22:45:18	3
928450	99	37	33,3	cyclictest	1053110	-21	kworker/u8:3+flush-259:0	22:05:00	1
928458	99	36	33,2	cyclictest	996528	-21	kworker/u8:2+events_unbound	20:45:14	3
928458	99	36	33,2	cyclictest	1240430	-21	kworker/u8:0+flush-259:0	00:35:20	3
928458	99	36	33,2	cyclictest	1173268	-21	kworker/u8:4+flush-259:0	00:20:25	3
928458	99	36	32,3	cyclictest	869868	-21	kworker/u8:1+events_unbound	19:30:17	3
928448	99	36	30,4	cyclictest	1264962	-21	ntpq	00:30:20	0
928458	99	35	32,2	cyclictest	975805	-21	kworker/u8:1+events_unbound	19:55:17	3
928458	99	35	32,2	cyclictest	1240430	-21	kworker/u8:0+events_unbound	00:30:24	3
928458	99	35	32,2	cyclictest	1173268	-21	kworker/u8:4+events_unbound	23:40:20	3
928458	99	35	27,2	cyclictest	1173268	-21	kworker/u8:4+events_unbound	00:00:15	3
928453	99	35	32,2	cyclictest	1027365	-21	kworker/u8:1+flush-259:0	21:10:23	2
928448	99	35	30,3	cyclictest	965567	-21	base64	19:45:01	0
928458	99	34	31,2	cyclictest	869868	-21	kworker/u8:1+flush-259:0	19:10:21	3
928458	99	34	31,2	cyclictest	1219688	-21	kworker/u8:1+flush-259:0	23:50:24	3
928453	99	34	31,2	cyclictest	1073899	-21	kworker/u8:0+flush-259:0	22:00:20	2
928453	99	34	31,2	cyclictest	1027365	-21	kworker/u8:1+flush-259:0	21:00:25	2
928450	99	34	30,2	cyclictest	1142073	-21	kworker/u8:0+flush-259:0	23:40:01	1
928458	99	33	29,3	cyclictest	1173268	-21	kworker/u8:4+events_unbound	23:35:18	3
928458	99	33	29,3	cyclictest	1142073	-21	kworker/u8:0+events_unbound	22:55:21	3
928458	99	33	28,4	cyclictest	965626	-21	/usr/sbin/munin	19:45:14	3
928453	99	33	30,2	cyclictest	1136267	-21	kworker/u8:2+events_unbound	22:50:20	2
928453	99	33	29,3	cyclictest	1147271	-21	apt-get	22:40:13	2
928450	99	33	29,2	cyclictest	869868	-21	kworker/u8:1+flush-259:0	19:10:15	1
928458	99	32	29,2	cyclictest	1142073	-21	kworker/u8:0+flush-259:0	23:00:21	3
928458	99	32	29,2	cyclictest	1073899	-21	kworker/u8:0+flush-259:0	21:55:15	3
928458	99	32	29,2	cyclictest	1027365	-21	kworker/u8:1+events_unbound	21:30:22	3
928453	99	32	29,2	cyclictest	1053110	-21	kworker/u8:3+flush-259:0	21:40:21	2
928448	99	32	26,4	cyclictest	1229913	-21	latency_hist	00:00:01	0
928458	99	31	28,3	cyclictest	1053110	-21	kworker/u8:3+flush-259:0	21:45:16	3
928458	99	31	28,2	cyclictest	996528	-21	kworker/u8:2+flush-259:0	20:55:22	3
928458	99	31	28,2	cyclictest	938469	-21	kworker/u8:2+events_unbound	19:25:14	3
928458	99	31	28,2	cyclictest	1130883	-21	kworker/u8:3+events_unbound	22:30:22	3
928453	99	31	28,2	cyclictest	965617	-21	kworker/u8:4+flush-259:0	20:00:20	2
928453	99	31	28,2	cyclictest	1053110	-21	kworker/u8:3+flush-259:0	21:50:16	2
928453	99	31	26,3	cyclictest	938469	-21	kworker/u8:2+flush-259:0	19:25:17	2
928448	99	31	26,4	cyclictest	1036764	-21	ntpq	20:50:23	0
928448	99	31	25,4	cyclictest	335557	-21	systemd-journal	21:58:29	0
928458	99	30	26,3	cyclictest	1110088	-21	kworker/u8:2+events_unbound	22:15:01	3
928453	99	30	27,2	cyclictest	1006831	-21	kworker/u8:3+events_unbound	20:35:22	2
928453	99	30	26,3	cyclictest	1130883	-21	kworker/u8:3+events_unbound	22:30:27	2
928450	99	30	28,1	cyclictest	1073899	-21	kworker/u8:0+events_unbound	22:05:14	1
928450	99	30	27,2	cyclictest	975805	-21	kworker/u8:1+events_unbound	20:30:15	1
928448	99	30	27,2	cyclictest	1173268	-21	kworker/u8:4+events_unbound	00:00:20	0
928458	99	29	26,2	cyclictest	918350	-21	kworker/u8:0+events_unbound	19:15:20	3
928458	99	29	26,2	cyclictest	1173268	-21	kworker/u8:4+events_unbound	23:55:24	3
928453	99	29	26,2	cyclictest	965617	-21	kworker/u8:4+flush-259:0	19:55:20	2
928453	99	29	26,2	cyclictest	1173268	-21	kworker/u8:4+flush-259:0	23:10:16	2
928453	99	29	26,2	cyclictest	1110088	-21	kworker/u8:2+events_unbound	22:15:17	2
928453	99	29	26,2	cyclictest	1027365	-21	kworker/u8:1+events_unbound	20:50:19	2
928453	99	29	25,3	cyclictest	1053110	-21	kworker/u8:3+events_unbound	21:45:21	2
928450	99	29	25,3	cyclictest	1168344	-21	apt-get	23:00:11	1
928448	99	29	25,3	cyclictest	996528	-21	kworker/u8:2+flush-259:0	21:05:21	0
928458	99	28	25,2	cyclictest	996528	-21	kworker/u8:2+events_unbound	20:40:12	3
928458	99	28	25,2	cyclictest	1240430	-21	kworker/u8:0+events_unbound	00:15:14	3
928458	99	28	25,2	cyclictest	1173268	-21	kworker/u8:4+flush-259:0	23:10:19	3
928453	99	28	26,2	cyclictest	1142073	-21	kworker/u8:0+flush-259:0	23:05:20	2
928453	99	28	25,2	cyclictest	1053110	-21	kworker/u8:3+flush-259:0	21:35:20	2
928453	99	28	24,3	cyclictest	1136259	-21	gpgv	22:30:00	2
928450	99	28	25,2	cyclictest	1193647	-21	kworker/u8:2+events_unbound	23:25:22	1
928448	99	28	23,3	cyclictest	335557	-21	systemd-journal	23:37:39	0
928458	99	27	24,2	cyclictest	869868	-21	kworker/u8:1+events_unbound	19:40:18	3
928453	99	27	24,2	cyclictest	869868	-21	kworker/u8:1+flush-259:0	19:30:21	2
928453	99	27	24,2	cyclictest	1219688	-21	kworker/u8:1+flush-259:0	00:05:21	2
928453	99	27	24,2	cyclictest	1110088	-21	kworker/u8:2+events_unbound	22:20:14	2
928450	99	27	24,2	cyclictest	1240430	-21	kworker/u8:0+events_unbound	00:35:22	1
928450	99	27	23,3	cyclictest	1073899	-21	kworker/u8:0+events_unbound	22:21:30	1
928458	99	26	23,2	cyclictest	996528	-21	kworker/u8:2+events_unbound	21:05:22	3
928458	99	26	23,2	cyclictest	1006831	-21	kworker/u8:3+flush-259:0	20:25:20	3
928453	99	26	23,2	cyclictest	1130883	-21	kworker/u8:3+events_unbound	23:00:22	2
928453	99	26	21,4	cyclictest	1073664	-21	latency_hist	21:30:01	2
928450	99	26	23,2	cyclictest	959370	-21	kworker/u8:0+events_unbound	19:50:26	1
928450	99	26	23,2	cyclictest	1130883	-21	kworker/u8:3+flush-259:0	23:15:20	1
928450	99	26	18,3	cyclictest	996528	-21	kworker/u8:2+events_unbound	20:15:22	1
928448	99	26	22,3	cyclictest	918350	-21	kworker/u8:0+events_unbound	19:15:22	0
928458	99	25	22,2	cyclictest	1142073	-21	kworker/u8:0+flush-259:0	23:45:19	3
928458	99	25	22,2	cyclictest	1136267	-21	kworker/u8:2+events_unbound	22:35:16	3
928458	99	25	22,2	cyclictest	1136267	-21	kworker/u8:2+events_unbound	22:35:15	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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