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 Mon May 04, 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
1629919	99	44	36,5	cyclictest	1738885	-21	latency_hist	20:55:00	3
1629913	99	44	41,2	cyclictest	1744098	-21	kworker/u8:3+events_unbound	21:30:20	2
1629907	99	44	40,3	cyclictest	1718329	-21	kworker/u8:2+flush-259:0	20:35:00	0
1629913	99	43	40,2	cyclictest	1931016	-21	kworker/u8:0+flush-259:0	00:20:22	2
1629913	99	43	39,3	cyclictest	1692582	-21	kworker/u8:0+flush-259:0	20:25:21	2
1629907	99	43	38,3	cyclictest	1624745	-21	kworker/u8:2+events_unbound	19:20:01	0
1629919	99	41	34,5	cyclictest	1862753	-21	ntpq	22:50:21	3
1629913	99	39	33,4	cyclictest	1635147	-21	cp	19:15:01	2
1629919	99	38	31,5	cyclictest	1784895	-21	ntpq	21:35:23	3
1629910	99	38	28,2	cyclictest	1785580	-21	kworker/u8:0+events_unbound	22:05:01	1
1629913	99	37	31,4	cyclictest	1759594	-21	latency_hist	21:15:01	2
1629910	99	37	34,2	cyclictest	1874151	-21	kworker/u8:2+events_unbound	23:05:21	1
1629913	99	36	33,2	cyclictest	1931016	-21	kworker/u8:0+flush-259:0	00:10:01	2
1629913	99	36	32,3	cyclictest	1796298	-21	kworker/u8:3+flush-259:0	22:10:21	2
1629913	99	36	31,3	cyclictest	252	-21	systemd-journal	00:03:33	2
1629910	99	36	33,2	cyclictest	1785580	-21	kworker/u8:0+flush-259:0	21:50:21	1
1629907	99	36	29,5	cyclictest	1821025	-21	ntpq	22:10:20	0
1629919	99	35	30,3	cyclictest	1656803	-21	apt-get	19:35:13	3
1629913	99	34	31,2	cyclictest	1904846	-21	kworker/u8:2+flush-259:0	23:50:00	2
1629913	99	34	31,2	cyclictest	1744098	-21	kworker/u8:3+flush-259:0	21:20:00	2
1629910	99	34	27,5	cyclictest	1639811	-21	ntpq	19:15:21	1
1629913	99	33	30,2	cyclictest	1692582	-21	kworker/u8:0+events_unbound	20:30:22	2
1629913	99	33	30,2	cyclictest	1645868	-21	kworker/u8:3+flush-259:0	20:00:00	2
1629913	99	33	29,3	cyclictest	1848399	-21	kworker/u8:3+events_unbound	22:45:00	2
1629910	99	33	30,2	cyclictest	1738755	-21	kworker/u8:4+flush-259:0	21:10:00	1
1629919	99	32	27,3	cyclictest	1962151	-21	apt-get	00:30:11	3
1629910	99	32	29,2	cyclictest	1790973	-21	kworker/u8:2+flush-259:0	21:45:21	1
1629907	99	32	28,3	cyclictest	1894520	-21	kworker/u8:0+flush-259:0	23:35:18	0
1629919	99	31	26,4	cyclictest	509	-21	rs:main		3
1629913	99	31	28,2	cyclictest	1848399	-21	kworker/u8:3+events_unbound	22:45:24	2
1629910	99	31	29,1	cyclictest	3654797	-21	kworker/u8:0+flush-259:0	19:20:21	1
1629919	99	30	24,4	cyclictest	1661940	-21	/usr/sbin/munin	19:40:23	3
1629913	99	30	27,2	cyclictest	1790973	-21	kworker/u8:2+events_unbound	21:45:18	2
1629913	99	30	26,3	cyclictest	1785580	-21	kworker/u8:0+flush-259:0	22:00:21	2
1629913	99	30	26,3	cyclictest	1758688	-21	kworker/u8:1+events_unbound	21:20:24	2
1629910	99	30	27,2	cyclictest	1738755	-21	kworker/u8:4+flush-259:0	20:55:21	1
1629907	99	30	26,3	cyclictest	3654797	-21	kworker/u8:0+flush-259:0	19:10:14	0
1629907	99	30	26,3	cyclictest	1925764	-21	kworker/u8:1+flush-259:0	00:05:25	0
1629907	99	30	26,3	cyclictest	1744098	-21	kworker/u8:3+events_unbound	21:20:12	0
1629907	99	30	26,3	cyclictest	1708045	-21	kworker/u8:3+events_unbound	20:40:17	0
1629907	99	30	22,6	cyclictest	1650508	-21	ntpq	19:25:21	0
1629913	99	29	26,2	cyclictest	1682301	-21	kworker/u8:1+flush-259:0	20:20:01	2
1629910	99	29	26,2	cyclictest	1941303	-21	kworker/u8:3+flush-259:0	00:15:21	1
1629910	99	29	26,2	cyclictest	1708045	-21	kworker/u8:3+flush-259:0	20:40:20	1
1629910	99	29	25,3	cyclictest	1785580	-21	kworker/u8:0+events_unbound	21:38:12	1
1629913	99	28	25,2	cyclictest	1848399	-21	kworker/u8:3+events_unbound	22:50:23	2
1629913	99	28	25,2	cyclictest	1821971	-21	kworker/u8:1+events_unbound	22:30:25	2
1629913	99	28	25,2	cyclictest	1744098	-21	kworker/u8:3+flush-259:0	21:10:21	2
1629913	99	28	24,3	cyclictest	1692582	-21	kworker/u8:0+flush-259:0	20:35:19	2
1629910	99	28	26,1	cyclictest	1931016	-21	kworker/u8:0+flush-259:0	00:30:22	1
1629910	99	28	25,2	cyclictest	1838101	-21	kworker/u8:2+flush-259:0	22:35:00	1
1629910	99	28	25,2	cyclictest	1758688	-21	kworker/u8:1+events_unbound	21:15:15	1
1629910	99	28	24,3	cyclictest	1910255	-21	apt-get	23:40:12	1
1629907	99	28	25,2	cyclictest	1879308	-21	kworker/u8:1+flush-259:0	23:15:17	0
1629907	99	28	23,4	cyclictest	1801254	-21	latency_hist	21:55:01	0
1629919	99	27	22,3	cyclictest	1651636	-21	/usr/sbin/munin	19:30:14	3
1629913	99	27	24,2	cyclictest	1888422	-21	kworker/u8:3+events_unbound	23:50:21	2
1629910	99	27	24,2	cyclictest	1692582	-21	kworker/u8:0+events_unbound	20:15:15	1
1629910	99	27	23,3	cyclictest	1888422	-21	kworker/u8:3+flush-259:0	23:25:00	1
1629910	99	27	23,3	cyclictest	1848399	-21	kworker/u8:3+events_unbound	23:02:10	1
1629910	99	27	23,3	cyclictest	1827355	-21	kworker/u8:4+events_unbound	22:21:11	1
1629910	99	27	23,3	cyclictest	1692582	-21	kworker/u8:0+events_unbound	20:30:24	1
1629907	99	27	23,3	cyclictest	1888422	-21	kworker/u8:3+flush-259:0	23:20:22	0
1629907	99	27	22,3	cyclictest	1821971	-21	kworker/u8:1+events_unbound	22:30:23	0
1629913	99	26	23,2	cyclictest	1931016	-21	kworker/u8:0+events_unbound	00:33:45	2
1629913	99	26	23,2	cyclictest	1692582	-21	kworker/u8:0+events_unbound	20:57:13	2
1629913	99	26	23,2	cyclictest	1645868	-21	kworker/u8:3+events_unbound	19:40:23	2
1629913	99	26	22,3	cyclictest	1941303	-21	kworker/u8:3+events_unbound	00:15:13	2
1629910	99	26	23,2	cyclictest	1682301	-21	kworker/u8:1+flush-259:0	20:20:24	1
1629907	99	26	21,4	cyclictest	1899949	-21	apt-get	23:30:10	0
1629919	99	25	20,4	cyclictest	1941303	-21	kworker/u8:3+flush-259:0	00:10:18	3
1629919	99	25	20,4	cyclictest	1837450	-21	latency_hist	22:30:02	3
1629919	99	25	18,4	cyclictest	509	-21	rs:main		3
1629913	99	25	23,2	cyclictest	1619532	-21	kworker/u8:1+flush-259:0	19:50:23	2
1629913	99	25	21,3	cyclictest	1708045	-21	kworker/u8:3+events_unbound	20:53:10	2
1629910	99	25	22,2	cyclictest	1925764	-21	kworker/u8:1+flush-259:0	00:05:00	1
1629910	99	25	22,2	cyclictest	1682301	-21	kworker/u8:1+flush-259:0	20:00:25	1
1629910	99	25	21,3	cyclictest	1894520	-21	kworker/u8:0+events_unbound	23:26:11	1
1629910	99	25	21,3	cyclictest	1894520	-21	kworker/u8:0+events_unbound	23:26:11	1
1629910	99	25	21,3	cyclictest	1888422	-21	kworker/u8:3+flush-259:0	23:55:21	1
1629907	99	25	22,2	cyclictest	1619532	-21	kworker/u8:1+flush-259:0	19:30:23	0
1629907	99	25	21,3	cyclictest	1931016	-21	kworker/u8:0+events_unbound	00:30:25	0
1629907	99	25	21,3	cyclictest	1843280	-21	apt-get	22:35:12	0
1629907	99	25	18,5	cyclictest	1790072	-21	ntpq	21:40:22	0
1629919	99	24	19,4	cyclictest	1936143	-21	latency_hist	00:05:00	3
1629919	99	24	19,3	cyclictest	1863883	-21	apt-get	22:55:10	3
1629913	99	24	21,2	cyclictest	1888422	-21	kworker/u8:3+events_unbound	23:55:27	2
1629913	99	24	21,2	cyclictest	1811868	-21	kworker/u8:2+events_unbound	22:05:21	2
1629913	99	24	18,4	cyclictest	252	-21	systemd-journal	22:18:10	2
1629910	99	24	23,1	cyclictest	1645868	-21	kworker/u8:3+events_unbound	19:56:12	1
1629910	99	24	21,3	cyclictest	1888422	-21	kworker/u8:3+events_unbound	23:45:22	1
1629910	99	24	21,2	cyclictest	1925764	-21	kworker/u8:1+flush-259:0	23:55:01	1
1629910	99	24	21,2	cyclictest	1821971	-21	kworker/u8:1+events_unbound	22:37:10	1
1629910	99	24	21,2	cyclictest	1785580	-21	kworker/u8:0+flush-259:0	22:40:11	1
1629910	99	24	21,2	cyclictest	1758688	-21	kworker/u8:1+events_unbound	21:13:12	1
1629910	99	24	21,2	cyclictest	1758688	-21	kworker/u8:1+events_unbound	21:13:12	1
1629907	99	24	20,3	cyclictest	1931016	-21	kworker/u8:0+flush-259:0	00:35:35	0
1629907	99	24	17,5	cyclictest	1758698	-21	ntpq	21:10:21	0
1629907	99	24	17,5	cyclictest	1758698	-21	ntpq	21:10:21	0
1629907	99	24	0,22	cyclictest	587621	-21	sshd	00:11:20	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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