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 Thu Nov 20, 2025 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1712673	99	39	35,3	cyclictest	1837521	-21	kworker/u8:3+flush-259:0	09:45:21	2
1712673	99	39	35,3	cyclictest	1837521	-21	kworker/u8:3+flush-259:0	09:45:20	2
1712669	99	39	33,4	cyclictest	2698871	-21	systemd-journal	10:40:00	1
1712669	99	38	31,5	cyclictest	1791010	-21	latency_hist	08:25:01	1
1712677	99	37	33,3	cyclictest	1780749	-21	kworker/u8:0+flush-259:0	09:25:00	3
1712673	99	37	34,2	cyclictest	1654334	-21	kworker/u8:3+flush-259:0	07:40:19	2
1712677	99	33	27,4	cyclictest	2698871	-21	systemd-journal	11:24:59	3
1712673	99	32	29,2	cyclictest	1682306	-21	kworker/u8:4+flush-259:0	07:30:24	2
1712673	99	32	28,3	cyclictest	2009341	-21	kworker/u8:1+flush-259:0	12:05:21	2
1712673	99	32	28,3	cyclictest	1728477	-21	kworker/u8:0+flush-259:0	07:50:15	2
1712673	99	32	26,4	cyclictest	1743891	-21	latency_hist	07:40:00	2
1712673	99	30	26,3	cyclictest	1946304	-21	kworker/u8:1+flush-259:0	11:05:20	2
1712673	99	29	22,5	cyclictest	1822030	-21	latency_hist	08:55:01	2
1712666	99	29	26,2	cyclictest	1883580	-21	kworker/u8:0+flush-259:0	10:00:00	0
1712673	99	28	24,3	cyclictest	1993502	-21	kworker/u8:3+events_unbound	12:15:01	2
1712673	99	28	24,3	cyclictest	1780749	-21	kworker/u8:0+events_unbound	09:10:13	2
1712673	99	28	22,4	cyclictest	1925101	-21	ntpq	10:30:22	2
1712669	99	28	24,2	cyclictest	1837521	-21	kworker/u8:3+flush-259:0	09:50:18	1
1712669	99	28	24,2	cyclictest	1837521	-21	kworker/u8:3+flush-259:0	09:50:17	1
1712673	99	27	24,2	cyclictest	1827437	-21	kworker/u8:1+flush-259:0	09:30:20	2
1712669	99	27	23,3	cyclictest	1926541	-21	kworker/u8:0+flush-259:0	10:55:00	1
1712669	99	27	22,3	cyclictest	1827437	-21	kworker/u8:1+flush-259:0	09:30:00	1
1712666	99	27	23,3	cyclictest	1858158	-21	latency_hist	09:30:00	0
1712673	99	26	22,3	cyclictest	1883580	-21	kworker/u8:0+events_unbound	09:55:24	2
1712673	99	26	22,3	cyclictest	1827437	-21	kworker/u8:1+events_unbound	09:25:18	2
1712669	99	26	22,3	cyclictest	1946304	-21	kworker/u8:1+flush-259:0	11:10:15	1
1712666	99	26	21,3	cyclictest	2045417	-21	/usr/sbin/munin	12:30:15	0
1712673	99	25	22,2	cyclictest	2019432	-21	kworker/u8:0+flush-259:0	12:10:24	2
1712673	99	25	21,3	cyclictest	1926541	-21	kworker/u8:0+events_unbound	10:55:19	2
1712673	99	25	19,4	cyclictest	2004210	-21	/usr/sbin/munin	11:50:16	2
1712673	99	25	19,4	cyclictest	1832351	-21	latency_hist	09:05:01	2
1712669	99	25	19,4	cyclictest	1780749	-21	kworker/u8:0+flush-259:0	08:30:17	1
1712666	99	25	22,2	cyclictest	1780749	-21	kworker/u8:0+flush-259:0	09:20:24	0
1712673	99	24	21,2	cyclictest	1998719	-21	kworker/u8:2+events_unbound	11:45:17	2
1712673	99	24	21,2	cyclictest	1654334	-21	kworker/u8:3+flush-259:0	07:25:00	2
1712673	99	24	20,2	cyclictest	1837521	-21	kworker/u8:3+events_unbound	09:39:39	2
1712669	99	24	19,3	cyclictest	1905153	-21	cp	10:15:07	1
1712677	99	23	19,3	cyclictest	1915656	-21	gpgv	10:25:01	3
1712673	99	23	20,2	cyclictest	1837521	-21	kworker/u8:3+events_unbound	10:25:23	2
1712669	99	23	19,3	cyclictest	2019432	-21	kworker/u8:0+events_unbound	12:05:01	1
1712669	99	23	18,4	cyclictest	3000063	-21	rs:main		1
1712666	99	23	19,3	cyclictest	2698871	-21	systemd-journal	09:45:28	0
1712666	99	23	19,3	cyclictest	2698871	-21	systemd-journal	09:45:27	0
1712673	99	22	19,2	cyclictest	1951524	-21	kworker/u8:3+events_unbound	11:13:41	2
1712673	99	22	19,2	cyclictest	1780749	-21	kworker/u8:0+flush-259:0	08:30:22	2
1712673	99	22	19,2	cyclictest	1763990	-21	kworker/u8:1+flush-259:0	08:40:18	2
1712673	99	22	18,3	cyclictest	2019432	-21	kworker/u8:0+flush-259:0	12:30:21	2
1712673	99	22	18,3	cyclictest	1926541	-21	kworker/u8:0+flush-259:0	10:35:18	2
1712669	99	22	17,4	cyclictest	1972683	-21	apt-get	11:20:00	1
1712677	99	21	17,3	cyclictest	2698871	-21	systemd-journal	07:50:00	3
1712677	99	21	16,4	cyclictest	1893339	-21	ntpq	10:00:20	3
1712673	99	21	19,1	cyclictest	1888750	-21	kworker/u8:2+flush-259:0	10:00:15	2
1712673	99	21	18,2	cyclictest	1743909	-21	kworker/u8:1+events_unbound	07:45:23	2
1712673	99	21	17,3	cyclictest	1993502	-21	kworker/u8:3+flush-259:0	12:04:59	2
1712673	99	21	16,3	cyclictest	2698871	-21	systemd-journal	08:00:36	2
1712669	99	21	17,3	cyclictest	1993502	-21	kworker/u8:3+flush-259:0	12:35:23	1
1712669	99	21	17,3	cyclictest	1904561	-21	kworker/u8:1+flush-259:0	10:30:25	1
1712669	99	21	17,3	cyclictest	1837521	-21	kworker/u8:3+events_unbound	09:35:22	1
1712669	99	21	17,3	cyclictest	1780749	-21	kworker/u8:0+flush-259:0	08:50:18	1
1712669	99	21	17,3	cyclictest	1770137	-21	base64	08:05:01	1
1712669	99	21	16,4	cyclictest	1654334	-21	kworker/u8:3+flush-259:0	07:55:14	1
1712669	99	21	16,3	cyclictest	1780997	-21	apt-get	08:15:15	1
1712666	99	21	18,2	cyclictest	2019432	-21	kworker/u8:0+flush-259:0	12:10:16	0
1712666	99	21	16,4	cyclictest	2039105	-21	ntpq	12:20:20	0
1712677	99	20	18,1	cyclictest	0	-21	swapper/3	10:35:00	3
1712677	99	20	14,4	cyclictest	2003968	-21	latency_hist	11:50:01	3
1712673	99	20	17,2	cyclictest	1946304	-21	kworker/u8:1+events_unbound	11:35:22	2
1712673	99	20	17,2	cyclictest	1888750	-21	kworker/u8:2+events_unbound	10:07:40	2
1712673	99	20	17,2	cyclictest	1654334	-21	kworker/u8:3+events_unbound	07:15:17	2
1712673	99	20	16,3	cyclictest	1957302	-21	kworker/u8:0+flush-259:0	11:40:17	2
1712673	99	20	16,3	cyclictest	1926541	-21	kworker/u8:0+events_unbound	10:50:19	2
1712673	99	20	16,3	cyclictest	1837480	-21	sh	09:09:59	2
1712673	99	20	14,4	cyclictest	2698871	-21	systemd-journal	08:39:37	2
1712673	99	20	13,5	cyclictest	1940567	-21	ntpq	10:45:21	2
1712669	99	20	16,3	cyclictest	2040277	-21	apt-get	12:25:09	1
1712669	99	20	16,3	cyclictest	1821904	-21	kworker/u8:2+events_unbound	09:00:15	1
1712666	99	20	17,2	cyclictest	1780749	-21	kworker/u8:0+flush-259:0	08:50:17	0
1712677	99	19	16,2	cyclictest	1837521	-21	kworker/u8:3+flush-259:0	09:15:25	3
1712673	99	19	16,2	cyclictest	1957302	-21	kworker/u8:0+flush-259:0	11:20:24	2
1712673	99	19	16,2	cyclictest	1753682	-21	kworker/u8:2+events_unbound	08:18:37	2
1712673	99	19	15,3	cyclictest	1946304	-21	kworker/u8:1+events_unbound	11:25:17	2
1712673	99	19	15,3	cyclictest	1712874	-21	apt-get	07:10:12	2
1712673	99	19	15,3	cyclictest	1712874	-21	apt-get	07:10:12	2
1712673	99	19	15,3	cyclictest	1682306	-21	kworker/u8:4+events_unbound	07:25:21	2
1712673	99	19	15,3	cyclictest	1682306	-21	kworker/u8:4+events_unbound	07:25:20	2
1712669	99	19	16,2	cyclictest	1654334	-21	kworker/u8:3+flush-259:0	07:15:16	1
1712669	99	19	15,3	cyclictest	1888750	-21	kworker/u8:2+flush-259:0	10:05:21	1
1712669	99	19	15,3	cyclictest	1827437	-21	kworker/u8:1+flush-259:0	09:20:30	1
1712669	99	19	15,3	cyclictest	1780749	-21	kworker/u8:0+events_unbound	09:05:13	1
1712669	99	19	15,2	cyclictest	1946304	-21	kworker/u8:1+flush-259:0	11:30:20	1
1712669	99	19	13,4	cyclictest	1733621	-21	latency_hist	07:30:00	1
1712669	99	19	13,4	cyclictest	1733621	-21	latency_hist	07:30:00	1
1712669	99	19	12,5	cyclictest	1764725	-21	/usr/sbin/munin	08:00:14	1
1712666	99	19	16,2	cyclictest	1837521	-21	kworker/u8:3+flush-259:0	09:35:21	0
1712666	99	19	15,3	cyclictest	1780749	-21	kworker/u8:0+flush-259:0	08:20:26	0
1712666	99	19	12,5	cyclictest	1769806	-21	cp	08:05:01	0
1712677	99	18	16,1	cyclictest	0	-21	swapper/3	11:00:00	3
1712677	99	18	15,2	cyclictest	1780749	-21	kworker/u8:0+flush-259:0	09:35:00	3
1712677	99	18	14,3	cyclictest	1993502	-21	kworker/u8:3+flush-259:0	12:20:16	3
1712673	99	18	15,2	cyclictest	1998719	-21	kworker/u8:2+flush-259:0	11:55:26	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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