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 May 21, 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
1575425	99	45	34,8	cyclictest	1674781	-21	latency_hist	20:45:01	1
1575433	99	39	37,1	cyclictest	1757865	-21	fwupd	22:00:47	3
1575421	99	37	30,5	cyclictest	335557	-21	systemd-journal	23:05:00	0
1575430	99	35	30,3	cyclictest	335557	-21	systemd-journal	20:01:08	2
1575430	99	35	1,33	cyclictest	1643406	-21	true	20:15:00	2
1575430	99	35	1,33	cyclictest	1643406	-21	true	20:15:00	2
1575425	99	34	28,4	cyclictest	335557	-21	systemd-journal	22:00:46	1
1575430	99	33	29,3	cyclictest	1515413	-21	kworker/u8:1+flush-259:0	19:15:16	2
1575421	99	33	29,2	cyclictest	1626885	-21	kworker/u8:3+flush-259:0	20:05:24	0
1575430	99	32	28,3	cyclictest	1841014	-21	kworker/u8:0+flush-259:0	23:35:15	2
1575425	99	32	28,3	cyclictest	1536687	-21	kworker/u8:4+flush-259:0	19:20:17	1
1575425	99	32	25,5	cyclictest	335557	-21	systemd-journal	20:52:09	1
1575421	99	32	28,3	cyclictest	335557	-21	systemd-journal	23:46:09	0
1575421	99	32	28,3	cyclictest	1840955	-21	apt-get	23:25:00	0
1575433	99	30	25,4	cyclictest	335557	-21	systemd-journal	19:52:10	3
1575430	99	30	26,3	cyclictest	1542690	-21	kworker/u8:2+flush-259:0	19:40:25	2
1575430	99	30	25,4	cyclictest	335557	-21	systemd-journal	20:26:09	2
1575425	99	30	25,4	cyclictest	1825425	-21	kworker/u8:0+flush-259:0	23:15:18	1
1575425	99	30	25,3	cyclictest	1654354	-21	/usr/sbin/munin	20:25:14	1
1575430	99	29	21,6	cyclictest	335557	-21	systemd-journal	22:05:00	2
1575430	99	29	21,6	cyclictest	1626885	-21	kworker/u8:3+flush-259:0	20:40:31	2
1575421	99	29	23,4	cyclictest	509	-21	rs:main		0
1575430	99	28	22,4	cyclictest	1753070	-21	latency_hist	22:00:01	2
1575425	99	28	21,5	cyclictest	335557	-21	systemd-journal	19:30:01	1
1575421	99	28	24,3	cyclictest	1841014	-21	kworker/u8:0+events_unbound	23:33:11	0
1575421	99	28	1,25	cyclictest	1	-21	systemd	19:44:08	0
1575433	99	27	21,5	cyclictest	335557	-21	systemd-journal	22:50:00	3
1575430	99	27	22,3	cyclictest	335557	-21	systemd-journal	21:10:10	2
1575425	99	27	22,3	cyclictest	1836066	-21	apt-get	23:20:11	1
1575421	99	27	23,3	cyclictest	1542690	-21	kworker/u8:2+events_unbound	19:30:09	0
1575421	99	27	21,4	cyclictest	335557	-21	systemd-journal	19:17:08	0
1575433	99	26	21,3	cyclictest	1815585	-21	diskstats	23:00:14	3
1575433	99	26	18,6	cyclictest	1768575	-21	latency_hist	22:15:00	3
1575425	99	26	20,4	cyclictest	1877509	-21	cp	00:00:00	1
1575421	99	26	22,3	cyclictest	1882359	-21	kworker/u8:4+events_unbound	00:37:08	0
1575421	99	26	22,3	cyclictest	1669851	-21	kworker/u8:0+events_unbound	21:19:10	0
1575430	99	25	18,5	cyclictest	1846544	-21	latency_hist	23:30:01	2
1575425	99	25	19,4	cyclictest	509	-21	rs:main		1
1575421	99	25	20,4	cyclictest	1542690	-21	kworker/u8:2+events_unbound	19:35:11	0
1575421	99	25	20,3	cyclictest	1696005	-21	kworker/u8:1+flush-259:0	21:55:23	0
1575421	99	25	18,5	cyclictest	1784110	-21	latency_hist	22:30:00	0
1575421	99	25	1,22	cyclictest	335557	-21	systemd-journal	00:00:49	0
1575433	99	24	18,4	cyclictest	1784349	-21	/usr/sbin/munin	22:30:14	3
1575430	99	24	19,3	cyclictest	1617170	-21	base64	19:50:01	2
1575430	99	24	18,4	cyclictest	335557	-21	systemd-journal	21:15:38	2
1575425	99	24	20,3	cyclictest	1888143	-21	/usr/sbin/munin	00:10:12	1
1575425	99	24	18,4	cyclictest	335557	-21	systemd-journal	21:42:09	1
1575425	99	24	15,8	cyclictest	1784112	-21	latency_hist	22:30:00	1
1575421	99	24	21,2	cyclictest	1542690	-21	kworker/u8:2+flush-259:0	20:05:00	0
1575421	99	24	20,3	cyclictest	1626885	-21	kworker/u8:3+events_unbound	20:40:28	0
1575421	99	24	19,4	cyclictest	1841014	-21	kworker/u8:0+events_unbound	00:20:12	0
1575421	99	24	19,4	cyclictest	1542690	-21	kworker/u8:2+events_unbound	19:45:18	0
1575421	99	24	19,3	cyclictest	1835551	-21	kworker/u8:1+events_unbound	00:00:01	0
1575421	99	24	18,5	cyclictest	335557	-21	systemd-journal	23:14:09	0
1575433	99	23	19,3	cyclictest	1841014	-21	kworker/u8:0+flush-259:0	00:15:15	3
1575433	99	23	19,3	cyclictest	1626885	-21	kworker/u8:3+events_unbound	20:05:15	3
1575433	99	23	18,4	cyclictest	1626885	-21	kworker/u8:3+events_unbound	20:00:18	3
1575430	99	23	17,5	cyclictest	1877968	-21	diskstats	00:00:14	2
1575425	99	23	17,5	cyclictest	1918022	-21	ntpq	00:35:21	1
1575421	99	23	20,2	cyclictest	1696005	-21	kworker/u8:1+flush-259:0	22:05:19	0
1575421	99	23	19,3	cyclictest	1712244	-21	kworker/u8:5+events_unbound	21:32:10	0
1575421	99	23	19,3	cyclictest	1696005	-21	kworker/u8:1+flush-259:0	21:05:21	0
1575421	99	23	19,3	cyclictest	1626886	-21	kworker/u8:4+events_unbound	19:55:26	0
1575421	99	23	19,3	cyclictest	1536687	-21	kworker/u8:4+events_unbound	19:10:17	0
1575421	99	23	17,4	cyclictest	335557	-21	systemd-journal	23:30:00	0
1575433	99	22	18,3	cyclictest	1773750	-21	kworker/u8:1+events_unbound	22:20:15	3
1575433	99	22	18,3	cyclictest	1680155	-21	kworker/u8:4+flush-259:0	21:10:18	3
1575433	99	22	15,5	cyclictest	1747916	-21	latency_hist	21:55:01	3
1575430	99	22	18,3	cyclictest	1732685	-21	kworker/u8:2+flush-259:0	21:40:14	2
1575430	99	22	18,2	cyclictest	1669851	-21	kworker/u8:0-ext4-rsv-conversion	21:05:00	2
1575425	99	22	16,4	cyclictest	1898497	-21	/usr/sbin/munin	00:20:18	1
1575421	99	22	19,2	cyclictest	1659529	-21	kworker/u8:1+events_unbound	20:30:22	0
1575421	99	22	18,3	cyclictest	1669851	-21	kworker/u8:0+flush-259:0	21:01:39	0
1575421	99	22	18,3	cyclictest	1669851	-21	kworker/u8:0+events_unbound	20:59:11	0
1575421	99	22	17,4	cyclictest	1841014	-21	kworker/u8:0+events_unbound	23:36:09	0
1575421	99	22	17,4	cyclictest	1732685	-21	kworker/u8:2+flush-259:0	21:55:01	0
1575421	99	22	16,3	cyclictest	335557	-21	systemd-journal	20:30:00	0
1575433	99	21	17,3	cyclictest	1815384	-21	kworker/u8:2+events_unbound	23:10:24	3
1575433	99	21	17,3	cyclictest	1752270	-21	kworker/u8:3+flush-259:0	22:35:16	3
1575433	99	21	17,3	cyclictest	1626885	-21	kworker/u8:3+flush-259:0	20:20:16	3
1575433	99	21	15,4	cyclictest	509	-21	rs:main		3
1575425	99	21	8,11	cyclictest	1664804	-21	cpuspeed_turbos	20:35:13	1
1575421	99	21	18,2	cyclictest	1778921	-21	kworker/u8:4+flush-259:0	22:50:00	0
1575421	99	21	18,2	cyclictest	1752270	-21	kworker/u8:3+flush-259:0	23:05:22	0
1575421	99	21	17,3	cyclictest	1835551	-21	kworker/u8:1+events_unbound	00:10:13	0
1575421	99	21	17,3	cyclictest	1752270	-21	kworker/u8:3+events_unbound	22:36:11	0
1575421	99	21	17,3	cyclictest	1696005	-21	kworker/u8:1+events_unbound	22:00:22	0
1575421	99	21	15,4	cyclictest	1685126	-21	latency_hist	20:55:01	0
1575433	99	20	17,2	cyclictest	1542690	-21	kworker/u8:2+events_unbound	19:40:15	3
1575433	99	20	16,3	cyclictest	1542690	-21	kworker/u8:2+events_unbound	20:15:18	3
1575433	99	20	16,3	cyclictest	1536687	-21	kworker/u8:4+flush-259:0	19:30:16	3
1575433	99	20	14,4	cyclictest	1717194	-21	/usr/sbin/munin	21:25:14	3
1575433	99	20	13,5	cyclictest	1856821	-21	latency_hist	23:40:01	3
1575430	99	20	18,2	cyclictest	1882359	-21	kworker/u8:4+flush-259:0	00:35:20	2
1575430	99	20	16,3	cyclictest	1752270	-21	kworker/u8:3+flush-259:0	22:35:14	2
1575430	99	20	16,3	cyclictest	1626885	-21	kworker/u8:3+flush-259:0	20:05:21	2
1575430	99	20	16,2	cyclictest	1722141	-21	turbostat.cron	21:30:00	2
1575430	99	20	15,4	cyclictest	1542690	-21	kworker/u8:2+events_unbound	19:55:19	2
1575430	99	20	13,5	cyclictest	1867114	-21	latency_hist	23:50:01	2
1575430	99	20	13,5	cyclictest	1668716	-21	ntpq	20:35:20	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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