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 Mar 05, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1831656	99	40	36,3	cyclictest	2008635	-21	kworker/u8:0+events_unbound	10:15:14	1
1831656	99	37	34,2	cyclictest	1962056	-21	kworker/u8:1+flush-259:0	09:50:26	1
1831656	99	37	33,2	cyclictest	1821467	-21	kworker/u8:2+events_unbound	08:30:21	1
1831656	99	36	32,3	cyclictest	2128476	-21	kworker/u8:1+events_unbound	12:25:14	1
1831656	99	33	30,2	cyclictest	1962056	-21	kworker/u8:1+events_unbound	10:10:14	1
1831663	99	32	29,2	cyclictest	1904763	-21	fwupd	08:18:20	3
1831656	99	32	29,2	cyclictest	2008635	-21	kworker/u8:0+events_unbound	10:00:14	1
1831656	99	30	27,2	cyclictest	2128476	-21	kworker/u8:1+events_unbound	12:00:20	1
1831656	99	30	27,2	cyclictest	1873591	-21	kworker/u8:0+events_unbound	08:00:27	1
1831656	99	29	26,2	cyclictest	1962056	-21	kworker/u8:1+events_unbound	09:30:14	1
1831656	99	29	24,2	cyclictest	1811002	-21	kworker/u8:1+events_unbound	07:10:28	1
1831656	99	28	25,2	cyclictest	2061477	-21	kworker/u8:4+events_unbound	10:50:15	1
1831656	99	28	24,3	cyclictest	2149027	-21	/usr/sbin/munin	12:15:13	1
1831656	99	28	21,5	cyclictest	1956885	-21	latency_hist	09:10:00	1
1831656	99	27	22,3	cyclictest	1831573	-21	latency_hist	07:10:01	1
1831656	99	27	21,3	cyclictest	1909031	-21	kworker/u8:3+events_unbound	08:20:24	1
1831653	99	27	23,2	cyclictest	2040201	-21	kworker/u8:2+flush-259:0	11:00:00	0
1831653	99	27	17,9	cyclictest	503	-21	tpm2-abrmd	08:30:00	0
1831663	99	26	21,3	cyclictest	2128476	-21	kworker/u8:1+flush-259:0	12:25:18	3
1831660	99	26	13,4	cyclictest	2023900	-21	ntpq	10:10:22	2
1831656	99	26	23,2	cyclictest	2128476	-21	kworker/u8:1+events_unbound	12:20:26	1
1831656	99	26	23,2	cyclictest	1962056	-21	kworker/u8:1+events_unbound	09:20:24	1
1831656	99	26	21,2	cyclictest	2061477	-21	kworker/u8:4+events_unbound	11:05:38	1
1831653	99	26	22,3	cyclictest	2169127	-21	kworker/u8:3+flush-259:0	12:40:00	0
1831653	99	26	22,3	cyclictest	2025003	-21	apt-get	10:15:12	0
1831663	99	25	22,2	cyclictest	2143892	-21	apt-get	12:10:10	3
1831663	99	25	21,3	cyclictest	1936505	-21	apt-get	08:50:12	3
1831660	99	25	19,4	cyclictest	1926222	-21	apt-get	08:40:11	2
1831660	99	25	19,4	cyclictest	1857909	-21	kworker/u8:3+flush-259:0	07:55:12	2
1831656	99	25	22,2	cyclictest	1941419	-21	kworker/u8:3+events_unbound	09:10:24	1
1831656	99	25	22,2	cyclictest	1821467	-21	kworker/u8:2+events_unbound	08:45:28	1
1831653	99	25	22,2	cyclictest	2061477	-21	kworker/u8:4+flush-259:0	11:40:00	0
1831653	99	25	22,2	cyclictest	2061477	-21	kworker/u8:4+flush-259:0	11:40:00	0
1831653	99	25	20,4	cyclictest	2128476	-21	kworker/u8:1+flush-259:0	12:20:24	0
1831663	99	24	19,3	cyclictest	2082103	-21	/usr/sbin/munin	11:10:14	3
1831660	99	24	18,4	cyclictest	2008635	-21	kworker/u8:0+flush-259:0	10:00:17	2
1831660	99	24	18,4	cyclictest	1842514	-21	/usr/sbin/munin	07:20:12	2
1831656	99	24	21,3	cyclictest	1951557	-21	kworker/u8:0+events_unbound	09:40:20	1
1831656	99	24	21,2	cyclictest	2061477	-21	kworker/u8:4+events_unbound	11:17:36	1
1831656	99	24	20,3	cyclictest	1821467	-21	kworker/u8:2+events_unbound	07:35:13	1
1831653	99	24	20,3	cyclictest	2008635	-21	kworker/u8:0+flush-259:0	10:20:20	0
1831653	99	24	19,3	cyclictest	1962056	-21	kworker/u8:1+flush-259:0	10:10:15	0
1831653	99	24	1,22	cyclictest	1	-21	systemd	10:36:38	0
1831663	99	23	20,2	cyclictest	1811002	-21	kworker/u8:1+flush-259:0	07:15:23	3
1831656	99	23	20,2	cyclictest	2061477	-21	kworker/u8:4+events_unbound	11:50:18	1
1831656	99	23	19,3	cyclictest	2008635	-21	kworker/u8:0+events_unbound	10:20:21	1
1831653	99	23	0,22	cyclictest	509	-21	rs:main		0
1831656	99	22	19,2	cyclictest	2071471	-21	kworker/u8:0+events_unbound	11:20:26	1
1831656	99	22	19,2	cyclictest	2061477	-21	kworker/u8:4+events_unbound	11:25:14	1
1831656	99	22	19,2	cyclictest	1821467	-21	kworker/u8:2+events_unbound	08:27:39	1
1831656	99	22	18,3	cyclictest	2008635	-21	kworker/u8:0+events_unbound	10:37:39	1
1831656	99	22	16,4	cyclictest	2082130	-21	apt-get	11:10:11	1
1831656	99	22	15,5	cyclictest	1868622	-21	/usr/sbin/munin	07:45:12	1
1831653	99	22	19,2	cyclictest	2008635	-21	kworker/u8:0+flush-259:0	10:00:23	0
1831653	99	22	18,3	cyclictest	1821467	-21	kworker/u8:2+flush-259:0	07:45:23	0
1831653	99	22	17,4	cyclictest	2040201	-21	kworker/u8:2+events_unbound	10:45:21	0
1831653	99	22	17,4	cyclictest	1909031	-21	kworker/u8:3+events_unbound	08:30:15	0
1831656	99	21	18,2	cyclictest	2061477	-21	kworker/u8:4+events_unbound	12:07:38	1
1831656	99	21	18,2	cyclictest	1909031	-21	kworker/u8:3+events_unbound	08:43:39	1
1831656	99	21	18,2	cyclictest	1883730	-21	kworker/u8:1+events_unbound	08:07:38	1
1831656	99	21	18,2	cyclictest	1857909	-21	kworker/u8:3+events_unbound	07:55:25	1
1831656	99	21	18,2	cyclictest	1811002	-21	kworker/u8:1+events_unbound	07:23:29	1
1831656	99	21	16,4	cyclictest	1857885	-21	gpgv	07:35:00	1
1831656	99	21	13,2	cyclictest	32	-21	ksoftirqd/1	10:35:01	1
1831653	99	21	17,3	cyclictest	2071851	-21	apt-get	11:00:10	0
1831653	99	21	15,4	cyclictest	2087449	-21	diskstats	11:15:13	0
1831653	99	21	15,4	cyclictest	1	-21	systemd	08:17:37	0
1831663	99	20	15,4	cyclictest	252	-21	systemd-journal	08:40:00	3
1831663	99	20	14,4	cyclictest	509	-21	rs:main		3
1831656	99	20	17,2	cyclictest	2123102	-21	kworker/u8:2+events_unbound	12:31:37	1
1831656	99	20	17,2	cyclictest	2008635	-21	kworker/u8:0+events_unbound	10:05:14	1
1831656	99	20	17,2	cyclictest	1931048	-21	kworker/u8:1+events_unbound	08:53:37	1
1831656	99	20	17,2	cyclictest	1873591	-21	kworker/u8:0+events_unbound	07:50:26	1
1831656	99	20	16,3	cyclictest	1951557	-21	kworker/u8:0+events_unbound	09:26:40	1
1831656	99	20	14,4	cyclictest	2174569	-21	latency_hist	12:40:01	1
1831653	99	20	17,2	cyclictest	1962056	-21	kworker/u8:1+flush-259:0	09:50:25	0
1831653	99	20	17,2	cyclictest	1821467	-21	kworker/u8:2+events_unbound	07:25:23	0
1831653	99	20	14,4	cyclictest	252	-21	systemd-journal	11:07:36	0
1831663	99	19	15,3	cyclictest	252	-21	systemd-journal	12:00:51	3
1831663	99	19	14,3	cyclictest	252	-21	systemd-journal	08:04:55	3
1831660	99	19	16,2	cyclictest	2076706	-21	cron	11:05:00	2
1831660	99	19	14,3	cyclictest	2071471	-21	kworker/u8:0+flush-259:0	11:20:22	2
1831660	99	19	13,4	cyclictest	252	-21	systemd-journal	08:59:59	2
1831656	99	19	17,2	cyclictest	1951557	-21	kworker/u8:0+events_unbound	09:19:38	1
1831656	99	19	16,2	cyclictest	2123102	-21	kworker/u8:2+events_unbound	12:10:17	1
1831656	99	19	16,2	cyclictest	2071471	-21	kworker/u8:0+flush-259:0	11:34:56	1
1831656	99	19	16,2	cyclictest	1951557	-21	kworker/u8:0+events_unbound	09:45:15	1
1831656	99	19	16,2	cyclictest	1931048	-21	kworker/u8:1+events_unbound	08:55:13	1
1831656	99	19	16,2	cyclictest	1821467	-21	kworker/u8:2+events_unbound	09:01:09	1
1831653	99	19	15,3	cyclictest	1951557	-21	kworker/u8:0+events_unbound	09:05:14	0
1831653	99	19	15,3	cyclictest	1857909	-21	kworker/u8:3+flush-259:0	07:55:15	0
1831653	99	19	12,5	cyclictest	2143627	-21	latency_hist	12:10:01	0
1831663	99	18	14,3	cyclictest	1821467	-21	kworker/u8:2+flush-259:0	07:50:00	3
1831663	99	18	13,4	cyclictest	2009076	-21	/usr/sbin/munin	10:00:16	3
1831663	99	18	12,4	cyclictest	2154379	-21	diskstats	12:20:13	3
1831660	99	18	11,5	cyclictest	1852568	-21	latency_hist	07:30:01	2
1831656	99	18	15,2	cyclictest	1962056	-21	kworker/u8:1+events_unbound	09:56:05	1
1831656	99	18	15,2	cyclictest	1951557	-21	kworker/u8:0+events_unbound	09:37:39	1
1831656	99	18	15,2	cyclictest	1883730	-21	kworker/u8:1+events_unbound	08:10:02	1
1831656	99	18	15,2	cyclictest	1847456	-21	kworker/u8:0+events_unbound	07:28:26	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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