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 Aug 13, 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
1426456	99	48	45,2	cyclictest	1411112	-21	kworker/u8:2+flush-259:0	19:15:11	2
1426450	99	46	42,3	cyclictest	1609193	-21	kworker/u8:3+flush-259:0	23:10:00	0
1426460	99	45	38,5	cyclictest	1545991	-21	http	21:05:01	3
1426450	99	42	37,3	cyclictest	335557	-21	systemd-journal	20:54:14	0
1426450	99	42	37,3	cyclictest	335557	-21	systemd-journal	20:54:13	0
1426456	99	38	35,2	cyclictest	1452736	-21	kworker/u8:2+flush-259:0	19:45:25	2
1426454	99	38	35,2	cyclictest	1499534	-21	kworker/u8:0+events_unbound	21:10:22	1
1426456	99	37	32,4	cyclictest	1718520	-21	apt-get	23:50:11	2
1426456	99	37	32,4	cyclictest	1551577	-21	latency_hist	21:10:01	2
1426456	99	37	31,4	cyclictest	1739411	-21	latency_hist	00:10:02	2
1426456	99	37	30,3	cyclictest	1452736	-21	kworker/u8:2+events_unbound	20:25:15	2
1426454	99	37	34,2	cyclictest	1739646	-21	kworker/u8:2+events_unbound	00:25:14	1
1426454	99	37	34,2	cyclictest	1525335	-21	kworker/u8:1+events_unbound	20:55:25	1
1426454	99	37	34,2	cyclictest	1420922	-21	kworker/u8:0+flush-259:0	19:45:16	1
1426454	99	37	34,2	cyclictest	1420922	-21	kworker/u8:0+events_unbound	19:31:44	1
1426460	99	36	31,3	cyclictest	1457399	-21	ntpq	19:35:21	3
1426456	99	36	29,5	cyclictest	1488301	-21	ntpq	20:05:20	2
1426454	99	36	33,2	cyclictest	1452736	-21	kworker/u8:2+events_unbound	19:40:13	1
1426460	99	35	32,2	cyclictest	1545986	-21	kworker/u8:2+flush-259:0	22:35:00	3
1426456	99	35	30,4	cyclictest	335557	-21	systemd-journal	22:17:28	2
1426454	99	35	33,2	cyclictest	1718283	-21	kworker/u8:3+flush-259:0	00:00:23	1
1426454	99	35	32,2	cyclictest	1545986	-21	kworker/u8:2+events_unbound	22:40:13	1
1426454	99	35	32,2	cyclictest	1420922	-21	kworker/u8:0+events_unbound	19:39:45	1
1426454	99	35	31,3	cyclictest	1494626	-21	apt-get	20:15:12	1
1426454	99	35	29,4	cyclictest	1687223	-21	latency_hist	23:20:00	1
1426454	99	34	31,2	cyclictest	1545986	-21	kworker/u8:2+events_unbound	22:45:23	1
1426450	99	34	29,3	cyclictest	1545986	-21	kworker/u8:2+flush-259:0	22:10:14	0
1426460	99	33	29,3	cyclictest	1671231	-21	kworker/u8:0+flush-259:0	23:20:15	3
1426456	99	33	29,3	cyclictest	1509818	-21	kworker/u8:3+flush-259:0	20:35:23	2
1426456	99	33	29,3	cyclictest	1499534	-21	kworker/u8:0+flush-259:0	21:20:20	2
1426454	99	33	31,2	cyclictest	1525335	-21	kworker/u8:1+events_unbound	20:45:20	1
1426454	99	33	30,2	cyclictest	1609193	-21	kworker/u8:3+flush-259:0	22:55:18	1
1426454	99	33	30,2	cyclictest	1609193	-21	kworker/u8:3+events_unbound	23:05:24	1
1426454	99	33	30,2	cyclictest	1437088	-21	kworker/u8:1+flush-259:0	19:19:54	1
1426454	99	32	30,2	cyclictest	1609193	-21	kworker/u8:3+events_unbound	23:10:13	1
1426454	99	32	29,2	cyclictest	1525335	-21	kworker/u8:1+events_unbound	20:50:10	1
1426454	99	32	29,2	cyclictest	1525335	-21	kworker/u8:1+events_unbound	20:50:10	1
1426460	99	31	28,2	cyclictest	1682269	-21	kworker/u8:1+flush-259:0	23:15:23	3
1426456	99	31	27,3	cyclictest	1545986	-21	kworker/u8:2+flush-259:0	22:20:16	2
1426454	99	31	29,2	cyclictest	1452736	-21	kworker/u8:2+flush-259:0	19:50:19	1
1426454	99	31	28,2	cyclictest	1671231	-21	kworker/u8:0+events_unbound	23:55:14	1
1426454	99	31	28,2	cyclictest	1582987	-21	kworker/u8:1+events_unbound	22:05:14	1
1426454	99	31	28,2	cyclictest	1499534	-21	kworker/u8:0+flush-259:0	20:30:19	1
1426450	99	31	26,4	cyclictest	1557368	-21	base64	21:15:01	0
1426460	99	30	23,5	cyclictest	335557	-21	systemd-journal	23:00:29	3
1426456	99	30	26,3	cyclictest	1525585	-21	apt-get	20:45:11	2
1426454	99	30	28,2	cyclictest	1545986	-21	kworker/u8:2+flush-259:0	21:05:23	1
1426454	99	30	28,2	cyclictest	1452736	-21	kworker/u8:2+events_unbound	20:40:12	1
1426454	99	30	27,2	cyclictest	1760359	-21	kworker/u8:1+flush-259:0	00:38:47	1
1426454	99	30	27,2	cyclictest	1609193	-21	kworker/u8:3+events_unbound	22:15:15	1
1426454	99	30	27,2	cyclictest	1509818	-21	kworker/u8:3+events_unbound	20:35:17	1
1426454	99	30	26,3	cyclictest	1713312	-21	kworker/u8:1+events_unbound	00:10:21	1
1426454	99	30	26,3	cyclictest	1671231	-21	kworker/u8:0+events_unbound	00:30:16	1
1426456	99	29	26,2	cyclictest	1603629	-21	kworker/u8:0+events_unbound	22:00:24	2
1426454	99	29	27,2	cyclictest	1499534	-21	kworker/u8:0+events_unbound	21:35:20	1
1426460	99	28	23,3	cyclictest	1734228	-21	latency_hist	00:05:01	3
1426456	99	28	25,2	cyclictest	1671231	-21	kworker/u8:0+events_unbound	23:30:22	2
1426456	99	28	25,2	cyclictest	1609193	-21	kworker/u8:3+flush-259:0	23:05:20	2
1426456	99	28	24,3	cyclictest	1420922	-21	kworker/u8:0+events_unbound	20:04:51	2
1426456	99	28	23,4	cyclictest	1650508	-21	latency_hist	22:45:00	2
1426454	99	28	27,1	cyclictest	1545986	-21	kworker/u8:2+events_unbound	21:48:28	1
1426454	99	28	25,2	cyclictest	1713312	-21	kworker/u8:1+events_unbound	23:45:22	1
1426454	99	28	25,2	cyclictest	1545986	-21	kworker/u8:2+events_unbound	23:00:14	1
1426454	99	28	25,2	cyclictest	1545986	-21	kworker/u8:2+events_unbound	22:25:22	1
1426454	99	28	25,2	cyclictest	1499534	-21	kworker/u8:0+events_unbound	21:40:22	1
1426454	99	28	24,3	cyclictest	1545999	-21	gpgv	21:04:59	1
1426454	99	28	24,3	cyclictest	1443047	-21	apt-get	19:25:12	1
1426450	99	28	24,3	cyclictest	1420922	-21	kworker/u8:0+flush-259:0	19:10:23	0
1426460	99	27	23,3	cyclictest	1671231	-21	kworker/u8:0+flush-259:0	23:05:16	3
1426456	99	27	23,3	cyclictest	1687481	-21	apt-get	23:20:13	2
1426456	99	27	22,3	cyclictest	1671231	-21	kworker/u8:0+flush-259:0	00:00:17	2
1426454	99	27	25,2	cyclictest	1609193	-21	kworker/u8:3+events_unbound	23:35:16	1
1426454	99	27	24,2	cyclictest	1671231	-21	kworker/u8:0+flush-259:0	00:05:23	1
1426454	99	27	24,2	cyclictest	1671231	-21	kworker/u8:0+events_unbound	23:40:43	1
1426454	99	27	24,2	cyclictest	1420922	-21	kworker/u8:0+flush-259:0	20:00:24	1
1426454	99	27	24,2	cyclictest	1420922	-21	kworker/u8:0+events_unbound	19:55:01	1
1426450	99	27	21,4	cyclictest	1489203	-21	latency_hist	20:10:00	0
1426450	99	27	20,5	cyclictest	1727777	-21	ntpq	23:55:22	0
1426460	99	26	22,3	cyclictest	1609193	-21	kworker/u8:3+flush-259:0	22:55:16	3
1426460	99	26	22,3	cyclictest	1499534	-21	kworker/u8:0+flush-259:0	20:50:24	3
1426460	99	26	22,3	cyclictest	1499534	-21	kworker/u8:0+flush-259:0	20:50:24	3
1426460	99	26	22,3	cyclictest	1499534	-21	kworker/u8:0+flush-259:0	20:30:16	3
1426460	99	26	21,3	cyclictest	1567741	-21	/usr/sbin/munin	21:25:21	3
1426460	99	26	20,4	cyclictest	1644414	-21	ntpq	22:35:19	3
1426456	99	26	24,2	cyclictest	1671231	-21	kworker/u8:0+flush-259:0	23:15:15	2
1426456	99	26	23,2	cyclictest	1671231	-21	kworker/u8:0+flush-259:0	00:25:00	2
1426456	99	26	22,3	cyclictest	1707503	-21	kworker/u8:4+flush-259:0	23:40:20	2
1426456	99	26	22,3	cyclictest	1609193	-21	kworker/u8:3+events_unbound	22:53:29	2
1426456	99	26	22,3	cyclictest	1545986	-21	kworker/u8:2+flush-259:0	22:30:17	2
1426456	99	26	22,3	cyclictest	1525335	-21	kworker/u8:1+flush-259:0	20:50:16	2
1426456	99	26	22,3	cyclictest	1525335	-21	kworker/u8:1+flush-259:0	20:50:16	2
1426456	99	26	22,3	cyclictest	1499534	-21	kworker/u8:0+events_unbound	21:41:29	2
1426454	99	26	23,2	cyclictest	1671231	-21	kworker/u8:0+flush-259:0	00:15:26	1
1426454	99	26	23,2	cyclictest	1671231	-21	kworker/u8:0+events_unbound	23:21:31	1
1426454	99	26	22,3	cyclictest	1603629	-21	kworker/u8:0+events_unbound	22:00:14	1
1426460	99	25	20,4	cyclictest	335557	-21	systemd-journal	22:30:00	3
1426460	99	25	18,5	cyclictest	335557	-21	systemd-journal	00:35:01	3
1426456	99	25	22,3	cyclictest	1582987	-21	kworker/u8:1+events_unbound	22:14:29	2
1426456	99	25	22,2	cyclictest	1754648	-21	kworker/u8:3+flush-259:0	00:35:18	2
1426456	99	25	22,2	cyclictest	1671231	-21	kworker/u8:0+events_unbound	23:57:31	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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