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 Sat Jun 20, 2026 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1257170	99	55	50,3	cyclictest	1360761	-21	kworker/u8:2+events_unbound	21:05:01	0
1257183	99	54	46,5	cyclictest	1444185	-21	latency_hist	22:10:01	3
1257183	99	54	46,5	cyclictest	1444185	-21	latency_hist	22:10:00	3
1257170	99	50	46,2	cyclictest	1433818	-21	kworker/u8:3+events_unbound	22:30:19	0
1257176	99	49	43,4	cyclictest	1350756	-21	latency_hist	20:40:01	2
1257183	99	48	41,5	cyclictest	335557	-21	systemd-journal	00:30:01	3
1257183	99	48	41,5	cyclictest	335557	-21	systemd-journal	00:30:00	3
1257183	99	47	42,4	cyclictest	1381633	-21	gpgv	21:10:01	3
1257173	99	47	42,4	cyclictest	1407874	-21	cp	21:35:00	1
1257176	99	43	37,4	cyclictest	1267811	-21	latency_hist	19:20:00	2
1257170	99	43	40,2	cyclictest	1429057	-21	apt-get	21:55:11	0
1257176	99	41	35,4	cyclictest	1262227	-21	apt-get	19:15:01	2
1257170	99	41	37,3	cyclictest	1350795	-21	kworker/u8:0+flush-259:0	21:05:36	0
1257176	99	40	35,3	cyclictest	335557	-21	systemd-journal	20:15:36	2
1257176	99	39	35,3	cyclictest	1490329	-21	kworker/u8:0+flush-259:0	00:00:25	2
1257170	99	39	35,3	cyclictest	1574042	-21	kworker/u8:0+flush-259:0	00:35:01	0
1257170	99	39	35,3	cyclictest	1574042	-21	kworker/u8:0+flush-259:0	00:35:00	0
1257170	99	39	35,3	cyclictest	1262189	-21	kworker/u8:1+flush-259:0	19:30:20	0
1257183	99	38	32,4	cyclictest	1469802	-21	kworker/u8:2+flush-259:0	22:50:00	3
1257176	99	38	34,3	cyclictest	1521388	-21	kworker/u8:1+flush-259:0	23:35:27	2
1257170	99	38	35,2	cyclictest	1209701	-21	kworker/u8:3+flush-259:0	19:45:20	0
1257183	99	37	31,4	cyclictest	1209701	-21	kworker/u8:3+flush-259:0	19:55:16	3
1257170	99	36	33,2	cyclictest	1387377	-21	kworker/u8:4+events_unbound	21:25:19	0
1257170	99	36	32,3	cyclictest	1433818	-21	kworker/u8:3+events_unbound	22:57:36	0
1257170	99	35	31,3	cyclictest	1574042	-21	kworker/u8:0+events_unbound	00:18:57	0
1257170	99	35	31,3	cyclictest	1324903	-21	apt-get	20:13:56	0
1257173	99	34	29,3	cyclictest	1531643	-21	apt-get	23:35:01	1
1257170	99	34	30,3	cyclictest	1381236	-21	kworker/u8:1+flush-259:0	22:00:15	0
1257170	99	33	30,2	cyclictest	1433818	-21	kworker/u8:3+flush-259:0	22:10:22	0
1257170	99	33	29,3	cyclictest	1439298	-21	kworker/u8:0+events_unbound	22:19:36	0
1257170	99	33	29,3	cyclictest	1360761	-21	kworker/u8:2+events_unbound	21:14:37	0
1257183	99	32	28,3	cyclictest	1537285	-21	kworker/u8:2+flush-259:0	23:55:00	3
1257176	99	32	27,4	cyclictest	1490329	-21	kworker/u8:0+events_unbound	23:25:23	2
1257173	99	32	28,3	cyclictest	335557	-21	systemd-journal	00:27:58	1
1257173	99	32	28,3	cyclictest	335557	-21	systemd-journal	00:27:57	1
1257170	99	32	28,3	cyclictest	1490329	-21	kworker/u8:0+flush-259:0	23:25:17	0
1257170	99	32	27,4	cyclictest	1511111	-21	kworker/u8:2+flush-259:0	23:20:11	0
1257183	99	31	24,5	cyclictest	1579093	-21	gpgv	00:20:01	3
1257183	99	31	24,5	cyclictest	1532272	-21	cp	23:35:02	3
1257176	99	31	27,3	cyclictest	1360761	-21	kworker/u8:2+flush-259:0	21:00:26	2
1257173	99	31	24,5	cyclictest	1401689	-21	ntpq	21:25:18	1
1257173	99	31	23,6	cyclictest	1568244	-21	apt-get	00:09:59	1
1257170	99	31	27,3	cyclictest	1531524	-21	kworker/u8:3+events_unbound	00:10:24	0
1257170	99	31	26,4	cyclictest	1558138	-21	kworker/u8:4+events_unbound	00:03:48	0
1257173	99	30	27,2	cyclictest	1433818	-21	kworker/u8:3+events_unbound	22:10:27	1
1257173	99	30	24,4	cyclictest	335557	-21	systemd-journal	19:40:00	1
1257170	99	30	27,2	cyclictest	1298761	-21	kworker/u8:4+events_unbound	19:54:38	0
1257170	99	30	27,2	cyclictest	1298761	-21	kworker/u8:4+events_unbound	19:54:38	0
1257170	99	30	27,2	cyclictest	1262189	-21	kworker/u8:1+flush-259:0	20:20:21	0
1257170	99	30	26,3	cyclictest	1433818	-21	kworker/u8:3+flush-259:0	22:40:26	0
1257183	99	29	25,2	cyclictest	1278421	-21	apt-get	19:30:12	3
1257176	99	29	26,2	cyclictest	1511111	-21	kworker/u8:2+events_unbound	23:30:20	2
1257173	99	29	23,4	cyclictest	1318540	-21	ntpq	20:05:25	1
1257170	99	29	25,3	cyclictest	1547851	-21	apt-get	23:50:10	0
1257170	99	29	25,3	cyclictest	1490329	-21	kworker/u8:0+events_unbound	23:19:38	0
1257170	99	29	25,3	cyclictest	1209701	-21	kworker/u8:3+flush-259:0	20:30:21	0
1257170	99	29	24,4	cyclictest	1439298	-21	kworker/u8:0+flush-259:0	22:20:16	0
1257170	99	29	24,3	cyclictest	1366454	-21	apt-get	20:55:12	0
1257183	99	28	23,4	cyclictest	1382268	-21	/usr/sbin/munin	21:10:19	3
1257176	99	28	22,4	cyclictest	335557	-21	systemd-journal	00:10:02	2
1257176	99	28	22,4	cyclictest	1360158	-21	ntpq	20:45:22	2
1257173	99	28	22,4	cyclictest	335557	-21	systemd-journal	20:48:36	1
1257173	99	28	21,5	cyclictest	1520448	-21	ntpq	23:20:21	1
1257170	99	28	24,3	cyclictest	1574042	-21	kworker/u8:0+events_unbound	00:35:21	0
1257170	99	28	24,3	cyclictest	1433818	-21	kworker/u8:3+events_unbound	22:45:18	0
1257176	99	27	23,3	cyclictest	1209701	-21	kworker/u8:3+flush-259:0	19:45:17	2
1257176	99	27	22,4	cyclictest	1433818	-21	kworker/u8:3+events_unbound	23:10:20	2
1257176	99	27	22,3	cyclictest	1350795	-21	kworker/u8:0+events_unbound	20:50:02	2
1257176	99	27	21,4	cyclictest	1480207	-21	latency_hist	22:45:02	2
1257176	99	27	20,5	cyclictest	335557	-21	systemd-journal	23:05:36	2
1257173	99	27	21,4	cyclictest	1470148	-21	/usr/sbin/munin	22:35:12	1
1257170	99	27	23,3	cyclictest	1387169	-21	kworker/u8:3+events_unbound	21:20:20	0
1257170	99	27	20,5	cyclictest	1567406	-21	ntpq	00:05:22	0
1257170	99	27	19,5	cyclictest	1272997	-21	systemctl	19:25:00	0
1257183	99	26	21,4	cyclictest	1423896	-21	apt-get	21:50:12	3
1257176	99	26	22,3	cyclictest	1298761	-21	kworker/u8:4+events_unbound	20:00:20	2
1257176	99	26	22,3	cyclictest	1209701	-21	kworker/u8:3+flush-259:0	19:50:21	2
1257176	99	26	22,3	cyclictest	1209701	-21	kworker/u8:3+flush-259:0	19:50:21	2
1257176	99	26	21,4	cyclictest	1209701	-21	kworker/u8:3+flush-259:0	20:40:21	2
1257173	99	26	20,4	cyclictest	1532325	-21	apt-get	23:35:11	1
1257170	99	26	22,3	cyclictest	1531524	-21	kworker/u8:3+events_unbound	23:45:18	0
1257170	99	26	22,3	cyclictest	1209701	-21	kworker/u8:3+events_unbound	19:35:10	0
1257183	99	25	18,5	cyclictest	1463912	-21	ntpq	22:25:21	3
1257176	99	25	23,1	cyclictest	1579630	-21	kworker/u8:2+flush-259:0	00:30:21	2
1257176	99	25	23,1	cyclictest	1579630	-21	kworker/u8:2+flush-259:0	00:30:20	2
1257176	99	25	21,3	cyclictest	1381236	-21	kworker/u8:1+events_unbound	21:30:19	2
1257170	99	25	22,2	cyclictest	1480250	-21	kworker/u8:4+events_unbound	22:51:38	0
1257170	99	25	21,3	cyclictest	1469802	-21	kworker/u8:2+events_unbound	22:35:15	0
1257170	99	25	21,3	cyclictest	1413539	-21	kworker/u8:0+events_unbound	21:50:14	0
1257170	99	25	21,3	cyclictest	1298761	-21	kworker/u8:4+events_unbound	20:15:21	0
1257170	99	25	21,3	cyclictest	1298761	-21	kworker/u8:4+events_unbound	19:59:38	0
1257183	99	24	20,3	cyclictest	1511111	-21	kworker/u8:2+flush-259:0	23:20:25	3
1257183	99	24	20,2	cyclictest	1490329	-21	kworker/u8:0+flush-259:0	23:05:10	3
1257183	99	24	19,3	cyclictest	1335578	-21	apt-get	20:25:11	3
1257183	99	24	18,4	cyclictest	1479328	-21	ntpq	22:40:19	3
1257176	99	24	21,2	cyclictest	1381236	-21	kworker/u8:1+flush-259:0	22:00:17	2
1257176	99	24	19,4	cyclictest	1439298	-21	kworker/u8:0+flush-259:0	22:20:00	2
1257176	99	24	18,4	cyclictest	335557	-21	systemd-journal	22:47:36	2
1257176	99	24	17,5	cyclictest	1516231	-21	latency_hist	23:20:01	2
1257173	99	24	21,2	cyclictest	1531524	-21	kworker/u8:3+events_unbound	00:01:48	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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