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 Wed Feb 04, 2026 12:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1084890	99	42	38,3	cyclictest	1189599	-21	kworker/u8:1+flush-259:0	08:50:16	3
1084885	99	40	37,2	cyclictest	1240909	-21	kworker/u8:3+flush-259:0	10:15:00	1
1084885	99	39	33,4	cyclictest	1147065	-21	ntpq	08:05:21	1
1084885	99	39	33,4	cyclictest	1147065	-21	ntpq	08:05:20	1
1084890	99	38	34,3	cyclictest	1069558	-21	kworker/u8:0+flush-259:0	07:10:15	3
1084890	99	37	31,4	cyclictest	252	-21	systemd-journal	09:50:34	3
1084890	99	36	32,3	cyclictest	1240909	-21	kworker/u8:3+flush-259:0	10:10:16	3
1084881	99	36	30,4	cyclictest	1179306	-21	latency_hist	08:40:01	0
1084885	99	35	30,4	cyclictest	1189823	-21	apt-get	08:50:13	1
1084881	99	35	30,3	cyclictest	1287327	-21	gpgv	10:25:01	0
1084888	99	34	31,2	cyclictest	1189599	-21	kworker/u8:1+events_unbound	12:15:17	2
1084888	99	34	28,4	cyclictest	1334438	-21	/usr/sbin/munin	11:10:22	2
1084885	99	34	30,3	cyclictest	509	-21	rs:main		1
1084881	99	34	29,3	cyclictest	1246504	-21	diskstats	09:45:14	0
1084890	99	33	26,4	cyclictest	252	-21	systemd-journal	12:31:34	3
1084888	99	33	28,3	cyclictest	1282091	-21	latency_hist	10:20:00	2
1084888	99	33	27,4	cyclictest	252	-21	systemd-journal	12:08:35	2
1084885	99	33	28,4	cyclictest	1251482	-21	apt-get	09:50:12	1
1084881	99	33	29,3	cyclictest	1407715	-21	kworker/u8:2+flush-259:0	12:25:18	0
1084890	99	32	26,4	cyclictest	1210513	-21	diskstats	09:10:15	3
1084890	99	32	26,4	cyclictest	1119949	-21	ntpq	07:40:19	3
1084890	99	32	25,5	cyclictest	1210089	-21	latency_hist	09:10:01	3
1084890	99	32	24,5	cyclictest	1287207	-21	latency_hist	10:25:00	3
1084885	99	32	28,3	cyclictest	1298267	-21	apt-get	10:35:12	1
1084890	99	31	27,3	cyclictest	1308361	-21	kworker/u8:0+events_unbound	11:20:15	3
1084890	99	31	25,4	cyclictest	1397530	-21	diskstats	12:15:15	3
1084888	99	31	26,4	cyclictest	1386366	-21	apt-get	12:01:19	2
1084890	99	30	25,4	cyclictest	1179571	-21	apt-get	08:40:13	3
1084890	99	29	25,3	cyclictest	1334222	-21	kworker/u8:4+events_unbound	11:45:19	3
1084890	99	29	25,3	cyclictest	1308361	-21	kworker/u8:0+flush-259:0	11:35:00	3
1084890	99	29	25,3	cyclictest	1303120	-21	kworker/u8:2+events_unbound	11:15:15	3
1084890	99	29	25,3	cyclictest	1189599	-21	kworker/u8:1+flush-259:0	09:25:21	3
1084888	99	29	25,3	cyclictest	1303120	-21	kworker/u8:2+flush-259:0	11:15:21	2
1084885	99	29	26,2	cyclictest	1047101	-21	kworker/u8:2+events_unbound	07:25:18	1
1084885	99	29	25,3	cyclictest	1164063	-21	/usr/sbin/munin	08:25:14	1
1084885	99	29	25,3	cyclictest	1126026	-21	gpgv	07:50:00	1
1084885	99	29	25,3	cyclictest	1126026	-21	gpgv	07:50:00	1
1084885	99	29	21,6	cyclictest	1417395	-21	ntpq	12:30:21	1
1084881	99	29	23,5	cyclictest	1158267	-21	latency_hist	08:20:00	0
1084890	99	28	22,4	cyclictest	1386723	-21	latency_hist	12:05:00	3
1084885	99	28	25,2	cyclictest	1189599	-21	kworker/u8:1+events_unbound	09:10:16	1
1084885	99	28	22,5	cyclictest	1402546	-21	/usr/sbin/munin	12:20:14	1
1084890	99	27	24,2	cyclictest	1303120	-21	kworker/u8:2+flush-259:0	11:10:00	3
1084890	99	27	23,3	cyclictest	1230685	-21	kworker/u8:0+events_unbound	10:35:24	3
1084890	99	27	23,3	cyclictest	1189599	-21	kworker/u8:1+flush-259:0	11:00:15	3
1084890	99	27	23,3	cyclictest	1189599	-21	kworker/u8:1+flush-259:0	09:30:23	3
1084890	99	27	23,3	cyclictest	1158289	-21	gpgv	08:20:00	3
1084890	99	27	22,3	cyclictest	1069558	-21	kworker/u8:0+events_unbound	07:30:22	3
1084890	99	27	21,4	cyclictest	1189599	-21	kworker/u8:1+flush-259:0	09:20:18	3
1084885	99	27	22,3	cyclictest	1115698	-21	kworker/u8:2+events_unbound	09:15:16	1
1084881	99	27	22,4	cyclictest	1308361	-21	kworker/u8:0+flush-259:0	11:10:16	0
1084881	99	27	22,3	cyclictest	252	-21	systemd-journal	09:53:34	0
1084881	99	27	22,3	cyclictest	1240909	-21	kworker/u8:3+flush-259:0	10:10:21	0
1084881	99	27	21,4	cyclictest	1137613	-21	diskstats	08:00:14	0
1084890	99	26	22,3	cyclictest	1105607	-21	kworker/u8:4+events_unbound	07:45:23	3
1084890	99	26	22,3	cyclictest	1105607	-21	kworker/u8:4+events_unbound	07:45:23	3
1084890	99	26	20,4	cyclictest	1261501	-21	latency_hist	10:00:00	3
1084888	99	26	23,2	cyclictest	1308361	-21	kworker/u8:0+flush-259:0	11:25:01	2
1084888	99	26	23,2	cyclictest	1047101	-21	kworker/u8:2+flush-259:0	07:20:14	2
1084888	99	26	22,3	cyclictest	1105607	-21	kworker/u8:4+flush-259:0	07:45:23	2
1084888	99	26	22,3	cyclictest	1105607	-21	kworker/u8:4+flush-259:0	07:45:22	2
1084888	99	26	21,4	cyclictest	1355035	-21	kworker/u8:2+flush-259:0	11:35:22	2
1084885	99	26	22,3	cyclictest	1189599	-21	kworker/u8:1+events_unbound	10:20:23	1
1084885	99	26	21,4	cyclictest	1115698	-21	kworker/u8:2+events_unbound	08:40:24	1
1084885	99	26	21,3	cyclictest	1115698	-21	kworker/u8:2+flush-259:0	07:59:59	1
1084890	99	25	17,5	cyclictest	1152179	-21	ntpq	08:10:20	3
1084885	99	25	21,3	cyclictest	1189599	-21	kworker/u8:1+events_unbound	10:05:22	1
1084885	99	25	20,3	cyclictest	1329044	-21	latency_hist	11:05:01	1
1084885	99	25	20,3	cyclictest	1303120	-21	kworker/u8:2+flush-259:0	10:45:00	1
1084881	99	25	20,3	cyclictest	252	-21	systemd-journal	11:34:35	0
1084881	99	25	18,5	cyclictest	1270974	-21	ntpq	10:05:21	0
1084890	99	24	21,2	cyclictest	1334222	-21	kworker/u8:4+events_unbound	11:25:23	3
1084890	99	24	21,2	cyclictest	1189599	-21	kworker/u8:1+events_unbound	10:15:23	3
1084890	99	24	20,3	cyclictest	1158003	-21	kworker/u8:0+flush-259:0	08:25:16	3
1084890	99	24	19,4	cyclictest	1355035	-21	kworker/u8:2+flush-259:0	11:35:21	3
1084890	99	24	18,4	cyclictest	509	-21	rs:main		3
1084890	99	24	18,4	cyclictest	509	-21	rs:main		3
1084888	99	24	19,4	cyclictest	252	-21	systemd-journal	08:55:00	2
1084885	99	24	20,3	cyclictest	1386949	-21	kworker/u8:3+flush-259:0	12:10:15	1
1084885	99	24	20,3	cyclictest	1355035	-21	kworker/u8:2+events_unbound	11:35:15	1
1084885	99	24	20,3	cyclictest	1189599	-21	kworker/u8:1+flush-259:0	10:25:16	1
1084885	99	24	19,4	cyclictest	1115698	-21	kworker/u8:2+flush-259:0	08:35:25	1
1084881	99	24	21,2	cyclictest	1303120	-21	kworker/u8:2+flush-259:0	10:50:20	0
1084881	99	24	20,3	cyclictest	1158951	-21	apt-get	08:20:14	0
1084890	99	23	19,3	cyclictest	1126652	-21	kworker/u8:1+events_unbound	08:00:20	3
1084890	99	23	18,4	cyclictest	1163846	-21	kworker/u8:3+flush-259:0	08:30:21	3
1084888	99	23	18,4	cyclictest	1130672	-21	ntpq	07:50:22	2
1084885	99	23	19,3	cyclictest	1376604	-21	apt-get	11:55:10	1
1084885	99	23	18,3	cyclictest	1189599	-21	kworker/u8:1+flush-259:0	12:15:20	1
1084885	99	23	17,4	cyclictest	1225528	-21	latency_hist	09:25:01	1
1084881	99	23	19,3	cyclictest	1189599	-21	kworker/u8:1+flush-259:0	10:15:24	0
1084881	99	23	17,4	cyclictest	1370262	-21	ntpq	11:45:18	0
1084881	99	23	17,4	cyclictest	1240046	-21	ntpq	09:35:19	0
1084890	99	22	18,3	cyclictest	1418547	-21	apt-get	12:35:11	3
1084890	99	22	18,3	cyclictest	1047101	-21	kworker/u8:2+events_unbound	07:28:34	3
1084890	99	22	16,4	cyclictest	1407484	-21	latency_hist	12:25:01	3
1084888	99	22	15,5	cyclictest	252	-21	systemd-journal	12:35:00	2
1084885	99	22	19,2	cyclictest	1069558	-21	kworker/u8:0+flush-259:0	07:10:21	1
1084885	99	22	18,3	cyclictest	1407715	-21	kworker/u8:2+events_unbound	12:25:16	1
1084885	99	22	18,3	cyclictest	1189599	-21	kworker/u8:1+events_unbound	09:30:21	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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