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
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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 Mon Sep 07, 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
1174682	99	40	37,2	cyclictest	1212029	-21	kworker/u8:3+events_unbound	07:55:18	1
1174682	99	40	36,3	cyclictest	1388587	-21	apt-get	10:35:11	1
1174685	99	39	36,2	cyclictest	1388339	-21	kworker/u8:2+flush-259:0	10:40:21	2
1174694	99	38	34,3	cyclictest	1331231	-21	kworker/u8:3+flush-259:0	09:55:21	3
1174682	99	38	32,4	cyclictest	1180781	-21	apt-get	07:15:12	1
1174685	99	37	30,5	cyclictest	1243066	-21	kworker/u8:3+flush-259:0	09:25:00	2
1174682	99	37	33,3	cyclictest	1367920	-21	apt-get	10:15:11	1
1174680	99	37	30,5	cyclictest	1356441	-21	ntpq	10:00:22	0
1174680	99	37	30,5	cyclictest	1315924	-21	diskstats	09:25:14	0
1174685	99	36	29,5	cyclictest	335557	-21	systemd-journal	09:41:17	2
1174680	99	36	30,4	cyclictest	1465971	-21	latency_hist	11:50:01	0
1174685	99	35	31,3	cyclictest	1243066	-21	kworker/u8:3+flush-259:0	08:45:20	2
1174682	99	35	30,3	cyclictest	1248809	-21	kworker/u8:2+events_unbound	09:10:18	1
1174694	99	34	29,4	cyclictest	1263947	-21	/usr/sbin/munin	08:35:14	3
1174694	99	34	29,4	cyclictest	1263947	-21	/usr/sbin/munin	08:35:14	3
1174685	99	34	31,2	cyclictest	1248809	-21	kworker/u8:2+events_unbound	09:10:24	2
1174685	99	34	29,3	cyclictest	1424546	-21	kworker/u8:2+flush-259:0	11:50:20	2
1174682	99	33	29,3	cyclictest	1315521	-21	kworker/u8:2+flush-259:0	09:25:24	1
1174694	99	32	26,5	cyclictest	1336371	-21	cat	09:45:01	3
1174680	99	32	21,9	cyclictest	1607760	-21	fwupd	09:41:21	0
1174694	99	31	27,3	cyclictest	1248809	-21	kworker/u8:2+flush-259:0	08:40:24	3
1174685	99	31	27,3	cyclictest	1482170	-21	kworker/u8:3+flush-259:0	12:20:21	2
1174682	99	31	27,3	cyclictest	1429930	-21	kworker/u8:0+flush-259:0	11:55:25	1
1174680	99	31	24,5	cyclictest	1475850	-21	ntpq	11:55:21	0
1174682	99	30	27,2	cyclictest	1243066	-21	kworker/u8:3+flush-259:0	09:20:26	1
1174685	99	29	22,5	cyclictest	335557	-21	systemd-journal	08:35:00	2
1174682	99	29	25,3	cyclictest	1305409	-21	kworker/u8:1+events_unbound	10:05:24	1
1174694	99	28	24,3	cyclictest	1248462	-21	/usr/sbin/munin	08:20:15	3
1174685	99	28	24,3	cyclictest	1455617	-21	kworker/u8:1+flush-259:0	11:45:17	2
1174685	99	28	24,3	cyclictest	1403879	-21	kworker/u8:1+events_unbound	11:05:24	2
1174685	99	28	24,3	cyclictest	1174212	-21	kworker/u8:2+events_unbound	07:45:21	2
1174685	99	28	22,4	cyclictest	1206422	-21	latency_hist	07:40:01	2
1174682	99	28	25,2	cyclictest	1429930	-21	kworker/u8:0+flush-259:0	11:15:25	1
1174685	99	27	23,3	cyclictest	1362736	-21	kworker/u8:4+flush-259:0	10:15:24	2
1174685	99	27	23,3	cyclictest	1212029	-21	kworker/u8:3+flush-259:0	08:05:00	2
1174685	99	27	23,3	cyclictest	1196119	-21	kworker/u8:1+flush-259:0	08:15:19	2
1174682	99	27	22,4	cyclictest	335557	-21	systemd-journal	09:35:17	1
1174680	99	27	21,4	cyclictest	1232699	-21	latency_hist	08:05:00	0
1174680	99	27	14,12	cyclictest	1383169	-21	sh	10:30:00	0
1174694	99	26	22,2	cyclictest	1397619	-21	kworker/u8:3+flush-259:0	10:45:16	3
1174694	99	26	20,4	cyclictest	1217184	-21	latency_hist	07:50:00	3
1174694	99	26	20,4	cyclictest	1211109	-21	ntpq	07:40:20	3
1174685	99	26	23,2	cyclictest	1279259	-21	kworker/u8:0+flush-259:0	09:15:21	2
1174685	99	26	23,2	cyclictest	1248809	-21	kworker/u8:2+events_unbound	08:25:00	2
1174685	99	26	22,3	cyclictest	1424546	-21	kworker/u8:2+flush-259:0	12:00:21	2
1174685	99	26	22,3	cyclictest	1388339	-21	kworker/u8:2+events_unbound	10:49:19	2
1174685	99	26	22,3	cyclictest	1305409	-21	kworker/u8:1+events_unbound	10:05:18	2
1174685	99	26	22,2	cyclictest	500	-21	systemd-logind	11:15:00	2
1174685	99	26	21,4	cyclictest	1305409	-21	kworker/u8:1+events_unbound	09:59:19	2
1174685	99	26	21,3	cyclictest	1403879	-21	kworker/u8:1+flush-259:0	11:05:00	2
1174680	99	26	19,5	cyclictest	1346154	-21	ntpq	09:50:23	0
1174685	99	25	22,2	cyclictest	1331231	-21	kworker/u8:3+flush-259:0	10:30:17	2
1174685	99	25	21,3	cyclictest	1424546	-21	kworker/u8:2+events_unbound	11:41:17	2
1174694	99	24	21,2	cyclictest	1388339	-21	kworker/u8:2+flush-259:0	10:40:25	3
1174694	99	24	18,4	cyclictest	1179217	-21	ntpq	07:10:22	3
1174685	99	24	20,3	cyclictest	1424546	-21	kworker/u8:2+flush-259:0	12:15:11	2
1174682	99	24	20,3	cyclictest	1232931	-21	kworker/u8:0+flush-259:0	08:05:20	1
1174682	99	24	19,4	cyclictest	1409228	-21	/usr/sbin/munin	10:55:13	1
1174680	99	24	18,4	cyclictest	335557	-21	systemd-journal	07:55:00	0
1174680	99	24	18,4	cyclictest	1237875	-21	latency_hist	08:10:00	0
1174694	99	23	20,2	cyclictest	1315521	-21	kworker/u8:2+events_unbound	09:25:21	3
1174694	99	23	20,2	cyclictest	1227560	-21	kworker/u8:2+flush-259:0	08:00:18	3
1174694	99	23	19,3	cyclictest	335557	-21	systemd-journal	10:35:00	3
1174694	99	23	19,3	cyclictest	1482170	-21	kworker/u8:3+flush-259:0	12:30:16	3
1174685	99	23	20,2	cyclictest	1175129	-21	kworker/u8:4+flush-259:0	07:30:19	2
1174685	99	23	19,3	cyclictest	1362736	-21	kworker/u8:4+events_unbound	10:12:18	2
1174685	99	23	19,3	cyclictest	1248809	-21	kworker/u8:2+events_unbound	09:05:13	2
1174682	99	23	19,3	cyclictest	1403879	-21	kworker/u8:1+events_unbound	11:05:22	1
1174682	99	23	19,3	cyclictest	1243313	-21	apt-get	08:15:12	1
1174682	99	23	19,3	cyclictest	1212280	-21	apt-get	07:45:11	1
1174694	99	22	19,2	cyclictest	1482170	-21	kworker/u8:3+flush-259:0	12:20:21	3
1174694	99	22	18,3	cyclictest	1424546	-21	kworker/u8:2+flush-259:0	11:45:00	3
1174685	99	22	18,3	cyclictest	1175129	-21	kworker/u8:4+flush-259:0	07:25:00	2
1174682	99	22	18,3	cyclictest	1175129	-21	kworker/u8:4+events_unbound	07:20:24	1
1174680	99	22	17,4	cyclictest	1409254	-21	apt-get	10:55:10	0
1174680	99	22	17,4	cyclictest	1131435	-21	kworker/u8:1+flush-259:0	07:15:01	0
1174680	99	22	1,18	cyclictest	1190915	-21	latency_hist	07:25:01	0
1174680	99	22	10,10	cyclictest	1362837	-21	cpuspeed_turbos	10:10:14	0
1174680	99	22	0,2	cyclictest	1326351	-21	fschecks_time	09:35:15	0
1174694	99	21	18,2	cyclictest	1424546	-21	kworker/u8:2+flush-259:0	12:25:22	3
1174694	99	21	18,2	cyclictest	1357322	-21	kworker/u8:2+flush-259:0	10:10:27	3
1174694	99	21	18,2	cyclictest	1196119	-21	kworker/u8:1+events_unbound	08:10:15	3
1174694	99	21	18,2	cyclictest	1196119	-21	kworker/u8:1+events_unbound	07:50:19	3
1174694	99	21	17,3	cyclictest	1331231	-21	kworker/u8:3+flush-259:0	10:25:20	3
1174694	99	21	16,4	cyclictest	1340871	-21	ntpq	09:45:21	3
1174694	99	21	15,4	cyclictest	1279247	-21	latency_hist	08:50:01	3
1174685	99	21	18,2	cyclictest	1372590	-21	kworker/u8:0+events_unbound	10:25:32	2
1174685	99	21	18,2	cyclictest	1243066	-21	kworker/u8:3+events_unbound	08:40:19	2
1174685	99	21	17,3	cyclictest	1482170	-21	kworker/u8:3+flush-259:0	12:31:21	2
1174685	99	21	17,3	cyclictest	1403879	-21	kworker/u8:1+flush-259:0	10:55:20	2
1174685	99	21	17,3	cyclictest	1174212	-21	kworker/u8:2+flush-259:0	07:20:01	2
1174685	99	21	13,6	cyclictest	1357303	-21	latency_hist	10:05:01	2
1174682	99	21	18,2	cyclictest	1279259	-21	kworker/u8:0+flush-259:0	09:00:22	1
1174682	99	21	17,3	cyclictest	1372590	-21	kworker/u8:0+events_unbound	10:50:24	1
1174682	99	21	17,3	cyclictest	1372590	-21	kworker/u8:0+events_unbound	10:50:23	1
1174682	99	21	17,2	cyclictest	1	-21	systemd	08:15:00	1
1174680	99	21	13,5	cyclictest	335557	-21	systemd-journal	07:45:17	0
1174680	99	21	0,5	cyclictest	1321219	-21	fschecks_time	09:30:14	0
1174680	99	21	0,18	cyclictest	1460895	-21	cat	11:45:01	0
1174694	99	20	17,2	cyclictest	1471850	-21	apt-get	11:55:12	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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