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 Tue Mar 10, 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
1187495	99	41	34,5	cyclictest	1275574	-21	latency_hist	08:35:00	1
1187502	99	40	34,4	cyclictest	1328411	-21	latency_hist	09:25:00	3
1187502	99	33	30,2	cyclictest	1197542	-21	kworker/u8:1+flush-259:0	08:00:01	3
1187502	99	33	30,2	cyclictest	1197542	-21	kworker/u8:1+flush-259:0	08:00:00	3
1187502	99	32	25,5	cyclictest	1420454	-21	ntpq	10:50:18	3
1187495	99	32	25,5	cyclictest	252	-21	systemd-journal	09:49:59	1
1187495	99	31	27,3	cyclictest	1473388	-21	kworker/u8:3+flush-259:0	12:14:59	1
1187492	99	31	25,4	cyclictest	252	-21	systemd-journal	10:06:19	0
1187500	99	30	27,2	cyclictest	1260207	-21	kworker/u8:3+flush-259:0	08:30:00	2
1187495	99	30	25,3	cyclictest	1353996	-21	kworker/u8:2+flush-259:0	10:15:14	1
1187495	99	30	25,3	cyclictest	1353996	-21	kworker/u8:2+flush-259:0	10:15:14	1
1187500	99	27	21,4	cyclictest	252	-21	systemd-journal	11:33:17	2
1187500	99	27	20,5	cyclictest	1260608	-21	diskstats	08:20:13	2
1187495	99	27	22,3	cyclictest	1224359	-21	/usr/sbin/munin	07:45:14	1
1187492	99	27	23,3	cyclictest	1343854	-21	kworker/u8:3+flush-259:0	10:00:26	0
1187492	99	27	22,4	cyclictest	1322833	-21	apt-get	09:20:03	0
1187500	99	26	22,2	cyclictest	0	-21	swapper/2	09:20:00	2
1187500	99	25	22,2	cyclictest	1353996	-21	kworker/u8:2+flush-259:0	11:15:19	2
1187495	99	25	22,2	cyclictest	1254967	-21	kworker/u8:1+flush-259:0	08:55:21	1
1187492	99	25	21,3	cyclictest	1279763	-21	kworker/u8:2+events_unbound	08:50:00	0
1187502	99	24	20,3	cyclictest	1473388	-21	kworker/u8:3+flush-259:0	12:10:00	3
1187500	99	24	20,3	cyclictest	1306942	-21	kworker/u8:0+flush-259:0	09:15:01	2
1187495	99	24	17,5	cyclictest	252	-21	systemd-journal	10:45:00	1
1187500	99	23	19,2	cyclictest	1353996	-21	kworker/u8:2+flush-259:0	11:25:01	2
1187500	99	23	17,4	cyclictest	1405861	-21	latency_hist	10:40:00	2
1187495	99	23	18,3	cyclictest	1353996	-21	kworker/u8:2+flush-259:0	12:05:18	1
1187492	99	23	17,4	cyclictest	1333555	-21	latency_hist	09:30:00	0
1187492	99	23	16,5	cyclictest	1224331	-21	cp	07:45:00	0
1187500	99	22	18,3	cyclictest	1353996	-21	kworker/u8:2+events_unbound	12:07:18	2
1187500	99	22	18,3	cyclictest	1254967	-21	kworker/u8:1+flush-259:0	09:45:00	2
1187500	99	22	17,3	cyclictest	1473388	-21	kworker/u8:3+events_unbound	11:45:18	2
1187492	99	22	18,3	cyclictest	1395539	-21	kworker/u8:3+flush-259:0	10:50:00	0
1187492	99	22	17,4	cyclictest	1254141	-21	ntpq	08:10:21	0
1187492	99	22	16,4	cyclictest	252	-21	systemd-journal	12:16:18	0
1187502	99	21	17,3	cyclictest	1244934	-21	kworker/u8:3+flush-259:0	08:05:26	3
1187502	99	21	15,4	cyclictest	1312791	-21	apt-get	09:10:11	3
1187500	99	21	18,2	cyclictest	1380032	-21	kworker/u8:5+events_unbound	10:15:19	2
1187500	99	21	18,2	cyclictest	1380032	-21	kworker/u8:5+events_unbound	10:15:18	2
1187500	99	21	18,2	cyclictest	1279763	-21	kworker/u8:2+flush-259:0	08:38:48	2
1187500	99	21	16,3	cyclictest	1446915	-21	kworker/u8:1+events_unbound	11:50:16	2
1187500	99	21	14,4	cyclictest	1494011	-21	latency_hist	12:05:00	2
1187495	99	21	17,3	cyclictest	1223814	-21	gpgv	07:45:01	1
1187495	99	21	17,3	cyclictest	1223814	-21	gpgv	07:45:00	1
1187492	99	21	18,2	cyclictest	1234458	-21	kworker/u8:2+events_unbound	08:00:00	0
1187492	99	21	18,2	cyclictest	1234458	-21	kworker/u8:2+events_unbound	08:00:00	0
1187492	99	21	16,3	cyclictest	1473388	-21	kworker/u8:3+events_unbound	11:50:00	0
1187502	99	20	14,5	cyclictest	252	-21	systemd-journal	08:15:00	3
1187500	99	20	16,3	cyclictest	1509507	-21	kworker/u8:0+flush-259:0	12:25:17	2
1187500	99	20	16,3	cyclictest	1380031	-21	kworker/u8:0+events_unbound	10:20:19	2
1187500	99	20	15,3	cyclictest	1519982	-21	/usr/sbin/munin	12:30:23	2
1187500	99	20	15,3	cyclictest	1519982	-21	/usr/sbin/munin	12:30:23	2
1187500	99	20	14,4	cyclictest	1359295	-21	latency_hist	09:55:01	2
1187500	99	20	11,6	cyclictest	252	-21	systemd-journal	07:45:00	2
1187500	99	20	11,6	cyclictest	252	-21	systemd-journal	07:44:59	2
1187495	99	20	17,2	cyclictest	1307181	-21	apt-get	09:05:11	1
1187495	99	20	14,4	cyclictest	1323046	-21	cat	09:20:00	1
1187495	99	20	14,4	cyclictest	1284953	-21	ntpq	08:40:20	1
1187492	99	20	17,2	cyclictest	1380032	-21	kworker/u8:5+events_unbound	10:35:00	0
1187492	99	20	16,3	cyclictest	1494238	-21	kworker/u8:4+events_unbound	12:15:00	0
1187492	99	20	16,3	cyclictest	1431905	-21	kworker/u8:0+events_unbound	12:00:17	0
1187492	99	20	16,3	cyclictest	1380032	-21	kworker/u8:5+flush-259:0	10:45:01	0
1187502	99	19	16,1	cyclictest	0	-21	swapper/3	09:45:00	3
1187502	99	19	15,3	cyclictest	1317927	-21	apt-get	09:15:10	3
1187502	99	19	15,3	cyclictest	1279763	-21	kworker/u8:2+flush-259:0	09:05:01	3
1187502	99	19	14,4	cyclictest	1254967	-21	kworker/u8:1+flush-259:0	08:55:19	3
1187500	99	19	17,1	cyclictest	0	-21	swapper/2	09:24:59	2
1187500	99	19	15,3	cyclictest	1306942	-21	kworker/u8:0+events_unbound	09:26:20	2
1187500	99	19	15,3	cyclictest	1254967	-21	kworker/u8:1+flush-259:0	09:30:20	2
1187500	99	19	15,3	cyclictest	1197542	-21	kworker/u8:1+events_unbound	07:25:18	2
1187500	99	19	15,2	cyclictest	1255019	-21	sh	08:15:00	2
1187500	99	19	12,5	cyclictest	252	-21	systemd-journal	10:35:01	2
1187500	99	19	12,5	cyclictest	1514630	-21	latency_hist	12:25:01	2
1187495	99	19	16,2	cyclictest	509	-21	rs:main		1
1187495	99	19	15,3	cyclictest	2971	-21	cron	10:14:59	1
1187495	99	19	15,3	cyclictest	1187702	-21	apt-get	07:10:11	1
1187495	99	19	15,2	cyclictest	0	-21	swapper/1	11:15:01	1
1187495	99	19	13,4	cyclictest	1254967	-21	kworker/u8:1+flush-259:0	09:40:17	1
1187492	99	19	16,2	cyclictest	1369869	-21	kworker/u8:1+flush-259:0	10:14:59	0
1187492	99	19	16,2	cyclictest	1364477	-21	kworker/u8:4+flush-259:0	10:55:26	0
1187492	99	19	15,3	cyclictest	1380031	-21	kworker/u8:0+events_unbound	10:20:13	0
1187500	99	18	15,2	cyclictest	1353996	-21	kworker/u8:2+events_unbound	11:45:00	2
1187500	99	18	15,2	cyclictest	1279763	-21	kworker/u8:2+flush-259:0	09:00:24	2
1187500	99	18	14,3	cyclictest	1254967	-21	kworker/u8:1+events_unbound	08:40:13	2
1187492	99	18	14,3	cyclictest	1380032	-21	kworker/u8:5+events_unbound	10:15:21	0
1187492	99	18	14,3	cyclictest	1380032	-21	kworker/u8:5+events_unbound	10:15:20	0
1187492	99	18	13,3	cyclictest	252	-21	systemd-journal	11:24:13	0
1187492	99	18	12,4	cyclictest	252	-21	systemd-journal	08:58:51	0
1187502	99	17	14,2	cyclictest	1307603	-21	irqcore	09:05:15	3
1187502	99	17	14,2	cyclictest	1306942	-21	kworker/u8:0+flush-259:0	09:30:00	3
1187502	99	17	14,2	cyclictest	0	-21	swapper/3	11:49:59	3
1187500	99	17	14,2	cyclictest	1353996	-21	kworker/u8:2+flush-259:0	10:55:00	2
1187500	99	17	14,2	cyclictest	1343854	-21	kworker/u8:3+flush-259:0	10:00:19	2
1187500	99	17	14,2	cyclictest	1343834	-21	sh	09:40:00	2
1187500	99	17	13,3	cyclictest	1473388	-21	kworker/u8:3+events_unbound	12:14:22	2
1187500	99	17	13,3	cyclictest	1431905	-21	kworker/u8:0+flush-259:0	11:40:01	2
1187500	99	17	13,3	cyclictest	1369869	-21	kworker/u8:1+events_unbound	10:10:16	2
1187500	99	17	13,3	cyclictest	1254967	-21	kworker/u8:1+events_unbound	08:30:18	2
1187500	99	17	13,3	cyclictest	1182340	-21	kworker/u8:0+events_unbound	07:10:21	2
1187495	99	17	14,1	cyclictest	0	-21	swapper/1	11:59:59	1
1187495	99	17	11,4	cyclictest	1415288	-21	ntpq	10:45:23	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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