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 Sun Sep 20, 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
1247054	99	55	50,3	cyclictest	1377440	-21	kworker/u8:3+events_unbound	21:30:00	1
1247051	99	51	44,5	cyclictest	1367466	-21	latency_hist	21:05:01	0
1247051	99	50	45,4	cyclictest	1241563	-21	kworker/u8:1+flush-259:0	20:50:24	0
1247054	99	47	43,3	cyclictest	1466235	-21	kworker/u8:0+flush-259:0	23:05:26	1
1247051	99	45	42,2	cyclictest	1377440	-21	kworker/u8:3+flush-259:0	23:15:25	0
1247058	99	42	35,5	cyclictest	1518792	-21	latency_hist	23:30:01	2
1247054	99	42	38,3	cyclictest	1267682	-21	kworker/u8:2+events_unbound	19:45:24	1
1247062	99	41	35,4	cyclictest	1545031	-21	latency_hist	23:55:01	3
1247058	99	40	31,6	cyclictest	1524132	-21	cp	23:35:01	2
1247054	99	40	36,3	cyclictest	1241563	-21	kworker/u8:1+flush-259:0	19:55:28	1
1247054	99	38	35,2	cyclictest	1252173	-21	kworker/u8:4+flush-259:0	19:15:26	1
1247054	99	38	35,2	cyclictest	1252173	-21	kworker/u8:4+flush-259:0	19:15:25	1
1247051	99	38	34,3	cyclictest	1377440	-21	kworker/u8:3+flush-259:0	21:15:27	0
1247062	99	37	30,5	cyclictest	1299918	-21	cat	20:00:02	3
1247054	99	37	34,2	cyclictest	1241563	-21	kworker/u8:1+flush-259:0	20:00:15	1
1247054	99	36	34,1	cyclictest	1441018	-21	kworker/u8:1+flush-259:0	22:35:25	1
1247051	99	36	33,2	cyclictest	1252173	-21	kworker/u8:4+flush-259:0	19:30:25	0
1247062	99	35	30,3	cyclictest	1493139	-21	/usr/sbin/munin	23:05:24	3
1247062	99	35	30,3	cyclictest	1341873	-21	apt-get	20:40:12	3
1247058	99	35	30,4	cyclictest	1466638	-21	gpgv	22:40:00	2
1247054	99	35	32,2	cyclictest	1398730	-21	kworker/u8:2+flush-259:0	21:55:16	1
1247051	99	35	29,4	cyclictest	1424978	-21	cat	22:00:01	0
1247051	99	35	28,5	cyclictest	335557	-21	systemd-journal	22:40:01	0
1247058	99	34	28,4	cyclictest	1299290	-21	latency_hist	20:00:01	2
1247058	99	34	27,5	cyclictest	1251249	-21	ntpq	19:10:25	2
1247054	99	34	30,3	cyclictest	1362532	-21	apt-get	21:00:13	1
1247054	99	33	30,2	cyclictest	1377440	-21	kworker/u8:3+events_unbound	22:40:28	1
1247054	99	33	29,3	cyclictest	1398730	-21	kworker/u8:2+flush-259:0	21:35:25	1
1247054	99	33	28,4	cyclictest	1576080	-21	latency_hist	00:25:00	1
1247051	99	33	28,3	cyclictest	1241563	-21	kworker/u8:1+flush-259:0	21:00:00	0
1247062	99	32	25,5	cyclictest	1591229	-21	ntpq	00:35:24	3
1247062	99	31	27,3	cyclictest	1414465	-21	kworker/u8:4+flush-259:0	00:15:26	3
1247062	99	31	25,4	cyclictest	1545263	-21	kworker/u8:3+flush-259:0	00:20:25	3
1247062	99	30	25,3	cyclictest	1377440	-21	kworker/u8:3+events_unbound	23:25:14	3
1247058	99	30	23,5	cyclictest	1420079	-21	diskstats	21:55:15	2
1247054	99	30	27,2	cyclictest	1404162	-21	kworker/u8:1+events_unbound	21:40:20	1
1247054	99	30	27,2	cyclictest	1377440	-21	kworker/u8:3+flush-259:0	22:30:23	1
1247054	99	30	26,3	cyclictest	1513897	-21	apt-get	23:25:11	1
1247054	99	30	26,3	cyclictest	1414465	-21	kworker/u8:4+flush-259:0	23:45:18	1
1247054	99	30	25,4	cyclictest	1566014	-21	apt-get	00:15:14	1
1247051	99	30	24,4	cyclictest	1486865	-21	ntpq	22:55:22	0
1247054	99	29	26,2	cyclictest	1570646	-21	kworker/u8:0+flush-259:0	00:25:14	1
1247054	99	29	26,2	cyclictest	1523567	-21	kworker/u8:1+flush-259:0	23:55:16	1
1247054	99	29	26,2	cyclictest	1320829	-21	kworker/u8:2+events_unbound	20:55:00	1
1247051	99	29	25,3	cyclictest	1545263	-21	kworker/u8:3+events_unbound	23:55:24	0
1247051	99	29	23,4	cyclictest	1336675	-21	apt-get	20:35:13	0
1247062	99	28	24,3	cyclictest	1377440	-21	kworker/u8:3+flush-259:0	21:15:20	3
1247058	99	28	22,4	cyclictest	1425434	-21	cat	22:00:02	2
1247058	99	28	0,26	cyclictest	1	-21	systemd	23:15:00	2
1247054	99	28	26,1	cyclictest	1377440	-21	kworker/u8:3+flush-259:0	22:00:20	1
1247054	99	28	25,2	cyclictest	1414465	-21	kworker/u8:4+flush-259:0	22:20:19	1
1247054	99	28	25,2	cyclictest	1404162	-21	kworker/u8:1+events_unbound	21:45:13	1
1247054	99	28	25,2	cyclictest	1320829	-21	kworker/u8:2+events_unbound	20:25:19	1
1247054	99	28	23,4	cyclictest	335557	-21	systemd-journal	21:08:24	1
1247051	99	28	25,2	cyclictest	1466235	-21	kworker/u8:0+flush-259:0	23:30:16	0
1247062	99	27	20,5	cyclictest	1272887	-21	latency_hist	19:35:00	3
1247058	99	27	20,5	cyclictest	335557	-21	systemd-journal	00:19:24	2
1247054	99	27	24,2	cyclictest	1570646	-21	kworker/u8:0+flush-259:0	00:35:26	1
1247054	99	27	24,2	cyclictest	1414465	-21	kworker/u8:4+flush-259:0	22:10:20	1
1247051	99	27	23,3	cyclictest	1466235	-21	kworker/u8:0+events_unbound	22:50:19	0
1247051	99	27	23,3	cyclictest	1362495	-21	kworker/u8:0+events_unbound	21:10:17	0
1247051	99	27	23,3	cyclictest	1267682	-21	kworker/u8:2+flush-259:0	19:35:25	0
1247062	99	26	22,3	cyclictest	1414465	-21	kworker/u8:4+flush-259:0	22:10:21	3
1247062	99	26	19,5	cyclictest	1278112	-21	latency_hist	19:40:00	3
1247058	99	26	20,4	cyclictest	1331449	-21	/usr/sbin/munin	20:30:15	2
1247054	99	26	23,2	cyclictest	1466235	-21	kworker/u8:0+flush-259:0	23:20:00	1
1247054	99	26	23,2	cyclictest	1377440	-21	kworker/u8:3+events_unbound	22:55:23	1
1247054	99	26	23,2	cyclictest	1320829	-21	kworker/u8:2+events_unbound	20:30:20	1
1247054	99	26	23,2	cyclictest	1252173	-21	kworker/u8:4+flush-259:0	19:35:15	1
1247054	99	26	22,3	cyclictest	1414465	-21	kworker/u8:4+flush-259:0	00:00:16	1
1247054	99	26	22,3	cyclictest	1393926	-21	cat	21:30:01	1
1247054	99	26	22,3	cyclictest	1393926	-21	cat	21:30:00	1
1247051	99	26	22,3	cyclictest	1570646	-21	kworker/u8:0+flush-259:0	00:20:15	0
1247051	99	26	22,3	cyclictest	1466235	-21	kworker/u8:0+events_unbound	23:27:30	0
1247051	99	26	22,3	cyclictest	1320829	-21	kworker/u8:2+events_unbound	20:30:14	0
1247051	99	26	22,3	cyclictest	1299408	-21	gpgv	20:00:01	0
1247062	99	25	19,4	cyclictest	1289116	-21	cat	19:50:01	3
1247058	99	25	19,5	cyclictest	509	-21	rs:main		2
1247058	99	25	18,5	cyclictest	1346783	-21	latency_hist	20:45:01	2
1247054	99	25	22,2	cyclictest	1545263	-21	kworker/u8:3+events_unbound	00:10:23	1
1247054	99	25	22,2	cyclictest	1466235	-21	kworker/u8:0+events_unbound	23:20:13	1
1247054	99	25	22,2	cyclictest	1425463	-21	kworker/u8:1+flush-259:0	22:05:25	1
1247054	99	25	22,2	cyclictest	1252173	-21	kworker/u8:4+flush-259:0	19:30:20	1
1247054	99	25	21,3	cyclictest	1377440	-21	kworker/u8:3+flush-259:0	21:50:15	1
1247054	99	25	21,2	cyclictest	1304643	-21	kworker/u8:4+flush-259:0	20:05:21	1
1247051	99	25	21,3	cyclictest	1472442	-21	kworker/u8:1+events_unbound	22:45:25	0
1247051	99	25	21,3	cyclictest	1304540	-21	kworker/u8:3+events_unbound	20:04:25	0
1247051	99	25	21,3	cyclictest	1267682	-21	kworker/u8:2+events_unbound	19:44:27	0
1247051	99	25	20,3	cyclictest	1545263	-21	kworker/u8:3+events_unbound	00:28:26	0
1247062	99	24	21,2	cyclictest	1441018	-21	kworker/u8:1+flush-259:0	22:30:18	3
1247062	99	24	1,21	cyclictest	1	-21	systemd	19:41:24	3
1247058	99	24	20,3	cyclictest	1425463	-21	kworker/u8:1+flush-259:0	22:05:24	2
1247058	99	24	17,5	cyclictest	335557	-21	systemd-journal	20:54:59	2
1247054	99	24	21,2	cyclictest	1570646	-21	kworker/u8:0+flush-259:0	00:30:21	1
1247054	99	24	21,2	cyclictest	1466235	-21	kworker/u8:0+flush-259:0	23:30:21	1
1247054	99	24	21,2	cyclictest	1362495	-21	kworker/u8:0+events_unbound	21:10:21	1
1247054	99	24	21,2	cyclictest	1321039	-21	kworker/u8:4+events_unbound	20:21:24	1
1247054	99	24	20,3	cyclictest	1310735	-21	apt-get	20:10:12	1
1247051	99	24	21,2	cyclictest	1425463	-21	kworker/u8:1+flush-259:0	22:05:23	0
1247051	99	24	20,3	cyclictest	1414465	-21	kworker/u8:4+events_unbound	23:10:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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