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 50 highest latencies:

System rackeslot4s.osadl.org (updated Fri Mar 27, 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
1119807	99	43	39,3	cyclictest	1235760	-21	kworker/u8:0+flush-259:0	09:05:00	0
1119812	99	37	30,5	cyclictest	252	-21	systemd-journal	10:05:00	1
1119819	99	36	31,4	cyclictest	1214675	-21	apt-get	08:40:11	2
1119807	99	36	33,2	cyclictest	1114213	-21	kworker/u8:3+events_unbound	07:55:14	0
1119822	99	35	30,3	cyclictest	1355029	-21	kworker/u8:4+flush-259:0	11:20:21	3
1119807	99	35	30,4	cyclictest	1349923	-21	apt-get	10:50:13	0
1119807	99	33	30,2	cyclictest	1291841	-21	kworker/u8:1+flush-259:0	10:10:25	0
1119807	99	33	30,2	cyclictest	1245491	-21	kworker/u8:3+events_unbound	09:40:23	0
1119807	99	32	29,2	cyclictest	2267822	-21	kworker/u8:2+flush-259:0	07:40:24	0
1119807	99	32	28,3	cyclictest	1187287	-21	kworker/u8:3+events_unbound	08:35:21	0
1119807	99	31	28,2	cyclictest	1338980	-21	kworker/u8:3+events_unbound	10:50:00	0
1119807	99	31	28,2	cyclictest	1235760	-21	kworker/u8:0+events_unbound	09:10:13	0
1119812	99	30	23,5	cyclictest	1338954	-21	latency_hist	10:40:01	1
1119807	99	30	27,2	cyclictest	1355029	-21	kworker/u8:4+events_unbound	11:10:20	0
1119807	99	30	26,3	cyclictest	1442853	-21	kworker/u8:1+flush-259:0	12:35:18	0
1119822	99	29	25,3	cyclictest	2267822	-21	kworker/u8:2+flush-259:0	07:45:21	3
1119822	99	28	22,4	cyclictest	1307647	-21	latency_hist	10:10:01	3
1119812	99	28	23,4	cyclictest	1266290	-21	/usr/sbin/munin	09:30:15	1
1119807	99	28	22,3	cyclictest	1235760	-21	kworker/u8:0+events_unbound	09:15:15	0
1119822	99	27	24,2	cyclictest	2267822	-21	kworker/u8:2+flush-259:0	07:55:00	3
1119822	99	27	23,3	cyclictest	1266075	-21	kworker/u8:2+flush-259:0	09:50:00	3
1119807	99	27	24,2	cyclictest	1421887	-21	kworker/u8:2+events_unbound	12:20:19	0
1119807	99	27	23,3	cyclictest	1442853	-21	kworker/u8:1+events_unbound	12:25:23	0
1119822	99	26	23,2	cyclictest	1390800	-21	kworker/u8:0+flush-259:0	11:45:24	3
1119822	99	26	23,2	cyclictest	1235760	-21	kworker/u8:0+flush-259:0	09:10:17	3
1119822	99	26	17,3	cyclictest	1338980	-21	kworker/u8:3+flush-259:0	10:55:00	3
1119807	99	26	23,2	cyclictest	1411203	-21	kworker/u8:1+flush-259:0	12:00:24	0
1119807	99	26	23,2	cyclictest	1291841	-21	kworker/u8:1+events_unbound	10:40:12	0
1119807	99	26	22,3	cyclictest	1198523	-21	kworker/u8:1+events_unbound	08:40:21	0
1119807	99	26	21,4	cyclictest	1135967	-21	apt-get	07:25:12	0
1119807	99	26	18,2	cyclictest	1353897	-21	kworker/u8:0+events_unbound	10:55:23	0
1119822	99	25	22,2	cyclictest	1421887	-21	kworker/u8:2+events_unbound	12:25:14	3
1119822	99	25	21,3	cyclictest	1344302	-21	kworker/u8:2+flush-259:0	10:45:15	3
1119822	99	25	21,3	cyclictest	1266075	-21	kworker/u8:2+flush-259:0	09:50:15	3
1119822	99	25	21,3	cyclictest	1266075	-21	kworker/u8:2+flush-259:0	09:50:15	3
1119819	99	25	21,3	cyclictest	1245491	-21	kworker/u8:3+flush-259:0	09:40:16	2
1119819	99	25	20,3	cyclictest	1448256	-21	apt-get	12:25:12	2
1119812	99	25	20,3	cyclictest	1119811	-21	latency_hist	07:10:00	1
1119807	99	25	22,2	cyclictest	1344302	-21	kworker/u8:2+events_unbound	11:15:20	0
1119807	99	25	22,2	cyclictest	1323476	-21	kworker/u8:0+events_unbound	10:35:17	0
1119807	99	25	22,2	cyclictest	1260657	-21	kworker/u8:1+flush-259:0	09:45:15	0
1119807	99	25	22,2	cyclictest	1187287	-21	kworker/u8:3+events_unbound	08:30:24	0
1119807	99	25	20,4	cyclictest	1390913	-21	latency_hist	11:30:00	0
1119819	99	24	20,3	cyclictest	1411203	-21	kworker/u8:1+flush-259:0	12:05:14	2
1119819	99	24	19,3	cyclictest	1260855	-21	awk	09:25:00	2
1119812	99	24	20,3	cyclictest	1209511	-21	apt-get	08:35:11	1
1119807	99	24	21,2	cyclictest	1266075	-21	kworker/u8:2+flush-259:0	09:55:15	0
1119807	99	24	21,2	cyclictest	1266075	-21	kworker/u8:2+flush-259:0	09:55:14	0
1119807	99	24	21,2	cyclictest	1235760	-21	kworker/u8:0+events_unbound	09:20:20	0
1119807	99	24	21,2	cyclictest	1081501	-21	kworker/u8:1+events_unbound	07:10:18	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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