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 Apr 01, 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
366363	99	41	37,3	cyclictest	599558	-21	kworker/u8:0+flush-259:0	12:35:20	0
366363	99	40	36,3	cyclictest	661985	-21	kworker/u8:2+flush-259:0	12:00:21	0
366363	99	39	36,2	cyclictest	599558	-21	kworker/u8:0+flush-259:0	11:20:25	0
366363	99	38	35,2	cyclictest	677214	-21	kworker/u8:3+flush-259:0	12:20:25	0
366363	99	38	35,2	cyclictest	366562	-21	kworker/u8:3+flush-259:0	07:50:19	0
366363	99	38	32,4	cyclictest	449363	-21	latency_hist	08:30:01	0
366369	99	37	33,3	cyclictest	376642	-21	apt-get	07:20:01	2
366365	99	37	33,3	cyclictest	485860	-21	kworker/u8:1+flush-259:0	10:10:23	1
366365	99	37	31,4	cyclictest	474598	-21	ntpq	08:50:20	1
366363	99	37	30,5	cyclictest	608956	-21	ntpq	11:00:22	0
366365	99	36	32,3	cyclictest	615229	-21	kworker/u8:3+flush-259:0	11:50:19	1
366363	99	36	32,3	cyclictest	599558	-21	kworker/u8:0+flush-259:0	11:35:21	0
366363	99	36	32,2	cyclictest	584165	-21	kworker/u8:3+events_unbound	10:45:15	0
366363	99	36	32,2	cyclictest	584165	-21	kworker/u8:3+events_unbound	10:45:15	0
366373	99	34	29,4	cyclictest	563241	-21	kworker/u8:2+flush-259:0	10:25:26	3
366363	99	34	30,3	cyclictest	573890	-21	kworker/u8:1+flush-259:0	11:00:00	0
366363	99	34	30,3	cyclictest	449400	-21	kworker/u8:3+events_unbound	08:30:21	0
366373	99	33	27,4	cyclictest	543032	-21	latency_hist	10:00:00	3
366369	99	33	28,4	cyclictest	708400	-21	cat	12:40:00	2
366365	99	33	30,2	cyclictest	377152	-21	base64	07:20:01	1
366365	99	33	29,3	cyclictest	522202	-21	kworker/u8:0+flush-259:0	09:50:17	1
366363	99	33	29,3	cyclictest	656828	-21	apt-get	11:50:12	0
366363	99	33	28,3	cyclictest	403138	-21	/usr/sbin/munin	07:45:23	0
366369	99	32	29,2	cyclictest	485860	-21	kworker/u8:1+flush-259:0	09:15:21	2
366365	99	32	28,3	cyclictest	677215	-21	kworker/u8:4+flush-259:0	12:15:01	1
366363	99	32	26,4	cyclictest	428970	-21	/usr/sbin/munin	08:10:13	0
366365	99	31	28,2	cyclictest	574130	-21	apt-get	10:30:11	1
366365	99	31	27,3	cyclictest	594637	-21	/usr/sbin/munin	10:50:13	1
366363	99	31	28,2	cyclictest	651187	-21	kworker/u8:1+flush-259:0	12:05:24	0
366363	99	31	27,3	cyclictest	387657	-21	/usr/sbin/munin	07:30:15	0
366369	99	30	24,4	cyclictest	252	-21	systemd-journal	08:55:01	2
366365	99	30	25,3	cyclictest	252	-21	systemd-journal	11:42:15	1
366363	99	30	26,3	cyclictest	677214	-21	kworker/u8:3+flush-259:0	12:15:17	0
366363	99	30	26,3	cyclictest	522202	-21	kworker/u8:0+flush-259:0	10:14:59	0
366363	99	30	26,3	cyclictest	350968	-21	kworker/u8:0+events_unbound	09:05:20	0
366363	99	30	22,3	cyclictest	350968	-21	kworker/u8:0+events_unbound	07:40:23	0
366373	99	29	23,4	cyclictest	423579	-21	latency_hist	08:05:01	3
366363	99	29	26,2	cyclictest	522202	-21	kworker/u8:0+events_unbound	10:00:16	0
366369	99	28	25,2	cyclictest	382471	-21	kworker/u8:4+flush-259:0	07:39:59	2
366369	99	28	24,3	cyclictest	413458	-21	kworker/u8:2+flush-259:0	08:04:59	2
366369	99	28	23,4	cyclictest	465394	-21	kworker/u8:2+flush-259:0	09:10:25	2
366363	99	28	24,3	cyclictest	507975	-21	kworker/u8:0+flush-259:0	09:25:24	0
366363	99	28	24,3	cyclictest	449400	-21	kworker/u8:3+flush-259:0	08:50:23	0
366365	99	27	22,3	cyclictest	252	-21	systemd-journal	07:33:03	1
366363	99	27	24,2	cyclictest	599558	-21	kworker/u8:0+flush-259:0	11:05:19	0
366363	99	27	24,2	cyclictest	573890	-21	kworker/u8:1+flush-259:0	11:15:10	0
366363	99	27	24,2	cyclictest	522202	-21	kworker/u8:0+flush-259:0	09:45:25	0
366363	99	27	24,2	cyclictest	350968	-21	kworker/u8:0+flush-259:0	08:15:25	0
366363	99	27	23,2	cyclictest	413458	-21	kworker/u8:2+events_unbound	07:55:22	0
366363	99	27	19,6	cyclictest	459628	-21	latency_hist	08:40:00	0
366373	99	26	23,2	cyclictest	382471	-21	kworker/u8:4+flush-259:0	07:35:26	3
366369	99	26	22,3	cyclictest	382471	-21	kworker/u8:4+flush-259:0	08:05:17	2
366369	99	26	22,3	cyclictest	252	-21	systemd-journal	11:53:37	2
366365	99	26	22,3	cyclictest	573890	-21	kworker/u8:1+flush-259:0	11:15:26	1
366365	99	26	22,3	cyclictest	522202	-21	kworker/u8:0+flush-259:0	10:40:18	1
366363	99	26	22,3	cyclictest	615229	-21	kworker/u8:3+flush-259:0	11:30:16	0
366363	99	26	22,3	cyclictest	522202	-21	kworker/u8:0+flush-259:0	10:40:16	0
366363	99	26	22,3	cyclictest	507975	-21	kworker/u8:0+events_unbound	09:30:20	0
366363	99	26	22,3	cyclictest	485860	-21	kworker/u8:1+events_unbound	09:40:20	0
366363	99	26	20,4	cyclictest	662179	-21	diskstats	11:55:16	0
366363	99	26	19,5	cyclictest	366297	-21	latency_hist	07:10:01	0
366373	99	25	20,4	cyclictest	366757	-21	diskstats	07:10:14	3
366369	99	25	21,3	cyclictest	615229	-21	kworker/u8:3+flush-259:0	11:45:01	2
366363	99	25	22,2	cyclictest	522202	-21	kworker/u8:0+flush-259:0	10:35:19	0
366373	99	24	20,3	cyclictest	692969	-21	apt-get	12:25:12	3
366373	99	24	20,3	cyclictest	573890	-21	kworker/u8:1+flush-259:0	11:10:23	3
366373	99	24	18,4	cyclictest	418424	-21	latency_hist	08:00:00	3
366373	99	24	18,4	cyclictest	413226	-21	latency_hist	07:55:00	3
366365	99	24	20,3	cyclictest	615229	-21	kworker/u8:3+flush-259:0	11:35:00	1
366365	99	24	20,3	cyclictest	604964	-21	apt-get	11:00:12	1
366363	99	24	20,3	cyclictest	449400	-21	kworker/u8:3+flush-259:0	08:40:16	0
366363	99	24	19,2	cyclictest	563241	-21	kworker/u8:2+events_unbound	10:25:24	0
366373	99	23	19,3	cyclictest	708237	-21	latency_hist	12:40:00	3
366373	99	23	19,3	cyclictest	449622	-21	apt-get	08:30:12	3
366369	99	23	20,2	cyclictest	350968	-21	kworker/u8:0+flush-259:0	08:29:59	2
366369	99	23	18,4	cyclictest	594175	-21	kworker/u8:2+flush-259:0	11:05:00	2
366365	99	23	20,2	cyclictest	651187	-21	kworker/u8:1+flush-259:0	11:55:18	1
366365	99	23	20,2	cyclictest	625303	-21	kworker/u8:2+events_unbound	11:25:20	1
366365	99	23	18,4	cyclictest	661985	-21	kworker/u8:2+flush-259:0	12:00:11	1
366365	99	23	17,3	cyclictest	449400	-21	kworker/u8:3+events_unbound	08:35:18	1
366363	99	23	20,2	cyclictest	563241	-21	kworker/u8:2+events_unbound	10:30:26	0
366363	99	23	17,4	cyclictest	387418	-21	latency_hist	07:30:02	0
366369	99	22	18,3	cyclictest	485860	-21	kworker/u8:1+flush-259:0	10:00:25	2
366369	99	22	18,3	cyclictest	485564	-21	apt-get	09:02:20	2
366369	99	22	0,21	cyclictest	666917	-21	munin-run	12:00:00	2
366365	99	22	18,3	cyclictest	677214	-21	kworker/u8:3+flush-259:0	12:15:16	1
366365	99	22	18,3	cyclictest	465394	-21	kworker/u8:2+flush-259:0	09:00:20	1
366365	99	22	18,3	cyclictest	350968	-21	kworker/u8:0+flush-259:0	08:30:26	1
366365	99	22	16,4	cyclictest	599803	-21	apt-get	10:55:12	1
366365	99	22	16,4	cyclictest	485860	-21	kworker/u8:1+flush-259:0	10:15:15	1
366363	99	22	19,2	cyclictest	485860	-21	kworker/u8:1+events_unbound	10:07:31	0
366363	99	22	18,3	cyclictest	677214	-21	kworker/u8:3+events_unbound	12:25:24	0
366363	99	22	17,3	cyclictest	485860	-21	kworker/u8:1+flush-259:0	09:15:17	0
366373	99	21	18,1	cyclictest	465394	-21	kworker/u8:2+flush-259:0	09:00:00	3
366373	99	21	16,3	cyclictest	509	-21	rs:main		3
366373	99	21	15,5	cyclictest	469489	-21	ntpq	08:45:22	3
366369	99	21	18,2	cyclictest	599558	-21	kworker/u8:0+events_unbound	11:15:21	2
366369	99	21	18,2	cyclictest	563241	-21	kworker/u8:2+flush-259:0	10:20:26	2
366369	99	21	18,2	cyclictest	522202	-21	kworker/u8:0+flush-259:0	10:40:25	2
366369	99	21	18,2	cyclictest	413458	-21	kworker/u8:2+flush-259:0	07:55:26	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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