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 Sat Nov 22, 2025 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
222875	99	41	35,4	cyclictest	456433	-21	kworker/u8:2+flush-259:0	23:20:00	0
222883	99	40	36,3	cyclictest	301100	-21	kworker/u8:4+flush-259:0	20:30:00	2
222883	99	38	35,3	cyclictest	238359	-21	kworker/u8:0+flush-259:0	19:45:00	2
222875	99	36	31,3	cyclictest	263864	-21	kworker/u8:3+flush-259:0	20:49:59	0
222886	99	35	30,4	cyclictest	399418	-21	latency_hist	22:00:01	3
222878	99	35	29,4	cyclictest	508053	-21	/usr/sbin/munin	23:45:15	1
222878	99	35	29,4	cyclictest	368540	-21	latency_hist	21:30:01	1
222878	99	35	29,4	cyclictest	368540	-21	latency_hist	21:30:01	1
222883	99	34	31,2	cyclictest	378854	-21	kworker/u8:3+events_unbound	21:45:15	2
222878	99	34	28,4	cyclictest	420701	-21	/usr/sbin/munin	22:20:13	1
222875	99	33	27,5	cyclictest	2698871	-21	systemd-journal	23:30:00	0
222886	99	32	28,3	cyclictest	280006	-21	apt-get	20:05:03	3
222883	99	32	29,2	cyclictest	222825	-21	kworker/u8:3+events_unbound	19:15:25	2
222875	99	31	27,3	cyclictest	544441	-21	kworker/u8:4+flush-259:0	00:40:00	0
222883	99	30	27,2	cyclictest	332227	-21	kworker/u8:2+flush-259:0	21:25:25	2
222883	99	30	27,2	cyclictest	332227	-21	kworker/u8:2+flush-259:0	21:25:24	2
222883	99	30	26,3	cyclictest	311686	-21	/usr/sbin/munin	20:35:16	2
222883	99	30	26,3	cyclictest	3000063	-21	rs:main		2
222878	99	30	24,4	cyclictest	435883	-21	latency_hist	22:35:01	1
222875	99	30	26,3	cyclictest	347692	-21	kworker/u8:0+flush-259:0	22:35:26	0
222883	99	28	22,5	cyclictest	222790	-21	latency_hist	19:10:01	2
222875	99	28	21,5	cyclictest	320821	-21	ntpq	20:40:19	0
222886	99	27	22,3	cyclictest	456433	-21	kworker/u8:2+flush-259:0	23:35:25	3
222883	99	27	22,3	cyclictest	477199	-21	/usr/sbin/munin	23:15:14	2
222875	99	27	20,5	cyclictest	310547	-21	ntpq	20:30:20	0
222886	99	26	23,2	cyclictest	189541	-21	kworker/u8:2+flush-259:0	19:20:15	3
222878	99	26	19,4	cyclictest	389114	-21	latency_hist	21:50:00	1
222886	99	25	22,2	cyclictest	263864	-21	kworker/u8:3+flush-259:0	20:30:25	3
222886	99	25	21,3	cyclictest	435896	-21	kworker/u8:3+flush-259:0	22:50:01	3
222886	99	25	21,3	cyclictest	347692	-21	kworker/u8:0+events_unbound	22:35:25	3
222886	99	25	20,4	cyclictest	269278	-21	latency_hist	19:55:01	3
222883	99	25	22,2	cyclictest	263864	-21	kworker/u8:3+flush-259:0	20:15:00	2
222883	99	25	21,3	cyclictest	332017	-21	kworker/u8:1+events_unbound	21:30:14	2
222875	99	25	20,4	cyclictest	232624	-21	kworker/u8:4+flush-259:0	19:35:01	0
222886	99	24	21,2	cyclictest	347692	-21	kworker/u8:0+flush-259:0	22:30:20	3
222886	99	24	20,3	cyclictest	523257	-21	kworker/u8:1+flush-259:0	00:05:25	3
222886	99	24	20,3	cyclictest	189541	-21	kworker/u8:2+flush-259:0	19:20:00	3
222883	99	24	22,2	cyclictest	212258	-21	kworker/u8:1+flush-259:0	19:15:01	2
222883	99	24	21,2	cyclictest	332017	-21	kworker/u8:1+flush-259:0	21:40:21	2
222883	99	24	18,4	cyclictest	2698871	-21	systemd-journal	20:00:00	2
222878	99	24	22,1	cyclictest	399432	-21	kworker/u8:3+flush-259:0	22:10:00	1
222886	99	23	19,3	cyclictest	290774	-21	kworker/u8:0+events_unbound	20:17:01	3
222886	99	23	18,4	cyclictest	564828	-21	latency_hist	00:40:01	3
222883	99	23	18,3	cyclictest	543288	-21	ntpq	00:15:23	2
222878	99	23	17,4	cyclictest	2698871	-21	systemd-journal	21:32:24	1
222883	99	22	18,3	cyclictest	456433	-21	kworker/u8:2+flush-259:0	23:45:16	2
222883	99	22	18,3	cyclictest	399432	-21	kworker/u8:3+events_unbound	22:11:26	2
222883	99	22	15,5	cyclictest	2698871	-21	systemd-journal	22:40:01	2
222878	99	22	17,3	cyclictest	189541	-21	kworker/u8:2+events_unbound	20:20:01	1
222886	99	21	18,2	cyclictest	290774	-21	kworker/u8:0+events_unbound	20:40:22	3
222886	99	21	18,2	cyclictest	189541	-21	kworker/u8:2+events_unbound	20:00:16	3
222886	99	21	17,3	cyclictest	332227	-21	kworker/u8:2+events_unbound	21:35:20	3
222886	99	21	17,3	cyclictest	2698871	-21	systemd-journal	20:51:15	3
222883	99	21	7,3	cyclictest	301100	-21	kworker/u8:4+events_unbound	20:50:20	2
222883	99	21	18,2	cyclictest	456433	-21	kworker/u8:2+events_unbound	23:20:22	2
222883	99	21	18,2	cyclictest	232624	-21	kworker/u8:4+flush-259:0	19:25:18	2
222875	99	21	17,3	cyclictest	189541	-21	kworker/u8:2+flush-259:0	20:15:21	0
222875	99	21	15,4	cyclictest	456433	-21	kworker/u8:2+flush-259:0	23:30:17	0
222875	99	21	15,4	cyclictest	341485	-21	ntpq	21:00:22	0
222875	99	21	14,5	cyclictest	456415	-21	latency_hist	22:55:00	0
222875	99	21	14,5	cyclictest	238338	-21	latency_hist	19:25:01	0
222875	99	21	0,19	cyclictest	3000063	-21	rs:main		0
222886	99	20	17,2	cyclictest	435896	-21	kworker/u8:3+events_unbound	23:10:19	3
222886	99	20	16,3	cyclictest	347692	-21	kworker/u8:0+events_unbound	21:50:23	3
222886	99	20	13,5	cyclictest	445247	-21	ntpq	22:40:21	3
222883	99	20	17,2	cyclictest	399432	-21	kworker/u8:3+events_unbound	22:04:56	2
222883	99	20	17,2	cyclictest	290774	-21	kworker/u8:0+events_unbound	20:16:23	2
222883	99	20	17,2	cyclictest	238359	-21	kworker/u8:0+events_unbound	19:35:14	2
222883	99	20	16,3	cyclictest	472036	-21	kworker/u8:1+events_unbound	23:14:56	2
222883	99	20	16,3	cyclictest	2698871	-21	systemd-journal	21:35:00	2
222878	99	20	16,3	cyclictest	493075	-21	irqcore	23:30:16	1
222878	99	20	16,3	cyclictest	435896	-21	kworker/u8:3+flush-259:0	23:09:54	1
222878	99	20	16,3	cyclictest	248848	-21	/usr/sbin/munin	19:35:22	1
222878	99	20	1,5	cyclictest	518097	-21	cron	23:55:00	1
222878	99	20	14,4	cyclictest	2698871	-21	systemd-journal	20:30:01	1
222875	99	20	14,4	cyclictest	533950	-21	kworker/u8:2+flush-259:0	00:15:01	0
222875	99	20	12,5	cyclictest	549376	-21	latency_hist	00:25:01	0
222886	99	19	16,2	cyclictest	435896	-21	kworker/u8:3+events_unbound	23:40:24	3
222886	99	19	16,2	cyclictest	263864	-21	kworker/u8:3+events_unbound	20:25:22	3
222883	99	19	16,2	cyclictest	263864	-21	kworker/u8:3+flush-259:0	19:50:26	2
222883	99	19	16,2	cyclictest	0	-21	swapper/2	19:50:00	2
222883	99	19	13,4	cyclictest	280642	-21	cp	20:05:02	2
222878	99	19	7,4	cyclictest	497848	-21	apt-get	23:35:12	1
222878	99	19	5,2	cyclictest	539074	-21	awk	00:15:00	1
222878	99	19	14,4	cyclictest	456433	-21	kworker/u8:2+flush-259:0	23:25:00	1
222875	99	19	13,4	cyclictest	533912	-21	latency_hist	00:10:01	0
222886	99	18	15,3	cyclictest	332227	-21	kworker/u8:2+events_unbound	20:55:20	3
222886	99	18	15,2	cyclictest	399645	-21	kworker/u8:4+events_unbound	22:14:25	3
222886	99	18	15,2	cyclictest	232624	-21	kworker/u8:4+events_unbound	19:25:23	3
222886	99	18	14,3	cyclictest	435896	-21	kworker/u8:3+events_unbound	23:02:26	3
222886	99	18	14,3	cyclictest	353255	-21	kworker/u8:4+events_unbound	21:20:15	3
222886	99	18	14,3	cyclictest	263864	-21	kworker/u8:3+events_unbound	20:20:19	3
222883	99	18	15,2	cyclictest	290774	-21	kworker/u8:0+events_unbound	20:21:12	2
222883	99	18	14,3	cyclictest	523257	-21	kworker/u8:1+flush-259:0	00:10:19	2
222883	99	18	14,3	cyclictest	347692	-21	kworker/u8:0+events_unbound	22:24:56	2
222883	99	18	14,3	cyclictest	332227	-21	kworker/u8:2+events_unbound	20:56:18	2
222883	99	18	12,5	cyclictest	2698871	-21	systemd-journal	21:10:00	2
222883	99	18	12,4	cyclictest	528766	-21	cp	00:05:01	2
222878	99	18	7,1	cyclictest	0	-21	swapper/1	20:30:17	1
222878	99	18	1,5	cyclictest	404574	-21	awk	22:04:59	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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