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 Tue Jun 30, 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
3882770	99	48	45,2	cyclictest	4053811	-21	kworker/u8:1+flush-259:0	22:00:00	3
3882760	99	46	42,2	cyclictest	21	1	rcuc/0	22:40:00	0
3882770	99	45	42,2	cyclictest	4099776	-21	kworker/u8:3+flush-259:0	22:45:00	3
3882765	99	43	40,2	cyclictest	3903384	-21	kworker/u8:0+flush-259:0	20:00:01	2
3882770	99	40	35,3	cyclictest	335557	-21	systemd-journal	22:25:41	3
3882760	99	38	32,4	cyclictest	335557	-21	systemd-journal	00:25:01	0
3882760	99	37	33,3	cyclictest	4183415	-21	latency_hist	00:00:01	0
3882770	99	36	32,3	cyclictest	4147380	-21	latency_hist	23:25:01	3
3882770	99	36	32,3	cyclictest	4137081	-21	kworker/u8:3+flush-259:0	23:40:15	3
3882760	99	36	30,4	cyclictest	335557	-21	systemd-journal	22:34:59	0
3882760	99	36	29,5	cyclictest	4052877	-21	ntpq	21:50:22	0
3882770	99	35	29,4	cyclictest	335557	-21	systemd-journal	21:00:01	3
3882770	99	35	29,4	cyclictest	335557	-21	systemd-journal	21:00:00	3
3882762	99	35	0,34	cyclictest	1	-21	systemd	22:34:59	1
3882770	99	34	29,4	cyclictest	3965855	-21	kworker/u8:0+flush-259:0	21:55:00	3
3882765	99	34	28,4	cyclictest	4032932	-21	cp	21:35:01	2
3882770	99	33	30,2	cyclictest	4147407	-21	kworker/u8:1+flush-259:0	23:25:17	3
3882765	99	33	26,5	cyclictest	4069	-21	ntpq	00:10:23	2
3882770	99	32	29,2	cyclictest	3913920	-21	kworker/u8:3+flush-259:0	20:15:11	3
3882770	99	32	28,3	cyclictest	3960643	-21	kworker/u8:1+events_unbound	20:40:00	3
3882765	99	32	29,2	cyclictest	3965855	-21	kworker/u8:0+flush-259:0	21:45:16	2
3882762	99	31	27,3	cyclictest	3913920	-21	kworker/u8:3+flush-259:0	19:45:15	1
3882762	99	31	26,3	cyclictest	3966069	-21	/usr/sbin/munin	20:30:14	1
3882762	99	31	23,5	cyclictest	4043507	-21	latency_hist	21:45:02	1
3882770	99	30	26,3	cyclictest	3893267	-21	kworker/u8:2+events_unbound	19:25:19	3
3882770	99	30	25,4	cyclictest	3960680	-21	latency_hist	20:25:00	3
3882765	99	30	27,2	cyclictest	827180	-21	kworker/u8:1+flush-259:0	19:20:17	2
3882765	99	30	26,3	cyclictest	3913920	-21	kworker/u8:3+events_unbound	19:55:01	2
3882765	99	30	25,4	cyclictest	4147407	-21	kworker/u8:1+events_unbound	23:35:24	2
3882765	99	30	25,3	cyclictest	4183650	-21	/usr/sbin/munin	00:00:13	2
3882765	99	30	24,4	cyclictest	4089835	-21	latency_hist	22:30:01	2
3882762	99	30	23,4	cyclictest	335557	-21	systemd-journal	19:40:00	1
3882765	99	29	26,2	cyclictest	3872134	-21	kworker/u8:0+flush-259:0	19:10:17	2
3882765	99	29	25,3	cyclictest	4147407	-21	kworker/u8:1+flush-259:0	23:30:15	2
3882762	99	29	24,3	cyclictest	3924240	-21	kworker/u8:1+flush-259:0	20:05:01	1
3882760	99	29	22,5	cyclictest	3939109	-21	ntpq	20:00:23	0
3882770	99	28	24,3	cyclictest	3913920	-21	kworker/u8:3+events_unbound	19:55:15	3
3882765	99	28	24,3	cyclictest	4048533	-21	kworker/u8:2+events_unbound	22:36:42	2
3882765	99	28	24,3	cyclictest	3986886	-21	kworker/u8:2+flush-259:0	20:50:42	2
3882765	99	28	24,3	cyclictest	3913920	-21	kworker/u8:3+flush-259:0	19:40:15	2
3882762	99	28	24,3	cyclictest	3960643	-21	kworker/u8:1+events_unbound	21:20:17	1
3882762	99	28	23,4	cyclictest	4099776	-21	kworker/u8:3+flush-259:0	22:49:59	1
3882760	99	28	21,5	cyclictest	4048655	-21	latency_hist	21:50:01	0
3882765	99	27	24,2	cyclictest	4048533	-21	kworker/u8:2+flush-259:0	23:20:25	2
3882765	99	27	23,3	cyclictest	3950301	-21	kworker/u8:2+events_unbound	20:15:00	2
3882762	99	27	20,5	cyclictest	4047780	-21	ntpq	21:45:21	1
3882760	99	27	23,3	cyclictest	4100403	-21	apt-get	22:40:12	0
3882760	99	27	19,5	cyclictest	4178276	-21	latency_hist	23:55:00	0
3882770	99	26	23,2	cyclictest	4173133	-21	kworker/u8:4+events_unbound	00:10:40	3
3882765	99	26	22,3	cyclictest	3913920	-21	kworker/u8:3+events_unbound	20:25:19	2
3882762	99	26	19,4	cyclictest	4162822	-21	latency_hist	23:40:00	1
3882760	99	26	20,5	cyclictest	3918869	-21	latency_hist	19:45:01	0
3882760	99	26	20,4	cyclictest	4167118	-21	ntpq	23:40:21	0
3882770	99	25	22,3	cyclictest	4012160	-21	kworker/u8:4+flush-259:0	21:25:41	3
3882770	99	25	21,3	cyclictest	4147407	-21	kworker/u8:1+events_unbound	23:33:40	3
3882770	99	25	21,3	cyclictest	4012160	-21	kworker/u8:4+flush-259:0	21:22:40	3
3882770	99	25	20,4	cyclictest	3882691	-21	latency_hist	19:10:01	3
3882762	99	25	21,3	cyclictest	4048533	-21	kworker/u8:2+flush-259:0	22:59:59	1
3882760	99	25	20,3	cyclictest	3960643	-21	kworker/u8:1+flush-259:0	21:05:00	0
3882770	99	24	19,4	cyclictest	335557	-21	systemd-journal	00:30:00	3
3882762	99	24	19,3	cyclictest	3902500	-21	ntpq	19:25:22	1
3882760	99	24	21,2	cyclictest	3965855	-21	kworker/u8:0+flush-259:0	21:55:25	0
3882760	99	24	17,5	cyclictest	4083851	-21	ntpq	22:20:20	0
3882770	99	23	21,2	cyclictest	4173132	-21	kworker/u8:2+events_unbound	00:15:41	3
3882770	99	23	20,2	cyclictest	4053811	-21	kworker/u8:1+flush-259:0	22:35:24	3
3882770	99	23	20,2	cyclictest	4048533	-21	kworker/u8:2+flush-259:0	23:00:18	3
3882765	99	23	20,2	cyclictest	4173132	-21	kworker/u8:2+flush-259:0	00:30:25	2
3882765	99	23	20,2	cyclictest	4053811	-21	kworker/u8:1+events_unbound	22:20:11	2
3882765	99	23	19,3	cyclictest	4115652	-21	kworker/u8:0+events_unbound	23:12:42	2
3882765	99	23	19,3	cyclictest	3960643	-21	kworker/u8:1+events_unbound	20:56:42	2
3882765	99	23	19,3	cyclictest	3960643	-21	kworker/u8:1+events_unbound	20:56:42	2
3882765	99	23	18,4	cyclictest	335557	-21	systemd-journal	21:30:00	2
3882765	99	23	17,4	cyclictest	4007030	-21	latency_hist	21:10:00	2
3882762	99	23	19,3	cyclictest	3882985	-21	apt-get	19:10:12	1
3882760	99	23	17,4	cyclictest	4142252	-21	latency_hist	23:20:01	0
3882770	99	22	19,2	cyclictest	4137081	-21	kworker/u8:3+events_unbound	23:45:24	3
3882770	99	22	18,3	cyclictest	4053811	-21	kworker/u8:1+events_unbound	22:15:18	3
3882770	99	22	18,3	cyclictest	3883270	-21	kworker/u8:3+flush-259:0	19:10:41	3
3882770	99	22	16,4	cyclictest	4115624	-21	latency_hist	22:55:00	3
3882765	99	22	18,3	cyclictest	4173132	-21	kworker/u8:2+flush-259:0	00:30:01	2
3882765	99	22	18,3	cyclictest	4147407	-21	kworker/u8:1+events_unbound	23:25:12	2
3882765	99	22	18,3	cyclictest	4137081	-21	kworker/u8:3+events_unbound	23:42:14	2
3882765	99	22	18,3	cyclictest	3965855	-21	kworker/u8:0+events_unbound	21:19:42	2
3882762	99	22	17,3	cyclictest	509	-21	rs:main		1
3882762	99	22	17,3	cyclictest	4032749	-21	latency_hist	21:35:00	1
3882762	99	22	16,4	cyclictest	4054027	-21	/usr/sbin/munin	21:55:16	1
3882762	99	22	16,4	cyclictest	15485	-21	/usr/sbin/munin	00:25:14	1
3882760	99	22	19,2	cyclictest	3913920	-21	kworker/u8:3+flush-259:0	19:50:00	0
3882760	99	22	18,3	cyclictest	4053811	-21	kworker/u8:1+events_unbound	22:25:22	0
3882770	99	21	18,2	cyclictest	827180	-21	kworker/u8:1+flush-259:0	19:35:24	3
3882770	99	21	18,2	cyclictest	3913920	-21	kworker/u8:3+flush-259:0	20:00:20	3
3882770	99	21	17,3	cyclictest	4163050	-21	kworker/u8:0+events_unbound	23:50:23	3
3882765	99	21	19,1	cyclictest	3913920	-21	kworker/u8:3+events_unbound	20:00:17	2
3882765	99	21	18,2	cyclictest	4099776	-21	kworker/u8:3+flush-259:0	22:45:10	2
3882765	99	21	18,2	cyclictest	4048533	-21	kworker/u8:2+events_unbound	23:00:22	2
3882765	99	21	18,2	cyclictest	4048533	-21	kworker/u8:2+events_unbound	22:55:22	2
3882765	99	21	17,3	cyclictest	4188789	-21	kworker/u8:3+events_unbound	00:05:39	2
3882765	99	21	17,3	cyclictest	3960643	-21	kworker/u8:1+flush-259:0	20:40:20	2
3882765	99	21	16,4	cyclictest	4110727	-21	apt-get	22:50:14	2
3882762	99	21	14,4	cyclictest	4002103	-21	/usr/sbin/munin	21:05:14	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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