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 Mon Feb 02, 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
3558633	99	46	40,4	cyclictest	3726011	-21	latency_hist	21:59:59	3
3558623	99	46	38,5	cyclictest	3756876	-21	latency_hist	22:30:01	0
3558628	99	42	39,2	cyclictest	3860380	-21	kworker/u8:1+events_unbound	00:39:04	2
3558628	99	42	35,5	cyclictest	3844913	-21	latency_hist	23:55:01	2
3558623	99	42	39,2	cyclictest	3667676	-21	kworker/u8:4+flush-259:0	21:05:01	0
3558633	99	39	35,3	cyclictest	3772549	-21	/usr/sbin/munin	22:45:13	3
3558623	99	39	35,3	cyclictest	3599819	-21	kworker/u8:0+flush-259:0	19:50:17	0
3558623	99	38	34,2	cyclictest	3736329	-21	kworker/u8:2+flush-259:0	22:25:00	0
3558623	99	37	33,3	cyclictest	3860380	-21	kworker/u8:1+flush-259:0	00:20:15	0
3558623	99	36	32,3	cyclictest	3620889	-21	kworker/u8:3+flush-259:0	20:45:00	0
3558628	99	35	32,2	cyclictest	3647077	-21	kworker/u8:1+events_unbound	21:16:23	2
3558623	99	35	31,3	cyclictest	3746637	-21	kworker/u8:1+flush-259:0	22:30:14	0
3558623	99	35	31,3	cyclictest	3599819	-21	kworker/u8:0+events_unbound	20:10:14	0
3558633	99	34	29,3	cyclictest	3824298	-21	latency_hist	23:35:01	3
3558628	99	34	30,3	cyclictest	3746637	-21	kworker/u8:1+events_unbound	22:43:22	2
3558628	99	34	30,3	cyclictest	3746637	-21	kworker/u8:1+events_unbound	22:43:22	2
3558623	99	34	30,3	cyclictest	3667676	-21	kworker/u8:4+flush-259:0	22:45:21	0
3558623	99	34	28,4	cyclictest	252	-21	systemd-journal	19:24:19	0
3558628	99	33	31,2	cyclictest	3563682	-21	kworker/u8:0+events_unbound	19:15:27	2
3558628	99	33	28,3	cyclictest	3876103	-21	/usr/sbin/munin	00:25:15	2
3558623	99	33	29,3	cyclictest	3563682	-21	kworker/u8:0+flush-259:0	19:40:17	0
3558623	99	33	27,4	cyclictest	3792097	-21	ntpq	23:00:22	0
3558625	99	32	25,5	cyclictest	3885320	-21	ntpq	00:30:23	1
3558623	99	32	28,3	cyclictest	3777489	-21	kworker/u8:3+events_unbound	22:50:13	0
3558623	99	31	26,4	cyclictest	3667676	-21	kworker/u8:4+events_unbound	21:25:21	0
3558628	99	30	25,4	cyclictest	3798106	-21	kworker/u8:2+flush-259:0	23:25:17	2
3558628	99	30	23,5	cyclictest	3798082	-21	latency_hist	23:10:01	2
3558628	99	30	23,5	cyclictest	3720205	-21	latency_hist	21:50:01	2
3558628	99	30	23,5	cyclictest	3610361	-21	cat	20:00:01	2
3558625	99	30	25,3	cyclictest	3803484	-21	apt-get	23:15:11	1
3558625	99	30	24,4	cyclictest	3782678	-21	latency_hist	22:55:01	1
3558623	99	30	25,3	cyclictest	3813033	-21	kworker/u8:0+flush-259:0	23:30:21	0
3558623	99	30	23,5	cyclictest	509	-21	rs:main		0
3558623	99	29	25,3	cyclictest	3798106	-21	kworker/u8:2+flush-259:0	00:05:20	0
3558623	99	29	25,3	cyclictest	3777489	-21	kworker/u8:3+events_unbound	23:50:24	0
3558623	99	29	25,3	cyclictest	3667676	-21	kworker/u8:4+events_unbound	21:05:15	0
3558633	99	28	25,2	cyclictest	3667676	-21	kworker/u8:4+flush-259:0	21:25:22	3
3558633	99	28	24,3	cyclictest	3667676	-21	kworker/u8:4+flush-259:0	22:35:19	3
3558625	99	28	23,3	cyclictest	3641587	-21	gpgv	20:30:01	1
3558625	99	28	15,2	cyclictest	3604960	-21	idleruntime-cro	19:55:00	1
3558623	99	28	22,4	cyclictest	3855241	-21	latency_hist	00:05:01	0
3558633	99	27	24,2	cyclictest	3599819	-21	kworker/u8:0+flush-259:0	20:10:18	3
3558633	99	27	23,3	cyclictest	3547939	-21	kworker/u8:1+flush-259:0	19:20:21	3
3558633	99	27	21,4	cyclictest	252	-21	systemd-journal	19:55:36	3
3558628	99	27	24,2	cyclictest	3647077	-21	kworker/u8:1+events_unbound	20:50:02	2
3558628	99	27	24,2	cyclictest	3599819	-21	kworker/u8:0+events_unbound	20:11:22	2
3558628	99	27	23,3	cyclictest	3860380	-21	kworker/u8:1+events_unbound	00:19:35	2
3558625	99	27	21,4	cyclictest	3537956	-21	kworker/u8:3+flush-259:0	19:15:16	1
3558623	99	27	21,4	cyclictest	3782917	-21	/usr/sbin/munin	22:55:14	0
3558628	99	26	23,2	cyclictest	3772328	-21	kworker/u8:0+events_unbound	22:47:22	2
3558628	99	26	23,2	cyclictest	3620889	-21	kworker/u8:3+events_unbound	20:15:39	2
3558625	99	26	11,4	cyclictest	3870940	-21	/usr/sbin/munin	00:20:13	1
3558623	99	26	19,5	cyclictest	3812645	-21	ntpq	23:20:21	0
3558623	99	26	19,4	cyclictest	3652193	-21	latency_hist	20:40:01	0
3558628	99	25	23,2	cyclictest	3798106	-21	kworker/u8:2+events_unbound	23:58:17	2
3558628	99	25	23,2	cyclictest	3777489	-21	kworker/u8:3+events_unbound	23:24:56	2
3558628	99	25	23,2	cyclictest	3667676	-21	kworker/u8:4+events_unbound	22:04:56	2
3558625	99	25	19,4	cyclictest	252	-21	systemd-journal	00:14:34	1
3558623	99	25	21,3	cyclictest	3777489	-21	kworker/u8:3+flush-259:0	00:30:18	0
3558623	99	25	21,3	cyclictest	3777489	-21	kworker/u8:3+flush-259:0	00:10:21	0
3558623	99	25	20,3	cyclictest	3741720	-21	apt-get	22:15:11	0
3558628	99	24	22,2	cyclictest	3777489	-21	kworker/u8:3+events_unbound	00:34:55	2
3558628	99	24	21,2	cyclictest	3563682	-21	kworker/u8:0+events_unbound	19:40:01	2
3558625	99	24	18,4	cyclictest	3715281	-21	apt-get	21:45:12	1
3558623	99	24	19,3	cyclictest	3599819	-21	kworker/u8:0+events_unbound	20:05:15	0
3558623	99	24	18,4	cyclictest	3641982	-21	base64	20:30:01	0
3558633	99	23	18,4	cyclictest	3594272	-21	kworker/u8:2+flush-259:0	20:30:01	3
3558633	99	23	17,5	cyclictest	3869792	-21	ntpq	00:15:21	3
3558628	99	23	22,1	cyclictest	3746637	-21	kworker/u8:1+events_unbound	22:27:22	2
3558628	99	23	20,2	cyclictest	3777489	-21	kworker/u8:3+events_unbound	00:03:18	2
3558628	99	23	20,2	cyclictest	3667676	-21	kworker/u8:4+events_unbound	21:06:36	2
3558628	99	23	20,2	cyclictest	3547939	-21	kworker/u8:1+events_unbound	19:25:41	2
3558628	99	23	17,4	cyclictest	3834644	-21	latency_hist	23:45:01	2
3558628	99	23	17,4	cyclictest	3646170	-21	ntpq	20:30:21	2
3558625	99	23	19,3	cyclictest	3620889	-21	kworker/u8:3+flush-259:0	20:40:01	1
3558625	99	23	18,4	cyclictest	3777489	-21	kworker/u8:3+flush-259:0	23:45:15	1
3558625	99	23	17,4	cyclictest	3813763	-21	/usr/sbin/munin	23:25:23	1
3558625	99	23	16,5	cyclictest	3859443	-21	ntpq	00:05:17	1
3558623	99	23	20,2	cyclictest	3777489	-21	kworker/u8:3+events_unbound	23:40:17	0
3558623	99	23	19,3	cyclictest	3710132	-21	kworker/u8:1+flush-259:0	22:00:10	0
3558623	99	23	19,3	cyclictest	3547939	-21	kworker/u8:1+flush-259:0	19:10:25	0
3558623	99	23	19,3	cyclictest	3547939	-21	kworker/u8:1+events_unbound	19:35:23	0
3558623	99	23	19,2	cyclictest	3667676	-21	kworker/u8:4+flush-259:0	22:10:18	0
3558633	99	22	18,3	cyclictest	3798106	-21	kworker/u8:2+flush-259:0	23:30:00	3
3558633	99	22	17,4	cyclictest	3563682	-21	kworker/u8:0+flush-259:0	19:40:32	3
3558628	99	22	19,2	cyclictest	3777489	-21	kworker/u8:3+events_unbound	00:14:59	2
3558628	99	22	16,4	cyclictest	3767155	-21	latency_hist	22:40:00	2
3558625	99	22	17,3	cyclictest	3615968	-21	apt-get	20:05:12	1
3558623	99	22	18,3	cyclictest	3860380	-21	kworker/u8:1+flush-259:0	00:20:00	0
3558623	99	22	17,3	cyclictest	3631435	-21	apt-get	20:20:14	0
3558623	99	22	16,4	cyclictest	3746637	-21	kworker/u8:1+flush-259:0	23:05:30	0
3558623	99	22	16,4	cyclictest	252	-21	systemd-journal	19:19:19	0
3558633	99	21	15,4	cyclictest	3698581	-21	latency_hist	21:25:01	3
3558628	99	21	19,1	cyclictest	3667676	-21	kworker/u8:4+events_unbound	21:58:33	2
3558628	99	21	18,2	cyclictest	3777489	-21	kworker/u8:3+events_unbound	23:45:07	2
3558628	99	21	18,2	cyclictest	3746637	-21	kworker/u8:1+events_unbound	22:32:45	2
3558628	99	21	18,2	cyclictest	3736329	-21	kworker/u8:2+events_unbound	22:17:44	2
3558628	99	21	18,2	cyclictest	3677978	-21	kworker/u8:3+events_unbound	21:36:56	2
3558628	99	21	18,2	cyclictest	3667676	-21	kworker/u8:4+events_unbound	22:21:00	2
3558628	99	21	18,2	cyclictest	3667676	-21	kworker/u8:4+events_unbound	21:51:07	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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