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 Aug 11, 2026 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3473312	99	46	42,3	cyclictest	3722694	-21	kworker/u8:1+events_unbound	23:45:00	2
3473312	99	46	41,3	cyclictest	3572685	-21	kworker/u8:4+flush-259:0	21:05:01	2
3473309	99	44	41,2	cyclictest	75	-21	kswapd0	22:40:04	1
3473317	99	42	36,4	cyclictest	3473036	-21	latency_hist	19:10:01	3
3473317	99	40	37,2	cyclictest	1429347	-21	kworker/u8:5+events_unbound	19:10:50	3
3473312	99	40	34,4	cyclictest	3525145	-21	latency_hist	20:00:01	2
3473309	99	40	36,3	cyclictest	3462857	-21	kworker/u8:2+flush-259:0	19:50:00	1
3473305	99	40	36,3	cyclictest	3582850	-21	kworker/u8:1+flush-259:0	21:30:00	0
3473305	99	40	33,5	cyclictest	3686133	-21	latency_hist	22:35:00	0
3473317	99	39	36,2	cyclictest	3551621	-21	/usr/sbin/munin	20:25:13	3
3473309	99	39	34,3	cyclictest	3691412	-21	gpgv	22:40:01	1
3473305	99	38	33,3	cyclictest	3550964	-21	latency_hist	20:25:01	0
3473305	99	38	32,4	cyclictest	3598268	-21	latency_hist	21:09:59	0
3473317	99	37	34,2	cyclictest	3738229	-21	kworker/u8:3+flush-259:0	23:30:01	3
3473317	99	37	33,3	cyclictest	3660339	-21	kworker/u8:1+events_unbound	22:25:22	3
3473317	99	37	31,4	cyclictest	3748800	-21	apt-get	23:35:11	3
3473312	99	36	33,2	cyclictest	3462857	-21	kworker/u8:2+flush-259:0	19:45:00	2
3473317	99	35	32,2	cyclictest	3634615	-21	kworker/u8:0+events_unbound	23:10:22	3
3473317	99	35	32,2	cyclictest	3499441	-21	kworker/u8:3+events_unbound	20:05:19	3
3473312	99	35	33,2	cyclictest	3545786	-21	kworker/u8:2+events_unbound	20:31:46	2
3473305	99	35	29,4	cyclictest	335557	-21	systemd-journal	20:55:00	0
3473312	99	34	30,3	cyclictest	1429347	-21	kworker/u8:5+flush-259:0	19:10:46	2
3473309	99	34	28,4	cyclictest	335557	-21	systemd-journal	23:25:01	1
3473317	99	33	31,2	cyclictest	3670651	-21	kworker/u8:2+flush-259:0	22:25:01	3
3473317	99	33	30,2	cyclictest	3525373	-21	kworker/u8:0+flush-259:0	20:45:45	3
3473317	99	32	29,2	cyclictest	3634615	-21	kworker/u8:0+events_unbound	21:45:15	3
3473317	99	32	29,2	cyclictest	3462857	-21	kworker/u8:2+events_unbound	19:45:21	3
3473317	99	32	29,2	cyclictest	1429347	-21	kworker/u8:5+events_unbound	19:15:19	3
3473312	99	32	29,2	cyclictest	3525373	-21	kworker/u8:0+flush-259:0	20:40:22	2
3473317	99	31	29,1	cyclictest	3650197	-21	kworker/u8:5+events_unbound	22:00:25	3
3473317	99	31	28,2	cyclictest	3779534	-21	kworker/u8:1+flush-259:0	00:05:27	3
3473317	99	31	28,2	cyclictest	3722694	-21	kworker/u8:1+flush-259:0	23:20:16	3
3473317	99	31	28,2	cyclictest	3691506	-21	kworker/u8:3+events_unbound	22:43:45	3
3473312	99	31	28,3	cyclictest	3499441	-21	kworker/u8:3+events_unbound	20:17:47	2
3473312	99	31	27,3	cyclictest	335557	-21	systemd-journal	19:38:46	2
3473312	99	31	27,3	cyclictest	335557	-21	systemd-journal	19:38:45	2
3473309	99	31	26,3	cyclictest	3790136	-21	apt-get	00:15:13	1
3473309	99	31	24,5	cyclictest	3556492	-21	latency_hist	20:30:00	1
3473305	99	31	25,4	cyclictest	335557	-21	systemd-journal	20:59:45	0
3473317	99	30	28,2	cyclictest	3748188	-21	kworker/u8:0+events_unbound	23:55:13	3
3473317	99	30	27,3	cyclictest	3572685	-21	kworker/u8:4+flush-259:0	21:32:11	3
3473317	99	30	27,2	cyclictest	3722694	-21	kworker/u8:1+flush-259:0	23:40:15	3
3473317	99	30	27,2	cyclictest	3722694	-21	kworker/u8:1+flush-259:0	23:15:21	3
3473317	99	30	27,2	cyclictest	3670651	-21	kworker/u8:2+flush-259:0	22:55:25	3
3473317	99	30	27,2	cyclictest	3545786	-21	kworker/u8:2+events_unbound	20:35:14	3
3473312	99	30	27,2	cyclictest	3753921	-21	kworker/u8:4+events_unbound	00:35:22	2
3473317	99	29	27,1	cyclictest	3634615	-21	kworker/u8:0+flush-259:0	22:15:15	3
3473317	99	29	26,2	cyclictest	3732764	-21	kworker/u8:2+events_unbound	23:25:21	3
3473317	99	29	26,2	cyclictest	3525373	-21	kworker/u8:0+events_unbound	20:00:19	3
3473312	99	29	26,2	cyclictest	3572685	-21	kworker/u8:4+flush-259:0	21:20:27	2
3473305	99	29	24,3	cyclictest	335557	-21	systemd-journal	21:55:45	0
3473305	99	29	0,27	cyclictest	509	-21	rs:main		0
3473317	99	28	24,3	cyclictest	3753921	-21	kworker/u8:4+events_unbound	23:45:14	3
3473312	99	28	25,2	cyclictest	3618964	-21	kworker/u8:2+flush-259:0	21:40:21	2
3473312	99	28	25,2	cyclictest	3525373	-21	kworker/u8:0+flush-259:0	20:30:01	2
3473312	99	28	24,3	cyclictest	3572685	-21	kworker/u8:4+events_unbound	21:18:47	2
3473309	99	28	23,3	cyclictest	3619187	-21	apt-get	21:30:14	1
3473305	99	28	25,2	cyclictest	3779534	-21	kworker/u8:1+events_unbound	00:35:00	0
3473312	99	27	23,3	cyclictest	3722694	-21	kworker/u8:1+events_unbound	23:32:50	2
3473305	99	27	24,2	cyclictest	3738229	-21	kworker/u8:3+events_unbound	23:32:28	0
3473305	99	27	23,3	cyclictest	3484046	-21	kworker/u8:1+events_unbound	19:26:56	0
3473305	99	27	23,3	cyclictest	3462857	-21	kworker/u8:2+flush-259:0	19:52:01	0
3473305	99	27	21,5	cyclictest	3624502	-21	diskstats	21:35:14	0
3473317	99	26	25,1	cyclictest	3462857	-21	kworker/u8:2+flush-259:0	19:20:16	3
3473317	99	26	23,2	cyclictest	3634615	-21	kworker/u8:0+events_unbound	22:55:00	3
3473317	99	26	23,2	cyclictest	3582850	-21	kworker/u8:1+flush-259:0	21:25:22	3
3473317	99	26	23,2	cyclictest	3499441	-21	kworker/u8:3+flush-259:0	20:20:19	3
3473317	99	26	22,3	cyclictest	3634615	-21	kworker/u8:0+flush-259:0	23:00:24	3
3473312	99	26	23,2	cyclictest	3572685	-21	kworker/u8:4+events_unbound	20:45:18	2
3473312	99	26	22,3	cyclictest	3670651	-21	kworker/u8:2+events_unbound	22:57:50	2
3473309	99	26	21,3	cyclictest	3650197	-21	kworker/u8:5+events_unbound	22:15:18	1
3473309	99	26	21,3	cyclictest	3494136	-21	apt-get	19:29:19	1
3473305	99	26	23,2	cyclictest	3733294	-21	apt-get	23:20:13	0
3473305	99	26	0,24	cyclictest	1	-21	systemd	00:19:32	0
3473317	99	25	22,2	cyclictest	3748188	-21	kworker/u8:0+events_unbound	23:50:23	3
3473317	99	25	22,2	cyclictest	3670651	-21	kworker/u8:2+events_unbound	22:45:24	3
3473317	99	25	19,4	cyclictest	3535877	-21	diskstats	20:10:14	3
3473312	99	25	22,2	cyclictest	3670651	-21	kworker/u8:2+events_unbound	22:30:01	2
3473312	99	25	20,2	cyclictest	3712406	-21	kworker/u8:3+flush-259:0	23:15:24	2
3473312	99	25	19,4	cyclictest	3629250	-21	latency_hist	21:40:01	2
3473309	99	25	20,4	cyclictest	335557	-21	systemd-journal	20:15:00	1
3473309	99	25	19,4	cyclictest	3598513	-21	/usr/sbin/munin	21:10:14	1
3473305	99	25	22,2	cyclictest	3660339	-21	kworker/u8:1+events_unbound	22:25:24	0
3473305	99	25	22,2	cyclictest	3551646	-21	apt-get	20:25:09	0
3473305	99	25	22,2	cyclictest	3499441	-21	kworker/u8:3+events_unbound	20:12:02	0
3473305	99	25	21,3	cyclictest	3712406	-21	kworker/u8:3+events_unbound	23:06:52	0
3473317	99	24	21,2	cyclictest	3650197	-21	kworker/u8:5+flush-259:0	22:05:21	3
3473317	99	24	21,2	cyclictest	3634615	-21	kworker/u8:0+events_unbound	21:50:22	3
3473317	99	24	21,2	cyclictest	3572685	-21	kworker/u8:4+events_unbound	20:50:13	3
3473317	99	24	20,3	cyclictest	3753921	-21	kworker/u8:4+events_unbound	00:22:36	3
3473317	99	24	20,3	cyclictest	3618964	-21	kworker/u8:2+flush-259:0	21:35:21	3
3473317	99	24	20,3	cyclictest	3582850	-21	kworker/u8:1+events_unbound	21:15:14	3
3473312	99	24	22,2	cyclictest	3462857	-21	kworker/u8:2+events_unbound	19:52:45	2
3473312	99	24	21,2	cyclictest	3779534	-21	kworker/u8:1+flush-259:0	00:05:29	2
3473312	99	24	21,2	cyclictest	3670651	-21	kworker/u8:2+events_unbound	22:45:18	2
3473312	99	24	21,2	cyclictest	3499441	-21	kworker/u8:3+flush-259:0	20:10:20	2
3473312	99	24	20,2	cyclictest	3618964	-21	kworker/u8:2+events_unbound	21:35:01	2
3473309	99	24	18,4	cyclictest	3795293	-21	/usr/sbin/munin	00:20:17	1
3473305	99	24	21,2	cyclictest	3462857	-21	kworker/u8:2+events_unbound	19:14:45	0
3473305	99	24	20,3	cyclictest	3774632	-21	apt-get	00:00:15	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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