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 Aug 15, 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
3589489	99	55	48,3	cyclictest	3793404	-21	kworker/u8:3+flush-259:0	23:00:01	3
3589489	99	52	49,2	cyclictest	3720207	-21	kworker/u8:3+events_unbound	21:20:14	3
3589474	99	50	47,2	cyclictest	3741683	-21	kworker/u8:0+flush-259:0	21:40:01	0
3589484	99	47	42,3	cyclictest	3845021	-21	kworker/u8:0+flush-259:0	23:55:21	2
3589474	99	47	44,2	cyclictest	3892116	-21	kworker/u8:1+flush-259:0	00:05:24	0
3589474	99	47	43,3	cyclictest	3793404	-21	kworker/u8:3+flush-259:0	22:35:01	0
3589484	99	45	42,2	cyclictest	3720207	-21	kworker/u8:3+events_unbound	21:40:24	2
3589489	99	44	41,2	cyclictest	3705085	-21	kworker/u8:2+flush-259:0	21:05:21	3
3589489	99	44	40,3	cyclictest	3772688	-21	kworker/u8:1+flush-259:0	22:30:01	3
3589484	99	44	41,2	cyclictest	3772688	-21	kworker/u8:1+events_unbound	22:20:14	2
3589474	99	44	39,1	cyclictest	3741683	-21	kworker/u8:0+events_unbound	21:50:00	0
3589489	99	42	39,2	cyclictest	3861162	-21	kworker/u8:1+events_unbound	23:35:23	3
3589484	99	42	38,3	cyclictest	587552	-21	kworker/u8:4+flush-259:0	19:10:29	2
3589489	99	41	38,2	cyclictest	3720207	-21	kworker/u8:3+events_unbound	21:40:21	3
3589474	99	41	38,2	cyclictest	3908172	-21	kworker/u8:3+events_unbound	00:30:14	0
3589474	99	41	38,2	cyclictest	3772688	-21	kworker/u8:1+events_unbound	22:40:14	0
3589474	99	41	38,2	cyclictest	2882661	-21	kworker/u8:3+events_unbound	19:15:24	0
3589489	99	40	35,4	cyclictest	3871499	-21	/usr/sbin/munin	23:40:14	3
3589484	99	40	37,2	cyclictest	3861162	-21	kworker/u8:1+flush-259:0	23:40:21	2
3589478	99	39	33,4	cyclictest	335557	-21	systemd-journal	22:40:40	1
3589474	99	39	36,2	cyclictest	3908172	-21	kworker/u8:3+flush-259:0	00:35:21	0
3589474	99	39	36,2	cyclictest	3673999	-21	kworker/u8:3+flush-259:0	20:45:14	0
3589474	99	39	33,4	cyclictest	3663738	-21	diskstats	20:20:13	0
3589489	99	38	35,2	cyclictest	3845021	-21	kworker/u8:0+flush-259:0	00:05:00	3
3589489	99	38	35,2	cyclictest	3793404	-21	kworker/u8:3+flush-259:0	23:10:21	3
3589489	99	38	35,2	cyclictest	3772688	-21	kworker/u8:1+flush-259:0	22:40:22	3
3589489	99	38	35,2	cyclictest	3772688	-21	kworker/u8:1+events_unbound	22:45:18	3
3589489	99	38	35,2	cyclictest	3772688	-21	kworker/u8:1+events_unbound	22:35:21	3
3589489	99	38	34,3	cyclictest	3653238	-21	kworker/u8:2+flush-259:0	20:10:25	3
3589474	99	38	35,2	cyclictest	3772688	-21	kworker/u8:1+flush-259:0	22:20:21	0
3589489	99	37	34,2	cyclictest	3720207	-21	kworker/u8:3+flush-259:0	22:05:15	3
3589484	99	37	34,2	cyclictest	3793404	-21	kworker/u8:3+flush-259:0	23:45:25	2
3589474	99	37	34,2	cyclictest	3741683	-21	kworker/u8:0+flush-259:0	22:00:25	0
3589489	99	36	33,2	cyclictest	3908172	-21	kworker/u8:3+flush-259:0	00:20:19	3
3589489	99	36	33,2	cyclictest	3908172	-21	kworker/u8:3+events_unbound	00:25:24	3
3589489	99	36	33,2	cyclictest	3741683	-21	kworker/u8:0+events_unbound	22:00:21	3
3589484	99	36	31,3	cyclictest	3652769	-21	cp	20:10:01	2
3589474	99	36	32,3	cyclictest	3908172	-21	kworker/u8:3+flush-259:0	00:25:20	0
3589474	99	36	32,3	cyclictest	3679296	-21	kworker/u8:0+flush-259:0	20:55:17	0
3589484	99	35	31,2	cyclictest	3908172	-21	kworker/u8:3+events_unbound	00:35:22	2
3589484	99	35	29,5	cyclictest	3892613	-21	cat	00:00:01	2
3589474	99	35	33,1	cyclictest	3908172	-21	kworker/u8:3+flush-259:0	00:15:23	0
3589474	99	35	32,2	cyclictest	3793404	-21	kworker/u8:3+events_unbound	23:20:19	0
3589474	99	35	32,2	cyclictest	3772688	-21	kworker/u8:1+flush-259:0	23:00:21	0
3589474	99	35	29,4	cyclictest	3761458	-21	ntpq	21:50:22	0
3589489	99	34	31,2	cyclictest	3772688	-21	kworker/u8:1+events_unbound	23:00:13	3
3589489	99	34	31,2	cyclictest	3725816	-21	kworker/u8:1+events_unbound	21:30:16	3
3589484	99	34	30,3	cyclictest	3600586	-21	base64	19:20:01	2
3589478	99	34	1,31	cyclictest	1	-21	systemd	22:20:00	1
3589474	99	34	31,2	cyclictest	3787933	-21	kworker/u8:2+events_unbound	22:20:00	0
3589489	99	33	30,2	cyclictest	3679296	-21	kworker/u8:0+events_unbound	20:55:14	3
3589489	99	33	30,2	cyclictest	3679296	-21	kworker/u8:0+events_unbound	20:50:22	3
3589489	99	33	30,2	cyclictest	3653238	-21	kworker/u8:2+events_unbound	20:20:14	3
3589484	99	33	29,3	cyclictest	3642483	-21	kworker/u8:1+flush-259:0	20:25:24	2
3589478	99	33	27,4	cyclictest	335557	-21	systemd-journal	22:04:59	1
3589474	99	33	30,2	cyclictest	3892116	-21	kworker/u8:1+flush-259:0	00:20:16	0
3589474	99	33	28,2	cyclictest	3720207	-21	kworker/u8:3+events_unbound	22:05:18	0
3589489	99	32	30,1	cyclictest	3793404	-21	kworker/u8:3+events_unbound	23:45:22	3
3589489	99	32	29,2	cyclictest	587552	-21	kworker/u8:4+flush-259:0	19:10:24	3
3589489	99	32	28,3	cyclictest	3573925	-21	kworker/u8:0+events_unbound	19:27:36	3
3589484	99	32	28,3	cyclictest	3845021	-21	kworker/u8:0+events_unbound	23:15:00	2
3589484	99	32	28,2	cyclictest	3679296	-21	kworker/u8:0+flush-259:0	20:55:19	2
3589478	99	32	27,4	cyclictest	509	-21	rs:main		1
3589474	99	32	29,2	cyclictest	3861162	-21	kworker/u8:1+events_unbound	23:45:18	0
3589474	99	32	27,2	cyclictest	3772688	-21	kworker/u8:1+events_unbound	23:05:14	0
3589474	99	32	1,30	cyclictest	1	-21	systemd	23:54:59	0
3589489	99	31	28,2	cyclictest	3793404	-21	kworker/u8:3+events_unbound	23:20:24	3
3589489	99	31	28,2	cyclictest	3787933	-21	kworker/u8:2+events_unbound	22:23:42	3
3589489	99	31	28,2	cyclictest	3573925	-21	kworker/u8:0+events_unbound	19:20:19	3
3589489	99	31	28,2	cyclictest	2882661	-21	kworker/u8:3+events_unbound	19:35:17	3
3589484	99	31	27,3	cyclictest	3793404	-21	kworker/u8:3+flush-259:0	23:05:21	2
3589484	99	31	27,3	cyclictest	335557	-21	systemd-journal	23:19:40	2
3589474	99	31	28,2	cyclictest	3861162	-21	kworker/u8:1+events_unbound	23:30:21	0
3589474	99	31	28,2	cyclictest	3793404	-21	kworker/u8:3+flush-259:0	22:50:18	0
3589474	99	31	28,2	cyclictest	3705085	-21	kworker/u8:2+events_unbound	21:05:01	0
3589474	99	31	24,5	cyclictest	3710661	-21	diskstats	21:05:14	0
3589489	99	30	28,2	cyclictest	587552	-21	kworker/u8:4+flush-259:0	20:00:25	3
3589489	99	30	27,2	cyclictest	3772688	-21	kworker/u8:1+flush-259:0	22:30:20	3
3589489	99	30	27,2	cyclictest	3741683	-21	kworker/u8:0+events_unbound	21:45:21	3
3589484	99	30	27,2	cyclictest	3908172	-21	kworker/u8:3+flush-259:0	00:30:21	2
3589484	99	30	26,3	cyclictest	3772688	-21	kworker/u8:1+flush-259:0	23:05:00	2
3589484	99	30	26,3	cyclictest	3720207	-21	kworker/u8:3+events_unbound	22:10:25	2
3589474	99	30	27,2	cyclictest	3866349	-21	apt-get	23:35:12	0
3589474	99	30	27,2	cyclictest	3720207	-21	kworker/u8:3+events_unbound	21:45:00	0
3589474	99	30	27,2	cyclictest	3673999	-21	kworker/u8:3+flush-259:0	20:40:24	0
3589489	99	29	26,2	cyclictest	3772688	-21	kworker/u8:1+flush-259:0	23:15:10	3
3589489	99	29	26,2	cyclictest	3720207	-21	kworker/u8:3+flush-259:0	22:10:21	3
3589484	99	29	25,3	cyclictest	3725816	-21	kworker/u8:1+flush-259:0	21:25:01	2
3589484	99	29	24,4	cyclictest	3705085	-21	kworker/u8:2+events_unbound	21:01:42	2
3589478	99	29	25,3	cyclictest	3594859	-21	kworker/u8:1+flush-259:0	19:20:00	1
3589478	99	29	24,4	cyclictest	3850841	-21	/usr/sbin/munin	23:20:16	1
3589478	99	29	23,4	cyclictest	3778064	-21	/usr/sbin/munin	22:10:14	1
3589474	99	29	26,2	cyclictest	3705085	-21	kworker/u8:2+events_unbound	21:11:41	0
3589474	99	29	26,2	cyclictest	3679296	-21	kworker/u8:0+flush-259:0	21:15:21	0
3589474	99	29	22,5	cyclictest	3632322	-21	diskstats	19:50:13	0
3589474	99	29	22,5	cyclictest	3632322	-21	diskstats	19:50:13	0
3589489	99	28	25,2	cyclictest	3845021	-21	kworker/u8:0+events_unbound	23:25:11	3
3589489	99	28	25,2	cyclictest	3720207	-21	kworker/u8:3+flush-259:0	22:15:15	3
3589484	99	28	25,2	cyclictest	3861162	-21	kworker/u8:1+events_unbound	23:35:13	2
3589478	99	28	23,4	cyclictest	3741683	-21	kworker/u8:0+flush-259:0	21:50:22	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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