OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 100 highest latencies:

System rack7slot4s.osadl.org (updated Wed May 20, 2026 00:45:13)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
25512	99	52	30,10	cyclictest	12	-21	ksoftirqd/0	19:35:14	0
25548	99	51	23,23	cyclictest	359	66	irq/58-eth0	00:00:15	3
25518	99	51	1,41	cyclictest	12846	-21	ssh	00:10:14	1
25512	99	51	1,40	cyclictest	13866	-21	ssh	22:05:13	0
25518	99	48	1,41	cyclictest	32649	-21	ssh	23:45:15	1
25518	99	47	1,41	cyclictest	0	-21	swapper/1	23:40:12	1
25518	99	47	1,36	cyclictest	8593	-21	ssh	22:20:14	1
25518	99	46	0,42	cyclictest	3860	-21	ssh	00:05:18	1
25512	99	46	3,38	cyclictest	29782	-21	rm	21:20:14	0
25518	99	45	2,39	cyclictest	25473	-21	apt-get	00:35:13	1
25518	99	45	2,38	cyclictest	0	-21	swapper/1	00:30:14	1
25518	99	45	1,38	cyclictest	31868	-21	apt-get	22:15:14	1
25527	99	44	0,27	cyclictest	930	-21	snmpd	23:00:12	2
25518	99	44	1,38	cyclictest	18623	-21	apt-get	20:10:14	1
25518	99	44	1,37	cyclictest	21793	-21	apt-get	00:15:12	1
25518	99	43	18,13	cyclictest	630	-21	Async	09:36:31	1
25518	99	42	2,36	cyclictest	22908	-21	apt-get	22:10:12	1
25518	99	42	2,34	cyclictest	25729	-21	apt-get	19:10:15	1
25518	99	42	1,37	cyclictest	13867	-21	apt-get	22:05:14	1
25518	99	42	1,28	cyclictest	10860	-21	ssh	23:15:14	1
25518	99	41	1,26	cyclictest	17964	-21	ssh	22:41:26	1
25518	99	41	0,2	cyclictest	0	-21	swapper/1	19:30:11	1
25518	99	40	3,33	cyclictest	17346	-21	apt-get	19:35:14	1
25518	99	40	3,28	cyclictest	11690	-21	ssh	21:10:15	1
25518	99	40	1,35	cyclictest	0	-21	swapper/1	21:30:13	1
25518	99	40	1,34	cyclictest	0	-21	swapper/1	23:10:12	1
25518	99	40	0,2	cyclictest	0	-21	swapper/1	20:20:12	1
25512	99	40	11,24	cyclictest	12	-21	ksoftirqd/0	00:25:13	0
25548	99	39	5,19	cyclictest	359	66	irq/58-eth0	23:40:12	3
25518	99	39	2,32	cyclictest	0	-21	swapper/1	23:25:13	1
25518	99	39	1,31	cyclictest	670	-21	apt-get	20:25:12	1
25518	99	39	0,2	cyclictest	0	-21	swapper/1	22:45:12	1
25548	99	38	2,22	cyclictest	359	66	irq/58-eth0	21:05:13	3
25527	99	38	1,22	cyclictest	3269	-21	ssh	22:35:12	2
25518	99	38	1,32	cyclictest	14499	-21	apt-get	23:35:14	1
25518	99	38	1,32	cyclictest	14499	-21	apt-get	23:35:14	1
25518	99	38	1,32	cyclictest	0	-21	swapper/1	00:20:16	1
25518	99	38	0,3	cyclictest	29757	-21	apt-get	21:20:12	1
25518	99	38	0,26	cyclictest	15084	-21	/usr/sbin/munin	20:40:13	1
25518	99	38	0,26	cyclictest	15084	-21	/usr/sbin/munin	20:40:13	1
25518	99	37	1,31	cyclictest	3263	-21	apt-get	22:35:13	1
25518	99	37	1,31	cyclictest	30537	-21	apt-get	19:15:12	1
25518	99	37	1,31	cyclictest	0	-21	swapper/1	21:50:12	1
25518	99	37	1,30	cyclictest	7373	-21	apt-get	00:25:12	1
25518	99	37	0,24	cyclictest	23006	-21	ssh	22:26:07	1
25512	99	37	14,17	cyclictest	17857	-21	sh	23:18:05	0
25527	99	36	2,27	cyclictest	18141	-21	ssh	23:55:11	2
25518	99	36	2,30	cyclictest	0	-21	swapper/1	22:30:12	1
25518	99	36	2,27	cyclictest	5409	-21	ssh	23:30:12	1
25518	99	36	1,32	cyclictest	0	-21	swapper/1	23:05:12	1
25518	99	36	1,30	cyclictest	18220	-21	ls	23:55:12	1
25518	99	36	1,30	cyclictest	0	-21	swapper/1	19:50:13	1
25518	99	36	1,29	cyclictest	13839	-21	apt-get	20:05:13	1
25518	99	36	0,31	cyclictest	0	-21	swapper/1	21:25:11	1
25548	99	35	2,21	cyclictest	359	66	irq/58-eth0	00:10:13	3
25518	99	35	1,31	cyclictest	6718	-21	apt-get	21:05:14	1
25518	99	35	1,29	cyclictest	3194	-21	cut	21:40:21	1
25518	99	35	0,32	cyclictest	2938	-21	apt-get	19:20:12	1
25518	99	35	0,24	cyclictest	1374	-21	sh	00:02:38	1
25518	99	35	0,23	cyclictest	5430	-21	ssh	22:53:35	1
25527	99	34	21,7	cyclictest	27	-21	ksoftirqd/2	00:10:13	2
25518	99	34	2,27	cyclictest	7121	-21	ssh	22:55:12	1
25518	99	34	0,30	cyclictest	7719	-21	apt-get	19:25:11	1
25518	99	34	0,30	cyclictest	7719	-21	apt-get	19:25:11	1
25548	99	33	2,21	cyclictest	359	66	irq/58-eth0	23:00:13	3
25527	99	33	11,9	cyclictest	0	-21	swapper/2	21:15:16	2
25518	99	33	1,29	cyclictest	23670	-21	sendmail_mailst	23:20:29	1
25518	99	33	1,28	cyclictest	25387	-21	kthreadcore	20:50:19	1
25518	99	33	0,2	cyclictest	0	-21	swapper/1	20:45:26	1
25548	99	32	1,13	cyclictest	359	66	irq/58-eth0	22:55:11	3
25527	99	32	7,10	cyclictest	17856	-21	sh	23:18:05	2
25527	99	32	10,19	cyclictest	29839	-21	diskmemload	22:13:03	2
25518	99	32	1,28	cyclictest	0	-21	swapper/1	21:55:12	1
25518	99	32	1,27	cyclictest	27248	-21	/usr/sbin/munin	19:45:17	1
25518	99	32	1,27	cyclictest	13634	-21	ssh	22:05:01	1
25518	99	32	1,27	cyclictest	13634	-21	ssh	22:05:01	1
25518	99	32	1,27	cyclictest	11107	-21	kthreadcore	20:35:19	1
25518	99	32	1,25	cyclictest	10141	-21	/usr/sbin/munin	21:45:14	1
25518	99	32	0,2	cyclictest	28010	-21	ssh	21:35:23	1
25518	99	32	0,2	cyclictest	28010	-21	ssh	21:35:23	1
25518	99	32	0,29	cyclictest	29584	-21	df	20:55:14	1
25518	99	32	0,27	cyclictest	16194	-21	apt-get	23:00:11	1
25527	99	31	1,20	cyclictest	28275	-21	ssh	21:55:12	2
25518	99	31	1,27	cyclictest	5989	-21	sed	20:30:20	1
25518	99	31	1,27	cyclictest	12411	-21	ntp_states	20:00:25	1
25518	99	31	1,26	cyclictest	0	-21	swapper/1	20:15:12	1
25518	99	31	0,27	cyclictest	4258	-21	/usr/sbin/munin	19:55:15	1
25518	99	31	0,27	cyclictest	25664	-21	sed	19:10:02	1
25518	99	31	0,21	cyclictest	15993	-21	ssh	23:52:53	1
25548	99	30	1,20	cyclictest	0	-21	swapper/3	22:45:12	3
25527	99	30	6,15	cyclictest	273	46	irq/40-dwc2_hso	19:35:13	2
25527	99	30	4,17	cyclictest	273	46	irq/40-dwc2_hso	19:55:12	2
25527	99	30	4,17	cyclictest	27243	-21	kworker/u8:1	00:25:13	2
25518	99	30	1,26	cyclictest	2774	-21	tr	21:00:19	1
25518	99	30	1,26	cyclictest	22264	-21	df_inode	19:40:14	1
25512	99	30	2,24	cyclictest	26680	-21	ssh	22:30:12	0
25512	99	30	1,25	cyclictest	1127	-21	ssh	21:40:12	0
25548	99	29	4,15	cyclictest	359	66	irq/58-eth0	23:35:14	3
25548	99	29	4,15	cyclictest	359	66	irq/58-eth0	23:35:14	3
25548	99	29	1,20	cyclictest	359	66	irq/58-eth0	23:30:12	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17