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
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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.
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 Tue May 12, 2026 00:45:10)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
13737	99	68	47,10	cyclictest	359	66	irq/58-eth0	00:00:12	3
13710	99	61	7,37	cyclictest	19411	-21	ssh	23:45:14	0
13727	99	55	1,47	cyclictest	0	-21	swapper/2	23:05:12	2
13727	99	55	0,51	cyclictest	10349	-21	apt-get	19:40:13	2
13727	99	54	2,46	cyclictest	0	-21	swapper/2	21:25:13	2
13727	99	52	3,43	cyclictest	3385	-21	apt-get	23:00:14	2
13727	99	52	3,43	cyclictest	3385	-21	apt-get	23:00:13	2
13727	99	52	2,34	cyclictest	0	-21	swapper/2	23:52:35	2
13714	99	51	3,44	cyclictest	10398	-21	ssh	22:10:14	1
13714	99	51	1,38	cyclictest	6965	-21	ssh	21:50:11	1
13710	99	50	2,36	cyclictest	12303	-21	ssh	23:05:13	0
13727	99	49	1,44	cyclictest	0	-21	swapper/2	21:40:14	2
13727	99	49	0,44	cyclictest	1464	-21	apt-get	23:35:12	2
13714	99	49	2,4	cyclictest	13	1	rcu_preempt	22:20:11	1
13710	99	48	5,32	cyclictest	19377	-21	ssh	22:15:13	0
13727	99	46	2,40	cyclictest	273	46	irq/40-dwc2_hso	00:35:14	2
13727	99	46	1,40	cyclictest	2835	-21	apt-get	00:30:14	2
13714	99	45	4,33	cyclictest	28309	-21	ssh	23:50:15	1
13714	99	45	1,35	cyclictest	32310	-21	ssh	21:10:15	1
13727	99	44	2,36	cyclictest	22973	-21	apt-get	22:35:15	2
13714	99	44	3,34	cyclictest	13987	-21	ssh	22:30:14	1
13710	99	44	1,35	cyclictest	24970	-21	ssh	22:00:15	0
13714	99	43	1,31	cyclictest	26847	-21	ssh	22:55:13	1
13737	99	41	6,24	cyclictest	359	66	irq/58-eth0	22:10:14	3
13727	99	41	9,28	cyclictest	29835	-21	needreboot	00:25:24	2
13727	99	41	31,7	cyclictest	273	46	irq/40-dwc2_hso	22:20:10	2
13727	99	41	2,33	cyclictest	273	46	irq/40-dwc2_hso	21:45:15	2
13727	99	41	1,37	cyclictest	32301	-21	ssh	21:10:13	2
13727	99	41	1,36	cyclictest	0	-21	swapper/2	00:00:12	2
13727	99	41	1,35	cyclictest	0	-21	swapper/2	23:45:15	2
13727	99	41	1,31	cyclictest	0	-21	swapper/2	21:15:14	2
13727	99	41	1,31	cyclictest	0	-21	swapper/2	20:35:13	2
13727	99	41	0,37	cyclictest	0	-21	swapper/2	00:05:15	2
13727	99	41	0,36	cyclictest	0	-21	swapper/2	22:30:12	2
13727	99	40	0,36	cyclictest	26073	-21	apt-get	20:30:11	2
13727	99	40	0,24	cyclictest	31886	-21	diskmemload	23:33:15	2
13714	99	40	5,26	cyclictest	13707	-21	ssh	00:00:12	1
13727	99	39	1,34	cyclictest	0	-21	swapper/2	19:15:11	2
13727	99	39	1,28	cyclictest	1386	-21	apt-get	22:05:12	2
13727	99	39	1,24	cyclictest	0	-21	swapper/2	21:31:22	2
13727	99	39	0,35	cyclictest	30213	-21	apt-get	23:15:14	2
13727	99	39	0,28	cyclictest	31886	-21	diskmemload	23:57:48	2
13727	99	39	0,26	cyclictest	7964	-21	cut	19:35:21	2
13714	99	39	20,7	cyclictest	21	-21	ksoftirqd/1	23:10:13	1
13710	99	39	2,28	cyclictest	6896	-21	ssh	23:20:11	0
13737	99	38	1,22	cyclictest	359	66	irq/58-eth0	21:10:13	3
13727	99	38	1,34	cyclictest	20092	-21	fschecks_count	19:50:17	2
13727	99	38	1,33	cyclictest	32013	-21	apt-get	22:40:14	2
13727	99	38	1,32	cyclictest	13927	-21	apt-get	19:10:12	2
13727	99	38	1,30	cyclictest	17166	-21	ssh	00:20:13	2
13727	99	38	0,30	cyclictest	0	-21	swapper/2	20:15:14	2
13727	99	38	0,23	cyclictest	31886	-21	diskmemload	23:43:19	2
13727	99	38	0,23	cyclictest	0	-21	swapper/2	22:56:58	2
13710	99	38	3,24	cyclictest	31886	-21	diskmemload	23:25:13	0
13737	99	37	5,27	cyclictest	359	66	irq/58-eth0	23:20:13	3
13727	99	37	1,33	cyclictest	12335	-21	apt-get	21:35:15	2
13727	99	37	1,32	cyclictest	29692	-21	df	20:00:14	2
13727	99	37	1,25	cyclictest	0	-21	swapper/2	22:15:13	2
13727	99	37	0,34	cyclictest	27422	-21	grep	19:20:27	2
13727	99	37	0,33	cyclictest	13709	-21	cyclictest	20:40:13	2
13727	99	37	0,33	cyclictest	13709	-21	cyclictest	20:40:12	2
13727	99	37	0,33	cyclictest	0	-21	swapper/2	21:05:13	2
13710	99	37	3,21	cyclictest	753	-21	sendmail-mta	20:25:13	0
13737	99	36	15,11	cyclictest	359	66	irq/58-eth0	23:00:14	3
13737	99	36	15,11	cyclictest	359	66	irq/58-eth0	23:00:14	3
13727	99	36	1,31	cyclictest	8500	-21	memory	22:25:26	2
13727	99	36	1,30	cyclictest	0	-21	swapper/2	20:45:12	2
13727	99	36	0,32	cyclictest	21261	-21	/usr/sbin/munin	20:25:13	2
13727	99	36	0,31	cyclictest	17826	-21	apt-get	22:50:16	2
13714	99	36	2,4	cyclictest	0	-21	swapper/1	20:10:14	1
13737	99	35	4,26	cyclictest	359	66	irq/58-eth0	21:45:14	3
13727	99	35	2,30	cyclictest	8140	-21	apt-get	00:15:12	2
13727	99	35	1,32	cyclictest	12324	-21	/usr/sbin/munin	22:45:24	2
13727	99	35	0,32	cyclictest	12947	-21	df_inode	20:50:16	2
13727	99	35	0,26	cyclictest	10652	-21	proc_pri	21:50:26	2
13737	99	34	2,21	cyclictest	359	66	irq/58-eth0	22:40:13	3
13727	99	34	1,30	cyclictest	729	-21	/usr/sbin/munin	19:30:24	2
13727	99	34	1,30	cyclictest	729	-21	/usr/sbin/munin	19:30:24	2
13727	99	34	1,30	cyclictest	32096	-21	cut	00:10:17	2
13727	99	34	1,30	cyclictest	0	-21	swapper/2	23:10:12	2
13727	99	34	1,29	cyclictest	24681	-21	latency_hist	22:00:02	2
13727	99	34	1,25	cyclictest	5485	-21	processes	20:05:27	2
13727	99	34	0,31	cyclictest	24404	-21	ssh	21:22:28	2
13727	99	34	0,31	cyclictest	18117	-21	ssh	22:13:59	2
13727	99	34	0,19	cyclictest	0	-21	swapper/2	23:29:32	2
13714	99	34	1,27	cyclictest	24973	-21	ssh	23:30:13	1
13727	99	33	1,24	cyclictest	25874	-21	/usr/sbin/munin	21:00:22	2
13727	99	33	0,29	cyclictest	15172	-21	munin-node	19:45:12	2
13727	99	33	0,29	cyclictest	0	-21	swapper/2	20:55:13	2
13714	99	33	1,20	cyclictest	1493	-21	ssh	23:35:13	1
13737	99	32	4,16	cyclictest	0	-21	swapper/3	21:50:11	3
13737	99	32	1,16	cyclictest	359	66	irq/58-eth0	00:15:13	3
13727	99	32	1,28	cyclictest	30258	-21	ssh	22:01:09	2
13727	99	32	1,27	cyclictest	0	-21	swapper/2	19:25:13	2
13727	99	32	0,25	cyclictest	15010	-21	ssh	23:24:20	2
13714	99	32	2,26	cyclictest	1389	-21	ssh	22:05:12	1
13737	99	31	1,18	cyclictest	359	66	irq/58-eth0	23:10:13	3
13727	99	31	1,27	cyclictest	0	-21	swapper/2	19:55:13	2
13714	99	31	14,12	cyclictest	13709	-21	cyclictest	00:20:13	1
13710	99	31	9,15	cyclictest	12	-21	ksoftirqd/0	23:55:14	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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