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 Wed Aug 12, 2026 00:45:11)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
20204	99	65	10,17	cyclictest	13	1	rcu_preempt	20:30:14	2
20204	99	63	1,47	cyclictest	6479	-21	ssh	00:10:13	2
20204	99	59	6,8	cyclictest	13	1	rcu_preempt	00:05:15	2
20204	99	55	1,10	cyclictest	13	1	rcu_preempt	19:15:13	2
20204	99	53	25,16	cyclictest	13	1	rcu_preempt	19:45:13	2
20204	99	53	19,23	cyclictest	27	-21	ksoftirqd/2	00:35:15	2
20181	99	50	4,34	cyclictest	2682	-21	ssh	22:20:14	0
20181	99	48	4,35	cyclictest	9976	-21	ssh	00:30:13	0
20181	99	47	2,41	cyclictest	31432	-21	ssh	22:00:16	0
20216	99	44	33,8	cyclictest	359	66	irq/58-eth0	22:10:13	3
20204	99	44	4,2	cyclictest	13	1	rcu_preempt	21:25:14	2
20196	99	42	4,35	cyclictest	11672	-21	ssh	22:25:11	1
20216	99	41	31,6	cyclictest	359	66	irq/58-eth0	00:05:16	3
20216	99	38	21,13	cyclictest	359	66	irq/58-eth0	21:40:13	3
20204	99	38	2,17	cyclictest	844	-21	munin-node	21:05:16	2
20216	99	37	4,29	cyclictest	0	-21	swapper/3	22:50:14	3
20204	99	37	2,22	cyclictest	22430	-21	ssh	21:55:14	2
20204	99	36	4,10	cyclictest	31725	-21	ssh	23:30:13	2
20204	99	36	2,22	cyclictest	273	46	irq/40-dwc2_hso	19:25:13	2
20204	99	36	1,16	cyclictest	29718	-21	ssh	22:35:14	2
20204	99	35	4,9	cyclictest	989	-21	sh	00:25:13	2
20204	99	35	25,6	cyclictest	27	-21	ksoftirqd/2	19:10:11	2
20204	99	35	2,24	cyclictest	18827	-21	ssh	21:35:14	2
20196	99	35	1,19	cyclictest	17435	-21	ssh	23:40:15	1
20181	99	35	1,29	cyclictest	21002	-21	sh	00:00:15	0
20204	99	34	3,10	cyclictest	0	-21	swapper/2	23:06:12	2
20196	99	34	11,6	cyclictest	13	1	rcu_preempt	20:45:26	1
20216	99	33	3,5	cyclictest	0	-21	swapper/3	21:15:13	3
20196	99	33	4,15	cyclictest	21004	-21	ssh	00:00:14	1
20196	99	33	3,23	cyclictest	17009	-21	ssh	22:10:13	1
20196	99	33	2,19	cyclictest	26422	-21	ssh	23:45:15	1
20181	99	33	2,26	cyclictest	26107	-21	ssh	22:15:15	0
20216	99	32	4,16	cyclictest	359	66	irq/58-eth0	21:35:13	3
20216	99	32	2,22	cyclictest	0	-21	swapper/3	22:45:13	3
20216	99	32	2,20	cyclictest	359	66	irq/58-eth0	19:40:13	3
20216	99	32	1,22	cyclictest	359	66	irq/58-eth0	21:10:13	3
20196	99	32	2,23	cyclictest	26108	-21	sshd	22:15:15	1
20181	99	32	0,11	cyclictest	15502	-21	ssh	23:01:22	0
20216	99	31	1,24	cyclictest	359	66	irq/58-eth0	21:25:14	3
20216	99	31	1,19	cyclictest	359	66	irq/58-eth0	20:30:14	3
20204	99	31	3,18	cyclictest	273	46	irq/40-dwc2_hso	23:35:13	2
20196	99	31	6,9	cyclictest	21	-21	ksoftirqd/1	00:31:59	1
20196	99	31	4,7	cyclictest	21	-21	ksoftirqd/1	23:15:26	1
20181	99	31	19,8	cyclictest	12	-21	ksoftirqd/0	23:40:14	0
20181	99	31	10,6	cyclictest	12	-21	ksoftirqd/0	21:48:50	0
20216	99	30	4,16	cyclictest	359	66	irq/58-eth0	23:55:15	3
20216	99	30	3,16	cyclictest	359	66	irq/58-eth0	20:35:16	3
20216	99	30	10,11	cyclictest	359	66	irq/58-eth0	23:20:13	3
20204	99	30	3,15	cyclictest	273	46	irq/40-dwc2_hso	21:15:13	2
20196	99	30	5,4	cyclictest	13	1	rcu_preempt	00:39:54	1
20181	99	30	2,22	cyclictest	21612	-21	ssh	23:24:15	0
20216	99	29	13,11	cyclictest	359	66	irq/58-eth0	22:40:13	3
20204	99	29	3,13	cyclictest	273	46	irq/40-dwc2_hso	20:15:14	2
20204	99	29	1,21	cyclictest	20771	-21	ssh	23:23:15	2
20196	99	29	14,5	cyclictest	21	-21	ksoftirqd/1	22:06:41	1
20181	99	29	1,7	cyclictest	2352	-21	mailstats	19:55:28	0
20181	99	29	16,10	cyclictest	15340	-21	apt-get	22:45:11	0
20216	99	28	1,12	cyclictest	0	-21	swapper/3	22:10:01	3
20204	99	28	6,13	cyclictest	273	46	irq/40-dwc2_hso	19:35:13	2
20204	99	28	3,8	cyclictest	20169	-21	cyclictest	23:55:15	2
20204	99	28	3,8	cyclictest	0	-21	swapper/2	23:14:15	2
20204	99	28	3,8	cyclictest	0	-21	swapper/2	23:14:14	2
20204	99	28	2,20	cyclictest	0	-21	swapper/2	20:45:15	2
20204	99	28	2,19	cyclictest	0	-21	swapper/2	20:10:15	2
20196	99	28	6,3	cyclictest	13	1	rcu_preempt	21:20:28	1
20196	99	28	6,3	cyclictest	13	1	rcu_preempt	20:10:24	1
20196	99	28	5,12	cyclictest	21	-21	ksoftirqd/1	20:15:22	1
20196	99	28	5,10	cyclictest	21	-21	ksoftirqd/1	21:38:53	1
20196	99	28	4,6	cyclictest	21	-21	ksoftirqd/1	21:52:41	1
20181	99	28	20,4	cyclictest	32371	-21	apt-get	20:30:14	0
20181	99	28	1,10	cyclictest	30384	-21	find	23:45:30	0
20181	99	28	0,8	cyclictest	17869	-21	latency_hist	20:15:01	0
20216	99	27	3,16	cyclictest	0	-21	swapper/3	23:06:13	3
20204	99	27	7,6	cyclictest	0	-21	swapper/2	22:05:14	2
20204	99	27	4,11	cyclictest	273	46	irq/40-dwc2_hso	21:00:13	2
20204	99	27	3,14	cyclictest	273	46	irq/40-dwc2_hso	20:00:17	2
20204	99	27	2,20	cyclictest	0	-21	swapper/2	19:40:14	2
20204	99	27	2,19	cyclictest	0	-21	swapper/2	23:50:14	2
20204	99	27	1,19	cyclictest	0	-21	swapper/2	20:40:11	2
20196	99	27	3,6	cyclictest	21	-21	ksoftirqd/1	00:20:19	1
20196	99	27	3,5	cyclictest	21	-21	ksoftirqd/1	00:10:16	1
20196	99	27	3,13	cyclictest	31430	-21	sshd	22:00:16	1
20196	99	27	19,5	cyclictest	20	1	rcuc/1	23:05:23	1
20181	99	27	4,4	cyclictest	12	-21	ksoftirqd/0	22:30:55	0
20181	99	27	3,5	cyclictest	12	-21	ksoftirqd/0	23:15:18	0
20181	99	27	2,5	cyclictest	12	-21	ksoftirqd/0	00:25:16	0
20181	99	27	1,10	cyclictest	12	-21	ksoftirqd/0	19:30:25	0
20216	99	26	8,6	cyclictest	0	-21	swapper/3	23:43:27	3
20216	99	26	6,9	cyclictest	359	66	irq/58-eth0	23:50:14	3
20216	99	26	5,15	cyclictest	0	-21	swapper/3	21:55:14	3
20216	99	26	3,8	cyclictest	0	-21	swapper/3	21:20:32	3
20216	99	26	3,20	cyclictest	359	66	irq/58-eth0	19:15:13	3
20216	99	26	3,14	cyclictest	0	-21	swapper/3	23:00:12	3
20216	99	26	3,13	cyclictest	359	66	irq/58-eth0	22:20:12	3
20216	99	26	2,7	cyclictest	0	-21	swapper/3	00:10:14	3
20216	99	26	2,17	cyclictest	0	-21	swapper/3	23:31:17	3
20204	99	26	3,11	cyclictest	27793	-21	ssh	21:40:13	2
20204	99	26	2,9	cyclictest	10096	-21	ssh	23:16:15	2
20204	99	26	2,14	cyclictest	0	-21	swapper/2	20:25:14	2
20196	99	26	6,11	cyclictest	6249	-21	kworker/u8:0	21:30:14	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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