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 Sun Aug 16, 2026 00:45:09)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1481	99	54	2,39	cyclictest	32353	-21	ssh	23:05:15	1
1481	99	54	1,25	cyclictest	19648	-21	sh	00:10:15	1
1515	99	53	3,36	cyclictest	8917	-21	ssh	23:10:14	2
1515	99	53	3,36	cyclictest	8917	-21	ssh	23:10:13	2
1481	99	52	1,37	cyclictest	9224	-21	ssh	21:40:11	1
1530	99	49	40,5	cyclictest	359	66	irq/58-eth0	21:55:13	3
1481	99	48	1,14	cyclictest	0	-21	swapper/1	20:35:14	1
1515	99	46	29,8	cyclictest	27	-21	ksoftirqd/2	23:20:13	2
1481	99	45	1,37	cyclictest	14630	-21	ssh	21:25:13	1
1515	99	43	7,30	cyclictest	13	1	rcu_preempt	22:20:14	2
1515	99	43	7,30	cyclictest	13	1	rcu_preempt	22:20:13	2
1481	99	42	5,9	cyclictest	21	-21	ksoftirqd/1	22:20:14	1
1481	99	42	5,9	cyclictest	21	-21	ksoftirqd/1	22:20:13	1
1481	99	42	4,5	cyclictest	13	1	rcu_preempt	19:25:12	1
1481	99	42	1,35	cyclictest	10650	-21	ssh	00:05:16	1
1515	99	41	13,11	cyclictest	1436	-21	cyclictest	22:00:16	2
1481	99	41	1,28	cyclictest	3366	-21	ssh	23:25:12	1
1481	99	40	1,11	cyclictest	21	-21	ksoftirqd/1	23:40:14	1
1481	99	39	1,29	cyclictest	14401	-21	ssh	22:55:14	1
1481	99	39	0,33	cyclictest	16019	-21	ssh	23:50:13	1
1530	99	38	1,23	cyclictest	0	-21	swapper/3	21:10:13	3
1481	99	37	3,27	cyclictest	12386	-21	ssh	23:30:13	1
1481	99	37	16,17	cyclictest	20	1	rcuc/1	23:15:14	1
1515	99	36	4,24	cyclictest	19913	-21	ssh	22:40:12	2
1530	99	35	3,20	cyclictest	359	66	irq/58-eth0	22:35:13	3
1530	99	35	17,14	cyclictest	0	-21	swapper/3	21:20:14	3
1515	99	35	3,3	cyclictest	0	-21	swapper/2	23:35:13	2
1515	99	35	13,7	cyclictest	1436	-21	cyclictest	22:50:13	2
1515	99	33	2,20	cyclictest	18236	-21	ssh	21:45:12	2
1515	99	33	18,10	cyclictest	27	-21	ksoftirqd/2	22:35:15	2
1481	99	33	1,22	cyclictest	18250	-21	ssh	21:45:13	1
1530	99	32	17,12	cyclictest	0	-21	swapper/3	00:00:15	3
1515	99	32	4,17	cyclictest	273	46	irq/40-dwc2_hso	19:15:14	2
1454	99	32	4,20	cyclictest	21848	-21	ssh	22:05:12	0
1454	99	32	0,3	cyclictest	13	1	rcu_preempt	21:40:25	0
1530	99	31	3,16	cyclictest	359	66	irq/58-eth0	23:55:13	3
1530	99	31	17,9	cyclictest	0	-21	swapper/3	23:45:11	3
1515	99	31	3,20	cyclictest	273	46	irq/40-dwc2_hso	22:55:16	2
1454	99	31	4,19	cyclictest	32351	-21	sh	23:05:14	0
1530	99	30	3,14	cyclictest	359	66	irq/58-eth0	21:45:13	3
1530	99	30	18,10	cyclictest	0	-21	swapper/3	22:15:12	3
1530	99	30	1,21	cyclictest	359	66	irq/58-eth0	23:20:14	3
1515	99	30	5,15	cyclictest	23326	-21	sh	23:00:10	2
1515	99	30	3,16	cyclictest	28712	-21	ssh	00:15:14	2
1515	99	30	1,17	cyclictest	14658	-21	ssh	21:25:13	2
1530	99	29	4,15	cyclictest	359	66	irq/58-eth0	00:30:13	3
1530	99	29	3,19	cyclictest	359	66	irq/58-eth0	23:05:14	3
1530	99	29	23,3	cyclictest	0	-21	swapper/3	00:35:13	3
1530	99	29	2,21	cyclictest	0	-21	swapper/3	23:00:12	3
1515	99	29	5,12	cyclictest	27	-21	ksoftirqd/2	20:35:15	2
1515	99	29	4,12	cyclictest	273	46	irq/40-dwc2_hso	21:40:12	2
1481	99	29	2,19	cyclictest	5309	-21	ssh	00:20:15	1
1481	99	29	1,22	cyclictest	21868	-21	ssh	22:05:14	1
1454	99	29	5,15	cyclictest	5425	-21	ssh	22:50:14	0
1454	99	29	21,4	cyclictest	0	-21	swapper/0	22:10:14	0
1530	99	28	3,19	cyclictest	359	66	irq/58-eth0	22:30:11	3
1530	99	28	17,8	cyclictest	359	66	irq/58-eth0	21:25:13	3
1530	99	28	17,8	cyclictest	0	-21	swapper/3	00:15:15	3
1530	99	28	16,9	cyclictest	0	-21	swapper/3	22:05:12	3
1515	99	28	8,11	cyclictest	0	-21	swapper/2	19:40:14	2
1515	99	28	5,13	cyclictest	273	46	irq/40-dwc2_hso	21:05:11	2
1515	99	28	4,16	cyclictest	273	46	irq/40-dwc2_hso	22:10:13	2
1515	99	28	3,18	cyclictest	273	46	irq/40-dwc2_hso	20:50:11	2
1515	99	28	3,14	cyclictest	273	46	irq/40-dwc2_hso	19:25:13	2
1481	99	28	3,5	cyclictest	21	-21	ksoftirqd/1	20:50:11	1
1454	99	28	23,3	cyclictest	0	-21	swapper/0	23:45:12	0
1530	99	27	17,4	cyclictest	0	-21	swapper/3	22:00:16	3
1530	99	27	14,8	cyclictest	359	66	irq/58-eth0	23:10:14	3
1530	99	27	14,8	cyclictest	359	66	irq/58-eth0	23:10:14	3
1515	99	27	3,18	cyclictest	273	46	irq/40-dwc2_hso	21:35:15	2
1515	99	27	2,16	cyclictest	273	46	irq/40-dwc2_hso	19:20:13	2
1515	99	27	1,22	cyclictest	16176	-21	cut	23:50:16	2
1481	99	27	12,4	cyclictest	13	1	rcu_preempt	00:30:13	1
1454	99	27	3,19	cyclictest	7486	-21	ssh	22:15:13	0
1454	99	27	2,18	cyclictest	32215	-21	ssh	00:35:15	0
1454	99	27	14,9	cyclictest	28860	-21	ssh	22:45:15	0
1454	99	27	14,5	cyclictest	12	-21	ksoftirqd/0	00:25:36	0
1454	99	27	13,3	cyclictest	0	-21	swapper/0	22:03:29	0
1454	99	27	1,17	cyclictest	18247	-21	sh	21:45:12	0
1530	99	26	16,7	cyclictest	359	66	irq/58-eth0	23:35:14	3
1530	99	26	1,16	cyclictest	359	66	irq/58-eth0	00:05:15	3
1515	99	26	2,15	cyclictest	273	46	irq/40-dwc2_hso	19:10:14	2
1481	99	26	6,4	cyclictest	13	1	rcu_preempt	23:10:14	1
1481	99	26	6,4	cyclictest	13	1	rcu_preempt	23:10:13	1
1481	99	26	1,3	cyclictest	13	1	rcu_preempt	21:10:13	1
1454	99	26	9,9	cyclictest	12	-21	ksoftirqd/0	00:33:39	0
1454	99	26	9,3	cyclictest	13	1	rcu_preempt	21:32:34	0
1454	99	26	5,18	cyclictest	20023	-21	ssh	21:10:13	0
1454	99	26	3,3	cyclictest	13	1	rcu_preempt	22:30:14	0
1530	99	25	5,16	cyclictest	359	66	irq/58-eth0	21:30:13	3
1530	99	25	4,10	cyclictest	0	-21	swapper/3	20:05:13	3
1530	99	25	2,18	cyclictest	359	66	irq/58-eth0	22:40:13	3
1530	99	25	2,14	cyclictest	359	66	irq/58-eth0	22:20:15	3
1530	99	25	2,14	cyclictest	359	66	irq/58-eth0	22:20:14	3
1530	99	25	18,5	cyclictest	359	66	irq/58-eth0	00:20:15	3
1530	99	25	17,5	cyclictest	359	66	irq/58-eth0	23:25:13	3
1530	99	25	13,8	cyclictest	0	-21	swapper/3	23:40:15	3
1530	99	25	1,15	cyclictest	0	-21	swapper/3	19:20:12	3
1515	99	25	4,16	cyclictest	273	46	irq/40-dwc2_hso	23:45:14	2
1515	99	25	2,18	cyclictest	3390	-21	sh	23:25:14	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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