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 Thu Aug 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
27151	99	68	40,12	cyclictest	359	66	irq/58-eth0	21:20:14	3
27103	99	52	3,39	cyclictest	13409	-21	ssh	23:15:11	1
27151	99	51	3,30	cyclictest	359	66	irq/58-eth0	21:15:13	3
27076	99	51	4,38	cyclictest	14654	-21	ssh	22:40:10	0
27076	99	50	3,38	cyclictest	7964	-21	ssh	23:30:10	0
27103	99	48	3,33	cyclictest	18990	-21	ssh	00:30:15	1
27103	99	48	3,33	cyclictest	18990	-21	ssh	00:30:15	1
27151	99	47	33,9	cyclictest	359	66	irq/58-eth0	22:50:13	3
27103	99	45	1,30	cyclictest	22454	-21	ssh	21:15:12	1
27151	99	44	22,14	cyclictest	359	66	irq/58-eth0	23:15:12	3
27076	99	43	1,34	cyclictest	17028	-21	ssh	23:35:12	0
27151	99	42	21,10	cyclictest	359	66	irq/58-eth0	22:45:15	3
27130	99	42	4,30	cyclictest	273	46	irq/40-dwc2_hso	23:20:12	2
27151	99	41	3,21	cyclictest	359	66	irq/58-eth0	23:10:13	3
27151	99	41	29,6	cyclictest	359	66	irq/58-eth0	00:30:14	3
27151	99	41	29,6	cyclictest	359	66	irq/58-eth0	00:30:14	3
27103	99	41	2,5	cyclictest	13	1	rcu_preempt	22:25:10	1
27076	99	41	2,30	cyclictest	2707	-21	ssh	23:45:12	0
27151	99	40	2,23	cyclictest	359	66	irq/58-eth0	21:50:13	3
27076	99	40	2,28	cyclictest	18678	-21	ssh	23:00:13	0
27151	99	39	2,25	cyclictest	359	66	irq/58-eth0	23:20:13	3
27151	99	39	10,18	cyclictest	359	66	irq/58-eth0	23:55:13	3
27130	99	39	1,18	cyclictest	31517	-21	ssh	21:20:14	2
27130	99	38	1,22	cyclictest	22445	-21	sh	21:15:12	2
27151	99	37	4,20	cyclictest	359	66	irq/58-eth0	21:30:14	3
27076	99	37	2,28	cyclictest	27756	-21	ssh	23:05:14	0
27076	99	37	2,28	cyclictest	0	-21	swapper/0	23:25:13	0
27151	99	36	20,9	cyclictest	0	-21	swapper/3	22:15:11	3
27076	99	34	21,6	cyclictest	0	-21	swapper/0	00:15:12	0
27130	99	33	1,26	cyclictest	20725	-21	ssh	23:55:14	2
27103	99	33	2,23	cyclictest	23768	-21	ssh	22:45:14	1
27103	99	33	12,5	cyclictest	13	1	rcu_preempt	00:10:12	1
27076	99	33	2,22	cyclictest	12088	-21	sh	21:45:11	0
27076	99	33	2,21	cyclictest	13342	-21	ssh	21:10:14	0
27130	99	32	1,27	cyclictest	12079	-21	ssh	21:45:11	2
27076	99	32	3,25	cyclictest	26135	-21	ssh	23:40:15	0
27130	99	31	3,21	cyclictest	0	-21	swapper/2	19:35:13	2
27151	99	30	18,7	cyclictest	0	-21	swapper/3	22:00:13	3
27151	99	30	1,18	cyclictest	359	66	irq/58-eth0	00:35:13	3
27151	99	30	1,15	cyclictest	359	66	irq/58-eth0	20:10:13	3
27130	99	30	4,19	cyclictest	273	46	irq/40-dwc2_hso	21:55:13	2
27130	99	30	4,17	cyclictest	27	-21	ksoftirqd/2	22:25:13	2
27130	99	30	3,18	cyclictest	273	46	irq/40-dwc2_hso	22:50:14	2
27130	99	30	2,6	cyclictest	947	-21	ssh	00:20:12	2
27130	99	30	2,22	cyclictest	7978	-21	ssh	23:30:10	2
27130	99	30	2,21	cyclictest	0	-21	swapper/2	20:30:12	2
27130	99	30	2,14	cyclictest	27	-21	ksoftirqd/2	20:35:12	2
27130	99	30	1,24	cyclictest	0	-21	swapper/2	00:15:13	2
27103	99	30	18,3	cyclictest	21	-21	ksoftirqd/1	22:15:11	1
27076	99	30	5,17	cyclictest	0	-21	swapper/0	20:45:10	0
27130	99	29	4,18	cyclictest	27	-21	ksoftirqd/2	21:40:13	2
27130	99	29	3,19	cyclictest	273	46	irq/40-dwc2_hso	19:50:13	2
27130	99	29	2,8	cyclictest	17296	-21	ssh	21:30:15	2
27130	99	29	2,21	cyclictest	0	-21	swapper/2	20:20:13	2
27130	99	29	2,21	cyclictest	0	-21	swapper/2	20:20:13	2
27130	99	29	2,21	cyclictest	0	-21	swapper/2	19:30:12	2
27103	99	29	4,10	cyclictest	13	1	rcu_preempt	00:25:13	1
27103	99	29	3,18	cyclictest	964	-21	ssh	00:20:13	1
27103	99	29	2,20	cyclictest	21195	-21	ssh	21:50:13	1
27103	99	29	13,7	cyclictest	0	-21	swapper/1	22:50:13	1
27130	99	28	5,16	cyclictest	273	46	irq/40-dwc2_hso	22:15:13	2
27130	99	28	2,21	cyclictest	4617	-21	ssh	22:34:21	2
27130	99	28	2,21	cyclictest	4617	-21	ssh	22:34:20	2
27130	99	28	2,21	cyclictest	20096	-21	kworker/u8:0	22:42:21	2
27130	99	28	2,20	cyclictest	23449	-21	ssh	23:37:20	2
27130	99	28	2,15	cyclictest	21185	-21	ssh	21:50:13	2
27130	99	28	2,11	cyclictest	7906	-21	ssh	22:00:19	2
27130	99	28	1,13	cyclictest	4155	-21	apt	00:40:00	2
27103	99	28	3,15	cyclictest	630	-21	Async	09:36:31	1
27103	99	28	2,18	cyclictest	26920	-21	cat	23:40:20	1
27103	99	28	1,24	cyclictest	15930	-21	ssh	22:05:14	1
27103	99	28	1,17	cyclictest	17287	-21	ssh	21:30:14	1
27130	99	27	5,15	cyclictest	273	46	irq/40-dwc2_hso	23:10:12	2
27130	99	27	3,17	cyclictest	273	46	irq/40-dwc2_hso	21:25:13	2
27130	99	27	2,23	cyclictest	31456	-21	ssh	23:25:13	2
27130	99	27	1,17	cyclictest	273	46	irq/40-dwc2_hso	19:55:11	2
27130	99	27	1,17	cyclictest	273	46	irq/40-dwc2_hso	19:55:10	2
27103	99	27	2,18	cyclictest	12928	-21	diskmemload	23:20:11	1
27103	99	27	1,22	cyclictest	27737	-21	ssh	23:05:12	1
27103	99	27	1,21	cyclictest	21	-21	ksoftirqd/1	22:30:14	1
27103	99	27	1,21	cyclictest	21	-21	ksoftirqd/1	22:30:14	1
27076	99	27	2,18	cyclictest	2975	-21	ssh	21:40:13	0
27130	99	26	3,6	cyclictest	0	-21	swapper/2	22:10:20	2
27103	99	26	16,4	cyclictest	31536	-21	ssh	21:20:15	1
27076	99	26	6,14	cyclictest	12	-21	ksoftirqd/0	19:20:14	0
27151	99	25	2,17	cyclictest	0	-21	swapper/3	22:34:21	3
27151	99	25	2,17	cyclictest	0	-21	swapper/3	22:34:20	3
27130	99	25	5,16	cyclictest	0	-21	swapper/2	23:15:12	2
27103	99	25	1,16	cyclictest	22340	-21	ssh	23:00:24	1
27076	99	25	2,17	cyclictest	2064	-21	ssh	22:50:20	0
27076	99	25	13,6	cyclictest	0	-21	swapper/0	00:27:24	0
27151	99	24	6,10	cyclictest	359	66	irq/58-eth0	21:55:15	3
27130	99	24	13,8	cyclictest	0	-21	swapper/2	21:15:01	2
27130	99	24	1,13	cyclictest	11323	-21	apt	23:50:01	2
27130	99	24	11,10	cyclictest	20810	-21	/usr/sbin/munin	22:05:32	2
27103	99	24	2,18	cyclictest	6377	-21	ssh	00:05:14	1
27103	99	24	2,18	cyclictest	11740	-21	ssh	23:50:14	1
27103	99	24	14,4	cyclictest	0	-21	swapper/1	23:55:13	1
27103	99	24	1,19	cyclictest	28555	-21	find	19:45:12	1
27103	99	24	1,18	cyclictest	6849	-21	sh	22:00:13	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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