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 13, 2026 00:45:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
18609	99	67	5,7	cyclictest	12	-21	ksoftirqd/0	21:40:12	0
18629	99	61	39,12	cyclictest	27	-21	ksoftirqd/2	23:35:12	2
18629	99	55	2,34	cyclictest	6981	-21	ssh	22:05:12	2
18642	99	53	32,16	cyclictest	359	66	irq/58-eth0	23:55:13	3
18642	99	53	1,23	cyclictest	359	66	irq/58-eth0	19:50:12	3
18642	99	52	38,10	cyclictest	359	66	irq/58-eth0	00:30:14	3
18629	99	52	24,17	cyclictest	0	-21	swapper/2	22:00:14	2
18642	99	51	5,29	cyclictest	359	66	irq/58-eth0	23:10:12	3
18629	99	49	1,25	cyclictest	32580	-21	ssh	22:55:12	2
18629	99	48	18,6	cyclictest	13	1	rcu_preempt	20:15:14	2
18629	99	47	1,34	cyclictest	0	-21	swapper/2	19:30:12	2
18618	99	47	3,38	cyclictest	4502	-21	ssh	21:10:12	1
18642	99	46	5,30	cyclictest	359	66	irq/58-eth0	21:10:13	3
18629	99	46	1,32	cyclictest	31208	-21	ssh	23:30:14	2
18609	99	44	25,10	cyclictest	0	-21	swapper/0	21:55:14	0
18609	99	43	3,29	cyclictest	1728	-21	ssh	22:20:13	0
18618	99	41	1,31	cyclictest	14529	-21	ssh	22:45:11	1
18642	99	40	8,29	cyclictest	359	66	irq/58-eth0	22:55:11	3
18642	99	40	3,21	cyclictest	359	66	irq/58-eth0	21:50:11	3
18642	99	40	18,16	cyclictest	359	66	irq/58-eth0	21:30:14	3
18642	99	39	4,25	cyclictest	359	66	irq/58-eth0	23:40:12	3
18642	99	39	3,23	cyclictest	359	66	irq/58-eth0	22:45:14	3
18629	99	39	1,19	cyclictest	25826	-21	ssh	23:45:12	2
18629	99	39	0,27	cyclictest	26404	-21	ssh	21:40:13	2
18609	99	39	2,26	cyclictest	6155	-21	sh	00:10:13	0
18642	99	38	4,21	cyclictest	359	66	irq/58-eth0	21:55:14	3
18642	99	38	3,19	cyclictest	359	66	irq/58-eth0	00:20:13	3
18629	99	38	29,4	cyclictest	3158	-21	kworker/u8:1	21:15:12	2
18629	99	38	2,29	cyclictest	27104	-21	rm	00:39:34	2
18629	99	38	2,29	cyclictest	27104	-21	rm	00:39:33	2
18629	99	38	2,29	cyclictest	18867	-21	ssh	23:58:31	2
18629	99	38	2,21	cyclictest	22112	-21	ssh	23:25:13	2
18609	99	38	3,27	cyclictest	8310	-21	ssh	21:30:12	0
18629	99	37	6,17	cyclictest	27	-21	ksoftirqd/2	20:05:13	2
18642	99	36	2,19	cyclictest	359	66	irq/58-eth0	23:50:12	3
18629	99	36	3,23	cyclictest	6158	-21	ssh	00:10:14	2
18629	99	36	17,13	cyclictest	0	-21	swapper/2	23:15:11	2
18629	99	35	1,27	cyclictest	9550	-21	ssh	23:53:15	2
18642	99	34	2,17	cyclictest	359	66	irq/58-eth0	19:45:15	3
18642	99	33	2,18	cyclictest	359	66	irq/58-eth0	23:15:11	3
18609	99	33	2,23	cyclictest	16307	-21	users	23:55:31	0
18629	99	32	5,17	cyclictest	273	46	irq/40-dwc2_hso	20:30:15	2
18629	99	32	4,17	cyclictest	27	-21	ksoftirqd/2	00:15:14	2
18618	99	32	7,20	cyclictest	27312	-21	ssh	23:10:11	1
18618	99	32	2,22	cyclictest	27822	-21	ntp_192.168.114	00:20:25	1
18618	99	32	18,11	cyclictest	2405	-21	ssh	23:50:10	1
18642	99	31	18,7	cyclictest	33	-21	ksoftirqd/3	22:30:11	3
18629	99	31	4,17	cyclictest	25067	-21	ssh	22:15:10	2
18629	99	31	2,16	cyclictest	273	46	irq/40-dwc2_hso	21:05:11	2
18609	99	31	9,11	cyclictest	12	-21	ksoftirqd/0	00:35:22	0
18609	99	31	9,11	cyclictest	12	-21	ksoftirqd/0	00:35:21	0
18609	99	31	4,17	cyclictest	19810	-21	ssh	22:30:12	0
18609	99	31	12,9	cyclictest	12	-21	ksoftirqd/0	23:15:11	0
18642	99	30	8,13	cyclictest	359	66	irq/58-eth0	21:45:12	3
18642	99	30	4,15	cyclictest	359	66	irq/58-eth0	22:05:14	3
18618	99	30	3,11	cyclictest	5951	-21	ssh	00:25:48	1
18618	99	30	1,11	cyclictest	25326	-21	ssh	21:39:14	1
18609	99	30	2,19	cyclictest	6997	-21	sh	22:05:14	0
18609	99	30	1,21	cyclictest	16041	-21	ssh	22:10:11	0
18642	99	29	13,9	cyclictest	0	-21	swapper/3	20:15:12	3
18629	99	29	2,16	cyclictest	273	46	irq/40-dwc2_hso	20:45:12	2
18629	99	29	1,18	cyclictest	9897	-21	ssh	00:30:15	2
18618	99	29	4,4	cyclictest	21	-21	ksoftirqd/1	22:10:28	1
18618	99	29	3,6	cyclictest	32619	-21	kthreadcore	00:05:27	1
18618	99	29	3,22	cyclictest	22097	-21	ssh	23:25:13	1
18618	99	29	16,7	cyclictest	28838	-21	apt-get	22:35:11	1
18609	99	29	9,8	cyclictest	12	-21	ksoftirqd/0	19:35:00	0
18609	99	29	1,3	cyclictest	13	1	rcu_preempt	19:15:12	0
18609	99	29	10,10	cyclictest	0	-21	swapper/0	23:05:02	0
18629	99	28	2,21	cyclictest	31725	-21	ssh	00:23:42	2
18618	99	28	5,19	cyclictest	13010	-21	ssh	23:20:13	1
18618	99	28	4,6	cyclictest	32647	-21	awk	22:55:12	1
18618	99	28	3,22	cyclictest	12084	-21	ssh	21:50:11	1
18618	99	28	2,7	cyclictest	21	-21	ksoftirqd/1	21:45:01	1
18618	99	28	1,8	cyclictest	23677	-21	diskstats	22:50:15	1
18609	99	28	3,4	cyclictest	12	-21	ksoftirqd/0	23:35:12	0
18609	99	28	11,10	cyclictest	12	-21	ksoftirqd/0	21:10:01	0
18629	99	27	3,9	cyclictest	0	-21	swapper/2	20:55:14	2
18629	99	27	3,17	cyclictest	273	46	irq/40-dwc2_hso	19:15:12	2
18629	99	27	2,21	cyclictest	0	-21	swapper/2	21:35:14	2
18629	99	27	2,12	cyclictest	8338	-21	diskmemload	21:30:15	2
18629	99	27	2,10	cyclictest	630	-21	Async	09:36:31	2
18618	99	27	7,5	cyclictest	21	-21	ksoftirqd/1	23:58:57	1
18618	99	27	6,5	cyclictest	21	-21	ksoftirqd/1	21:30:30	1
18618	99	27	4,6	cyclictest	25395	-21	cat	00:00:32	1
18618	99	27	4,5	cyclictest	13	1	rcu_preempt	20:45:12	1
18618	99	27	2,5	cyclictest	21	-21	ksoftirqd/1	23:15:12	1
18618	99	27	19,5	cyclictest	1700	-21	apt-get	22:20:13	1
18618	99	27	0,10	cyclictest	16709	-21	ssh	23:40:04	1
18609	99	27	9,8	cyclictest	12	-21	ksoftirqd/0	00:26:04	0
18609	99	27	8,7	cyclictest	12	-21	ksoftirqd/0	23:25:47	0
18609	99	27	13,4	cyclictest	12	-21	ksoftirqd/0	23:50:01	0
18609	99	27	11,6	cyclictest	0	-21	swapper/0	00:09:40	0
18642	99	26	3,13	cyclictest	359	66	irq/58-eth0	00:15:14	3
18629	99	26	4,7	cyclictest	0	-21	swapper/2	23:40:14	2
18629	99	26	4,13	cyclictest	273	46	irq/40-dwc2_hso	20:50:11	2
18629	99	26	3,18	cyclictest	273	46	irq/40-dwc2_hso	21:10:13	2
18618	99	26	7,4	cyclictest	20	1	rcuc/1	21:47:39	1
18618	99	26	7,13	cyclictest	7805	-21	ssh	23:35:12	1
18618	99	26	4,6	cyclictest	26002	-21	cat	21:55:32	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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