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 Jul 09, 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
5792	99	64	4,38	cyclictest	23242	-21	rm	21:45:14	2
5792	99	57	6,40	cyclictest	30792	-21	ssh	22:25:14	2
5792	99	55	37,10	cyclictest	27	-21	ksoftirqd/2	20:30:14	2
5774	99	47	4,4	cyclictest	13	1	rcu_preempt	22:40:13	0
5782	99	46	2,7	cyclictest	13	1	rcu_preempt	19:40:12	1
5792	99	45	3,37	cyclictest	18322	-21	ssh	23:30:14	2
5774	99	43	3,7	cyclictest	13	1	rcu_preempt	22:15:12	0
5774	99	42	26,3	cyclictest	12	-21	ksoftirqd/0	23:50:11	0
5782	99	38	2,29	cyclictest	3873	-21	ssh	23:40:14	1
5800	99	37	6,23	cyclictest	359	66	irq/58-eth0	00:15:11	3
5800	99	37	3,22	cyclictest	359	66	irq/58-eth0	22:15:11	3
5774	99	37	1,33	cyclictest	28518	-21	ssh	21:30:13	0
5782	99	36	3,29	cyclictest	25521	-21	ssh	22:40:13	1
5800	99	35	2,16	cyclictest	359	66	irq/58-eth0	00:10:13	3
5782	99	35	3,26	cyclictest	18112	-21	ssh	22:00:15	1
5774	99	33	2,2	cyclictest	13	1	rcu_preempt	23:20:13	0
5792	99	32	3,23	cyclictest	0	-21	swapper/2	23:46:59	2
5792	99	32	3,16	cyclictest	630	-21	Async	09:36:31	2
5792	99	32	15,11	cyclictest	27	-21	ksoftirqd/2	22:50:13	2
5774	99	32	1,19	cyclictest	5054	-21	ssh	21:35:11	0
5792	99	30	5,15	cyclictest	273	46	irq/40-dwc2_hso	23:10:11	2
5792	99	30	4,16	cyclictest	273	46	irq/40-dwc2_hso	23:15:15	2
5792	99	30	3,21	cyclictest	0	-21	swapper/2	23:35:13	2
5792	99	30	2,21	cyclictest	0	-21	swapper/2	19:45:12	2
5792	99	30	2,21	cyclictest	0	-21	swapper/2	19:30:15	2
5792	99	30	2,21	cyclictest	0	-21	swapper/2	19:30:14	2
5792	99	30	2,16	cyclictest	7577	-21	ssh	00:00:14	2
5792	99	30	2,16	cyclictest	7577	-21	ssh	00:00:13	2
5774	99	30	2,20	cyclictest	25471	-21	ssh	00:10:12	0
5800	99	29	8,16	cyclictest	0	-21	swapper/3	23:20:13	3
5800	99	29	2,21	cyclictest	359	66	irq/58-eth0	19:40:13	3
5800	99	29	1,19	cyclictest	359	66	irq/58-eth0	23:55:12	3
5792	99	29	5,14	cyclictest	273	46	irq/40-dwc2_hso	23:20:13	2
5792	99	29	3,20	cyclictest	16425	-21	ssh	22:35:12	2
5792	99	29	2,21	cyclictest	28846	-21	ssh	23:52:59	2
5774	99	29	2,21	cyclictest	20637	-21	sed	00:25:17	0
5792	99	28	6,12	cyclictest	273	46	irq/40-dwc2_hso	19:15:12	2
5792	99	28	5,13	cyclictest	273	46	irq/40-dwc2_hso	20:05:13	2
5792	99	28	5,13	cyclictest	273	46	irq/40-dwc2_hso	19:55:11	2
5792	99	28	3,14	cyclictest	273	46	irq/40-dwc2_hso	21:00:13	2
5782	99	28	20,4	cyclictest	21	-21	ksoftirqd/1	21:15:14	1
5774	99	28	2,23	cyclictest	2046	-21	ssh	00:15:10	0
5792	99	27	6,18	cyclictest	273	46	irq/40-dwc2_hso	20:55:11	2
5792	99	27	2,20	cyclictest	27956	-21	sshd	00:10:20	2
5792	99	27	2,20	cyclictest	0	-21	swapper/2	19:10:14	2
5792	99	27	2,11	cyclictest	24288	-21	diskmemload	00:28:28	2
5782	99	27	2,20	cyclictest	21874	-21	ssh	23:50:13	1
5782	99	27	2,20	cyclictest	13839	-21	ssh	00:39:18	1
5782	99	27	2,19	cyclictest	4833	-21	ssh	00:34:16	1
5782	99	27	2,19	cyclictest	20636	-21	cut	00:25:18	1
5782	99	27	13,3	cyclictest	24288	-21	diskmemload	00:10:18	1
5800	99	26	2,18	cyclictest	0	-21	swapper/3	00:23:27	3
5792	99	26	3,16	cyclictest	273	46	irq/40-dwc2_hso	00:05:13	2
5792	99	26	2,9	cyclictest	9382	-21	ssh	23:41:17	2
5792	99	26	19,4	cyclictest	27	-21	ksoftirqd/2	23:25:11	2
5792	99	26	1,20	cyclictest	29117	-21	sh	23:00:13	2
5782	99	26	2,18	cyclictest	32303	-21	ssh	21:50:14	1
5774	99	26	2,19	cyclictest	4236	-21	ssh	00:33:34	0
5800	99	25	3,15	cyclictest	0	-21	swapper/3	00:39:18	3
5800	99	25	3,14	cyclictest	359	66	irq/58-eth0	22:40:13	3
5800	99	25	10,10	cyclictest	359	66	irq/58-eth0	21:30:15	3
5792	99	25	5,15	cyclictest	273	46	irq/40-dwc2_hso	00:20:12	2
5792	99	25	3,14	cyclictest	273	46	irq/40-dwc2_hso	20:00:14	2
5792	99	25	3,13	cyclictest	273	46	irq/40-dwc2_hso	19:25:11	2
5792	99	25	2,9	cyclictest	7360	-21	ssh	22:30:14	2
5792	99	25	2,16	cyclictest	0	-21	swapper/2	20:50:05	2
5782	99	25	2,14	cyclictest	20086	-21	ssh	22:55:14	1
5782	99	25	1,19	cyclictest	2091	-21	ssh	22:45:11	1
5782	99	25	1,19	cyclictest	0	-21	swapper/1	23:20:12	1
5800	99	24	9,10	cyclictest	0	-21	swapper/3	22:00:12	3
5800	99	24	3,14	cyclictest	0	-21	swapper/3	00:25:17	3
5792	99	24	3,13	cyclictest	273	46	irq/40-dwc2_hso	21:05:11	2
5792	99	24	2,13	cyclictest	273	46	irq/40-dwc2_hso	22:45:12	2
5782	99	24	9,3	cyclictest	24288	-21	diskmemload	21:46:38	1
5782	99	24	9,10	cyclictest	21	-21	ksoftirqd/1	23:55:15	1
5782	99	24	2,14	cyclictest	27278	-21	ssh	23:35:12	1
5782	99	24	10,7	cyclictest	24288	-21	diskmemload	23:49:31	1
5800	99	23	3,13	cyclictest	0	-21	swapper/3	23:25:04	3
5792	99	23	2,16	cyclictest	0	-21	swapper/2	23:57:16	2
5792	99	23	2,16	cyclictest	0	-21	swapper/2	00:31:17	2
5792	99	23	2,16	cyclictest	0	-21	swapper/2	00:18:17	2
5792	99	23	15,5	cyclictest	27208	-21	ssh	22:05:14	2
5792	99	23	10,10	cyclictest	24821	-21	sh	21:10:16	2
5782	99	23	12,3	cyclictest	24288	-21	diskmemload	23:06:22	1
5782	99	23	1,16	cyclictest	0	-21	swapper/1	21:30:15	1
5774	99	23	2,7	cyclictest	12	-21	ksoftirqd/0	21:00:01	0
5774	99	23	2,14	cyclictest	30782	-21	ssh	22:25:13	0
5774	99	23	16,5	cyclictest	12	-21	ksoftirqd/0	22:00:12	0
5774	99	23	1,19	cyclictest	16902	-21	ls	20:25:22	0
5774	99	23	1,17	cyclictest	11048	-21	ssh	23:43:16	0
5800	99	22	3,13	cyclictest	0	-21	swapper/3	00:34:16	3
5792	99	22	8,5	cyclictest	23676	-21	kthreadcore	22:20:19	2
5792	99	22	5,11	cyclictest	273	46	irq/40-dwc2_hso	21:50:13	2
5792	99	22	4,12	cyclictest	273	46	irq/40-dwc2_hso	21:55:12	2
5792	99	22	2,12	cyclictest	0	-21	swapper/2	20:35:12	2
5792	99	22	2,11	cyclictest	16340	-21	kthreadcore	21:40:20	2
5792	99	22	2,10	cyclictest	20087	-21	ssh	22:55:14	2
5792	99	22	1,9	cyclictest	7183	-21	latency	22:10:22	2
5792	99	22	1,6	cyclictest	26983	-21	kthreadcore	22:40:20	2
5792	99	22	1,18	cyclictest	8112	-21	kthreadcore	23:05:22	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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