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 Tue Aug 18, 2026 00:45:12)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
10478	99	64	4,31	cyclictest	23311	-21	ssh	23:30:14	2
10478	99	54	2,38	cyclictest	15722	-21	ssh	22:50:15	2
10478	99	52	2,31	cyclictest	32332	-21	ssh	23:35:12	2
10487	99	51	23,23	cyclictest	359	66	irq/58-eth0	21:45:13	3
10478	99	51	3,29	cyclictest	0	-21	swapper/2	19:15:12	2
10478	99	50	5,31	cyclictest	6644	-21	ssh	22:45:12	2
10478	99	50	5,31	cyclictest	6644	-21	ssh	22:45:12	2
10478	99	48	1,34	cyclictest	930	-21	snmpd	21:30:11	2
10478	99	47	18,22	cyclictest	7951	-1	kworker/u9:2	22:35:14	2
10487	99	45	25,8	cyclictest	359	66	irq/58-eth0	22:30:14	3
10455	99	45	2,35	cyclictest	32348	-21	ssh	23:35:14	0
10478	99	38	19,7	cyclictest	0	-21	swapper/2	21:25:14	2
10478	99	37	2,18	cyclictest	29998	-21	ssh	22:40:09	2
10455	99	37	1,29	cyclictest	27517	-21	ssh	21:45:15	0
10478	99	36	1,29	cyclictest	9043	-21	ssh	23:40:12	2
10478	99	35	6,17	cyclictest	273	46	irq/40-dwc2_hso	20:35:13	2
10470	99	35	20,9	cyclictest	10454	-21	cyclictest	19:50:10	1
10478	99	34	4,20	cyclictest	630	-21	Async	09:36:31	2
10478	99	34	1,13	cyclictest	27	-21	ksoftirqd/2	19:10:13	2
10470	99	33	4,18	cyclictest	21	-21	ksoftirqd/1	23:55:15	1
10470	99	33	2,21	cyclictest	13249	-21	ssh	21:55:15	1
10470	99	33	2,21	cyclictest	13249	-21	ssh	21:55:15	1
10455	99	33	1,24	cyclictest	18473	-21	ssh	21:40:15	0
10478	99	32	4,17	cyclictest	273	46	irq/40-dwc2_hso	21:10:10	2
10455	99	32	4,20	cyclictest	10813	-21	ssh	00:35:13	0
10455	99	32	3,24	cyclictest	21676	-21	ssh	00:05:16	0
10478	99	31	5,16	cyclictest	273	46	irq/40-dwc2_hso	00:00:12	2
10455	99	31	8,17	cyclictest	8459	-21	diskmemload	00:32:41	0
10455	99	31	8,17	cyclictest	8459	-21	diskmemload	00:32:41	0
10478	99	30	5,10	cyclictest	0	-21	swapper/2	21:15:14	2
10478	99	30	2,22	cyclictest	11999	-21	ssh	22:30:15	2
10470	99	30	3,21	cyclictest	21656	-21	ssh	00:05:15	1
10478	99	29	3,21	cyclictest	0	-21	swapper/2	22:08:09	2
10478	99	29	2,21	cyclictest	1355	-21	ssh	23:00:14	2
10455	99	29	2,19	cyclictest	17036	-21	ssh	22:15:10	0
10478	99	28	3,10	cyclictest	0	-21	swapper/2	00:22:40	2
10470	99	28	2,20	cyclictest	31181	-21	ssh	22:57:29	1
10455	99	28	18,3	cyclictest	28632	-21	diskmemload	22:50:01	0
10455	99	28	18,3	cyclictest	28632	-21	diskmemload	22:50:00	0
10487	99	27	3,17	cyclictest	0	-21	swapper/3	22:57:28	3
10487	99	27	19,4	cyclictest	359	66	irq/58-eth0	22:25:15	3
10487	99	27	15,6	cyclictest	0	-21	swapper/3	23:15:11	3
10478	99	27	5,13	cyclictest	273	46	irq/40-dwc2_hso	20:45:13	2
10478	99	27	4,16	cyclictest	273	46	irq/40-dwc2_hso	19:40:14	2
10478	99	27	4,16	cyclictest	273	46	irq/40-dwc2_hso	19:40:14	2
10478	99	27	2,19	cyclictest	0	-21	swapper/2	19:45:13	2
10470	99	27	16,7	cyclictest	21	-21	ksoftirqd/1	20:10:16	1
10478	99	26	4,17	cyclictest	273	46	irq/40-dwc2_hso	21:20:14	2
10478	99	26	1,9	cyclictest	25107	-21	ssh	23:48:08	2
10478	99	26	1,9	cyclictest	17078	-21	ssh	22:15:12	2
10470	99	26	1,18	cyclictest	19449	-21	ssh	23:10:13	1
10455	99	26	6,2	cyclictest	13	1	rcu_preempt	23:25:13	0
10455	99	26	1,18	cyclictest	14800	-21	ssh	21:20:14	0
10487	99	25	3,14	cyclictest	0	-21	swapper/3	22:15:10	3
10478	99	25	2,17	cyclictest	536	-21	usb-storage	21:00:04	2
10478	99	25	2,15	cyclictest	273	46	irq/40-dwc2_hso	00:15:13	2
10478	99	25	2,13	cyclictest	30576	-21	ssh	00:10:11	2
10478	99	25	13,3	cyclictest	9376	-21	apt-get	21:35:13	2
10478	99	25	1,13	cyclictest	21911	-21	ssh	22:00:01	2
10478	99	25	1,13	cyclictest	21911	-21	ssh	22:00:01	2
10455	99	25	1,4	cyclictest	0	-21	swapper/0	19:10:14	0
10478	99	24	3,16	cyclictest	0	-21	swapper/2	23:08:09	2
10478	99	24	2,17	cyclictest	2330	-21	cut	00:30:18	2
10478	99	24	2,17	cyclictest	2330	-21	cut	00:30:18	2
10478	99	24	2,16	cyclictest	273	46	irq/40-dwc2_hso	20:40:14	2
10478	99	24	2,13	cyclictest	273	46	irq/40-dwc2_hso	20:20:15	2
10478	99	24	2,12	cyclictest	930	-21	snmpd	22:25:15	2
10478	99	24	14,8	cyclictest	0	-21	swapper/2	23:10:16	2
10478	99	24	14,8	cyclictest	0	-21	swapper/2	22:20:14	2
10478	99	24	12,10	cyclictest	0	-21	swapper/2	19:25:19	2
10478	99	24	1,14	cyclictest	27527	-21	ssh	21:45:15	2
10470	99	24	1,19	cyclictest	7146	-21	ssh	00:15:12	1
10455	99	24	3,15	cyclictest	28632	-21	diskmemload	23:55:14	0
10455	99	24	1,19	cyclictest	26239	-21	ssh	22:20:15	0
10455	99	24	1,16	cyclictest	27060	-21	ssh	23:50:13	0
10455	99	24	11,10	cyclictest	0	-21	swapper/0	23:15:10	0
10487	99	23	6,8	cyclictest	359	66	irq/58-eth0	23:05:12	3
10487	99	23	3,13	cyclictest	0	-21	swapper/3	23:35:14	3
10487	99	23	11,8	cyclictest	0	-21	swapper/3	21:30:23	3
10478	99	23	8,12	cyclictest	0	-21	swapper/2	23:55:29	2
10478	99	23	8,11	cyclictest	18955	-21	basename	21:00:01	2
10478	99	23	5,5	cyclictest	27	-21	ksoftirqd/2	23:20:14	2
10478	99	23	2,6	cyclictest	0	-21	swapper/2	00:25:17	2
10478	99	23	2,4	cyclictest	13	1	rcu_preempt	21:05:15	2
10478	99	23	13,4	cyclictest	0	-21	swapper/2	22:00:33	2
10478	99	23	1,19	cyclictest	21697	-21	df	19:55:15	2
10478	99	23	1,18	cyclictest	29994	-21	kthreadcore	23:50:23	2
10478	99	23	1,12	cyclictest	28780	-21	grep	22:55:29	2
10478	99	23	1,12	cyclictest	22457	-21	cut	00:05:22	2
10470	99	23	5,7	cyclictest	3611	-21	ntp_kernel_pll_	23:35:26	1
10470	99	23	2,16	cyclictest	28470	-21	ssh	23:15:12	1
10455	99	23	3,9	cyclictest	12	-21	ksoftirqd/0	20:15:12	0
10455	99	23	1,18	cyclictest	4252	-21	grep	21:50:14	0
10455	99	23	1,18	cyclictest	30795	-21	cut	00:10:16	0
10487	99	22	10,9	cyclictest	0	-21	swapper/3	23:11:22	3
10478	99	22	9,5	cyclictest	30863	-21	sh	23:15:20	2
10478	99	22	2,6	cyclictest	0	-21	swapper/2	22:10:09	2
10478	99	22	2,15	cyclictest	0	-21	swapper/2	23:29:08	2
10478	99	22	2,15	cyclictest	0	-21	swapper/2	21:40:09	2
10478	99	22	1,17	cyclictest	897	-21	kthreadcore	20:05:20	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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