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
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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 30, 2026 00:45:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
6744	99	69	24,8	cyclictest	13	1	rcu_preempt	19:20:13	0
6744	99	63	2,48	cyclictest	15084	-21	sshd	23:10:14	0
6744	99	59	26,25	cyclictest	12	-21	ksoftirqd/0	19:55:13	0
6755	99	58	2,43	cyclictest	27421	-21	ssh	22:05:10	1
6744	99	55	23,12	cyclictest	13	1	rcu_preempt	20:45:15	0
6744	99	53	5,37	cyclictest	7871	-21	ssh	00:00:14	0
6755	99	51	1,40	cyclictest	25343	-21	ssh	21:10:15	1
6755	99	49	2,42	cyclictest	0	-21	swapper/1	19:40:11	1
6744	99	49	2,40	cyclictest	16908	-21	ssh	00:05:17	0
6755	99	48	1,40	cyclictest	10745	-21	apt-get	20:55:12	1
6744	99	47	3,8	cyclictest	13	1	rcu_preempt	19:30:12	0
6744	99	47	2,32	cyclictest	618	-21	sshd	23:20:13	0
6744	99	46	3,35	cyclictest	29408	-21	ssh	00:30:13	0
6775	99	45	28,11	cyclictest	359	66	irq/58-eth0	21:20:13	3
6755	99	45	1,39	cyclictest	0	-21	swapper/1	22:40:14	1
6755	99	44	1,32	cyclictest	9959	66	ssh	23:05:30	1
6775	99	43	4,22	cyclictest	359	66	irq/58-eth0	23:45:13	3
6755	99	43	8,23	cyclictest	20463	-21	ssh	00:25:11	1
6755	99	43	1,38	cyclictest	0	-21	swapper/1	19:25:11	1
6755	99	43	1,36	cyclictest	0	-21	swapper/1	20:40:15	1
6755	99	43	1,35	cyclictest	1038	-21	apt-get	20:45:13	1
6744	99	43	2,7	cyclictest	13	1	rcu_preempt	21:40:13	0
6755	99	42	2,36	cyclictest	10888	-21	ssh	21:20:12	1
6755	99	42	2,29	cyclictest	4253	-21	ssh	23:40:09	1
6755	99	42	0,38	cyclictest	0	-21	swapper/1	20:50:13	1
6775	99	41	3,23	cyclictest	359	66	irq/58-eth0	22:45:12	3
6764	99	41	1,8	cyclictest	1838	-21	acpi	21:15:11	2
6755	99	41	2,37	cyclictest	0	-21	swapper/1	20:00:12	1
6755	99	41	2,36	cyclictest	13282	-21	apt-get	23:45:12	1
6755	99	41	1,37	cyclictest	18681	-21	ssh	23:30:11	1
6755	99	41	1,35	cyclictest	16898	-21	apt-get	00:05:17	1
6755	99	41	1,2	cyclictest	0	-21	swapper/1	19:45:11	1
6744	99	41	25,10	cyclictest	16644	-21	ssh	22:35:14	0
6744	99	41	1,31	cyclictest	22025	-21	ssh	22:20:14	0
6764	99	40	1,13	cyclictest	9691	-21	sh	23:25:12	2
6755	99	40	1,3	cyclictest	0	-21	swapper/1	19:55:14	1
6755	99	40	1,34	cyclictest	18338	-21	apt-get	22:00:13	1
6755	99	40	1,30	cyclictest	14688	-21	ssh	21:40:14	1
6755	99	40	1,27	cyclictest	24914	-21	diskmemload	21:26:10	1
6755	99	40	0,2	cyclictest	5563	-21	ssh	21:35:10	1
6744	99	40	2,29	cyclictest	20329	-21	ssh	22:55:16	0
6744	99	40	2,29	cyclictest	20329	-21	ssh	22:55:16	0
6764	99	39	1,8	cyclictest	31161	-21	kthreadcore	21:30:20	2
6764	99	39	1,15	cyclictest	20020	-21	fschecks_count	21:25:16	2
6755	99	39	2,28	cyclictest	9693	-21	ssh	23:25:13	1
6755	99	39	1,34	cyclictest	26226	-21	apt-get	19:30:12	1
6744	99	39	1,5	cyclictest	13	1	rcu_preempt	00:20:13	0
6764	99	38	2,12	cyclictest	27726	-21	ssh	23:35:14	2
6764	99	38	1,9	cyclictest	25903	-21	memory	20:00:21	2
6764	99	38	0,11	cyclictest	15061	-21	missed_timers	00:20:23	2
6755	99	38	1,34	cyclictest	0	-21	swapper/1	23:50:12	1
6755	99	38	1,30	cyclictest	22019	-21	apt-get	22:20:13	1
6755	99	38	0,23	cyclictest	5603	-21	ssh	21:15:26	1
6764	99	37	1,18	cyclictest	11210	-21	ssh	22:50:14	2
6764	99	37	1,14	cyclictest	19817	-21	kthreadcore	22:00:19	2
6755	99	37	2,33	cyclictest	0	-21	swapper/1	21:45:13	1
6755	99	37	1,3	cyclictest	0	-21	swapper/1	20:15:13	1
6755	99	37	1,33	cyclictest	7606	-21	apt-get	22:30:13	1
6755	99	37	1,33	cyclictest	0	-21	swapper/1	00:35:13	1
6755	99	37	1,21	cyclictest	0	-21	swapper/1	22:12:10	1
6755	99	37	0,25	cyclictest	4415	-21	kthreadcore	00:15:22	1
6744	99	37	24,11	cyclictest	12	-21	ksoftirqd/0	22:50:12	0
6775	99	36	3,23	cyclictest	359	66	irq/58-eth0	00:25:11	3
6775	99	36	3,22	cyclictest	359	66	irq/58-eth0	21:45:12	3
6764	99	36	8,4	cyclictest	32276	-21	switchtime	20:40:30	2
6764	99	36	2,11	cyclictest	29478	-21	ssh	23:00:15	2
6764	99	36	2,10	cyclictest	22255	-21	sshd	23:50:14	2
6764	99	36	1,12	cyclictest	31061	-21	ssh	22:25:13	2
6764	99	36	0,14	cyclictest	2181	-21	ssh	00:15:02	2
6755	99	36	1,31	cyclictest	2429	-21	grep	19:35:29	1
6755	99	36	1,2	cyclictest	12982	-21	apt-get	19:50:15	1
6755	99	36	1,2	cyclictest	0	-21	swapper/1	21:55:11	1
6755	99	36	1,29	cyclictest	27480	-21	apt-get	20:05:13	1
6744	99	36	0,30	cyclictest	19840	-21	ssh	21:25:12	0
6775	99	35	3,19	cyclictest	359	66	irq/58-eth0	23:40:09	3
6775	99	35	2,23	cyclictest	359	66	irq/58-eth0	22:20:15	3
6764	99	35	1,9	cyclictest	3043	-21	kthreadcore	23:20:21	2
6764	99	35	1,14	cyclictest	135	-21	systemd-journal	19:15:01	2
6755	99	35	1,31	cyclictest	3492	-21	kthreadcore	23:20:21	1
6755	99	35	1,2	cyclictest	0	-21	swapper/1	19:10:11	1
6755	99	35	1,29	cyclictest	15114	-21	wc	23:10:14	1
6755	99	35	1,29	cyclictest	14407	-21	cut	22:15:19	1
6755	99	35	1,29	cyclictest	0	-21	swapper/1	23:00:14	1
6755	99	35	1,22	cyclictest	24892	-21	ssh	22:39:39	1
6755	99	35	1,22	cyclictest	0	-21	swapper/1	00:11:56	1
6755	99	35	0,2	cyclictest	0	-21	swapper/1	21:00:12	1
6755	99	35	0,2	cyclictest	0	-21	swapper/1	21:00:11	1
6744	99	35	5,22	cyclictest	12	-21	ksoftirqd/0	20:25:13	0
6744	99	35	2,25	cyclictest	25816	-21	ssh	00:10:13	0
6775	99	34	2,21	cyclictest	359	66	irq/58-eth0	22:35:14	3
6764	99	34	1,9	cyclictest	6903	-21	grep	19:40:26	2
6764	99	34	1,9	cyclictest	19444	-21	ssh	22:35:23	2
6764	99	34	1,7	cyclictest	2243	-21	grep	19:35:28	2
6764	99	34	1,15	cyclictest	24429	-21	unixbench_multi	22:55:33	2
6764	99	34	1,15	cyclictest	24429	-21	unixbench_multi	22:55:32	2
6755	99	34	2,28	cyclictest	29039	-21	latency_hist	23:00:03	1
6755	99	34	2,28	cyclictest	29039	-21	latency_hist	23:00:02	1
6755	99	34	1,3	cyclictest	0	-21	swapper/1	20:30:13	1
6755	99	34	1,30	cyclictest	0	-21	swapper/1	22:45:15	1
6755	99	34	1,2	cyclictest	0	-21	swapper/1	21:50:09	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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