OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Sat Dec 27, 2025 00:43:47)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
22602	2	94	82,8	sleep2	0	-21	swapper/2	19:06:31	2
22823	2	88	75,9	sleep0	0	-21	swapper/0	19:09:22	0
22754	2	86	73,9	sleep3	0	-21	swapper/3	19:08:29	3
22633	2	80	64,12	sleep1	0	-21	swapper/1	19:06:54	1
22967	99	24	23,1	cyclictest	39	-21	ksoftirqd/3	20:55:14	3
22967	99	23	0,4	cyclictest	0	-21	swapper/3	20:40:13	3
22962	99	23	1,21	cyclictest	381	50	irq/131-snd_hda	23:40:13	1
22967	99	19	18,1	cyclictest	0	-21	swapper/3	21:00:14	3
22967	99	18	10,8	cyclictest	0	-21	swapper/3	21:15:13	3
22957	99	18	6,6	cyclictest	1410	-21	munin-run	20:40:00	0
22962	99	17	15,1	cyclictest	16774	-21	ntpq	22:15:21	1
22962	99	17	13,3	cyclictest	18621	-21	cpuspeed_turbos	21:15:14	1
22957	99	17	0,11	cyclictest	0	-21	swapper/0	21:15:13	0
22967	99	16	14,1	cyclictest	2883	-21	apt-get	19:35:13	3
22967	99	16	12,4	cyclictest	39	-21	ksoftirqd/3	19:55:18	3
22964	99	16	16,0	cyclictest	0	-21	swapper/2	22:40:13	2
22962	99	16	15,1	cyclictest	0	-21	swapper/1	19:15:20	1
22957	99	16	11,3	cyclictest	4103	-21	munin-run	00:05:00	0
22967	99	15	13,2	cyclictest	0	-21	swapper/3	22:05:14	3
22964	99	15	1,8	cyclictest	225	-21	systemd-journal	20:21:29	2
22964	99	15	1,8	cyclictest	225	-21	systemd-journal	20:21:29	2
22967	99	14	10,3	cyclictest	22286	-21	grep	22:25:27	3
22964	99	14	9,3	cyclictest	29814	-21	tr	23:50:16	2
22964	99	14	13,1	cyclictest	0	-21	swapper/2	20:45:13	2
22964	99	14	10,3	cyclictest	21971	-21	ls	21:20:19	2
22962	99	14	0,6	cyclictest	225	-21	systemd-journal	20:30:00	1
22957	99	14	10,2	cyclictest	15930	-21	wc	21:10:00	0
22967	99	13	9,3	cyclictest	27695	-21	cron	22:40:00	3
22967	99	13	9,3	cyclictest	16573	-21	wc	23:20:24	3
22967	99	13	8,4	cyclictest	12320	-21	df_abs	00:20:14	3
22967	99	13	10,2	cyclictest	30366	-21	wc	20:30:21	3
22967	99	13	10,2	cyclictest	29825	-21	grep	23:50:16	3
22967	99	13	10,2	cyclictest	28440	-21	cut	21:35:17	3
22967	99	13	10,2	cyclictest	23996	-21	sed	22:30:19	3
22967	99	13	10,2	cyclictest	14861	-21	tail	00:25:17	3
22967	99	13	10,2	cyclictest	1460	-21	sed	21:45:17	3
22967	99	13	10,2	cyclictest	11943	-21	grep	19:50:26	3
22964	99	13	9,3	cyclictest	26869	-21	grep	19:15:19	2
22964	99	13	9,2	cyclictest	31308	-21	grep	22:45:19	2
22964	99	13	5,4	cyclictest	0	-21	swapper/2	23:20:00	2
22964	99	13	13,0	cyclictest	0	-21	swapper/2	00:15:15	2
22964	99	13	10,2	cyclictest	8094	-21	seq	20:50:27	2
22964	99	13	10,2	cyclictest	7311	-21	grep	21:55:25	2
22964	99	13	10,2	cyclictest	22858	-21	grep	20:15:17	2
22962	99	13	9,3	cyclictest	12768	-21	grep	19:55:14	1
22962	99	13	3,9	cyclictest	0	-21	swapper/1	19:40:23	1
22962	99	13	10,2	cyclictest	29795	-21	grep	19:20:26	1
22962	99	13	10,2	cyclictest	19580	-21	dump-pmu-power	23:30:00	1
22962	99	13	10,2	cyclictest	19553	-21	grep	20:10:00	1
22962	99	13	10,2	cyclictest	12515	-21	wc	21:00:22	1
22957	99	13	9,3	cyclictest	1494	-21	wc	22:50:19	0
22957	99	13	5,4	cyclictest	225	-21	systemd-journal	00:00:00	0
22957	99	13	4,5	cyclictest	225	-21	systemd-journal	00:35:18	0
22957	99	13	10,2	cyclictest	6957	-21	sed	19:40:26	0
22957	99	13	10,2	cyclictest	3148	-21	tr	19:35:14	0
22957	99	13	10,2	cyclictest	30045	-21	grep	20:30:18	0
22957	99	13	10,2	cyclictest	29783	-21	grep	19:20:26	0
22957	99	13	10,2	cyclictest	28371	-21	grep	21:35:17	0
22957	99	13	10,2	cyclictest	11809	-21	cut	00:20:12	0
22957	99	13	0,12	cyclictest	8138	-21	grep	20:50:27	0
22967	99	12	9,2	cyclictest	3133	-21	grep	22:55:15	3
22967	99	12	9,2	cyclictest	19876	-21	cut	20:10:13	3
22967	99	12	9,2	cyclictest	19148	-21	grep	22:20:22	3
22967	99	12	9,2	cyclictest	16581	-21	uname	22:15:20	3
22967	99	12	7,3	cyclictest	38	1	rcuc/3	21:40:11	3
22967	99	12	3,6	cyclictest	39	-21	ksoftirqd/3	19:25:00	3
22967	99	12	3,4	cyclictest	0	-21	swapper/3	00:00:18	3
22967	99	12	11,1	cyclictest	39	-21	ksoftirqd/3	22:45:01	3
22967	99	12	10,1	cyclictest	24830	-21	apt-get	23:40:13	3
22967	99	12	10,1	cyclictest	1984	-21	timerandwakeup	19:30:25	3
22967	99	12	0,5	cyclictest	39	-21	ksoftirqd/3	19:13:51	3
22964	99	12	9,2	cyclictest	7744	-21	grep	00:10:18	2
22964	99	12	9,2	cyclictest	6729	-21	python	19:40:25	2
22964	99	12	9,2	cyclictest	5008	-21	sort	00:05:18	2
22964	99	12	9,2	cyclictest	31401	-21	grep	21:40:15	2
22964	99	12	9,2	cyclictest	25622	-21	cat	19:15:00	2
22964	99	12	9,2	cyclictest	25085	-21	sed	21:25:25	2
22964	99	12	9,2	cyclictest	2460	-21	head	20:40:17	2
22964	99	12	9,2	cyclictest	18819	-21	head	22:20:20	2
22964	99	12	9,2	cyclictest	16768	-21	sed	21:10:19	2
22964	99	12	9,2	cyclictest	13870	-21	tr	21:05:16	2
22962	99	12	9,2	cyclictest	9976	-21	cat	19:50:00	1
22962	99	12	9,2	cyclictest	31976	-21	tr	20:35:14	1
22962	99	12	9,2	cyclictest	23839	-21	sed	20:15:27	1
22962	99	12	9,2	cyclictest	18737	-21	cat	00:35:01	1
22962	99	12	9,2	cyclictest	17384	-21	cat	23:25:00	1
22962	99	12	9,2	cyclictest	1728	-21	ls	22:50:21	1
22962	99	12	9,2	cyclictest	16270	-21	tr	21:10:16	1
22962	99	12	9,2	cyclictest	13791	-21	cat	23:15:20	1
22962	99	12	9,2	cyclictest	13163	-21	tr	22:10:14	1
22962	99	12	9,2	cyclictest	12222	-21	apt	23:15:00	1
22962	99	12	9,2	cyclictest	11554	-21	wc	19:50:21	1
22962	99	12	9,2	cyclictest	10719	-21	tr	22:05:16	1
22962	99	12	8,3	cyclictest	26832	-21	grep	22:35:22	1
22962	99	12	5,3	cyclictest	225	-21	systemd-journal	20:15:00	1
22962	99	12	2,4	cyclictest	225	-21	systemd-journal	00:06:18	1
22962	99	12	0,6	cyclictest	0	-21	swapper/1	22:55:14	1
22957	99	12	9,2	cyclictest	4615	-21	grep	22:55:26	0
22957	99	12	9,2	cyclictest	29374	-21	cat	23:49:59	0
22957	99	12	9,2	cyclictest	25112	-21	grep	19:10:26	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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