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
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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 rack7slot7s.osadl.org (updated Wed Dec 31, 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
13157	2	93	80,9	sleep0	0	-21	swapper/0	19:07:59	0
13221	2	90	76,10	sleep2	0	-21	swapper/2	19:08:49	2
12994	2	87	61,12	sleep3	0	-21	swapper/3	19:05:52	3
11177	2	77	67,6	sleep1	0	-21	swapper/1	19:05:03	1
13399	99	26	2,23	cyclictest	19832	-21	wc	22:45:00	1
13404	99	20	0,19	cyclictest	0	-21	swapper/2	22:05:15	2
13399	99	20	5,13	cyclictest	0	-21	swapper/1	20:40:14	1
13399	99	20	19,1	cyclictest	0	-21	swapper/1	23:27:29	1
13404	99	17	0,14	cyclictest	0	-21	swapper/2	20:20:13	2
13399	99	16	0,14	cyclictest	0	-21	swapper/1	21:10:18	1
13395	99	16	5,6	cyclictest	8636	-21	awk	21:14:59	0
13406	99	15	1,10	cyclictest	0	-21	swapper/3	20:50:15	3
13399	99	15	2,9	cyclictest	22008	-21	apt-get	20:35:14	1
13399	99	15	10,4	cyclictest	8901	-21	cut	00:35:18	1
13399	99	15	10,3	cyclictest	18893	-21	cut	23:50:13	1
13395	99	15	9,4	cyclictest	11194	-21	cron	21:20:00	0
13395	99	15	11,3	cyclictest	4384	-21	wc	19:55:29	0
13406	99	14	10,3	cyclictest	4887	-21	wc	00:25:28	3
13406	99	14	10,3	cyclictest	29388	-21	head	00:10:17	3
13406	99	14	10,3	cyclictest	27271	-21	sed	19:35:26	3
13404	99	14	9,4	cyclictest	17911	-21	grep	21:30:28	2
13404	99	14	10,3	cyclictest	9744	-21	sed	00:35:27	2
13404	99	14	10,3	cyclictest	10470	-21	ls	23:30:22	2
13399	99	14	9,3	cyclictest	23483	-21	tr	21:45:16	1
13395	99	14	1,6	cyclictest	5464	-21	munin-run	22:15:01	0
13395	99	14	10,3	cyclictest	31630	-21	grep	20:55:15	0
13395	99	14	10,2	cyclictest	29433	-21	wc	21:55:21	0
13395	99	14	0,7	cyclictest	0	-21	swapper/0	00:05:14	0
13395	99	14	0,13	cyclictest	22930	-21	tr	22:50:15	0
13406	99	13	9,3	cyclictest	23462	-21	grep	19:30:16	3
13406	99	13	9,3	cyclictest	12217	-21	head	21:20:16	3
13406	99	13	9,3	cyclictest	11896	-21	grep	23:35:16	3
13406	99	13	10,2	cyclictest	9770	-21	grep	00:35:27	3
13406	99	13	10,2	cyclictest	3793	-21	grep	23:15:26	3
13406	99	13	10,2	cyclictest	28638	-21	grep	21:55:15	3
13406	99	13	10,2	cyclictest	25658	-21	sort	22:55:19	3
13406	99	13	10,2	cyclictest	18778	-21	cat	23:50:01	3
13406	99	13	10,2	cyclictest	18778	-21	cat	23:50:01	3
13404	99	13	9,3	cyclictest	6518	-21	head	00:30:20	2
13404	99	13	9,3	cyclictest	23873	-21	ls	22:50:22	2
13404	99	13	9,1	cyclictest	0	-21	swapper/2	00:25:16	2
13404	99	13	3,6	cyclictest	14546	-21	apache2	21:35:14	2
13404	99	13	10,2	cyclictest	4353	-21	grep	21:05:15	2
13404	99	13	10,2	cyclictest	30379	-21	ls	20:50:23	2
13404	99	13	10,2	cyclictest	27895	-21	kill	00:06:04	2
13404	99	13	10,2	cyclictest	14231	-21	grep	19:10:17	2
13404	99	13	10,2	cyclictest	1242	-21	grep	19:50:18	2
13404	99	13	0,3	cyclictest	0	-21	swapper/2	21:40:14	2
13404	99	13	0,12	cyclictest	31901	-21	cron	23:10:00	2
13404	99	13	0,12	cyclictest	29213	-21	awk	19:40:25	2
13404	99	13	0,12	cyclictest	23328	-21	cron	00:00:01	2
13399	99	13	9,2	cyclictest	3809	-21	cat	21:05:00	1
13399	99	13	10,2	cyclictest	9115	-21	wc	20:05:25	1
13399	99	13	10,2	cyclictest	4962	-21	grep	22:10:29	1
13399	99	13	10,2	cyclictest	27667	-21	tr	23:00:16	1
13399	99	13	10,2	cyclictest	27087	-21	wc	21:50:19	1
13399	99	13	10,2	cyclictest	27087	-21	wc	21:50:19	1
13399	99	13	10,2	cyclictest	24827	-21	grep	19:30:27	1
13399	99	13	10,2	cyclictest	1645	-21	tune2fs	00:20:19	1
13399	99	13	10,2	cyclictest	13131	-21	wc	23:35:27	1
13399	99	13	10,2	cyclictest	13122	-21	tr	22:30:14	1
13399	99	13	10,2	cyclictest	11379	-21	cron	23:34:59	1
13395	99	13	9,3	cyclictest	24550	-21	grep	21:45:22	0
13395	99	13	9,2	cyclictest	20729	-21	grep	20:30:20	0
13395	99	13	9,2	cyclictest	18174	-21	cron	19:20:00	0
13395	99	13	8,4	cyclictest	3613	-21	wc	23:15:26	0
13395	99	13	6,5	cyclictest	30769	-21	/usr/sbin/munin	22:00:27	0
13395	99	13	2,5	cyclictest	1886	-21	perf	23:15:00	0
13395	99	13	2,4	cyclictest	0	-21	swapper/0	21:30:15	0
13395	99	13	10,2	cyclictest	25314	-21	cron	19:35:00	0
13395	99	13	10,2	cyclictest	25070	-21	wc	00:00:28	0
13395	99	13	10,2	cyclictest	20113	-21	wc	23:50:23	0
13395	99	13	10,2	cyclictest	17905	-21	sort	20:25:17	0
13395	99	13	10,2	cyclictest	14035	-21	grep	20:15:27	0
13395	99	13	10,2	cyclictest	10292	-21	cat	22:25:01	0
13395	99	13	10,1	cyclictest	7155	-21	grep	23:25:15	0
13406	99	12	9,2	cyclictest	32317	-21	cut	20:55:19	3
13406	99	12	9,2	cyclictest	28739	-21	grep	19:40:20	3
13406	99	12	9,2	cyclictest	28155	-21	head	23:00:17	3
13406	99	12	9,2	cyclictest	27099	-21	grep	00:05:22	3
13406	99	12	9,2	cyclictest	26780	-21	head	21:50:17	3
13406	99	12	9,2	cyclictest	26780	-21	head	21:50:17	3
13406	99	12	9,2	cyclictest	21786	-21	head	21:40:17	3
13406	99	12	9,2	cyclictest	2092	-21	grep	00:20:22	3
13406	99	12	9,2	cyclictest	19953	-21	cat	23:50:21	3
13406	99	12	9,2	cyclictest	1856	-21	cron	23:15:00	3
13406	99	12	9,2	cyclictest	16375	-21	tr	21:30:16	3
13406	99	12	9,2	cyclictest	15337	-21	grep	22:35:12	3
13406	99	12	9,2	cyclictest	10773	-21	grep	22:25:15	3
13406	99	12	8,3	cyclictest	24225	-21	cat	22:50:27	3
13406	99	12	8,2	cyclictest	8419	-21	sed	20:05:17	3
13406	99	12	8,2	cyclictest	13926	-21	cat	22:30:19	3
13406	99	12	6,2	cyclictest	225	-21	systemd-journal	20:50:00	3
13404	99	12	9,2	cyclictest	8217	-21	sed	21:10:27	2
13404	99	12	9,2	cyclictest	3259	-21	tr	23:15:19	2
13404	99	12	9,2	cyclictest	28902	-21	tr	00:10:15	2
13404	99	12	9,2	cyclictest	26083	-21	sed	20:40:27	2
13404	99	12	9,2	cyclictest	25136	-21	grep	22:55:16	2
13404	99	12	9,2	cyclictest	18108	-21	grep	23:45:27	2
13404	99	12	9,2	cyclictest	18108	-21	grep	23:45:27	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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