OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 rackeslot5s.osadl.org (updated Fri Jan 02, 2026 00:44:23)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3838	99	24	23,1	cyclictest	13785	-21	apt-get	19:30:56	3
3833	99	24	0,1	cyclictest	622	-21	gdbus	19:20:00	2
3829	99	24	0,0	cyclictest	0	-21	swapper/1	19:50:55	1
3824	99	24	0,23	cyclictest	3622	-21	perf	23:35:01	0
3838	99	23	23,0	cyclictest	24348	-21	apt-get	23:10:59	3
3838	99	23	22,1	cyclictest	0	-21	swapper/3	19:45:55	3
3838	99	23	0,22	cyclictest	23765	-21	munin-run	00:15:01	3
3833	99	23	21,1	cyclictest	3362	-21	sendmail-msp	00:40:01	2
3833	99	23	0,2	cyclictest	17550	-21	basename	21:50:01	2
3829	99	23	21,1	cyclictest	20578	-21	apt-get	21:55:02	1
3829	99	23	21,1	cyclictest	14747	-21	apt-get	22:50:57	1
3829	99	23	0,2	cyclictest	15689	-21	latency_hist	00:00:00	1
3829	99	23	0,22	cyclictest	3354	-21	apt-get	00:40:01	1
3829	99	23	0,22	cyclictest	26411	-21	turbostat	23:15:00	1
3829	99	23	0,22	cyclictest	2329	-21	cron	22:25:00	1
3824	99	23	0,2	cyclictest	16499	-21	apt-get	00:00:55	0
3824	99	23	0,22	cyclictest	17551	-21	turbostat.cron	21:50:01	0
3824	99	23	0,22	cyclictest	13258	-21	sh	23:55:00	0
3824	99	23	0,22	cyclictest	0	-21	swapper/0	00:00:01	0
3838	99	22	20,1	cyclictest	30686	-21	cron	21:10:01	3
3838	99	22	19,2	cyclictest	643	-21	awk	21:15:01	3
3838	99	22	0,21	cyclictest	25492	-21	apt-get	22:05:55	3
3838	99	22	0,21	cyclictest	15494	-21	apt-get	21:45:56	3
3838	99	22	0,21	cyclictest	13271	-21	perf	23:55:00	3
3838	99	22	0,21	cyclictest	11033	-21	apt-get	20:30:55	3
3833	99	22	22,0	cyclictest	0	-21	swapper/2	00:30:57	2
3833	99	22	20,1	cyclictest	5868	-21	awk	20:20:01	2
3833	99	22	20,1	cyclictest	5868	-21	awk	20:20:01	2
3833	99	22	20,1	cyclictest	28807	-21	latency_hist	23:20:00	2
3833	99	22	20,1	cyclictest	0	-21	swapper/2	21:55:02	2
3833	99	22	0,21	cyclictest	23468	-21	munin-run	19:50:00	2
3833	99	22	0,21	cyclictest	20960	-21	apt-get	00:10:02	2
3833	99	22	0,21	cyclictest	13822	-21	apt-get	20:35:54	2
3833	99	22	0,21	cyclictest	0	-21	swapper/2	22:35:01	2
3833	99	22	0,21	cyclictest	0	-21	swapper/2	22:15:57	2
3833	99	22	0,21	cyclictest	0	-21	swapper/2	20:00:02	2
3833	99	22	0,1	cyclictest	606	-21	dbus-daemon	23:55:00	2
3833	99	22	0,1	cyclictest	16022	-21	wc	00:00:01	2
3833	99	22	0,1	cyclictest	0	-21	swapper/2	00:00:02	2
3829	99	22	20,1	cyclictest	18323	-21	apt-get	20:45:02	1
3829	99	22	20,1	cyclictest	15653	-21	apt-get	00:00:02	1
3829	99	22	0,21	cyclictest	6193	-21	apt-get	20:20:58	1
3829	99	22	0,21	cyclictest	14430	-21	sleep	22:50:01	1
3829	99	22	0,21	cyclictest	0	-21	swapper/1	19:20:56	1
3829	99	22	0,21	cyclictest	0	-21	swapper/1	00:20:57	1
3829	99	22	0,1	cyclictest	23825	-21	apt-get	20:55:56	1
3829	99	22	0,0	cyclictest	0	-21	swapper/1	20:25:55	1
3824	99	22	20,1	cyclictest	609	-21	rs:main		0
3824	99	22	20,1	cyclictest	22730	-21	sendmail	22:00:01	0
3824	99	22	0,21	cyclictest	15906	-21	perf	20:40:00	0
3824	99	22	0,0	cyclictest	0	-21	swapper/0	21:50:59	0
3838	99	21	19,1	cyclictest	3443	-21	perf	20:15:01	3
3838	99	21	0,20	cyclictest	32702	-21	apt-get	22:20:58	3
3838	99	21	0,20	cyclictest	0	-21	swapper/3	21:00:54	3
3838	99	21	0,20	cyclictest	0	-21	swapper/3	19:25:54	3
3838	99	21	0,20	cyclictest	0	-21	swapper/3	00:05:58	3
3838	99	21	0,1	cyclictest	0	-21	swapper/3	23:45:01	3
3838	99	21	0,0	cyclictest	3940	-21	apt-get	23:35:55	3
3833	99	21	20,1	cyclictest	9955	-21	apt-get	22:40:57	2
3833	99	21	19,1	cyclictest	21952	-21	apt-get	23:05:56	2
3833	99	21	19,1	cyclictest	15170	-21	apt	21:45:01	2
3833	99	21	19,1	cyclictest	0	-21	swapper/2	22:25:00	2
3833	99	21	0,20	cyclictest	3415	-21	cron	20:15:01	2
3833	99	21	0,20	cyclictest	26178	-21	apt-get	19:55:55	2
3833	99	21	0,1	cyclictest	25886	-21	sh	21:00:01	2
3833	99	21	0,0	cyclictest	3438	-21	apt-get	21:20:58	2
3833	99	21	0,0	cyclictest	0	-21	swapper/2	21:15:55	2
3829	99	21	21,0	cyclictest	0	-21	swapper/1	21:15:55	1
3829	99	21	21,0	cyclictest	0	-21	swapper/1	21:10:56	1
3829	99	21	20,1	cyclictest	1360	-21	apt-get	20:10:58	1
3829	99	21	19,1	cyclictest	3940	-21	apt-get	23:35:55	1
3829	99	21	0,20	cyclictest	0	-21	swapper/1	22:10:57	1
3829	99	21	0,0	cyclictest	0	-21	swapper/1	21:50:59	1
3824	99	21	21,0	cyclictest	0	-21	swapper/0	20:45:02	0
3824	99	21	21,0	cyclictest	0	-21	swapper/0	20:10:58	0
3824	99	21	20,1	cyclictest	28268	-21	apt-get	20:00:02	0
3824	99	21	20,1	cyclictest	0	-21	swapper/0	19:50:00	0
3824	99	21	19,1	cyclictest	3378	-21	awk	00:40:01	0
3824	99	21	19,1	cyclictest	0	-21	swapper/0	00:30:57	0
3824	99	21	0,21	cyclictest	0	-21	swapper/0	19:15:54	0
3824	99	21	0,20	cyclictest	25899	-21	ls	21:00:01	0
3824	99	21	0,20	cyclictest	0	-21	swapper/0	23:40:59	0
3824	99	21	0,0	cyclictest	26739	-21	apt-get	23:15:56	0
3824	99	21	0,0	cyclictest	0	-21	swapper/0	22:40:57	0
3838	99	20	20,0	cyclictest	8993	-21	apt-get	19:20:56	3
3838	99	20	20,0	cyclictest	26510	-21	apt-get	00:20:58	3
3838	99	20	20,0	cyclictest	1002	-21	apt-get	21:15:55	3
3838	99	20	20,0	cyclictest	0	-21	swapper/3	22:50:58	3
3838	99	20	20,0	cyclictest	0	-21	swapper/3	21:30:57	3
3838	99	20	20,0	cyclictest	0	-21	swapper/3	20:50:56	3
3838	99	20	20,0	cyclictest	0	-21	swapper/3	19:50:55	3
3838	99	20	20,0	cyclictest	0	-21	swapper/3	00:15:57	3
3838	99	20	19,1	cyclictest	16184	-21	apt-get	19:35:56	3
3838	99	20	18,1	cyclictest	14409	-21	dump-pmu-power	22:50:01	3
3838	99	20	0,20	cyclictest	0	-21	swapper/3	23:05:56	3
3838	99	20	0,0	cyclictest	5836	-21	apt-get	21:25:56	3
3838	99	20	0,0	cyclictest	31384	-21	apt-get	20:05:55	3
3838	99	20	0,0	cyclictest	0	-21	swapper/3	22:35:58	3
3838	99	20	0,0	cyclictest	0	-21	swapper/3	00:36:00	3
3838	99	20	0,0	cyclictest	0	-21	swapper/3	00:25:59	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2020-09-17 - 11:29