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
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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 rackeslot5s.osadl.org (updated Thu Dec 25, 2025 00:44:24)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
16873	99	25	0,24	cyclictest	0	-21	swapper/3	23:00:16	3
16873	99	24	0,23	cyclictest	19713	-21	apt-get	23:40:15	3
16873	99	24	0,23	cyclictest	0	-21	swapper/3	00:00:14	3
16860	99	24	21,2	cyclictest	22895	-21	munin-run	20:30:01	0
16873	99	23	1,21	cyclictest	2505	-21	sh	22:00:00	3
16873	99	23	1,1	cyclictest	0	-21	swapper/3	23:15:16	3
16869	99	23	21,1	cyclictest	606	-21	dbus-daemon	20:15:00	2
16869	99	23	20,3	cyclictest	8992	-21	apt-get	00:25:13	2
16869	99	23	0,2	cyclictest	25281	-21	apt	20:35:01	2
16864	99	23	21,1	cyclictest	0	-21	swapper/1	00:25:00	1
16864	99	23	0,22	cyclictest	24206	-21	perf	22:45:00	1
16864	99	23	0,22	cyclictest	0	-21	swapper/1	21:20:02	1
16864	99	23	0,22	cyclictest	0	-21	swapper/1	20:35:16	1
16860	99	23	21,1	cyclictest	0	-21	swapper/0	19:55:15	0
16860	99	23	20,2	cyclictest	8731	-21	munin-run	00:25:00	0
16860	99	23	0,22	cyclictest	14593	-21	apt	22:25:01	0
16873	99	22	22,0	cyclictest	0	-21	swapper/3	20:40:14	3
16873	99	22	20,1	cyclictest	4927	-21	latency_hist	22:05:00	3
16873	99	22	19,2	cyclictest	10852	-21	cron	20:05:01	3
16873	99	22	0,21	cyclictest	0	-21	swapper/3	20:30:15	3
16873	99	22	0,21	cyclictest	0	-21	swapper/3	19:25:15	3
16873	99	22	0,1	cyclictest	19400	-21	munin-run	22:35:01	3
16869	99	22	21,1	cyclictest	13264	-21	dump-pmu-power	20:10:00	2
16869	99	22	20,2	cyclictest	14601	-21	perf	22:25:01	2
16869	99	22	19,2	cyclictest	8470	-21	idleruntime-cro	20:00:01	2
16869	99	22	19,2	cyclictest	3899	-21	basename	00:15:00	2
16869	99	22	19,2	cyclictest	30120	-21	idleruntime-cro	21:50:00	2
16869	99	22	0,21	cyclictest	336	-21	apt-get	21:55:13	2
16869	99	22	0,21	cyclictest	30048	-21	apt-get	22:55:15	2
16869	99	22	0,21	cyclictest	26902	-21	apt-get	23:55:15	2
16869	99	22	0,21	cyclictest	24226	-21	apt	23:50:01	2
16869	99	22	0,21	cyclictest	15942	-21	apt-get	20:15:15	2
16869	99	22	0,1	cyclictest	17007	-21	awk	23:35:00	2
16864	99	22	21,1	cyclictest	0	-21	swapper/1	19:25:14	1
16864	99	22	21,0	cyclictest	0	-21	swapper/1	00:25:13	1
16864	99	22	20,1	cyclictest	14859	-21	apt-get	22:25:15	1
16864	99	22	0,21	cyclictest	23199	-21	apt-get	21:35:15	1
16864	99	22	0,21	cyclictest	13830	-21	apt-get	00:35:13	1
16864	99	22	0,21	cyclictest	0	-21	swapper/1	23:45:18	1
16864	99	22	0,21	cyclictest	0	-21	swapper/1	19:35:13	1
16864	99	22	0,21	cyclictest	0	-21	swapper/1	00:15:16	1
16864	99	22	0,1	cyclictest	25616	-21	apt-get	21:40:14	1
16864	99	22	0,0	cyclictest	0	-21	swapper/1	20:05:14	1
16860	99	22	20,1	cyclictest	31545	-21	munin-run	00:05:01	0
16860	99	22	20,1	cyclictest	0	-21	swapper/0	00:25:13	0
16860	99	22	0,21	cyclictest	24193	-21	apt-get	22:45:00	0
16860	99	22	0,21	cyclictest	18409	-21	apt-get	21:25:15	0
16860	99	22	0,21	cyclictest	0	-21	swapper/0	22:25:15	0
16860	99	22	0,21	cyclictest	0	-21	swapper/0	21:00:15	0
16860	99	22	0,21	cyclictest	0	-21	swapper/0	20:40:14	0
16860	99	22	0,21	cyclictest	0	-21	swapper/0	20:35:16	0
16860	99	22	0,1	cyclictest	24019	-21	sh	19:25:00	0
16860	99	22	0,1	cyclictest	13270	-21	perf	20:10:00	0
16860	99	22	0,1	cyclictest	0	-21	swapper/0	22:45:02	0
16873	99	21	21,0	cyclictest	11153	-21	apt-get	20:05:14	3
16873	99	21	20,1	cyclictest	22113	-21	apt-get	23:45:18	3
16873	99	21	20,0	cyclictest	30367	-21	apt-get	20:45:14	3
16873	99	21	19,1	cyclictest	0	-21	swapper/3	22:50:02	3
16873	99	21	18,3	cyclictest	25557	-21	apt-get	20:35:16	3
16873	99	21	0,21	cyclictest	0	-21	swapper/3	21:10:13	3
16873	99	21	0,21	cyclictest	0	-21	swapper/3	19:35:13	3
16873	99	21	0,20	cyclictest	29172	-21	ls	21:45:22	3
16873	99	21	0,20	cyclictest	0	-21	swapper/3	22:25:15	3
16873	99	21	0,20	cyclictest	0	-21	swapper/3	21:00:00	3
16873	99	21	0,1	cyclictest	11812	-21	apt-get	23:25:02	3
16873	99	21	0,0	cyclictest	0	-21	swapper/3	23:55:16	3
16873	99	21	0,0	cyclictest	0	-21	swapper/3	20:50:14	3
16869	99	21	20,1	cyclictest	2448	-21	apt-get	23:05:14	2
16869	99	21	20,1	cyclictest	24193	-21	apt-get	22:45:02	2
16869	99	21	20,1	cyclictest	0	-21	swapper/2	19:45:16	2
16869	99	21	0,20	cyclictest	24505	-21	apt-get	23:50:15	2
16869	99	21	0,20	cyclictest	24505	-21	apt-get	23:50:15	2
16869	99	21	0,20	cyclictest	16004	-21	apt-get	21:20:15	2
16869	99	21	0,20	cyclictest	0	-21	swapper/2	20:35:16	2
16869	99	21	0,1	cyclictest	0	-21	swapper/2	23:00:16	2
16869	99	21	0,0	cyclictest	3145	-21	apt-get	20:55:15	2
16869	99	21	0,0	cyclictest	19487	-21	apt-get	19:15:12	2
16869	99	21	0,0	cyclictest	0	-21	swapper/2	22:35:15	2
16864	99	21	21,0	cyclictest	7235	-21	apt-get	23:15:16	1
16864	99	21	21,0	cyclictest	0	-21	swapper/1	22:05:14	1
16864	99	21	21,0	cyclictest	0	-21	swapper/1	20:20:15	1
16864	99	21	20,1	cyclictest	0	-21	swapper/1	22:00:13	1
16864	99	21	20,0	cyclictest	0	-21	swapper/1	22:50:15	1
16864	99	21	20,0	cyclictest	0	-21	swapper/1	22:15:17	1
16864	99	21	19,1	cyclictest	0	-21	swapper/1	22:30:15	1
16864	99	21	0,21	cyclictest	0	-21	swapper/1	19:55:15	1
16864	99	21	0,1	cyclictest	0	-21	swapper/1	20:50:01	1
16864	99	21	0,0	cyclictest	0	-21	swapper/1	23:25:02	1
16864	99	21	0,0	cyclictest	0	-21	swapper/1	22:20:15	1
16864	99	21	0,0	cyclictest	0	-21	swapper/1	21:15:15	1
16864	99	21	0,0	cyclictest	0	-21	swapper/1	21:00:15	1
16864	99	21	0,0	cyclictest	0	-21	swapper/1	20:40:14	1
16864	99	21	0,0	cyclictest	0	-21	swapper/1	20:25:12	1
16860	99	21	21,0	cyclictest	0	-21	swapper/0	19:15:12	0
16860	99	21	20,1	cyclictest	0	-21	swapper/0	22:05:14	0
16860	99	21	19,1	cyclictest	0	-21	swapper/0	22:15:17	0
16860	99	21	0,21	cyclictest	0	-21	swapper/0	21:20:02	0
16860	99	21	0,20	cyclictest	32465	-21	apt-get	23:00:16	0
16860	99	21	0,0	cyclictest	0	-21	swapper/0	21:55:13	0
16860	99	21	0,0	cyclictest	0	-21	swapper/0	21:15:15	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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