OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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
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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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system

Characteristics of the 50 highest latencies:

System rackeslot4s.osadl.org (updated Sat Nov 08, 2025 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1520753	99	42	38,3	cyclictest	1655377	-21	kworker/u8:1+flush-259:0	21:35:01	1
1520749	99	36	30,4	cyclictest	1706758	-21	/usr/sbin/munin	22:10:16	0
1520759	99	32	27,3	cyclictest	1747906	-21	/usr/sbin/munin	22:50:16	3
1520749	99	32	25,5	cyclictest	1747665	-21	latency_hist	22:50:00	0
1520753	99	31	27,3	cyclictest	1571380	-21	kworker/u8:2+flush-259:0	20:00:25	1
1520749	99	29	23,4	cyclictest	1655377	-21	kworker/u8:1+events_unbound	21:20:19	0
1520759	99	28	24,2	cyclictest	1546535	-21	kworker/u8:0+flush-259:0	19:50:17	3
1520753	99	28	23,3	cyclictest	2698871	-21	systemd-journal	22:46:27	1
1520753	99	28	23,3	cyclictest	1758201	-21	kworker/u8:1+flush-259:0	23:25:00	1
1520753	99	27	20,5	cyclictest	1835764	-21	latency_hist	00:15:01	1
1520753	99	26	22,3	cyclictest	1571380	-21	kworker/u8:2+flush-259:0	20:00:01	1
1520749	99	26	20,4	cyclictest	2698871	-21	systemd-journal	21:51:27	0
1520749	99	26	20,4	cyclictest	2698871	-21	systemd-journal	21:51:26	0
1520749	99	26	19,5	cyclictest	1597233	-21	ntpq	20:20:21	0
1520755	99	25	18,5	cyclictest	1768659	-21	cp	23:10:02	2
1520749	99	25	18,5	cyclictest	1572315	-21	latency_hist	20:00:00	0
1520755	99	24	21,2	cyclictest	2631560	-21	kworker/u8:0+events_unbound	19:20:00	2
1520755	99	24	18,5	cyclictest	1643982	-21	ntpq	21:05:19	2
1520753	99	24	20,3	cyclictest	1753094	-21	apt-get	22:55:12	1
1520749	99	24	19,3	cyclictest	1629053	-21	kworker/u8:1+flush-259:0	21:05:09	0
1520759	99	23	20,2	cyclictest	1571380	-21	kworker/u8:2+events_unbound	20:50:15	3
1520759	99	23	18,4	cyclictest	1732482	-21	/usr/sbin/munin	22:35:12	3
1520755	99	23	20,2	cyclictest	1546535	-21	kworker/u8:0+events_unbound	19:55:00	2
1520755	99	23	20,2	cyclictest	1510687	-21	kworker/u8:1+flush-259:0	19:30:18	2
1520755	99	23	20,2	cyclictest	1510687	-21	kworker/u8:1+flush-259:0	19:30:18	2
1520749	99	23	18,4	cyclictest	1675720	-21	kworker/u8:0+events_unbound	21:45:17	0
1520749	99	23	18,4	cyclictest	1675720	-21	kworker/u8:0+events_unbound	21:45:17	0
1520749	99	23	15,6	cyclictest	2698871	-21	systemd-journal	23:00:01	0
1520759	99	22	18,3	cyclictest	1810094	-21	kworker/u8:4+flush-259:0	00:00:16	3
1520755	99	22	18,3	cyclictest	1665440	-21	kworker/u8:3+flush-259:0	21:40:00	2
1520755	99	22	16,4	cyclictest	1649972	-21	latency_hist	21:15:00	2
1520749	99	22	17,3	cyclictest	1737411	-21	kworker/u8:4+events_unbound	23:00:22	0
1520749	99	22	15,5	cyclictest	1530177	-21	ntpq	19:15:24	0
1520759	99	21	18,2	cyclictest	1804952	-21	kworker/u8:3+events_unbound	00:20:15	3
1520759	99	21	16,3	cyclictest	1742565	-21	awk	22:45:00	3
1520755	99	21	18,2	cyclictest	1567424	-21	/usr/sbin/munin	19:55:16	2
1520755	99	21	17,3	cyclictest	1571380	-21	kworker/u8:2+events_unbound	21:55:23	2
1520753	99	21	14,5	cyclictest	1789252	-21	latency_hist	23:30:00	1
1520749	99	21	18,2	cyclictest	1737411	-21	kworker/u8:4+events_unbound	22:51:27	0
1520749	99	21	18,2	cyclictest	1603335	-21	kworker/u8:0+events_unbound	20:35:24	0
1520749	99	21	17,3	cyclictest	1758201	-21	kworker/u8:1+events_unbound	23:37:27	0
1520749	99	21	17,3	cyclictest	1758201	-21	kworker/u8:1+events_unbound	23:15:15	0
1520749	99	21	17,3	cyclictest	1722196	-21	kworker/u8:3+events_unbound	22:37:36	0
1520749	99	21	17,3	cyclictest	1571380	-21	kworker/u8:2+events_unbound	20:50:02	0
1520749	99	21	15,4	cyclictest	1804952	-21	kworker/u8:3+events_unbound	00:05:12	0
1520749	99	21	15,4	cyclictest	1804952	-21	kworker/u8:3+events_unbound	00:05:11	0
1520749	99	21	14,5	cyclictest	1841334	-21	latency_hist	00:20:01	0
1520759	99	20	17,2	cyclictest	1737411	-21	kworker/u8:4+flush-259:0	23:15:01	3
1520759	99	20	16,3	cyclictest	1804952	-21	kworker/u8:3+events_unbound	00:30:02	3
1520759	99	20	16,3	cyclictest	1571380	-21	kworker/u8:2+events_unbound	20:00:25	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2021-09-01 - 00:34