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 100 highest latencies:

System rackeslot4s.osadl.org (updated Sun Dec 07, 2025 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1982963	99	33	27,4	cyclictest	2231564	-21	/usr/sbin/munin	23:10:16	1
1982958	99	33	30,2	cyclictest	2008678	-21	kworker/u8:2+flush-259:0	20:05:18	0
1982963	99	32	27,3	cyclictest	2039590	-21	kworker/u8:0+flush-259:0	20:35:01	1
1982963	99	31	25,4	cyclictest	2039807	-21	/usr/sbin/munin	20:05:16	1
1982958	99	31	28,2	cyclictest	2138847	-21	kworker/u8:1+flush-259:0	21:55:17	0
1982958	99	31	28,2	cyclictest	2008678	-21	kworker/u8:2+events_unbound	21:05:19	0
1982967	99	30	25,3	cyclictest	3000063	-21	rs:main		2
1982967	99	30	24,4	cyclictest	1993226	-21	latency_hist	19:20:02	2
1982963	99	30	24,5	cyclictest	2132594	-21	ntpq	21:30:23	1
1982958	99	30	25,4	cyclictest	2091455	-21	latency_hist	20:55:00	0
1982958	99	30	25,3	cyclictest	2190340	-21	apt-get	22:30:12	0
1982958	99	29	23,4	cyclictest	3000063	-21	rs:main		0
1982958	99	29	22,5	cyclictest	2287661	-21	ntpq	00:00:23	0
1982967	99	28	24,3	cyclictest	2185129	-21	kworker/u8:1+flush-259:0	22:50:16	2
1982963	99	28	24,3	cyclictest	2133499	-21	kworker/u8:3+events_unbound	21:45:14	1
1982963	99	28	24,3	cyclictest	2123458	-21	kworker/u8:0+flush-259:0	21:40:23	1
1982958	99	28	23,3	cyclictest	1	-21	systemd	21:00:01	0
1982958	99	28	22,5	cyclictest	2698871	-21	systemd-journal	00:10:01	0
1982958	99	28	21,5	cyclictest	2024106	-21	latency_hist	19:50:00	0
1982963	99	27	22,3	cyclictest	2185129	-21	kworker/u8:1+events_unbound	22:35:17	1
1982967	99	26	20,4	cyclictest	2200430	-21	latency_hist	22:40:01	2
1982963	99	26	23,2	cyclictest	2159164	-21	kworker/u8:0+events_unbound	22:00:00	1
1982963	99	26	22,3	cyclictest	2283568	-21	kworker/u8:1+events_unbound	00:25:01	1
1982963	99	25	22,2	cyclictest	2304005	-21	kworker/u8:2+events_unbound	00:30:19	1
1982963	99	25	22,2	cyclictest	2174420	-21	fwupd	22:13:44	1
1982963	99	25	22,2	cyclictest	1993457	-21	kworker/u8:4+flush-259:0	19:40:26	1
1982958	99	25	23,1	cyclictest	2143603	-21	kworker/0:0+pm	22:13:45	0
1982967	99	24	18,4	cyclictest	2184898	-21	latency_hist	22:25:00	2
1982963	99	24	18,4	cyclictest	2698871	-21	systemd-journal	00:00:00	1
1982958	99	24	17,5	cyclictest	2060577	-21	latency_hist	20:25:00	0
1982958	99	23	19,3	cyclictest	2309180	-21	gpgv	00:24:59	0
1982958	99	23	19,3	cyclictest	2070871	-21	kworker/u8:3+flush-259:0	21:05:00	0
1982958	99	23	17,4	cyclictest	1992325	-21	ntpq	19:15:20	0
1982967	99	22	18,3	cyclictest	1982917	-21	kworker/u8:1+flush-259:0	19:25:17	2
1982963	99	22	19,2	cyclictest	2268154	-21	apt-get	23:45:13	1
1982963	99	22	18,3	cyclictest	2148918	-21	kworker/u8:2+events_unbound	22:00:23	1
1982963	99	22	18,3	cyclictest	1993457	-21	kworker/u8:4+flush-259:0	20:05:00	1
1982963	99	22	16,4	cyclictest	2262689	-21	latency_hist	23:40:01	1
1982958	99	22	16,4	cyclictest	2039590	-21	kworker/u8:0+flush-259:0	20:45:00	0
1982958	99	22	15,4	cyclictest	2169397	-21	latency_hist	22:10:01	0
1982969	99	21	6,6	cyclictest	2135346	-21	cut	21:35:17	3
1982969	99	21	17,3	cyclictest	2236495	-21	kworker/u8:0+flush-259:0	23:45:17	3
1982967	99	21	17,3	cyclictest	2246807	-21	latency_hist	23:25:01	2
1982967	99	21	0,3	cyclictest	2148857	-21	taskset	21:49:45	2
1982963	99	21	18,2	cyclictest	2185129	-21	kworker/u8:1+events_unbound	22:40:21	1
1982963	99	21	18,2	cyclictest	2185129	-21	kworker/u8:1+events_unbound	22:40:20	1
1982958	99	21	18,2	cyclictest	2267898	-21	munin-plugin-st	23:45:00	0
1982958	99	21	15,4	cyclictest	2698871	-21	systemd-journal	22:57:45	0
1982958	99	21	14,5	cyclictest	2185129	-21	kworker/u8:1+flush-259:0	22:45:17	0
1982958	99	21	14,5	cyclictest	2185129	-21	kworker/u8:1+flush-259:0	22:45:16	0
1982969	99	20	16,3	cyclictest	2236495	-21	kworker/u8:0+flush-259:0	00:15:16	3
1982967	99	20	0,4	cyclictest	2231115	-21	chrt	23:07:43	2
1982967	99	20	0,1	cyclictest	2225792	-21	chrt	23:00:35	2
1982963	99	20	17,2	cyclictest	2236495	-21	kworker/u8:0+events_unbound	23:30:01	1
1982963	99	20	17,2	cyclictest	2236495	-21	kworker/u8:0+events_unbound	00:10:16	1
1982963	99	20	17,2	cyclictest	2205580	-21	kworker/u8:3+flush-259:0	23:15:28	1
1982963	99	20	17,2	cyclictest	2169625	-21	kworker/u8:3+events_unbound	22:20:24	1
1982963	99	20	17,2	cyclictest	1967841	-21	kworker/u8:0+events_unbound	19:20:15	1
1982963	99	20	16,3	cyclictest	2123493	-21	apt-get	21:25:13	1
1982963	99	20	16,3	cyclictest	2039590	-21	kworker/u8:0+flush-259:0	20:40:15	1
1982958	99	20	16,3	cyclictest	2236495	-21	kworker/u8:0+flush-259:0	00:25:28	0
1982958	99	20	15,3	cyclictest	2008678	-21	kworker/u8:2+flush-259:0	21:15:25	0
1982969	99	19	9,9	cyclictest	2070381	-21	unixbench_multi	20:30:27	3
1982967	99	19	8,9	cyclictest	2288753	-21	apt-get	00:05:14	2
1982967	99	19	15,3	cyclictest	2236495	-21	kworker/u8:0+flush-259:0	23:45:16	2
1982967	99	19	15,3	cyclictest	2008678	-21	kworker/u8:2+flush-259:0	21:10:19	2
1982967	99	19	14,4	cyclictest	2117640	-21	apt-get	21:20:01	2
1982967	99	19	14,3	cyclictest	2294153	-21	cut	00:10:15	2
1982967	99	19	1,16	cyclictest	1988055	-21	idleruntime-cro	19:15:00	2
1982967	99	19	0,3	cyclictest	2153776	-21	chrt	21:52:06	2
1982963	99	19	16,2	cyclictest	2262922	-21	kworker/u8:4+flush-259:0	00:00:16	1
1982963	99	19	16,2	cyclictest	1935149	-21	kworker/u8:2+flush-259:0	19:10:24	1
1982963	99	19	15,3	cyclictest	2148918	-21	kworker/u8:2+flush-259:0	22:30:45	1
1982963	99	19	15,3	cyclictest	2008678	-21	kworker/u8:2+flush-259:0	21:05:20	1
1982963	99	19	15,2	cyclictest	2283568	-21	kworker/u8:1+events_unbound	00:20:19	1
1982963	99	19	14,3	cyclictest	2008678	-21	kworker/u8:2+events_unbound	21:20:12	1
1982958	99	19	16,2	cyclictest	2049962	-21	gpgv	20:15:00	0
1982958	99	19	13,4	cyclictest	2071088	-21	/usr/sbin/munin	20:35:20	0
1982969	99	18	6,3	cyclictest	2043808	-21	ntpq	20:05:21	3
1982969	99	18	4,4	cyclictest	1987694	-21	sshd	19:10:43	3
1982969	99	18	14,3	cyclictest	2096898	-21	apt-get	21:00:14	3
1982969	99	18	13,3	cyclictest	0	-21	swapper/3	22:45:20	3
1982969	99	18	13,3	cyclictest	0	-21	swapper/3	22:45:19	3
1982967	99	18	12,5	cyclictest	2185166	-21	apt-get	22:25:14	2
1982967	99	18	10,7	cyclictest	2050794	-21	fschecks_time	20:15:15	2
1982967	99	18	0,4	cyclictest	2278031	-21	chrt	23:53:28	2
1982967	99	18	0,3	cyclictest	2314410	-21	taskset	00:26:17	2
1982967	99	18	0,2	cyclictest	2194969	-21	chrt	22:31:45	2
1982967	99	18	0,2	cyclictest	2086091	-21	chrt	20:47:35	2
1982967	99	18	0,16	cyclictest	2044714	-21	idleruntime-cro	20:10:00	2
1982963	99	18	15,2	cyclictest	1993457	-21	kworker/u8:4+events_unbound	19:50:15	1
1982963	99	18	14,3	cyclictest	2205580	-21	kworker/u8:3+events_unbound	23:05:17	1
1982963	99	18	14,3	cyclictest	2039590	-21	kworker/u8:0+events_unbound	20:50:02	1
1982963	99	18	14,3	cyclictest	2039590	-21	kworker/u8:0+events_unbound	20:15:24	1
1982963	99	18	14,3	cyclictest	1988292	-21	kworker/u8:3+events_unbound	19:17:18	1
1982958	99	18	14,3	cyclictest	2112311	-21	gpgv	21:15:01	0
1982958	99	18	14,2	cyclictest	2133482	-21	sh	21:35:00	0
1982958	99	18	13,3	cyclictest	2698871	-21	systemd-journal	00:38:27	0
1982958	99	18	12,5	cyclictest	2204735	-21	ntpq	22:40:24	0
1982958	99	18	12,5	cyclictest	2204735	-21	ntpq	22:40:23	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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