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
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.

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 Mon May 25, 2026 00:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1875731	99	41	34,5	cyclictest	2214572	-21	ntpq	00:30:23	2
1875726	99	41	37,3	cyclictest	1859714	-21	kworker/u8:1+flush-259:0	21:05:17	1
1875726	99	40	37,2	cyclictest	1859714	-21	kworker/u8:1+flush-259:0	20:40:21	1
1875726	99	39	33,4	cyclictest	2006308	-21	apt-get	21:15:12	1
1875731	99	38	33,4	cyclictest	1948205	-21	ntpq	20:15:20	2
1875731	99	37	34,2	cyclictest	2072928	-21	kworker/u8:0+flush-259:0	22:45:00	2
1875736	99	36	32,3	cyclictest	1959500	-21	kworker/u8:0+flush-259:0	20:55:21	3
1875736	99	36	18,13	cyclictest	2032286	-21	diskstats	21:40:12	3
1875736	99	35	29,4	cyclictest	2194773	-21	latency_hist	00:15:01	3
1875736	99	34	30,3	cyclictest	2020670	-21	kworker/u8:2+flush-259:0	21:50:22	3
1875726	99	33	26,5	cyclictest	1979276	-21	ntpq	20:45:21	1
1875719	99	33	27,4	cyclictest	335557	-21	systemd-journal	23:55:15	0
1875719	99	33	26,4	cyclictest	1984396	-21	ntpq	20:50:20	0
1875726	99	32	29,2	cyclictest	2042233	-21	kworker/u8:0+flush-259:0	22:00:26	1
1875726	99	32	29,2	cyclictest	1859714	-21	kworker/u8:1+flush-259:0	20:20:00	1
1875726	99	32	26,4	cyclictest	335557	-21	systemd-journal	19:59:16	1
1875726	99	31	27,3	cyclictest	1859714	-21	kworker/u8:1+flush-259:0	21:40:20	1
1875726	99	31	25,5	cyclictest	1876039	-21	cat	19:10:01	1
1875719	99	31	27,3	cyclictest	2072928	-21	kworker/u8:0+flush-259:0	22:20:16	0
1875719	99	31	26,3	cyclictest	2110270	-21	kworker/u8:1+flush-259:0	23:05:17	0
1875719	99	31	26,3	cyclictest	2084254	-21	apt-get	22:30:11	0
1875731	99	30	25,4	cyclictest	2195039	-21	apt-get	00:15:12	2
1875726	99	30	25,3	cyclictest	335557	-21	systemd-journal	20:54:16	1
1875719	99	30	26,2	cyclictest	0	-21	swapper/0	22:55:17	0
1875736	99	29	25,3	cyclictest	2141412	-21	apt-get	23:21:16	3
1875726	99	29	25,3	cyclictest	2031878	-21	kworker/u8:3+flush-259:0	22:35:26	1
1875731	99	28	23,4	cyclictest	335557	-21	systemd-journal	00:22:26	2
1875726	99	28	24,3	cyclictest	2174272	-21	kworker/u8:4+events_unbound	00:10:22	1
1875726	99	28	23,3	cyclictest	2105322	-21	/usr/sbin/munin	22:50:22	1
1875726	99	28	23,3	cyclictest	1859714	-21	kworker/u8:1+events_unbound	20:10:12	1
1875726	99	28	20,5	cyclictest	509	-21	rs:main		1
1875719	99	28	24,3	cyclictest	2084639	-21	kworker/u8:2+flush-259:0	22:35:25	0
1875736	99	27	21,4	cyclictest	2094557	-21	/usr/sbin/munin	22:40:13	3
1875726	99	27	24,2	cyclictest	2078880	-21	kworker/u8:1+events_unbound	22:30:00	1
1875726	99	27	24,2	cyclictest	2072928	-21	kworker/u8:0+events_unbound	22:40:17	1
1875726	99	27	20,5	cyclictest	2042221	-21	latency_hist	21:50:00	1
1875736	99	26	22,3	cyclictest	1859714	-21	kworker/u8:1+flush-259:0	20:10:16	3
1875736	99	26	21,3	cyclictest	1901716	-21	gpgv	19:35:00	3
1875731	99	26	22,3	cyclictest	1891429	-21	kworker/u8:2+flush-259:0	20:05:17	2
1875731	99	26	0,24	cyclictest	1	-21	systemd	00:15:00	2
1875726	99	26	22,3	cyclictest	2084639	-21	kworker/u8:2+flush-259:0	23:25:25	1
1875726	99	26	22,3	cyclictest	1937960	-21	kworker/u8:3+flush-259:0	20:24:47	1
1875726	99	26	20,4	cyclictest	2210265	-21	latency_hist	00:30:00	1
1875719	99	26	1,23	cyclictest	1	-21	systemd	20:25:00	0
1875736	99	25	20,3	cyclictest	1881348	-21	apt-get	19:15:11	3
1875736	99	25	19,4	cyclictest	2026733	-21	latency_hist	21:35:01	3
1875731	99	25	20,3	cyclictest	2052519	-21	latency_hist	22:00:00	2
1875726	99	25	21,3	cyclictest	1990732	-21	kworker/u8:3+events_unbound	21:00:22	1
1875726	99	25	20,3	cyclictest	2121278	-21	apt-get	23:05:09	1
1875726	99	25	18,5	cyclictest	2047606	-21	/usr/sbin/munin	21:55:14	1
1875726	99	25	18,4	cyclictest	509	-21	rs:main		1
1875719	99	25	19,4	cyclictest	2215395	-21	latency_hist	00:35:01	0
1875736	99	24	17,6	cyclictest	0	-21	swapper/3	22:15:00	3
1875726	99	24	20,3	cyclictest	1859714	-21	kworker/u8:1+flush-259:0	19:45:23	1
1875726	99	24	17,5	cyclictest	335557	-21	systemd-journal	22:25:00	1
1875719	99	24	21,2	cyclictest	1896553	-21	kworker/u8:4+flush-259:0	19:35:17	0
1875719	99	24	1,21	cyclictest	1	-21	systemd	00:01:26	0
1875736	99	23	17,4	cyclictest	1974970	-21	latency_hist	20:45:01	3
1875736	99	23	12,10	cyclictest	1907536	-21	/usr/sbin/munin	19:40:14	3
1875731	99	23	20,2	cyclictest	1891390	-21	idleruntime-cro	19:25:00	2
1875731	99	23	16,5	cyclictest	2016431	-21	latency_hist	21:25:00	2
1875726	99	23	20,2	cyclictest	1896553	-21	kworker/u8:4+flush-259:0	19:50:20	1
1875726	99	23	19,3	cyclictest	1959500	-21	kworker/u8:0+events_unbound	20:30:25	1
1875726	99	23	19,3	cyclictest	1859714	-21	kworker/u8:1+events_unbound	21:12:18	1
1875726	99	23	18,4	cyclictest	2174272	-21	kworker/u8:4+flush-259:0	00:05:28	1
1875726	99	23	18,3	cyclictest	2110270	-21	kworker/u8:1+events_unbound	23:00:23	1
1875726	99	23	16,4	cyclictest	1969778	-21	latency_hist	20:40:01	1
1875736	99	22	17,4	cyclictest	2120584	-21	apt-get	23:05:00	3
1875736	99	22	17,3	cyclictest	335557	-21	systemd-journal	23:49:16	3
1875731	99	22	15,5	cyclictest	2189583	-21	latency_hist	00:10:01	2
1875726	99	22	18,3	cyclictest	2110506	-21	apt-get	22:55:11	1
1875726	99	22	18,3	cyclictest	2084639	-21	kworker/u8:2+events_unbound	23:14:18	1
1875726	99	22	18,3	cyclictest	2020670	-21	kworker/u8:2+events_unbound	21:25:23	1
1875726	99	22	18,3	cyclictest	1891429	-21	kworker/u8:2+flush-259:0	19:40:21	1
1875726	99	22	17,3	cyclictest	2110270	-21	kworker/u8:1+flush-259:0	23:15:20	1
1875726	99	22	16,4	cyclictest	1886487	-21	/usr/sbin/munin	19:20:14	1
1875719	99	22	19,2	cyclictest	2031878	-21	kworker/u8:3+events_unbound	22:25:19	0
1875719	99	22	18,3	cyclictest	1896553	-21	kworker/u8:4+events_unbound	19:50:19	0
1875719	99	22	17,3	cyclictest	1881315	-21	kworker/u8:3+flush-259:0	19:25:25	0
1875719	99	22	16,4	cyclictest	2199955	-21	latency_hist	00:20:01	0
1875736	99	21	17,3	cyclictest	2072928	-21	kworker/u8:0+flush-259:0	22:50:26	3
1875736	99	21	17,3	cyclictest	1859714	-21	kworker/u8:1+flush-259:0	20:25:16	3
1875731	99	21	18,2	cyclictest	1985548	-21	kworker/u8:2+flush-259:0	21:10:21	2
1875731	99	21	16,3	cyclictest	1902352	-21	/usr/sbin/munin	19:35:15	2
1875731	99	21	15,5	cyclictest	1859714	-21	kworker/u8:1+flush-259:0	20:30:17	2
1875731	99	21	13,5	cyclictest	1990492	-21	latency_hist	21:00:00	2
1875726	99	21	19,1	cyclictest	2157484	-21	kworker/u8:1+events_unbound	23:56:15	1
1875726	99	21	18,2	cyclictest	2072928	-21	kworker/u8:0+flush-259:0	22:32:32	1
1875726	99	21	18,2	cyclictest	1859714	-21	kworker/u8:1+events_unbound	21:35:18	1
1875726	99	21	18,2	cyclictest	1859714	-21	kworker/u8:1+events_unbound	21:35:17	1
1875726	99	21	17,3	cyclictest	2199980	-21	kworker/u8:0+events_unbound	00:20:14	1
1875726	99	21	17,3	cyclictest	1859714	-21	kworker/u8:1+flush-259:0	22:09:47	1
1875726	99	21	16,3	cyclictest	335557	-21	systemd-journal	00:40:00	1
1875726	99	21	15,4	cyclictest	335557	-21	systemd-journal	19:34:16	1
1875719	99	21	18,2	cyclictest	2120623	-21	apt-key	23:04:59	0
1875719	99	21	17,3	cyclictest	2215665	-21	apt-get	00:35:13	0
1875719	99	21	17,3	cyclictest	2031878	-21	kworker/u8:3+flush-259:0	22:40:16	0
1875719	99	21	17,3	cyclictest	1964906	-21	apt-get	20:35:13	0
1875736	99	20	6,12	cyclictest	513	-21	gdbus	00:30:00	3
1875736	99	20	14,4	cyclictest	1990734	-21	/usr/sbin/munin	21:00:14	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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