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 Sun May 03, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2123696	99	48	42,4	cyclictest	2341286	-21	apt-get	10:40:12	1
2123704	99	45	39,4	cyclictest	252	-21	systemd-journal	10:55:15	3
2123696	99	40	33,5	cyclictest	2367031	-21	apt-get	11:05:11	1
2123704	99	39	32,5	cyclictest	2268398	-21	latency_hist	09:30:01	3
2123699	99	39	35,3	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	08:50:14	2
2123699	99	38	33,3	cyclictest	252	-21	systemd-journal	09:02:09	2
2123696	99	38	33,4	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	09:40:23	1
2123694	99	37	33,3	cyclictest	2366534	-21	kworker/u8:3+flush-259:0	11:15:21	0
2123696	99	35	29,4	cyclictest	252	-21	systemd-journal	08:57:11	1
2123694	99	35	31,3	cyclictest	2371928	-21	kworker/u8:0+flush-259:0	11:20:15	0
2123694	99	35	31,3	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	07:50:23	0
2123696	99	34	30,3	cyclictest	2371928	-21	kworker/u8:0+events_unbound	11:25:21	1
2123694	99	33	30,2	cyclictest	2371928	-21	kworker/u8:0+flush-259:0	11:15:01	0
2123694	99	33	29,2	cyclictest	2258088	-21	true	09:19:59	0
2123694	99	32	28,3	cyclictest	2139398	-21	apt-get	07:25:12	0
2123704	99	31	24,5	cyclictest	2288560	-21	ntpq	09:45:20	3
2123696	99	31	26,4	cyclictest	2361863	-21	/usr/sbin/munin	11:00:15	1
2123694	99	30	26,3	cyclictest	252	-21	systemd-journal	08:45:00	0
2123699	99	29	24,3	cyclictest	2325848	-21	apt-get	10:25:13	2
2123704	99	28	22,4	cyclictest	2377329	-21	/usr/sbin/munin	11:15:20	3
2123696	99	28	24,3	cyclictest	2118546	-21	kworker/u8:0+events_unbound	07:20:21	1
2123696	99	28	23,3	cyclictest	2180702	-21	apt-get	08:05:11	1
2123694	99	28	24,3	cyclictest	2123887	-21	kworker/u8:1+events_unbound	09:40:22	0
2123694	99	28	23,3	cyclictest	2408039	-21	kworker/u8:1+events_unbound	11:49:59	0
2123694	99	28	22,5	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	09:10:01	0
2123696	99	27	24,2	cyclictest	2377113	-21	kworker/u8:1+flush-259:0	11:20:01	1
2123696	99	27	20,5	cyclictest	2403129	-21	apt-get	11:40:13	1
2123694	99	27	23,3	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	07:10:24	0
2123694	99	27	22,4	cyclictest	2263481	-21	/usr/sbin/munin	09:25:24	0
2123694	99	27	22,3	cyclictest	2170375	-21	apt-get	07:55:13	0
2123694	99	27	20,5	cyclictest	2324713	-21	ntpq	10:20:20	0
2123696	99	26	23,2	cyclictest	2206110	-21	kworker/u8:0+flush-259:0	08:30:20	1
2123696	99	26	22,3	cyclictest	2330757	-21	kworker/u8:1+events_unbound	10:55:23	1
2123696	99	26	22,3	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	07:10:20	1
2123696	99	26	20,4	cyclictest	2377091	-21	latency_hist	11:15:01	1
2123696	99	26	19,5	cyclictest	2153758	-21	ntpq	07:35:19	1
2123694	99	26	22,3	cyclictest	2273586	-21	kworker/u8:2+flush-259:0	10:15:25	0
2123694	99	26	22,3	cyclictest	2273586	-21	kworker/u8:2+flush-259:0	10:15:24	0
2123699	99	25	22,2	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	08:35:21	2
2123699	99	25	20,4	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	09:25:23	2
2123696	99	25	22,2	cyclictest	64996	-21	kworker/u8:2+events_unbound	07:15:23	1
2123696	99	25	22,2	cyclictest	2408039	-21	kworker/u8:1+events_unbound	11:50:14	1
2123696	99	25	21,3	cyclictest	2408040	-21	kworker/u8:4+events_unbound	11:55:25	1
2123696	99	25	21,3	cyclictest	2118546	-21	kworker/u8:0+events_unbound	07:40:21	1
2123696	99	25	20,4	cyclictest	2258065	-21	latency_hist	09:20:00	1
2123696	99	25	20,3	cyclictest	2170337	-21	kworker/u8:3+flush-259:0	07:55:17	1
2123694	99	25	21,3	cyclictest	2408039	-21	kworker/u8:1+events_unbound	11:55:29	0
2123694	99	25	21,3	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	08:10:21	0
2123694	99	25	19,4	cyclictest	2435188	-21	diskstats	12:10:13	0
2123694	99	25	19,4	cyclictest	2200131	-21	ntpq	08:20:20	0
2123694	99	25	18,5	cyclictest	2396880	-21	ntpq	11:30:21	0
2123694	99	25	18,5	cyclictest	2315242	-21	latency_hist	10:15:01	0
2123699	99	24	19,3	cyclictest	2300001	-21	/usr/sbin/munin	10:00:14	2
2123699	99	24	18,4	cyclictest	2346583	-21	diskstats	10:45:14	2
2123699	99	24	17,5	cyclictest	252	-21	systemd-journal	11:05:01	2
2123696	99	24	20,3	cyclictest	2309450	-21	kworker/u8:4+flush-259:0	10:30:22	1
2123696	99	24	20,3	cyclictest	2118546	-21	kworker/u8:0+flush-259:0	08:05:00	1
2123694	99	24	21,2	cyclictest	2330757	-21	kworker/u8:1+flush-259:0	10:45:01	0
2123694	99	24	20,3	cyclictest	2309450	-21	kworker/u8:4+events_unbound	10:10:01	0
2123694	99	24	20,3	cyclictest	2309450	-21	kworker/u8:4+events_unbound	10:10:00	0
2123694	99	24	20,3	cyclictest	2263008	-21	kworker/u8:0+events_unbound	09:30:19	0
2123694	99	24	20,3	cyclictest	2118546	-21	kworker/u8:0+events_unbound	07:35:23	0
2123694	99	24	19,4	cyclictest	2123887	-21	kworker/u8:1+events_unbound	08:00:12	0
2123699	99	23	19,3	cyclictest	2408039	-21	kworker/u8:1+flush-259:0	12:20:16	2
2123696	99	23	19,3	cyclictest	2330757	-21	kworker/u8:1+events_unbound	10:45:16	1
2123694	99	23	18,4	cyclictest	2263008	-21	kworker/u8:0+events_unbound	09:35:02	0
2123694	99	23	17,4	cyclictest	2222297	-21	apt-get	08:45:12	0
2123694	99	23	17,4	cyclictest	2195928	-21	kworker/u8:2+flush-259:0	08:25:20	0
2123704	99	22	18,2	cyclictest	2330975	-21	apt-get	10:30:10	3
2123704	99	22	17,3	cyclictest	2253192	-21	apt-get	09:15:11	3
2123704	99	22	17,3	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	10:05:18	3
2123704	99	22	17,3	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	10:05:17	3
2123704	99	22	16,4	cyclictest	2414280	-21	/usr/sbin/munin	11:50:20	3
2123704	99	22	16,4	cyclictest	2211720	-21	awk	08:35:01	3
2123699	99	22	17,4	cyclictest	2309450	-21	kworker/u8:4+flush-259:0	10:30:24	2
2123696	99	22	18,3	cyclictest	2263008	-21	kworker/u8:0+events_unbound	09:35:16	1
2123694	99	22	18,3	cyclictest	2408040	-21	kworker/u8:4+events_unbound	12:35:21	0
2123694	99	22	18,3	cyclictest	2118546	-21	kworker/u8:0+events_unbound	07:30:25	0
2123694	99	22	17,4	cyclictest	2206110	-21	kworker/u8:0+events_unbound	09:14:50	0
2123694	99	22	17,3	cyclictest	64996	-21	kworker/u8:2+flush-259:0	07:15:20	0
2123699	99	21	17,3	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	09:10:17	2
2123699	99	21	17,2	cyclictest	509	-21	rs:main		2
2123696	99	21	18,2	cyclictest	2273586	-21	kworker/u8:2+events_unbound	09:45:22	1
2123696	99	21	17,3	cyclictest	2170337	-21	kworker/u8:3+events_unbound	08:10:15	1
2123696	99	21	16,3	cyclictest	2408698	-21	apt-get	11:45:13	1
2123696	99	21	15,4	cyclictest	252	-21	systemd-journal	10:25:00	1
2123694	99	21	18,2	cyclictest	2371928	-21	kworker/u8:0+flush-259:0	12:20:21	0
2123694	99	21	18,2	cyclictest	2206110	-21	kworker/u8:0+flush-259:0	08:50:22	0
2123694	99	21	17,3	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	09:05:00	0
2123694	99	21	14,5	cyclictest	252	-21	systemd-journal	11:55:00	0
2123704	99	20	17,2	cyclictest	2366534	-21	kworker/u8:3+flush-259:0	11:30:17	3
2123699	99	20	15,4	cyclictest	2289134	-21	kworker/u8:0+flush-259:0	09:59:59	2
2123696	99	20	17,2	cyclictest	2371928	-21	kworker/u8:0+events_unbound	12:25:23	1
2123696	99	20	17,2	cyclictest	2118546	-21	kworker/u8:0+events_unbound	07:30:23	1
2123696	99	20	16,3	cyclictest	2123887	-21	kworker/u8:1+flush-259:0	08:55:00	1
2123696	99	20	14,4	cyclictest	2201287	-21	/usr/sbin/munin	08:25:17	1
2123694	99	20	16,3	cyclictest	2371928	-21	kworker/u8:0+events_unbound	12:05:22	0
2123694	99	20	16,3	cyclictest	2366534	-21	kworker/u8:3+flush-259:0	11:10:00	0
2123694	99	20	13,5	cyclictest	2138289	-21	ntpq	07:20:21	0
2123699	99	19	14,4	cyclictest	2268830	-21	diskstats	09:30:14	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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