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 Sat Sep 19, 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
2239495	99	51	48,2	cyclictest	2421480	-21	kworker/u8:3+events_unbound	23:15:23	3
2239492	99	49	43,4	cyclictest	2390101	-21	kworker/u8:1+flush-259:0	21:35:26	2
2239481	99	45	40,4	cyclictest	2504449	-21	apt-get	23:25:12	0
2239481	99	43	38,3	cyclictest	2260695	-21	apt-get	19:30:10	0
2239488	99	41	35,4	cyclictest	2255229	-21	latency_hist	19:25:01	1
2239481	99	38	35,2	cyclictest	2363801	-21	kworker/u8:0+flush-259:0	22:59:59	0
2239495	99	37	30,5	cyclictest	2394745	-21	ntpq	21:35:23	3
2239488	99	37	33,3	cyclictest	2343129	-21	kworker/u8:3+flush-259:0	20:55:25	1
2239495	99	35	32,2	cyclictest	2462907	-21	kworker/u8:2+flush-259:0	23:15:00	3
2239495	99	35	32,2	cyclictest	2462907	-21	kworker/u8:2+flush-259:0	23:14:59	3
2239495	99	35	31,3	cyclictest	2515230	-21	apt-get	23:35:13	3
2239488	99	35	31,3	cyclictest	2363801	-21	kworker/u8:0+events_unbound	22:50:17	1
2239492	99	34	29,4	cyclictest	2411365	-21	/usr/sbin/munin	21:55:13	2
2239488	99	34	29,3	cyclictest	2520386	-21	/usr/sbin/munin	23:40:15	1
2239481	99	34	30,3	cyclictest	2234101	-21	kworker/u8:3+flush-259:0	19:35:22	0
2239495	99	33	29,3	cyclictest	509	-21	rs:main		3
2239481	99	33	28,3	cyclictest	2530741	-21	apt-get	23:50:12	0
2239495	99	32	29,2	cyclictest	2363801	-21	kworker/u8:0+flush-259:0	21:50:16	3
2239495	99	32	26,5	cyclictest	2291856	-21	diskstats	20:00:13	3
2239492	99	31	27,3	cyclictest	335557	-21	systemd-journal	19:35:50	2
2239488	99	31	26,3	cyclictest	2541210	-21	apt-get	00:00:10	1
2239481	99	31	26,4	cyclictest	335557	-21	systemd-journal	21:15:03	0
2239492	99	29	23,4	cyclictest	2483591	-21	latency_hist	23:05:00	2
2239488	99	29	25,3	cyclictest	2421480	-21	kworker/u8:3+flush-259:0	23:05:24	1
2239481	99	29	25,3	cyclictest	2363801	-21	kworker/u8:0+flush-259:0	22:20:16	0
2239492	99	28	23,4	cyclictest	2493921	-21	kworker/u8:0+flush-259:0	23:30:00	2
2239492	99	28	22,4	cyclictest	335557	-21	systemd-journal	22:44:24	2
2239488	99	28	25,2	cyclictest	2520377	-21	kworker/u8:3+events_unbound	23:55:14	1
2239488	99	28	25,2	cyclictest	2447370	-21	kworker/u8:1+flush-259:0	22:49:59	1
2239488	99	28	24,3	cyclictest	2473500	-21	apt-get	22:55:11	1
2239488	99	28	24,3	cyclictest	2462907	-21	kworker/u8:2+flush-259:0	23:20:17	1
2239488	99	28	24,3	cyclictest	2343129	-21	kworker/u8:3+events_unbound	21:30:13	1
2239488	99	28	24,3	cyclictest	2239960	-21	apt-get	19:10:11	1
2239488	99	28	23,3	cyclictest	2567106	-21	apt-get	00:25:12	1
2239488	99	28	22,4	cyclictest	2551352	-21	latency_hist	00:10:01	1
2239481	99	28	22,4	cyclictest	335557	-21	systemd-journal	21:02:24	0
2239495	99	27	24,2	cyclictest	2421480	-21	kworker/u8:3+events_unbound	22:25:17	3
2239495	99	27	24,2	cyclictest	2186232	-21	kworker/u8:1+flush-259:0	19:20:10	3
2239495	99	27	23,3	cyclictest	2561925	-21	/usr/sbin/munin	00:20:13	3
2239495	99	27	23,3	cyclictest	2186232	-21	kworker/u8:1+events_unbound	19:30:21	3
2239495	99	27	21,5	cyclictest	335557	-21	systemd-journal	20:30:01	3
2239492	99	27	22,4	cyclictest	335557	-21	systemd-journal	23:45:01	2
2239492	99	27	22,4	cyclictest	2432079	-21	apt-get	22:15:13	2
2239488	99	27	22,3	cyclictest	2322776	-21	apt-get	20:30:11	1
2239481	99	27	24,2	cyclictest	2421480	-21	kworker/u8:3+flush-259:0	22:15:17	0
2239481	99	27	22,3	cyclictest	2493921	-21	kworker/u8:0+flush-259:0	23:30:15	0
2239481	99	27	21,4	cyclictest	2291435	-21	latency_hist	20:00:01	0
2239488	99	26	21,4	cyclictest	335557	-21	systemd-journal	21:36:14	1
2239488	99	26	21,4	cyclictest	2401083	-21	apt-get	21:45:12	1
2239488	99	26	20,5	cyclictest	2411390	-21	apt-get	21:55:11	1
2239488	99	26	20,4	cyclictest	2337973	-21	latency_hist	20:45:00	1
2239481	99	26	22,3	cyclictest	2504416	-21	kworker/u8:1+flush-259:0	23:35:18	0
2239481	99	26	21,4	cyclictest	2411168	-21	kworker/u8:2+flush-259:0	22:10:18	0
2239481	99	26	21,3	cyclictest	2296840	-21	kworker/u8:3+flush-259:0	20:05:17	0
2239481	99	26	1,23	cyclictest	509	-21	rs:main		0
2239495	99	25	22,3	cyclictest	2363801	-21	kworker/u8:0+events_unbound	21:20:13	3
2239495	99	25	22,2	cyclictest	2421480	-21	kworker/u8:3+events_unbound	22:40:00	3
2239495	99	25	22,2	cyclictest	2363801	-21	kworker/u8:0+flush-259:0	22:55:16	3
2239495	99	25	21,3	cyclictest	2411168	-21	kworker/u8:2+events_unbound	21:55:22	3
2239495	99	25	20,3	cyclictest	2483829	-21	/usr/sbin/munin	23:05:21	3
2239495	99	25	19,4	cyclictest	2520377	-21	kworker/u8:3+flush-259:0	23:45:01	3
2239495	99	25	19,4	cyclictest	2510025	-21	/usr/sbin/munin	23:30:20	3
2239495	99	25	18,5	cyclictest	2286247	-21	latency_hist	19:55:01	3
2239492	99	25	21,3	cyclictest	2343129	-21	kworker/u8:3+flush-259:0	21:30:24	2
2239481	99	25	19,4	cyclictest	2577213	-21	latency_hist	00:35:01	0
2239495	99	24	20,3	cyclictest	2363801	-21	kworker/u8:0+events_unbound	21:40:11	3
2239495	99	24	20,3	cyclictest	2270761	-21	kworker/u8:2+events_unbound	20:20:15	3
2239492	99	24	21,2	cyclictest	2363801	-21	kworker/u8:0+flush-259:0	22:55:21	2
2239488	99	24	20,3	cyclictest	2421480	-21	kworker/u8:3+events_unbound	23:10:24	1
2239488	99	24	20,3	cyclictest	2421480	-21	kworker/u8:3+events_unbound	23:10:24	1
2239495	99	23	19,3	cyclictest	2363801	-21	kworker/u8:0+events_unbound	22:45:25	3
2239495	99	23	18,3	cyclictest	2421480	-21	kworker/u8:3+flush-259:0	23:00:26	3
2239495	99	23	17,4	cyclictest	335557	-21	systemd-journal	22:05:23	3
2239492	99	23	19,3	cyclictest	2245114	-21	apt-get	19:15:11	2
2239488	99	23	19,3	cyclictest	2421480	-21	kworker/u8:3+flush-259:0	23:00:20	1
2239488	99	23	18,4	cyclictest	2270761	-21	kworker/u8:2+events_unbound	20:10:15	1
2239488	99	23	18,4	cyclictest	2270761	-21	kworker/u8:2+events_unbound	19:45:17	1
2239488	99	23	18,3	cyclictest	2363801	-21	kworker/u8:0+flush-259:0	21:15:24	1
2239488	99	23	17,5	cyclictest	2509732	-21	cp	23:30:01	1
2239495	99	22	18,3	cyclictest	2520377	-21	kworker/u8:3+events_unbound	00:00:21	3
2239495	99	22	18,3	cyclictest	2363801	-21	kworker/u8:0+events_unbound	21:45:21	3
2239495	99	22	17,4	cyclictest	2363801	-21	kworker/u8:0+events_unbound	22:20:01	3
2239495	99	22	17,4	cyclictest	2363801	-21	kworker/u8:0+events_unbound	21:14:25	3
2239495	99	22	16,4	cyclictest	2390101	-21	kworker/u8:1+flush-259:0	22:00:17	3
2239492	99	22	18,3	cyclictest	2520377	-21	kworker/u8:3+flush-259:0	23:55:17	2
2239492	99	22	18,3	cyclictest	2286480	-21	kworker/u8:0+flush-259:0	20:00:01	2
2239488	99	22	18,3	cyclictest	2421480	-21	kworker/u8:3+flush-259:0	22:10:00	1
2239488	99	22	18,3	cyclictest	2186232	-21	kworker/u8:1+flush-259:0	19:30:23	1
2239495	99	21	16,4	cyclictest	2343129	-21	kworker/u8:3+events_unbound	21:05:28	3
2239492	99	21	17,3	cyclictest	2270761	-21	kworker/u8:2+events_unbound	20:10:20	2
2239488	99	21	17,3	cyclictest	3838517	-21	kworker/u8:0+events_unbound	19:40:12	1
2239488	99	21	17,3	cyclictest	2530498	-21	kworker/u8:0+events_unbound	23:50:24	1
2239488	99	21	17,3	cyclictest	2363801	-21	kworker/u8:0+flush-259:0	21:25:14	1
2239488	99	21	15,4	cyclictest	2332793	-21	latency_hist	20:40:01	1
2239481	99	21	18,2	cyclictest	2473225	-21	cron	22:55:00	0
2239481	99	21	17,3	cyclictest	2463146	-21	apt-get	22:45:09	0
2239481	99	21	16,4	cyclictest	509	-21	rs:main		0
2239481	99	21	16,4	cyclictest	335557	-21	systemd-journal	21:30:00	0
2239481	99	21	14,5	cyclictest	2462025	-21	ntpq	22:40:23	0
2239495	99	20	16,3	cyclictest	2551585	-21	kworker/u8:0+flush-259:0	00:38:34	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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