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 Aug 31, 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
268447	99	74	70,3	cyclictest	75	-21	kswapd0	00:20:02	3
268447	99	59	56,2	cyclictest	278781	-21	kworker/u8:2+events_unbound	20:20:25	3
268442	99	52	45,5	cyclictest	335557	-21	systemd-journal	20:20:01	1
268444	99	50	45,4	cyclictest	75	-21	kswapd0	20:20:03	2
268442	99	50	45,4	cyclictest	497888	-21	apt-get	22:50:11	1
268444	99	49	43,4	cyclictest	523759	-21	apt-get	23:15:12	2
268442	99	49	44,3	cyclictest	497317	-21	gpgv	22:50:00	1
268444	99	48	43,4	cyclictest	388358	-21	gpgv	21:05:01	2
268442	99	43	39,3	cyclictest	294293	-21	kworker/u8:4+flush-259:0	20:10:23	1
268442	99	43	37,4	cyclictest	383108	-21	latency_hist	21:00:01	1
268437	99	42	39,2	cyclictest	278781	-21	kworker/u8:2+flush-259:0	19:30:24	0
268437	99	42	37,4	cyclictest	394132	-21	apt-get	21:10:12	0
268437	99	42	37,4	cyclictest	320896	-21	apt-get	20:00:12	0
268437	99	42	36,4	cyclictest	315764	-21	apt-get	19:55:13	0
268442	99	41	35,4	cyclictest	388930	-21	apt-get	21:05:12	1
268442	99	40	35,3	cyclictest	456133	-21	apt-get	22:10:12	1
268442	99	38	32,4	cyclictest	440599	-21	apt-get	21:55:11	1
268442	99	36	32,2	cyclictest	414799	-21	apt-get	21:30:13	1
268447	99	35	32,2	cyclictest	476815	-21	kworker/u8:1+events_unbound	23:09:17	3
268447	99	35	31,3	cyclictest	404439	-21	kworker/u8:3+flush-259:0	21:25:26	3
268437	99	35	30,3	cyclictest	466256	-21	kworker/u8:0+flush-259:0	22:25:25	0
268447	99	34	31,2	cyclictest	268056	-21	kworker/u8:3+events_unbound	19:45:23	3
268447	99	33	30,2	cyclictest	278781	-21	kworker/u8:2+events_unbound	19:55:17	3
268447	99	33	29,3	cyclictest	388458	-21	kworker/u8:2+events_unbound	21:55:22	3
268442	99	33	28,3	cyclictest	388418	-21	base64	21:05:01	1
268447	99	32	29,2	cyclictest	486737	-21	kworker/u8:0+events_unbound	23:00:14	3
268444	99	32	28,3	cyclictest	388458	-21	kworker/u8:2+flush-259:0	22:30:32	2
268442	99	32	26,4	cyclictest	425103	-21	/usr/sbin/munin	21:40:14	1
268447	99	31	28,2	cyclictest	512829	-21	kworker/u8:2+flush-259:0	23:10:21	3
268447	99	31	25,4	cyclictest	342026	-21	kworker/u8:3+flush-259:0	20:50:01	3
268447	99	30	27,2	cyclictest	565153	-21	kworker/u8:3+events_unbound	00:15:15	3
268447	99	30	27,2	cyclictest	476815	-21	kworker/u8:1+events_unbound	23:25:23	3
268444	99	30	25,3	cyclictest	476815	-21	kworker/u8:1+flush-259:0	23:05:22	2
268442	99	30	24,5	cyclictest	367843	-21	apt-get	20:45:12	1
268437	99	30	27,2	cyclictest	476815	-21	kworker/u8:1+events_unbound	23:00:17	0
268437	99	30	26,3	cyclictest	289113	-21	kworker/u8:1+flush-259:0	20:45:29	0
268447	99	29	26,2	cyclictest	528698	-21	kworker/u8:4+events_unbound	23:22:05	3
268447	99	29	26,2	cyclictest	289113	-21	kworker/u8:1+flush-259:0	21:09:18	3
268442	99	29	24,4	cyclictest	289355	-21	apt-get	19:30:12	1
268437	99	29	25,3	cyclictest	476815	-21	kworker/u8:1+flush-259:0	00:30:19	0
268442	99	28	23,4	cyclictest	278781	-21	kworker/u8:2+flush-259:0	19:40:18	1
268447	99	27	24,2	cyclictest	476815	-21	kworker/u8:1+events_unbound	22:55:17	3
268447	99	27	24,2	cyclictest	455892	-21	kworker/u8:1+flush-259:0	22:15:29	3
268447	99	27	24,2	cyclictest	388458	-21	kworker/u8:2+events_unbound	22:10:27	3
268447	99	27	24,2	cyclictest	278781	-21	kworker/u8:2+flush-259:0	19:25:15	3
268447	99	27	23,3	cyclictest	419712	-21	kworker/u8:0+events_unbound	21:45:22	3
268447	99	27	22,2	cyclictest	404439	-21	kworker/u8:3+events_unbound	21:25:00	3
268447	99	27	20,3	cyclictest	466256	-21	kworker/u8:0+events_unbound	22:25:16	3
268437	99	27	23,3	cyclictest	492076	-21	kworker/u8:2+flush-259:0	22:50:24	0
268447	99	26	20,3	cyclictest	512829	-21	kworker/u8:2+events_unbound	23:15:24	3
268444	99	26	19,5	cyclictest	335557	-21	systemd-journal	23:45:17	2
268442	99	26	22,3	cyclictest	486737	-21	kworker/u8:0+flush-259:0	23:25:16	1
268442	99	26	22,3	cyclictest	476815	-21	kworker/u8:1+flush-259:0	23:45:22	1
268437	99	26	22,3	cyclictest	476815	-21	kworker/u8:1+flush-259:0	00:15:19	0
268447	99	25	22,2	cyclictest	342026	-21	kworker/u8:3+events_unbound	20:55:14	3
268447	99	25	21,3	cyclictest	471625	-21	kworker/u8:3+events_unbound	22:40:14	3
268447	99	25	21,3	cyclictest	278781	-21	kworker/u8:2+events_unbound	19:40:19	3
268447	99	25	19,4	cyclictest	549598	-21	apt-get	23:40:12	3
268444	99	25	21,3	cyclictest	445753	-21	apt-get	22:00:10	2
268444	99	25	17,6	cyclictest	335557	-21	systemd-journal	22:30:00	2
268447	99	24	21,2	cyclictest	388458	-21	kworker/u8:2+flush-259:0	22:35:31	3
268447	99	24	21,2	cyclictest	352363	-21	kworker/u8:2+events_unbound	20:30:14	3
268447	99	24	21,2	cyclictest	289113	-21	kworker/u8:1+events_unbound	20:50:15	3
268447	99	24	20,3	cyclictest	294293	-21	kworker/u8:4+flush-259:0	20:10:16	3
268444	99	24	18,4	cyclictest	476815	-21	kworker/u8:1+flush-259:0	23:50:24	2
268444	99	24	17,5	cyclictest	451118	-21	diskstats	22:05:14	2
268442	99	24	20,3	cyclictest	335557	-21	systemd-journal	23:37:07	1
268442	99	24	18,4	cyclictest	528677	-21	latency_hist	23:20:01	1
268442	99	24	18,4	cyclictest	335557	-21	systemd-journal	19:49:55	1
268447	99	23	20,2	cyclictest	268056	-21	kworker/u8:3+events_unbound	19:18:18	3
268447	99	23	19,3	cyclictest	528698	-21	kworker/u8:4+events_unbound	23:55:28	3
268447	99	23	19,3	cyclictest	492076	-21	kworker/u8:2+events_unbound	22:53:18	3
268444	99	23	17,4	cyclictest	372752	-21	latency_hist	20:50:01	2
268444	99	23	17,4	cyclictest	335557	-21	systemd-journal	19:15:00	2
268437	99	23	20,2	cyclictest	342026	-21	kworker/u8:3+flush-259:0	20:50:21	0
268437	99	23	19,3	cyclictest	476815	-21	kworker/u8:1+flush-259:0	23:25:01	0
268437	99	23	18,4	cyclictest	476815	-21	kworker/u8:1+events_unbound	00:00:19	0
268437	99	23	17,4	cyclictest	314644	-21	ntpq	19:50:20	0
268437	99	23	17,4	cyclictest	314644	-21	ntpq	19:50:20	0
268447	99	22	19,2	cyclictest	565153	-21	kworker/u8:3+events_unbound	00:25:24	3
268447	99	22	19,2	cyclictest	445492	-21	kworker/u8:0+events_unbound	22:01:17	3
268447	99	22	19,2	cyclictest	388458	-21	kworker/u8:2+events_unbound	22:34:19	3
268447	99	22	19,2	cyclictest	388458	-21	kworker/u8:2+events_unbound	22:07:18	3
268447	99	22	19,2	cyclictest	278781	-21	kworker/u8:2+events_unbound	19:30:15	3
268447	99	22	18,3	cyclictest	388458	-21	kworker/u8:2+events_unbound	21:41:18	3
268447	99	22	18,3	cyclictest	347236	-21	apt-get	20:25:11	3
268444	99	22	18,3	cyclictest	476815	-21	kworker/u8:1+flush-259:0	00:25:26	2
268442	99	22	18,3	cyclictest	388458	-21	kworker/u8:2+flush-259:0	22:20:18	1
268437	99	22	17,4	cyclictest	289113	-21	kworker/u8:1+events_unbound	19:35:22	0
268437	99	22	17,3	cyclictest	268666	-21	apt-get	19:10:12	0
268447	99	21	18,2	cyclictest	388458	-21	kworker/u8:2+events_unbound	22:21:19	3
268447	99	21	18,2	cyclictest	336254	-21	kworker/u8:0+events_unbound	20:16:17	3
268447	99	21	18,2	cyclictest	294293	-21	kworker/u8:4+flush-259:0	19:35:26	3
268444	99	21	17,3	cyclictest	544224	-21	kworker/u8:2+flush-259:0	23:39:59	2
268444	99	21	16,4	cyclictest	309855	-21	apt-get	19:50:00	2
268444	99	21	16,4	cyclictest	257941	-21	kworker/u8:0+flush-259:0	19:20:18	2
268437	99	21	17,3	cyclictest	278781	-21	kworker/u8:2+events_unbound	20:05:21	0
268437	99	21	15,4	cyclictest	299757	-21	apt-get	19:40:12	0
268447	99	20	17,2	cyclictest	476815	-21	kworker/u8:1+events_unbound	23:50:07	3
268447	99	20	17,2	cyclictest	476815	-21	kworker/u8:1+events_unbound	23:45:14	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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