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 50 highest latencies:

System rackeslot4s.osadl.org (updated Sun Jun 14, 2026 00:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3003166	99	46	39,5	cyclictest	3335457	-21	ntpq	00:25:21	1
3003168	99	43	39,3	cyclictest	3131977	-21	kworker/u8:0+flush-259:0	21:40:20	2
3003168	99	43	38,3	cyclictest	3221664	-21	kworker/u8:1+events_unbound	00:00:22	2
3003168	99	39	36,2	cyclictest	3163268	-21	kworker/u8:1+flush-259:0	22:10:18	2
3003168	99	39	35,3	cyclictest	3131977	-21	kworker/u8:0+events_unbound	21:30:20	2
3003166	99	39	33,4	cyclictest	3200368	-21	base64	22:20:00	1
3003166	99	39	33,4	cyclictest	3127201	-21	latency_hist	21:10:01	1
3003172	99	38	31,5	cyclictest	3210920	-21	latency_hist	22:30:00	3
3003168	99	37	34,2	cyclictest	3221664	-21	kworker/u8:1+events_unbound	23:10:21	2
3003168	99	36	32,3	cyclictest	3309759	-21	kworker/u8:2+flush-259:0	00:35:23	2
3003168	99	36	29,5	cyclictest	3070561	-21	latency_hist	20:15:01	2
3003166	99	35	28,5	cyclictest	3215658	-21	ntpq	22:30:22	1
3003161	99	34	31,2	cyclictest	3195076	-21	kworker/u8:0+flush-259:0	22:55:15	0
3003161	99	34	29,4	cyclictest	3110842	-21	ntpq	20:50:22	0
3003172	99	32	28,3	cyclictest	3132333	-21	latency_hist	21:15:01	3
3003168	99	32	29,2	cyclictest	3116919	-21	kworker/u8:3+events_unbound	21:35:17	2
3003168	99	32	28,3	cyclictest	3242234	-21	kworker/u8:3+events_unbound	23:05:20	2
3003168	99	32	28,3	cyclictest	3116919	-21	kworker/u8:3+flush-259:0	21:20:16	2
3003168	99	31	28,2	cyclictest	3163268	-21	kworker/u8:1+flush-259:0	22:25:00	2
3003168	99	31	28,2	cyclictest	3163268	-21	kworker/u8:1+flush-259:0	22:20:00	2
3003168	99	31	25,4	cyclictest	3242482	-21	apt-get	23:00:11	2
3003168	99	31	25,4	cyclictest	3242482	-21	apt-get	23:00:10	2
3003161	99	31	26,4	cyclictest	3065369	-21	latency_hist	20:10:01	0
3003172	99	30	25,4	cyclictest	3163268	-21	kworker/u8:1+flush-259:0	22:10:01	3
3003172	99	30	25,3	cyclictest	3023727	-21	apt-get	19:30:03	3
3003168	99	30	27,2	cyclictest	3065604	-21	kworker/u8:1+flush-259:0	20:30:17	2
3003168	99	30	26,3	cyclictest	3221664	-21	kworker/u8:1+events_unbound	23:30:14	2
3003168	99	30	26,3	cyclictest	3163268	-21	kworker/u8:1+events_unbound	21:55:16	2
3003168	99	30	25,3	cyclictest	3013469	-21	kworker/u8:0+events_unbound	19:40:21	2
3003168	99	29	26,2	cyclictest	3242234	-21	kworker/u8:3+events_unbound	23:25:12	2
3003168	99	29	26,2	cyclictest	3003357	-21	kworker/u8:4+flush-259:0	20:40:15	2
3003168	99	29	26,2	cyclictest	3003357	-21	kworker/u8:4+flush-259:0	20:40:15	2
3003168	99	29	25,3	cyclictest	3309759	-21	kworker/u8:2+events_unbound	00:25:18	2
3003168	99	29	25,3	cyclictest	3116919	-21	kworker/u8:3+flush-259:0	21:50:24	2
3003168	99	29	24,4	cyclictest	3221664	-21	kworker/u8:1+events_unbound	22:45:19	2
3003161	99	29	0,28	cyclictest	1	-21	systemd	19:50:33	0
3003161	99	29	0,27	cyclictest	1	-21	systemd	22:53:32	0
3003168	99	28	25,2	cyclictest	3309759	-21	kworker/u8:2+events_unbound	00:05:19	2
3003168	99	28	25,2	cyclictest	3195076	-21	kworker/u8:0+flush-259:0	22:40:24	2
3003168	99	28	24,3	cyclictest	3221664	-21	kworker/u8:1+events_unbound	23:35:22	2
3003168	99	28	24,3	cyclictest	3184916	-21	kworker/u8:4+flush-259:0	22:35:24	2
3003166	99	28	23,3	cyclictest	3070788	-21	kworker/u8:3+events_unbound	20:15:23	1
3003161	99	28	24,3	cyclictest	3190107	-21	apt-get	22:10:09	0
3003172	99	27	23,3	cyclictest	3163268	-21	kworker/u8:1+events_unbound	21:55:20	3
3003172	99	27	20,5	cyclictest	3023946	-21	cat	19:30:01	3
3003168	99	27	24,2	cyclictest	3221664	-21	kworker/u8:1+flush-259:0	23:15:16	2
3003168	99	27	24,2	cyclictest	3003357	-21	kworker/u8:4+flush-259:0	19:50:21	2
3003168	99	27	23,3	cyclictest	3242234	-21	kworker/u8:3+flush-259:0	23:20:25	2
3003168	99	27	23,3	cyclictest	3013469	-21	kworker/u8:0+events_unbound	19:30:21	2
3003172	99	26	22,3	cyclictest	3242234	-21	kworker/u8:3+flush-259:0	23:40:00	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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