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 Tue Jul 28, 2026 12:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
687539	99	58	54,3	cyclictest	837650	-21	kworker/u8:3+flush-259:0	09:35:01	1
687539	99	58	54,3	cyclictest	837650	-21	kworker/u8:3+flush-259:0	09:35:00	1
687542	99	55	49,4	cyclictest	335557	-21	systemd-journal	09:30:00	2
687537	99	51	47,3	cyclictest	889549	-21	kworker/u8:0+flush-259:0	10:50:01	0
687539	99	47	43,3	cyclictest	889549	-21	kworker/u8:0+flush-259:0	10:40:02	1
687547	99	37	31,4	cyclictest	335557	-21	systemd-journal	12:00:01	3
687542	99	37	33,3	cyclictest	925741	-21	gpgv	11:00:00	2
687547	99	35	32,2	cyclictest	951638	-21	kworker/u8:3+flush-259:0	11:25:00	3
687542	99	35	30,3	cyclictest	723599	-21	apt-get	07:45:00	2
687539	99	35	32,2	cyclictest	702992	-21	kworker/u8:1+events_unbound	07:36:49	1
687539	99	35	31,3	cyclictest	889549	-21	kworker/u8:0+events_unbound	10:53:50	1
687539	99	35	29,4	cyclictest	702992	-21	kworker/u8:1+events_unbound	08:30:14	1
687539	99	34	30,3	cyclictest	972882	-21	kworker/u8:4+events_unbound	11:48:51	1
687539	99	34	30,3	cyclictest	972882	-21	kworker/u8:4+events_unbound	11:48:50	1
687539	99	34	30,3	cyclictest	941305	-21	kworker/u8:2+events_unbound	11:27:50	1
687537	99	34	29,4	cyclictest	743781	-21	ntpq	08:00:20	0
687539	99	33	30,2	cyclictest	988449	-21	kworker/u8:2+events_unbound	12:25:14	1
687539	99	33	30,2	cyclictest	682555	-21	kworker/u8:2+flush-259:0	07:15:49	1
687547	99	32	28,3	cyclictest	858605	-21	kworker/u8:3+flush-259:0	10:35:00	3
687547	99	32	28,3	cyclictest	858605	-21	kworker/u8:3+events_unbound	11:05:00	3
687539	99	32	28,3	cyclictest	702992	-21	kworker/u8:1+events_unbound	08:24:49	1
687542	99	31	25,4	cyclictest	780819	-21	latency_hist	08:40:00	2
687539	99	31	28,2	cyclictest	988449	-21	kworker/u8:2+flush-259:0	12:02:54	1
687539	99	31	28,2	cyclictest	931379	-21	kworker/u8:0+flush-259:0	11:15:51	1
687539	99	31	27,3	cyclictest	972882	-21	kworker/u8:4+flush-259:0	12:05:53	1
687539	99	31	27,3	cyclictest	957209	-21	kworker/u8:1+events_unbound	11:37:51	1
687539	99	31	27,3	cyclictest	702992	-21	kworker/u8:1+flush-259:0	08:17:47	1
687542	99	30	23,5	cyclictest	708106	-21	latency_hist	07:30:01	2
687539	99	30	27,2	cyclictest	801506	-21	kworker/u8:0+events_unbound	09:04:16	1
687539	99	30	26,3	cyclictest	988449	-21	kworker/u8:2+events_unbound	12:20:00	1
687539	99	30	26,3	cyclictest	801506	-21	kworker/u8:0+flush-259:0	09:09:50	1
687539	99	30	26,3	cyclictest	718646	-21	kworker/u8:0+events_unbound	07:43:48	1
687537	99	30	25,3	cyclictest	1024980	-21	latency_hist	12:35:01	0
687537	99	30	23,5	cyclictest	1014175	-21	apt-get	12:25:03	0
687537	99	30	15,2	cyclictest	1014185	-21	latency_hist	12:25:00	0
687539	99	29	26,2	cyclictest	765411	-21	kworker/u8:3+events_unbound	09:17:52	1
687539	99	29	25,3	cyclictest	858605	-21	kworker/u8:3+flush-259:0	10:34:39	1
687539	99	29	25,2	cyclictest	718646	-21	kworker/u8:0+flush-259:0	08:00:48	1
687537	99	29	24,3	cyclictest	713527	-21	apt-get	07:35:11	0
687539	99	28	25,2	cyclictest	858605	-21	kworker/u8:3+events_unbound	11:09:48	1
687539	99	28	25,2	cyclictest	702992	-21	kworker/u8:1+flush-259:0	08:28:47	1
687539	99	28	23,3	cyclictest	729419	-21	/usr/sbin/munin	07:50:15	1
687547	99	27	14,12	cyclictest	723804	-21	gpgv	07:45:01	3
687539	99	27	24,2	cyclictest	692851	-21	kworker/u8:3+events_unbound	07:22:48	1
687539	99	27	24,2	cyclictest	633820	-21	kworker/u8:0+events_unbound	07:29:01	1
687539	99	27	23,3	cyclictest	951638	-21	kworker/u8:3+events_unbound	11:51:53	1
687539	99	27	23,3	cyclictest	951638	-21	kworker/u8:3+events_unbound	11:51:53	1
687539	99	27	21,4	cyclictest	801660	-21	cp	09:00:00	1
687537	99	27	20,4	cyclictest	335557	-21	systemd-journal	09:26:50	0
687547	99	26	9,7	cyclictest	0	-21	swapper/3	12:30:00	3
687547	99	26	23,2	cyclictest	879546	-21	apt-get	10:15:12	3
687539	99	26	23,2	cyclictest	988449	-21	kworker/u8:2+events_unbound	12:12:54	1
687539	99	26	23,2	cyclictest	848321	-21	kworker/u8:1+events_unbound	09:46:51	1
687539	99	26	22,3	cyclictest	702992	-21	kworker/u8:1+events_unbound	07:33:47	1
687539	99	26	22,3	cyclictest	1019542	-21	kworker/u8:1+events_unbound	12:35:22	1
687539	99	26	20,4	cyclictest	335557	-21	systemd-journal	10:05:00	1
687537	99	26	20,4	cyclictest	847418	-21	ntpq	09:40:20	0
687542	99	25	19,4	cyclictest	884441	-21	latency_hist	10:20:00	2
687542	99	25	19,4	cyclictest	801577	-21	cp	09:00:00	2
687539	99	25	21,3	cyclictest	925687	-21	kworker/u8:2+flush-259:0	11:00:50	1
687537	99	25	19,4	cyclictest	883610	-21	ntpq	10:15:22	0
687547	99	24	14,8	cyclictest	702960	-21	latency_hist	07:25:01	3
687539	99	24	21,2	cyclictest	889549	-21	kworker/u8:0+flush-259:0	10:40:16	1
687539	99	24	19,3	cyclictest	760022	-21	kworker/u8:0+flush-259:0	08:42:47	1
687539	99	24	19,3	cyclictest	335557	-21	systemd-journal	07:10:46	1
687537	99	24	17,5	cyclictest	509	-21	rs:main		0
687547	99	23	19,3	cyclictest	734598	-21	apt-get	07:55:12	3
687542	99	23	19,3	cyclictest	739111	-21	apt-get	07:55:27	2
687542	99	23	17,4	cyclictest	977871	-21	latency_hist	11:50:01	2
687542	99	23	17,4	cyclictest	977871	-21	latency_hist	11:50:00	2
687539	99	23	20,2	cyclictest	822451	-21	kworker/u8:2+flush-259:0	09:40:22	1
687539	99	23	20,2	cyclictest	801506	-21	kworker/u8:0+events_unbound	09:10:15	1
687547	99	22	16,4	cyclictest	713265	-21	latency_hist	07:35:01	3
687539	99	22	18,3	cyclictest	988449	-21	kworker/u8:2+flush-259:0	12:20:22	1
687539	99	22	16,4	cyclictest	951638	-21	kworker/u8:3+events_unbound	11:55:11	1
687537	99	22	17,3	cyclictest	1003800	-21	turbostat	12:15:01	0
687537	99	22	14,6	cyclictest	852614	-21	ntpq	09:45:21	0
687547	99	21	15,4	cyclictest	755328	-21	apt-get	08:15:14	3
687547	99	21	0,10	cyclictest	754925	-21	taskset	08:13:39	3
687542	99	21	18,2	cyclictest	0	-21	swapper/2	12:10:00	2
687539	99	21	18,2	cyclictest	966419	-21	kworker/u8:0+events_unbound	11:40:22	1
687539	99	21	18,2	cyclictest	775429	-21	kworker/u8:2+flush-259:0	08:50:15	1
687539	99	21	18,2	cyclictest	775429	-21	kworker/u8:2+events_unbound	08:45:23	1
687539	99	21	17,3	cyclictest	765411	-21	kworker/u8:3+events_unbound	08:39:15	1
687539	99	21	16,3	cyclictest	848321	-21	kworker/u8:1+events_unbound	09:50:14	1
687537	99	21	17,3	cyclictest	801506	-21	kworker/u8:0+events_unbound	09:35:19	0
687537	99	21	15,4	cyclictest	976957	-21	ntpq	11:45:20	0
687537	99	21	15,4	cyclictest	976957	-21	ntpq	11:45:20	0
687537	99	21	15,4	cyclictest	765370	-21	latency_hist	08:25:01	0
687537	99	21	15,4	cyclictest	335557	-21	systemd-journal	07:42:47	0
687537	99	21	14,5	cyclictest	879279	-21	latency_hist	10:15:00	0
687537	99	21	14,5	cyclictest	790293	-21	ntpq	08:45:24	0
687542	99	20	16,3	cyclictest	0	-21	swapper/2	12:15:00	2
687539	99	20	17,2	cyclictest	1019542	-21	kworker/u8:1+flush-259:0	12:30:16	1
687539	99	20	16,3	cyclictest	951638	-21	kworker/u8:3+flush-259:0	11:22:52	1
687539	99	20	16,3	cyclictest	951638	-21	kworker/u8:3+events_unbound	11:30:15	1
687539	99	20	16,3	cyclictest	868570	-21	kworker/u8:1+flush-259:0	10:17:50	1
687539	99	20	16,3	cyclictest	822451	-21	kworker/u8:2+events_unbound	09:37:50	1
687539	99	20	16,3	cyclictest	702992	-21	kworker/u8:1+events_unbound	07:58:47	1
687539	99	20	13,5	cyclictest	873256	-21	ntpq	10:05:24	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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