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 Thu Jun 18, 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
2724936	99	46	41,4	cyclictest	2947699	-21	kworker/u8:3+flush-259:0	12:35:00	0
2724936	99	45	40,3	cyclictest	2989713	-21	apt-get	11:25:10	0
2724936	99	45	38,5	cyclictest	2911236	-21	latency_hist	10:10:01	0
2724936	99	43	38,3	cyclictest	3057586	-21	kworker/u8:2+flush-259:0	12:40:00	0
2724940	99	42	35,4	cyclictest	2797493	-21	latency_hist	08:20:00	1
2724940	99	38	31,5	cyclictest	3015667	-21	ntpq	11:45:21	1
2724936	99	38	34,3	cyclictest	3021975	-21	apt-get	11:55:10	0
2724949	99	36	31,3	cyclictest	2777143	-21	apt-get	08:00:11	3
2724936	99	35	28,5	cyclictest	2782057	-21	latency_hist	08:05:00	0
2724940	99	34	30,2	cyclictest	3032118	-21	kworker/u8:0+flush-259:0	12:15:14	1
2724936	99	34	29,3	cyclictest	2719990	-21	kworker/u8:2+flush-259:0	07:20:01	0
2724940	99	33	28,3	cyclictest	335557	-21	systemd-journal	08:59:05	1
2724936	99	33	29,3	cyclictest	2761618	-21	apt-get	07:45:11	0
2724940	99	32	27,3	cyclictest	2854817	-21	kworker/u8:6+flush-259:0	09:40:17	1
2724940	99	32	26,4	cyclictest	2771935	-21	/usr/sbin/munin	07:55:15	1
2724936	99	32	24,6	cyclictest	3046761	-21	ntpq	12:15:23	0
2724940	99	30	26,3	cyclictest	2854279	-21	gpgv	09:15:00	1
2724936	99	30	27,2	cyclictest	2761377	-21	kworker/u8:2+flush-259:0	08:05:24	0
2724936	99	30	26,2	cyclictest	2906305	-21	kworker/u8:1+flush-259:0	10:55:20	0
2724949	99	29	21,6	cyclictest	335557	-21	systemd-journal	10:20:00	3
2724936	99	29	26,2	cyclictest	2947699	-21	kworker/u8:3+events_unbound	12:15:01	0
2724949	99	28	21,5	cyclictest	2974346	-21	diskstats	11:10:14	3
2724949	99	28	17,9	cyclictest	3021715	-21	latency_hist	11:55:01	3
2724936	99	28	24,3	cyclictest	2916603	-21	kworker/u8:0+flush-259:0	10:40:22	0
2724945	99	27	22,3	cyclictest	2724894	-21	kworker/u8:4+flush-259:0	07:20:15	2
2724940	99	27	22,4	cyclictest	2750659	-21	gpgv	07:35:01	1
2724940	99	27	22,3	cyclictest	2875437	-21	apt-get	09:35:11	1
2724936	99	27	23,3	cyclictest	2838682	-21	kworker/u8:4+flush-259:0	09:25:22	0
2724936	99	27	23,3	cyclictest	2724894	-21	kworker/u8:4+flush-259:0	07:40:01	0
2724936	99	27	21,4	cyclictest	3011133	-21	cat	11:45:00	0
2724940	99	26	21,3	cyclictest	2927343	-21	/usr/sbin/munin	10:25:16	1
2724936	99	25	22,2	cyclictest	3032118	-21	kworker/u8:0+events_unbound	12:05:13	0
2724936	99	25	20,4	cyclictest	2932158	-21	kworker/u8:2+flush-259:0	10:40:00	0
2724949	99	24	20,3	cyclictest	2932158	-21	kworker/u8:2+flush-259:0	10:40:18	3
2724949	99	24	20,3	cyclictest	2735219	-21	kworker/u8:0+flush-259:0	07:25:01	3
2724949	99	24	20,2	cyclictest	0	-21	swapper/3	11:40:01	3
2724945	99	24	18,4	cyclictest	2813374	-21	diskstats	08:35:13	2
2724936	99	24	21,2	cyclictest	21	1	rcuc/0	08:55:00	0
2724936	99	24	20,3	cyclictest	2766517	-21	kworker/u8:3+events_unbound	08:25:01	0
2724949	99	23	18,3	cyclictest	2979367	-21	apt-get	11:15:10	3
2724949	99	23	17,4	cyclictest	2740598	-21	apt-get	07:25:13	3
2724945	99	23	19,3	cyclictest	2719990	-21	kworker/u8:2+flush-259:0	07:15:16	2
2724945	99	23	17,4	cyclictest	335557	-21	systemd-journal	12:35:30	2
2724940	99	23	17,4	cyclictest	335557	-21	systemd-journal	09:05:15	1
2724940	99	23	17,4	cyclictest	2890907	-21	/usr/sbin/munin	09:50:14	1
2724940	99	23	17,4	cyclictest	2719990	-21	kworker/u8:2+flush-259:0	07:24:44	1
2724936	99	23	20,2	cyclictest	2807827	-21	kworker/u8:1+flush-259:0	08:45:00	0
2724936	99	23	19,3	cyclictest	2968372	-21	kworker/u8:0+events_unbound	11:30:28	0
2724936	99	23	19,3	cyclictest	2947699	-21	kworker/u8:3+events_unbound	11:50:28	0
2724936	99	23	19,3	cyclictest	2906305	-21	kworker/u8:1+events_unbound	11:03:11	0
2724936	99	23	18,3	cyclictest	1	-21	systemd	07:10:47	0
2724949	99	22	18,3	cyclictest	3032118	-21	kworker/u8:0+flush-259:0	12:10:14	3
2724949	99	22	12,9	cyclictest	2973709	-21	latency_hist	11:10:00	3
2724945	99	22	18,3	cyclictest	2838682	-21	kworker/u8:4+events_unbound	09:25:20	2
2724940	99	22	20,1	cyclictest	0	-21	swapper/1	10:45:00	1
2724940	99	22	18,3	cyclictest	2766517	-21	kworker/u8:3+flush-259:0	07:55:00	1
2724940	99	22	17,3	cyclictest	2994876	-21	apt-get	11:30:12	1
2724940	99	22	16,4	cyclictest	3006020	-21	/usr/sbin/munin	11:40:13	1
2724936	99	22	18,3	cyclictest	2947699	-21	kworker/u8:3+events_unbound	12:00:18	0
2724936	99	22	18,3	cyclictest	2922228	-21	apt-get	10:20:11	0
2724936	99	22	18,3	cyclictest	2875839	-21	kworker/u8:2+flush-259:0	09:40:22	0
2724949	99	21	0,19	cyclictest	2833059	-21	grep	08:50:24	3
2724945	99	21	17,3	cyclictest	3047831	-21	kworker/u8:1+flush-259:0	12:25:16	2
2724945	99	21	17,3	cyclictest	2766517	-21	kworker/u8:3+flush-259:0	08:15:15	2
2724945	99	21	15,4	cyclictest	2828620	-21	/usr/sbin/munin	08:50:12	2
2724940	99	21	15,4	cyclictest	3041524	-21	ntpq	12:10:21	1
2724936	99	21	18,2	cyclictest	2932158	-21	kworker/u8:2+flush-259:0	10:50:23	0
2724936	99	21	17,3	cyclictest	2719990	-21	kworker/u8:2+events_unbound	07:20:49	0
2724949	99	20	14,4	cyclictest	2813213	-21	apt-get	08:35:10	3
2724945	99	20	16,3	cyclictest	2766517	-21	kworker/u8:3+flush-259:0	10:00:25	2
2724945	99	20	15,3	cyclictest	2751253	-21	cat	07:35:01	2
2724945	99	20	14,4	cyclictest	3016769	-21	/usr/sbin/munin	11:50:21	2
2724940	99	20	16,3	cyclictest	3058166	-21	apt-get	12:30:11	1
2724940	99	20	15,4	cyclictest	2870276	-21	apt-get	09:30:11	1
2724940	99	20	15,3	cyclictest	2968596	-21	/usr/sbin/munin	11:05:24	1
2724940	99	20	13,5	cyclictest	3067311	-21	ntpq	12:35:18	1
2724936	99	20	17,2	cyclictest	2968372	-21	kworker/u8:0+events_unbound	11:20:01	0
2724936	99	20	16,3	cyclictest	2766517	-21	kworker/u8:3+events_unbound	08:37:05	0
2724936	99	20	16,3	cyclictest	2724894	-21	kworker/u8:4+events_unbound	07:44:52	0
2724936	99	20	16,3	cyclictest	2724894	-21	kworker/u8:4+events_unbound	07:30:21	0
2724936	99	20	15,3	cyclictest	2916370	-21	latency_hist	10:15:01	0
2724949	99	19	15,3	cyclictest	2838682	-21	kworker/u8:4+flush-259:0	09:20:00	3
2724949	99	19	14,4	cyclictest	335557	-21	systemd-journal	12:00:43	3
2724949	99	19	10,7	cyclictest	0	-21	swapper/3	11:05:00	3
2724949	99	19	0,3	cyclictest	2854168	-21	latency_hist	09:15:01	3
2724945	99	19	12,5	cyclictest	2818344	-21	/usr/sbin/munin	08:40:13	2
2724940	99	19	14,4	cyclictest	335557	-21	systemd-journal	11:40:01	1
2724940	99	19	14,4	cyclictest	335557	-21	systemd-journal	10:55:01	1
2724940	99	19	13,5	cyclictest	2761377	-21	kworker/u8:2+flush-259:0	08:05:16	1
2724940	99	19	13,4	cyclictest	335557	-21	systemd-journal	10:05:24	1
2724936	99	19	16,2	cyclictest	2854817	-21	kworker/u8:6+events_unbound	09:40:01	0
2724936	99	19	16,2	cyclictest	2766517	-21	kworker/u8:3+flush-259:0	08:15:15	0
2724936	99	19	16,2	cyclictest	0	-21	swapper/0	12:30:00	0
2724936	99	19	15,3	cyclictest	2854817	-21	kworker/u8:6+events_unbound	09:47:06	0
2724936	99	19	15,3	cyclictest	2761377	-21	kworker/u8:2+events_unbound	07:50:23	0
2724949	99	18	12,4	cyclictest	1	-21	systemd	11:42:10	3
2724949	99	18	0,4	cyclictest	3037263	-21	munin-plugin-st	12:10:01	3
2724945	99	18	14,3	cyclictest	2932158	-21	kworker/u8:2+events_unbound	10:50:20	2
2724945	99	18	12,4	cyclictest	3026891	-21	latency_hist	12:00:00	2
2724940	99	18	15,2	cyclictest	2855881	-21	kthreadcore	09:15:18	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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