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 Jul 09, 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
2709480	99	51	44,5	cyclictest	3031002	-21	latency_hist	12:20:00	2
2709477	99	46	42,3	cyclictest	2917080	-21	kworker/u8:0+flush-259:0	11:20:01	1
2709477	99	45	41,3	cyclictest	2651091	-21	kworker/u8:3+events_unbound	07:20:01	1
2709475	99	44	39,4	cyclictest	2735180	-21	latency_hist	07:35:01	0
2709477	99	43	40,2	cyclictest	2676993	-21	kworker/u8:1+events_unbound	07:20:21	1
2709477	99	42	39,2	cyclictest	2917080	-21	kworker/u8:0+flush-259:0	10:30:18	1
2709477	99	41	38,2	cyclictest	2917080	-21	kworker/u8:0+flush-259:0	11:10:25	1
2709480	99	40	34,4	cyclictest	335557	-21	systemd-journal	11:55:00	2
2709480	99	40	34,4	cyclictest	2725113	-21	/usr/sbin/munin	07:25:13	2
2709477	99	40	36,3	cyclictest	2891920	-21	kworker/u8:3+events_unbound	10:50:24	1
2709477	99	40	36,3	cyclictest	2719945	-21	kworker/u8:0+events_unbound	08:00:01	1
2709477	99	39	36,2	cyclictest	3015494	-21	kworker/u8:3+events_unbound	12:10:22	1
2709477	99	39	35,3	cyclictest	2901539	-21	kworker/u8:1+events_unbound	10:20:02	1
2709477	99	39	35,3	cyclictest	2676993	-21	kworker/u8:1+events_unbound	07:10:11	1
2709475	99	39	0,38	cyclictest	1	-21	systemd	08:27:24	0
2709477	99	38	35,2	cyclictest	2813236	-21	kworker/u8:1+events_unbound	09:45:25	1
2709477	99	37	33,3	cyclictest	2781274	-21	kworker/u8:3+events_unbound	08:25:01	1
2709477	99	37	33,3	cyclictest	2745493	-21	kworker/u8:1+events_unbound	08:05:02	1
2709477	99	36	33,2	cyclictest	2813236	-21	kworker/u8:1+events_unbound	09:20:20	1
2709477	99	36	32,3	cyclictest	2942827	-21	kworker/u8:4+events_unbound	11:10:00	1
2709475	99	36	32,3	cyclictest	2917080	-21	kworker/u8:0+flush-259:0	11:00:20	0
2709477	99	34	30,3	cyclictest	2973780	-21	kworker/u8:1+flush-259:0	11:40:25	1
2709477	99	34	30,3	cyclictest	2973780	-21	kworker/u8:1+events_unbound	12:00:25	1
2709475	99	34	25,6	cyclictest	2818786	-21	latency_hist	08:55:00	0
2709485	99	33	27,4	cyclictest	2751043	-21	latency_hist	07:50:01	3
2709477	99	33	30,2	cyclictest	3015494	-21	kworker/u8:3+events_unbound	12:35:14	1
2709477	99	32	29,2	cyclictest	2932517	-21	kworker/u8:2+events_unbound	10:55:25	1
2709477	99	32	27,3	cyclictest	2745688	-21	gpgv	07:45:01	1
2709477	99	32	25,5	cyclictest	2734285	-21	ntpq	07:30:21	1
2709475	99	32	27,4	cyclictest	2839638	-21	apt-get	09:15:13	0
2709477	99	31	28,2	cyclictest	2973808	-21	kworker/u8:2+events_unbound	11:36:24	1
2709477	99	31	28,2	cyclictest	2973780	-21	kworker/u8:1+events_unbound	11:25:31	1
2709477	99	31	28,2	cyclictest	2839412	-21	kworker/u8:2+events_unbound	09:25:24	1
2709477	99	31	27,3	cyclictest	2917080	-21	kworker/u8:0+flush-259:0	11:05:01	1
2709477	99	31	27,3	cyclictest	2807634	-21	kworker/u8:4+flush-259:0	08:45:20	1
2709477	99	31	27,3	cyclictest	2807131	-21	kworker/u8:0+events_unbound	09:36:25	1
2709475	99	31	28,2	cyclictest	2942827	-21	kworker/u8:4+flush-259:0	11:05:21	0
2709475	99	31	24,4	cyclictest	2714573	-21	latency_hist	07:15:01	0
2709477	99	30	27,2	cyclictest	2864280	-21	kworker/u8:2+events_unbound	09:40:25	1
2709477	99	30	27,2	cyclictest	2745493	-21	kworker/u8:1+events_unbound	07:55:23	1
2709475	99	30	26,3	cyclictest	2917080	-21	kworker/u8:0+events_unbound	11:00:01	0
2709475	99	30	26,3	cyclictest	2719945	-21	kworker/u8:0+events_unbound	07:45:02	0
2709480	99	29	24,3	cyclictest	2876076	-21	/usr/sbin/munin	09:50:15	2
2709480	99	29	23,4	cyclictest	2740338	-21	latency_hist	07:40:01	2
2709477	99	29	26,2	cyclictest	3020864	-21	kworker/u8:0+events_unbound	12:18:25	1
2709477	99	29	26,2	cyclictest	2906774	-21	kworker/u8:2+events_unbound	10:25:12	1
2709477	99	29	26,2	cyclictest	2839412	-21	kworker/u8:2+flush-259:0	09:15:17	1
2709477	99	29	26,2	cyclictest	2676993	-21	kworker/u8:1+events_unbound	07:25:22	1
2709475	99	29	24,4	cyclictest	3020864	-21	kworker/u8:0+flush-259:0	12:15:00	0
2709485	99	28	16,10	cyclictest	2917320	-21	apt-get	10:30:10	3
2709480	99	28	23,4	cyclictest	2792827	-21	/usr/sbin/munin	08:30:19	2
2709477	99	28	25,2	cyclictest	2901539	-21	kworker/u8:1+events_unbound	10:40:24	1
2709477	99	28	25,2	cyclictest	2781274	-21	kworker/u8:3+events_unbound	08:34:26	1
2709477	99	28	25,2	cyclictest	2756600	-21	kworker/u8:2+events_unbound	08:20:22	1
2709477	99	28	25,2	cyclictest	2651091	-21	kworker/u8:3+events_unbound	07:35:22	1
2709477	99	28	24,3	cyclictest	2891920	-21	kworker/u8:3+events_unbound	10:16:24	1
2709477	99	28	24,3	cyclictest	2719945	-21	kworker/u8:0+events_unbound	08:13:26	1
2709485	99	27	21,4	cyclictest	3041253	-21	latency_hist	12:30:01	3
2709480	99	27	14,11	cyclictest	2874986	-21	ntpq	09:45:23	2
2709477	99	27	24,3	cyclictest	2745493	-21	kworker/u8:1+events_unbound	07:50:13	1
2709477	99	27	23,3	cyclictest	2870690	-21	kworker/u8:3+flush-259:0	09:50:25	1
2709477	99	27	23,3	cyclictest	2870690	-21	kworker/u8:3+events_unbound	09:57:25	1
2709477	99	27	23,3	cyclictest	2807131	-21	kworker/u8:0+events_unbound	09:00:12	1
2709475	99	27	23,3	cyclictest	2781274	-21	kworker/u8:3+flush-259:0	08:30:24	0
2709480	99	26	20,4	cyclictest	335557	-21	systemd-journal	07:44:59	2
2709477	99	26	23,2	cyclictest	3015494	-21	kworker/u8:3+events_unbound	12:25:17	1
2709477	99	26	22,3	cyclictest	2891920	-21	kworker/u8:3+events_unbound	10:07:27	1
2709477	99	26	22,3	cyclictest	2807634	-21	kworker/u8:4+events_unbound	08:50:23	1
2709475	99	26	22,3	cyclictest	2891920	-21	kworker/u8:3+events_unbound	10:05:25	0
2709475	99	26	22,3	cyclictest	2745493	-21	kworker/u8:1+flush-259:0	07:54:51	0
2709475	99	26	22,3	cyclictest	2719945	-21	kworker/u8:0+flush-259:0	08:05:21	0
2709485	99	25	20,3	cyclictest	2876101	-21	apt-get	09:50:12	3
2709485	99	25	19,4	cyclictest	335557	-21	systemd-journal	10:22:24	3
2709485	99	25	18,5	cyclictest	335557	-21	systemd-journal	09:00:00	3
2709477	99	25	22,2	cyclictest	3015494	-21	kworker/u8:3+events_unbound	12:05:23	1
2709477	99	25	22,2	cyclictest	2917080	-21	kworker/u8:0+events_unbound	11:21:25	1
2709477	99	25	22,2	cyclictest	2813236	-21	kworker/u8:1+events_unbound	08:55:12	1
2709477	99	25	21,3	cyclictest	3015494	-21	kworker/u8:3+events_unbound	12:24:26	1
2709475	99	25	19,4	cyclictest	335557	-21	systemd-journal	12:25:00	0
2709485	99	24	20,3	cyclictest	2989501	-21	apt-get	11:40:11	3
2709480	99	24	20,3	cyclictest	3046444	-21	apt-get	12:35:00	2
2709480	99	24	12,10	cyclictest	3046968	-21	cat	12:35:01	2
2709477	99	24	20,3	cyclictest	3005331	-21	kworker/u8:2+flush-259:0	11:55:21	1
2709477	99	24	20,3	cyclictest	3005331	-21	kworker/u8:2+flush-259:0	11:55:20	1
2709477	99	24	20,3	cyclictest	2891920	-21	kworker/u8:3+events_unbound	10:45:13	1
2709475	99	24	21,2	cyclictest	2917080	-21	kworker/u8:0+flush-259:0	10:30:23	0
2709475	99	24	20,3	cyclictest	2973780	-21	kworker/u8:1+events_unbound	11:40:23	0
2709480	99	23	19,3	cyclictest	2973780	-21	kworker/u8:1+flush-259:0	12:25:01	2
2709480	99	23	19,3	cyclictest	2891920	-21	kworker/u8:3+flush-259:0	11:00:00	2
2709477	99	23	19,3	cyclictest	2781274	-21	kworker/u8:3+events_unbound	08:40:15	1
2709485	99	22	15,6	cyclictest	0	-21	swapper/3	10:15:00	3
2709485	99	22	1,20	cyclictest	3051620	-21	sshd	12:35:25	3
2709480	99	22	19,2	cyclictest	3005121	-21	kworker/u8:0+flush-259:0	12:00:01	2
2709480	99	22	19,2	cyclictest	3005121	-21	kworker/u8:0+flush-259:0	12:00:00	2
2709480	99	22	18,3	cyclictest	2973808	-21	kworker/u8:2+flush-259:0	11:39:55	2
2709475	99	22	19,2	cyclictest	3047096	-21	kworker/u8:4+events_unbound	12:40:00	0
2709475	99	22	19,2	cyclictest	2917080	-21	kworker/u8:0+flush-259:0	11:10:18	0
2709475	99	22	18,3	cyclictest	3015494	-21	kworker/u8:3+events_unbound	12:10:00	0
2709475	99	22	17,4	cyclictest	2756600	-21	kworker/u8:2+flush-259:0	08:20:21	0
2709485	99	21	8,2	cyclictest	2860276	-21	cpuspeed_turbos	09:35:11	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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