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 Jun 16, 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
527751	99	50	43,5	cyclictest	335557	-21	systemd-journal	07:45:01	2
527746	99	46	41,3	cyclictest	824300	-21	kworker/u8:1+flush-259:0	11:55:01	1
527746	99	45	37,5	cyclictest	599948	-21	ntpq	08:15:22	1
527746	99	43	39,3	cyclictest	814025	-21	kworker/u8:4+flush-259:0	12:35:01	1
527753	99	42	37,3	cyclictest	575256	-21	/usr/sbin/munin	07:55:23	3
527751	99	39	32,5	cyclictest	585327	-21	latency_hist	08:05:01	2
527746	99	39	32,5	cyclictest	761206	-21	ntpq	10:50:23	1
527753	99	37	32,3	cyclictest	621374	-21	ntpq	08:35:23	3
527746	99	37	33,3	cyclictest	814025	-21	kworker/u8:4+events_unbound	12:15:17	1
527751	99	36	29,5	cyclictest	335557	-21	systemd-journal	10:51:24	2
527753	99	34	30,3	cyclictest	543687	-21	kworker/u8:0+flush-259:0	07:45:01	3
527746	99	34	31,2	cyclictest	507302	-21	kworker/u8:3+flush-259:0	07:30:16	1
527746	99	33	29,3	cyclictest	543905	-21	/usr/sbin/munin	07:25:15	1
527743	99	33	27,4	cyclictest	595611	-21	latency_hist	08:15:00	0
527753	99	32	27,3	cyclictest	736372	-21	kworker/u8:0+flush-259:0	11:40:00	3
527751	99	32	27,3	cyclictest	335557	-21	systemd-journal	10:48:24	2
527746	99	32	28,3	cyclictest	720961	-21	kworker/u8:1+events_unbound	11:33:25	1
527746	99	32	28,3	cyclictest	648429	-21	kworker/u8:0+flush-259:0	09:15:20	1
527743	99	32	28,3	cyclictest	829723	-21	apt-get	12:00:09	0
527753	99	31	27,3	cyclictest	720961	-21	kworker/u8:1+flush-259:0	11:45:01	3
527746	99	31	28,2	cyclictest	814025	-21	kworker/u8:4+events_unbound	11:55:18	1
527746	99	31	27,3	cyclictest	690132	-21	kworker/u8:3+events_unbound	10:05:23	1
527743	99	31	25,4	cyclictest	870845	-21	latency_hist	12:40:01	0
527751	99	30	26,3	cyclictest	767191	-21	gpgv	11:00:00	2
527746	99	30	25,3	cyclictest	632727	-21	gpgv	08:50:00	1
527746	99	30	25,3	cyclictest	335557	-21	systemd-journal	07:22:21	1
527746	99	30	24,4	cyclictest	643535	-21	/usr/sbin/munin	09:00:20	1
527753	99	29	23,4	cyclictest	509	-21	rs:main		3
527746	99	29	26,2	cyclictest	569672	-21	kworker/u8:1+events_unbound	07:55:02	1
527746	99	29	25,3	cyclictest	720961	-21	kworker/u8:1+events_unbound	10:40:24	1
527746	99	29	23,2	cyclictest	569672	-21	kworker/u8:1+events_unbound	08:25:22	1
527746	99	29	22,5	cyclictest	538266	-21	cp	07:20:01	1
527743	99	29	24,4	cyclictest	335557	-21	systemd-journal	10:39:59	0
527746	99	28	24,3	cyclictest	824300	-21	kworker/u8:1+events_unbound	12:05:00	1
527746	99	28	24,3	cyclictest	690132	-21	kworker/u8:3+events_unbound	09:48:23	1
527753	99	27	22,3	cyclictest	569672	-21	kworker/u8:1+flush-259:0	08:20:16	3
527753	99	27	21,4	cyclictest	335557	-21	systemd-journal	08:02:20	3
527746	99	27	23,3	cyclictest	585558	-21	kworker/u8:2+events_unbound	08:32:21	1
527746	99	27	20,5	cyclictest	705507	-21	latency_hist	10:00:01	1
527743	99	27	21,4	cyclictest	854439	-21	ntpq	12:20:20	0
527753	99	26	21,4	cyclictest	648429	-21	kworker/u8:0+events_unbound	09:50:22	3
527753	99	26	20,4	cyclictest	616818	-21	cp	08:35:00	3
527746	99	26	22,3	cyclictest	580181	-21	kworker/u8:0+flush-259:0	08:00:18	1
527746	99	26	18,3	cyclictest	648429	-21	kworker/u8:0+events_unbound	09:25:00	1
527743	99	26	19,5	cyclictest	782145	-21	ntpq	11:10:20	0
527743	99	26	19,5	cyclictest	553114	-21	ntpq	07:30:21	0
527753	99	25	21,3	cyclictest	736372	-21	kworker/u8:0+flush-259:0	11:25:01	3
527753	99	25	21,3	cyclictest	736372	-21	kworker/u8:0+flush-259:0	11:25:00	3
527753	99	25	19,4	cyclictest	720961	-21	kworker/u8:1+flush-259:0	10:25:17	3
527746	99	25	22,2	cyclictest	667924	-21	kworker/u8:2+flush-259:0	09:40:16	1
527746	99	25	21,3	cyclictest	736372	-21	kworker/u8:0+events_unbound	11:15:24	1
527746	99	25	21,3	cyclictest	690132	-21	kworker/u8:3+flush-259:0	10:04:22	1
527743	99	25	9,5	cyclictest	834863	-21	apt-get	12:05:11	0
527743	99	25	19,4	cyclictest	819401	-21	apt-get	11:50:12	0
527753	99	24	19,3	cyclictest	663858	-21	latency_hist	09:20:00	3
527746	99	24	20,3	cyclictest	736372	-21	kworker/u8:0+flush-259:0	10:35:18	1
527746	99	24	20,3	cyclictest	627608	-21	kworker/u8:4+flush-259:0	09:05:15	1
527746	99	24	20,3	cyclictest	569672	-21	kworker/u8:1+events_unbound	08:10:21	1
527746	99	24	15,7	cyclictest	638115	-21	idleruntime-cro	08:55:01	1
527743	99	24	7,3	cyclictest	335557	-21	systemd-journal	12:14:55	0
527743	99	24	0,23	cyclictest	1	-21	systemd	07:36:20	0
527753	99	23	19,3	cyclictest	648429	-21	kworker/u8:0+flush-259:0	09:30:21	3
527753	99	23	17,5	cyclictest	860508	-21	turbostat	12:30:01	3
527753	99	23	17,4	cyclictest	553996	-21	latency_hist	07:35:01	3
527751	99	23	19,3	cyclictest	611186	-21	gpgv	08:30:00	2
527751	99	23	19,3	cyclictest	335557	-21	systemd-journal	09:39:06	2
527746	99	23	20,2	cyclictest	569672	-21	kworker/u8:1+flush-259:0	08:08:47	1
527746	99	23	19,3	cyclictest	736372	-21	kworker/u8:0+events_unbound	11:25:18	1
527746	99	23	19,3	cyclictest	522430	-21	kworker/u8:1+events_unbound	07:44:20	1
527753	99	22	18,3	cyclictest	814025	-21	kworker/u8:4+events_unbound	11:55:25	3
527753	99	22	17,3	cyclictest	335557	-21	systemd-journal	07:28:20	3
527753	99	22	1,19	cyclictest	1	-21	systemd	11:03:24	3
527746	99	22	19,2	cyclictest	720961	-21	kworker/u8:1+events_unbound	10:20:21	1
527746	99	22	18,3	cyclictest	616671	-21	kworker/u8:3+events_unbound	08:35:15	1
527743	99	22	18,3	cyclictest	746877	-21	/usr/sbin/munin	10:40:20	0
527743	99	22	18,3	cyclictest	720961	-21	kworker/u8:1+flush-259:0	11:35:00	0
527743	99	22	17,3	cyclictest	772731	-21	turbostat	11:05:00	0
527743	99	22	0,2	cyclictest	736371	-21	awk	10:30:00	0
527753	99	21	17,3	cyclictest	335557	-21	systemd-journal	07:20:01	3
527753	99	21	15,4	cyclictest	532917	-21	latency_hist	07:15:01	3
527753	99	21	14,5	cyclictest	574762	-21	base64	07:55:01	3
527751	99	21	18,2	cyclictest	0	-21	swapper/2	10:40:00	2
527746	99	21	17,3	cyclictest	736372	-21	kworker/u8:0+flush-259:0	12:05:26	1
527746	99	21	17,3	cyclictest	690132	-21	kworker/u8:3+events_unbound	10:12:23	1
527746	99	21	17,3	cyclictest	648429	-21	kworker/u8:0+events_unbound	09:10:23	1
527746	99	21	17,3	cyclictest	548846	-21	kworker/u8:4+flush-259:0	07:45:11	1
527743	99	21	7,2	cyclictest	568535	-21	ntpq	07:45:20	0
527743	99	21	18,2	cyclictest	720961	-21	kworker/u8:1+flush-259:0	10:20:21	0
527743	99	21	18,2	cyclictest	0	-21	swapper/0	08:35:00	0
527743	99	21	17,3	cyclictest	814025	-21	kworker/u8:4+flush-259:0	11:55:24	0
527753	99	20	15,4	cyclictest	638352	-21	/usr/sbin/munin	08:55:13	3
527753	99	20	15,4	cyclictest	638352	-21	/usr/sbin/munin	08:55:13	3
527751	99	20	11,7	cyclictest	0	-21	swapper/2	08:35:00	2
527746	99	20	17,2	cyclictest	616671	-21	kworker/u8:3+events_unbound	08:40:15	1
527746	99	20	16,3	cyclictest	648429	-21	kworker/u8:0+events_unbound	10:15:24	1
527746	99	20	15,3	cyclictest	731483	-21	/usr/sbin/munin	10:25:22	1
527743	99	20	15,4	cyclictest	569672	-21	kworker/u8:1+flush-259:0	08:03:50	0
527743	99	20	0,3	cyclictest	659654	-21	irqcore	09:15:16	0
527753	99	19	17,2	cyclictest	736372	-21	kworker/u8:0+flush-259:0	10:30:24	3
527753	99	19	15,3	cyclictest	834623	-21	kworker/u8:2+flush-259:0	12:25:01	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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