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 Fri Nov 21, 2025 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
693961	99	37	22,9	cyclictest	771897	-21	/usr/sbin/munin	08:25:15	1
693966	99	35	30,3	cyclictest	704477	-21	kworker/u8:0+events_unbound	07:50:19	2
693966	99	32	26,5	cyclictest	761363	-21	latency_hist	08:15:00	2
693966	99	32	25,5	cyclictest	2698871	-21	systemd-journal	11:35:00	2
693961	99	32	28,3	cyclictest	838905	-21	kworker/u8:2+flush-259:0	09:40:24	1
693961	99	32	25,5	cyclictest	2698871	-21	systemd-journal	12:20:00	1
693961	99	32	25,4	cyclictest	912164	-21	latency_hist	10:40:00	1
693966	99	29	23,4	cyclictest	906579	-21	apt-get	10:35:01	2
693961	99	29	22,4	cyclictest	714574	-21	latency_hist	07:30:00	1
693966	99	28	25,2	cyclictest	927852	-21	kworker/u8:3+flush-259:0	10:55:20	2
693966	99	28	23,3	cyclictest	704477	-21	kworker/u8:0+events_unbound	08:05:14	2
693972	99	27	23,3	cyclictest	907231	-21	kworker/u8:1+flush-259:0	11:20:01	3
693966	99	26	21,4	cyclictest	854559	-21	kworker/u8:1+flush-259:0	10:00:20	2
693966	99	26	21,3	cyclictest	870215	-21	kworker/u8:0+flush-259:0	10:25:00	2
693966	99	26	21,3	cyclictest	704477	-21	kworker/u8:0+flush-259:0	07:30:15	2
693958	99	26	22,3	cyclictest	704477	-21	kworker/u8:0+events_unbound	08:05:00	0
693972	99	25	22,2	cyclictest	656182	-21	kworker/u8:2+flush-259:0	07:20:00	3
693972	99	25	20,3	cyclictest	963965	-21	/usr/sbin/munin	11:30:19	3
693972	99	25	19,5	cyclictest	2698871	-21	systemd-journal	11:10:20	3
693961	99	25	20,3	cyclictest	906797	-21	gpgv	10:35:01	1
693972	99	24	21,2	cyclictest	999592	-21	kworker/u8:3+events_unbound	12:25:01	3
693972	99	24	20,3	cyclictest	781487	-21	kworker/u8:0+flush-259:0	08:35:16	3
693966	99	24	20,3	cyclictest	943313	-21	kworker/u8:2+events_unbound	11:15:19	2
693966	99	24	20,3	cyclictest	771653	-21	kworker/u8:1+flush-259:0	08:50:24	2
693961	99	24	20,3	cyclictest	704477	-21	kworker/u8:0+flush-259:0	08:10:15	1
693972	99	23	20,2	cyclictest	755814	-21	kworker/u8:2+events_unbound	08:30:25	3
693972	99	23	19,3	cyclictest	704477	-21	kworker/u8:0+events_unbound	07:25:22	3
693966	99	23	19,3	cyclictest	802518	-21	kworker/u8:3+flush-259:0	09:00:19	2
693966	99	23	19,3	cyclictest	771653	-21	kworker/u8:1+flush-259:0	08:37:29	2
693961	99	23	18,3	cyclictest	802518	-21	kworker/u8:3+flush-259:0	09:20:16	1
693961	99	23	15,5	cyclictest	709432	-21	latency_hist	07:25:00	1
693961	99	23	14,8	cyclictest	714830	-21	apt-get	07:30:10	1
693972	99	22	18,3	cyclictest	870468	-21	kworker/u8:4+flush-259:0	10:25:24	3
693972	99	22	18,3	cyclictest	704477	-21	kworker/u8:0+flush-259:0	08:25:00	3
693966	99	22	19,2	cyclictest	745956	-21	kworker/u8:3+events_unbound	08:00:23	2
693966	99	22	18,3	cyclictest	844789	-21	kworker/u8:3+events_unbound	09:45:22	2
693966	99	22	18,3	cyclictest	755814	-21	kworker/u8:2+events_unbound	08:30:18	2
693961	99	22	16,4	cyclictest	761586	-21	kworker/u8:4+flush-259:0	08:20:18	1
693961	99	22	14,6	cyclictest	974027	-21	latency_hist	11:40:02	1
693972	99	21	19,1	cyclictest	870468	-21	kworker/u8:4+events_unbound	11:20:15	3
693972	99	21	17,3	cyclictest	927886	-21	apt-get	10:55:11	3
693972	99	21	17,3	cyclictest	870215	-21	kworker/u8:0+flush-259:0	10:40:00	3
693972	99	21	16,4	cyclictest	745471	-21	latency_hist	08:00:00	3
693966	99	21	17,3	cyclictest	838905	-21	kworker/u8:2+flush-259:0	09:40:25	2
693966	99	21	17,3	cyclictest	761586	-21	kworker/u8:4+events_unbound	08:45:15	2
693966	99	21	16,3	cyclictest	802842	-21	/usr/sbin/munin	08:55:16	2
693961	99	21	17,2	cyclictest	994892	-21	apt-get	12:00:13	1
693961	99	21	13,6	cyclictest	2698871	-21	systemd-journal	09:15:00	1
693958	99	21	18,2	cyclictest	854559	-21	kworker/u8:1+flush-259:0	10:00:23	0
693958	99	21	18,2	cyclictest	704477	-21	kworker/u8:0+events_unbound	07:30:20	0
693958	99	21	17,3	cyclictest	740570	-21	apt-get	07:55:11	0
693958	99	21	16,4	cyclictest	937944	-21	latency_hist	11:05:00	0
693958	99	21	15,4	cyclictest	963730	-21	latency_hist	11:30:01	0
693972	99	20	17,2	cyclictest	958027	-21	kworker/u8:3+flush-259:0	11:30:01	3
693972	99	20	17,2	cyclictest	885543	-21	kworker/u8:2+events_unbound	10:40:20	3
693972	99	20	17,2	cyclictest	870215	-21	kworker/u8:0+flush-259:0	10:55:00	3
693972	99	20	17,2	cyclictest	694128	-21	kworker/u8:1+events_unbound	07:20:17	3
693972	99	20	15,4	cyclictest	2698871	-21	systemd-journal	10:20:00	3
693966	99	20	17,2	cyclictest	999592	-21	kworker/u8:3+flush-259:0	12:39:51	2
693966	99	20	17,2	cyclictest	875629	-21	kworker/u8:5+flush-259:0	10:05:26	2
693966	99	20	16,3	cyclictest	844789	-21	kworker/u8:3+events_unbound	09:52:20	2
693966	99	20	16,3	cyclictest	823279	-21	kworker/u8:0+flush-259:0	09:25:23	2
693966	99	20	16,2	cyclictest	1005111	-21	kworker/u8:4+flush-259:0	12:15:20	2
693961	99	20	16,3	cyclictest	933020	-21	kworker/u8:0+flush-259:0	11:25:24	1
693961	99	20	14,5	cyclictest	704477	-21	kworker/u8:0+flush-259:0	08:05:13	1
693972	99	19	0,18	cyclictest	1	-21	systemd	09:15:01	3
693966	99	19	16,2	cyclictest	974045	-21	kworker/u8:1+flush-259:0	12:20:20	2
693966	99	19	16,2	cyclictest	802518	-21	kworker/u8:3+events_unbound	09:10:17	2
693966	99	19	16,2	cyclictest	761586	-21	kworker/u8:4+flush-259:0	08:25:19	2
693966	99	19	15,3	cyclictest	984558	-21	kworker/u8:2+events_unbound	11:50:16	2
693966	99	19	15,3	cyclictest	958027	-21	kworker/u8:3+flush-259:0	11:45:15	2
693966	99	19	15,3	cyclictest	870468	-21	kworker/u8:4+events_unbound	11:09:20	2
693966	99	19	15,3	cyclictest	870215	-21	kworker/u8:0+events_unbound	10:35:18	2
693966	99	19	11,6	cyclictest	2698871	-21	systemd-journal	10:15:00	2
693961	99	19	16,2	cyclictest	885934	-21	turbostat.cron	10:15:00	1
693961	99	19	13,4	cyclictest	933020	-21	kworker/u8:0+flush-259:0	11:55:14	1
693961	99	19	11,7	cyclictest	849410	-21	idleruntime-cro	09:39:59	1
693961	99	19	1,16	cyclictest	864839	-21	awk	09:54:59	1
693958	99	19	16,2	cyclictest	0	-21	swapper/0	12:15:00	0
693958	99	19	15,3	cyclictest	802518	-21	kworker/u8:3+events_unbound	09:10:19	0
693958	99	19	15,3	cyclictest	792542	-21	/usr/sbin/munin	08:45:20	0
693958	99	19	15,3	cyclictest	750630	-21	apt-get	08:05:02	0
693972	99	18	15,2	cyclictest	860382	-21	irqcore	09:50:17	3
693972	99	18	13,4	cyclictest	891378	-21	/usr/sbin/munin	10:20:15	3
693966	99	18	14,3	cyclictest	885543	-21	kworker/u8:2+events_unbound	10:15:15	2
693966	99	18	14,3	cyclictest	870215	-21	kworker/u8:0+events_unbound	10:54:19	2
693966	99	18	13,4	cyclictest	943346	-21	apt-get	11:10:11	2
693961	99	18	12,4	cyclictest	2698871	-21	systemd-journal	11:46:20	1
693961	99	18	10,6	cyclictest	869558	-21	ntpq	09:55:20	1
693958	99	18	14,3	cyclictest	933020	-21	kworker/u8:0+flush-259:0	11:35:01	0
693972	99	17	14,2	cyclictest	870468	-21	kworker/u8:4+flush-259:0	11:05:25	3
693972	99	17	14,2	cyclictest	704477	-21	kworker/u8:0+flush-259:0	08:10:00	3
693972	99	17	13,3	cyclictest	933020	-21	kworker/u8:0+events_unbound	11:55:00	3
693966	99	17	14,2	cyclictest	1005111	-21	kworker/u8:4+flush-259:0	12:25:20	2
693966	99	17	13,3	cyclictest	907231	-21	kworker/u8:1+flush-259:0	10:40:22	2
693966	99	17	13,3	cyclictest	838905	-21	kworker/u8:2+flush-259:0	09:55:23	2
693966	99	17	13,3	cyclictest	2831574	-21	kworker/u8:3+flush-259:0	07:45:00	2
693966	99	17	12,4	cyclictest	870468	-21	kworker/u8:4+flush-259:0	10:29:49	2
693961	99	17	4,12	cyclictest	1020431	-21	sed	12:25:00	1
693961	99	17	2,13	cyclictest	0	-21	swapper/1	10:00:18	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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