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 Dec 05, 2025 12:44:04)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3545644	99	68	64,3	cyclictest	3571420	-21	kworker/u8:0+events_unbound	08:15:01	0
3545644	99	43	37,4	cyclictest	3753211	-21	apt-get	11:40:02	0
3545649	99	36	32,3	cyclictest	3779240	-21	kworker/u8:1+events_unbound	12:10:19	2
3545646	99	36	31,4	cyclictest	3674780	-21	kworker/u8:0+flush-259:0	10:55:17	1
3545646	99	35	31,3	cyclictest	3674780	-21	kworker/u8:0+flush-259:0	10:50:18	1
3545644	99	33	26,5	cyclictest	3634106	-21	latency_hist	09:45:01	0
3545644	99	32	27,4	cyclictest	3576542	-21	apt-get	08:15:00	0
3545654	99	31	25,4	cyclictest	3628080	-21	ntpq	09:35:19	3
3545649	99	31	27,3	cyclictest	3753420	-21	kworker/u8:2+flush-259:0	11:50:18	2
3545646	99	31	25,4	cyclictest	3584012	-21	apt-get	08:35:00	1
3545646	99	31	24,5	cyclictest	3558520	-21	latency_hist	07:40:00	1
3545644	99	31	27,3	cyclictest	3779560	-21	/usr/sbin/munin	12:05:16	0
3545644	99	31	27,3	cyclictest	3779240	-21	kworker/u8:1+events_unbound	12:05:01	0
3545644	99	31	25,4	cyclictest	2698871	-21	systemd-journal	10:00:00	0
3545649	99	30	26,3	cyclictest	3664726	-21	kworker/u8:2+flush-259:0	10:30:01	2
3545646	99	30	22,5	cyclictest	3815836	-21	latency_hist	12:40:00	1
3545644	99	30	26,3	cyclictest	3742980	-21	kworker/u8:1+flush-259:0	11:50:19	0
3545644	99	30	24,4	cyclictest	3800074	-21	base64	12:25:00	0
3545654	99	29	16,10	cyclictest	3680850	-21	latency_hist	10:30:00	3
3545649	99	29	23,4	cyclictest	3763902	-21	latency_hist	11:50:02	2
3545649	99	29	23,4	cyclictest	3576646	-21	cp	08:15:00	2
3545644	99	28	24,3	cyclictest	3674780	-21	kworker/u8:0+flush-259:0	11:05:01	0
3545654	99	27	20,5	cyclictest	3576546	-21	latency_hist	08:15:00	3
3545654	99	27	20,5	cyclictest	2698871	-21	systemd-journal	07:30:01	3
3545649	99	27	20,5	cyclictest	3603149	-21	latency_hist	09:15:01	2
3545646	99	27	23,3	cyclictest	3674780	-21	kworker/u8:0+flush-259:0	11:35:14	1
3545646	99	27	22,4	cyclictest	2698871	-21	systemd-journal	07:45:00	1
3545644	99	27	0,25	cyclictest	1	-21	systemd	09:05:00	0
3545654	99	26	18,5	cyclictest	3769040	-21	latency_hist	11:55:02	3
3545654	99	26	10,13	cyclictest	3759007	-21	/usr/sbin/munin	11:45:15	3
3545644	99	26	19,5	cyclictest	3679982	-21	ntpq	10:25:22	0
3545646	99	25	18,5	cyclictest	2698871	-21	systemd-journal	11:50:01	1
3545644	99	25	20,4	cyclictest	3577215	-21	kworker/u8:3+events_unbound	09:10:11	0
3545644	99	25	20,3	cyclictest	3674780	-21	kworker/u8:0+events_unbound	11:05:18	0
3545644	99	25	20,3	cyclictest	3550996	-21	kworker/u8:4+events_unbound	07:25:20	0
3545654	99	24	20,3	cyclictest	3571420	-21	kworker/u8:0+flush-259:0	08:25:16	3
3545654	99	24	18,4	cyclictest	3680873	-21	kworker/u8:3+flush-259:0	10:35:17	3
3545644	99	24	19,3	cyclictest	3590901	-21	kworker/u8:1+events_unbound	09:45:18	0
3545649	99	23	20,2	cyclictest	3550996	-21	kworker/u8:4+flush-259:0	07:55:00	2
3545649	99	22	18,3	cyclictest	3577215	-21	kworker/u8:3+events_unbound	09:25:19	2
3545649	99	22	17,3	cyclictest	3623816	-21	cron	09:35:00	2
3545646	99	22	17,3	cyclictest	3665625	-21	apt-get	10:15:10	1
3545646	99	22	15,5	cyclictest	3608304	-21	latency_hist	09:20:01	1
3545644	99	22	19,2	cyclictest	3571420	-21	kworker/u8:0+flush-259:0	08:25:24	0
3545644	99	22	18,3	cyclictest	3674780	-21	kworker/u8:0+events_unbound	10:55:21	0
3545644	99	22	17,4	cyclictest	3584012	-21	apt-get	08:35:02	0
3545649	99	21	18,2	cyclictest	3664726	-21	kworker/u8:2+flush-259:0	10:45:26	2
3545646	99	21	18,2	cyclictest	3570736	-21	sh	08:05:00	1
3545644	99	21	17,2	cyclictest	2698871	-21	systemd-journal	08:50:00	0
3545654	99	20	16,3	cyclictest	3696380	-21	gpgv	10:45:01	3
3545649	99	20	17,2	cyclictest	3753204	-21	cron	11:40:01	2
3545649	99	20	17,2	cyclictest	3644382	-21	kworker/u8:2+flush-259:0	09:55:20	2
3545649	99	20	17,2	cyclictest	0	-21	swapper/2	08:45:00	2
3545646	99	20	13,5	cyclictest	3732668	-21	latency_hist	11:20:00	1
3545644	99	20	17,2	cyclictest	3674780	-21	kworker/u8:0+flush-259:0	10:30:19	0
3545644	99	20	16,3	cyclictest	3701808	-21	kworker/u8:3+flush-259:0	11:25:16	0
3545644	99	20	16,3	cyclictest	3577215	-21	kworker/u8:3+events_unbound	09:30:15	0
3545644	99	20	14,4	cyclictest	3552293	-21	kworker/u8:2+flush-259:0	07:55:16	0
3545654	99	19	6,2	cyclictest	3795091	-21	cpuspeed_turbos	12:20:13	3
3545654	99	19	16,1	cyclictest	0	-21	swapper/3	09:59:59	3
3545654	99	19	12,5	cyclictest	3670546	-21	latency_hist	10:20:01	3
3545649	99	19	15,3	cyclictest	3727497	-21	kworker/u8:2+flush-259:0	11:20:25	2
3545646	99	19	13,4	cyclictest	3722594	-21	/usr/sbin/munin	11:10:13	1
3545646	99	19	13,4	cyclictest	3639269	-21	latency_hist	09:50:01	1
3545644	99	19	15,3	cyclictest	3805692	-21	kworker/u8:2+events_unbound	12:34:18	0
3545644	99	19	15,3	cyclictest	3759032	-21	apt-get	11:45:13	0
3545644	99	19	15,3	cyclictest	3628988	-21	kworker/u8:0+flush-259:0	10:00:27	0
3545644	99	19	15,3	cyclictest	3539020	-21	kworker/u8:1+flush-259:0	07:10:20	0
3545644	99	19	12,5	cyclictest	3727901	-21	diskstats	11:15:15	0
3545644	99	19	1,16	cyclictest	492	-21	dbus-daemon	07:44:59	0
3545644	99	19	0,17	cyclictest	1	-21	systemd	10:50:00	0
3545654	99	18	8,2	cyclictest	3779714	-21	cpuspeed_turbos	12:05:15	3
3545654	99	18	5,2	cyclictest	0	-21	swapper/3	08:55:01	3
3545654	99	18	4,3	cyclictest	2698871	-21	systemd-journal	10:10:00	3
3545654	99	18	15,2	cyclictest	3605706	-21	kthreadcore	09:15:16	3
3545654	99	18	14,2	cyclictest	0	-21	swapper/3	09:55:00	3
3545649	99	18	14,3	cyclictest	3753420	-21	kworker/u8:2+events_unbound	11:55:18	2
3545649	99	18	0,16	cyclictest	1	-21	systemd	10:55:28	2
3545646	99	18	15,2	cyclictest	3738474	-21	irqcore	11:25:16	1
3545646	99	18	15,2	cyclictest	3645645	-21	kthreadcore	09:55:18	1
3545644	99	18	15,2	cyclictest	0	-21	swapper/0	08:35:00	0
3545644	99	18	14,3	cyclictest	3779240	-21	kworker/u8:1+events_unbound	12:10:18	0
3545644	99	18	14,2	cyclictest	3664726	-21	kworker/u8:2+events_unbound	10:40:22	0
3545654	99	17	7,8	cyclictest	0	-21	swapper/3	12:35:09	3
3545654	99	17	11,5	cyclictest	3578251	-21	idleruntime-cro	08:25:00	3
3545654	99	17	11,4	cyclictest	3742079	-21	ntpq	11:25:22	3
3545649	99	17	14,2	cyclictest	3794509	-21	kworker/u8:4+flush-259:0	12:30:27	2
3545649	99	17	13,3	cyclictest	3742980	-21	kworker/u8:1+flush-259:0	11:40:20	2
3545649	99	17	13,3	cyclictest	3664726	-21	kworker/u8:2+flush-259:0	10:20:16	2
3545649	99	17	12,4	cyclictest	3686253	-21	apt-get	10:35:12	2
3545649	99	17	11,4	cyclictest	2698871	-21	systemd-journal	11:20:00	2
3545646	99	17	10,5	cyclictest	2698871	-21	systemd-journal	09:15:00	1
3545644	99	17	14,2	cyclictest	606	50	irq/133-enp0s29f1:rx-0	10:16:14	0
3545644	99	17	14,2	cyclictest	3577215	-21	kworker/u8:3+events_unbound	08:40:15	0
3545644	99	17	13,3	cyclictest	3577215	-21	kworker/u8:3+events_unbound	09:25:25	0
3545644	99	17	13,3	cyclictest	3525801	-21	kworker/u8:0+flush-259:0	07:50:00	0
3545644	99	17	10,6	cyclictest	2698871	-21	systemd-journal	12:19:14	0
3545654	99	16	13,2	cyclictest	3621201	-21	kthreadcore	09:30:19	3
3545654	99	16	13,2	cyclictest	0	-21	swapper/3	09:50:00	3
3545649	99	16	13,2	cyclictest	3577215	-21	kworker/u8:3+flush-259:0	09:15:16	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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