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 Wed Jul 22, 2026 12:44:05)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2428996	99	50	42,6	cyclictest	2559310	-21	latency_hist	09:15:01	0
2429001	99	41	37,3	cyclictest	2720062	-21	kworker/u8:4+flush-259:0	12:05:00	1
2428996	99	41	37,3	cyclictest	2756115	-21	kworker/u8:0+flush-259:0	12:35:20	0
2428996	99	40	35,3	cyclictest	2548257	-21	kworker/u8:4+events_unbound	09:25:00	0
2429006	99	38	32,4	cyclictest	2683238	-21	latency_hist	11:15:01	3
2428996	99	38	35,2	cyclictest	2512335	-21	kworker/u8:1+flush-259:0	08:50:01	0
2429003	99	37	33,3	cyclictest	2626144	-21	kworker/u8:2+flush-259:0	10:25:00	2
2428996	99	36	32,3	cyclictest	2600602	-21	kworker/u8:3+events_unbound	10:33:19	0
2429003	99	34	28,4	cyclictest	2725039	-21	latency_hist	11:55:00	2
2429001	99	34	29,3	cyclictest	2460760	-21	apt-get	07:40:13	1
2429001	99	33	28,3	cyclictest	335557	-21	systemd-journal	08:05:26	1
2429003	99	32	26,4	cyclictest	335557	-21	systemd-journal	12:00:00	2
2429006	99	31	25,4	cyclictest	509	-21	rs:main		3
2428996	99	31	28,2	cyclictest	2626144	-21	kworker/u8:2+flush-259:0	10:45:21	0
2428996	99	30	25,3	cyclictest	2590250	-21	kworker/u8:1+events_unbound	09:50:20	0
2428996	99	30	24,4	cyclictest	2677180	-21	ntpq	11:05:21	0
2429006	99	29	23,4	cyclictest	2683926	-21	apt-get	11:15:12	3
2429003	99	29	25,3	cyclictest	2574636	-21	kworker/u8:2+flush-259:0	09:40:16	2
2428996	99	29	26,2	cyclictest	2460725	-21	kworker/u8:1+events_unbound	07:50:23	0
2428996	99	29	26,2	cyclictest	2460725	-21	kworker/u8:1+events_unbound	07:50:23	0
2428996	99	29	25,3	cyclictest	2559544	-21	kworker/u8:0+events_unbound	09:15:13	0
2429006	99	28	21,5	cyclictest	2694026	-21	latency_hist	11:25:01	3
2429003	99	28	24,3	cyclictest	2413324	-21	kworker/u8:0+flush-259:0	07:24:59	2
2429001	99	28	24,3	cyclictest	335557	-21	systemd-journal	11:20:25	1
2428996	99	28	24,3	cyclictest	2657402	-21	kworker/u8:0+events_unbound	11:00:26	0
2428996	99	28	24,3	cyclictest	2512335	-21	kworker/u8:1+flush-259:0	08:50:21	0
2428996	99	28	24,2	cyclictest	2720062	-21	kworker/u8:4+events_unbound	12:00:20	0
2428996	99	28	23,4	cyclictest	335557	-21	systemd-journal	08:35:01	0
2429003	99	27	23,3	cyclictest	2662785	-21	kworker/u8:1+flush-259:0	11:40:16	2
2428996	99	27	24,2	cyclictest	2657402	-21	kworker/u8:0+events_unbound	10:50:17	0
2428996	99	27	24,2	cyclictest	2413324	-21	kworker/u8:0+events_unbound	07:25:20	0
2428996	99	27	23,3	cyclictest	2714920	-21	apt-get	11:45:12	0
2428996	99	27	21,5	cyclictest	2626406	-21	latency_hist	10:20:01	0
2428996	99	26	23,2	cyclictest	2481290	-21	kworker/u8:2+events_unbound	08:05:00	0
2428996	99	26	23,2	cyclictest	2449761	-21	kworker/u8:3+events_unbound	07:30:13	0
2428996	99	26	22,3	cyclictest	2418559	-21	kworker/u8:2+events_unbound	07:15:01	0
2429006	99	25	20,3	cyclictest	2548257	-21	kworker/u8:4+flush-259:0	09:25:00	3
2429001	99	25	22,2	cyclictest	2616334	-21	apt-get	10:10:10	1
2429001	99	25	21,3	cyclictest	2548257	-21	kworker/u8:4+flush-259:0	09:10:15	1
2429001	99	25	20,3	cyclictest	1607760	-21	fwupd	10:43:51	1
2428996	99	25	21,3	cyclictest	2720062	-21	kworker/u8:4+events_unbound	11:55:22	0
2428996	99	25	21,3	cyclictest	2559544	-21	kworker/u8:0+events_unbound	09:25:25	0
2429006	99	24	21,2	cyclictest	509	-21	rs:main		3
2429006	99	24	19,4	cyclictest	2512335	-21	kworker/u8:1+flush-259:0	08:53:27	3
2429006	99	23	19,3	cyclictest	2413324	-21	kworker/u8:0+flush-259:0	07:14:59	3
2429003	99	23	17,4	cyclictest	2766376	-21	latency_hist	12:35:00	2
2428996	99	23	20,2	cyclictest	2600602	-21	kworker/u8:3+events_unbound	10:00:23	0
2428996	99	23	20,2	cyclictest	2460725	-21	kworker/u8:1+flush-259:0	08:05:21	0
2428996	99	23	19,3	cyclictest	2418559	-21	kworker/u8:2+events_unbound	07:15:18	0
2428996	99	23	17,5	cyclictest	2687956	-21	ntpq	11:15:21	0
2429003	99	22	18,3	cyclictest	2730438	-21	kworker/u8:3+flush-259:0	12:25:00	2
2429003	99	22	18,3	cyclictest	2626144	-21	kworker/u8:2+flush-259:0	10:40:20	2
2428996	99	22	19,2	cyclictest	2662785	-21	kworker/u8:1+flush-259:0	11:40:15	0
2428996	99	22	19,2	cyclictest	2600602	-21	kworker/u8:3+events_unbound	10:25:13	0
2428996	99	22	19,2	cyclictest	2559544	-21	kworker/u8:0+events_unbound	09:35:19	0
2428996	99	22	19,2	cyclictest	2512335	-21	kworker/u8:1+events_unbound	09:05:15	0
2428996	99	22	19,2	cyclictest	2455361	-21	kworker/u8:2+flush-259:0	07:41:21	0
2429006	99	21	17,3	cyclictest	335557	-21	systemd-journal	12:15:00	3
2429006	99	21	17,3	cyclictest	2486711	-21	apt-get	08:05:13	3
2429006	99	21	1,18	cyclictest	2756102	-21	awk	12:25:00	3
2429003	99	21	16,4	cyclictest	335557	-21	systemd-journal	07:47:52	2
2429001	99	21	17,3	cyclictest	2673122	-21	/usr/sbin/munin	11:05:22	1
2429001	99	21	16,3	cyclictest	2756076	-21	cron	12:25:00	1
2428996	99	21	18,2	cyclictest	2689049	-21	kworker/u8:4+events_unbound	11:24:27	0
2428996	99	21	18,2	cyclictest	2522825	-21	kworker/u8:2+events_unbound	08:55:24	0
2428996	99	21	18,2	cyclictest	2413324	-21	kworker/u8:0+events_unbound	07:22:25	0
2428996	99	21	17,3	cyclictest	2626144	-21	kworker/u8:2+flush-259:0	10:23:25	0
2429006	99	20	9,9	cyclictest	509	-21	rs:main		3
2429001	99	20	17,2	cyclictest	2559544	-21	kworker/u8:0+flush-259:0	10:04:59	1
2429001	99	20	15,4	cyclictest	2683452	-21	store	11:15:01	1
2429001	99	20	15,4	cyclictest	2439626	-21	apt-get	07:20:10	1
2429001	99	20	12,6	cyclictest	335557	-21	systemd-journal	11:35:00	1
2428996	99	20	17,2	cyclictest	2522825	-21	kworker/u8:2+flush-259:0	09:00:13	0
2428996	99	20	17,2	cyclictest	2496373	-21	kworker/u8:0+events_unbound	08:25:24	0
2428996	99	20	16,3	cyclictest	2559544	-21	kworker/u8:0+events_unbound	10:08:27	0
2428996	99	20	16,3	cyclictest	2559544	-21	kworker/u8:0+events_unbound	10:08:27	0
2428996	99	20	14,4	cyclictest	2605787	-21	latency_hist	10:00:01	0
2428996	99	20	14,4	cyclictest	2579129	-21	ntpq	09:30:22	0
2428996	99	20	13,5	cyclictest	2760363	-21	ntpq	12:25:20	0
2429006	99	19	16,2	cyclictest	2413324	-21	kworker/u8:0+flush-259:0	07:25:16	3
2429006	99	19	15,2	cyclictest	0	-21	swapper/3	09:10:01	3
2429006	99	19	13,4	cyclictest	2616076	-21	latency_hist	10:10:01	3
2429006	99	19	13,4	cyclictest	2616076	-21	latency_hist	10:10:00	3
2429006	99	19	13,4	cyclictest	2554370	-21	apt-get	09:10:09	3
2429006	99	19	11,7	cyclictest	2465406	-21	kworker/u8:4+flush-259:0	08:25:01	3
2429003	99	19	16,2	cyclictest	2662785	-21	kworker/u8:1+flush-259:0	11:40:00	2
2429001	99	19	13,4	cyclictest	2745738	-21	latency_hist	12:15:00	1
2428996	99	19	16,2	cyclictest	2730438	-21	kworker/u8:3+events_unbound	12:30:16	0
2428996	99	19	16,2	cyclictest	2730226	-21	kworker/u8:1+events_unbound	12:10:18	0
2428996	99	19	16,2	cyclictest	2465406	-21	kworker/u8:4+events_unbound	08:24:25	0
2428996	99	19	16,2	cyclictest	2465406	-21	kworker/u8:4+events_unbound	08:15:03	0
2428996	99	19	12,5	cyclictest	2470058	-21	ntpq	07:45:22	0
2429006	99	18	8,9	cyclictest	0	-21	swapper/3	11:55:00	3
2429006	99	18	14,3	cyclictest	2657402	-21	kworker/u8:0+flush-259:0	10:59:26	3
2429006	99	18	14,3	cyclictest	2481290	-21	kworker/u8:2+flush-259:0	08:04:55	3
2429006	99	18	13,4	cyclictest	2720062	-21	kworker/u8:4+flush-259:0	12:35:01	3
2429006	99	18	0,8	cyclictest	2523380	-21	sed	08:40:15	3
2429003	99	18	16,1	cyclictest	0	-21	swapper/2	08:45:00	2
2429003	99	18	14,3	cyclictest	2657402	-21	kworker/u8:0+flush-259:0	10:50:25	2
2429001	99	18	15,2	cyclictest	2626144	-21	kworker/u8:2+flush-259:0	10:45:16	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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