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 Sun Jul 05, 2026 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3046584	99	49	46,2	cyclictest	3082434	-21	kworker/u8:0+events_unbound	20:45:23	3
3046580	99	48	41,5	cyclictest	3348390	-21	latency_hist	00:00:02	2
3046580	99	48	39,6	cyclictest	3093289	-21	cat	19:55:00	2
3046584	99	47	41,3	cyclictest	3203574	-21	kworker/u8:2+events_unbound	22:00:16	3
3046577	99	46	38,5	cyclictest	3244736	-21	latency_hist	22:20:00	1
3046584	99	43	40,2	cyclictest	3244773	-21	kworker/u8:0+events_unbound	22:25:15	3
3046584	99	41	38,2	cyclictest	3192882	-21	kworker/u8:1+events_unbound	23:00:15	3
3046584	99	41	38,2	cyclictest	3146185	-21	kworker/u8:2+events_unbound	20:50:22	3
3046584	99	40	31,2	cyclictest	3093168	-21	kworker/u8:4+events_unbound	20:10:23	3
3046584	99	40	31,2	cyclictest	3093168	-21	kworker/u8:4+events_unbound	20:10:22	3
3046577	99	39	32,5	cyclictest	3343204	-21	latency_hist	23:55:01	1
3046572	99	39	36,2	cyclictest	3082434	-21	kworker/u8:0+flush-259:0	21:30:21	0
3046572	99	39	35,3	cyclictest	2987377	-21	kworker/u8:1+flush-259:0	19:35:16	0
3046572	99	39	33,4	cyclictest	3388897	-21	ntpq	00:35:22	0
3046584	99	38	35,2	cyclictest	3156274	-21	kworker/u8:1+events_unbound	20:55:22	3
3046584	99	38	35,2	cyclictest	3051906	-21	kworker/u8:3+flush-259:0	19:40:24	3
3046580	99	38	34,3	cyclictest	3082434	-21	kworker/u8:0+flush-259:0	20:25:16	2
3046577	99	38	26,10	cyclictest	3233535	-21	ntpq	22:05:20	1
3046577	99	38	25,11	cyclictest	3214095	-21	/usr/sbin/munin	21:50:13	1
3046584	99	37	34,2	cyclictest	3343226	-21	kworker/u8:3+flush-259:0	00:15:13	3
3046584	99	37	34,2	cyclictest	3332645	-21	kworker/u8:0+events_unbound	00:10:21	3
3046584	99	37	34,2	cyclictest	3322806	-21	kworker/u8:4+flush-259:0	23:40:24	3
3046584	99	37	33,3	cyclictest	3192882	-21	kworker/u8:1+events_unbound	22:20:16	3
3046584	99	37	33,3	cyclictest	3087983	-21	kworker/u8:3+events_unbound	19:55:22	3
3046580	99	37	33,3	cyclictest	3265332	-21	kworker/u8:4+flush-259:0	23:15:00	2
3046572	99	37	33,3	cyclictest	3082434	-21	kworker/u8:0+events_unbound	20:35:23	0
3046584	99	36	33,2	cyclictest	3146185	-21	kworker/u8:2+events_unbound	21:05:15	3
3046584	99	36	33,2	cyclictest	2987377	-21	kworker/u8:1+events_unbound	19:30:24	3
3046572	99	36	30,5	cyclictest	3358722	-21	latency_hist	00:10:02	0
3046584	99	35	33,2	cyclictest	3082434	-21	kworker/u8:0+events_unbound	21:15:17	3
3046584	99	35	32,2	cyclictest	3093168	-21	kworker/u8:4+flush-259:0	20:15:24	3
3046577	99	35	28,4	cyclictest	3213860	-21	latency_hist	21:50:01	1
3046577	99	35	27,5	cyclictest	3192997	-21	cat	21:30:01	1
3046584	99	34	31,2	cyclictest	3082434	-21	kworker/u8:0+flush-259:0	19:45:24	3
3046584	99	34	28,2	cyclictest	3332645	-21	kworker/u8:0+events_unbound	00:38:08	3
3046584	99	34	27,2	cyclictest	3203574	-21	kworker/u8:2+events_unbound	21:40:27	3
3046580	99	34	27,5	cyclictest	3071595	-21	ntpq	19:30:21	2
3046584	99	33	30,2	cyclictest	3322806	-21	kworker/u8:4+events_unbound	23:35:26	3
3046584	99	33	30,2	cyclictest	3192882	-21	kworker/u8:1+events_unbound	22:10:24	3
3046584	99	33	29,3	cyclictest	3013522	-21	kworker/u8:2+events_unbound	19:23:44	3
3046572	99	33	29,3	cyclictest	3051906	-21	kworker/u8:3+flush-259:0	19:25:15	0
3046572	99	33	28,4	cyclictest	3243889	-21	ntpq	22:15:22	0
3046584	99	32	29,2	cyclictest	3082434	-21	kworker/u8:0+flush-259:0	21:30:26	3
3046584	99	32	29,2	cyclictest	3082434	-21	kworker/u8:0+flush-259:0	20:35:18	3
3046580	99	32	29,2	cyclictest	3343226	-21	kworker/u8:3+flush-259:0	00:05:21	2
3046580	99	32	29,2	cyclictest	3203574	-21	kworker/u8:2+flush-259:0	22:15:24	2
3046580	99	32	25,5	cyclictest	3120587	-21	diskstats	20:20:14	2
3046572	99	32	28,2	cyclictest	3338269	-21	kworker/u8:1+flush-259:0	00:05:00	0
3046584	99	31	28,2	cyclictest	3082434	-21	kworker/u8:0+flush-259:0	20:42:15	3
3046580	99	31	27,3	cyclictest	3093168	-21	kworker/u8:4+flush-259:0	20:05:00	2
3046577	99	31	24,4	cyclictest	3057302	-21	/usr/sbin/munin	19:20:15	1
3046572	99	31	28,2	cyclictest	3296429	-21	kworker/u8:2+flush-259:0	23:50:22	0
3046572	99	31	28,2	cyclictest	3260221	-21	kworker/u8:2+events_unbound	22:45:00	0
3046584	99	30	27,2	cyclictest	3306429	-21	kworker/u8:1+events_unbound	23:18:45	3
3046584	99	30	26,3	cyclictest	3275698	-21	kworker/u8:0+flush-259:0	23:25:16	3
3046584	99	30	26,3	cyclictest	3275698	-21	kworker/u8:0+events_unbound	23:07:48	3
3046572	99	30	27,2	cyclictest	3244773	-21	kworker/u8:0+flush-259:0	22:25:15	0
3046572	99	30	24,5	cyclictest	335557	-21	systemd-journal	22:35:45	0
3046584	99	29	26,2	cyclictest	3332645	-21	kworker/u8:0+events_unbound	00:23:07	3
3046584	99	29	26,2	cyclictest	3082434	-21	kworker/u8:0+flush-259:0	21:35:19	3
3046584	99	29	26,2	cyclictest	3051906	-21	kworker/u8:3+events_unbound	19:29:45	3
3046584	99	29	26,2	cyclictest	2987377	-21	kworker/u8:1+events_unbound	19:35:20	3
3046584	99	29	25,3	cyclictest	3260221	-21	kworker/u8:2+events_unbound	22:47:45	3
3046584	99	29	25,3	cyclictest	3260221	-21	kworker/u8:2+events_unbound	22:47:45	3
3046584	99	29	25,3	cyclictest	3120182	-21	kworker/u8:1+events_unbound	20:20:21	3
3046580	99	29	26,2	cyclictest	3275698	-21	kworker/u8:0+events_unbound	23:00:19	2
3046580	99	29	25,3	cyclictest	3306429	-21	kworker/u8:1+flush-259:0	23:40:00	2
3046572	99	29	24,4	cyclictest	3046308	-21	latency_hist	19:10:01	0
3046572	99	29	22,5	cyclictest	335557	-21	systemd-journal	21:47:44	0
3046584	99	28	26,2	cyclictest	3296429	-21	kworker/u8:2+events_unbound	23:55:19	3
3046584	99	28	26,2	cyclictest	3265332	-21	kworker/u8:4+events_unbound	23:10:10	3
3046584	99	28	25,2	cyclictest	3343226	-21	kworker/u8:3+events_unbound	00:28:08	3
3046584	99	28	25,2	cyclictest	3322806	-21	kworker/u8:4+events_unbound	23:48:45	3
3046584	99	28	25,2	cyclictest	3082434	-21	kworker/u8:0+events_unbound	20:25:20	3
3046584	99	28	25,2	cyclictest	3082434	-21	kworker/u8:0+events_unbound	20:00:23	3
3046584	99	28	25,2	cyclictest	3013522	-21	kworker/u8:2+flush-259:0	19:10:18	3
3046577	99	28	21,5	cyclictest	3166576	-21	latency_hist	21:05:01	1
3046572	99	28	24,3	cyclictest	3275698	-21	kworker/u8:0+events_unbound	23:06:44	0
3046584	99	27	24,2	cyclictest	3203574	-21	kworker/u8:2+events_unbound	21:55:12	3
3046584	99	27	22,2	cyclictest	3296429	-21	kworker/u8:2+events_unbound	00:00:17	3
3046584	99	27	21,4	cyclictest	3322337	-21	cat	23:35:01	3
3046584	99	27	21,2	cyclictest	3093168	-21	kworker/u8:4+events_unbound	20:05:22	3
3046580	99	27	24,2	cyclictest	3051906	-21	kworker/u8:3+flush-259:0	19:40:25	2
3046580	99	27	20,5	cyclictest	335557	-21	systemd-journal	00:25:00	2
3046577	99	27	21,4	cyclictest	3291482	-21	/usr/sbin/munin	23:05:25	1
3046572	99	27	24,2	cyclictest	3192882	-21	kworker/u8:1+flush-259:0	22:20:21	0
3046584	99	26	23,2	cyclictest	3192882	-21	kworker/u8:1+events_unbound	22:40:22	3
3046584	99	26	23,2	cyclictest	3087983	-21	kworker/u8:3+events_unbound	21:10:15	3
3046584	99	26	22,3	cyclictest	3087983	-21	kworker/u8:3+events_unbound	20:32:13	3
3046580	99	26	19,5	cyclictest	335557	-21	systemd-journal	21:14:44	2
3046572	99	26	22,3	cyclictest	3333184	-21	apt-get	23:45:11	0
3046572	99	26	22,3	cyclictest	3306429	-21	kworker/u8:1+events_unbound	23:17:46	0
3046572	99	26	22,3	cyclictest	3156274	-21	kworker/u8:1+events_unbound	20:55:20	0
3046572	99	26	22,3	cyclictest	3087983	-21	kworker/u8:3+flush-259:0	20:10:15	0
3046572	99	26	22,3	cyclictest	3087983	-21	kworker/u8:3+flush-259:0	20:10:15	0
3046572	99	26	22,3	cyclictest	3051906	-21	kworker/u8:3+flush-259:0	19:40:20	0
3046584	99	25	22,2	cyclictest	2987377	-21	kworker/u8:1+events_unbound	19:50:25	3
3046584	99	25	21,3	cyclictest	3244773	-21	kworker/u8:0+events_unbound	22:37:41	3
3046580	99	25	22,2	cyclictest	3087983	-21	kworker/u8:3+events_unbound	20:40:23	2
3046572	99	25	21,3	cyclictest	3203574	-21	kworker/u8:2+flush-259:0	21:45:00	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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