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 Aug 02, 2026 12:44:07)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4106934	99	46	42,3	cyclictest	58204	-21	kworker/u8:4+flush-259:0	09:55:00	3
4106934	99	42	38,3	cyclictest	4142956	-21	kworker/u8:2+events_unbound	08:18:33	3
4106934	99	42	38,3	cyclictest	219724	-21	kworker/u8:0+flush-259:0	12:30:26	3
4106934	99	42	38,3	cyclictest	219724	-21	kworker/u8:0+flush-259:0	12:30:25	3
4106924	99	42	36,4	cyclictest	335557	-21	systemd-journal	09:58:34	0
4106934	99	40	37,2	cyclictest	4168913	-21	kworker/u8:0+events_unbound	08:55:23	3
4106934	99	40	37,2	cyclictest	4142956	-21	kworker/u8:2+events_unbound	08:35:26	3
4106928	99	40	37,2	cyclictest	4168913	-21	kworker/u8:0+flush-259:0	09:10:01	1
4106934	99	39	36,2	cyclictest	173297	-21	kworker/u8:3+flush-259:0	11:39:36	3
4106934	99	37	34,2	cyclictest	4091225	-21	kworker/u8:2+events_unbound	07:25:00	3
4106934	99	37	33,3	cyclictest	84028	-21	kworker/u8:2+events_unbound	10:12:36	3
4106924	99	37	31,5	cyclictest	214450	-21	gpgv	12:00:00	0
4106932	99	36	30,4	cyclictest	4143089	-21	latency_hist	07:45:01	2
4106928	99	36	31,3	cyclictest	4168913	-21	kworker/u8:0+flush-259:0	08:20:18	1
4106924	99	36	29,5	cyclictest	173330	-21	apt-get	11:20:11	0
4106934	99	35	32,2	cyclictest	53025	-21	kworker/u8:1+flush-259:0	10:15:25	3
4106934	99	35	30,4	cyclictest	199096	-21	kworker/u8:1+events_unbound	11:57:35	3
4106928	99	35	28,5	cyclictest	335557	-21	systemd-journal	12:28:35	1
4106934	99	34	31,2	cyclictest	94205	-21	kworker/u8:0+events_unbound	10:20:25	3
4106934	99	34	31,2	cyclictest	94205	-21	kworker/u8:0+events_unbound	10:20:25	3
4106934	99	34	31,2	cyclictest	4091225	-21	kworker/u8:2+events_unbound	07:16:34	3
4106934	99	34	30,3	cyclictest	84028	-21	kworker/u8:2+events_unbound	10:39:04	3
4106934	99	34	30,3	cyclictest	4137658	-21	kworker/u8:3+events_unbound	08:09:35	3
4106934	99	34	30,3	cyclictest	219724	-21	kworker/u8:0+events_unbound	12:14:13	3
4106934	99	34	28,4	cyclictest	4174069	-21	latency_hist	08:15:01	3
4106934	99	34	27,2	cyclictest	4137658	-21	kworker/u8:3+events_unbound	07:50:23	3
4106928	99	34	28,4	cyclictest	203227	-21	ntpq	11:45:23	1
4106934	99	33	29,3	cyclictest	4142956	-21	kworker/u8:2+events_unbound	08:04:35	3
4106934	99	33	28,4	cyclictest	4168913	-21	kworker/u8:0+events_unbound	08:21:35	3
4106934	99	32	29,2	cyclictest	68511	-21	kworker/u8:0+events_unbound	09:44:34	3
4106934	99	32	28,3	cyclictest	53025	-21	kworker/u8:1+events_unbound	10:28:36	3
4106934	99	32	28,3	cyclictest	53025	-21	kworker/u8:1+events_unbound	10:28:35	3
4106934	99	32	28,3	cyclictest	32304	-21	kworker/u8:3+events_unbound	09:35:24	3
4106924	99	32	25,5	cyclictest	142062	-21	diskstats	10:50:15	0
4106934	99	31	27,3	cyclictest	199096	-21	kworker/u8:1+events_unbound	11:49:34	3
4106934	99	31	25,4	cyclictest	11166	-21	latency_hist	08:45:01	3
4106932	99	31	25,4	cyclictest	95188	-21	diskstats	10:05:13	2
4106928	99	31	27,3	cyclictest	4137658	-21	kworker/u8:3+flush-259:0	08:43:38	1
4106924	99	31	25,4	cyclictest	94334	-21	latency_hist	10:05:00	0
4106934	99	30	27,2	cyclictest	84028	-21	kworker/u8:2+flush-259:0	11:10:25	3
4106934	99	30	27,2	cyclictest	84028	-21	kworker/u8:2+events_unbound	10:40:23	3
4106934	99	30	26,3	cyclictest	84028	-21	kworker/u8:2+events_unbound	10:32:35	3
4106928	99	30	25,3	cyclictest	214942	-21	base64	12:00:01	1
4106934	99	29	26,2	cyclictest	53025	-21	kworker/u8:1+events_unbound	09:55:21	3
4106934	99	29	25,3	cyclictest	53025	-21	kworker/u8:1+events_unbound	10:03:35	3
4106934	99	29	25,3	cyclictest	4142956	-21	kworker/u8:2+events_unbound	07:48:31	3
4106934	99	29	25,3	cyclictest	4091225	-21	kworker/u8:2+events_unbound	07:13:42	3
4106934	99	29	25,3	cyclictest	32304	-21	kworker/u8:3+events_unbound	09:20:25	3
4106928	99	29	24,4	cyclictest	219724	-21	kworker/u8:0+flush-259:0	12:10:00	1
4106928	99	29	24,3	cyclictest	225421	-21	/usr/sbin/munin	12:10:16	1
4106928	99	29	23,4	cyclictest	4117505	-21	apt-get	07:20:13	1
4106934	99	28	25,2	cyclictest	58204	-21	kworker/u8:4+events_unbound	09:33:35	3
4106934	99	28	25,2	cyclictest	42874	-21	kworker/u8:2+events_unbound	09:15:20	3
4106934	99	28	25,2	cyclictest	4063532	-21	kworker/u8:0+events_unbound	07:35:20	3
4106934	99	28	20,6	cyclictest	157231	-21	cp	11:05:00	3
4106928	99	28	24,3	cyclictest	4137658	-21	kworker/u8:3+flush-259:0	08:00:29	1
4106928	99	28	24,3	cyclictest	209533	-21	apt-get	11:55:12	1
4106934	99	27	24,2	cyclictest	4168913	-21	kworker/u8:0+events_unbound	08:30:22	3
4106934	99	27	24,2	cyclictest	4137658	-21	kworker/u8:3+events_unbound	07:58:32	3
4106932	99	27	24,2	cyclictest	173297	-21	kworker/u8:3+flush-259:0	12:35:01	2
4106932	99	27	24,2	cyclictest	173297	-21	kworker/u8:3+flush-259:0	12:35:00	2
4106928	99	27	23,3	cyclictest	4137658	-21	kworker/u8:3+flush-259:0	08:05:30	1
4106928	99	27	21,4	cyclictest	4158582	-21	latency_hist	08:00:01	1
4106924	99	27	14,11	cyclictest	157477	-21	latency_hist	11:05:02	0
4106934	99	26	23,2	cyclictest	53025	-21	kworker/u8:1+events_unbound	09:45:19	3
4106934	99	26	22,3	cyclictest	199096	-21	kworker/u8:1+events_unbound	12:00:15	3
4106932	99	26	22,3	cyclictest	53025	-21	kworker/u8:1+flush-259:0	10:00:00	2
4106932	99	26	22,3	cyclictest	53025	-21	kworker/u8:1+events_unbound	10:27:35	2
4106932	99	26	22,3	cyclictest	53025	-21	kworker/u8:1+events_unbound	10:27:35	2
4106928	99	26	19,5	cyclictest	4152598	-21	ntpq	07:50:24	1
4106928	99	26	19,5	cyclictest	335557	-21	systemd-journal	10:15:00	1
4106928	99	26	18,6	cyclictest	335557	-21	systemd-journal	07:45:00	1
4106934	99	25	22,2	cyclictest	219724	-21	kworker/u8:0+events_unbound	12:05:22	3
4106934	99	25	22,2	cyclictest	173297	-21	kworker/u8:3+events_unbound	11:25:20	3
4106934	99	25	21,3	cyclictest	240933	-21	/usr/sbin/munin	12:25:24	3
4106932	99	25	21,3	cyclictest	4137658	-21	kworker/u8:3+events_unbound	07:55:00	2
4106932	99	25	21,3	cyclictest	4137658	-21	kworker/u8:3+events_unbound	07:47:35	2
4106928	99	25	20,4	cyclictest	168147	-21	/usr/sbin/munin	11:15:16	1
4106924	99	25	19,4	cyclictest	94973	-21	cp	10:05:01	0
4106924	99	25	1,22	cyclictest	1	-21	systemd	10:36:34	0
4106934	99	24	21,2	cyclictest	4127617	-21	kworker/u8:1+events_unbound	07:40:11	3
4106934	99	24	20,3	cyclictest	11191	-21	kworker/u8:1+events_unbound	08:49:33	3
4106932	99	24	21,2	cyclictest	11191	-21	kworker/u8:1+flush-259:0	09:00:25	2
4106932	99	24	20,3	cyclictest	219724	-21	kworker/u8:0+flush-259:0	12:05:34	2
4106932	99	24	20,3	cyclictest	162771	-21	kworker/u8:0+events_unbound	11:43:35	2
4106928	99	24	19,4	cyclictest	162995	-21	apt-get	11:10:12	1
4106928	99	24	18,4	cyclictest	4142956	-21	kworker/u8:2+flush-259:0	08:25:17	1
4106928	99	24	18,4	cyclictest	335557	-21	systemd-journal	09:00:34	1
4106928	99	24	18,4	cyclictest	335557	-21	systemd-journal	08:58:34	1
4106924	99	24	18,4	cyclictest	4158845	-21	apt-get	08:00:14	0
4106924	99	24	18,4	cyclictest	335557	-21	systemd-journal	08:39:33	0
4106924	99	24	0,23	cyclictest	1	-21	systemd	09:15:01	0
4106934	99	23	20,2	cyclictest	94205	-21	kworker/u8:0+events_unbound	10:05:18	3
4106934	99	23	20,2	cyclictest	173297	-21	kworker/u8:3+events_unbound	12:38:35	3
4106934	99	23	19,3	cyclictest	53025	-21	kworker/u8:1+events_unbound	10:45:13	3
4106932	99	23	19,3	cyclictest	4168913	-21	kworker/u8:0+events_unbound	08:20:35	2
4106932	99	23	19,3	cyclictest	4091225	-21	kworker/u8:2+events_unbound	07:21:34	2
4106932	99	23	19,3	cyclictest	199096	-21	kworker/u8:1+events_unbound	11:54:34	2
4106932	99	23	19,2	cyclictest	68511	-21	kworker/u8:0+flush-259:0	09:40:17	2
4106932	99	23	18,3	cyclictest	4168913	-21	kworker/u8:0+events_unbound	08:50:19	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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