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
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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 Dec 21, 2025 00:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
4044911	99	46	42,3	cyclictest	4091774	-21	kworker/u8:4+events_unbound	20:35:01	0
4044911	99	42	36,4	cyclictest	4164175	-21	kworker/u8:0+events_unbound	21:20:17	0
4044914	99	39	32,4	cyclictest	4091759	-21	latency_hist	19:55:01	1
4044911	99	39	32,2	cyclictest	4184042	-21	kworker/u8:4+events_unbound	21:40:14	0
4044914	99	38	32,4	cyclictest	64161	-21	latency_hist	22:35:01	1
4044911	99	38	35,2	cyclictest	4006506	-21	kworker/u8:2+flush-259:0	19:50:00	0
4044911	99	38	35,2	cyclictest	178979	-21	kworker/u8:0+events_unbound	00:25:24	0
4044911	99	38	35,2	cyclictest	110905	-21	kworker/u8:4+flush-259:0	23:25:24	0
4044911	99	38	32,4	cyclictest	4133343	-21	apt-get	20:35:14	0
4044914	99	37	33,3	cyclictest	4055294	-21	gpgv	19:20:00	1
4044911	99	37	34,2	cyclictest	4055832	-21	kworker/u8:0+events_unbound	19:25:22	0
4044911	99	37	34,2	cyclictest	116875	-21	kworker/u8:1+events_unbound	00:30:23	0
4044911	99	37	1,34	cyclictest	32864	-21	munin-run	22:05:00	0
4044911	99	36	32,3	cyclictest	152745	-21	kworker/u8:2+events_unbound	00:20:23	0
4044922	99	35	32,2	cyclictest	4096934	-21	kworker/u8:5+flush-259:0	20:15:19	3
4044914	99	35	30,4	cyclictest	116887	-21	/usr/sbin/munin	23:25:15	1
4044911	99	34	30,3	cyclictest	4164175	-21	kworker/u8:0+flush-259:0	21:15:27	0
4044922	99	33	27,4	cyclictest	64345	-21	cp	22:35:01	3
4044917	99	33	30,2	cyclictest	4189795	-21	kworker/u8:1+flush-259:0	21:30:25	2
4044911	99	33	30,2	cyclictest	4065972	-21	kworker/u8:3+flush-259:0	20:20:25	0
4044911	99	33	28,3	cyclictest	127011	-21	kworker/u8:5+flush-259:0	23:50:23	0
4044922	99	32	29,2	cyclictest	4184042	-21	kworker/u8:4+flush-259:0	21:45:16	3
4044917	99	32	29,2	cyclictest	4189795	-21	kworker/u8:1+flush-259:0	21:40:18	2
4044914	99	32	25,5	cyclictest	167507	-21	ntpq	00:10:21	1
4044911	99	32	29,2	cyclictest	4039952	-21	kworker/u8:3+events_unbound	19:15:19	0
4044911	99	32	28,3	cyclictest	64086	-21	kworker/u8:1+events_unbound	22:40:23	0
4044922	99	31	24,5	cyclictest	193439	-21	ntpq	00:35:21	3
4044917	99	31	27,3	cyclictest	158473	-21	kworker/u8:4+flush-259:0	00:10:18	2
4044922	99	30	24,4	cyclictest	27891	-21	/usr/sbin/munin	22:00:14	3
4044914	99	30	24,4	cyclictest	43775	-21	/usr/sbin/munin	22:15:23	1
4044914	99	30	23,5	cyclictest	90411	-21	latency_hist	23:00:01	1
4044911	99	30	26,3	cyclictest	4164175	-21	kworker/u8:0+events_unbound	21:15:00	0
4044911	99	30	23,5	cyclictest	38401	-21	latency_hist	22:10:01	0
4044922	99	29	24,3	cyclictest	252	-21	systemd-journal	21:55:00	3
4044922	99	29	24,3	cyclictest	252	-21	systemd-journal	21:54:59	3
4044922	99	29	23,4	cyclictest	4071379	-21	/usr/sbin/munin	19:35:17	3
4044922	99	29	23,4	cyclictest	4071379	-21	/usr/sbin/munin	19:35:16	3
4044917	99	29	25,3	cyclictest	4153833	-21	kworker/u8:1+flush-259:0	21:05:01	2
4044911	99	29	26,2	cyclictest	90050	-21	kworker/u8:1+events_unbound	23:00:18	0
4044911	99	29	26,2	cyclictest	53538	-21	kworker/u8:4+flush-259:0	22:55:21	0
4044911	99	29	26,2	cyclictest	4127932	-21	kworker/u8:0+events_unbound	20:45:24	0
4044911	99	29	24,3	cyclictest	4189795	-21	kworker/u8:1+flush-259:0	21:30:18	0
4044922	99	28	22,4	cyclictest	172668	-21	ntpq	00:15:20	3
4044911	99	28	25,2	cyclictest	4184042	-21	kworker/u8:4+flush-259:0	21:45:20	0
4044911	99	28	25,2	cyclictest	116875	-21	kworker/u8:1+flush-259:0	23:55:23	0
4044911	99	28	24,3	cyclictest	110905	-21	kworker/u8:4+flush-259:0	23:35:28	0
4044911	99	27	24,2	cyclictest	4117844	-21	kworker/u8:1+events_unbound	20:40:14	0
4044911	99	27	24,2	cyclictest	1412	-21	kworker/u8:0+flush-259:0	21:50:26	0
4044911	99	27	24,2	cyclictest	1412	-21	kworker/u8:0+flush-259:0	21:50:26	0
4044922	99	26	23,2	cyclictest	4055832	-21	kworker/u8:0+flush-259:0	20:00:15	3
4044917	99	26	20,4	cyclictest	163214	-21	latency_hist	00:10:00	2
4044914	99	26	20,4	cyclictest	132466	-21	apt-get	23:40:12	1
4044914	99	26	20,4	cyclictest	104971	-21	ntpq	23:10:20	1
4044911	99	26	22,3	cyclictest	4148481	-21	kworker/u8:3+flush-259:0	21:00:22	0
4044911	99	26	22,3	cyclictest	11250	-21	kworker/u8:3+events_unbound	22:25:25	0
4044911	99	26	22,3	cyclictest	11250	-21	kworker/u8:3+events_unbound	22:10:14	0
4044922	99	25	22,2	cyclictest	116875	-21	kworker/u8:1+flush-259:0	23:35:20	3
4044922	99	25	17,4	cyclictest	252	-21	systemd-journal	00:10:01	3
4044922	99	25	17,4	cyclictest	252	-21	systemd-journal	00:10:00	3
4044917	99	25	22,2	cyclictest	32424	-21	kworker/u8:2+flush-259:0	22:05:02	2
4044917	99	25	19,5	cyclictest	178693	-21	apt-get	00:24:55	2
4044911	99	25	22,2	cyclictest	4006506	-21	kworker/u8:2+flush-259:0	19:55:18	0
4044911	99	25	21,3	cyclictest	48438	-21	kworker/u8:2+flush-259:0	22:20:26	0
4044911	99	25	21,3	cyclictest	48438	-21	kworker/u8:2+events_unbound	23:30:18	0
4044911	99	25	21,3	cyclictest	4143128	-21	kworker/u8:2+events_unbound	21:25:01	0
4044917	99	24	21,2	cyclictest	75133	-21	kworker/u8:0+flush-259:0	23:05:26	2
4044917	99	24	21,2	cyclictest	153102	-21	kworker/u8:3+flush-259:0	00:05:00	2
4044917	99	24	20,3	cyclictest	4091774	-21	kworker/u8:4+flush-259:0	20:15:15	2
4044914	99	24	19,3	cyclictest	4117844	-21	kworker/u8:1+flush-259:0	20:45:18	1
4044914	99	24	18,4	cyclictest	4102575	-21	diskstats	20:05:15	1
4044911	99	24	21,2	cyclictest	4065972	-21	kworker/u8:3+flush-259:0	19:30:22	0
4044922	99	23	20,2	cyclictest	11250	-21	kworker/u8:3+flush-259:0	22:10:24	3
4044922	99	23	17,4	cyclictest	252	-21	systemd-journal	00:32:53	3
4044917	99	23	19,3	cyclictest	4164175	-21	kworker/u8:0+flush-259:0	21:15:19	2
4044917	99	23	19,3	cyclictest	4065972	-21	kworker/u8:3+flush-259:0	19:35:00	2
4044917	99	23	19,3	cyclictest	4060791	-21	latency_hist	19:25:01	2
4044914	99	23	18,3	cyclictest	1	-21	systemd	22:45:00	1
4044914	99	23	16,5	cyclictest	4065947	-21	latency_hist	19:30:01	1
4044911	99	23	20,2	cyclictest	4127932	-21	kworker/u8:0+events_unbound	20:55:23	0
4044911	99	23	20,2	cyclictest	4091774	-21	kworker/u8:4+flush-259:0	20:05:21	0
4044911	99	23	20,2	cyclictest	4045083	-21	kworker/u8:4+flush-259:0	19:35:22	0
4044911	99	23	20,2	cyclictest	4045083	-21	kworker/u8:4+flush-259:0	19:35:21	0
4044911	99	23	20,2	cyclictest	127011	-21	kworker/u8:5+events_unbound	23:40:15	0
4044922	99	22	19,2	cyclictest	116875	-21	kworker/u8:1+flush-259:0	00:00:17	3
4044922	99	22	18,3	cyclictest	75133	-21	kworker/u8:0+flush-259:0	23:15:25	3
4044922	99	22	18,3	cyclictest	4164175	-21	kworker/u8:0+flush-259:0	21:05:25	3
4044922	99	22	18,3	cyclictest	127011	-21	kworker/u8:5+events_unbound	23:50:14	3
4044917	99	22	19,2	cyclictest	11250	-21	kworker/u8:3+events_unbound	22:15:01	2
4044911	99	22	20,2	cyclictest	4045083	-21	kworker/u8:4+events_unbound	19:20:25	0
4044911	99	22	19,2	cyclictest	4006506	-21	kworker/u8:2+flush-259:0	19:40:20	0
4044911	99	22	19,2	cyclictest	22514	-21	kworker/u8:1+events_unbound	22:15:21	0
4044911	99	22	19,2	cyclictest	137378	-21	kworker/u8:0+events_unbound	00:03:38	0
4044911	99	22	15,5	cyclictest	80063	-21	latency_hist	22:50:01	0
4044922	99	21	16,4	cyclictest	252	-21	systemd-journal	20:25:01	3
4044922	99	21	16,3	cyclictest	1412	-21	kworker/u8:0+events_unbound	21:35:24	3
4044917	99	21	17,3	cyclictest	4153833	-21	kworker/u8:1+flush-259:0	21:20:24	2
4044917	99	21	17,3	cyclictest	4006506	-21	kworker/u8:2+flush-259:0	19:40:20	2
4044917	99	21	17,3	cyclictest	11250	-21	kworker/u8:3+events_unbound	21:55:21	2
4044917	99	21	16,3	cyclictest	4086591	-21	latency_hist	19:50:00	2
4044914	99	21	15,4	cyclictest	48438	-21	kworker/u8:2+flush-259:0	22:45:18	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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