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 Mon Jul 06, 2026 12:44:06)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1542196	99	64	47,4	cyclictest	1770404	-21	latency_hist	10:50:01	0
1542196	99	56	48,5	cyclictest	1780700	-21	latency_hist	11:00:00	0
1542207	99	51	47,3	cyclictest	1503726	-21	kworker/u8:2+events_unbound	07:10:02	3
1542196	99	47	40,5	cyclictest	1744652	-21	latency_hist	10:25:01	0
1542196	99	42	34,6	cyclictest	1692608	-21	latency_hist	09:34:59	0
1542199	99	40	33,5	cyclictest	1837824	-21	latency_hist	11:55:01	1
1542203	99	39	36,2	cyclictest	1641156	-21	kworker/u8:1+flush-259:0	09:35:20	2
1542203	99	39	35,2	cyclictest	1723089	-21	kworker/u8:3+events_unbound	10:40:01	2
1542207	99	36	33,2	cyclictest	1723089	-21	kworker/u8:3+events_unbound	10:30:02	3
1542207	99	36	33,2	cyclictest	1547401	-21	kworker/u8:3+events_unbound	09:05:16	3
1542207	99	36	32,3	cyclictest	1796142	-21	latency_hist	11:15:01	3
1542203	99	36	32,3	cyclictest	335557	-21	systemd-journal	07:39:59	2
1542199	99	36	30,4	cyclictest	335557	-21	systemd-journal	11:50:00	1
1542196	99	36	31,4	cyclictest	1827080	-21	gpgv	11:45:01	0
1542207	99	35	32,2	cyclictest	1503726	-21	kworker/u8:2+events_unbound	07:29:59	3
1542207	99	34	32,2	cyclictest	1723089	-21	kworker/u8:3+events_unbound	10:02:15	3
1542207	99	34	29,2	cyclictest	1547401	-21	kworker/u8:3+events_unbound	08:15:17	3
1542196	99	34	29,3	cyclictest	1547401	-21	kworker/u8:3+flush-259:0	08:35:16	0
1542203	99	33	29,3	cyclictest	1547401	-21	kworker/u8:3+events_unbound	08:15:23	2
1542203	99	33	29,3	cyclictest	1503726	-21	kworker/u8:2+flush-259:0	08:00:01	2
1542203	99	33	28,3	cyclictest	509	-21	rs:main		2
1542196	99	33	28,3	cyclictest	1754996	-21	kworker/u8:1+events_unbound	11:40:01	0
1542196	99	33	26,5	cyclictest	1858513	-21	latency_hist	12:15:00	0
1542207	99	32	29,2	cyclictest	1863387	-21	kworker/u8:3+events_unbound	12:20:22	3
1542207	99	32	29,2	cyclictest	1754996	-21	kworker/u8:1+events_unbound	10:35:21	3
1542207	99	32	28,3	cyclictest	1790998	-21	kworker/u8:3+events_unbound	11:58:16	3
1542203	99	32	29,2	cyclictest	1790998	-21	kworker/u8:3+flush-259:0	11:20:00	2
1542199	99	32	28,3	cyclictest	1525900	-21	kworker/u8:1+flush-259:0	07:10:36	1
1542207	99	31	29,2	cyclictest	1547401	-21	kworker/u8:3+events_unbound	08:05:04	3
1542207	99	31	28,2	cyclictest	1509138	-21	kworker/u8:0+flush-259:0	07:17:15	3
1542203	99	31	28,2	cyclictest	1790998	-21	kworker/u8:3+flush-259:0	11:15:00	2
1542203	99	31	28,2	cyclictest	1625511	-21	kworker/u8:0+events_unbound	08:50:21	2
1542203	99	31	28,2	cyclictest	1547401	-21	kworker/u8:3+flush-259:0	07:40:14	2
1542207	99	30	28,2	cyclictest	1641156	-21	kworker/u8:1+flush-259:0	09:20:16	3
1542207	99	30	27,2	cyclictest	1625511	-21	kworker/u8:0+events_unbound	08:30:12	3
1542203	99	30	27,2	cyclictest	1790998	-21	kworker/u8:3+flush-259:0	11:50:18	2
1542203	99	30	27,2	cyclictest	1625511	-21	kworker/u8:0+events_unbound	09:10:23	2
1542203	99	30	27,2	cyclictest	1609961	-21	kworker/u8:4+flush-259:0	08:39:14	2
1542203	99	30	27,2	cyclictest	1503726	-21	kworker/u8:2+events_unbound	07:30:21	2
1542199	99	30	26,3	cyclictest	1625511	-21	kworker/u8:0+flush-259:0	08:50:21	1
1542199	99	30	24,4	cyclictest	1853332	-21	latency_hist	12:10:00	1
1542207	99	29	26,2	cyclictest	1713467	-21	kworker/u8:0+events_unbound	10:07:15	3
1542207	99	29	26,2	cyclictest	1641156	-21	kworker/u8:1+flush-259:0	08:45:22	3
1542207	99	29	26,2	cyclictest	1641156	-21	kworker/u8:1+events_unbound	09:45:19	3
1542207	99	29	23,4	cyclictest	1879120	-21	latency_hist	12:35:00	3
1542203	99	29	26,2	cyclictest	1775771	-21	kworker/u8:3+flush-259:0	11:00:00	2
1542203	99	29	26,2	cyclictest	1547401	-21	kworker/u8:3+flush-259:0	08:55:15	2
1542203	99	29	25,3	cyclictest	1578551	-21	kworker/u8:0+events_unbound	08:00:23	2
1542203	99	29	25,3	cyclictest	1578551	-21	kworker/u8:0+events_unbound	08:00:22	2
1542199	99	29	23,4	cyclictest	335557	-21	systemd-journal	07:26:14	1
1542196	99	29	25,3	cyclictest	507	-21	in:imuxsock	11:55:01	0
1542207	99	28	26,2	cyclictest	1547401	-21	kworker/u8:3+events_unbound	09:17:15	3
1542207	99	28	25,2	cyclictest	1801331	-21	kworker/u8:0+flush-259:0	11:50:11	3
1542207	99	28	25,2	cyclictest	1801331	-21	kworker/u8:0+events_unbound	12:10:13	3
1542207	99	28	25,2	cyclictest	1589491	-21	kworker/u8:1+events_unbound	07:55:24	3
1542203	99	28	25,2	cyclictest	1646325	-21	kworker/u8:2+flush-259:0	09:40:20	2
1542199	99	28	23,3	cyclictest	335557	-21	systemd-journal	11:32:14	1
1542196	99	28	25,2	cyclictest	1609961	-21	kworker/u8:4+flush-259:0	08:15:27	0
1542196	99	28	24,3	cyclictest	1719087	-21	apt-get	10:00:10	0
1542196	99	28	21,5	cyclictest	335557	-21	systemd-journal	09:50:19	0
1542207	99	27	24,2	cyclictest	1790998	-21	kworker/u8:3+events_unbound	11:40:23	3
1542207	99	27	24,2	cyclictest	1754996	-21	kworker/u8:1+events_unbound	11:05:23	3
1542203	99	27	22,3	cyclictest	335557	-21	systemd-journal	08:07:15	2
1542199	99	27	24,2	cyclictest	509	-21	rs:main		1
1542199	99	27	23,3	cyclictest	1754996	-21	kworker/u8:1+events_unbound	11:59:14	1
1542199	99	27	23,3	cyclictest	1588836	-21	latency_hist	07:55:00	1
1542196	99	27	22,4	cyclictest	1547401	-21	kworker/u8:3+flush-259:0	08:50:01	0
1542207	99	26	20,4	cyclictest	1739462	-21	latency_hist	10:20:01	3
1542203	99	26	23,2	cyclictest	1863387	-21	kworker/u8:3+flush-259:0	12:20:15	2
1542203	99	26	21,4	cyclictest	1718587	-21	cp	10:00:00	2
1542199	99	26	23,2	cyclictest	1754996	-21	kworker/u8:1+events_unbound	11:05:21	1
1542199	99	26	22,3	cyclictest	1677341	-21	kworker/u8:4+flush-259:0	09:25:16	1
1542196	99	26	22,3	cyclictest	1863387	-21	kworker/u8:3+flush-259:0	12:20:22	0
1542207	99	25	22,2	cyclictest	1723089	-21	kworker/u8:3+events_unbound	10:45:19	3
1542207	99	25	22,2	cyclictest	1547401	-21	kworker/u8:3+flush-259:0	07:35:27	3
1542203	99	25	22,2	cyclictest	1801331	-21	kworker/u8:0+flush-259:0	12:10:15	2
1542199	99	25	22,2	cyclictest	1641156	-21	kworker/u8:1+events_unbound	09:52:16	1
1542199	99	25	21,3	cyclictest	1503726	-21	kworker/u8:2+events_unbound	07:41:16	1
1542199	99	25	20,4	cyclictest	1724212	-21	/usr/sbin/munin	10:05:14	1
1542196	99	25	17,6	cyclictest	1764365	-21	ntpq	10:40:20	0
1542207	99	24	22,2	cyclictest	1729368	-21	kworker/u8:4+events_unbound	10:11:15	3
1542207	99	24	22,2	cyclictest	1509138	-21	kworker/u8:0+events_unbound	07:21:16	3
1542207	99	24	21,2	cyclictest	1790998	-21	kworker/u8:3+events_unbound	11:25:14	3
1542207	99	24	21,2	cyclictest	1744879	-21	kworker/u8:0+events_unbound	10:25:28	3
1542207	99	24	21,2	cyclictest	1677341	-21	kworker/u8:4+events_unbound	09:30:13	3
1542207	99	24	21,2	cyclictest	1646325	-21	kworker/u8:2+events_unbound	09:10:19	3
1542207	99	24	20,3	cyclictest	1754996	-21	kworker/u8:1+flush-259:0	11:35:14	3
1542203	99	24	22,2	cyclictest	1790998	-21	kworker/u8:3+flush-259:0	11:21:08	2
1542203	99	24	21,2	cyclictest	1837838	-21	kworker/u8:2+flush-259:0	12:25:17	2
1542203	99	24	21,2	cyclictest	1790998	-21	kworker/u8:3+events_unbound	11:25:22	2
1542203	99	24	21,2	cyclictest	1646325	-21	kworker/u8:2+events_unbound	10:00:18	2
1542203	99	24	21,2	cyclictest	1547401	-21	kworker/u8:3+events_unbound	08:10:18	2
1542199	99	24	21,2	cyclictest	1723089	-21	kworker/u8:3+events_unbound	10:38:14	1
1542199	99	24	21,2	cyclictest	1641156	-21	kworker/u8:1+events_unbound	09:20:18	1
1542199	99	24	21,2	cyclictest	1503726	-21	kworker/u8:2+events_unbound	07:31:15	1
1542199	99	24	20,3	cyclictest	1646325	-21	kworker/u8:2+flush-259:0	10:00:21	1
1542199	99	24	20,3	cyclictest	1641156	-21	kworker/u8:1+events_unbound	09:00:15	1
1542199	99	24	18,4	cyclictest	1847296	-21	ntpq	12:00:24	1
1542196	99	24	20,3	cyclictest	1723089	-21	kworker/u8:3+flush-259:0	10:40:00	0
1542196	99	24	19,3	cyclictest	1	-21	systemd	09:05:01	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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