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 50 highest latencies:

System rackeslot4s.osadl.org (updated Sat Apr 18, 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
819019	99	43	41,2	cyclictest	953773	-21	kworker/u8:2+flush-259:0	21:50:00	1
819019	99	42	38,2	cyclictest	1026640	-21	kworker/u8:1+flush-259:0	23:45:15	1
819017	99	42	39,2	cyclictest	1026640	-21	kworker/u8:1+events_unbound	22:40:22	0
819025	99	40	37,2	cyclictest	985347	-21	kworker/u8:0+flush-259:0	22:15:21	3
819025	99	39	36,2	cyclictest	834152	-21	kworker/u8:2+events_unbound	19:40:21	3
819017	99	39	33,4	cyclictest	252	-21	systemd-journal	19:21:23	0
819017	99	38	35,2	cyclictest	834152	-21	kworker/u8:2+events_unbound	19:48:25	0
819017	99	38	32,4	cyclictest	984404	-21	ntpq	21:45:20	0
819017	99	37	35,2	cyclictest	839644	-21	kworker/u8:3+events_unbound	19:41:22	0
819017	99	37	33,3	cyclictest	1021269	-21	kworker/u8:3+events_unbound	22:27:24	0
819017	99	37	31,4	cyclictest	818936	-21	latency_hist	19:10:01	0
819017	99	37	30,5	cyclictest	252	-21	systemd-journal	20:24:59	0
819025	99	36	34,1	cyclictest	814024	-21	kworker/u8:1+flush-259:0	19:15:24	3
819025	99	36	31,4	cyclictest	1057592	-21	latency_hist	23:00:01	3
819019	99	36	33,2	cyclictest	1026640	-21	kworker/u8:1+flush-259:0	22:40:00	1
819017	99	36	32,3	cyclictest	1139784	-21	kworker/u8:1+events_unbound	00:36:24	0
819017	99	36	32,3	cyclictest	1119875	-21	kworker/u8:0+events_unbound	23:58:01	0
819025	99	35	31,2	cyclictest	839644	-21	kworker/u8:3+flush-259:0	19:45:24	3
819019	99	35	32,2	cyclictest	834152	-21	kworker/u8:2+flush-259:0	19:35:20	1
819017	99	35	32,2	cyclictest	1139784	-21	kworker/u8:1+events_unbound	00:33:04	0
819025	99	34	31,2	cyclictest	933485	-21	kworker/u8:1+flush-259:0	21:00:24	3
819025	99	34	31,2	cyclictest	839644	-21	kworker/u8:3+flush-259:0	19:30:24	3
819025	99	34	30,3	cyclictest	814024	-21	kworker/u8:1+events_unbound	19:15:01	3
819019	99	34	31,2	cyclictest	839644	-21	kworker/u8:3+flush-259:0	20:35:24	1
819017	99	34	31,2	cyclictest	985347	-21	kworker/u8:0+events_unbound	22:02:24	0
819025	99	33	30,2	cyclictest	969949	-21	kworker/u8:3+flush-259:0	21:45:00	3
819025	99	33	29,3	cyclictest	1130492	-21	kworker/u8:2+flush-259:0	00:25:17	3
819025	99	33	29,3	cyclictest	1130492	-21	kworker/u8:2+flush-259:0	00:20:21	3
819025	99	33	26,3	cyclictest	870602	-21	kworker/u8:1+events_unbound	20:10:21	3
819019	99	33	30,2	cyclictest	870602	-21	kworker/u8:1+flush-259:0	20:15:15	1
819019	99	33	29,3	cyclictest	933485	-21	kworker/u8:1+flush-259:0	21:05:24	1
819017	99	33	31,2	cyclictest	839644	-21	kworker/u8:3+events_unbound	20:06:23	0
819017	99	33	30,2	cyclictest	1109912	-21	kworker/u8:3+events_unbound	00:00:14	0
819017	99	33	30,2	cyclictest	1099062	-21	kworker/u8:2+events_unbound	23:52:58	0
819017	99	33	30,2	cyclictest	1099062	-21	kworker/u8:2+events_unbound	23:43:24	0
819017	99	33	29,3	cyclictest	933485	-21	kworker/u8:1+events_unbound	21:12:24	0
819017	99	33	27,4	cyclictest	1073043	-21	latency_hist	23:15:01	0
819025	99	32	29,2	cyclictest	907434	-21	kworker/u8:2+flush-259:0	20:45:17	3
819025	99	32	29,2	cyclictest	907434	-21	kworker/u8:2+flush-259:0	20:45:17	3
819025	99	32	29,2	cyclictest	1130492	-21	kworker/u8:2+flush-259:0	00:15:15	3
819019	99	32	29,2	cyclictest	1052349	-21	kworker/u8:0+flush-259:0	22:55:17	1
819019	99	32	29,2	cyclictest	1021269	-21	kworker/u8:3+flush-259:0	23:00:20	1
819017	99	32	29,3	cyclictest	1021269	-21	kworker/u8:3+events_unbound	23:02:25	0
819017	99	32	29,2	cyclictest	985347	-21	kworker/u8:0+events_unbound	21:51:25	0
819017	99	32	29,2	cyclictest	907434	-21	kworker/u8:2+events_unbound	20:52:23	0
819017	99	32	29,2	cyclictest	839644	-21	kworker/u8:3+events_unbound	19:57:24	0
819017	99	32	28,3	cyclictest	1109912	-21	kworker/u8:3+events_unbound	00:07:24	0
819025	99	31	28,2	cyclictest	953773	-21	kworker/u8:2+flush-259:0	21:55:01	3
819019	99	31	29,1	cyclictest	985347	-21	kworker/u8:0+events_unbound	22:10:14	1
819019	99	31	26,4	cyclictest	1093168	-21	ntpq	23:30:21	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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