OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, slot #3

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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system

Characteristics of the 50 highest latencies:

System rackcslot3s.osadl.org (updated Sun Aug 09, 2026 00:43:54)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
22690	2	318	304,4	sleep3	0	-21	swapper/3	19:08:45	3
22731	2	317	303,5	sleep2	0	-21	swapper/2	19:09:16	2
22631	2	317	310,4	sleep1	0	-21	swapper/1	19:07:59	1
22505	2	317	303,5	sleep0	0	-21	swapper/0	19:06:21	0
23165	99	303	0,300	cyclictest	20191	-21	kworker/u16:3+efi_rts_wq	23:35:14	1
23169	99	299	0,298	cyclictest	20191	-21	kworker/u16:3+efi_rts_wq	23:55:13	3
23164	99	299	0,298	cyclictest	20191	-21	kworker/u16:3+efi_rts_wq	23:45:13	0
23167	99	298	0,297	cyclictest	6658	-21	kworker/u16:3+efi_rts_wq	19:15:14	2
23167	99	297	0,296	cyclictest	20191	-21	kworker/u16:3+efi_rts_wq	23:45:14	2
23164	99	297	0,296	cyclictest	4859	-21	kworker/u16:1+efi_rts_wq	23:40:42	0
23167	99	296	0,295	cyclictest	16524	-21	kworker/u16:1+efi_rts_wq	21:40:18	2
23165	99	296	0,295	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	22:40:13	1
23167	99	294	0,293	cyclictest	6658	-21	kworker/u16:3+efi_rts_wq	19:45:13	2
23167	99	293	0,292	cyclictest	4634	-21	kworker/u16:2+efi_rts_wq	19:40:13	2
23167	99	292	0,291	cyclictest	4634	-21	kworker/u16:2+efi_rts_wq	21:05:13	2
23169	99	291	0,290	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	21:00:14	3
23167	99	290	0,289	cyclictest	4859	-21	kworker/u16:1+efi_rts_wq	00:30:13	2
23169	99	289	0,288	cyclictest	4634	-21	kworker/u16:2+efi_rts_wq	21:25:15	3
23169	99	287	0,286	cyclictest	6658	-21	kworker/u16:3+efi_rts_wq	19:10:14	3
23164	99	287	0,286	cyclictest	20191	-21	kworker/u16:3+efi_rts_wq	23:55:45	0
23169	99	285	0,284	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	22:40:14	3
23165	99	285	0,284	cyclictest	4634	-21	kworker/u16:2+efi_rts_wq	20:30:14	1
23165	99	284	0,283	cyclictest	4634	-21	kworker/u16:2+efi_rts_wq	19:55:13	1
23164	99	283	0,282	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	20:40:12	0
23169	99	282	0,281	cyclictest	16524	-21	kworker/u16:1+efi_rts_wq	22:00:12	3
23165	99	282	0,281	cyclictest	6658	-21	kworker/u16:3+efi_rts_wq	19:34:55	1
23164	99	282	0,281	cyclictest	20191	-21	kworker/u16:3+efi_rts_wq	23:10:12	0
23165	99	281	0,280	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	20:40:07	1
23167	99	280	0,279	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	21:30:12	2
23165	99	280	0,279	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	21:40:13	1
23164	99	278	0,277	cyclictest	20191	-21	kworker/u16:3+efi_rts_wq	23:05:35	0
23167	99	277	0,276	cyclictest	6658	-21	kworker/u16:3+efi_rts_wq	19:30:11	2
23167	99	277	0,276	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	21:20:13	2
23169	99	276	0,275	cyclictest	20191	-21	kworker/u16:3+efi_rts_wq	23:50:12	3
23167	99	276	0,275	cyclictest	6658	-21	kworker/u16:3+efi_rts_wq	19:24:53	2
23167	99	276	0,275	cyclictest	4634	-21	kworker/u16:2+efi_rts_wq	20:25:13	2
23165	99	274	0,273	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	19:50:14	1
23165	99	274	0,273	cyclictest	21076	-21	kworker/u16:0+efi_rts_wq	00:35:13	1
23169	99	273	0,272	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	22:25:15	3
23167	99	273	0,272	cyclictest	4859	-21	kworker/u16:1+efi_rts_wq	00:25:14	2
23167	99	272	0,271	cyclictest	16524	-21	kworker/u16:1+efi_rts_wq	22:35:15	2
23164	99	272	0,271	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	20:55:10	0
23167	99	270	0,269	cyclictest	4634	-21	kworker/u16:2+efi_rts_wq	21:10:13	2
23169	99	269	0,268	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	21:35:14	3
23167	99	268	0,267	cyclictest	32617	-21	kworker/u16:0+efi_rts_wq	23:15:13	2
23169	99	266	0,265	cyclictest	16524	-21	kworker/u16:1+efi_rts_wq	23:10:35	3
23165	99	266	0,265	cyclictest	4859	-21	kworker/u16:1+efi_rts_wq	23:40:12	1
23164	99	266	0,265	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	20:10:14	0
23169	99	264	0,263	cyclictest	4343	-21	kworker/u16:0+efi_rts_wq	20:10:14	3
23165	99	264	0,262	cyclictest	32617	-21	kworker/u16:0+efi_rts_wq	23:25:12	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17