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 Fri Aug 21, 2026 00:43:55)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
7698	2	324	318,4	sleep2	0	-21	swapper/2	19:08:22	2
7731	2	317	303,11	sleep0	0	-21	swapper/0	19:08:48	0
7734	2	315	307,5	sleep3	0	-21	swapper/3	19:08:51	3
7530	2	314	307,5	sleep1	0	-21	swapper/1	19:06:13	1
8092	99	301	0,299	cyclictest	17441	-21	kworker/u16:2+efi_rts_wq	23:25:12	1
8092	99	300	0,298	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	19:15:14	1
8092	99	298	0,297	cyclictest	20179	-21	kworker/u16:0+efi_rts_wq	00:35:58	1
8094	99	297	0,296	cyclictest	28926	-21	kworker/u16:1+efi_rts_wq	00:25:56	3
8092	99	296	0,295	cyclictest	26529	-21	kworker/u16:0+efi_rts_wq	23:50:48	1
8092	99	295	0,294	cyclictest	14628	-21	kworker/u16:3+efi_rts_wq	21:40:13	1
8094	99	294	0,293	cyclictest	14628	-21	kworker/u16:3+efi_rts_wq	20:15:05	3
8091	99	294	0,293	cyclictest	28926	-21	kworker/u16:1+efi_rts_wq	00:00:50	0
8091	99	294	0,293	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	19:45:12	0
8094	99	293	0,292	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	21:10:12	3
8091	99	293	0,292	cyclictest	14628	-21	kworker/u16:3+efi_rts_wq	20:10:04	0
8092	99	292	0,290	cyclictest	14822	-21	kworker/u16:3+efi_rts_wq	23:15:14	1
8091	99	292	0,290	cyclictest	28926	-21	kworker/u16:1+efi_rts_wq	23:40:13	0
8094	99	291	0,290	cyclictest	14628	-21	kworker/u16:3+efi_rts_wq	20:00:12	3
8093	99	291	0,290	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	22:15:29	2
8093	99	289	0,288	cyclictest	14628	-21	kworker/u16:3+efi_rts_wq	19:55:13	2
8092	99	288	0,287	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	20:15:12	1
8091	99	288	0,286	cyclictest	17441	-21	kworker/u16:2+efi_rts_wq	23:30:45	0
8091	99	287	0,286	cyclictest	14628	-21	kworker/u16:3+efi_rts_wq	20:55:12	0
8091	99	287	0,286	cyclictest	14628	-21	kworker/u16:3+efi_rts_wq	20:40:13	0
8094	99	286	0,285	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	20:45:13	3
8091	99	286	0,285	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	20:50:11	0
8092	99	285	0,284	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	21:35:14	1
8094	99	284	0,283	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	20:30:12	3
8092	99	284	0,283	cyclictest	14628	-21	kworker/u16:3+efi_rts_wq	19:25:14	1
8091	99	284	0,283	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	20:35:12	0
8092	99	283	0,282	cyclictest	14628	-21	kworker/u16:3+efi_rts_wq	21:45:13	1
8094	99	282	0,281	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	19:55:01	3
8091	99	282	0,281	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	21:10:14	0
8094	99	281	0,280	cyclictest	20179	-21	kworker/u16:0+efi_rts_wq	00:35:14	3
8092	99	281	0,280	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	22:50:12	1
8092	99	281	0,280	cyclictest	12308	-21	kworker/u16:0+efi_rts_wq	23:05:13	1
8091	99	281	0,280	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	22:25:13	0
8091	99	281	0,279	cyclictest	23890	-21	kworker/u16:3+efi_rts_wq	23:35:15	0
8094	99	280	0,279	cyclictest	12308	-21	kworker/u16:0+efi_rts_wq	23:05:40	3
8092	99	280	0,279	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	22:25:13	1
8093	99	279	0,278	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	22:50:12	2
8091	99	279	0,278	cyclictest	28926	-21	kworker/u16:1+efi_rts_wq	00:15:54	0
8091	99	275	0,274	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	21:55:12	0
8092	99	274	0,273	cyclictest	7194	-21	kworker/u16:1+efi_rts_wq	23:20:42	1
8091	99	274	0,271	cyclictest	14628	-21	kworker/u16:3+efi_rts_wq	21:50:12	0
8094	99	272	0,271	cyclictest	7194	-21	kworker/u16:1+efi_rts_wq	23:20:12	3
8091	99	272	0,271	cyclictest	14628	-21	kworker/u16:3+efi_rts_wq	22:40:11	0
8093	99	271	0,268	cyclictest	26529	-21	kworker/u16:0+efi_rts_wq	23:45:14	2
8092	99	271	0,269	cyclictest	28926	-21	kworker/u16:1+efi_rts_wq	00:10:11	1
8094	99	270	0,269	cyclictest	21391	-21	kworker/u16:0+efi_rts_wq	19:15:14	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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