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 Wed Aug 12, 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
10467	2	320	314,4	sleep1	0	-21	swapper/1	19:08:55	1
10367	2	315	308,5	sleep3	0	-21	swapper/3	19:07:37	3
10263	2	315	309,4	sleep2	0	-21	swapper/2	19:06:16	2
10207	2	314	307,4	sleep0	0	-21	swapper/0	19:05:33	0
10817	99	300	0,299	cyclictest	29682	-21	kworker/u16:0+efi_rts_wq	23:44:58	1
10819	99	298	0,297	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	22:34:48	3
10819	99	298	0,297	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	22:10:12	3
10818	99	296	0,295	cyclictest	527	-21	kworker/u16:2+efi_rts_wq	23:50:12	2
10817	99	295	0,294	cyclictest	29682	-21	kworker/u16:0+efi_rts_wq	00:15:14	1
10816	99	294	0,293	cyclictest	29682	-21	kworker/u16:0+efi_rts_wq	00:20:14	0
10819	99	293	0,291	cyclictest	12784	-21	kworker/u16:1+efi_rts_wq	23:15:12	3
10817	99	293	0,291	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	22:50:14	1
10817	99	292	0,291	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	21:05:14	1
10816	99	292	0,291	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	20:20:14	0
10819	99	290	0,289	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	20:30:14	3
10818	99	289	0,288	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	19:50:10	2
10819	99	288	0,287	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	19:24:14	3
10819	99	287	0,286	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	22:55:12	3
10816	99	287	0,285	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	21:15:14	0
10819	99	285	0,284	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	21:34:38	3
10819	99	285	0,284	cyclictest	10238	-21	kworker/u16:3+efi_rts_wq	23:00:12	3
10817	99	285	0,284	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	21:00:15	1
10816	99	285	0,284	cyclictest	8260	-21	kworker/u16:1+efi_rts_wq	00:00:01	0
10819	99	284	0,283	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	20:00:16	3
10819	99	283	0,282	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	19:15:14	3
10816	99	283	0,280	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	19:30:13	0
10819	99	281	0,280	cyclictest	8260	-21	kworker/u16:1+efi_rts_wq	00:05:03	3
10819	99	281	0,280	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	21:10:14	3
10818	99	281	0,280	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	22:30:15	2
10817	99	280	0,279	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	20:05:20	1
10817	99	280	0,279	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	22:24:45	1
10817	99	280	0,279	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	22:24:44	1
10818	99	276	0,275	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	20:35:15	2
10816	99	276	0,275	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	22:35:14	0
10819	99	274	0,272	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	22:49:49	3
10818	99	274	0,273	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	20:55:13	2
10818	99	274	0,273	cyclictest	12784	-21	kworker/u16:1+efi_rts_wq	23:15:12	2
10817	99	274	0,273	cyclictest	10238	-21	kworker/u16:3+efi_rts_wq	23:10:13	1
10816	99	274	0,273	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	22:19:44	0
10817	99	273	0,272	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	21:50:10	1
10816	99	273	0,272	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	21:40:12	0
10816	99	273	0,272	cyclictest	29682	-21	kworker/u16:0+efi_rts_wq	00:30:13	0
10819	99	272	0,271	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	20:45:14	3
10819	99	272	0,271	cyclictest	29682	-21	kworker/u16:0+efi_rts_wq	00:25:13	3
10817	99	272	0,271	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	19:15:14	1
10818	99	270	0,269	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	19:45:13	2
10819	99	269	0,268	cyclictest	24917	-21	kworker/u16:0+efi_rts_wq	21:35:13	3
10818	99	269	0,268	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	19:10:12	2
10817	99	268	0,267	cyclictest	702	-21	kworker/u16:2+efi_rts_wq	20:10:15	1
10819	99	266	0,265	cyclictest	29682	-21	kworker/u16:0+efi_rts_wq	00:30:12	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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