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 Mon May 04, 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
13317	2	325	319,4	sleep2	0	-21	swapper/2	19:09:37	2
13219	2	322	315,5	sleep1	0	-21	swapper/1	19:08:19	1
13218	2	317	304,10	sleep0	0	-21	swapper/0	19:08:19	0
13221	2	316	308,5	sleep3	0	-21	swapper/3	19:08:21	3
13615	99	299	0,298	cyclictest	9207	-21	kworker/u16:3+efi_rts_wq	21:40:13	3
13615	99	299	0,298	cyclictest	26373	-21	kworker/u16:1+efi_rts_wq	21:10:13	3
13615	99	298	0,297	cyclictest	9207	-21	kworker/u16:3+efi_rts_wq	22:10:18	3
13613	99	298	0,297	cyclictest	20192	-21	kworker/u16:0+efi_rts_wq	20:50:02	1
13610	99	296	0,294	cyclictest	3864	-21	kworker/u16:2+efi_rts_wq	23:00:13	0
13614	99	295	0,294	cyclictest	4050	-21	kworker/u16:0+efi_rts_wq	00:00:13	2
13615	99	294	0,293	cyclictest	4050	-21	kworker/u16:0+efi_rts_wq	00:21:14	3
13614	99	294	0,293	cyclictest	20192	-21	kworker/u16:0+efi_rts_wq	21:20:11	2
13613	99	294	0,293	cyclictest	20192	-21	kworker/u16:0+efi_rts_wq	20:29:58	1
13614	99	293	0,292	cyclictest	3864	-21	kworker/u16:2+efi_rts_wq	23:00:12	2
13615	99	292	0,290	cyclictest	28029	-21	kworker/u16:2+efi_rts_wq	19:20:12	3
13610	99	291	0,290	cyclictest	9207	-21	kworker/u16:3+efi_rts_wq	22:50:13	0
13614	99	290	0,289	cyclictest	28029	-21	kworker/u16:2+efi_rts_wq	19:29:47	2
13613	99	289	0,288	cyclictest	9207	-21	kworker/u16:3+efi_rts_wq	21:45:13	1
13610	99	289	0,288	cyclictest	26373	-21	kworker/u16:1+efi_rts_wq	21:00:12	0
13615	99	288	0,287	cyclictest	20192	-21	kworker/u16:0+efi_rts_wq	21:25:11	3
13613	99	288	0,286	cyclictest	3864	-21	kworker/u16:2+efi_rts_wq	22:45:14	1
13610	99	288	0,287	cyclictest	4050	-21	kworker/u16:0+efi_rts_wq	00:01:11	0
13610	99	288	0,287	cyclictest	22887	-21	kworker/u16:3+efi_rts_wq	00:20:13	0
13614	99	287	0,286	cyclictest	4050	-21	kworker/u16:0+efi_rts_wq	23:55:12	2
13614	99	287	0,286	cyclictest	26373	-21	kworker/u16:1+efi_rts_wq	21:05:14	2
13613	99	287	0,286	cyclictest	14885	-21	kworker/u16:1+efi_rts_wq	23:05:28	1
13615	99	286	0,285	cyclictest	26373	-21	kworker/u16:1+efi_rts_wq	21:00:11	3
13614	99	286	0,285	cyclictest	26373	-21	kworker/u16:1+efi_rts_wq	20:35:14	2
13614	99	286	0,284	cyclictest	31727	-21	kworker/u16:1+efi_rts_wq	23:50:13	2
13610	99	286	0,285	cyclictest	22887	-21	kworker/u16:3+efi_rts_wq	23:40:14	0
13615	99	285	0,282	cyclictest	20192	-21	kworker/u16:0+efi_rts_wq	20:40:11	3
13613	99	285	0,284	cyclictest	20192	-21	kworker/u16:0+efi_rts_wq	21:50:13	1
13613	99	284	0,283	cyclictest	9207	-21	kworker/u16:3+efi_rts_wq	21:35:14	1
13613	99	283	0,282	cyclictest	26373	-21	kworker/u16:1+efi_rts_wq	20:00:12	1
13614	99	282	0,281	cyclictest	26373	-21	kworker/u16:1+efi_rts_wq	19:54:51	2
13610	99	282	0,281	cyclictest	26373	-21	kworker/u16:1+efi_rts_wq	20:15:13	0
13614	99	280	0,277	cyclictest	22887	-21	kworker/u16:3+efi_rts_wq	00:35:14	2
13610	99	280	0,277	cyclictest	22887	-21	kworker/u16:3+efi_rts_wq	23:45:12	0
13615	99	279	0,278	cyclictest	14885	-21	kworker/u16:1+efi_rts_wq	23:25:12	3
13613	99	279	0,278	cyclictest	20192	-21	kworker/u16:0+efi_rts_wq	22:35:15	1
13610	99	279	0,278	cyclictest	4050	-21	kworker/u16:0+efi_rts_wq	00:11:13	0
13614	99	278	0,277	cyclictest	17452	-21	kworker/u16:0+efi_rts_wq	23:10:13	2
13610	99	278	0,276	cyclictest	26373	-21	kworker/u16:1+efi_rts_wq	20:35:13	0
13615	99	277	0,276	cyclictest	20192	-21	kworker/u16:0+efi_rts_wq	22:20:11	3
13613	99	277	0,276	cyclictest	28029	-21	kworker/u16:2+efi_rts_wq	19:30:12	1
13614	99	276	0,275	cyclictest	28029	-21	kworker/u16:2+efi_rts_wq	19:35:14	2
13614	99	275	0,274	cyclictest	9207	-21	kworker/u16:3+efi_rts_wq	22:05:13	2
13614	99	274	0,273	cyclictest	4050	-21	kworker/u16:0+efi_rts_wq	00:10:14	2
13615	99	273	0,272	cyclictest	22887	-21	kworker/u16:3+efi_rts_wq	23:40:14	3
13613	99	272	0,271	cyclictest	20192	-21	kworker/u16:0+efi_rts_wq	20:20:12	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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