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 Nov 19, 2025 00:43:55)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
8604	2	320	313,4	sleep1	0	-21	swapper/1	19:07:11	1
8792	2	319	303,5	sleep0	0	-21	swapper/0	19:09:35	0
8492	2	316	308,5	sleep3	0	-21	swapper/3	19:05:45	3
8501	2	315	307,5	sleep2	0	-21	swapper/2	19:05:52	2
9091	99	301	0,300	cyclictest	2270	-21	kworker/u16:1+efi_rts_wq	22:45:17	2
9089	99	301	0,299	cyclictest	7414	-21	kworker/u16:2+efi_rts_wq	23:30:14	0
9089	99	301	0,299	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	22:05:15	0
9092	99	300	0,299	cyclictest	32173	-21	kworker/u16:0+efi_rts_wq	23:00:15	3
9090	99	300	0,299	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	21:29:34	1
9089	99	299	0,296	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	21:25:16	0
9089	99	298	0,297	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	21:24:32	0
9090	99	296	0,295	cyclictest	32173	-21	kworker/u16:0+efi_rts_wq	22:59:50	1
9090	99	292	0,291	cyclictest	3441	-21	kworker/u16:3+efi_rts_wq	00:00:00	1
9092	99	291	0,290	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	21:59:39	3
9090	99	291	0,290	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	20:15:17	1
9092	99	288	0,287	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	21:45:16	3
9092	99	288	0,287	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	21:05:15	3
9091	99	288	0,287	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	19:25:14	2
9091	99	288	0,287	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	20:10:17	2
9091	99	287	0,286	cyclictest	32173	-21	kworker/u16:0+efi_rts_wq	23:35:16	2
9090	99	287	0,286	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	19:15:16	1
9089	99	286	0,283	cyclictest	3441	-21	kworker/u16:3+efi_rts_wq	00:35:16	0
9089	99	286	0,283	cyclictest	3441	-21	kworker/u16:3+efi_rts_wq	00:35:15	0
9091	99	285	0,283	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	20:15:17	2
9090	99	285	0,284	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	21:35:14	1
9092	99	284	0,283	cyclictest	7414	-21	kworker/u16:2+efi_rts_wq	23:45:14	3
9090	99	284	0,283	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	22:20:14	1
9091	99	283	0,282	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	22:40:15	2
9091	99	283	0,281	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	20:50:16	2
9092	99	281	0,280	cyclictest	7414	-21	kworker/u16:2+efi_rts_wq	23:24:53	3
9092	99	280	0,279	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	21:15:14	3
9092	99	280	0,279	cyclictest	32173	-21	kworker/u16:0+efi_rts_wq	23:40:14	3
9092	99	280	0,279	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	20:14:20	3
9092	99	278	0,277	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	20:34:24	3
9090	99	278	0,277	cyclictest	7414	-21	kworker/u16:2+efi_rts_wq	23:20:15	1
9089	99	278	0,277	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	21:50:15	0
9090	99	276	0,275	cyclictest	32173	-21	kworker/u16:0+efi_rts_wq	00:10:17	1
9092	99	275	0,274	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	22:15:15	3
9092	99	274	0,273	cyclictest	5862	-21	kworker/u16:1+efi_rts_wq	00:30:14	3
9092	99	274	0,272	cyclictest	7414	-21	kworker/u16:2+efi_rts_wq	23:05:14	3
9091	99	274	0,273	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	22:35:15	2
9090	99	273	0,272	cyclictest	7414	-21	kworker/u16:2+efi_rts_wq	23:29:55	1
9090	99	273	0,272	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	19:50:15	1
9092	99	272	0,269	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	22:05:15	3
9091	99	272	0,270	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	20:05:15	2
9090	99	272	0,271	cyclictest	3441	-21	kworker/u16:3+efi_rts_wq	00:05:14	1
9091	99	268	0,267	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	19:15:15	2
9092	99	266	0,265	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	19:30:17	3
9092	99	265	0,264	cyclictest	23149	-21	kworker/u16:3+efi_rts_wq	21:44:37	3
9091	99	265	0,263	cyclictest	9128	-21	kworker/u16:2+efi_rts_wq	22:30:14	2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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