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 30, 2026 00:43:56)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
3701	2	319	304,5	sleep0	0	-21	swapper/0	19:09:59	0
3645	2	318	310,5	sleep3	0	-21	swapper/3	19:09:19	3
1866	2	317	303,5	sleep2	0	-21	swapper/2	19:05:08	2
3476	2	316	302,5	sleep1	0	-21	swapper/1	19:07:07	1
3965	99	308	0,305	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	22:30:13	0
3968	99	300	0,299	cyclictest	5779	-21	kworker/u16:0+efi_rts_wq	20:05:13	3
3968	99	300	0,299	cyclictest	11353	-21	kworker/u16:1+efi_rts_wq	23:10:11	3
3966	99	299	0,296	cyclictest	5779	-21	kworker/u16:0+efi_rts_wq	22:15:14	1
3966	99	297	0,296	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	22:40:13	1
3967	99	296	0,295	cyclictest	16244	-21	kworker/u16:0+efi_rts_wq	23:50:10	2
3965	99	296	0,295	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	22:20:13	0
3968	99	295	0,294	cyclictest	5779	-21	kworker/u16:0+efi_rts_wq	20:40:11	3
3968	99	295	0,294	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	22:00:03	3
3967	99	293	0,292	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	20:40:11	2
3965	99	293	0,291	cyclictest	808	-21	kworker/u16:3+efi_rts_wq	23:00:11	0
3968	99	292	0,291	cyclictest	5779	-21	kworker/u16:0+efi_rts_wq	20:10:11	3
3965	99	292	0,291	cyclictest	16244	-21	kworker/u16:0+efi_rts_wq	00:15:13	0
3968	99	291	0,290	cyclictest	18261	-21	kworker/u16:4+efi_rts_wq	00:00:12	3
3968	99	291	0,289	cyclictest	28207	-21	kworker/u16:2+efi_rts_wq	23:20:13	3
3966	99	291	0,290	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	19:19:32	1
3968	99	288	0,287	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	22:30:12	3
3968	99	288	0,287	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	22:10:13	3
3968	99	288	0,287	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	19:39:36	3
3965	99	286	0,285	cyclictest	808	-21	kworker/u16:3+efi_rts_wq	23:05:12	0
3965	99	286	0,285	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	21:50:13	0
3968	99	284	0,283	cyclictest	5779	-21	kworker/u16:0+efi_rts_wq	19:30:13	3
3966	99	284	0,283	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	20:25:12	1
3966	99	282	0,281	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	19:20:13	1
3968	99	280	0,279	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	21:04:52	3
3966	99	280	0,279	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	19:40:13	1
3967	99	279	0,277	cyclictest	18261	-21	kworker/u16:4+efi_rts_wq	23:30:10	2
3968	99	278	0,277	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	22:35:12	3
3968	99	278	0,276	cyclictest	16244	-21	kworker/u16:0+efi_rts_wq	00:30:12	3
3967	99	278	0,277	cyclictest	16244	-21	kworker/u16:0+efi_rts_wq	23:40:12	2
3966	99	278	0,277	cyclictest	30740	-21	kworker/u16:1+efi_rts_wq	22:45:14	1
3966	99	276	0,274	cyclictest	18261	-21	kworker/u16:4+efi_rts_wq	00:00:13	1
3966	99	275	0,274	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	22:35:12	1
3966	99	275	0,274	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	21:10:14	1
3966	99	274	0,273	cyclictest	28207	-21	kworker/u16:2+efi_rts_wq	23:15:14	1
3966	99	273	0,272	cyclictest	5779	-21	kworker/u16:0+efi_rts_wq	21:05:13	1
3968	99	272	0,271	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	22:20:12	3
3968	99	271	0,270	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	19:25:13	3
3968	99	271	0,270	cyclictest	18261	-21	kworker/u16:4+efi_rts_wq	23:55:15	3
3968	99	270	0,269	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	21:45:15	3
3967	99	270	0,269	cyclictest	28207	-21	kworker/u16:2+efi_rts_wq	22:55:13	2
3966	99	268	0,267	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	20:45:12	1
3966	99	267	0,266	cyclictest	23175	-21	kworker/u16:3+efi_rts_wq	21:50:01	1
3965	99	267	0,266	cyclictest	5779	-21	kworker/u16:0+efi_rts_wq	21:25:12	0
3966	99	265	0,264	cyclictest	5779	-21	kworker/u16:0+efi_rts_wq	21:35:13	1
3965	99	265	0,264	cyclictest	5779	-21	kworker/u16:0+efi_rts_wq	20:15:12	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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