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 Jun 15, 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
11459	2	318	311,5	sleep2	0	-21	swapper/2	19:08:02	2
11315	2	318	304,5	sleep0	0	-21	swapper/0	19:06:11	0
11303	2	317	310,5	sleep3	0	-21	swapper/3	19:06:02	3
11386	2	315	308,4	sleep1	0	-21	swapper/1	19:07:05	1
11878	99	300	0,299	cyclictest	6294	-21	kworker/u16:4+efi_rts_wq	22:45:45	3
11878	99	299	0,297	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	22:30:13	3
11878	99	298	0,297	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	21:15:30	3
11877	99	298	0,297	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	19:30:13	2
11877	99	298	0,297	cyclictest	23731	-21	kworker/u16:4+efi_rts_wq	00:31:20	2
11878	99	296	0,294	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	23:45:13	3
11878	99	295	0,294	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	20:30:12	3
11878	99	295	0,294	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	00:10:14	3
11875	99	295	0,294	cyclictest	23731	-21	kworker/u16:4+efi_rts_wq	00:25:14	0
11875	99	295	0,294	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	19:30:13	0
11876	99	292	0,291	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	22:20:13	1
11876	99	291	0,290	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	20:15:13	1
11876	99	289	0,288	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	22:00:12	1
11878	99	288	0,287	cyclictest	6294	-21	kworker/u16:4+efi_rts_wq	22:50:13	3
11876	99	287	0,286	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	00:35:13	1
11877	99	286	0,285	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	21:50:14	2
11876	99	286	0,285	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	21:30:15	1
11877	99	283	0,282	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	20:10:12	2
11877	99	283	0,282	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	19:15:13	2
11876	99	282	0,281	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	21:05:28	1
11875	99	282	0,280	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	23:50:13	0
11877	99	281	0,280	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	19:35:14	2
11877	99	281	0,280	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	00:16:16	2
11875	99	280	0,279	cyclictest	23731	-21	kworker/u16:4+efi_rts_wq	00:15:13	0
11877	99	279	0,278	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	19:20:12	2
11876	99	279	0,278	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	21:00:28	1
11876	99	278	0,277	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	19:55:13	1
11876	99	277	0,276	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	22:35:10	1
11875	99	277	0,276	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	21:20:30	0
11875	99	276	0,275	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	21:40:13	0
11877	99	275	0,274	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	22:05:38	2
11875	99	275	0,274	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	21:25:13	0
11878	99	274	0,273	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	22:15:39	3
11878	99	274	0,271	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	21:35:12	3
11876	99	274	0,273	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	19:40:12	1
11876	99	273	0,272	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	20:35:23	1
11875	99	273	0,271	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	22:35:10	0
11878	99	272	0,271	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	20:45:25	3
11878	99	271	0,270	cyclictest	23731	-21	kworker/u16:4+efi_rts_wq	23:35:12	3
11877	99	271	0,270	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	23:55:12	2
11877	99	271	0,270	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	20:40:13	2
11876	99	270	0,269	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	22:25:12	1
11876	99	268	0,267	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	19:10:12	1
11878	99	267	0,266	cyclictest	28297	-21	kworker/u16:0+efi_rts_wq	19:50:12	3
11878	99	267	0,266	cyclictest	23731	-21	kworker/u16:4+efi_rts_wq	23:40:13	3
11878	99	267	0,266	cyclictest	23665	-21	kworker/u16:3+efi_rts_wq	22:25:12	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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