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 Nov 30, 2025 00:43:56)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
13826	2	336	311,23	sleep0	0	-21	swapper/0	19:05:34	0
14112	2	317	303,5	sleep2	0	-21	swapper/2	19:09:17	2
13949	2	316	308,5	sleep1	0	-21	swapper/1	19:07:12	1
13896	2	315	307,5	sleep3	0	-21	swapper/3	19:06:30	3
14438	99	303	0,302	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	23:40:16	3
14435	99	301	0,299	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	19:15:15	0
14435	99	298	0,297	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	21:45:15	0
14435	99	298	0,297	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	19:25:13	0
14438	99	297	0,295	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	19:35:15	3
14438	99	293	0,292	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	00:35:41	3
14436	99	293	0,292	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	22:05:15	1
14438	99	292	0,291	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	21:40:15	3
14435	99	292	0,291	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	22:45:15	0
14438	99	291	0,290	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	20:30:14	3
14436	99	291	0,290	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	21:05:16	1
14435	99	289	0,288	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	20:45:15	0
14436	99	287	0,284	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	21:00:14	1
14438	99	286	0,285	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	20:20:14	3
14438	99	286	0,285	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	21:10:15	3
14436	99	285	0,284	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	19:40:15	1
14438	99	284	0,283	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	20:40:15	3
14437	99	284	0,283	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	20:25:14	2
14438	99	283	0,282	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	22:20:14	3
14437	99	283	0,282	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	23:15:13	2
14436	99	280	0,279	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	23:20:14	1
14436	99	280	0,279	cyclictest	18202	-21	kworker/u16:2+efi_rts_wq	23:10:13	1
14438	99	279	0,278	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	19:25:14	3
14437	99	279	0,278	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	23:05:25	2
14437	99	278	0,277	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	23:50:14	2
14437	99	277	0,276	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	21:25:13	2
14437	99	277	0,275	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	23:55:13	2
14436	99	277	0,276	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	21:45:15	1
14437	99	276	0,275	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	22:35:13	2
14436	99	276	0,275	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	23:30:12	1
14438	99	275	0,274	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	00:10:14	3
14438	99	274	0,272	cyclictest	10579	-21	kworker/u16:1+efi_rts_wq	22:50:15	3
14438	99	274	0,272	cyclictest	10579	-21	kworker/u16:1+efi_rts_wq	22:50:15	3
14437	99	274	0,273	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	20:45:15	2
14435	99	274	0,273	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	22:35:20	0
14435	99	274	0,273	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	19:20:14	0
14435	99	274	0,272	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	21:35:14	0
14437	99	273	0,272	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	21:55:14	2
14438	99	272	0,271	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	00:00:36	3
14436	99	272	0,271	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	20:10:16	1
14436	99	272	0,271	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	19:24:47	1
14436	99	271	0,270	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	20:09:55	1
14435	99	270	0,269	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	19:34:48	0
14436	99	269	0,268	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	22:40:20	1
14436	99	269	0,268	cyclictest	28433	-21	kworker/u16:3+efi_rts_wq	00:25:15	1
14438	99	268	0,267	cyclictest	1097	-21	kworker/u16:0+efi_rts_wq	00:20:14	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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