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 Sat Dec 06, 2025 00:43:52)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
6759	2	327	320,4	sleep1	0	-21	swapper/1	19:08:36	1
6627	2	319	311,5	sleep2	0	-21	swapper/2	19:06:53	2
6728	2	317	303,5	sleep0	0	-21	swapper/0	19:08:11	0
6857	2	316	309,5	sleep3	0	-21	swapper/3	19:09:50	3
7136	99	310	0,307	cyclictest	25802	-21	kworker/u16:3+efi_rts_wq	22:35:13	3
7136	99	298	0,297	cyclictest	25802	-21	kworker/u16:3+efi_rts_wq	22:55:14	3
7136	99	298	0,296	cyclictest	17167	-21	kworker/u16:3+efi_rts_wq	23:24:55	3
7134	99	298	0,297	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	21:50:12	1
7135	99	297	0,296	cyclictest	25802	-21	kworker/u16:3+efi_rts_wq	22:30:13	2
7136	99	294	0,293	cyclictest	25802	-21	kworker/u16:3+efi_rts_wq	22:40:15	3
7135	99	293	0,292	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	23:15:13	2
7135	99	292	0,291	cyclictest	6842	-21	kworker/u16:0+efi_rts_wq	23:35:13	2
7134	99	292	0,291	cyclictest	25802	-21	kworker/u16:3+efi_rts_wq	22:00:12	1
7135	99	291	0,290	cyclictest	17167	-21	kworker/u16:3+efi_rts_wq	23:20:15	2
7135	99	291	0,290	cyclictest	17167	-21	kworker/u16:3+efi_rts_wq	00:30:15	2
7135	99	291	0,289	cyclictest	6842	-21	kworker/u16:0+efi_rts_wq	00:15:13	2
7136	99	290	0,289	cyclictest	6842	-21	kworker/u16:0+efi_rts_wq	23:51:35	3
7135	99	290	0,289	cyclictest	25802	-21	kworker/u16:3+efi_rts_wq	20:20:13	2
7136	99	289	0,288	cyclictest	6842	-21	kworker/u16:0+efi_rts_wq	00:00:14	3
7136	99	287	0,286	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	22:25:17	3
7135	99	287	0,286	cyclictest	6842	-21	kworker/u16:0+efi_rts_wq	23:55:15	2
7134	99	287	0,286	cyclictest	17167	-21	kworker/u16:3+efi_rts_wq	23:25:15	1
7135	99	286	0,285	cyclictest	6842	-21	kworker/u16:0+efi_rts_wq	00:00:15	2
7136	99	284	0,283	cyclictest	17167	-21	kworker/u16:3+efi_rts_wq	00:20:11	3
7136	99	283	0,282	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	22:15:16	3
7136	99	282	0,281	cyclictest	17167	-21	kworker/u16:3+efi_rts_wq	00:31:42	3
7134	99	282	0,281	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	22:25:17	1
7135	99	279	0,278	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	19:40:13	2
7136	99	278	0,277	cyclictest	17167	-21	kworker/u16:3+efi_rts_wq	23:30:13	3
7135	99	278	0,276	cyclictest	6842	-21	kworker/u16:0+efi_rts_wq	23:00:12	2
7134	99	278	0,277	cyclictest	17167	-21	kworker/u16:3+efi_rts_wq	00:30:15	1
7135	99	277	0,276	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	22:05:13	2
7134	99	277	0,276	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	21:30:13	1
7135	99	275	0,274	cyclictest	25802	-21	kworker/u16:3+efi_rts_wq	21:09:29	2
7136	99	274	0,273	cyclictest	25802	-21	kworker/u16:3+efi_rts_wq	22:24:44	3
7135	99	274	0,273	cyclictest	25802	-21	kworker/u16:3+efi_rts_wq	20:00:13	2
7136	99	272	0,271	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	20:55:14	3
7135	99	272	0,271	cyclictest	17167	-21	kworker/u16:3+efi_rts_wq	00:10:12	2
7135	99	271	0,270	cyclictest	6842	-21	kworker/u16:0+efi_rts_wq	00:26:42	2
7135	99	271	0,270	cyclictest	25802	-21	kworker/u16:3+efi_rts_wq	21:45:12	2
7133	99	271	0,270	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	21:35:13	0
7133	99	271	0,270	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	19:55:12	0
7135	99	268	0,267	cyclictest	25802	-21	kworker/u16:3+efi_rts_wq	19:15:01	2
7134	99	268	0,267	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	22:45:12	1
7135	99	267	0,265	cyclictest	17167	-21	kworker/u16:3+efi_rts_wq	23:25:16	2
7136	99	266	0,265	cyclictest	21360	-21	kworker/u16:2+efi_rts_wq	20:49:26	3
7134	99	266	0,265	cyclictest	17167	-21	kworker/u16:3+efi_rts_wq	00:35:13	1
7135	99	265	0,263	cyclictest	6842	-21	kworker/u16:0+efi_rts_wq	23:45:14	2
7135	99	264	0,263	cyclictest	25802	-21	kworker/u16:3+efi_rts_wq	21:00:14	2
7134	99	264	0,262	cyclictest	6842	-21	kworker/u16:0+efi_rts_wq	00:00:13	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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