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
Special All - All RT - Optimization - Ethernet - Thumbnails - Next

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 Sep 05, 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
24221	2	336	311,8	sleep0	0	-21	swapper/0	19:08:50	0
24079	2	318	312,4	sleep3	0	-21	swapper/3	19:07:00	3
23969	2	316	308,5	sleep2	0	-21	swapper/2	19:05:35	2
24003	2	315	302,4	sleep1	0	-21	swapper/1	19:06:02	1
24581	99	305	0,302	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	20:40:13	3
24580	99	300	0,299	cyclictest	3081	-21	kworker/u16:1+efi_rts_wq	23:30:12	2
24577	99	295	0,293	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	23:05:11	0
24577	99	293	0,292	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	21:20:11	0
24581	99	292	0,291	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	21:19:30	3
24581	99	292	0,289	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	21:05:11	3
24581	99	291	0,290	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	22:30:15	3
24579	99	291	0,290	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	22:25:11	1
24579	99	291	0,289	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	23:00:13	1
24580	99	289	0,288	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	22:25:11	2
24577	99	289	0,288	cyclictest	7770	-21	kworker/u16:3+efi_rts_wq	00:15:14	0
24577	99	287	0,286	cyclictest	26603	-21	kworker/u16:1+efi_rts_wq	19:10:11	0
24581	99	285	0,284	cyclictest	3081	-21	kworker/u16:1+efi_rts_wq	23:20:13	3
24577	99	284	0,283	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	19:55:13	0
24577	99	284	0,283	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	19:55:12	0
24579	99	283	0,282	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	20:35:13	1
24579	99	283	0,282	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	20:14:17	1
24577	99	283	0,281	cyclictest	7770	-21	kworker/u16:3+efi_rts_wq	00:00:11	0
24581	99	281	0,280	cyclictest	26603	-21	kworker/u16:1+efi_rts_wq	19:15:14	3
24579	99	281	0,279	cyclictest	7770	-21	kworker/u16:3+efi_rts_wq	23:55:12	1
24579	99	281	0,279	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	00:20:14	1
24577	99	281	0,280	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	19:40:11	0
24579	99	280	0,279	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	22:00:12	1
24581	99	279	0,278	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	20:05:12	3
24577	99	279	0,278	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	00:20:14	0
24577	99	279	0,278	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	23:04:51	0
24581	99	278	0,277	cyclictest	7770	-21	kworker/u16:3+efi_rts_wq	00:26:17	3
24581	99	278	0,277	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	22:50:10	3
24581	99	275	0,274	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	20:30:11	3
24581	99	274	0,273	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	23:45:11	3
24581	99	274	0,273	cyclictest	27164	-21	kworker/u16:2+efi_rts_wq	19:20:13	3
24581	99	273	0,272	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	21:50:11	3
24577	99	273	0,272	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	21:14:28	0
24581	99	272	0,271	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	20:00:13	3
24577	99	272	0,271	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	21:54:37	0
24581	99	271	0,270	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	21:35:13	3
24577	99	271	0,270	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	20:30:10	0
24581	99	270	0,269	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	20:39:21	3
24580	99	270	0,269	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	20:55:13	2
24580	99	269	0,268	cyclictest	3081	-21	kworker/u16:1+efi_rts_wq	23:20:13	2
24579	99	268	0,266	cyclictest	6735	-21	kworker/u16:1+efi_rts_wq	22:35:10	1
24580	99	267	0,266	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	21:10:12	2
24579	99	267	0,266	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	21:09:28	1
24577	99	266	0,265	cyclictest	7770	-21	kworker/u16:3+efi_rts_wq	23:45:12	0
24581	99	264	0,263	cyclictest	22474	-21	kworker/u16:3+efi_rts_wq	19:25:12	3
24579	99	263	0,262	cyclictest	31105	-21	kworker/u16:0+efi_rts_wq	20:45:13	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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