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 Jun 27, 2026 12:43:55)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
14002	2	337	313,22	sleep3	0	-21	swapper/3	07:08:05	3
12313	2	324	318,4	sleep1	0	-21	swapper/1	07:05:07	1
14128	2	318	304,5	sleep0	0	-21	swapper/0	07:09:42	0
13961	2	318	310,5	sleep2	0	-21	swapper/2	07:07:32	2
14419	99	304	0,301	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	09:25:14	3
14417	99	304	0,301	cyclictest	2329	-21	kworker/u16:1+efi_rts_wq	10:50:14	1
14419	99	299	0,298	cyclictest	26158	-21	kworker/u16:3+efi_rts_wq	07:35:14	3
14419	99	298	0,297	cyclictest	5162	-21	kworker/u16:2+efi_rts_wq	12:30:15	3
14418	99	298	0,297	cyclictest	5162	-21	kworker/u16:2+efi_rts_wq	12:05:13	2
14417	99	298	0,297	cyclictest	7601	-21	kworker/u16:3+efi_rts_wq	12:10:13	1
14416	99	298	0,297	cyclictest	4826	-21	kworker/u16:0+efi_rts_wq	11:20:14	0
14416	99	298	0,297	cyclictest	4826	-21	kworker/u16:0+efi_rts_wq	11:13:12	0
14416	99	298	0,297	cyclictest	26158	-21	kworker/u16:3+efi_rts_wq	07:32:29	0
14417	99	296	0,295	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	07:20:12	1
14416	99	296	0,294	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	08:55:11	0
14416	99	295	0,294	cyclictest	7601	-21	kworker/u16:3+efi_rts_wq	12:13:21	0
14416	99	294	0,293	cyclictest	4826	-21	kworker/u16:0+efi_rts_wq	11:30:14	0
14416	99	294	0,293	cyclictest	26158	-21	kworker/u16:3+efi_rts_wq	09:32:53	0
14416	99	294	0,293	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	09:05:13	0
14416	99	294	0,292	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	09:57:57	0
14418	99	292	0,291	cyclictest	7601	-21	kworker/u16:3+efi_rts_wq	12:03:20	2
14418	99	291	0,290	cyclictest	21611	-21	kworker/u16:2+efi_rts_wq	11:15:12	2
14417	99	291	0,290	cyclictest	2329	-21	kworker/u16:1+efi_rts_wq	10:40:13	1
14416	99	291	0,290	cyclictest	5162	-21	kworker/u16:2+efi_rts_wq	12:28:25	0
14418	99	287	0,286	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	09:40:12	2
14418	99	287	0,284	cyclictest	26158	-21	kworker/u16:3+efi_rts_wq	10:25:14	2
14419	99	286	0,285	cyclictest	7601	-21	kworker/u16:3+efi_rts_wq	12:20:12	3
14417	99	286	0,285	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	07:47:32	1
14417	99	284	0,283	cyclictest	26158	-21	kworker/u16:3+efi_rts_wq	07:35:14	1
14416	99	284	0,283	cyclictest	4826	-21	kworker/u16:0+efi_rts_wq	10:55:14	0
14419	99	283	0,282	cyclictest	2329	-21	kworker/u16:1+efi_rts_wq	10:30:13	3
14416	99	283	0,282	cyclictest	26158	-21	kworker/u16:3+efi_rts_wq	07:17:26	0
14416	99	283	0,281	cyclictest	4826	-21	kworker/u16:0+efi_rts_wq	11:35:13	0
14419	99	282	0,281	cyclictest	26158	-21	kworker/u16:3+efi_rts_wq	07:27:28	3
14419	99	282	0,281	cyclictest	14013	-21	kworker/u16:3+efi_rts_wq	11:05:13	3
14417	99	282	0,281	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	10:05:13	1
14417	99	280	0,279	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	08:47:44	1
14416	99	279	0,278	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	08:05:12	0
14417	99	278	0,277	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	08:50:14	1
14416	99	278	0,277	cyclictest	26158	-21	kworker/u16:3+efi_rts_wq	07:55:13	0
14419	99	277	0,276	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	07:45:13	3
14416	99	277	0,276	cyclictest	26158	-21	kworker/u16:3+efi_rts_wq	07:25:12	0
14419	99	276	0,275	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	07:57:34	3
14416	99	276	0,275	cyclictest	4826	-21	kworker/u16:0+efi_rts_wq	11:08:12	0
14419	99	274	0,273	cyclictest	5162	-21	kworker/u16:2+efi_rts_wq	12:15:13	3
14417	99	274	0,273	cyclictest	30206	-21	kworker/u16:2+efi_rts_wq	10:30:12	1
14417	99	274	0,272	cyclictest	14013	-21	kworker/u16:3+efi_rts_wq	11:00:14	1
14416	99	274	0,273	cyclictest	5162	-21	kworker/u16:2+efi_rts_wq	11:50:11	0
14417	99	272	0,271	cyclictest	26158	-21	kworker/u16:3+efi_rts_wq	08:15:14	1
14419	99	270	0,269	cyclictest	20461	-21	kworker/u16:0+efi_rts_wq	10:20:12	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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