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 Tue Jun 30, 2026 12:43:56)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
22616	2	317	303,5	sleep1	0	-21	swapper/1	07:09:47	1
20567	2	317	302,5	sleep3	0	-21	swapper/3	07:05:01	3
22327	2	316	309,4	sleep2	0	-21	swapper/2	07:06:08	2
22295	2	315	302,4	sleep0	0	-21	swapper/0	07:05:41	0
22898	99	299	0,298	cyclictest	2662	-21	kworker/u16:3+efi_rts_wq	11:20:13	2
22896	99	296	0,295	cyclictest	25627	-21	kworker/u16:2+efi_rts_wq	11:07:42	0
22896	99	294	0,293	cyclictest	15253	-21	kworker/u16:1+efi_rts_wq	10:05:12	0
22898	99	292	0,291	cyclictest	7402	-21	kworker/u16:1+efi_rts_wq	09:05:15	2
22898	99	292	0,290	cyclictest	18225	-21	kworker/u16:0+efi_rts_wq	11:55:13	2
22899	99	291	0,290	cyclictest	27059	-21	kworker/u16:2+efi_rts_wq	07:30:12	3
22896	99	291	0,290	cyclictest	419	-21	kworker/u16:2+efi_rts_wq	09:37:25	0
22899	99	290	0,289	cyclictest	5652	-21	kworker/u16:1+efi_rts_wq	08:25:12	3
22899	99	290	0,289	cyclictest	27803	-21	kworker/u16:2+efi_rts_wq	10:15:15	3
22899	99	290	0,289	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	09:40:12	3
22898	99	288	0,287	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	10:57:41	2
22899	99	287	0,286	cyclictest	30371	-21	kworker/u16:0+efi_rts_wq	07:35:13	3
22898	99	287	0,286	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	09:15:13	2
22896	99	287	0,286	cyclictest	27842	-21	kworker/u16:2+efi_rts_wq	12:15:09	0
22896	99	287	0,286	cyclictest	27803	-21	kworker/u16:2+efi_rts_wq	09:55:14	0
22896	99	287	0,285	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	10:50:12	0
22896	99	287	0,285	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	10:50:11	0
22898	99	286	0,285	cyclictest	4497	-21	kworker/u16:1+efi_rts_wq	07:10:13	2
22897	99	286	0,285	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	10:35:12	1
22896	99	286	0,285	cyclictest	12039	-21	kworker/u16:1+efi_rts_wq	11:50:12	0
22898	99	285	0,283	cyclictest	25627	-21	kworker/u16:2+efi_rts_wq	11:05:12	2
22898	99	282	0,281	cyclictest	27803	-21	kworker/u16:2+efi_rts_wq	10:25:13	2
22896	99	282	0,281	cyclictest	9747	-21	kworker/u16:2+efi_rts_wq	11:42:51	0
22899	99	281	0,280	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	10:50:12	3
22899	99	281	0,280	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	10:50:12	3
22897	99	281	0,280	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	09:17:21	1
22899	99	280	0,279	cyclictest	23599	-21	kworker/u16:3+efi_rts_wq	09:50:13	3
22899	99	279	0,278	cyclictest	31859	-21	kworker/u16:1+efi_rts_wq	12:32:59	3
22897	99	279	0,278	cyclictest	5652	-21	kworker/u16:1+efi_rts_wq	08:25:12	1
22896	99	279	0,278	cyclictest	25439	-21	kworker/u16:0+efi_rts_wq	12:35:12	0
22899	99	277	0,276	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	11:15:12	3
22897	99	276	0,275	cyclictest	5652	-21	kworker/u16:1+efi_rts_wq	08:20:13	1
22896	99	275	0,274	cyclictest	27803	-21	kworker/u16:2+efi_rts_wq	10:00:12	0
22896	99	275	0,274	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	09:27:24	0
22897	99	273	0,272	cyclictest	30371	-21	kworker/u16:0+efi_rts_wq	07:20:13	1
22897	99	273	0,272	cyclictest	27842	-21	kworker/u16:2+efi_rts_wq	12:20:13	1
22896	99	271	0,270	cyclictest	27059	-21	kworker/u16:2+efi_rts_wq	07:21:58	0
22898	99	270	0,269	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	10:32:35	2
22897	99	269	0,268	cyclictest	31859	-21	kworker/u16:1+efi_rts_wq	12:30:14	1
22899	99	268	0,264	cyclictest	7402	-21	kworker/u16:1+efi_rts_wq	09:05:15	3
22898	99	267	0,266	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	09:35:13	2
22898	99	265	0,264	cyclictest	2662	-21	kworker/u16:3+efi_rts_wq	11:25:13	2
22899	99	263	0,262	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	11:10:14	3
22899	99	263	0,262	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	10:55:13	3
22896	99	263	0,262	cyclictest	23341	-21	kworker/u16:1+efi_rts_wq	12:10:12	0
22899	99	262	0,261	cyclictest	10968	-21	kworker/u16:0+efi_rts_wq	11:30:14	3
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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