OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, slot #4

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.

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 100 highest latencies:

System rackaslot4s.osadl.org (updated Mon Sep 29, 2025 00:43:30)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2170280	99	87	80,5	cyclictest	2200739	-21	kworker/u16:3+events_unbound		2
2170280	99	75	66,7	cyclictest	2171878	-21	kworker/u16:1+events_unbound		2
2170276	99	75	67,6	cyclictest	2348028	-21	kworker/u16:0+flush-179:0		1
2170276	99	75	67,6	cyclictest	2200739	-21	kworker/u16:3+flush-179:0		1
2170280	99	74	66,6	cyclictest	2401993	-21	kworker/u16:3+events_unbound		2
2170280	99	74	66,6	cyclictest	2292686	-21	kworker/u16:0+events_unbound		2
2170276	99	70	62,6	cyclictest	2292686	-21	kworker/u16:0+flush-179:0		1
2170280	99	69	62,5	cyclictest	2348028	-21	kworker/u16:0+events_unbound		2
2170280	99	67	58,7	cyclictest	2287069	-21	kworker/u16:1+events_unbound		2
2170271	99	67	60,5	cyclictest	2200739	-21	kworker/u16:3+events_unbound		0
2170271	99	66	58,6	cyclictest	2200739	-21	kworker/u16:3+events_unbound		0
2170280	99	65	58,5	cyclictest	2178711	-21	kworker/u16:2+events_unbound		2
2170276	99	65	56,7	cyclictest	2204237	-21	kworker/u16:4+events_unbound		1
2170276	99	65	56,6	cyclictest	2379810	-21	kworker/u16:2+flush-179:0		1
2170271	99	65	57,6	cyclictest	2287069	-21	kworker/u16:1+events_unbound		0
2170271	99	65	55,7	cyclictest	519	-21	systemd-journal		0
2170280	99	64	57,5	cyclictest	2292686	-21	kworker/u16:0+events_unbound		2
2170280	99	64	56,6	cyclictest	2292686	-21	kworker/u16:0+events_unbound		2
2170276	99	64	56,6	cyclictest	2200739	-21	kworker/u16:3+events_unbound		1
2170276	99	64	55,7	cyclictest	2192311	-21	kworker/u16:1+events_unbound		1
2170280	99	63	55,6	cyclictest	2204237	-21	kworker/u16:4+events_unbound		2
2170276	99	63	55,6	cyclictest	2244017	-21	kworker/u16:2+flush-179:0		1
2170280	99	62	54,6	cyclictest	2204237	-21	kworker/u16:4+events_unbound		2
2170280	99	61	53,6	cyclictest	2200739	-21	kworker/u16:3+events_unbound		2
2170280	99	61	52,7	cyclictest	2197434	-21	kworker/u16:4+events_unbound		2
2170276	99	61	53,6	cyclictest	2379810	-21	kworker/u16:2+events_unbound		1
2170280	99	60	52,6	cyclictest	2211043	-21	kworker/u16:1+flush-179:0		2
2170276	99	60	52,6	cyclictest	2401993	-21	kworker/u16:3+flush-179:0		1
2170276	99	60	52,6	cyclictest	2302651	-21	kworker/u16:2+flush-179:0		1
2170280	99	59	52,5	cyclictest	2244017	-21	kworker/u16:2+events_unbound		2
2170280	99	59	51,6	cyclictest	2348028	-21	kworker/u16:0+events_unbound		2
2170280	99	59	51,6	cyclictest	2314119	-21	kworker/u16:3+events_unbound		2
2170280	99	59	49,7	cyclictest	2379810	-21	kworker/u16:2+flush-179:0		2
2170276	99	59	51,6	cyclictest	2211043	-21	kworker/u16:1+flush-179:0		1
2170271	99	59	52,5	cyclictest	2287069	-21	kworker/u16:1+events_unbound		0
2170280	99	58	51,5	cyclictest	2379810	-21	kworker/u16:2+events_unbound		2
2170280	99	58	51,5	cyclictest	2200739	-21	kworker/u16:3+events_unbound		2
2170280	99	58	50,6	cyclictest	2287069	-21	kworker/u16:1+flush-179:0		2
2170280	99	58	50,6	cyclictest	2220939	-21	kworker/u16:0+events_unbound		2
2170280	99	58	50,6	cyclictest	2220939	-21	kworker/u16:0+events_unbound		2
2170280	99	58	50,6	cyclictest	2211043	-21	kworker/u16:1+events_unbound		2
2170276	99	58	50,6	cyclictest	2348028	-21	kworker/u16:0+events_unbound		1
2170271	99	58	50,6	cyclictest	2200739	-21	kworker/u16:3+events_unbound		0
2170280	99	57	50,5	cyclictest	2340300	-21	kworker/u16:4+events_unbound		2
2170280	99	57	48,7	cyclictest	2185495	-21	kworker/u16:1+events_unbound		2
2170271	99	57	50,5	cyclictest	2204237	-21	kworker/u16:4+events_unbound		0
2170280	99	56	48,6	cyclictest	2401993	-21	kworker/u16:3+events_unbound		2
2170280	99	56	48,6	cyclictest	2204237	-21	kworker/u16:4+flush-179:32		2
2170276	99	56	49,5	cyclictest	2340300	-21	kworker/u16:4+events_unbound		1
2170276	99	56	47,7	cyclictest	2204237	-21	kworker/u16:4+events_unbound		1
2170276	99	56	47,7	cyclictest	2204237	-21	kworker/u16:4+events_unbound		1
2170276	99	56	46,7	cyclictest	519	-21	systemd-journal		1
2170280	99	55	47,6	cyclictest	2200739	-21	kworker/u16:3+events_unbound		2
2170280	99	54	47,5	cyclictest	2211043	-21	kworker/u16:1+flush-179:32		2
2170280	99	54	46,6	cyclictest	2314119	-21	kworker/u16:3+events_unbound		2
2170276	99	54	46,6	cyclictest	2348028	-21	kworker/u16:0+events_unbound		1
2170276	99	54	46,6	cyclictest	2287069	-21	kworker/u16:1+events_unbound		1
2170280	99	53	45,6	cyclictest	2200739	-21	kworker/u16:3+events_unbound		2
2170280	99	53	43,8	cyclictest	2167392	-21	kworker/u16:3+events_unbound		2
2170276	99	53	45,6	cyclictest	2287069	-21	kworker/u16:1+events_unbound		1
2170276	99	53	42,8	cyclictest	2184116	-21	cat		1
2170276	99	53	42,8	cyclictest	2184116	-21	cat		1
2170280	99	52	45,5	cyclictest	2204237	-21	kworker/u16:4+flush-179:32		2
2170280	99	52	43,7	cyclictest	2287069	-21	kworker/u16:1+events_unbound		2
2170276	99	52	44,6	cyclictest	2204237	-21	kworker/u16:4+flush-179:0		1
2170276	99	52	42,7	cyclictest	2302651	-21	kworker/u16:2+flush-179:0		1
2170280	99	51	44,5	cyclictest	2340300	-21	kworker/u16:4+events_unbound		2
2170280	99	51	43,6	cyclictest	2340300	-21	kworker/u16:4+events_unbound		2
2170276	99	51	44,5	cyclictest	2244017	-21	kworker/u16:2+flush-179:0		1
2170276	99	51	44,5	cyclictest	2211043	-21	kworker/u16:1+events_unbound		1
2170276	99	51	43,6	cyclictest	2314119	-21	kworker/u16:3+events_unbound		1
2170276	99	51	43,6	cyclictest	2204237	-21	kworker/u16:4+flush-179:0		1
2170271	99	51	44,5	cyclictest	2314119	-21	kworker/u16:3+events_unbound		0
2170271	99	51	44,5	cyclictest	2287069	-21	kworker/u16:1+events_unbound		0
2170280	99	50	43,5	cyclictest	2204237	-21	kworker/u16:4+events_unbound		2
2170276	99	50	42,6	cyclictest	2287069	-21	kworker/u16:1+events_unbound		1
2170287	99	49	39,7	cyclictest	2314119	-21	kworker/u16:3+events_unbound		3
2170280	99	49	42,5	cyclictest	2265033	-21	kworker/u16:0+events_unbound		2
2170280	99	49	42,5	cyclictest	2208640	-21	kworker/u16:2+events_unbound		2
2170280	99	49	41,6	cyclictest	2348028	-21	kworker/u16:0+events_unbound		2
2170276	99	49	42,5	cyclictest	2183798	-21	kworker/u16:4+events_unbound		1
2170271	99	49	42,5	cyclictest	2244017	-21	kworker/u16:2+events_unbound		0
2170276	99	48	37,8	cyclictest	2268345	-21	cat		1
2170287	99	47	36,8	cyclictest	2386394	-21	sh		3
2170280	99	47	40,5	cyclictest	2340300	-21	kworker/u16:4+events_unbound		2
2170280	99	47	39,6	cyclictest	2348028	-21	kworker/u16:0+events_unbound		2
2170280	99	47	39,6	cyclictest	2178711	-21	kworker/u16:2+flush-179:0		2
2170280	99	47	39,6	cyclictest	2167392	-21	kworker/u16:3+flush-179:0		2
2170280	99	47	39,6	cyclictest	2167392	-21	kworker/u16:3+flush-179:0		2
2170276	99	47	40,5	cyclictest	2204237	-21	kworker/u16:4+events_unbound		1
2170276	99	47	39,6	cyclictest	2287069	-21	kworker/u16:1+flush-179:0		1
2170276	99	47	37,7	cyclictest	2292686	-21	kworker/u16:0+flush-179:0		1
2170271	99	47	40,5	cyclictest	2204237	-21	kworker/u16:4+events_unbound		0
2170271	99	47	39,6	cyclictest	2287069	-21	kworker/u16:1+events_unbound		0
2170280	99	46	39,5	cyclictest	2392214	-21	kworker/u16:3+events_unbound		2
2170280	99	46	39,5	cyclictest	2238160	-21	kworker/u16:0+events_unbound		2
2170280	99	46	38,6	cyclictest	2211043	-21	kworker/u16:1+flush-179:0		2
2170276	99	46	38,6	cyclictest	2302651	-21	kworker/u16:2+events_unbound		1
2170276	99	46	38,6	cyclictest	2287069	-21	kworker/u16:1+events_unbound		1
2170280	99	45	38,5	cyclictest	2244017	-21	kworker/u16:2+events_unbound		2
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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