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
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.

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 Fri Aug 29, 2025 00:43:29)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
829807	99	191	183,4	cyclictest	938568	-21	kworker/u16:3+events_unbound		3
829794	99	151	143,6	cyclictest	112	-21	kswapd0		0
829794	99	151	140,8	cyclictest	1043681	-21	apt-get		0
829807	99	134	128,4	cyclictest	1035366	-21	kworker/u16:1+events_unbound		3
829794	99	79	71,6	cyclictest	864799	-21	kworker/u16:4+events_unbound		0
829804	99	76	69,5	cyclictest	850483	-21	kworker/u16:2+events_unbound		2
829804	99	74	67,5	cyclictest	864799	-21	kworker/u16:4+events_unbound		2
829818	99	71	67,3	cyclictest	112	-21	kswapd0		7
829807	99	71	63,6	cyclictest	850483	-21	kworker/u16:2+events_unbound		3
829804	99	71	62,7	cyclictest	864799	-21	kworker/u16:4+events_unbound		2
829804	99	70	65,3	cyclictest	980710	-21	kworker/u16:2+events_unbound		2
829804	99	68	60,6	cyclictest	961007	-21	kworker/u16:1+events_unbound		2
829804	99	67	56,8	cyclictest	519	-21	systemd-journal		2
829804	99	66	59,5	cyclictest	917027	-21	kworker/u16:5+events_unbound		2
829804	99	66	57,7	cyclictest	864799	-21	kworker/u16:4+events_unbound		2
829818	99	65	60,4	cyclictest	1049525	-21	ntpq		7
829804	99	65	58,5	cyclictest	1055356	-21	kworker/u16:0+events_unbound		2
829804	99	65	57,6	cyclictest	898330	-21	kworker/u16:1+events_unbound		2
829804	99	65	57,6	cyclictest	898330	-21	kworker/u16:1+events_unbound		2
829807	99	64	56,6	cyclictest	1044374	-21	kworker/u16:5+events_unbound		3
829804	99	64	57,5	cyclictest	961007	-21	kworker/u16:1+events_unbound		2
829804	99	63	55,6	cyclictest	836519	-21	kworker/u16:2+events_unbound		2
829804	99	63	54,7	cyclictest	961007	-21	kworker/u16:1+events_unbound		2
829804	99	62	54,6	cyclictest	867126	-21	kworker/u16:1+events_unbound		2
829807	99	61	53,6	cyclictest	956364	-21	kworker/u16:0+events_unbound		3
829807	99	61	52,6	cyclictest	834810	-21	kworker/u16:1+flush-179:0		3
829804	99	61	54,5	cyclictest	961007	-21	kworker/u16:1+events_unbound		2
829804	99	61	54,5	cyclictest	839900	-21	kworker/u16:4+events_unbound		2
829801	99	61	53,6	cyclictest	961007	-21	kworker/u16:1+events_unbound		1
829801	99	61	51,7	cyclictest	519	-21	systemd-journal		1
829804	99	60	52,6	cyclictest	1044374	-21	kworker/u16:5+events_unbound		2
829794	99	60	51,7	cyclictest	980710	-21	kworker/u16:2+events_unbound		0
829804	99	59	52,5	cyclictest	867126	-21	kworker/u16:1+events_unbound		2
829804	99	59	52,5	cyclictest	864799	-21	kworker/u16:4+events_unbound		2
829807	99	58	50,6	cyclictest	898330	-21	kworker/u16:1+events_unbound		3
829804	99	58	51,5	cyclictest	917027	-21	kworker/u16:5+events_unbound		2
829804	99	58	51,5	cyclictest	871748	-21	kworker/u16:3+events_unbound		2
829804	99	58	49,7	cyclictest	956364	-21	kworker/u16:0+events_unbound		2
829801	99	58	48,7	cyclictest	1035366	-21	kworker/u16:1+events_unbound		1
829804	99	57	50,5	cyclictest	898330	-21	kworker/u16:1+events_unbound		2
829804	99	57	49,6	cyclictest	938568	-21	kworker/u16:3+events_unbound		2
829804	99	57	49,6	cyclictest	1006826	-21	kworker/u16:4+events_unbound		2
829804	99	56	49,5	cyclictest	980710	-21	kworker/u16:2+events_unbound		2
829804	99	56	49,5	cyclictest	856945	-21	kworker/u16:3+events_unbound		2
829804	99	56	49,5	cyclictest	856945	-21	kworker/u16:3+events_unbound		2
829804	99	56	48,6	cyclictest	871748	-21	kworker/u16:3+events_unbound		2
829804	99	56	47,6	cyclictest	898330	-21	kworker/u16:1+events_unbound		2
829794	99	56	46,7	cyclictest	917027	-21	kworker/u16:5+flush-179:32		0
829807	99	55	46,7	cyclictest	980710	-21	kworker/u16:2+flush-179:0		3
829804	99	55	47,6	cyclictest	961007	-21	kworker/u16:1+events_unbound		2
829804	99	55	47,6	cyclictest	850483	-21	kworker/u16:2+events_unbound		2
829804	99	54	47,5	cyclictest	961007	-21	kworker/u16:1+events_unbound		2
829804	99	54	46,6	cyclictest	980710	-21	kworker/u16:2+events_unbound		2
829794	99	54	46,6	cyclictest	893319	-21	kworker/u16:0+flush-179:0		0
829804	99	53	45,6	cyclictest	850483	-21	kworker/u16:2+events_unbound		2
829804	99	53	45,6	cyclictest	1006826	-21	kworker/u16:4+events_unbound		2
829794	99	53	45,6	cyclictest	956364	-21	kworker/u16:0+events_unbound		0
829813	99	52	48,3	cyclictest	938568	-21	kworker/u16:3+flush-179:0		5
829807	99	52	44,6	cyclictest	898330	-21	kworker/u16:1+flush-179:0		3
829807	99	52	44,6	cyclictest	1006826	-21	kworker/u16:4+flush-179:0		3
829807	99	52	43,7	cyclictest	956364	-21	kworker/u16:0+events_unbound		3
829804	99	52	45,5	cyclictest	980710	-21	kworker/u16:2+events_unbound		2
829804	99	52	44,6	cyclictest	898330	-21	kworker/u16:1+events_unbound		2
829794	99	52	40,9	cyclictest	519	-21	systemd-journal		0
829807	99	51	43,6	cyclictest	956364	-21	kworker/u16:0+events_unbound		3
829807	99	51	43,6	cyclictest	850483	-21	kworker/u16:2+events_unbound		3
829804	99	51	43,6	cyclictest	980710	-21	kworker/u16:2+events_unbound		2
829801	99	51	43,6	cyclictest	1051502	-21	kworker/u16:3+events_unbound		1
829794	99	51	41,7	cyclictest	980710	-21	kworker/u16:2+flush-179:32		0
829808	99	50	47,2	cyclictest	1032978	-21	ntpq		4
829807	99	50	42,6	cyclictest	956364	-21	kworker/u16:0+flush-179:0		3
829804	99	50	42,6	cyclictest	956364	-21	kworker/u16:0+events_unbound		2
829804	99	50	42,6	cyclictest	871748	-21	kworker/u16:3+events_unbound		2
829804	99	50	42,5	cyclictest	938568	-21	kworker/u16:3+events_unbound		2
829807	99	49	41,6	cyclictest	938568	-21	kworker/u16:3+events_unbound		3
829807	99	49	41,5	cyclictest	898330	-21	kworker/u16:1+events_unbound		3
829794	99	49	41,6	cyclictest	917027	-21	kworker/u16:5+events_unbound		0
829807	99	48	38,7	cyclictest	864799	-21	kworker/u16:4+flush-179:0		3
829804	99	48	40,6	cyclictest	961007	-21	kworker/u16:1+events_unbound		2
829804	99	48	40,5	cyclictest	1030815	-21	kworker/u16:3+events_unbound		2
829804	99	47	40,5	cyclictest	871748	-21	kworker/u16:3+events_unbound		2
829804	99	47	39,5	cyclictest	868861	-21	kworker/u16:0+events_unbound		2
829794	99	47	39,6	cyclictest	1051502	-21	kworker/u16:3+flush-179:0		0
829807	99	46	39,5	cyclictest	893319	-21	kworker/u16:0+events_unbound		3
829807	99	46	37,7	cyclictest	938568	-21	kworker/u16:3+events_unbound		3
829801	99	46	38,6	cyclictest	898330	-21	kworker/u16:1+events_unbound		1
829801	99	46	38,6	cyclictest	850483	-21	kworker/u16:2+events_unbound		1
829801	99	46	35,8	cyclictest	1044583	-21	cat		1
829794	99	46	39,5	cyclictest	917027	-21	kworker/u16:5+events_unbound		0
829807	99	45	37,6	cyclictest	850483	-21	kworker/u16:2+flush-179:32		3
829807	99	45	35,7	cyclictest	980710	-21	kworker/u16:2+flush-179:0		3
829804	99	45	38,5	cyclictest	834810	-21	kworker/u16:1+events_unbound		2
829794	99	45	40,3	cyclictest	850483	-21	kworker/u16:2+flush-179:32		0
829794	99	45	37,6	cyclictest	1055356	-21	kworker/u16:0+events_unbound		0
829794	99	45	36,6	cyclictest	850483	-21	kworker/u16:2+events_unbound		0
829807	99	44	37,5	cyclictest	898330	-21	kworker/u16:1+flush-179:0		3
829807	99	44	37,5	cyclictest	834810	-21	kworker/u16:1+events_unbound		3
829807	99	44	36,6	cyclictest	917027	-21	kworker/u16:5+flush-179:0		3
829807	99	44	36,6	cyclictest	893319	-21	kworker/u16:0+flush-179:0		3
829801	99	44	36,6	cyclictest	980710	-21	kworker/u16:2+events_unbound		1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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