NET7.0 use memory，linux > windows，so much~~~~~ more，why

[snltty]

Description

same application

linux working set so large

Configuration

windows x64 linux debian x64

Regression?

Data

Analysis

[huoyaoyuan]

Can you provide some information about your application? For example what it's doing and how it's allocating objects.

[snltty]

Gen 0，Gen 1，Gen 2。no problem，i don't know working set come from，why that need 78MB

[ghost]

This issue has been marked needs-author-action and may be missing some important information.

[MSDN-WhiteKnight]

Is the "Working set" value on Linux a private working set, or includes memory shared with other processes (such as executable images for libraries loaded into multiple processes)? What tool generated this output?

[snltty]

Is the "Working set" value on Linux a private working set, or includes memory shared with other processes (such as executable images for libraries loaded into multiple processes)? What tool generated this output?

dotnet-counters

project /snltty/p2p-tunnel

client/client.service or server/server.service

[danmoseley]

Cc @mangod9

[mangod9]

Hello @snltty, would it be possible to provide a small repro for this? There are several factors which might affect working set, but primarily it would be related to amount of memory and # of cores on the machine/VM. Are both machine configurations similar for windows and linux? Also would be good to know what version of .NET you are using for this validation?

Thanks

[snltty]

Hello @snltty, would it be possible to provide a small repro for this? There are several factors which might affect working set, but primarily it would be related to amount of memory and # of cores on the machine/VM. Are both machine configurations similar for windows and linux? Also would be good to know what version of .NET you are using for this validation?

Thanks

.NET 7.302 windows CPU： i5 8400，Memory：8G 3600 * 2 linux CPU：intel N2840，Memory：4G 1333 linux already set DOTNET_GCName=libclrgc.so

[mangod9]

thanks for the info. Are you observing this with a simple helloworld style application or specifically for your application (would it possible to provide a repro?)

Also with the latest .NET 7 servicing release falling back to .NET 6 GC is no longer required. We have fixed the spurious 64mb of working set issue.

[snltty]

thank you，i will try simple helloworld application

[snltty]

code

windows 3.1MB

linux

[mangod9]

Ok thanks we will take a look. Is the windows number working set or "active private working set" in Task Manager (I notice about 25k working set for a simple HW app on my windows machine). Perhaps you should check with dotnet-counters as well on Windows to ensure you are looking at the same metric.

[snltty]

windows

linux 2 cores 4GB 1333

[mangod9]

@janvorli to check since we recently did some analysis around working set on linux. @snltty, assume you are running the same app on both machines? Your earlier screenshot from few days ago shows working set of 37mb, but the recent one is 84mb -- what is different?

[janvorli]

It seems that windows probably don't include assemblies and shared libraries in the value reported by the taskman. When we did the testing with a simple Web app, the managed assemblies alone consumed about 32 mb, then there were about 10MB from the native libraries of the .NET runtime and 11MB from 3rd party native libraries. The hello world would get somehow smaller numbers.

[snltty]

@mangod9 ， 5day ago，37MB is simple hello world 34MB and 78MB，is my project in Windows and Linux

It seems that the working set used by Linux is always larger than that of Windows，a lot，i don't know why

Perhaps this is the normal situation？

My project just to using