2GB Memory Limit

[Larry Rix]

Is Eiffel subject to a 2GB memory limit? If so, is there a way around it? Is it Eiffel that is limited or is it something else?

[Hubert Cater]

Hi Larry,

I discovered a problem with my compiled 32 bit EXEs running on a Windows 64 OS, in that apparently by default, a 32Bit application can only use 2GB of memory.  I was able to work around this by setting the LARGEADDRESSAWARE flag for my EXE and that allowed it to go above the 2 GB memory limit.

I used the Microsoft Visual Studio 'editbin' tool to set this flag on the EXE after compilation.

https://msdn.microsoft.com/en-us/library/d25ddyfc.aspx

What would be great, is if I was able to apply this flag to a 'frozen' EXE so that I could have it also applied when testing in Workbench mode.  I'm sure this could be done but I haven't actually investigated how to do this.  I'm guessing a simple way to implement a C compilcation flag in Eiffelstudio?

A workaround could be to apply it to the frozen EXE itself but then you'd have to do this everytime you re-freeze your code.

Not sure if this relates to your issue, but I thought I'd throw it out there just in case,

Hubert

On Mon, Jun 11, 2018 at 10:27 AM, Larry Rix <lar...@moonshotsoftware.com> wrote:

Is Eiffel subject to a 2GB memory limit? If so, is there a way around it? Is it Eiffel that is limited or is it something else?

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[Anders Persson]

If you compile to 32 bit it is probably the adressable memory that is the limitation.

Den mån 11 juni 2018 16:27Larry Rix <lar...@moonshotsoftware.com> skrev:

Is Eiffel subject to a 2GB memory limit? If so, is there a way around it? Is it Eiffel that is limited or is it something else?

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[Emmanuel Stapf]

It is easy to pass the linker flag “/LARGEADDRESSAWARE” to allow the 3GB memory addressing. Go to the project settings and under Advanced->Externals choose `Add linker flag` and enter the above flag. However, 32-bit Windows are pretty rare those days and it is recommended to compile in 64-bit mode instead.

 

Manu

 

From: eiffel...@googlegroups.com <eiffel...@googlegroups.com> On Behalf Of Hubert Cater
Sent: Monday, June 11, 2018 08:29
To: Eiffel Users <eiffel...@googlegroups.com>
Subject: Re: [eiffel-users] 2GB Memory Limit

 

Hi Larry,

 

I discovered a problem with my compiled 32 bit EXEs running on a Windows 64 OS, in that apparently by default, a 32Bit application can only use 2GB of memory.  I was able to work around this by setting the LARGEADDRESSAWARE flag for my EXE and that allowed it to go above the 2 GB memory limit.

 

I used the Microsoft Visual Studio 'editbin' tool to set this flag on the EXE after compilation.

 

https://msdn.microsoft.com/en-us/library/d25ddyfc.aspx

 

What would be great, is if I was able to apply this flag to a 'frozen' EXE so that I could have it also applied when testing in Workbench mode.  I'm sure this could be done but I haven't actually investigated how to do this.  I'm guessing a simple way to implement a C compilcation flag in Eiffelstudio?

 

A workaround could be to apply it to the frozen EXE itself but then you'd have to do this everytime you re-freeze your code.

 

Not sure if this relates to your issue, but I thought I'd throw it out there just in case,

Hubert

 

On Mon, Jun 11, 2018 at 10:27 AM, Larry Rix <lar...@moonshotsoftware.com> wrote:

Is Eiffel subject to a 2GB memory limit? If so, is there a way around it? Is it Eiffel that is limited or is it something else?

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[Hubert Cater]

Thanks Manu, this is helpful indeed as I was not able to add a linker flag in the older version of Eiffelstudio I was running so was unaware that this had now become an option with the latest version.   Great stuff :)

Hubert

On Mon, Jun 11, 2018 at 11:07 PM, Emmanuel Stapf <ma...@eiffel.com> wrote:

It is easy to pass the linker flag “/LARGEADDRESSAWARE” to allow the 3GB memory addressing. Go to the project settings and under Advanced->Externals choose `Add linker flag` and enter the above flag. However, 32-bit Windows are pretty rare those days and it is recommended to compile in 64-bit mode instead.

 

Manu

 

From: eiffel...@googlegroups.com <eiffel...@googlegroups.com> On Behalf Of Hubert Cater
Sent: Monday, June 11, 2018 08:29
To: Eiffel Users <eiffel...@googlegroups.com>
Subject: Re: [eiffel-users] 2GB Memory Limit

 

Hi Larry,

 

I discovered a problem with my compiled 32 bit EXEs running on a Windows 64 OS, in that apparently by default, a 32Bit application can only use 2GB of memory.  I was able to work around this by setting the LARGEADDRESSAWARE flag for my EXE and that allowed it to go above the 2 GB memory limit.

 

I used the Microsoft Visual Studio 'editbin' tool to set this flag on the EXE after compilation.

 

https://msdn.microsoft.com/en-us/library/d25ddyfc.aspx

 

What would be great, is if I was able to apply this flag to a 'frozen' EXE so that I could have it also applied when testing in Workbench mode.  I'm sure this could be done but I haven't actually investigated how to do this.  I'm guessing a simple way to implement a C compilcation flag in Eiffelstudio?

 

A workaround could be to apply it to the frozen EXE itself but then you'd have to do this everytime you re-freeze your code.

 

Not sure if this relates to your issue, but I thought I'd throw it out there just in case,

Hubert

 

On Mon, Jun 11, 2018 at 10:27 AM, Larry Rix <lar...@moonshotsoftware.com> wrote:

Is Eiffel subject to a 2GB memory limit? If so, is there a way around it? Is it Eiffel that is limited or is it something else?

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[Hubert Cater]

Hi Manu,

When I try and add the linker flag as described above, I receive the following error:

Fatal error LNK1181: cannot open input file '\LARGEADDRESSAWARE.obj'

I'm unfortunately bound to 32-bits at the moment due to using a 32-bit custom 3D library for my project.

Hubert

On Mon, Jun 11, 2018 at 11:07 PM, Emmanuel Stapf <ma...@eiffel.com> wrote:

It is easy to pass the linker flag “/LARGEADDRESSAWARE” to allow the 3GB memory addressing. Go to the project settings and under Advanced->Externals choose `Add linker flag` and enter the above flag. However, 32-bit Windows are pretty rare those days and it is recommended to compile in 64-bit mode instead.

 

Manu

 

From: eiffel...@googlegroups.com <eiffel...@googlegroups.com> On Behalf Of Hubert Cater
Sent: Monday, June 11, 2018 08:29
To: Eiffel Users <eiffel...@googlegroups.com>
Subject: Re: [eiffel-users] 2GB Memory Limit

 

Hi Larry,

 

I discovered a problem with my compiled 32 bit EXEs running on a Windows 64 OS, in that apparently by default, a 32Bit application can only use 2GB of memory.  I was able to work around this by setting the LARGEADDRESSAWARE flag for my EXE and that allowed it to go above the 2 GB memory limit.

 

I used the Microsoft Visual Studio 'editbin' tool to set this flag on the EXE after compilation.

 

https://msdn.microsoft.com/en-us/library/d25ddyfc.aspx

 

What would be great, is if I was able to apply this flag to a 'frozen' EXE so that I could have it also applied when testing in Workbench mode.  I'm sure this could be done but I haven't actually investigated how to do this.  I'm guessing a simple way to implement a C compilcation flag in Eiffelstudio?

 

A workaround could be to apply it to the frozen EXE itself but then you'd have to do this everytime you re-freeze your code.

 

Not sure if this relates to your issue, but I thought I'd throw it out there just in case,

Hubert

 

On Mon, Jun 11, 2018 at 10:27 AM, Larry Rix <lar...@moonshotsoftware.com> wrote:

Is Eiffel subject to a 2GB memory limit? If so, is there a way around it? Is it Eiffel that is limited or is it something else?

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[r...@amalasoft.com]

Hi Hubert

 

Just checked in 18.01, and when you go the Advanced-Externals section, if you right-click on the "Externals" item, you will get the popup to allow you to add a linker flag.  Is that what you tried?

R 

 

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[Hubert Cater]

Yes, thank you and I did try this and in the 'value' field used \LARGEADDRESSAWARE as suggested, yet the c compilation error result is that it cannot find '\LARGEADDRESSAWARE.obj'. 

[r...@amalasoft.com]

Hu Hubert

Very interesting!  I just added a flag that way, and I check the .ecf file to see what changed, and it looked just fine BUT, then I tried to freeze the project and, sure enough, the linker flag magically morphed into "bozo.obj".

Nice find!

 

R 

 

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[Hubert Cater]

Great and good to know I wasn't missing the obvious and hopefully this can be easily corrected as I for one will find it useful going forward.

[Peter Gummer]

Hi Hubert,

That should be /LARGEADDRESSAWARE, as Manu recommended: forward slash, not backslash.

Peter

[Hubert Cater]

Hi Peter,

That was a typo in my response, using the forward slash is what produced that particular error from C compilation in Eiffelstudio 18.01.

Hubert

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[Emmanuel Stapf]

Use -LARGEADDRESSAWARE instead.

 

Manu

 

From: eiffel...@googlegroups.com <eiffel...@googlegroups.com> On Behalf Of Hubert Cater

[Hubert Cater]

Thanks Manu, that seems to have done the job :)

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