[Openib-windows] DDK to be used

[Leonid Keller]

> -----Original Message-----
> From: ftillier.sst at gmail.com [mailto:ftillier.sst at gmail.com] 
> On Behalf Of Fabian Tillier
> Sent: Sunday, March 19, 2006 5:30 PM
> To: Leonid Keller
> Cc: openib-windows at openib.org
> Subject: Re: [Openib-windows] DDK to be used
> 
> Hi Leonid,
> 
> On 3/19/06, Leonid Keller <leonid at mellanox.co.il> wrote:
> > Hi Fab,
> > We are using Win2003 SP1 DDK (3790.1830) and in the last 
> time, while 
> > preparing a release version for regression, we've come 
> across several 
> > compiler bugs. Usually, they are related to the optimizing of 
> > intrinsic functions.
> > [Examples: _bytes_swap64(expression)

I meant _byteswap_uint64(expression). 
I saw reports on a buggy behaviour of this function on the Internet and
an MS guy, acknowledging that.

> or even InterlockedOr(addr, 0)! ]
> 
> This is the same DDK that I am using, and I don't have any issues. 
> Can you give examples of what the warnings are?

These are not warnings, but compiler bugs.
Here is an example (see in mthca_create_ah() in kernel\mthca_av.c):

	if (!atomic_read(&pd->sqp_count) && 
		 !(dev->mthca_flags & MTHCA_FLAG_DDR_HIDDEN)) 
		branch1
	else
		branch2

The code, built by the compiler, will always enter branch1.
[in my case pd->sqp_count was 4 and it has entered it]


> 
> > What DDK are you using ?
> > Do you have an access to a newer DDK ? Can  we get it ?
> 
> I don't think there's a newer DDK out.  The WDK (Windows 
> Driver Kit) will be out along with Vista, and we'll switch to 
> that when it's released.
> 
> > If - not, what a solution would you suggest ?
> > [We were thinking about using a compiler from VC 8.0. It is 
> of major 
> > version 14 and seems like better.
> > But it comes with its own headers and libs and we will need 
> to somehow 
> > merge two different IDEs, which can cause new problems and 
> use DLLs, 
> > that do not come with OS (like msvcrt80.dll), which complicates 
> > installation.]
> 
> I don't think we want to use the VC8 compiler.  First, it 
> requires getting the DDK build environment to use it rather 
> than its own, second it requires other uses of OpenIB to get 
> Visual Studio, which is not free like the DDK.
> 
> I'm sure we can find a solution to the build warnings, since 
> I have not had any and I build with /W4.

I think, the right solution is to use Vista WDK: they have there
compilers of 14 major version (both x86 and x64).
> 
> - Fab
> 
> 
>