Re: Disable SSE3 features in glibc

[Thawan Kooburat <kthawan at gmail dot com>]

Hi,

It is for my experiment. I understand that glibc check CPU features
via CPUID only once on the first call into any routine. I am doing
some kind of live migration, so the programs generate invalid opcode
error on the target machine because of SSE3.



On Thu, Sep 16, 2010 at 7:09 PM, Matt Turner <mattst88@gmail.com> wrote:
> On Thu, Sep 16, 2010 at 8:06 PM, Thawan Kooburat <kthawan@gmail.com> wrote:
>> Hi,
>>
>> I want to prevent glibc from using its SSE3 routines such as :
>> __strncpy_ssse3 even though the machine supports those features. Is
>> there anyway to do it?
>>
>> Right now I am thinking that I need to recompile glibc. However, I am
>> not sure which configuration flag should I use.
>> I am on a 64-bit machine, but there is only one - - host option
>> (x86_64) unlike the 32-bit host.
>>
>> I found the compilation guide for glibc:
>> http://tldp.org/HOWTO/html_single/Glibc-Install-HOWTO/
>> However, it seems a bit complicated. So I am thinking of using
>> Fedora's glibc source rpm. Hopefully, I can compile and install glibc
>> with a special setup like the method in the link.
>>
>>
>> Please suggest
>>
>>
>> --
>> Thawan Kooburat
>>
>> Graduate Student
>> Department of Computer Science
>> UW-Madison
>
> Are you experiencing a bug caused by the SSE3 routines? Or is there
> some other purpose?
>
> Matt
>



-- 
Thawan Kooburat

Graduate Student
Department of Computer Science
UW-Madison