Re: [dpdk-dev] compile dpdk with no avx

["De Lara Guarch, Pablo" <pablo.de.lara.guarch@intel.com>]

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Masaru Oki
> Sent: Wednesday, November 12, 2014 1:48 PM
> To: Yaron Illouz
> Cc: <dev@dpdk.org>
> Subject: Re: [dpdk-dev] compile dpdk with no avx
> 
> Hi,
> 
> Some libraries need AVX instruction, but if you don't use, it can disable.
>   e.g. CONFIG_RTE_LIBRTE_IXGBE_PMD=n in config file.
> 
> 
> 2014-11-12 21:45 GMT+09:00 Yaron Illouz <yaroni@radcom.com>:
> > Hi
> >
> >
> >
> > I use dpdk in my product. I can't change my dpdk version.
> >
> > I compile it on a server that have avx.
> >
> > Most of the time, it run on machine that have avx, but not always.
> >
> >
> >
> > When running the product on a machine with no avx, it crash on illegal
> > instruction.
> >
> > The current solution is to build it on a computer with no avx.
> >
> >
> >
> > Is there a compilation flag to disable avx? So it doesn't matter on
> > which computer I compiled it.

Basically, you are looking at cross-compiling DPDK. One thing you could do
 is go to one of the config files (i.e. defconfig_x86-64-native-linuxapp-gcc) 
and change CONFIG_RTE_MACHINE, from "native" to one of the
 micro-architectures that do not have avx, such as "wsm" (Westmere).

Regards,
Pablo

> >
> >
> >
> > Compile flag
> >
> > defconfig_x86_64-default-linuxapp-gcc
> >
> >
> >
> > Dpdk version
> >
> > PACKAGE_VERSION_MAJOR_NUMBER=1
> >
> > PACKAGE_VERSION_MINOR_NUMBER=6
> >
> > PACKAGE_VERSION_PATCH_NUMBER=0
> >
> > PACKAGE_VERSION_BUILD_NUMBER=18
> >
> >
> >
> > Gcc version
> >
> > gcc (GCC) 4.4.6 20120305 (Red Hat 4.4.6-4)
> >
> >
> >
> > OS
> >
> > CentOS release 6.3 (Final)
> >
> >
> >
> >
> >
> >
> >
> >
> >