Re: [dpdk-dev] How to set RTE_MACHINE on DPDK 1.7.0 correctly?

["Richardson, Bruce" <bruce.richardson@intel.com>]

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Suryanathan P
> Sent: Wednesday, July 23, 2014 10:28 AM
> To: dev@dpdk.org
> Subject: [dpdk-dev] How to set RTE_MACHINE on DPDK 1.7.0 correctly?
> 
> Hi,
> 
> I am trying to compile the test-pmd app on an Intel Core i7 targeted to run
> on Intel Atom target.
> 
> When I run test pmd binary on the target machine, it fails to start with:
> 
> ERROR: This system does not support "AVX".
> Please check that RTE_MACHINE is set correctly.
> 
> This is how I am building dpdk:
> 
> RTE_MAHCHINE=atm
> export RTE_MACHINE
> 
> make install T=x86_64-native-linuxapp-gcc
> 
> Since this didn't work, I copied
> 
> cp config/defconfig_x86_64-native-linuxapp-gcc to
> config/defconfig_x86_64-atm-linuxapp-gcc
> 
> and changed:
> 
> CONFIG_RTE_MACHINE="atm"
> 
> Followed by build:
> make install T=x86_64-atm-linuxapp-gcc
> 
> This failed when compiling:
> == Build lib/librte_pmd_ixgbe
> .
> .
> CC ixgbe_rxtx_vec.o
> In file included from
> /home/sp/dpdk/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c:41:0:
> /usr/lib/gcc/x86_64-linux-gnu/4.6/include/nmmintrin.h:31:3: error: #error
> "SSE4.2 instruction set not enabled"
> /home/sp/dpdk/lib/librte_pmd_ixgbe/ixgbe_rxtx_vec.c: In function
> 'ixgbe_recv_pkts_vec'
> 
> Any help is appreciated.
> 
> Thanks.
> Suryanathan

To compile for the atom target you probably need to turn off the ACL library and set the "INC_VECTOR" setting for IXGBE to "n" to disable the components which require SSE4.2.

/Bruce