>> -----Original Message----- >> From: users [mailto:[email protected]] On Behalf Of Alex Kiselev >> Sent: Thursday, February 21, 2019 3:33 PM >> To: [email protected] >> Subject: Re: [dpdk-users] build dpdk for a cpu that doesn't support avx
>> It looks like I've found a way: >> I edited $RTE_SDK/config/defconfig_x86_64-native-linuxapp-gcc >> CONFIG_RTE_MACHINE="x86-64" >> and then I used >> make EXTRA_CFLAGS="-march=x86-64 -mpopcnt -mmmx -msse -msse2 -msse3 -mssse3 >> -msse4.1 -msse4.2 -mfpmath=sse -mpopcnt" >> The application has started successfully. >> But I am wondering, maybe I've missed something and there are potential bugs >> in this way? >> > Hi. >> > Is it possible to build DPDK application on a machine that do have AVX >> support >> > for use at another machine that doesn't have AVX feature? >> > Thanks. > Using -march to manually tune should work fine, just be aware of > mistakes made; this is an error prone method.. > As per the GCC docs, you can target specific CPU families, and the optimal > flags will be selected: > https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html > Example: -march=goldmont-plus > With make, EXTRA_CFLAGS="-march=NAME-HERE" should work > With Meson, cd <build_dir> && meson configure -Dc_args="-march=NAME-HERE" > I guess there's a prettier method for meson, but the above works here :) > Hope that helps, -Harry Yes, it helped. Thank you. I've switched to using EXTRA_CFLAGS="-march=westmere" -- Alex
