On 02/01/25 at 12:53, Istvan Toth wrote:
amd 5700G cpu
If you are new to kernel compiling maybe you don't know that you can
optimize the kernel for your specific CPU architecture, if you are using
the GCC compiler:
first make a backup copy of the Makefile:
$ cd linux-source-6.1
$ cp arch/x86/Makefile arch/x86/Makefile.backup
then edit "arch/x86/Makefile":
$ cd linux-source-6.1
$ vi arch/x86/Makefile
at line 152 change:
cflags-$(CONFIG_MK8) += -march=k8
to
cflags-$(CONFIG_MK8) += -march=znver3
and below at line 159 change
rustflags-$(CONFIG_MK8) += -Ctarget-cpu=k8
to
rustflags-$(CONFIG_MK8) += -Ctarget-cpu=znver3
save and exit vim. "znver3" is the GCC's switch for the µarch of your GPU.
Clean the old kernel build with:
$ make -j16 clean
then with the Kernel configuration tool, I use:
$ make -j16 menuconfig
in: "Processor type and features --->"
in: "Processor family"
choose: "Opteron/Athlon64/Hammer/K8"
then select "Exit" and "Save" the kernel configuration.
To build the kernel I use the command:
$ time make -s -j16 bindeb-pkg
This command generates Linux-image and Linux-header packages (.deb) that
can be installed with "dpkg -i" command.
Be aware that objtool command may not support the "znver3" GCC's switch,
showing you "warning ..." during the Kernel compilation process, in that
circumstance you can try other GCC switch: "znver2" or "znver1".
If also that fail, restore the "Makefile" file using the backup copy.
Just my 2¢ tips, cheers.
--
Franco Martelli
