Arch Linux User Repository

This package have several variables to enable/disable features.

##
## The following variables can be customized at build time. Use env or export to change at your wish
##
##   Example: env _microarchitecture=98 use_numa=n use_tracers=n makepkg -sc
##
## Look inside 'choose-gcc-optimization.sh' to choose your microarchitecture
## Valid numbers between: 0 to 99
## Default is: 0 => generic
## Good option if your package is for one machine: 98 (Intel native) or 99 (AMD native)
if [ -z ${_microarchitecture+x} ]; then
  _microarchitecture=0
fi

## Disable NUMA since most users do not have multiple processors. Breaks CUDA/NvEnc.
## Archlinux and Xanmod enable it by default.
## Set variable "use_numa" to: n to disable (possibly increase performance)
##                             y to enable  (stock default)
if [ -z ${use_numa+x} ]; then
  use_numa=y
fi

## Since upstream disabled CONFIG_STACK_TRACER (limits debugging and analyzing of the kernel)
## you can enable them setting this option. Caution, because they have an impact in performance.
## Stock Archlinux has this enabled. 
## Set variable "use_tracers" to: n to disable (possibly increase performance, XanMod default)
##                                y to enable  (Archlinux default)
if [ -z ${use_tracers+x} ]; then
  use_tracers=n
fi

# Unique compiler supported upstream is GCC
## Choose between GCC and CLANG config (default is GCC)
## Use the environment variable "_compiler=clang"
if [ "${_compiler}" = "clang" ]; then
  _compiler_flags="CC=clang HOSTCC=clang LLVM=1 LLVM_IAS=1"
fi

# Choose between the 4 main configs for stable branch. Default x86-64-v1 which use CONFIG_GENERIC_CPU2:
# Possible values: config_x86-64-v1 (default) / config_x86-64-v2 / config_x86-64-v3 / config_x86-64-v4
# This will be overwritten by selecting any option in microarchitecture script
# Source files: https://github.com/xanmod/linux/tree/5.17/CONFIGS/xanmod/gcc
if [ -z ${_config+x} ]; then
  _config=config_x86-64-v1
fi

# Compress modules with ZSTD (to save disk space)
if [ -z ${_compress_modules+x} ]; then
  _compress_modules=n
fi

# Compile ONLY used modules to VASTLY reduce the number of modules built
# and the build time.
#
# To keep track of which modules are needed for your specific system/hardware,
# give module_db script a try: https://aur.archlinux.org/packages/modprobed-db
# This PKGBUILD read the database kept if it exists
#
# More at this wiki page ---> https://wiki.archlinux.org/index.php/Modprobed-db
if [ -z ${_localmodcfg} ]; then
  _localmodcfg=n
fi

# Tweak kernel options prior to a build via nconfig
if [ -z ${_makenconfig} ]; then
  _makenconfig=n
fi

Personally I'm running now xanmod kernel compiled with this:

env _microarchitecture=98 use_tracers=n use_numa=n _localmodcfg=y _compress_modules=y makepkg -sic

Also, you can now create the file myconfig in your local repo to build this package with a custom config or use ${XDG_CONFIG_HOME}/linux-xanmod/myconfig. This file can be a full kernel config or be a script with several entries to add/remove options (you have several examples in PKGBUILD by using scripts/config):

Code involved:

  for _myconfig in "${SRCDEST}/myconfig" "${HOME}/.config/linux-xanmod/myconfig" "${XDG_CONFIG_HOME}/linux-xanmod/myconfig" ; do
    if [ -f "${_myconfig}" ] && [ "$(wc -l <"${_myconfig}")" -gt "0" ]; then
      if grep -q 'scripts/config' "${_myconfig}"; then
        # myconfig is a partial file. Executing as a script
        msg2 "Applying myconfig..."
        bash -x "${_myconfig}"
      else
        # myconfig is a full config file. Replacing default .config
        msg2 "Using user CUSTOM config..."
        cp -f "${_myconfig}" .config
      fi
      echo
      break
    fi
  done

Enable eBPF i'm a xanmod kernel user and currently, as the eBPF is disabled, i'm unable to run applications which depend on it such as dae and ananicy-cpp, xanmod has good performance as compared to zen and i'm thinking of reverting to xanmod, as the creator is reluctant to do it due to some "Performance Issues", i think that to add better compatibility, eBPF should be enabled

@Riedler flex and bison are in base-devel, which is an implicit make dependency of all AUR packages.

please add flex and bison to the build dependencies, it needed those to build on my machine at least

@night-crawler thank you. I saw your post in github, glad to see it's not a bug.

@figue in case someone else needs it, add this to cmdline: amd_pstate=passive.

@night-crawler then, please, ask upstream: https://github.com/xanmod/linux/issues

@figue I tried this kernel, result is the same:

analyzing CPU 5:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 5
  CPUs which need to have their frequency coordinated by software: 5
  maximum transition latency:  Cannot determine or is not supported.
  hardware limits: 1.20 GHz - 4.68 GHz
  available frequency steps:  3.30 GHz, 1.30 GHz, 1.20 GHz
  available cpufreq governors: conservative ondemand userspace powersave performance schedutil
  current policy: frequency should be within 1.20 GHz and 3.30 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 2.76 GHz (asserted by call to kernel)
  boost state support:
    Supported: yes
    Active: no

@night-crawler I'm not sure, because I don't have an AMD cpu. Can you try to install and boot the binary xanmod and try again?

https://aur.archlinux.org/packages/linux-xanmod-linux-bin-x64v3

With the linux-xanmod kernel (and starting from about 6, after migrating from linux-xanmod-edge), I have a problem with AMD p-state (ASUS Zephyrus G14 GA401QM).

Linux pik 6.2.8-zen3-xanmod1-1 #1 SMP PREEMPT_DYNAMIC Sun, 26 Mar 2023 11:03:44 +0000 x86_64 GNU/Linux

cpupower frequency-info

analyzing CPU 2:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 2
  CPUs which need to have their frequency coordinated by software: 2
  maximum transition latency:  Cannot determine or is not supported.
  hardware limits: 1.20 GHz - 4.68 GHz
  available frequency steps:  3.30 GHz, 1.30 GHz, 1.20 GHz
  available cpufreq governors: conservative ondemand userspace powersave performance schedutil
  current policy: frequency should be within 1.20 GHz and 3.30 GHz.
                  The governor "powersave" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 1.20 GHz (asserted by call to kernel)
  boost state support:
    Supported: yes
    Active: no

And the same output for the old linux-xanmod-edge:

Linux pik 6.0.5-zen3-xanmod1-1 #1 SMP PREEMPT_DYNAMIC Mon, 07 Nov 2022 17:39:08 +0000 x86_64 GNU/Linux

cpupower frequency-info

analyzing CPU 10:
  driver: amd-pstate
  CPUs which run at the same hardware frequency: 10
  CPUs which need to have their frequency coordinated by software: 10
  maximum transition latency: 131 us
  hardware limits: 400 MHz - 4.68 GHz
  available cpufreq governors: conservative ondemand userspace powersave performance schedutil
  current policy: frequency should be within 400 MHz and 4.68 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 3.34 GHz (asserted by call to kernel)
  boost state support:
    Supported: yes
    Active: yes
    AMD PSTATE Highest Performance: 166. Maximum Frequency: 4.68 GHz.
    AMD PSTATE Nominal Performance: 117. Nominal Frequency: 3.30 GHz.
    AMD PSTATE Lowest Non-linear Performance: 39. Lowest Non-linear Frequency: 1.10 GHz.
    AMD PSTATE Lowest Performance: 15. Lowest Frequency: 400 MHz.

Both kernels are compiled with these flags:

export _microarchitecture=15
export MAKEFLAGS="-j$(nproc)"
export use_tracers=n
# export _compiler=clang
export _compiler=gcc
export use_numa=y
export _compress_modules=n
export _localmodcfg=n

How can I enable p-state for the current xanmod kernel?

@ishitatsuyuki thank you, I'll follow your suggestion and set by default to no, as XanMod has it disabled (arch still has it enabled). I hope all is fine (at least in my system). Can you validate too?