feat: integrate system and graphics performance optimizations into bootstrap

Author: dolfbarr

dot_bashrc

@@ -15,6 +15,9 @@ export PATH
 export EDITOR="micro"
 export VISUAL="zed --wait"
 
+# NVIDIA shader disk cache size (10GB) to prevent shader compile stutters
+export __GL_SHADER_DISK_CACHE_SIZE=10737418240
+
 # Uncomment the following line if you don't like systemctl's auto-paging feature:
 # export SYSTEMD_PAGER=
 

dot_sysctl.d/99-gaming-performance.conf

@@ -12,6 +12,7 @@ kernel.split_lock_mitigate=0
 # Optimize ZRAM Swapping
 vm.swappiness=180
 vm.page-cluster=0
+vm.watermark_boost_factor=0
 
 # Prevent writeback-induced stuttering during heavy I/O
 vm.dirty_background_bytes=268435456

dot_zshrc.tmpl

@@ -39,6 +39,9 @@ export MANPAGER="sh -c 'col -bx | bat -l man -p'"
 # Scrollbar behavior: force GTK scrollbars to be always visible (no overlay scrolling)
 export GTK_OVERLAY_SCROLLING=0
 
+# NVIDIA shader disk cache size (10GB) to prevent shader compile stutters
+export __GL_SHADER_DISK_CACHE_SIZE=10737418240
+
 # PATH
 export PATH="$PATH:$HOME/bin"
 export PATH="$HOME/.npm-global/bin:$PATH"

run_once_setup_fedora.sh

@@ -531,6 +531,19 @@ $SUI_SUDO systemctl disable --now quiet-cpu.service 2>/dev/null || true
 $SUI_SUDO rm -f /etc/systemd/system/quiet-cpu.service
 $SUI_SUDO systemctl daemon-reload
 
+# Disable conflicting performance timers and micro-stutter culprits
+$SUI_SUDO systemctl disable --now dnf-makecache.timer 2>/dev/null || true
+$SUI_SUDO systemctl disable --now irqbalance 2>/dev/null || true
+
+# Set kernel argument split_lock_detect=off to prevent performance throttling
+$SUI_SUDO grubby --update-kernel=ALL --args="split_lock_detect=off" 2>/dev/null || true
+
+# Enable CachyOS Copr repository and install extensible sched-ext schedulers
+echo "Configuring sched-ext low-latency CPU scheduler..."
+$SUI_SUDO dnf copr enable -y bieszczaders/kernel-cachyos-addons 2>/dev/null || true
+$SUI_SUDO dnf install -y scx-scheds scx-tools 2>/dev/null || true
+$SUI_SUDO systemctl enable --now scx_loader 2>/dev/null || true
+
 # Yubikey Smartcard Daemon & U2F UX
 $SUI_SUDO systemctl enable --now pcscd.socket 2>/dev/null || true