linux kernal benchmark

test.sh

#!/bin/bash

set -e

# === SETTINGS ===
REPO_URL="https://github.com/torvalds/linux.git"
WORKDIR="$HOME/kernel-benchmark-github"
SRC_DIR="$WORKDIR/linux"
CORES=$(nproc)

# === FUNCTIONS ===

install_dependencies() {
    echo "🔧 Installing build dependencies..."
    sudo apt update
    sudo apt install -y build-essential libncurses-dev bison flex libssl-dev libelf-dev bc git curl wget
}

clone_or_update_repo() {
    mkdir -p "$WORKDIR"
    cd "$WORKDIR"

    if [ -d "$SRC_DIR/.git" ]; then
        echo "📦 Updating existing Linux kernel repo..."
        cd "$SRC_DIR"
        git pull --depth=1 origin master
    else
        echo "📥 Cloning Linux kernel from GitHub..."
        git clone --depth=1 "$REPO_URL"
        cd "$SRC_DIR"
    fi
}

build_kernel() {
    echo "⚙️ Preparing kernel config..."
    if [ -f /boot/config-$(uname -r) ]; then
        cp /boot/config-$(uname -r) .config
        yes "" | make olddefconfig
    else
        make defconfig
    fi

    echo "🚀 Starting kernel compilation using $CORES cores..."
    START=$(date +%s)
    make -j"$CORES"
    END=$(date +%s)
    DURATION=$((END - START))

    echo "✅ Kernel compiled in $DURATION seconds."
}

# === MAIN ===

echo "🧠 Detected $CORES CPU cores."
install_dependencies
clone_or_update_repo
build_kernel