cp /usr/share/lfs-pro-tweaker/profiles/hpc-compute.profile ~/my-custom.profile lfs-pro-tweaker --apply-profile ~/my-custom.profile Optimization without measurement is guesswork. LFS Pro Tweaker 7D includes a benchmark helper:
lfs-pro-tweaker --version # Output: LFS Pro Tweaker 7D (commit abc123) 3.1 Compiler Flags (CFLAGS/CXXFLAGS) LFS Pro Tweaker rewrites /etc/lfs-pro-tweaker.conf which is sourced by custom build scripts. Example aggressive optimization for Intel Skylake-X :
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lfs-pro-tweaker --apply-profile hpc-compute To customize, copy a profile and edit: lfs pro tweaker 7d
lfs-pro-tweaker --list-backups # 2026-04-18-103522 - before profile hpc-compute # 2026-04-17-221001 - before profile desktop-lowlatency lfs-pro-tweaker --restore 2026-04-18-103522
lfs-pro-tweaker --benchmark quick # 2 minutes: sysbench CPU + memory + fileio lfs-pro-tweaker --benchmark full # 20 minutes: adds netperf, iperf3, fio Example output (Intel i9-13900K, DDR5, PCIe 5.0 NVMe):
echo performance | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor echo 0 | tee /proc/sys/kernel/sched_autogroup_enabled # Disable autogroups for low latency introduces a systemd service lpt-cpufreq.service to reapply governor after resume from suspend. 3.5 I/O Scheduler per Device For each block device (excluding rotational disks), 7D sets: cp /usr/share/lfs-pro-tweaker/profiles/hpc-compute
| Profile | Target Use Case | Aggressiveness | |-----------------------|--------------------------------------|----------------| | desktop-lowlatency | Audio production, gaming | High on IO, med on CPU | | server-throughput | Web servers, file servers | High on network, low on power | | powersave-laptop | Battery life, thermal limits | Conservative CPU/IO | | hpc-compute | Scientific computing, rendering | Extreme, NUMA-aware | | embedded-router | Low RAM, flash storage | Minimal services, async IO | | generic-stock | Safe fallback (no changes) | None |
Select a profile:
# VM tuning vm.dirty_ratio = 30 vm.dirty_background_ratio = 5 vm.vfs_cache_pressure = 50 vm.swappiness = 10 net.core.rmem_max = 134217728 net.core.wmem_max = 134217728 net.ipv4.tcp_rmem = 4096 87380 134217728 net.ipv4.tcp_wmem = 4096 65536 134217728 Generic compilation flags
: Includes vm.stat_interval = 10 and kernel.numa_balancing = 0 for dedicated NUMA systems. 3.3 Filesystem Mount Options LFS Pro Tweaker suggests and applies optimized fstab entries:
By [Author Name] — Published: April 18, 2026 Introduction Building a Linux system from scratch using Linux From Scratch (LFS) is an achievement in itself. But once the system boots and the basic userland is functional, the real work begins: optimization . Generic compilation flags, default kernel configurations, and out-of-the-box system settings rarely unlock the full potential of your hardware.