Douglas Teles ca8c91f589 Fix Flycast and sysctl after deep research validation ...

Flycast-SA:
- Restore -Ofast sed (was incorrectly replaced with CMAKE_BUILD_TYPE=Release)
- -Ofast = -O3 + -ffast-math is INTENTIONAL for Flycast: the Dreamcast SH4
  FPU doesn't use strict IEEE 754, and the hardware itself flushes denormals
- Validated by JELOS/AmberELEC/ROCKNIX upstream for years without issues
- On weak Cortex-A35, the extra optimization from -ffast-math is meaningful

Sysctl:
- vm.dirty_writeback_centisecs: 500→1500 (match ROCKNIX, reduce I/O wakeups
  during gaming — read-heavy workload needs fewer writeback checks)
- vm.vfs_cache_pressure: 50→100 (restore kernel default — during gameplay
  the same few files are reread (ROM, save, shader cache), so a large
  inode/dentry cache provides no benefit on 1GB RAM. 50 is a desktop tuning
  that favors metadata cache for build/compile workloads, not gaming.
  Note: 200+ is what aggressively reclaims metadata; 100 is the neutral
  kernel default, not an override.)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-18 15:32:03 -03:00

..

ArchR

Fix Flycast and sysctl after deep research validation

2026-04-18 15:32:03 -03:00

ROCKNIX/packages

systemd: reduce default service stop timeout to 5s

2026-04-17 16:45:58 -03:00