search

notaz / pcsx_rearmed

ARM optimized PCSX fork
GNU General Public License v2.0
409 stars 212 forks source link

Performance Differences #346

Open mikhaelcool7 opened 2 months ago

mikhaelcool7 commented 2 months ago

PCSX-ReARMed Version

r24l 237887e

Your device

Miyoo Mini Plus

Operating System of your device

Linux (or Linux-based like RetroPie etc.)

CPU architecture

ARM 32bit

Issue description

Drastically worse performance using https://github.com/notaz/pcsx_rearmed/releases/download/libretro-devbuild/pcsx_rearmed_libretro_arm32_miyoo.zip than https://github.com/notaz/pcsx_rearmed/releases/download/libretro-devbuild/pcsx_rearmed_libretro_arm32_classic_armv7_a7.zip on the Miyoo Mini Plus. The Miyoo build also has Downsampling by default which breaks textures in some games. Disabling the feature, halves the performance. Using the regular A7 build does not have any of these issues and runs better or as expected. Running MinUI 20240924-2.

Step-by-step reproduction and logs

No response

notaz commented 2 months ago

Well Miyoo support was added in ad32ae1720d53421222038f25c0d4a344aacb371 by @jSTE0 as an ARM9 device. ARM9 is pretty ancient CPU without NEON and can't use many optimizations of this emulator, so they are disabled in that build.

Maybe it's for some old version of the device? Is there a list of all Miyoo devices and CPUs they have? I've tried a quick search but couldn't find it.

jSTE0 commented 2 months ago

Miyoo is a brand that rebadges all sort of devices. In this context, Miyoo refers to the devices supported by TriForceX/MiyooCFW and includes BittBoy, PocketGo, PowKiddy V90-Q90-Q20, all powered by the Allwinner F1C100s which has an ARM926EJ-S CPU. The Miyoo Mini, including the Plus (which AIUI has a larger screen), uses a Sigmastar SSD202D which has a dual-core Cortex-A7 so it should use the ARMv7 build.