5 ms·
sounds to me like a perverse realisation of amd's apu ideal, treating VRAM like system RAM, although in this case they are still disparate memory spaces.
by kebolio 10y ago
sounds to me like a perverse realisation of amd's apu ideal, treating VRAM like system RAM, although in this case they are still disparate memory spaces.
- mtgx 10y agoIsn't VRAM already used as system RAM in the AMD-based PS4?
- scandinavian 10y agoPS4 has 8 GB of unified memory yes. The Xbox 360 had 512 GB of unified memory too.
- jevinskie 10y agoIndeed. You could also use the PS3's VRAM as swap space when using OtherOS (Linux) before Sony removed OtherOS. GPU malware is going to become really interesting once memory-coherent GPUs (like PS4's APU) become more available. That combined with something like packet mmap [1] may allow for data exfiltration from a GPU compute kernel without ongoing userspace assistance (MMIO packet send/recv => no need to have the CPU userspace side dispatch syscalls on behalf of the GPU). [1]: https://www.kernel.org/doc/Documentation/networking/packet_mmap.txt https://www.kernel.org/doc/Documentation/networking/packet_m...