Low clock speed a challenge for PS4 development too (Project CARS dev)

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zarx said:

Pemalite said:

The CPU clockspeed isn't actually the problem.
It's the IPC or Instructions Per Clock, Jaguar falls flat on it's face in that regard.
For example... Jaguar might be able to execute 1 instruction per mhz, where-as AMD's Trinity might be able to execute 4 instructions per mhz, thus at the same "mhz/ghz" rating, Trinity would be 4x as fast. (This is why the Pentium 4/D fell on it's face.)

But that's to be completely expected.
Console manufacturers haven't taken CPU performance seriously for a long time, it's the graphics that sells the games so they tend to throw everything at Bandwidth and GPU power.
Microsoft and Sony would have actually had far better performance if they wen't with a Trinity/Llano based Quad-Core CPU, but that's a story for another day...

However, the difference between this generation and last generations CPU's is that despite them all being pathetically slow... With this new generation the GPU is going to be taking on some more of the tasks that is traditionally handled by the CPU, this is something that will take time for developers to get used to having to do and play with as really, only PC developers have done anything of the sorts.

The trouble with uing the GPGPU to make up for the weakness of the CPU is that GPGPU is only good at tasks that can be highly parallelized. Which leaves the serialised tasks which the Jaguar CPU is weak at.

Out of curiosity, what kind of tasks are serialised or parallelized?