Am 07.06.2012 09:54, schrieb Invisible:

> A more significant problem shows up with my quad-core system. As you
> know, it has 4 execution cores. But it also has hyperthreading, which
> makes Windows pretend that it has 8 cores. But it doesn't. Which means
> that even when all 4 cores are working at maximum capacity, Task Manager
> claims I'm only using 50% CPU. This is terribly misleading...

Claiming that it uses 100% CPU would be misleading as well. After all, 
hyperthreading /does/ add some speed benefit; it pretty much depends on 
your application how much that benefit is: The more cache misses the 
software generates, the higher the HT benefit.

Even technically, HT indeed extends each core by another "half a core".

Post a reply to this message