H. Peter Anvin wrote:
> Timothy Miller wrote:
>
>>If your program is capable of handling an address with more than 32
>>bits, what point is there giving a hint? Either your program can handle
>>64-bit pointers or it cannot. Any program flexible enough to handle
>>either size dynamically would expend enough overhead checking that it
>>would be worse than if it just made a hard choice.
>>
>
>
> The purpose is that there is a slight task-switching speed advantage if
> the address is in the bottom 4 GB. Since this affects every process,
> and most processes use very little TLS, this is worthwhile.
>
> This is fundamentally due to a K8 design flaw.
Is there an explicit check somewhere for this? Are the page tables laid
out differently?
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This archive was generated by hypermail 2b29 : Thu May 15 2003 - 22:00:32 EST