Re: [Lse-tech] Re: efficient copy_to_user and copy_from_user routines in

[Bill Hartner]

Andrew Morton wrote:
> 
> Mala Anand wrote:
> >
> > Here is a 2.5.19 patch that improves the performance of IA32 copy_to_user
> > and copy_from_user routines used by :
...
> 
> One question:  have you tested on other CPU types?  This problem is
> very specific to Intel hardware.  On AMD, the eight-byte alignement
> artifact does not exist at all.  It could be that your patch is not
> desirable on such CPUs?
> 

In Mala's lab, there are a couple of 1.6 Ghz P4 systems that can be used to test on.

There is also a Netbench (P4 and PIII Xeon) and SPECweb99 (PIII Xeon) setup
that can be used for further testing.

There are some older P6 systems available too.  Not sure about AMD yet.

Bill