Don Fry wrote:
The patch below moves the init_block out of the private struct and
only allocates init block with pci_alloc_consistent.
This has two effects:
1. Performance increase for non cache coherent machines, because the
CPU only data in the private struct are now cached
2. locks are
On Wed, Mar 07, 2007 at 12:15:26PM -0800, Michael K. Edwards wrote:
> cacheability of the allocated block. Maybe it doesn't. The alpha
> version of pci_alloc_consistent, on the other hand, does interesting
> things to make the memory visible to PCI. Don, what arches did you
> have in mind when y
On 3/7/07, Ralf Baechle <[EMAIL PROTECTED]> wrote:
GFP_* flags have no influence on caching or prefetching.
The zone modifier flags (like GFP_DMA) can in principle affect the
cache/prefetch policy, since they affect what physical address range
the memory is allocated from. I don't know whether
On Wed, Mar 07, 2007 at 08:35:30AM -0800, Michael K. Edwards wrote:
> >Price question: why would this patch make a difference under VMware? :-)
>
> Moving the struct pcnet32_private from the GFP_DMA32 init_block to the
> GFP_KERNEL netdev allocation may be a win even on systems where
> GFP_DMA32
On 3/6/07, Ralf Baechle <[EMAIL PROTECTED]> wrote:
Price question: why would this patch make a difference under VMware? :-)
Moving the struct pcnet32_private from the GFP_DMA32 init_block to the
GFP_KERNEL netdev allocation may be a win even on systems where
GFP_DMA32 is normally cached, becaus
On Tue, Mar 06, 2007 at 07:39:21PM -0800, Michael K. Edwards wrote:
> On 3/6/07, Ralf Baechle <[EMAIL PROTECTED]> wrote:
> >This small change btw. delivers about ~ 3% extra performance on a very
> >slow test system.
>
> Has this change been tested / benchmarked under VMWare? pcnet32 is
> the (def
On Tue, Mar 06, 2007 at 07:39:21PM -0800, Michael K. Edwards wrote:
> On 3/6/07, Ralf Baechle <[EMAIL PROTECTED]> wrote:
> >This small change btw. delivers about ~ 3% extra performance on a very
> >slow test system.
>
> Has this change been tested / benchmarked under VMWare? pcnet32 is
> the (de
On 3/6/07, Ralf Baechle <[EMAIL PROTECTED]> wrote:
This small change btw. delivers about ~ 3% extra performance on a very
slow test system.
Has this change been tested / benchmarked under VMWare? pcnet32 is
the (default?) virtual device presented by VMWare Workstation, and
that's probably a la
On Tue, Mar 06, 2007 at 10:45:23AM -0800, Don Fry wrote:
> The patch below moves the init_block out of the private struct and
> only allocates init block with pci_alloc_consistent.
>
> This has two effects:
>
> 1. Performance increase for non cache coherent machines, because the
>CPU only d
The patch below moves the init_block out of the private struct and
only allocates init block with pci_alloc_consistent.
This has two effects:
1. Performance increase for non cache coherent machines, because the
CPU only data in the private struct are now cached
2. locks are working now for p
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