Re: Early SPECWeb99 results on 2.5.33 with TSO on e1000

Nivedita Singhvi
2002-09-13T22:09:00Z

Quoting todd-lkml@osogrande.com:

> dave, all,
>
> not sure i understand what you're proposing, but while we're at it,
> why not also make the api for apps to allocate a buffer in userland
> that (for nics that support it) the nic can dma directly into? it

I believe thats exactly what David was referring to - reverse
direction sendfile() so to speak..

> seems likely notification that the buffer was used would have to
> travel through the kernel, but it would be nice to save the
> interrupts altogether.

However, I dont think what youre saving are interrupts as
much as the extra copy, but I could be wrong..

thanks,
Nivedita