[lkml]   [2001]   [Feb]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: sendfile+zerocopy: fairly sexy (nothing to do with ECN)

David Lang writes:
> right, assuming that there is enough sendfile() benifit to overcome the
> write() penalty from the stuff that can't be cached or sent from a file.
> my question was basicly are there enough places where sendfile would
> actually be used to make it a net gain.

There are non-performance issues as well (really, all of these points
have been mentioned in this thread btw). One is that since paged
SKBs use only single-order page allocations, the memory allocation
subsystem is stressed less than the current scheme where SLAB
allocates multi-order pages to satisfy allocations of linear SKB data

This has consequences and benefits system wide.

David S. Miller
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:28    [W:0.097 / U:0.356 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site