Some mmap observations compared to Linux 2.6/OpenBSD

[Vivek Pai]

Before we proceed on this, I'd like to ask is there actuall a committer
ready to follow up on this? We currently make our patches available on
Ping's homepage, and they're relatively clean. He spent a fair bit of
time getting it from a relatively ugly set of changes to something more
elegant and better integrated with the rest of the kernel. However, even
with the benchmark success that we've gotten (which Aniruddha Bohra
mentioned in a different e-mail), we haven't had a single nibble from a
committer. FreeBSD lags Linux badly on the SpecWeb99 benchmarks, and
those are probably more representative than some arbitrary
microbenchmark. It would be nice to get some respectable numbers on it,
especially if we could do it with a stable user-space server.

-Vivek

Mike Silbersack wrote:
> On Sun, 26 Oct 2003 vivek at CS.Princeton.EDU wrote:
> 
> 
>>Details about what we have so far are at
>>http://www.cs.princeton.edu/~yruan/debox/
>>
>>Yaoping Ruan had mentioned this on the list before (and sent a
>>pointer to the sendfile patches), but didn't seem to get much
>>response.
>>
>>-Vivek
> 
> 
> As always, you're seeing the lack of available committer time, not a real
> lack of interest.  One way to accelerate the process might be for someone
> (not necessarily you, any reader of this mailing list could do it) to show
> that this change visibly benefits some easy to run benchmark.  Some simple
> setup of apachebench vs thttpd (which uses sendfile, afaik) would be
> useful for this purpose.
> 
> Mike "Silby" Silbersack
>