On Monday 18 February 2002 07:54 pm, Peter Wemm wrote:
> Mike Silbersack wrote:
> > On Mon, 18 Feb 2002, Hiten Pandya wrote:
> > > hi all,
> > >
> > > As to conclude this thread (for me.), I have come to the decision of
> > > actually starting a project for making a BSD Licensed in-kernel HTTPd
> > > server.  The project will be on SourceForge.net.
> > >
> > > As you all know, that when starting a project, a name is needed for
> > > project; I completely out of ideas, and I have literally no creative
> > > skills. :)
> >
> > If you want to be really useful, I have a better first step for you. :)
> >
> > Common wisdom seems to be that Apache is slow, other httpds are faster,
> > custom ones are fastest.  However, I don't think I've actually seen any
> > comparisons since this one of thttpd vs others:
> >
> > http://www.acme.com/software/thttpd/benchmarks.html
> >
> > Before starting work on a kernel httpd, you might wish to run similar
> > benchmarks (with perhaps only 5 different httpds) to see what the current
> > performance of FreeBSD is; it may turn out that some limitation in the
> > TCP stack is hit even by userland httpds, and your effort would be better
> > spent on fixing that first.
>
> The problem is that our threads implementation sucks.  The moment that
> thttpd has to do an actual disk read on freebsd, the whole thing comes to a
> screeching halt.
>
> Threaded http servers do not stand up to real-world loads on freebsd,
> unless there are very specially constructred scenarios in place.. ie:
> everything is in ram, no FS calls ever block, etc.
>
> Cheers,
> -Peter


I don't suppose it matters much than thttpd isn't threaded.  It's a 
non-blocking server that uses it's own abstraction layer over 
select/poll/kevent called fdevent.  It also maintains an mmap'd cache
of frequently accessed files.

Sam

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