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Date:      Wed, 21 Jun 2000 12:18:54 -0700
From:      Alfred Perlstein <bright@wintelcom.net>
To:        Paul Saab <paul@mu.org>
Cc:        arch@FreeBSD.ORG
Subject:   Re: MORE: Re: kblob discussion.
Message-ID:  <20000621121854.W17420@fw.wintelcom.net>
In-Reply-To: <20000620123206.A56823@elvis.mu.org>; from paul@mu.org on Tue, Jun 20, 2000 at 12:32:06PM -0700
References:  <20000619111309.E26801@fw.wintelcom.net> <xzpk8fktu2x.fsf@flood.ping.uio.no> <20000620093526.Q17420@fw.wintelcom.net> <20000620123206.A56823@elvis.mu.org>

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* Paul Saab <paul@mu.org> [000620 12:34] wrote:
> > 
> > Sendfile's vm tricks and additional overhead per-page sized chunks
> > make it unsuitable for sending smaller chunks of data.  Paul Saab
> > noticed that for some workloads it was actually slower than just
> > copying the data while working at Hotmail.
> 
> I was talking with dg last week and we may have found a flaw in the way
> that I measured the speed.  I am fairly convinced now that sendfile is
> the prefered way to send data from a file.

Can you elaborate on that?  You're saying kblob is not necessary?

How was the sendfile testing flawed?

-Alfred


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