Date: Sat, 25 Apr 1998 16:02:26 -0500 From: Karl Denninger <karl@mcs.net> To: "John S. Dyson" <toor@dyson.iquest.net> Cc: Bill Trost <trost@cloud.rain.com>, current@FreeBSD.ORG Subject: Re: Bandwidth throttling etc. Message-ID: <19980425160226.17154@mcs.net> In-Reply-To: <199804252056.PAA12181@dyson.iquest.net>; from John S. Dyson on Sat, Apr 25, 1998 at 03:56:16PM -0500 References: <908.893476488@cloud.rain.com> <199804252056.PAA12181@dyson.iquest.net>
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On Sat, Apr 25, 1998 at 03:56:16PM -0500, John S. Dyson wrote: > > Garrett Wollman writes: > > What you Really Want is for each interface to manage its own > > allocations. When you want to send a packet, you ask the interface > > for a buffer, and it gives you one of an appropriate size and shape > > that it knows how to transmit efficiently..... > > > > A lot of the work is not actually difficult, just tedious.... > > > > Before anyone spends oodles of time doing this sort of work, has anyone > > taken the radical (-: step of actually profiling the current network > > stack(s) to see where the time is being eaten? Improving the memory > > access behavior may not gain very much, especially if the performance > > hits occur in, say, the IP checksum computation (as a random example). > > > > Maybe someone has already looked at this and this is just rehashing old > > news, but it just struck me that some hard data would be an important > > guide. > > > AFAIK, and I am NOT a networking export, we need to improve the sockets > layer as much as the lower level networking code. > > John Where do you believe there are deficiencies in the socket layer at present? I *HAVE* done some work in there (for our own proprietary stuff) and might be able to make some improvements. I haven't noticed any particularly "evil" behavior of late, and as such haven't spent time on this. -- -- Karl Denninger (karl@MCS.Net)| MCSNet - Serving Chicagoland and Wisconsin http://www.mcs.net/ | T1's from $600 monthly / All Lines K56Flex/DOV | NEW! Corporate ISDN Prices dropped by up to 50%! Voice: [+1 312 803-MCS1 x219]| EXCLUSIVE NEW FEATURE ON ALL PERSONAL ACCOUNTS Fax: [+1 312 803-4929] | *SPAMBLOCK* Technology now included at no cost To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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