Date: Tue, 29 Oct 2002 13:31:16 -0800 From: Terry Lambert <tlambert2@mindspring.com> To: Matthew Dillon <dillon@apollo.backplane.com> Cc: Raymond Kohler <raymond.j.kohler@lmco.com>, current@FreeBSD.ORG Subject: Re: questions about the state of current Message-ID: <3DBEFE24.1E9DDB89@mindspring.com> References: <2570443.1035916854787.JavaMail.wshttp@emss03g01.ems.lmco.com> <3DBEF55E.A0F9ED1B@mindspring.com> <200210292106.g9TL6aoc010659@apollo.backplane.com>
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Matthew Dillon wrote: > That said, it should be noted that nearly all the > really cool development projects are only happening in -current. Not by choice... 8-) 8-). > And, of course, there is the fact that computing power seems to > double every year. Since -current's overhead is in large part > due to mutexes and other concurrency mechanisms, and these are > literally pure-cpu mechanisms rather then memory or I/O dependant, > decisions should be based on capability rather then something as > insignificant as a 15% performance difference between the 'rough cut' > -current and the well aged -stable. In coming years concurrency > is going to become the leading performance-improving mechanism > for computers. I agree that "it's to be expected", but the "it doesn't matter" argument is pretty lame. It matters. Coming to FreeBSD the first time, I would definitely make a decision for 4.7 vs. 5.x if performance were an issue for me. I still have not seen a reasonable justification for interrupt threads (for example), except that they are easier to understand and program. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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