site_archiver@lists.apple.com Delivered-To: darwin-kernel@lists.apple.com On 26 Jul 2006, at 22:21, Quinn wrote: Jonas _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.a... Also, for maximum effectiveness, you should ensure that your disk I/ Os are to a page aligned buffer, at a page aligned offset with the file, and are an even multiple of a page in length. A similar question just popped up on perfoptimization-dev. If Microsoft and Adobe aren't filing bugs over this, it might nevertheless be interesting for some Apple engineers evaluate the way the cache flushing daemon (update) behaves, since it's apparently killing performance for various apps (possibly including things like Entourage, which I think should not require something like F_NOCACHE for its mail database). See http://lists.apple.com/archives/perfoptimization-dev/2006/Jul/ msg00047.html and follow-ups, in particular http://lists.apple.com/ archives/perfoptimization-dev/2006/Jul/msg00056.html and http:// lists.apple.com/archives/perfoptimization-dev/2006/Jul/msg00057.html This email sent to site_archiver@lists.apple.com