Date: Thu, 28 May 2009 21:07:46 +0200 (CEST) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: cpghost <cpghost@cordula.ws> Cc: freebsd-questions@freebsd.org Subject: Re: superpages? Message-ID: <alpine.BSF.2.00.0905282107210.61809@wojtek.tensor.gdynia.pl> In-Reply-To: <20090528151738.GC1259@phenom.cordula.ws> References: <alpine.BSF.2.00.0905281447040.60042@wojtek.tensor.gdynia.pl> <20090528151738.GC1259@phenom.cordula.ws>
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> [amd64, i386] The FreeBSD virtual memory subsystem now supports > fully transparent use of superpages for application memory; > application memory pages are dynamically promoted to or demoted from > superpages without any modification to application code. This change > offers the benefit of large page sizes such as improved virtual > memory efficiency and reduced TLB (translation lookaside buffer) > misses without downsides like application changes and virtual memory > inflexibility. This is disabled by default and can be enabled by > setting a loader tunable vm.pmap.pg_ps_enabled to 1. very important change. i will have to check. thank you very much
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