Date: Thu, 04 Jul 2002 17:55:48 -0500 From: Juan E Navarro <jnavarro@cs.rice.edu> To: Yoriaki FUJIMORI <fujimori@prinz.fujimori.cache.waseda.ac.jp> Cc: freebsd-alpha <freebsd-alpha@FreeBSD.org> Subject: Re: linux super page/alpha Message-ID: <3D24D274.B9493391@cs.rice.edu> References: <200206250649.g5P6nwN56776@prinz.fujimori.cache.waseda.ac.jp>
next in thread | previous in thread | raw e-mail | index | archive | help
Yoriaki FUJIMORI wrote: > Dear listers, > I was informed of the existence of the subject matter on > http://shimizu-lab.dt.u-tokai.ac.jp/lsp.html > > This page is written in English. > Is there any similar project on FreeBSD/alpha by somebody? Hi. I've been having fun with superpages for the past several months, and my experimentation platform is precisely FreeBSD/Alpha. The abstract of a recent paper is below. You can find the full paper at the project's web page: http://www.cs.rice.edu/~jnavarro/mitosis Feel free to ask any question you may have. Cheers. -- ++*Juan-- --------------------------------------------------------------- Practical, transparent operating system support for superpages Juan Navarro, Sitaram Iyer, Peter Druschel and Alan Cox. Abstract Most general-purpose processors provide support for memory pages of large sizes, called superpages. Superpages enable each entry in the translation lookaside buffer (TLB) to map a large physical memory region into virtual address space. This dramatically increases TLB coverage, reduces TLB misses, and promises performance improvements for many applications. However, supporting superpages poses several challenges to the operating system, in terms of superpage allocation and promotion tradeoffs, fragmentation control, etc. We analyze these issues, and propose the design of an effective superpage management system. We implement it in FreeBSD on the Alpha CPU, and evaluate it on real workloads and benchmarks. We obtain substantial performance benefits, often exceeding 30%; these benefits are sustained even under stressful workload scenarios. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3D24D274.B9493391>