Date: Thu, 14 Oct 2010 15:22:22 -0500 From: Mark Tinguely <marktinguely@gmail.com> To: "freebsd-arm@FreeBSD.org" <freebsd-arm@freebsd.org> Subject: Request for test: Concurrent l1 allocated Message-ID: <4CB7667E.2090401@gmail.com>
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There are about 35 static l1 page tables allocated per 64MB of RAM. I was curious how many of the static allocated level 1 page tables are really being used in a real environment. I would appreciate it if the following patch was compiled into your next kernel: http://www.tinguelys.info/mark/freebsd/pmapInUse.diff The amount of RAM that you have and environment (embedded, mini-server, etc) would help. The results can be gathered with the command: $ sysctl vm.pmap.pmap_l1u vm.pmap.pmap_l1s vm.pmap.pmap_l1m vm.pmap.pmap_l1u is the total number of level 1 page tables allocated since rebooting. vm.pmap.pmap_l1s is the number of times the level 1 page tables that had to share with an existing l1 pagetable. vm.pmap.pmap_l1m is the max number of level 1 pagetables at any given time. --Mark Tinguely
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