Date: Tue, 13 Apr 2010 08:34:31 +0900 (JST) From: Maho NAKATA <chat95@mac.com> To: freebsd@jdc.parodius.com Cc: freebsd-stable@freebsd.org, avg@icyb.net.ua Subject: Re: Only 70% of theoretical peak performance on FreeBSD 8/amd64, Corei7 920 Message-ID: <20100413.083431.468378203492543907.chat95@mac.com> In-Reply-To: <20100412150023.GA80292@icarus.home.lan> References: <20100412.131213.4959786962516027.chat95@mac.com> <4BC3311F.5060503@icyb.net.ua> <20100412150023.GA80292@icarus.home.lan>
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Hi Andriy and Jeremy In my case, % sysctl vm.pmap.pg_ps_enabled vm.pmap.pg_ps_enabled: 1 thanks a lot! From: Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: Only 70% of theoretical peak performance on FreeBSD 8/amd64, Corei7 920 Date: Mon, 12 Apr 2010 08:00:23 -0700 > On Mon, Apr 12, 2010 at 05:41:35PM +0300, Andriy Gapon wrote: >> Perhaps, he talks about support of large pages (2M) and related improvements in >> TLB performance. If so, he (and you) may read about 'superpages' feature of FreeBSD. >> I am not sure if it is enabled by default in 8.0, you can check vm.pmap.pg_ps_enabled. > > On 8.0-RELEASE and later, they are. Line 183: > > http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/amd64/amd64/pmap.c?annotate=1.667.2.12 > > Commit where they got enabled by default (approx. 16 months ago): > > http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/amd64/amd64/pmap.c#rev1.646 > > -- > | Jeremy Chadwick jdc@parodius.com | > | Parodius Networking http://www.parodius.com/ | > | UNIX Systems Administrator Mountain View, CA, USA | > | Making life hard for others since 1977. PGP: 4BD6C0CB | > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >
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