Date: Wed, 10 Jul 2013 13:50:52 +0400 From: Sergey Kandaurov <pluknet@gmail.com> To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> Cc: freebsd-hackers <freebsd-hackers@freebsd.org> Subject: Re: hw.physmem/hw.realmem question Message-ID: <CAE-mSOJFxA%2B3Kd9dy56M6bFc3Dh1JBRRoD-zWXfdUuHTCVtHAA@mail.gmail.com> In-Reply-To: <alpine.BSF.2.00.1307022343590.4738@wojtek.tensor.gdynia.pl> References: <E1Utzkq-000Jin-Ig@kabab.cs.huji.ac.il> <alpine.BSF.2.00.1307022343590.4738@wojtek.tensor.gdynia.pl>
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On 3 July 2013 01:45, Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> wrote: >> AMD Features2=0x1<LAHF> >> TSC: P-state invariant, performance statistics >> real memory = 34359738368 (32768 MB) >> avail memory = 32191340544 (30700 MB) > > > 2GB memory "disappears" too even when you don't set anything. > > i asked such a question for other machine some time ago without much answer. > > > in your laptop it may be shared graphics memory reserved by chipset > > still on my dell server > > > real memory = 34359738368 (32768 MB) > avail memory = 33166921728 (31630 MB) > > i have over 1GB unavailable and it doesn't have shared graphics memory. > > it would be nice to be able to look exactly how memory is used. On amd64 about 3% is cut on startup for page structures, see vm_page_startup(). -- wbr, pluknet
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