Date: Wed, 09 Aug 2006 13:30:50 -0700 From: "Jin Guojun [VFFS]" <j_guojun@lbl.gov> To: Krassimir Slavchev <krassi@bulinfo.net> Cc: Julian Stacey <jhs@berklix.org>, hardware@freebsd.org Subject: Re: Real and available memory? Message-ID: <44DA45FA.3060306@lbl.gov> In-Reply-To: <44D9B553.6030003@bulinfo.net> References: <200608090908.k79988pY086073@fire.jhs.private> <44D9B553.6030003@bulinfo.net>
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Krassimir Slavchev wrote: > ........ > >> > > I can't find anything related to video memory in the BIOS but it seems > to be correct > real memory = 120 Mb reported by the kernel. > My question is why the available memory is only 80Mb? Have every body looked your computer to see how many avaiable memory is there? 80 is a round-up number in 6.x release. I think it looks normal to me. It really depends on how the system is configured. Beside kernel memory, there is a number of wired memory blocks, which take away available memory. Below are some systems I can access -- (1) difference is 33MB FreeBSD 4.11-RELEASE #1: Mon Dec 26 22:56:54 PST 2005 Timecounter "i8254" frequency 1193182 Hz CPU: AMD Athlon(TM) XP 2100+ (1733.41-MHz 686-class CPU) ... real memory = 1073721344 (1048556K bytes) avail memory = 1039896576 (1015524K bytes) (2) difference is 28MB FreeBSD 6.1 CPU: AMD Turion(tm) 64 Mobile Technology ML-34 (1790.83-MHz K8-class CPU) Origin = "AuthenticAMD" Id = 0x20f42 Stepping = 2 ... real memory = 501874688 (478 MB) avail memory = 472735744 (450 MB) (3) difference is 340 MB Intel(R) Xeon(TM) CPU 3.06GHz hw.physmem: 2142212096 hw.usermem: 1785118720 -- ------------ Jin Guojun ----------- v --- jin@george.lbl.gov --- Distributed Systems Department http://www.dsd.lbl.gov/~jin Lawrence Berkeley National Laboratory, Berkeley, CA 94720
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