| Date: Mon, 10 May 2010 21:14:20 +0530 | From: Jatin K <ssh.fedora@xxxxxxxxx> | | On Monday 10 May 2010 08:29 PM, Bill Davidsen wrote: | > Jatin K wrote: | > | >> Dear All | >> | >> I've a new Dell Inspiton 1564 laptop with 1GB graphics card and 4GB DDR3 | >> RAM, FC 12 64bit installed on it , but in system information tab it | >> shows 3.7GB usable RAM. My Question is "what about the remaining RAM ??" | >> is it shared with graphics card ? then what is the meaning of dedicated | >> RAM of my graphics card ( if graphics card shares my installed ram module ) | >> | >> any idea ?? | >> | >> | > Look at the start of /var/log/messages, /proc/mtrr, etc. See if your CPU has PAT | > capability, etc. | > | > | Thnx Bill | | My processor is Intel i5 430 2.27Ghz ( turbo boost up to 2.53Ghz) | | and following is the output of cat /proc/mtrr | --------------------------------------------------------------------------------------- | reg00: base=0x0ffe00000 ( 4094MB), size= 2MB, count=1: write-protect | reg01: base=0x000000000 ( 0MB), size= 2048MB, count=1: write-back | reg02: base=0x080000000 ( 2048MB), size= 1024MB, count=1: write-back | reg03: base=0x100000000 ( 4096MB), size= 1024MB, count=1: write-back | reg04: base=0x138000000 ( 4992MB), size= 128MB, count=1: uncachable | ----------------------------------------------------------------------------------------- reg00: 2MiB of ROM? reg01 + reg02 + reg03: 4G of RAM reg04: 128MiB of video frame buffer? uncachable. Why is the frame buffer only 128MiB when you say that you have a 1G? Why does reg03 overlap with reg04? end of reg03's range: 4096 + 1024 = 5120; end of reg04's range: 4992 + 128 = 5120 So: reg04 overlaps with reg03 and covers the last 128MiB of reg03's range. Linux didn't much like overlapping MTRR ranges. It may be OK now that PAT is used by most X video controller drivers. (The problem is that video drivers usually want their memory to be write-combining and overlapping write-through and write-combining MTRRs isn't legal. If PAT is used instead of MTRR for setting the write-combining option, I think that it works.) As far as RAM goes, you seem to have 4096MiB - 128MiB = 3968MiB = 3.875GiB = 4063232KiB = 4160749568B | following[1] is the output of "free " command | total used free shared buffers cached | Mem: 3917912 1113388 2804524 0 39296 319600 | -/+ buffers/cache: 754492 3163420 | Swap: 4805624 0 4805624 So: you are still missing 145,320 KiB of RAM. I have no idea if that is to be expected. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
