[colug-432] 64bit OS Not Seeing All RAM

[Mike Plemmons]

On Jun 7, 2015 1:37 PM, "tom" <thomas.w.cranston at gmail.com> wrote:
>
> Installed LinuxMint 17 64bit ver2 on Dell Optiplex 210L.  64bit P4,
> Hyperthreading enabled = running in 64bit mode. New Crucial 4 GB RAM (2
> 2GB sticks), Onboard video - Video Memory Size Is set at 8 MB. I only
> have 3 GB RAM available. Setup sees 4 GB of RAM. Since I am running 64
> bit OS all of the RAM should be available. Is there something about the
> 64 bit P4 that is causing this problem.
>
> $ cat /proc/cpuinfo
> processor : 0
> vendor_id : GenuineIntel
> cpu family : 15
> model : 4
> model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
> stepping : 9
> microcode : 0x3
> cpu MHz : 2992.563
> cache size : 1024 KB
> physical id : 0
> siblings : 2
> core id : 0
> cpu cores : 1
> apicid : 0
> initial apicid : 0
> fpu : yes
> fpu_exception : yes
> cpuid level : 5
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
> pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm
> constant_tsc pebs bts nopl pni dtes64 monitor ds_cpl cid cx16 xtpr lahf_lm
> bogomips : 5985.12
> clflush size : 64
> cache_alignment : 128
> address sizes : 36 bits physical, 48 bits virtual
> power management:
>
> processor : 1
> vendor_id : GenuineIntel
> cpu family : 15
> model : 4
> model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
> stepping : 9
> microcode : 0x3
> cpu MHz : 2992.563
> cache size : 1024 KB
> physical id : 0
> siblings : 2
> core id : 0
> cpu cores : 1
> apicid : 1
> initial apicid : 1
> fpu : yes
> fpu_exception : yes
> cpuid level : 5
> wp : yes
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
> pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm
> constant_tsc pebs bts nopl pni dtes64 monitor ds_cpl cid cx16 xtpr lahf_lm
> bogomips : 5985.12
> clflush size : 64
> cache_alignment : 128
> address sizes : 36 bits physical, 48 bits virtual
> power management:
>
>
> $ cat /proc/meminfo
> MemTotal: 3071852 kB
> MemFree: 1781128 kB
> Buffers: 50152 kB
> Cached: 530220 kB
> SwapCached: 0 kB
> Active: 734852 kB
> Inactive: 461068 kB
> Active(anon): 616424 kB
> Inactive(anon): 87672 kB
> Active(file): 118428 kB
> Inactive(file): 373396 kB
> Unevictable: 0 kB
> Mlocked: 0 kB
> SwapTotal: 4876284 kB
> SwapFree: 4876284 kB
> Dirty: 264 kB
> Writeback: 0 kB
> AnonPages: 615540 kB
> Mapped: 113656 kB
> Shmem: 88556 kB
> Slab: 41624 kB
> SReclaimable: 24600 kB
> SUnreclaim: 17024 kB
> KernelStack: 2816 kB
> PageTables: 16592 kB
> NFS_Unstable: 0 kB
> Bounce: 0 kB
> WritebackTmp: 0 kB
> CommitLimit: 6412208 kB
> Committed_AS: 2160812 kB
> VmallocTotal: 34359738367 kB
> VmallocUsed: 544412 kB
> VmallocChunk: 34359186436 kB
> HardwareCorrupted: 0 kB
> AnonHugePages: 71680 kB
> HugePages_Total: 0
> HugePages_Free: 0
> HugePages_Rsvd: 0
> HugePages_Surp: 0
> Hugepagesize: 2048 kB
> DirectMap4k: 41504 kB
> DirectMap2M: 3094528 kB
>
>
> $ egrep "model name|address" /proc/cpuinfo
> model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
> address sizes : 36 bits physical, 48 bits virtual
> model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
> address sizes : 36 bits physical, 48 bits virtual
>
>
> $ uname -a
> Linux user-OptiPlex-210L 3.13.0-24-generic #47-Ubuntu SMP Fri May 2
> 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
>
>
> $ cat /etc/*release
> DISTRIB_ID=LinuxMint
> DISTRIB_RELEASE=17
> DISTRIB_CODENAME=qiana
> DISTRIB_DESCRIPTION="Linux Mint 17 Qiana"
> NAME="Ubuntu"
> VERSION="14.04, Trusty Tahr"
> ID=ubuntu
> ID_LIKE=debian
> PRETTY_NAME="Ubuntu 14.04 LTS"
> VERSION_ID="14.04"
> HOME_URL="http://www.ubuntu.com/"
> SUPPORT_URL="http://help.ubuntu.com/"
> BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"
> cat: /etc/upstream-release: Is a directory
>
> Tom
>
> --
> Sent by LinuxMint
>
> --
> Sent by LinuxMint
>
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>From what I have read the Pentium 4 is not a 64 bit processor.

http://www.tomshardware.com/forum/285872-28-pentium-00ghz-chip-windows-compatible

Although, the following Wikipedia article says some P4s do support 64 bit
but it depends on the model.
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