RAM shows less
Jatin K
ssh.fedora at gmail.com
Tue May 11 04:48:44 UTC 2010
On Tuesday 11 May 2010 01:40 AM, Bill Davidsen wrote:
> Jatin K wrote:
>
>> 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.
>>>
>>>
> It may explain, note that you have 3GB starting at zero, a hole, and 1GB
> starting at 4GB. I'm surprised that the system did that well considering you
> have 2x2GB DIMMs.
>
> There are two more things you can look at, /proc/meminfo
cat /proc/meminfo
-------------------------------------
MemTotal: 3917912 kB
MemFree: 2801136 kB
Buffers: 39520 kB
Cached: 319800 kB
SwapCached: 0 kB
Active: 469492 kB
Inactive: 274412 kB
Active(anon): 394632 kB
Inactive(anon): 16 kB
Active(file): 74860 kB
Inactive(file): 274396 kB
Unevictable: 16 kB
Mlocked: 16 kB
SwapTotal: 4805624 kB
SwapFree: 4805624 kB
Dirty: 88 kB
Writeback: 0 kB
AnonPages: 384492 kB
Mapped: 112952 kB
Shmem: 10060 kB
Slab: 38800 kB
SReclaimable: 20704 kB
SUnreclaim: 18096 kB
KernelStack: 2424 kB
PageTables: 19876 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 6764580 kB
Committed_AS: 1084840 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 314468 kB
VmallocChunk: 34359421308 kB
HardwareCorrupted: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 280576 kB
DirectMap2M: 3774464 kB
> will show what the
> system views as usable memory, and the output of dmidecode will show tons of
> stuff, but there will be one info block per DIMM which shows information on just
> that DIMM. I suspect you are getting a few MB of RAM shared for video, or
> something like that.
I've ATI Mobility Radeon HD 5450 with 1GB dedicated memory
following[1] is the output of " lspci | grep VGA " command
[1]---------
02:00.0 VGA compatible controller: ATI Technologies Inc Manhattan
[Mobility Radeon HD 5000 Series]
> The information in /var/log/messages will give more detail
> about how the memory is being allocated, but it's unlikely to lead to recovering
> more useful space.
>
> At least you have learned a lot about looking at your system, score one more for
> "things I learned while looking for something else."
>
>
--
°v°
/(_)\
^ ^ Jatin Khatri
Registerd Linux user No #501175
www.counter.li.org
No M$
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