RE: [GD-Windows] How to determine total physical memory available ?
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RE: [GD-Windows] How to determine total physical memory available ?
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From: Simon O'C. <si...@sc...> - 2004-01-27 00:37:39
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Although I've not tried it myself, WMI (assuming 2K/XP) seems to have a =
few
things for getting lots of information about the hardware - not sure how
much of that info is available on all systems though - I'll give it a =
try
when I get a free moment - there's a lot of very intriguing stuff you =
can
query in there such as:
"Win32_PhysicalMemoryArray"
"Win32_PhysicalMemoryLocation"
"Win32_PhysicalMemory"
Which seem to have stuff as hardcore as the chip package type, speed in =
ns,
chip manufacturer, bank layout.
Simon O'Connor
Programmer @ Acclaim
& Microsoft DirectX MVP =20
> -----Original Message-----
> From: gam...@li...=20
> [mailto:gam...@li...] On=20
> Behalf Of Yannick Letourneau
> Sent: 26 January 2004 21:15
> To: gam...@li...
> Subject: RE: [GD-Windows] How to determine total physical=20
> memory available ?
>=20
> Both ;-)
>=20
> Yeah, right now I'm doing as you're suggesting but I still=20
> would like to display the right value to the user. I guess=20
> I'll have to live with it unless I find a better way.
>=20
> Yannick
>=20
> -----Original Message-----
> From: Simon O'Connor [mailto:si...@sc...]
> Sent: Monday, January 26, 2004 4:07 PM
> To: gam...@li...
> Subject: RE: [GD-Windows] How to determine total physical=20
> memory available ?
>=20
>=20
>=20
> BTW:
>=20
> Do you actually need the value for presentation to the user?
>=20
> Or is this to determine whether the user has enough physical=20
> memory to run your game or use advanced memory hungry features?
>=20
>=20
> If it's the latter, then you should only really use the value=20
> as a rough guide (much the same as with total video memory), e.g.:
>=20
> if (memorysize < 500000000)
> {
> alert( "sorry this game requires a minimum of 512MB" );
> return;
> }
>=20
> m_enableMemoryHoggingFeature =3D false;
>=20
> if (memorysize >=3D 1000000000)
> {
> m_enableMemoryHoggingFeature =3D true;
> }
>=20
>=20
> Of course, you can never assume all of that physical memory=20
> is yours to play with anyway (kernel allocations, AGP=20
> reservation etc).
>=20
>=20
> Simon O'Connor
> Programmer @ Acclaim
> & Microsoft DirectX MVP=20
>=20
> > -----Original Message-----
> > From: gam...@li...
> > [mailto:gam...@li...]=20
> On Behalf Of=20
> > Yannick Letourneau
> > Sent: 26 January 2004 20:21
> > To: gam...@li...
> > Subject: RE: [GD-Windows] How to determine total physical memory=20
> > available ?
> >=20
> > Actually it would be a little more complicated since memory=20
> can be a=20
> > sum of different power of 2 (for example if you have one=20
> memory chip=20
> > of 128 MB and another of 64 MB totaling 192MB which is not power of=20
> > 2).
> >=20
> > I'd rather not make this kind of assumption myself and let=20
> the system=20
> > give me the exact numbers ;-)
> >=20
> > -----Original Message-----
> > From: Timur Davidenko [mailto:ti...@cr...]
> > Sent: Monday, January 26, 2004 3:16 PM
> > To: gam...@li...
> > Subject: RE: [GD-Windows] How to determine total physical memory=20
> > available ?
> >=20
> >=20
> > I guess System Information tool just rounds this number to the next=20
> > "reasonable" number.
> > It knows that memory chips don't come in 1022Mb setups..
> > So it`s quite easy to round number you get to closest power of 2..
> >=20
> > _____________________
> > Timur Davidenko.
> > Crytek (http://www.crytek.com)
> >=20
> > -----Original Message-----
> > From: Yannick Letourneau [mailto:yle...@ub...]
> > Sent: Monday, January 26, 2004 8:47 PM
> > To: gam...@li...
> > Subject: [GD-Windows] How to determine total physical=20
> memory available=20
> > ?
> >=20
> > I need to determine how much memory is installed on the=20
> user's system=20
> > somehow.
> >=20
> > I used GlobalMemoryStatus but the values returned in the member=20
> > dwTotalPhys is always underestimating a bit. For example on my dev=20
> > machine it returns
> > 1022 MB although I have 1024 MB installed. Same thing=20
> happens on all=20
> > systems I've tested.
> >=20
> > Same thing is reported in dxdiag.exe so they seem to use=20
> that function=20
> > as well.
> >=20
> > However, when I use the System Information tool in the=20
> system tools of=20
> > Windows, it correctly reports 1024 MB.
> >=20
> > So anyone knows how I can get the exact information ?
> >=20
> > Yannick L=E9tourneau
> > UBISOFT
> >=20
> >=20
> >=20
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> _______________________________________________
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