RE: lug-bg: Over 4GB on x86
- Subject: RE: lug-bg: Over 4GB on x86
- From: bkrosnov@xxxxxxxx (Boyan Krosnov)
- Date: Tue, 31 Jul 2001 16:34:05 +0300
> Ostava vyprosa dali tokyv shirok adres mowe da se iznese ot
> procesora ...
edinstweniq nachin na x86 da se adresira poweche ot 4GB ram e sys smqna
na stranici.
t.e. w edin moment procesora moje da adresira naj-mnogo 4GB ram, no ima
nachin da se podmenq koi 4GB ot fizicheskata ram se adresirat.
po syshtiq nachin kato na 6502, smqna na stranici.
do kolkoto sym chel Linux 2.4 moje da raboti s poweche ot 4GB ram, no ne
moje w edin proces da adresira poweche ot 4GB ot tqh. Koeto razni hora
se oplakwaha che e seriozen problem za izpolzwaneto na x86 za golemi
matematicheski smetki.
S drugi dumi kupete si mashina sys Alpha, Sparc64, PowerPC, PARISC, ia64
ili amd64 arhitektura ako iskate poweche ram.
BR,
Boyan
> -----Original Message-----
> From: Vladimir Djouvinov [mailto:vd298@xxxxxxxxxxxxxxx]
> Sent: Tuesday, July 31, 2001 3:58 PM
> To: lug-bg@xxxxxxxxxxxxxxxxxx
> Subject: Re: lug-bg: Over 4GB on x86
>
>
>
>
> Zdravejte,
>
> On Tue, 31 Jul 2001, Ivaylo Toshev wrote:
>
> > áÇÁ ÐÅÓÌÕÂÅßÉÞÐÞ ÕÌÒÍÏËÞÆÕÚ ÌÞ 2.4 ÚÄÏÍÐÍ ÎÕÜÅ ÂÅ ÎÍÄÄÇÏÔÞ Ä
> Í 64GB ÌÞ i x86 !
> > éÞÉ ÍÀÞÂÅ ÖÍ ÎÍßÐÕÖÞÐ -ÌÚÚË ÎÏÅÄßÐÞÁÞ .
>
> Struva mi se, che za adresiraneto nad 4GB mowe da se polzva
> tochno segment
> offsetting, t.e. systavqne na adresa chrez shift i sybirane
> sys bazisen
> adres. Mowe bi za tazi cel se polzva adresniq rewim "base plus scaled
> index"
>
> address = base + (2^scale * index)
>
> kydeto scale = 0,1,2,3
>
> celta RAM kontrolera i backplane bus systo bi trqbvalo da
> poddyrwat takyv
> rewim. Tova obache struva ekstra pari, i edva li go ima na
> dynnite platki.
>
> Popadna mi edno pisanie, kydeto se tvyrdi, che po tozi nachin
> starite 16
> bitovi procesori sa mogli da polzvat poveche RAM.
>
> Pozdravi,
>
> Vladimir Djouvinov
>
> > áÐÍÏÌÕÉ 31 ÷ÊÕ , 2001 13:08 , Vladimir Djouvinov ÌÞÎÕßÞÓÐÅ:
> > > Zdravej,
> > >
> > > On Tue, 31 Jul 2001, Oleg Shishmanov wrote:
> > > > [Oleg@servizen Oleg]$ free
> > > > total used free shared buffers
> > > > cached
> > > > Mem: 770988 77468 693520 0 3112
> > > > 38832
> > > > -/+ buffers/cache: 35524 735464
> > > > Swap: 80284 0 80284
> > > > [Oleg@servizen Oleg]$
> > > >
> > > > Me4taja si da izprobvam i s 64GB, no njamam podhodjashto duno...
> > >
> > > Za sywalenie, ste ti trqbva i 64 bitov mikroprocesor,
> zastoto x86 e 32
> > > bitov, a te ne mogat da adresirat nad 4Gb (ako ne se polzva page
> > > offsetting).
> > >
> > >
> > > Pozdravi,
> > >
> > > Vladimir Djouvinov
>
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