[amibroker] Re: AB 5.29, Windows 7 (64bit) and i7

["Boris" <borisamibroker@xxxxxx>]

Hi Thomas,
but how much ram needs one symbol?
If I have 4 MB cache then I make a guess.
The price is 3 digits plus dot plus 2 digits. Say 6 digits.
e.g. 233.12$. The symbolname is e.g. 12 for ISIN.
So 4(o,h,l,c) * pricedigits * days(252eod*years) * amountOfSymbols + symbolDigits <= cache (e.g.4mb)
So how many 10 year symbols can I run in a 4 mb cache?
amountOfSymbols = 4194304 / (4 * 6 * 252 * 10 + 12) = 69 symbols.
Ups! 
Is that correct?
Boris
--- In amibroker@xxxxxxxxxxxxxxx, Tomasz Janeczko <groups@xxx> wrote:
>
> Hello,
> 
> You guys still do not understand that limiting factor is _not_ CPU, but 
> MEMORY speed.
> SINGLE core is able to fully saturate RAM memory bandwidth and this is 
> exactly what
> is happening if you are using anything more than 8MB of data that is the 
> size of on-chip cache.
> 
> Best regards,
> Tomasz Janeczko
> amibroker.com
> 
> On 2010-03-14 19:33, Steve Dugas wrote:
> > Hi - I am guessing that your computer is multi-core?  AB is not written for
> > multi-threaded optimization - I have a quad-core, 1 instance of AB uses 25%
> > of total CPU power so I run 4 instances side-by-side when optimizing to keep
> > the CPU maxed out.  I don't think I have heard of a 6-core machine but 16%
> > CPU usage sounds like maybe 6 cores?  Anyway, you can run multiple
> > instances, OR you should also check out Fred's MCO program in the files
> > section which he wrote for maximizing use of multiple cores and even
> > multiple computers.
> >
> > Steve
> >
> > ----- Original Message -----
> > From: "liveyourdream4ever"<frankhassler@xxx>
> > To:<amibroker@xxxxxxxxxxxxxxx>
> > Sent: Saturday, March 13, 2010 5:27 AM
> > Subject: [amibroker] AB 5.29, Windows 7 (64bit) and i7
> >
> >
> >    
> >> Hello,
> >>
> >> i'm running AB 5.29 on W7(64bit) with a i7 CPU. When using the optimizer
> >> the i7 CPU isn't really busy, only up to 16%.
> >>
> >> Has anyone experience with such an environment?
> >> What can i expect in terms of CPU load factor?
> >>
> >> Thanks for your response.
> >>
> >>
> >>
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> >
> >
> >
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> >
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>




------------------------------------

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