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TJ,
I could be wrong because I haven't tried to write something to
utilize multiple cpu/core configurations within the same box, but I
know from writing parts of IO that allow for cooperative optimization
between multiple boxes that one can keep the overhead very low and I
would think ?! that there is a much higher chance for overhead to be
considerably higher using multiple boxes then multiple cpu's/cores on
the same box.
--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx>
wrote:
>
> Hello,
>
> To take advantage of any CPU feature the program has to be
specifically
> built for given feature.
> No gain is "automatic". You need to code specifically for given
feature.
>
> When it comes to 64 bit - the source code had to be adjusted
> in several hundreds of lines where incompatiblities were found.
> Plus it had to be compiled with new 64 bit compiler and run on 64
bit computer
> running 64 bit version of Windows.
>
> Multi-core support is similar, although more complex story -
> the code needs to be restructured significantly. Also even if you
restructure
> the code you may find out that there is no gain because the speed
> is limited not by execution of CPU but by memory access because
> modern CPUs can often calculate more data than RAM is able to
read/store.
> Also thread switching / synchronization make eat all theoretical
gains.
> For example if you make array addition parallel it will run SLOWER
on dual
> core than on single core unless array has hundreds of thousands
bars because
> of thread management overhead.
> Multiple CPU/Core is only able to run at full speed if data and
code can
> fill entirely within integrated on-die processor cache. This is
rarely the case
> when it comes to data of thousands of symbols each having thousands
of data bars.
> As soon as processor needs to access RAM it simply needs to wait.
> Single core can be amazingly fast when processing arrays and it is
much
> faster than RAM. Code compiled with SSE instructions enabled (x64
version does that),
> use SIMD instructions that can add/multiply 4 numbers in one CPU
cycle.
> This is way way faster than RAM speed so processor wastes time
waiting for
> RAM access if data are not fully present in CPU cache. And adding
second core
> does not help if RAM is bottleneck.
> What I am talking about here is not theoretical stuff but something
I actually
> measured on internal testing versions of AB that used parallelized
parts.
>
> Current production versions of AB do not use multiple cores.
>
> It will change sooner or later but currently I give no dates.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: mark keitel
> To: amibroker@xxxxxxxxxxxxxxx
> Sent: Wednesday, November 22, 2006 8:26 PM
> Subject: RE: [amibroker] Re: Can anyone explain Why AmiBrokers
instead of Metastock
>
>
> Thomas,
>
>
>
> If 64 bit adds 25% to AB's speed
>
> How much will the Dual Core add?
>
>
>
> Mark
>
>
>
>
> --------------------------------------------------------------------
----------
>
> From: amibroker@xxxxxxxxxxxxxxx
[mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of Tomasz Janeczko
> Sent: Wednesday, November 22, 2006 11:41 AM
> To: amibroker@xxxxxxxxxxxxxxx
> Subject: Re: [amibroker] Re: Can anyone explain Why AmiBrokers
instead of Metastock
>
>
>
> Actually 64 bit itself adds 25% to AmiBroker speed (AFL
execution).
> http://www.amibroker.com/x64/
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "Fred" <ftonetti@xxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Wednesday, November 22, 2006 5:18 PM
> Subject: [amibroker] Re: Can anyone explain Why AmiBrokers
instead of Metastock
>
> > I'd leave it ...
> >
> > Speed - Although there are 32 & 64 bit versions of the program,
64
> > bit in and of itself is not likely to add a lot of speed to ANY
> > program. As far as the programs speed is concerned, this is the
> > single biggest reason I tossed TradeStation in favor of
AmiBroker
> > years ago. In this regard, MetaStock isn't even a close 3rd ...
> >
> > Dual CPU/Core - There is a planned enhancement to be able to
utilize
> > multuiple CPU's / Cores for AmiBroker optimization. TJ would
have to
> > be the one to speak to when that would most likely be
available.
> > There are already add in products that allow multiple machines
to
> > cooperate in this process.
> >
> > Ease of Use - I find AmiBroker to be no better or worse in this
> > regard then any other platform, but I suspect different people
will
> > see this one differently.
> >
> > Add Ins / PlugIns - I personally find it extremely unlikely
that
> > other platforms are as flexible in this regard as AmiBroker.
One can
> > write their own DLL's in C++ and/or other languages if one
desires
> > and use OLE/Automation to drive AmiBroker in almost any way one
> > wants.
> >
> > --- In amibroker@xxxxxxxxxxxxxxx, "Natasha ~~!!!"
> > <ghostship.blackparrot@> wrote:
> >>
> >> hello,
> >>
> >> Depends why u are buying the software . If u are buying to
make
> > money on
> >> the stock markets
> >> by trading then amibroker will make you lots of money and this
> > would be
> >> extremely good value for money .
> >>
> >>
> >> Else u can buy either , it makes no difference .
> >>
> >> I am assuming that one would make money on the stock markets
> > if one has
> >> a good trading system adn
> >> strategy and ease of operation of both looking at charts and
> > designing a
> >> system to suit your trading
> >> mentality and bank balance.
> >>
> >> Of couse this is my take and it is mine .Take it or leave it
> > is your
> >> take .
> >>
> >> ````` Natasha !!!!!!
> >>
> >>
> >> On 11/22/06, mytakeismine <mytakeismine@> wrote:
> >> >
> >> > Why AmiBrokers instead of Metastock?
> >> > Speed, ease of use, add-ins and plug-ins, richness and
maturity
> >> >
> >> > Speed, Is this 32bit or a 64bit program? will this benefit
from
> > dual
> >> > processors(smp)?
> >> >
> >> > Ease of use, Learning curve this verses Metastock, intuitive?
> >> >
> >> > Add-ins and plug-ins, Can you get more or less with this
verses
> >> > metastock?
> >> >
> >> > Intuitive, does it easily makes sence the way it was written
> > almost
> >> > anticipating your needs?
> >> >
> >> > I am asking this here and at metastock, I have known about
> > Metastock
> >> > for sometime and am just hearing for the first time about
> > AmiBrokers
> >> >
> >> > Thanks
> >> > mytakeismine
> >> >
> >> >
> >> >
> >>
> >>
> >>
> >> --
> >> Warm Regards;
> >> `````` Natasha !!!
> >>
> >
> >
> >
> >
> >
> > Please note that this group is for discussion between users
only.
> >
> > To get support from AmiBroker please send an e-mail directly to
> > SUPPORT {at} amibroker.com
> >
> > For NEW RELEASE ANNOUNCEMENTS and other news always check
DEVLOG:
> > http://www.amibroker.com/devlog/
> >
> > For other support material please check also:
> > http://www.amibroker.com/support.html
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
>
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