|
Tomasz,
I wonder if you have an update regarding 64 bits
version of AB. (see post below)
AMD64 has come down in price quite a lot. You I cant
wait to have a faster platform to run my
optimization.
Thanks in advance.
Paul
Dan,
64-bit CPU and dual-core will not have significant
impact on CURRENT version of AmiBroker,
however I already have received Visual Studio
2005 BETA which features 64bit compiler
so in some near future (by the end of this year)
I will probably release 64 bit version
(32 bit version will still be developed in parallel
- so don't worry everyone else :-))
As for dual-core - similar situation here - right
now you won't see miracles however
I am going to add multiple-threaded optimization
engine by the end of the year
(I have to purchase AMD64 machine first
:-))
So dual core AMD64 would be good investment for the
future. However I suggest to WAIT a bit
until I release first betas because till then you
will be able to get faster machine for less money
(as prices of dual core CPUs are very high now but
will drop very quickly)
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
Sent: Wednesday, June 22, 2005 4:22
PM
Subject: RE: [amibroker] AmiBroker
Computer Performance -- What Matters?
Tomasz,
I want to upgrade my
system specifically to improve AB performance. So, assuming
an AMD CPU, with fast SCSI disks and at least 1.5Gb of memory, what is your
opinion of the impact of the following on AB
performance:
n
64 bit
CPU and motherboard?
n
Dual-core
CPU?
n
64 bit
MS Windows?
Thanks and
regards,
Dan.
From:
amibroker@xxxxxxxxxxxxxxx
[mailto:amibroker@xxxxxxxxxxxxxxx]
On Behalf Of Tomasz
Janeczko
Sent: Wednesday,
June 22, 2005 5:39 AM
To:
amibroker@xxxxxxxxxxxxxxx
Subject: Re: [amibroker] AmiBroker
Computer Performance -- What Matters?
Hello,
The answer is simple Pentium-4 is marketing trick from
Intel,
all they did is to increase
the length of the instruction pipeline which helped
to increase clocks speeds to extreme values. Extremely long
pipeline however
works in
media/streaming data apps but does not work in regular (business) apps.
This was done because buyers pay
attention to clock speeds instead
of real performance.
The result is that Pentium-4 in regular applications
(excluding streaming media)
is
actually slower than Pentium-3 when running same clock
speed.
Of course P4 are
available with higher clocks speeds and this is what buyers
receive
(high clock speed, low
performance).
Xeons are faster
because they are based on Pentium-III
architecture.
Anyway, I
strongly recommend Athlons which are more powerful and cost
less.
And yes harddisk
performance is a big factor if data can not be held entirely in
RAM.
So RAM size matters the
most.
Best
regards,
Tomasz
Janeczko
amibroker.com
----- Original Message -----
From: "tycanadian2003"
<tyler.schlosser@xxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Wednesday, June 22, 2005 11:10
AM
Subject: [amibroker] AmiBroker
Computer Performance -- What Matters?
> Hi,
>
> I am doing a few studies of
my trading system that require a LOT of
> computing power. I
need to run a few thousand optimization steps. I
> know CPU matters, but I'm
wondering what specifically matters (FLOPS,
> MIPS, Cache size, etc.), as well as what other factors
make a big
> difference (RAM,
Hard Drive speed, etc.). Basically, I'm curious what
> to emphasize or expect if I
were to obtain some new PC's.
>
> Normally I would just test
and see what makes a difference, but I am a
> bit baffled by what I am seeing. My stock
database is roughly 560 MB.
> Here are some system specs along with backtest times
for my system:
>
> P4 1.8 GHz, 1 GB RAM,
10,000RPM SCSI Ultra 160 -- 8.5 minutes
> P4 1.8 GHz, 512 MB RAM, 10,000RPM SCSI Ultra 160 --
9.2 minutes
> P3 0.733 GHz, 768
MB RAM, 10,000RPM SCSI Ultra 160 -- 9.6 minutes
> P3 0.733 GHz, 256 MB RAM, 10,000RPM SCSI Ultra 160 --
9.8 minutes
> Dual P4 Xeon 3.06
GHz, 2.5 GB RAM, 10,000RPM SCSI Ultra 320 (running
> two simultaneous instances of AmiBroker, two backtests
simultaneously) -
> - 4.1
minutes (total time for a total of two backtests)
>
>
Basically, I am wondering why the P4 with 512MB RAM barely outperforms
> the P3 with 256 MB RAM, but
the Xeon system is much faster than the P4
> systems. Is hard drive bandwidth really that big
of a factor? Both
> the
P4 system with 1GB RAM as well as the Xeon system seem to grab all
> the RAM they need (with some
still left over).
>
> Any thoughts on this would
be welcome. Thanks.
>
>
>
>
>
>
>
>
> 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
other support material please check also:
> http://www.amibroker.com/support.html
>
>
> Yahoo! Groups
Links
>
>
>
>
>
>
>
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 other
support material please check also:
http://www.amibroker.com/support.html
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 other support material please check also:
http://www.amibroker.com/support.html
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 other support material please check also:
http://www.amibroker.com/support.html
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 other support material please check also:
http://www.amibroker.com/support.html
YAHOO! GROUPS LINKS
|