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
Yahoo! Groups Links