I would say that you should be
testing out a
P4 3.2ghz with Hyperthreading.
From what I have been told, a
computer system needs to be over 2.8ghz for mathematical speed to really be noticeable.
And in addition a hyperthread machine will kick that into overdrive.
I have not done testing like you and
work off of a laptop myself P4 3.4ghz Hyperthreading 2gb Ram
During the market hours I see that my
computer at times is grabbing 1.7 mb of ram at times. This is when all my
program are open and I am running Amibroker in a backtest or a scan/explore
NO Xeon 64bit processor yet though
Mark
From: amibroker@xxxxxxxxxxxxxxx [mailto:amibroker@xxxxxxxxxxxxxxx] On Behalf Of tycanadian2003
Sent: Wednesday, June 22, 2005
5:11 AM
To: amibroker@xxxxxxxxxxxxxxx
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.
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