Re: how to compare X Ghz processor to Y Ghz processor?
- From: Robert Heller <heller@xxxxxxxxxxxx>
- Date: Wed, 29 Oct 2008 08:27:05 -0500
At Tue, 28 Oct 2008 23:31:48 +0000 The Natural Philosopher <a@xxx> wrote:
ray wrote:
On Tue, 28 Oct 2008 13:27:23 -0700, Bennett Haselton wrote:not neceessarily. Depends what slows you down.
If I'm comparing dedicated Linux hosting offers, is there a rule of
thumb to tell which of two processors is going to be the faster, better
choice? (Assuming I'm just hosting a busy Web server.)
One hosting company suggested I "upgrade" from a machine with an Intel
Celeron 2.8 Ghz to a machine with an Intel Celeron 430 1.8 Ghz. At
first I wondered why the supposedly better one would have a smaller Ghz
number. But I know that an X Ghz processor is not necessarily faster
than a Y Ghz processor just because X > Y. But in that case, is there a
rule for determining which is better? A published list that lists all
processors in order by their speed (assuming a fixed task like running a
busy Web server)?
Bennett
The "faster one" is likely to be the one running on a chipset which offers
faster disc access.
a 1.8Ghz 64 bit chip with good cache will out compute a faster 32 bit
one with less cache..if you are compute bound.
This machine certainly is..a 450MHz Power PC is very slow...:-)
Sometimes its ram you are short of..if yo regularly rn a zillion
processes on a server, or manipulate very large graphic objects or movies..
Disk access only really affects program or data loading, unless you are
running a huge database with many users.
Comparing ghz can be fuitless if your processing is memory or disk
bound (or plain I/O bound). This is in fact often the case for many
desktop applications (word processing, web browsing, E-Mail, etc.).
My 500mhz desktop (with SCSI disks and 384meg of memory) runs yum
updates *faster* than my 700mhz laptop (ide disk, 128meg of ram). Both
32-bit PIIIs. Both running CentOS 4.7.
--
Robert Heller -- Get the Deepwoods Software FireFox Toolbar!
Deepwoods Software -- Linux Installation and Administration
http://www.deepsoft.com/ -- Web Hosting, with CGI and Database
heller@xxxxxxxxxxxx -- Contract Programming: C/C++, Tcl/Tk
.
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