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athlon 64 + FC4 == SLOW
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cmk128@hotmail.com
*nix forums beginner


Joined: 12 Aug 2005
Posts: 28

PostPosted: Sun Aug 28, 2005 11:17 am    Post subject: athlon 64 + FC4 == SLOW Reply with quote
Hi
I am using athlon 64 3400+ (2.4GHz), i got bogomips 4784.12 in
/proc/cpuinfo, it is same as my P4 2.4GHz. The problem is, my amd 3400+

run as slow as P4 2.4Ghz on fedora core 4 x86-32 version. why?
You may say my fedora is not 64 bits, so my amd 64bit cpu runs slow,

but my athlon 64 runs much faster than P4 on my 32 bits windows.


thanks
from Peter (cmk128@hotmail.com)
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General Schvantzkoph
*nix forums Guru


Joined: 20 Feb 2005
Posts: 425

PostPosted: Sun Aug 28, 2005 8:01 pm    Post subject: Re: athlon 64 + FC4 == SLOW Reply with quote
On Sun, 28 Aug 2005 06:17:27 -0700, cmk128 wrote:

Quote:
Hi
I am using athlon 64 3400+ (2.4GHz), i got bogomips 4784.12 in
/proc/cpuinfo, it is same as my P4 2.4GHz. The problem is, my amd 3400+

run as slow as P4 2.4Ghz on fedora core 4 x86-32 version. why?
You may say my fedora is not 64 bits, so my amd 64bit cpu runs slow,

but my athlon 64 runs much faster than P4 on my 32 bits windows.


thanks
from Peter (cmk128@hotmail.com)

What in particular is running slow? I hope you aren't using bogomips as
your metric, the bogo in bogomips stands for bogus. Bogomips is a simple
timing loop, it's not meant to be a benchmark. I'm not surprised that a
2.4GHz P4 and a 2.4GHz A64 have the same bogomips number. Bogomips is just
a for loop. The branches in a for loop are completely predictable, if you
do for(i=0;i<1000;i++) and guess that the branch will be taken you'll be
right 999 out of 1000 times. As a result the deep pipeline that cripples
the P4 on real programs (where branches are much less predictable) doesn't
matter. What you've found out is that bogomips is a measure of the clock
rate, not of the effective instruction rate.
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cmk128@hotmail.com
*nix forums beginner


Joined: 12 Aug 2005
Posts: 28

PostPosted: Sun Aug 28, 2005 11:26 pm    Post subject: Re: athlon 64 + FC4 == SLOW Reply with quote
I see, thank you for your answer, but my athlon64 3400+ open a console
is really slow, i tried many method, including shutdown all the
unnecessary daemon. But it still run slower than a P4 3.2Ghz computer.
thanks
from Peter
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General Schvantzkoph
*nix forums Guru


Joined: 20 Feb 2005
Posts: 425

PostPosted: Mon Aug 29, 2005 1:18 pm    Post subject: Re: athlon 64 + FC4 == SLOW Reply with quote
On Sun, 28 Aug 2005 18:26:34 -0700, cmk128 wrote:

Quote:
I see, thank you for your answer, but my athlon64 3400+ open a console
is really slow, i tried many method, including shutdown all the
unnecessary daemon. But it still run slower than a P4 3.2Ghz computer.
thanks
from Peter

How much RAM do you have? Opening any application the first time is a
function of disk speed, if you have enough RAM the applications are cached
and opening additional instances is much faster. Opening a terminal under
Gnome takes less than a second on my 3400+
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cmk128@hotmail.com
*nix forums beginner


Joined: 12 Aug 2005
Posts: 28

PostPosted: Tue Aug 30, 2005 4:07 am    Post subject: Re: athlon 64 + FC4 == SLOW Reply with quote
General Schvantzkoph 寫道：

Quote:
On Sun, 28 Aug 2005 18:26:34 -0700, cmk128 wrote:

I see, thank you for your answer, but my athlon64 3400+ open a console
is really slow, i tried many method, including shutdown all the
unnecessary daemon. But it still run slower than a P4 3.2Ghz computer.
thanks
from Peter

How much RAM do you have? Opening any application the first time is a
function of disk speed, if you have enough RAM the applications are cached
and opening additional instances is much faster. Opening a terminal under
Gnome takes less than a second on my 3400+


Hi
I have 1G DDR-400, i open and close gnome terminal many time, but it
seems doesn't faster next time.
thanks
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Dirk
*nix forums addict


Joined: 03 Apr 2005
Posts: 61

PostPosted: Tue Aug 30, 2005 9:06 am    Post subject: Re: athlon 64 + FC4 == SLOW Reply with quote
Op Sun, 28 Aug 2005 06:17:27 -0700, schreef cmk128 de volgende woorden:

Quote:
Hi
I am using athlon 64 3400+ (2.4GHz), i got bogomips 4784.12 in
/proc/cpuinfo, it is same as my P4 2.4GHz. The problem is, my amd 3400+

run as slow as P4 2.4Ghz on fedora core 4 x86-32 version. why?
You may say my fedora is not 64 bits, so my amd 64bit cpu runs slow,

but my athlon 64 runs much faster than P4 on my 32 bits windows.


thanks
from Peter (cmk128@hotmail.com)

do you have dma enabled on both your hard disks?
check it with:
hdparm /dev/hd(a...x)

and if needed, enable it with:
hdparm -d1 /dev/hd(a...x)

Dirk

--
Statistics: The (futile) attempt to offer certainty about uncertainty.
-- Roger Koenker, 'Dictionary of Received Ideas of Statistics'
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General Schvantzkoph
*nix forums Guru


Joined: 20 Feb 2005
Posts: 425

PostPosted: Tue Aug 30, 2005 1:07 pm    Post subject: Re: athlon 64 + FC4 == SLOW Reply with quote
Quote:
Hi
I have 1G DDR-400, i open and close gnome terminal many time, but it
seems doesn't faster next time.
thanks

1G is certainly enough. How slow is slow? On my systems opening a terminal
takes less then a second. Run gnome-system-monitor to see if there is some process
that is eating up your memory or CPU.
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Bill Marcum
*nix forums Guru


Joined: 28 Mar 2005
Posts: 1264

PostPosted: Tue Aug 30, 2005 7:50 pm    Post subject: Re: athlon 64 + FC4 == SLOW Reply with quote
On 29 Aug 2005 23:07:16 -0700, cmk128@hotmail.com
<cmk128@hotmail.com> wrote:
Quote:


Hi
I have 1G DDR-400, i open and close gnome terminal many time, but it
seems doesn't faster next time.
thanks

Slowness in opening a terminal might depend on what is in your .bashrc

(or other files if you use a shell other than bash).

--
Knowledge, sir, should be free to all!
-- Harry Mudd, "I, Mudd", stardate 4513.3
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