[RC5] P4 Speed Question

bwilson at fers.com bwilson at fers.com
Sun Jun 10 23:41:24 EDT 2001


The P4 supports all the same instructions as the P3, but does not execute them

nearly as fast.  This is true for all apps, not just dnetc. 

A P4 optimized core is in the works.  Until then, the P3 core is as good as it

gets.
__
Bruce Wilson, Manager, FERS Business Services
bwilson at fers.com, 312.245.1750, http://www.fers.com/
PGP KeyID: 5430B995, http://www.lasthome.net/~bwilson/

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	rc5 at lists.distributed.net 
	
	06/10/2001 20:41 
		        
		        To:        rc5 at lists.distributed.net 
		        cc:        (bcc: Bruce Wilson/Chicago/MP/RSMi) 
		        Subject:        [RC5] P4 Speed Question




After unpacking my new Dell Dimension 8100 with a P4 at 1.7ghz , I was
expecting a SUPER increase (at least double) over my P3 500 overclocked to 620.



However, I am quite disapointed. It seems that Dnet is not optimized for P4 or
something, because the 620mhz P3 can do approx 1,677,500 keys a second, but
the
P4 at 1700mhz can only do approx 2,313,000 per second. This is a HUGE
disapointment. Is there anything I can do to improve this, or am I stuck
waiting for a new version? 

Also, the P4 is supposed to have the full P3 instruction set, right (plus
some). Why isnt the keys/sec nearly triple (like the mhz is)? Even if the P4
was acting like a P3, its still doing it nearly 3 times faster. 

Thanks 

Greg 




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<DIV><FONT face=Arial size=2>After unpacking my new Dell Dimension 8100 with a

P4 at 1.7ghz , I was expecting a SUPER increase (at least double) over my P3 
500 
overclocked to 620. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>However, I am quite disapointed. It seems that 
Dnet 
is not optimized for P4 or something, because the 620mhz P3 can do approx 
1,677,500 keys a second, but the P4 at 1700mhz can only do approx 2,313,000 per

second. This is a HUGE disapointment. Is there anything I can do to improve 
this, or am I stuck waiting for a new version?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Also, the P4 is supposed to have the full P3 
instruction set, right (plus some). Why isnt the keys/sec nearly triple (like 
the mhz is)? Even if the P4 was acting like a P3, its still doing it nearly 3 
times faster.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Thanks</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Greg</FONT></DIV>
<DIV>&nbsp;</DIV></BODY></HTML> 




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