Attention PRP Testers (with SSE2 non-P4 machines)

axn · 2006-10-11, 19:58

If you are running LLRNet or manual PRP using a non-P4 SSE2 machine (Athlon64, Opteron, Petium M, Core *), could you try adding the following line to your llr.ini:

Code:

CPUSupportsSSE2=0

You need to restart LLRNet/LLR/PRP after making the change. Please let me know if you see any improvement in the iteration times.

* I don't know about Core 2. If anyone has Core 2 and willing to do the test, please let me know how that works out.

em99010pepe · 2006-10-11, 20:18

For me it's worst on an AMD64 3000+. From 3.3 ms/it to 3.9 ms/it.

Carlos

michaf · 2006-10-11, 20:49

For Athlon-64 X2 3800+: from 3.4 to 4.3 mseconds per iteration

Kosmaj · 2006-10-11, 21:44

This way your are disabling SSE2 code. Why do you expect to gain any speed

Xentar · 2006-10-11, 22:25

Core 2 E6600
Iteration time before: 1.5 ms
Iteration time after: 2.9ms

not really good ;)
as Kosmaj asked: Why would you expect an improvement, when you disable some optimizations?

arminius · 2006-10-12, 05:08

AMD 64 3700+
before: 3,092 ms
after: 3,567 ms

a.

2006-10-11, 19:58	#1
axn Jun 2003 2×7×17×23 Posts	Attention PRP Testers (with SSE2 non-P4 machines) If you are running LLRNet or manual PRP using a non-P4 SSE2 machine (Athlon64, Opteron, Petium M, Core ), could you try adding the following line to your llr.ini: Code: CPUSupportsSSE2=0 You need to restart LLRNet/LLR/PRP after making the change. Please let me know if you see any improvement in the iteration times. I don't know about Core 2. If anyone has Core 2 and willing to do the test, please let me know how that works out.

2006-10-11, 20:18	#2
em99010pepe Sep 2004 2·5·283 Posts	For me it's worst on an AMD64 3000+. From 3.3 ms/it to 3.9 ms/it. Carlos Last fiddled with by em99010pepe on 2006-10-11 at 20:18

2006-10-11, 22:25	#5
Xentar Sep 2006 Germany 2×5×19 Posts	Core 2 E6600 Iteration time before: 1.5 ms Iteration time after: 2.9ms not really good ;) as Kosmaj asked: Why would you expect an improvement, when you disable some optimizations? Last fiddled with by Xentar on 2006-10-11 at 22:29

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2006-10-11, 20:49	#3
michaf Jan 2005 479₁₀ Posts	For Athlon-64 X2 3800+: from 3.4 to 4.3 mseconds per iteration

2006-10-11, 21:44	#4
Kosmaj Nov 2003 2×1,811 Posts	This way your are disabling SSE2 code. Why do you expect to gain any speed

2006-10-12, 05:08	#6
arminius Sep 2006 Germany 76₁₆ Posts	AMD 64 3700+ before: 3,092 ms after: 3,567 ms a.