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-   -   AMD Phenom II cache influence (https://www.mersenneforum.org/showthread.php?t=12014)

kaeptn_kork 2009-06-09 23:42

AMD Phenom II cache influence
 
Hi,

does anyone already got some data on the influence of L3 cache size (2M/6M/8M) on p95 iteration times for the AMD Phenom2 architecture?

RMAC9.5 2009-06-10 05:01

AFAIK, George has not added any code to Prime95 Version 25.9 which takes advantage of the L3 cache to increase performance. Prime95 version 25.9 build 4 recognizes the L3 cache, but does not take advantage of it yet.

lfm 2009-06-10 06:56

[QUOTE=kaeptn_kork;176854]Hi,

does anyone already got some data on the influence of L3 cache size (2M/6M/8M) on p95 iteration times for the AMD Phenom2 architecture?[/QUOTE]

There is lots of data already in the benchmarks. You might be able to see an answer there.

kaeptn_kork 2009-06-10 22:32

[QUOTE=lfm;176879]There is lots of data already in the benchmarks. You might be able to see an answer there.[/QUOTE]

There is indeed, unfortunately there's a huge spread which makes general statements difficult. One of the reasons is the lack of indication of the software version.

[QUOTE=RMAC9.5;176871]AFAIK, George has not added any code to Prime95 Version 25.9 which takes advantage of the L3 cache to increase performance. Prime95 version 25.9 build 4 recognizes the L3 cache, but does not take advantage of it yet.[/QUOTE]

OK... didn't expect that, makes it easier :smile:


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