Disappointing AMD 64 SETI Speeds

Forum CPU & Components : CPUs Disappointing AMD 64 SETI Speeds

Anyone run 64-bit SETI on a 64-bit OS? I gave it a shot and was quite disappointed.

I’m running an Athlon 64 3200+ under SUSE Linux 64-bit.
I’ve loaded the x86_64 version of SETI and have it running from the command line.
It’s completed 18% in the last hour! At that rate it will take over 5 hours to complete one unit! Just to give you an idea, an Athlon XP 2400+ running 32-bit Linux completes a unit in about 3 hours. This same Athlon 64 computer running standard 32-bit Windows completes a unit in about two hours.

What’s up with the Athlon 64, running 64-bit code?

Reply to ChrisLudwig

It doesn't have anything to do with the A64 but with the Seti prog or Linux. Or maybe you get bigger WU in 64bit mode, dunno.

Reply to tweebel

I don't know why it's so much worse, but I can tell you why it's not any better. SETI doesn't have a 64 bit optimized version out right now. So software wise, your 64 bit OS is running a 32 bit program. Think running a program written for a 486 under Win95. It still shouldn't crush performance that bad, but maybe it does-dual boot for you?

Mobile P4 1.6 @ 2.4 - Gigabyte 8ipe-1000 Pro - 4x256 Corsair Value PC3200 - MSI 128 MB 9800Pro @ 435/730 - 80Gb WD 8Mb Cache -

Reply to justaguy

Hey Chris are you folding for us ???.. Team 40051
<A HREF="http://folding.stanford.edu" target="_new">Folding@home</A>

Check out the thread in the cpu section.

The loving are the daring!

Reply to Flinx

No, I'm going to run SETI a bit longer. I'm going for the 25,000 mark. I'm ranked 7486th out of the 5.3million+ so far. I'm now geekishly obsessed with my stats!

Reply to ChrisLudwig

Isn't: x86_64-pc-linux-gnu, the 64-bit opt version?

Reply to ChrisLudwig

From what I read, the x86-64 version is a straight compile from C, where as the 32 bit clients have been hand tuned. I've seen some tests somewhere sometime where they compared C compiled Seti clients in 32 and 64 bit mode, and the 64 bit one was like 10% faster. 10% is nothing compared to what hand tuning can do. Until someone builds a better 64 bit client, I'm afraid you're out of luck.

= The views stated herein are my personal views, and not necessarily the views of my wife. =

Reply to P4Man

Do you crunch for a seti team at all?

s signature has been formatted to fit your scr

Reply to silverpig

Ya, it's a group for my website. I'm the only one with serious numbers though...
http://setiathome2.ssl.berkeley.ed [...] 13209.html

Reply to ChrisLudwig

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