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pjp
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 Posted: Mon Oct 24, 2011 12:33 pm Post subject: |
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| Shining Arcanine wrote: | I looked into the processors used by Phoronix and it seems that Michael biased the review toward AMD by excluding Sandy Bridge processors that lack SMT, which is what makes Bulldozer look competitive.
You could say that Phoronix compared things in the same price range, but those Gulftown processors are far more expensive than Sandy Bridge processors with SMT support and the Core i7-2600 only costs $20 more: |
Maybe it was just what he had available. A performance "reference."
Given the architecture difference, no comparison seems truly accurate. Price & performance would probably be best, but it isn't really demonstrating what the hardware can do. Perhaps the AMD 8-core vs. Intel 4/6 core processors. Or where an AMD & Intel processor are performance competitive, then look at price/performance to see who wins.
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pigeon768
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| Posted: Mon Oct 24, 2011 1:14 pm Post subject: |
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Honestly, we're not going to get decent benchmarks for a while. Like, months from now.
The good news for Gentoo users is that Bulldozer has some instructions that Intel chips don't, like FMA and XOP. Utilizing this will be easy for us, but many other distros won't have it available.
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Shining Arcanine
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| Posted: Mon Oct 24, 2011 9:30 pm Post subject: |
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| pigeon768 wrote: | Honestly, we're not going to get decent benchmarks for a while. Like, months from now.
The good news for Gentoo users is that Bulldozer has some instructions that Intel chips don't, like FMA and XOP. Utilizing this will be easy for us, but many other distros won't have it available. |
That is the only reason why I haven't jumped on a Phenom II X6 upgrade after seeing the bulldozer benchmarks. I keep thinking about the new instructions and feel that even though AMD botched things badly, I might be better off with Bulldozer for the stuff I run. If I undervolt it, I might be able to make the power consumption reasonable.
In other news, I found out that my university's computer science department has some old SGI systems holding down floor tiles in the department. I am thinking of saving them from obscurity and installing Gentoo on them.  |
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drizek
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| Posted: Mon Oct 24, 2011 9:39 pm Post subject: |
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The problem is that Bulldozer is out of stock, which means the Supply:Demand dealie won't really do much to lower prices. I would prefer it over a Phenom II myself, but the price is high and will remain high.
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jdmulloy
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| Posted: Mon Oct 24, 2011 9:45 pm Post subject: |
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Since I already have a Phenom II X6 after seeing the benchmarks between the Phenoms and Bulldozer I don't think it's worth upgrading. It's just not enough of an improvement over the previous generation to make it worth upgrading.
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pjp
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| Posted: Mon Oct 24, 2011 10:46 pm Post subject: |
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| drizek wrote: | | The problem is that Bulldozer is out of stock, which means the Supply:Demand dealie won't really do much to lower prices. I would prefer it over a Phenom II myself, but the price is high and will remain high. |
Is there something specific you see to make it better than reviews are suggesting?
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drizek
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| Posted: Mon Oct 24, 2011 11:06 pm Post subject: |
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| pjp wrote: | | drizek wrote: | | The problem is that Bulldozer is out of stock, which means the Supply:Demand dealie won't really do much to lower prices. I would prefer it over a Phenom II myself, but the price is high and will remain high. |
Is there something specific you see to make it better than reviews are suggesting? |
I want to encrypt my drives, and Bulldozer has hardware accelerated AES that makes it several orders of magnitude faster than Phenom. Otherwise, they are both more or less overkill for my needs anyway.
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pjp
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| Posted: Tue Oct 25, 2011 1:21 am Post subject: |
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Cool. I've recently started looking into encrypting a file system, but haven't made it very far. I'm testing it in a VM on a laptop, so IIRC, I think I need to set aside a significant block of time to let it complete.
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Ant P.
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| Posted: Tue Oct 25, 2011 1:31 am Post subject: |
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| Is that AES256? I hope they didn't just copy+paste the crappy Geode AES128 over. |
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EatMeerkats
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Shining Arcanine
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| Posted: Tue Oct 25, 2011 3:07 am Post subject: |
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| drizek wrote: | | pjp wrote: | | drizek wrote: | | The problem is that Bulldozer is out of stock, which means the Supply:Demand dealie won't really do much to lower prices. I would prefer it over a Phenom II myself, but the price is high and will remain high. |
Is there something specific you see to make it better than reviews are suggesting? |
I want to encrypt my drives, and Bulldozer has hardware accelerated AES that makes it several orders of magnitude faster than Phenom. Otherwise, they are both more or less overkill for my needs anyway. |
OpenSSL doesn't support AES-NI yet. There is a patch available, but it isn't in portage. |
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drizek
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| Posted: Tue Oct 25, 2011 3:14 am Post subject: |
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| Shining Arcanine wrote: | | drizek wrote: | | pjp wrote: | | drizek wrote: | | The problem is that Bulldozer is out of stock, which means the Supply:Demand dealie won't really do much to lower prices. I would prefer it over a Phenom II myself, but the price is high and will remain high. |
Is there something specific you see to make it better than reviews are suggesting? |
I want to encrypt my drives, and Bulldozer has hardware accelerated AES that makes it several orders of magnitude faster than Phenom. Otherwise, they are both more or less overkill for my needs anyway. |
OpenSSL doesn't support AES-NI yet. |
No, but BitLocker does.
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EatMeerkats
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| Posted: Tue Oct 25, 2011 3:33 am Post subject: |
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| drizek wrote: | | Shining Arcanine wrote: | | drizek wrote: | | pjp wrote: | | drizek wrote: | | The problem is that Bulldozer is out of stock, which means the Supply:Demand dealie won't really do much to lower prices. I would prefer it over a Phenom II myself, but the price is high and will remain high. |
Is there something specific you see to make it better than reviews are suggesting? |
I want to encrypt my drives, and Bulldozer has hardware accelerated AES that makes it several orders of magnitude faster than Phenom. Otherwise, they are both more or less overkill for my needs anyway. |
OpenSSL doesn't support AES-NI yet. |
No, but BitLocker does.
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As does the kernel's cryptographic API, which is what most disk encryption solutions on linux use:
CONFIG_CRYPTO_AES_NI_INTEL:
Use Intel AES-NI instructions for AES algorithm. |
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Shining Arcanine
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| Posted: Tue Oct 25, 2011 3:51 am Post subject: |
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| EatMeerkats wrote: | | drizek wrote: | | Shining Arcanine wrote: | | drizek wrote: | | pjp wrote: | | drizek wrote: | | The problem is that Bulldozer is out of stock, which means the Supply:Demand dealie won't really do much to lower prices. I would prefer it over a Phenom II myself, but the price is high and will remain high. |
Is there something specific you see to make it better than reviews are suggesting? |
I want to encrypt my drives, and Bulldozer has hardware accelerated AES that makes it several orders of magnitude faster than Phenom. Otherwise, they are both more or less overkill for my needs anyway. |
OpenSSL doesn't support AES-NI yet. |
No, but BitLocker does.
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As does the kernel's cryptographic API, which is what most disk encryption solutions on linux use:
CONFIG_CRYPTO_AES_NI_INTEL:
Use Intel AES-NI instructions for AES algorithm. |
OpenVPN uses OpenSSL and the performance is bad on Sandy Bridge. My AMD Phenom II X2 555 can benchmark "openssl speed aes-256-cbc" more than two times faster. I assume that is because it is not using hand written assembly, but still, I would like to see performance improve. |
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Ulukay
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| Posted: Sat Nov 05, 2011 10:56 pm Post subject: |
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| EatMeerkats wrote: | As does the kernel's cryptographic API, which is what most disk encryption solutions on linux use:
CONFIG_CRYPTO_AES_NI_INTEL:
Use Intel AES-NI instructions for AES algorithm. |
AES_NI_INTEL does support Bulldozer?
don't think so, have seen no improvements on my machine.
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pigeon768
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| Posted: Mon Nov 07, 2011 8:23 pm Post subject: |
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| Ulukay wrote: | | EatMeerkats wrote: | As does the kernel's cryptographic API, which is what most disk encryption solutions on linux use:
CONFIG_CRYPTO_AES_NI_INTEL:
Use Intel AES-NI instructions for AES algorithm. |
AES_NI_INTEL does support Bulldozer?
don't think so, have seen no improvements on my machine. |
Bulldozer supports the AES instruction. ('grep aes /proc/cpuinfo')
I do not know if the kernel or openssl fully support it yet though.
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tnt
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| Posted: Mon Apr 09, 2012 12:56 pm Post subject: |
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Any news about OpenSSL and AES-NI support ?
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