On 3 January 2015 at 12:36, grarpamp <grarpamp@gmail.com> wrote:
On Sat, Jan 3, 2015 at 3:53 AM, usprey <usprey@gmail.com> wrote:
> I would like to give a worthy mention about price/performance of modern AMD
> CPUs.
>
> My current highest observed peak on a $400 AMD (w/o rackcase) machine is
> 370Mbps running one tor process with two threads.

What cpu model and cpu load percentages at what bandwidth?
 
A8-5600K bought for a cheap private server 1,5 years ago https://en.wikipedia.org/wiki/List_of_AMD_accelerated_processing_unit_microprocessors#Virgo:_.22Trinity.22_.282012.2C_32_nm.29

I can set up system stats if you want proper figures, but far from full load with 250Mbps average bidirectional traffic.


The AMD's seem nice if you don't pay for watts, want ATI opencl
GPU performance on die, can utilize their cmt setup better
than htt, or just want a decent cheap cpu (which could indeed be
interesting to evaluate for lower bandwidth like this 370Mbps).
 
I currently have free hosting for this machine, so power and traffic not an issue. I expect the kernel to handle the rest. ;)


AMD's fastest processor seems the fx-9590 4 modules 4.7ghz 220w $230.
Under full load, my guess is the i7-5820k is about 26% faster for $155
more, which you'd make back saving watts in 2.25 years.

Good point, if your not on a budget and building a private relay. Power prices also vary a lot between countries and regions. 


I don't know how much Tor benefits from SMT, or how Intel HTT vs
AMD CMT compares (very few reviews bother to properly test SMT).

No idea, should this not be more dependant on the OS?
 
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