[tor-relays] Sharing experience with Via Nano 1.6ghz with Padlock hw accel

[fatal]

Hello,

openssl with enabled padlock and tor stable crashes on my via nano
servers running linux and freebsd.

without padlock max is ~81 Mbit with linux and ~76 with freebsd (100%
load, measured in the last week).


On 05.06.2016 17:22, Roman Mamedov wrote:
> On Sun, 5 Jun 2016 17:01:29 +0200
> "Fabio Pietrosanti (naif) - lists" <lists at infosecurity.ch> wrote:
> 
>>> Do you mean 60 Mbit? If so, then that's a very good result for only 30% CPU.
>>
>> It means that the padlock is doing it's job in making crypto  acceleration.
> 
> Without padlock I am seeing about 50% CPU use with 25 Mbit in + 25 Mbit out.
> 
>>>> There's a way to measure the uses of the hw acceleration given by the
>>>> Via Padlock, if it's at 10% of it's capacity or 100% ?
>>>
>>> There is no way, the only hint you have is the general CPU load.
>>
>>
>> That's the point, i want to measure how the padlock hw accel is
>> performing, to understand if it does hit it's limits or not.
>>
>> I think that we need to find a way
> 
> It is not a separate accelerator device with its own throughput limits, it's
> just a set of additional instructions in the CPU. Hence as long as you see CPU
> load less than 100%, then no "limit" has been hit. Or if you see 100% CPU use,
> then there's your answer, even with the padlock support it is now saturated.
> 
> 
> 
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