Re: [tor-relays] HardwareAccel: Current proper use???

[usprey <usprey@xxxxxxxxx>]

On 3 January 2015 at 13:56, Sebastian Urbach <sebastian@xxxxxxxxxx> wrote:
> On January 3, 2015 10:41:42 AM usprey <usprey@xxxxxxxxx> wrote:
>
> Hi usprey,
>
>> Summary:
>> The documentation is still somewhat vague on the best use of the
>> "HardwareAccel" option.
>>
>> > *HardwareAccel* *0*|*1*
>
>
> The docu is not exactly a high-performance howto :-)

np, would just like to elaborate this option in the manual for people
not fluent in OpenSSL.

>
>> >
>> > If non-zero, try to use built-in (static) crypto hardware acceleration
>> > when available. (Default: 0)
>> >
>> I could not find a definitive answer in the archives or in
>>
>> https://gitweb.torproject.org/tor.git/log/?qt=grep&q=hardwareaccel&showmsg=1
>> .
>>
>> https://www.torservers.net/wiki/setup/server#aes-ni_crypto_acceleration
>> claims
>> no intervention is needed in regards of aes-ni accelaration, but I would
>> like to add an explanation or source to this recommendation.
>>
>> Question_1:
>> If my CPU supports and have loaded aesni_intel on linux with OpenSSL is
>> 1.0.1.j-1, should I leave HardwareAccel off or explicitly enable it?
>
>
> You don't have to change anything with 1.0.1.j-1, leave the default.
>
>>
>> Question_2:
>> What does "*built-in (static) crypto hardware acceleration*" refer to?
>> Dedicated hardware, CPU-support or...?
>
>
> It specifically means that you have the aes_ni cpu capabilities / flag. I
> have seen this flag on dedicated systems and also on vps systems as well. If
> the cpu / bios provides the flag and all other requirements are met (as
> stated in the torservers.net docu) you can use that feature on any system.

k, ty, will venture into OpenSSL docs.

>
> I would very much appreciate it if you would switch to text mail format,
> thanks.

k, is that the preferred default on these lists?

>
> Thank you very much for running a relay !
>
>>
>> Best regards
>>
>>
>>
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>
>
> --
> Sincerely yours / SincÃres salutations
>
> Sebastian Urbach
>
> -----------------------------------------
> Definition of Tor:
> 10% luck, 20% skill, 15% concentrated
> power of will, 5% pleasure, 50% pain and
> 100% reason to remember the name!
> -----------------------------------------
>
>
>
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