Sv: [erlang-questions] crypto:hmac/3 using hardware acceleration

Hans Nilsson R hans.r.nilsson@REDACTED
Thu Feb 20 13:15:01 CET 2020

Well, it isn't super clear in the release notes, so it is not strange you didn't know it.

I'm VERY interested in the results of your benchmarking!

Från: Ben Browitt <ben.browitt@REDACTED>
Skickat: den 19 februari 2020 18:14
Till: Hans Nilsson R <hans.r.nilsson@REDACTED>
Kopia: zxq9@REDACTED <zxq9@REDACTED>; erlang-questions@REDACTED <erlang-questions@REDACTED>
Ämne: Re: [erlang-questions] crypto:hmac/3 using hardware acceleration

Thank you Hans, that's great.
I probably missed it in the release notes.
I'll benchmark and compare hmac on a server with and without sha hardware accelerations.

On Wed, Feb 19, 2020 at 5:18 PM Hans Nilsson R <hans.r.nilsson@REDACTED<mailto:hans.r.nilsson@REDACTED>> wrote:
Crypto uses the EVP interfase for hash and mac (as well ass ciphers) with some conditions:

Since OTP-22.1:
The hash functions in crypto (hash,/2, hash_init/1, hash_update/2 and hash_final/1) use the EVP interface if the underlying cryptolib is OpenSSL 1.0.0 or higher.

Since OTP-22.1.3:
The mac functions (mac, macN, mac_init, mac_update, mac_final and mac_finalN) use the EVP interface if the underlying cryptolib is OpenSSL 1.1.1 or higher.

Från: erlang-questions <erlang-questions-bounces@REDACTED<mailto:erlang-questions-bounces@REDACTED>> för Ben Browitt <ben.browitt@REDACTED<mailto:ben.browitt@REDACTED>>
Skickat: den 18 februari 2020 17:55
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Ämne: Re: [erlang-questions] crypto:hmac/3 using hardware acceleration

AWS [1] and GCP [2] provide AMD EPYC servers  with SHA hardware accelerations.
Intel Ice Lake servers will also have SHA hardware accelerations [3].
Is there a chance OTP 23 could use EVP for SHA? This will give a large performance boost.


On Wed, May 8, 2019 at 4:34 PM <zxq9@REDACTED<mailto:zxq9@REDACTED>> wrote:
On 2019年5月8日水曜日 14時15分51秒 JST Ben Browitt wrote:
> I've tested the speed with and without evp. evp is slower because Intel
> cpus don't have hardware acceleration for sha.
> So it's best to leave it without evp for now. Thanks.
> openssl speed sha1
> openssl speed -evp sha1

I think it depends on how your openssl was built and which processor
family you have. IIRC Intel has SHA1 hardware support, and AMD has
SHA1 and SHA256 hardware instructions since RyZen.

May also depend on if you are running virtualized and whether the
hypervisor is exposing the instructions.

In the base case I imagine it would "just work", but not if this is
disabled in a vanilla Linux/BSD/whatever distribution binary, or if
your system is set to a mode that restricts some instructions.

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