Matthias-Christian Ott <ott@xxxxxxxxx> wrote: > I did some experiments with af_alg and noticed that to be really > useful, it should indicate whether a certain algorithm is hardware > accelerated. I guess this has to be inferred by the priority of the > algorithm could be made available via a read-only socket option. Any > thoughts on this? > > I can imagine, an alternative approach and perhaps better approach > would be to measure the speed of the kernel provided algorithm against > a software implementation, but there are many other factors that could > influence the results. Therefore, it is perhaps better to just make > the assumption that hardware acceleration is faster which is made in > the kernel anyhow. You have to be careful to distinguish between hardware acceleration that is directly available to user-space (such as AESNI) and those that aren't. For the former it makes zero sense to go through the kernel as you'll only make it slower. The latter case is the reason why this interface exists. Cheers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
