Dmitry Kasatkin <dmitry.kasat...@gmail.com> wrote: > Hi, > > ahash allows to use HW acceleration, but usually it comes at a cost of > additional HW related configuration overhead, such as configuring hash > module, DMA, etc. For that reason hashing small chucks of data is > faster doing it with shash (CPU) rather than HW acceleration. > > I measured long time ago on omap-sham driver but cannot recall any data. > > Does anyone have any experience under what data size it is still > better to use shash?
It's going to be hardware-specific. It'll also depend on whether you're coming from user-space or not as that would entail a bigger per-request overhead, meaning that you need more data to break even. Cheers, -- Email: Herbert Xu <herb...@gondor.apana.org.au> 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 majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
