Maamoun TK <maamoun...@googlemail.com> writes: > On Mon, Nov 30, 2020 at 11:18 PM Maamoun TK <maamoun...@googlemail.com> > wrote: > >> on POWER9 I get the following benchmark with ". /configure >> --enable-power-altivec": >> >> chacha encrypt 763.57 >> chacha decrypt 780.64 >> >> regards, >> Mamone >> > > I got this result using ppc-chacha-2core branch on same machine: > > chacha encrypt 565.79 > chacha decrypt 582.10
I've tried running the benchmark on gcc135, and that gives me much more consistent values than gcc112. The 2-way code (currently on master branch) gives 686 Mbyte/2. The 4-way code you tried gives 958 MByte/s. I then replaced the innerloop with a versino with better interleaving, written by Torbjörn Granlund (just pushed to the branch). That gives 1225 Mbyte/s. And for reference, the plain C implementation gives 363 MByte/s. Regards, /Niels -- Niels Möller. PGP-encrypted email is preferred. Keyid 368C6677. Internet email is subject to wholesale government surveillance. _______________________________________________ nettle-bugs mailing list nettle-bugs@lists.lysator.liu.se http://lists.lysator.liu.se/mailman/listinfo/nettle-bugs
