Messages in this thread |  | | From | Luke Yang <> | | Date | Thu, 2 Apr 2026 09:55:11 -0400 | | Subject | Re: [PATCH v2 0/2] mm/mprotect: micro-optimization work |
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On Wed, Apr 1, 2026 at 10:11 AM Pedro Falcato <pfalcato@suse.de> wrote: > > On Mon, Mar 30, 2026 at 03:55:51PM -0400, Luke Yang wrote: > > Hi Pedro, > > > > Thanks for working on this. I just wanted to share that we've created a > > test kernel with your patches and tested on the following CPUs: > > > > --- aarch64 --- > > Ampere Altra > > Ampere Altra Max > > > > --- x86_64 --- > > AMD EPYC 7713 > > AMD EPYC 7351 > > AMD EPYC 7542 > > AMD EPYC 7573X > > AMD EPYC 7702 > > AMD EPYC 9754 > > Intel Xeon Gold 6126 > > Into Xeon Gold 6330 > > Intel Xeon Gold 6530 > > Intel Xeon Platinum 8351N > > Intel Core i7-6820HQ > > > > --- ppc64le --- > > IBM Power 10 > > > > On average, we see improvements ranging from a minimum of 5% to a > > maximum of 55%, with most improvements showing around a 25% speed up in > > the libmicro/mprot_tw4m micro benchmark. > > Nice! Thanks for the tests. I'm wondering, what CPU saw 5% and what CPU > saw 55%? Or was it just inter-run variance? > > -- > Pedro >
5% -> Ampere Altra Max 55% -> Ampere Altra
Personally, I can't conclude at the moment if this is just inter-run variance. However, let me re-run the tests a few times on these two machines to see if this is consistent.
Luke
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