Re: [RFC v2 PATCH 0/16] Optimize this_cpu_*() ops for non-x86 (ARM64 for this series)
"David Hildenbrand (Arm)" <[email protected]>
| Newsgroups | org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-kernel,org.kvack.linux-mm |
|---|---|
| Message-ID | <[email protected]> |
>> The LSF session was not encouraging ([2]) and as an mm maintainer I'm not at all >> happy with this myself, nor does the arm64 community seem all that enthused so I >> would against gently suggest to Christoph to be a little more open-minded about >> the the proposed alternative which he seems to have dismissed out of hand. > > Nobody disagreed Mark's approach also achieved good result, we just thought the > series can do better. Okay, you thought it can do better. Did you only think that or did you measure it? The cover letter obviously only compares to upstream Linux, not to Mark's series. Are there performance results I am missing that directly show that the additional instructions have an actual measurable performance impact? That's really all we are asking for. If there is a measurable performance difference, great. Share the results or point us at them if we missed them. -- Cheers, David