Messages in this thread | | | Date | Wed, 10 May 2017 11:20:59 -0400 (EDT) | Subject | Re: [v3 0/9] parallelized "struct page" zeroing | From | David Miller <> |
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From: Pasha Tatashin <pasha.tatashin@oracle.com> Date: Wed, 10 May 2017 11:01:40 -0400
> Perhaps you are right, and I will measure on x86. But, I suspect hit > can become unacceptable on some platfoms: there is an overhead of > calling a function, even if it is leaf-optimized, and there is an > overhead in memset() to check for alignments of size and address, > types of setting (zeroing vs. non-zeroing), etc., that adds up > quickly.
Another source of overhead on the sparc64 side is that we much do memory barriers around the block initializiing stores. So batching calls to memset() amortize that as well.
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