On 01/12/2014 05:44 PM, Joonsoo Kim wrote: > We only touch one struct page on small allocation. > In 64-byte case, we always use one cacheline for touching struct page, since > it is aligned to cacheline size. However, in 56-byte case, we possibly use > two cachelines because struct page isn't aligned to cacheline size.
I think you're completely correct that this can _happen_, but I'm a bit unconvinced that what you're talking about is the thing which dominates the results. I'm sure it plays a role, but the tests I was doing were doing tens of millions of allocations and touching a _lot_ of 'struct pages'. I would not expect these effects to be observable across such a large sample of pages. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
