Messages in this thread | | | Subject | Re: [PATCH] mm: page_alloc: High-order per-cpu page allocator v7 | From | Eric Dumazet <> | Date | Wed, 07 Dec 2016 11:00:49 -0800 |
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On Wed, 2016-12-07 at 10:12 +0000, Mel Gorman wrote:
> This is the result from netperf running UDP_STREAM on localhost. It was > selected on the basis that it is slab-intensive and has been the subject > of previous SLAB vs SLUB comparisons with the caveat that this is not > testing between two physical hosts. >
Interesting results.
netperf UDP_STREAM is not really slab intensive : (for large sendsizes like 16KB)
Bulk of the storage should be allocated from alloc_skb_with_frags(), ie using pages.
And I am not sure we enabled high order pages in this path ?
ip_make_skb() __ip_append_data() sock_alloc_send_skb() sock_alloc_send_pskb (..., max_page_order=0) alloc_skb_with_frags ( max_page_order=0) So far, I believe net/unix/af_unix.c uses PAGE_ALLOC_COSTLY_ORDER as max_order, but UDP does not do that yet.
We probably could enable high-order pages there, if we believe this is okay.
Or maybe I missed and this already happened ? ;)
Thanks.
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