lkml.org 
[lkml]   [2007]   [May]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [rfc] increase struct page size?!
    On Sun, 20 May 2007, Nick Piggin wrote:

    > I _am_ considering the average case, and I consider the aligned structure
    > is likely to win on average :) I just don't have numbers for it yet.

    I'd be glad too if you could get some numbers. I did some benchmarking a
    few weeks ago on x86_64 and I found only a very minimal performance drop
    if the calculation was simplified.

    Note also that a smaller structure means that more page structs can be
    covered by a certain amount of cachelines. Doing the alignment may cause
    more cacheline misses.

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2007-05-21 19:09    [W:2.109 / U:0.684 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site