lkml.org 
[lkml]   [2016]   [Apr]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [PATCH 06/28] mm, page_alloc: Use __dec_zone_state for order-0 page allocation
    From
    Date
    On 04/15/2016 10:58 AM, Mel Gorman wrote:
    > __dec_zone_state is cheaper to use for removing an order-0 page as it
    > has fewer conditions to check.
    >
    > The performance difference on a page allocator microbenchmark is;
    >
    > 4.6.0-rc2 4.6.0-rc2
    > optiter-v1r20 decstat-v1r20
    > Min alloc-odr0-1 382.00 ( 0.00%) 381.00 ( 0.26%)
    > Min alloc-odr0-2 282.00 ( 0.00%) 275.00 ( 2.48%)
    > Min alloc-odr0-4 233.00 ( 0.00%) 229.00 ( 1.72%)
    > Min alloc-odr0-8 203.00 ( 0.00%) 199.00 ( 1.97%)
    > Min alloc-odr0-16 188.00 ( 0.00%) 186.00 ( 1.06%)
    > Min alloc-odr0-32 182.00 ( 0.00%) 179.00 ( 1.65%)
    > Min alloc-odr0-64 177.00 ( 0.00%) 174.00 ( 1.69%)
    > Min alloc-odr0-128 175.00 ( 0.00%) 172.00 ( 1.71%)
    > Min alloc-odr0-256 184.00 ( 0.00%) 181.00 ( 1.63%)
    > Min alloc-odr0-512 197.00 ( 0.00%) 193.00 ( 2.03%)
    > Min alloc-odr0-1024 203.00 ( 0.00%) 201.00 ( 0.99%)
    > Min alloc-odr0-2048 209.00 ( 0.00%) 206.00 ( 1.44%)
    > Min alloc-odr0-4096 214.00 ( 0.00%) 212.00 ( 0.93%)
    > Min alloc-odr0-8192 218.00 ( 0.00%) 215.00 ( 1.38%)
    > Min alloc-odr0-16384 219.00 ( 0.00%) 216.00 ( 1.37%)
    >
    > Signed-off-by: Mel Gorman <mgorman@techsingularity.net>

    Acked-by: Vlastimil Babka <vbabka@suse.cz>

    \
     
     \ /
      Last update: 2016-04-26 13:41    [W:4.103 / U:0.012 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site