On Tue, Sep 03, 2013 at 02:15:42PM +0000, Christoph Lameter wrote: > On Mon, 2 Sep 2013, Joonsoo Kim wrote: > > > This patchset implements byte sized indexes for the freelist of a slab. > > > > Currently, the freelist of a slab consist of unsigned int sized indexes. > > Most of slabs have less number of objects than 256, so much space is wasted. > > To reduce this overhead, this patchset implements byte sized indexes for > > the freelist of a slab. With it, we can save 3 bytes for each objects. > > > > This introduce one likely branch to functions used for setting/getting > > objects to/from the freelist, but we may get more benefits from > > this change. > > > > Below is some numbers of 'cat /proc/slabinfo' related to my previous posting > > and this patchset. > > You may also want to run some performance tests. The cache footprint > should also be reduced with this patchset and therefore performance should > be better. Yes, I did a hackbench test today, but I'm not ready for posting it. The performance is improved for my previous posting and futher improvement is founded by this patchset. Perhaps I will post it tomorrow. Thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>