On 12/20/18 11:21 AM, Christoph Lameter wrote:
> To test apply this patchset and run a workload that uses lots of radix tree
> objects
>
>
> Then go to
>
> /sys/kernel/slab/radix_tree_node
>
> Inspect the number of total objects that the slab can handle
>
> cat total_objects
cat objects # ???
(as below) (just checking :)
>
> qmdr:/sys/kernel/slab/radix_tree_node# cat objects
> 868 N0=448 N1=168 N2=56 N3=196
>
> And the number of slab pages used for those
>
> cat slabs
>
> qmdr:/sys/kernel/slab/radix_tree_node# cat slabs
> 31 N0=16 N1=6 N2=2 N3=7
>
>
> Perform a cache shrink operation
>
> echo 1 >shrink
>
>
> Now see how the slab has changed:
>
> qmdr:/sys/kernel/slab/radix_tree_node# cat slabs
> 30 N0=15 N1=6 N2=2 N3=7
> qmdr:/sys/kernel/slab/radix_tree_node# cat objects
> 713 N0=349 N1=141 N2=52 N3=171
--
~Randy
