Re: Higher slub memory consumption on 64K page-size systems?

2020-11-11 Thread Bharata B Rao
On Thu, Nov 05, 2020 at 05:47:03PM +0100, Vlastimil Babka wrote: > On 10/28/20 6:50 AM, Bharata B Rao wrote: > > slub_max_order > > -- > > The most promising tunable that shows consistent reduction in slab memory > > is slub_max_order. Here is a table that shows the number of slabs

Re: Higher slub memory consumption on 64K page-size systems?

2020-11-05 Thread Vlastimil Babka
On 10/28/20 6:50 AM, Bharata B Rao wrote: slub_max_order -- The most promising tunable that shows consistent reduction in slab memory is slub_max_order. Here is a table that shows the number of slabs that end up with different orders and the total slab consumption at boot for

Re: Higher slub memory consumption on 64K page-size systems?

2020-11-02 Thread Bharata B Rao
On Wed, Oct 28, 2020 at 05:07:57PM -0700, Roman Gushchin wrote: > On Wed, Oct 28, 2020 at 11:20:30AM +0530, Bharata B Rao wrote: > > I have mostly looked at reducing the slab memory consumption here. > > But I do understand that default tunable values have been arrived > > at based on some

Re: Higher slub memory consumption on 64K page-size systems?

2020-10-28 Thread Roman Gushchin
On Wed, Oct 28, 2020 at 11:20:30AM +0530, Bharata B Rao wrote: > Hi, > > On POWER systems, where 64K PAGE_SIZE is default, I see that slub > consumes higher amount of memory compared to any 4K page-size system. > While slub is obviously going to consume more memory on 64K page-size > systems

Higher slub memory consumption on 64K page-size systems?

2020-10-28 Thread Bharata B Rao
Hi, On POWER systems, where 64K PAGE_SIZE is default, I see that slub consumes higher amount of memory compared to any 4K page-size system. While slub is obviously going to consume more memory on 64K page-size systems compared to 4K as slabs are allocated in page-size granularity, I want to check