Re: [PATCH v6 00/19] The new cgroup slab memory controller

Roman Gushchin
2020-06-18T02:18:14Z

On Tue, Jun 16, 2020 at 06:46:56PM -0700, Shakeel Butt wrote:
> On Mon, Jun 8, 2020 at 4:07 PM Roman Gushchin <guro@fb.com> wrote:
> >
> > This is v6 of the slab cgroup controller rework.
> >
> > The patchset moves the accounting from the page level to the object
> > level. It allows to share slab pages between memory cgroups.
> > This leads to a significant win in the slab utilization (up to 45%)
> > and the corresponding drop in the total kernel memory footprint.
>
> Is this based on just SLUB or does this have a similar impact on SLAB as well?

Just got some fresh numbers on my desktop running 5.8-rc1 + slab controller v6.
It's 8-cores Ryzen 1700 with 32 GB RAM running Fedora 32.

I measured the size of slab memory just after logging into the system.

SLUB SLAB
Original: 463232 kB 312880 kB
Patched: 194840 kB 193392 kB
-58% -38%

Plus perpcu memory usage is also a bit lower.

Thanks!