On 23.01.2023 16:47, Carlo Nonato wrote:
> Shared caches in multi-core CPU architectures represent a problem for
> predictability of memory access latency. This jeopardizes applicability
> of many Arm platform in real-time critical and mixed-criticality
> scenarios. We introduce support for cache partitioning with page
> coloring, a transparent software technique that enables isolation
> between domains and Xen, and thus avoids cache interference.
>
> When creating a domain, a simple syntax (e.g. `0-3` or `4-11`) allows
> the user to define assignments of cache partitions ids, called colors,
> where assigning different colors guarantees no mutual eviction on cache
> will ever happen. This instructs the Xen memory allocator to provide
> the i-th color assignee only with pages that maps to color i, i.e. that
> are indexed in the i-th cache partition.
>
> The proposed implementation supports the dom0less feature.
> The proposed implementation doesn't support the static-mem feature.
> The solution has been tested in several scenarios, including Xilinx Zynq
> MPSoCs.
>
> v4 global changes:
> - added "llc" acronym (Last Level Cache) in multiple places in code
> (e.g. coloring.{c|h} -> llc_coloring.{c|h}) to better describe the
Please can you use dashes in favor of underscores in the names of new
files?
Jan
