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Express affinities via Cartesian coordinates

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This patch introduces new types for expressing CPU affinities. Instead
of dealing with physical CPU numbers, affinities are expressed as
rectangles in a grid of virtual CPU nodes. This clears the way to
conveniently assign sets of adjacent CPUs to subsystems, each of them
managing their respective viewport of the coordinate space.

By using 2D Cartesian coordinates, the locality of CPU nodes can be
modeled for different topologies such as SMP (simple Nx1 grid), grids of
NUMA nodes, or ring topologies.
This commit is contained in:
Norman Feske
2013-08-07 22:16:58 +02:00
parent fa7329a3e6
commit 5fe29e8e4a
49 changed files with 445 additions and 239 deletions
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8
base-linux/include/linux_cpu_session/client.h
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@ -60,11 +60,11 @@ namespace Genode {
void single_step(Thread_capability thread, bool enable) {
call<Rpc_single_step>(thread, enable); }
unsigned num_cpus() const {
return call<Rpc_num_cpus>(); }
Affinity::Space affinity_space() const {
return call<Rpc_affinity_space>(); }
void affinity(Thread_capability thread, unsigned cpu) {
call<Rpc_affinity>(thread, cpu); }
void affinity(Thread_capability thread, Affinity::Location location) {
call<Rpc_affinity>(thread, location); }
/*****************************