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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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4
base-linux/src/core/include/cpu_session_component.h
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@ -150,8 +150,8 @@ namespace Genode {
Thread_state state(Thread_capability);
void state(Thread_capability, Thread_state const &);
void exception_handler(Thread_capability, Signal_context_capability);
unsigned num_cpus() const;
void affinity(Thread_capability, unsigned);
Affinity::Space affinity_space() const;
void affinity(Thread_capability, Affinity::Location);
/*******************************

2
base-linux/src/core/include/platform_thread.h
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@ -114,7 +114,7 @@ namespace Genode {
}
const char *name() { return _name; }
void affinity(unsigned) { }
void affinity(Affinity::Location) { }
/**
* Register process ID and thread ID of thread