src/mem/ruby/network/simple/routing/WeightBased.hh

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#ifndef __MEM_RUBY_NETWORK_SIMPLE_WEIGHTBASEDROUTINGUNIT_HH__
#define __MEM_RUBY_NETWORK_SIMPLE_WEIGHTBASEDROUTINGUNIT_HH__

#include "mem/ruby/network/simple/routing/BaseRoutingUnit.hh"
#include "params/WeightBased.hh"

namespace gem5
{

namespace ruby
{

class WeightBased : public BaseRoutingUnit
{
  public:
    PARAMS(WeightBased);

    WeightBased(const Params &p);

    void addOutPort(LinkID link_id,
                    const std::vector<MessageBuffer*>& m_out_buffer,
                    const NetDest& routing_table_entry,
                    const PortDirection &direction,
                    int link_weight) override;

    void route(const Message &msg,
                int vnet,
                bool deterministic,
                std::vector<RouteInfo> &out_links) override;

  private:

    struct LinkInfo {
        const LinkID m_link_id;
        const NetDest m_routing_entry;
        const std::vector<MessageBuffer*> m_out_buffers;
        int m_order;
        int m_weight;
    };

    std::vector<std::unique_ptr<LinkInfo>> m_links;

    void findRoute(const Message &msg,
                   std::vector<RouteInfo> &out_links) const;

    void sortLinks() {
        std::sort(m_links.begin(), m_links.end(),
            [](const auto &a, const auto &b) {
                auto tup = [](const auto &li)
                { return std::make_tuple(li->m_order,
                                         li->m_weight,
                                         li->m_link_id);};
                return tup(a) < tup(b);
            });
    }
};

} // namespace ruby
} // namespace gem5

#endif // __MEM_RUBY_NETWORK_SIMPLE_WEIGHTBASEDROUTINGUNIT_HH__