Hi! I am working with 3 priority queues on simple_switch, and I am trying to collect I

Queue metadata with multiqueue about behavioral-model HOT 2 OPEN

carlos-hfm commented on August 17, 2024

Queue metadata with multiqueue

from behavioral-model.

Comments (2)

antoninbas commented on August 17, 2024

Yes, in the simple_switch implementation it seems that the qdepth is measured across all priority queues for a given port:

behavioral-model/targets/simple_switch/simple_switch.cpp

Lines 411 to 412 in a8e2947

    
           phv->get_field("queueing_metadata.enq_qdepth") 
        
               .set(egress_buffers.size(egress_port));

behavioral-model/include/bm/bm_sim/queueing.h

Lines 616 to 635 in a8e2947

    
           //! The occupancies of all the priority queues for this logical queue are 
        
           //! added. 
        
           size_t size(size_t queue_id) const { 
        
             LockType lock(mutex); 
        
             auto it = queues_info.find(queue_id); 
        
             if (it == queues_info.end()) return 0; 
        
             auto &q_info = it->second; 
        
             return q_info.size; 
        
           } 
        
           //! Get the occupancy of priority queue \p priority for logical queue with id 
        
           //! \p queue_id. 
        
           size_t size(size_t queue_id, size_t priority) const { 
        
             LockType lock(mutex); 
        
             auto it = queues_info.find(queue_id); 
        
             if (it == queues_info.end()) return 0; 
        
             auto &q_info = it->second; 
        
             auto &q_info_pri = q_info.at(priority); 
        
             return q_info_pri.size; 
        
           }

Notice how the first variant is called by simple_switch

from behavioral-model.

Queue metadata with multiqueue about behavioral-model HOT 2 OPEN

Comments (2)

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	phv->get_field("queueing_metadata.enq_qdepth")
	.set(egress_buffers.size(egress_port));

	//! The occupancies of all the priority queues for this logical queue are
	//! added.
	size_t size(size_t queue_id) const {
	LockType lock(mutex);
	auto it = queues_info.find(queue_id);
	if (it == queues_info.end()) return 0;
	auto &q_info = it->second;
	return q_info.size;
	}

	//! Get the occupancy of priority queue \p priority for logical queue with id
	//! \p queue_id.
	size_t size(size_t queue_id, size_t priority) const {
	LockType lock(mutex);
	auto it = queues_info.find(queue_id);
	if (it == queues_info.end()) return 0;
	auto &q_info = it->second;
	auto &q_info_pri = q_info.at(priority);
	return q_info_pri.size;
	}