[gem5-users] recvAtomicLogic() in mem_ctrl.cc

[John Smith via gem5-users]

Hi everyone,

Could someone please help me with explaining what's happening in the below
code snippet? It's the receiveAtomicLogic() function in mem_ctrl.cc. Why
are we returning the latency as 0 if the packet doesn't have any data? And
in what case will the packet have/not have data?

// do the actual memory access and turn the packet into a response
mem_intr->access(pkt);

if (pkt->hasData()) {
// this value is not supposed to be accurate, just enough to
// keep things going, mimic a closed page
// also this latency can't be 0
return mem_intr->accessLatency();
}

return 0;

-- 
Regards,
John Smith

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