[gem5-users] what is temp block?

[Mahmood Naderan]

Hi
What does temp block mean? According to the code:

        // need to do a replacement
        blk = allocateBlock(addr, writebacks);
        if (blk == NULL) {
            // No replaceable block... just use temporary storage to
            // complete the current request and then get rid of it
            assert(!tempBlock->isValid());
            blk = tempBlock;
            tempBlock->set = tags->extractSet(addr);
            tempBlock->tag = tags->extractTag(addr);
            DPRINTF(Cache, "using temp block for %x\n", addr);
        } else {
            int id = pkt->req->masterId();
            tags->insertBlock(pkt->getAddr(), blk, id);
        }

I would say, when blk==NULL, then surely a replacement is needed. So
what is temprary block? The comment doesn't give such information.
--
// Naderan *Mahmood;
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