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Fix LFU implementation 

While at it make some alignment changes.
This commit is contained in:
Sanchayan Maity 2017-04-05 23:44:23 +05:30
parent 5af8a0c2af
commit bfcc9d4080
1 changed files with 29 additions and 28 deletions
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57
src/mem/cache/tags/lfu.cc vendored
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@ -20,36 +20,37 @@ LFU::LFU(const Params *p) : BaseSetAssoc(p)
CacheBlk*
LFU::accessBlock(Addr addr, bool is_secure, Cycles &lat, int master_id)
{
CacheBlk *blk = BaseSetAssoc::accessBlock(addr,
CacheBlk *blk = BaseSetAssoc::accessBlock(addr,
is_secure, lat, master_id);
return blk;
return blk;
}
CacheBlk*
LFU::findVictim(Addr addr)
{
int set = extractSet(addr);
int minimum;
BlkType *blk = nullptr;
for (int i = 0; i < allocAssoc; ++i) {
BlkType *b = sets[set].blks[i];
if (i == 0) {
minimum = b->refCount;
blk = b;
}
else if (b->refCount < minimum) {
minimum = b->refCount;
blk = b;
}
}
assert(!blk || blk->way < allocAssoc);
CacheBlk *blk = BaseSetAssoc::findVictim(addr);
unsigned set = extractSet(addr);
unsigned minimum;
if (blk && blk->isValid()) {
DPRINTF(CacheRepl,
"set %x: selecting blk %x for replacement\n",
set, regenerateBlkAddr(blk->tag, set));
BlkType *blk = nullptr;
for (int i = 0; i < allocAssoc; ++i) {
BlkType *b = sets[set].blks[i];
if (i == 0) {
minimum = b->refCount;
blk = b;
}
else if (b->refCount < minimum) {
minimum = b->refCount;
blk = b;
}
}
assert(!blk || blk->way < allocAssoc);
DPRINTF(CacheRepl,
"set %x: selecting blk %x for replacement\n",
set, regenerateBlkAddr(blk->tag, set));
}
return blk;
@ -58,23 +59,23 @@ LFU::findVictim(Addr addr)
void
LFU::insertBlock(PacketPtr pkt, BlkType *blk)
{
BaseSetAssoc::insertBlock(pkt, blk);
BaseSetAssoc::insertBlock(pkt, blk);
int set = extractSet(pkt->getAddr());
sets[set].moveToHead(blk);
int set = extractSet(pkt->getAddr());
sets[set].moveToHead(blk);
}
void
LFU::invalidate(CacheBlk *blk)
{
BaseSetAssoc::invalidate(blk);
BaseSetAssoc::invalidate(blk);
int set = blk->set;
sets[set].moveToTail(blk);
int set = blk->set;
sets[set].moveToTail(blk);
}
LFU*
LFUParams::create()
{
return new LFU(this);
return new LFU(this);
}