diff options
Diffstat (limited to 'src/mem/cache/base.cc')
| -rw-r--r-- | src/mem/cache/base.cc | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/mem/cache/base.cc b/src/mem/cache/base.cc index 1cbfe713b..ecbd3526e 100644 --- a/src/mem/cache/base.cc +++ b/src/mem/cache/base.cc @@ -68,8 +68,8 @@ BaseCache::CacheSlavePort::CacheSlavePort(const std::string &_name, BaseCache::BaseCache(const BaseCacheParams *p, unsigned blk_size) : MemObject(p), cpuSidePort(nullptr), memSidePort(nullptr), - mshrQueue("MSHRs", p->mshrs, 4, p->demand_mshr_reserve), - writeBuffer("write buffer", p->write_buffers, p->mshrs+1000), + mshrQueue("MSHRs", p->mshrs, 0, p->demand_mshr_reserve), // see below + writeBuffer("write buffer", p->write_buffers, p->mshrs), // see below blkSize(blk_size), lookupLatency(p->hit_latency), forwardLatency(p->hit_latency), @@ -85,6 +85,12 @@ BaseCache::BaseCache(const BaseCacheParams *p, unsigned blk_size) addrRanges(p->addr_ranges.begin(), p->addr_ranges.end()), system(p->system) { + // the MSHR queue has no reserve entries as we check the MSHR + // queue on every single allocation, whereas the write queue has + // as many reserve entries as we have MSHRs, since every MSHR may + // eventually require a writeback, and we do not check the write + // buffer before committing to an MSHR + // forward snoops is overridden in init() once we can query // whether the connected master is actually snooping or not } |