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authorSophiane Senni <sophiane.senni@gmail.com>2016-11-30 17:10:27 -0500
committerSophiane Senni <sophiane.senni@gmail.com>2016-11-30 17:10:27 -0500
commitce2722cdd97a31f85d36f6c32637b230e3c25c73 (patch)
tree72993532267d3f1f99e8519be837dd7c523a722f /src/mem/cache/tags/base.hh
parent047caf24ba9a640247b63584c2291e760f1f4d54 (diff)
downloadgem5-ce2722cdd97a31f85d36f6c32637b230e3c25c73.tar.xz
mem: Split the hit_latency into tag_latency and data_latency
If the cache access mode is parallel, i.e. "sequential_access" parameter is set to "False", tags and data are accessed in parallel. Therefore, the hit_latency is the maximum latency between tag_latency and data_latency. On the other hand, if the cache access mode is sequential, i.e. "sequential_access" parameter is set to "True", tags and data are accessed sequentially. Therefore, the hit_latency is the sum of tag_latency plus data_latency. Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Diffstat (limited to 'src/mem/cache/tags/base.hh')
-rw-r--r--src/mem/cache/tags/base.hh8
1 files changed, 7 insertions, 1 deletions
diff --git a/src/mem/cache/tags/base.hh b/src/mem/cache/tags/base.hh
index f1ef947a5..8c68cc093 100644
--- a/src/mem/cache/tags/base.hh
+++ b/src/mem/cache/tags/base.hh
@@ -69,7 +69,13 @@ class BaseTags : public ClockedObject
const unsigned blkSize;
/** The size of the cache. */
const unsigned size;
- /** The access latency of the cache. */
+ /** The tag lookup latency of the cache. */
+ const Cycles lookupLatency;
+ /**
+ * The total access latency of the cache. This latency
+ * is different depending on the cache access mode
+ * (parallel or sequential)
+ */
const Cycles accessLatency;
/** Pointer to the parent cache. */
BaseCache *cache;