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| author | Mitch Hayenga <mitch.hayenga+gem5@gmail.com> | 2014-01-29 23:21:26 -0600 |
|---|---|---|
| committer | Mitch Hayenga <mitch.hayenga+gem5@gmail.com> | 2014-01-29 23:21:26 -0600 |
| commit | 96317d466ea26955ce26f658f162755b39d3352e (patch) | |
| tree | 2ac30c0120148197f833244b090de6f044f7d43c /src/mem/cache/prefetch/stride.hh | |
| parent | 771c864bf407b57bf91896f38e989e8a36cd9cd1 (diff) | |
| download | gem5-96317d466ea26955ce26f658f162755b39d3352e.tar.xz | |
mem: Add additional tolerance to stride prefetcher
Forces the prefetcher to mispredict twice in a row before resetting the
confidence of prefetching. This helps cases where a load PC strides by a
constant factor, however it may operate on different arrays at times.
Avoids the cost of retraining. Primarily helps with small iteration loops.
Committed by: Nilay Vaish <nilay@cs.wisc.edu>
Diffstat (limited to 'src/mem/cache/prefetch/stride.hh')
| -rw-r--r-- | src/mem/cache/prefetch/stride.hh | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mem/cache/prefetch/stride.hh b/src/mem/cache/prefetch/stride.hh index 0e31984f9..a491eb687 100644 --- a/src/mem/cache/prefetch/stride.hh +++ b/src/mem/cache/prefetch/stride.hh @@ -72,6 +72,7 @@ class StridePrefetcher : public BasePrefetcher bool isSecure; int stride; int confidence; + bool tolerance; }; std::list<StrideEntry*> table[Max_Contexts]; |