Hoa Nguyen has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/68877?usp=email )
Change subject: stdlib: use atomic_noncaching when using AtomicSimpleCPU
with Ruby
......................................................................
stdlib: use atomic_noncaching when using AtomicSimpleCPU with Ruby
mem_mode is supposed to be atomic_noncaching when running
AtomicSimpleCPU with Ruby cache.
Change-Id: Icb419f9370038f5c1f80dd879b187338279a5b93
Signed-off-by: Hoa Nguyen <hoangu...@ucdavis.edu>
---
M src/python/gem5/components/processors/base_cpu_processor.py
M src/python/gem5/components/processors/simple_switchable_processor.py
2 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/src/python/gem5/components/processors/base_cpu_processor.py
b/src/python/gem5/components/processors/base_cpu_processor.py
index d311a0f..9a75615 100644
--- a/src/python/gem5/components/processors/base_cpu_processor.py
+++ b/src/python/gem5/components/processors/base_cpu_processor.py
@@ -97,6 +97,7 @@
"'atomic_noncaching' memory mode. This will skip
caching "
"completely."
)
+ board.set_mem_mode(MemMode.ATOMIC_NONCACHING)
else:
board.set_mem_mode(MemMode.ATOMIC)
else:
diff --git
a/src/python/gem5/components/processors/simple_switchable_processor.py
b/src/python/gem5/components/processors/simple_switchable_processor.py
index 56603fa..bfeb9bc 100644
--- a/src/python/gem5/components/processors/simple_switchable_processor.py
+++ b/src/python/gem5/components/processors/simple_switchable_processor.py
@@ -103,6 +103,11 @@
def incorporate_processor(self, board: AbstractBoard) -> None:
super().incorporate_processor(board=board)
+ # special case:
+ # ruby cache doesn't support "atomic" mem mode; however, ruby cache
+ # supports "atomic_noncaching" mem mode, which bypasses the cache.
+ if board.get_cache_hierarchy().is_ruby() and self._mem_mode =
MemMode.ATOMIC:
+ self._mem_mode = MemMode.ATOMIC_NONCACHING
board.set_mem_mode(self._mem_mode)
def switch(self):
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: Icb419f9370038f5c1f80dd879b187338279a5b93
Gerrit-Change-Number: 68877
Gerrit-PatchSet: 1
Gerrit-Owner: Hoa Nguyen <hoangu...@ucdavis.edu>
Gerrit-MessageType: newchange
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