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Fixes to get prefetching working again.

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Apparently we broke it with the cache rewrite and never noticed.
Thanks to Bao Yungang <baoyungang@gmail.com> for a significant part
of these changes (and for inspiring me to work on the rest).
Some other overdue cleanup on the prefetch code too.
This commit is contained in:
Steve Reinhardt
2009-02-16 08:56:40 -08:00
parent 6923282fb5
commit 89a7fb0393
18 changed files with 384 additions and 349 deletions
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12
src/mem/cache/BaseCache.py vendored
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@@ -52,12 +52,10 @@ class BaseCache(MemObject):
two_queue = Param.Bool(False,
"whether the lifo should have two queue replacement")
write_buffers = Param.Int(8, "number of write buffers")
prefetch_miss = Param.Bool(False,
"wheter you are using the hardware prefetcher from Miss stream")
prefetch_access = Param.Bool(False,
"wheter you are using the hardware prefetcher from Access stream")
prefetch_on_access = Param.Bool(False,
"notify the hardware prefetcher on every access (not just misses)")
prefetcher_size = Param.Int(100,
"Number of entries in the harware prefetch queue")
"Number of entries in the hardware prefetch queue")
prefetch_past_page = Param.Bool(False,
"Allow prefetches to cross virtual page boundaries")
prefetch_serial_squash = Param.Bool(False,
@@ -69,9 +67,9 @@ class BaseCache(MemObject):
prefetch_policy = Param.Prefetch('none',
"Type of prefetcher to use")
prefetch_cache_check_push = Param.Bool(True,
"Check if in cash on push or pop of prefetch queue")
"Check if in cache on push or pop of prefetch queue")
prefetch_use_cpu_id = Param.Bool(True,
"Use the CPU ID to seperate calculations of prefetches")
"Use the CPU ID to separate calculations of prefetches")
prefetch_data_accesses_only = Param.Bool(False,
"Only prefetch on data not on instruction accesses")
cpu_side = Port("Port on side closer to CPU")