[libre-riscv-dev] [Bug 209] spectre-proof speculative execution

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Mon May 18 21:51:12 BST 2020


--- Comment #6 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
actually, you know what?  collating all "shadow" signals right down into
the L0CacheBuffer might be a really good way to ensure that there is time
for the L0CacheBuffer to "collate" (merge) multiple requests.

right now, as it stands, each request that comes in, if sent immediately
on an elstrided sequence, could be followed up by another request that
*could* have been merged with the 1st into the exact same cache-line...
if only the 1st had been delayed for just one cycle.

if there is a good reason to delay them, this actually could be beneficial.

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