Hello kokoro, Daniel Carvalho, Jason Lowe-Power, Nikos Nikoleris,
I'd like you to reexamine a change. Please visit
https://gem5-review.googlesource.com/c/public/gem5/+/12087
to look at the new patch set (#15).
Change subject: mem-cache: Handle data expansion
......................................................................
mem-cache: Handle data expansion
When a block in compressed form is overwriten, it may change
its size. If the new compressed size is bigger, and the total
size becomes bigger than the block size, one or more blocks
will have to be evicted. This is called data expansion, or
fat writes.
This change assumes that a first level cache cannot have a
compressor, since otherwise data expansion should have been
handled for atomic operations and writes. As such, data
expansions should only be seen on writebacks. As writebacks
are forwarded to the next level when failed, there should
be no data expansions when servicing misses either.
This patch adds the functionality to handle data expansions
by evicting the co-allocated blocks to make room for an
expanded block.
Change-Id: I0bd77bf6446bfae336889940b2f75d6f0c87e533
Signed-off-by: Daniel R. Carvalho <oda...@yahoo.com.br>
---
M src/mem/cache/base.cc
M src/mem/cache/base.hh
M src/mem/cache/tags/compressed_tags.cc
M src/mem/cache/tags/compressed_tags.hh
M src/mem/cache/tags/super_blk.cc
M src/mem/cache/tags/super_blk.hh
6 files changed, 244 insertions(+), 41 deletions(-)
--
To view, visit https://gem5-review.googlesource.com/c/public/gem5/+/12087
To unsubscribe, or for help writing mail filters, visit
https://gem5-review.googlesource.com/settings
Gerrit-Project: public/gem5
Gerrit-Branch: master
Gerrit-Change-Id: I0bd77bf6446bfae336889940b2f75d6f0c87e533
Gerrit-Change-Number: 12087
Gerrit-PatchSet: 15
Gerrit-Owner: Daniel Carvalho <oda...@yahoo.com.br>
Gerrit-Reviewer: Daniel Carvalho <oda...@yahoo.com.br>
Gerrit-Reviewer: Jason Lowe-Power <ja...@lowepower.com>
Gerrit-Reviewer: Nikos Nikoleris <nikos.nikole...@arm.com>
Gerrit-Reviewer: kokoro <noreply+kok...@google.com>
Gerrit-MessageType: newpatchset
_______________________________________________
gem5-dev mailing list
gem5-dev@gem5.org
http://m5sim.org/mailman/listinfo/gem5-dev
