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authorDaniel R. Carvalho <odanrc@yahoo.com.br>2019-04-18 15:53:21 +0200
committerDaniel Carvalho <odanrc@yahoo.com.br>2019-05-08 17:41:09 +0000
commitbf0a722acdd8247602e83720a5f81a0b69c76250 (patch)
treea43034cd6ae6e69d35138f0b3a36e54980531e0b /src/mem/protocol
parente54c7a68f8bae79bc3fabac2534ef5af14cda9ae (diff)
downloadgem5-bf0a722acdd8247602e83720a5f81a0b69c76250.tar.xz
mem-cache: Remove writebacks packet list
Previously all atomic writebacks concerned a single block, therefore, when a block was evicted, no other block would be pending eviction. With sector tags (and compression), however, a single replacement can generate many evictions. This can cause problems, since a writeback that evicts a block may evict blocks in the lower cache. If one of these conflict with one of the blocks pending eviction in the higher level, the snoop must inform it to the lower level. Since atomic mode does not have a writebuffer, this kind of conflict wouldn't be noticed. Therefore, instead of evicting multiple blocks at once, we do it one by one. Change-Id: I2fc2f9eb0f26248ddf91adbe987d158f5a2e592b Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/18209 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
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