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authorNikos Nikoleris <nikos.nikoleris@arm.com>2016-10-10 14:06:00 +0100
committerNikos Nikoleris <nikos.nikoleris@arm.com>2018-10-18 09:40:41 +0000
commit313c015bbc61da0b8acedc84e4d136835a9f9805 (patch)
treee9043ea307e6c9027738e53377a23fbec3e906b8 /src/mem/comm_monitor.cc
parentbf305c14c47c4bd228c0910ea3bb30ab4bc935e1 (diff)
downloadgem5-313c015bbc61da0b8acedc84e4d136835a9f9805.tar.xz
mem: Add write coalescing and write-no-allocate to the caches
Enable the cache to detect contiguous writes and hold on to the MSHR long enough to allow the entire line to be written. If the whole line is written, the MSHR will be sent out as an invalidation requests, as it is part of a whole-line write, i.e. no-fetch-on-write. The cache is also able to switch to a write-no-allocate policy on the actual completion of the writes, and instead use the tempBlock and turn the write operation into a writeback. These policies are all well-known, and described in works such as Jouppi, Cache Write Policies and Performance, vol 21, no 2, ACM, 1993. Change-Id: I19792f2970b3c6798c9b2b493acdd156897284ae Reviewed-on: https://gem5-review.googlesource.com/c/12907 Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br> Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
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