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[SPARC64]: Fix missing load-twin usage in Niagara-1 memcpy.
authorDavid S. Miller <davem@sunset.davemloft.net>
Tue, 2 Oct 2007 08:03:09 +0000 (01:03 -0700)
committerDavid S. Miller <davem@sunset.davemloft.net>
Tue, 2 Oct 2007 08:03:09 +0000 (01:03 -0700)
commit25e5566ed38650f7990041fcd20571d6ddd2a040
tree26d5bf006a6945930102fa01ad0edcd479b39bbftree | snapshot (tar.gz zip)
parent8cc8c28a9acdceda0e60519167a052cc3408c5c3commit | diff
[SPARC64]: Fix missing load-twin usage in Niagara-1 memcpy.

For the case where the source is not aligned modulo 8
we don't use load-twins to suck the data in and this
kills performance since normal loads allocate in the
L1 cache (unlike load-twin) and thus big memcpys swipe
the entire L1 D-cache.

We need to allocate a register window to implement this
properly, but that actually simplifies a lot of things
as a nice side-effect.

Signed-off-by: David S. Miller <davem@davemloft.net>
arch/sparc64/lib/NGcopy_from_user.S diff | blob | blame | history
arch/sparc64/lib/NGcopy_to_user.S diff | blob | blame | history
arch/sparc64/lib/NGmemcpy.S diff | blob | blame | history