On Thu, 2015-10-12 at 22:34:42 UTC, Michael Neuling wrote: > Currently we copy the whole mm_context_t to the paca but only access a > few bits of it. This is wasteful of space paca and also takes quite > some time in the hot path of context switching. > > This patch pulls in only the required bits from the mm_context_t to > the paca and on context switch, copies only those. > > Benchmarking this (On top of Anton's recent MSR context switching > changes [1]) using processes and yield shows an improvement of almost > 3% on POWER8: > > http://ozlabs.org/~anton/junkcode/context_switch2.c > ./context_switch2 --test=yield --process 0 0 > > 1. https://lists.ozlabs.org/pipermail/linuxppc-dev/2015-October/135700.html > > Signed-off-by: Michael Neuling <mi...@neuling.org>
Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/2fc251a8dda56b71ec491bee4c cheers _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
