On Thu, 2015-10-29 at 11:44 +1100, Anton Blanchard wrote: > Create a single function that gives everything up (FP, VMX, VSX, SPE). > Doing this all at once means we only do one MSR write. > > A context switch microbenchmark using yield(): > > http://ozlabs.org/~anton/junkcode/context_switch2.c > > ./context_switch2 --test=yield --fp --altivec --vector 0 0 > > shows an improvement of 3% on POWER8. > > Signed-off-by: Anton Blanchard <an...@samba.org> > --- > arch/powerpc/include/asm/switch_to.h | 1 + > arch/powerpc/kernel/process.c | 75 > ++++++++++++++++++++++++++++-------- > arch/powerpc/kvm/book3s_pr.c | 17 +-------
books3s_pr.c can be a module, so we need giveup_all() to be EXPORT_SYMBOL. I'll fix it up on my end. cheers _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
