On Wed, Jun 24, 2015 at 05:04:10PM -0700, Mario Smarduch wrote: > Currently we save/restore fp/simd on each exit. Fist patch optimizes arm64 > save/restore, we only do so on Guest access. hackbench and > several lmbench tests show anywhere from 30% to above 50% optimzation > achieved. > > In second patch 32-bit handler is updated to keep exit handling consistent > with 64-bit code. 30-50% of what? The overhead or overall performance? > > Changes since v1: > - Addressed Marcs comments > - Verified optimization improvements with lmbench and hackbench, updated > commit message > > Changes since v2: > - only for patch 2/2 > - Reworked trapping to vfp access handler > > Changes since v3: > - Only for patch 2/2 > - Removed load_vcpu in switch_to_guest_vfp per Marcs comment > - Got another chance to replace an unreferenced label with a comment > > > Mario Smarduch (2): > Optimize arm64 skip 30-50% vfp/simd save/restore on exits > keep arm vfp/simd exit handling consistent with arm64 > > arch/arm/kvm/interrupts.S | 14 +++++++----- > arch/arm64/include/asm/kvm_arm.h | 5 ++++- > arch/arm64/kvm/hyp.S | 46 +++++++++++++++++++++++++++++++++++--- > 3 files changed, 55 insertions(+), 10 deletions(-) > > -- > 1.7.9.5 > _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
