On Thu, 25 Oct 2018 at 05:50, Isaku Yamahata <isaku.yamahata@xxxxxxxxx> wrote: > > This patch series implements xmm fast hypercall for hyper-v as guest > and kvm support as VMM. > With this patch, HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE without > gva list, HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX(vcpu > 64) and > HVCALL_SEND_IPI_EX(vcpu > 64) can use xmm fast hypercall. > > benchmark result: > At the moment, my test machine have only pcpu=4, ipi benchmark doesn't Did you evaluate xmm fast hypercall for pv ipis? In addition, testing on a large server can provide a forceful evidence. Regards, Wanpeng Li > make any behaviour change. So for now I measured the time of > hyperv_flush_tlb_others() by ktap with 'hardinfo -r -f text'. > the average of 5 runs are as follows. > (When large machine with pcpu > 64 is avaialble, ipi_benchmark result is > interesting. But not yet now.) > > hyperv_flush_tlb_others() time by hardinfo -r -f text: > > with path: 9931 ns > without patch: 11111 ns > > > With patch of 4bd06060762b, __send_ipi_mask() now uses fast hypercall > when possible. so in the case of vcpu=4. So I used kernel before the parch > to measure the effect of xmm fast hypercall with ipi_benchmark. > The following is the average of 100 runs. > > ipi_benchmark: average of 100 runs without 4bd06060762b > > with patch: > Dry-run 0 495181 > Self-IPI 11352737 21549999 > Normal IPI 499400218 575433727 > Broadcast IPI 0 1700692010 > Broadcast lock 0 1663001374 > > without patch: > Dry-run 0 607657 > Self-IPI 10915950 21217644 > Normal IPI 621712609 735015570 > Broadcast IPI 0 2173803373 > Broadcast lock 0 2150451543 > > Isaku Yamahata (6): > x86/kernel/hyper-v: xmm fast hypercall as guest > x86/hyperv: use hv_do_hypercall for __send_ipi_mask_ex() > x86/hyperv: use hv_do_hypercall for flush_virtual_address_space_ex > hyperv: use hv_do_hypercall instead of hv_do_fast_hypercall > x86/kvm/hyperv: implement xmm fast hypercall > local: hyperv: test ex hypercall > > arch/x86/hyperv/hv_apic.c | 16 +++- > arch/x86/hyperv/mmu.c | 24 +++-- > arch/x86/hyperv/nested.c | 2 +- > arch/x86/include/asm/hyperv-tlfs.h | 3 + > arch/x86/include/asm/mshyperv.h | 180 ++++++++++++++++++++++++++++++++++-- > arch/x86/kvm/hyperv.c | 101 ++++++++++++++++---- > drivers/hv/connection.c | 3 +- > drivers/hv/hv.c | 3 +- > drivers/pci/controller/pci-hyperv.c | 7 +- > 9 files changed, 291 insertions(+), 48 deletions(-) > > -- > 2.14.1 >
