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 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
