Hi all This seris is based on Roger's L0 assisted flush series.
I have done some testing against a Linux on Hyper-V in a 32-vcpu VM. All builds were done with -j32. Building Xen on Linux: real 0m45.376s user 2m28.156s sys 0m51.672s Building Xen on Linux on Xen on Hyper-V, no assisted flush: real 3m8.762s user 10m46.787s sys 30m14.492s Building Xen on Linux on Xen on Hyper-V, with assisted flush: real 0m44.369s user 3m16.231s sys 3m3.330s Building Linux x86_64_defconfig on Linux: real 0m59.698s user 21m14.014s sys 2m58.742s Building Linux x86_64_defconfig on Linux on Xen on Hyper-V, no assisted flush: real 2m6.284s user 31m18.706s sys 20m31.106s Building Linux x86_64_defconfig on Linux on Xen on Hyper-V, with assisted flush: real 1m38.968s user 28m40.398s sys 11m20.151s There are various degrees of improvement depending on the workload. Xen can perhaps be optmised a bit more because it currently doesn't pass the address space id (cr3) to Hyper-V, but that requires reworking TLB flush APIs within Xen. Wei. Cc: Jan Beulich <jbeul...@suse.com> Cc: Andrew Cooper <andrew.coop...@citrix.com> Cc: Wei Liu <w...@xen.org> Cc: Roger Pau Monné <roger....@citrix.com> Cc: Michael Kelley <mikel...@microsoft.com> Cc: Paul Durrant <pdurr...@amazon.com> Wei Liu (4): x86/hyperv: misc cleanup x86/hypervisor: pass flags to hypervisor_flush_tlb x86/hyperv: skeleton for L0 assisted TLB flush x86/hyperv: L0 assisted TLB flush xen/arch/x86/guest/hyperv/Makefile | 2 + xen/arch/x86/guest/hyperv/hyperv.c | 19 +- xen/arch/x86/guest/hyperv/private.h | 15 +- xen/arch/x86/guest/hyperv/tlb.c | 211 +++++++++++++++++++++++ xen/arch/x86/guest/hyperv/util.c | 72 ++++++++ xen/arch/x86/guest/hypervisor.c | 4 +- xen/arch/x86/guest/xen/xen.c | 2 +- xen/arch/x86/smp.c | 2 +- xen/include/asm-x86/guest/hyperv-hcall.h | 5 +- xen/include/asm-x86/guest/hypervisor.h | 10 +- 10 files changed, 329 insertions(+), 13 deletions(-) create mode 100644 xen/arch/x86/guest/hyperv/tlb.c create mode 100644 xen/arch/x86/guest/hyperv/util.c -- 2.20.1 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
