Messages in this thread | | | From | Paolo Bonzini <> | Subject | [RFC PATCH v3 0/6] KVM: x86: avoid redundant REQ_EVENT | Date | Mon, 19 Dec 2016 10:47:12 +0100 |
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This is the result of cleaning up the places that set REQ_EVENT unnecessarily. The savings on self-IPI kvm-unit-tests are:
self_ipi_sti_nop ~300 clock cycles self_ipi_sti_hlt ~300 clock cycles self_ipi_tpr ~400 clock cycles self_ipi_tpr_sti_nop ~700 clock cycles self_ipi_tpr_sti_hlt ~700 clock cycles
which is in the 5-10% range. Please help me comparing this series with "[PATCH v2] KVM: x86: avoid redundant REQ_EVENT" on the real workload!
Thanks,
Paolo
Paolo Bonzini (6): KVM: x86: add VCPU stat for KVM_REQ_EVENT processing KVM: lapic: do not set KVM_REQ_EVENT unnecessarily on EOI KVM: vmx: speed up TPR below threshold vmexits KVM: lapic: remove unnecessary KVM_REQ_EVENT on PPR update KVM: lapic: do not set KVM_REQ_EVENT unnecessarily on PPR update KVM: lapic: do not scan IRR when delivering an interrupt
arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/lapic.c | 58 +++++++++++++++++++++++++---------------- arch/x86/kvm/lapic.h | 1 + arch/x86/kvm/vmx.c | 2 +- arch/x86/kvm/x86.c | 2 ++ 5 files changed, 41 insertions(+), 23 deletions(-)
-- 1.8.3.1
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