4abaffce4d
In the vCPU reset and set APIC_BASE MSR path, the apic map will be recalculated several times, each time it will consume 10+ us observed by ftrace in my non-overcommit environment since the expensive memory allocate/mutex/rcu etc operations. This patch optimizes it by recaluating apic map in batch, I hope this can benefit the serverless scenario which can frequently create/destroy VMs. Before patch: kvm_lapic_reset ~27us After patch: kvm_lapic_reset ~14us Observed by ftrace, improve ~48%. Signed-off-by: Wanpeng Li <wanpengli@tencent.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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| .. | ||
| boot | ||
| configs | ||
| crypto | ||
| entry | ||
| events | ||
| hyperv | ||
| ia32 | ||
| include | ||
| kernel | ||
| kvm | ||
| lib | ||
| math-emu | ||
| mm | ||
| net | ||
| oprofile | ||
| pci | ||
| platform | ||
| power | ||
| purgatory | ||
| ras | ||
| realmode | ||
| tools | ||
| um | ||
| video | ||
| xen | ||
| .gitignore | ||
| Kbuild | ||
| Kconfig | ||
| Kconfig.cpu | ||
| Kconfig.debug | ||
| Makefile | ||
| Makefile_32.cpu | ||
| Makefile.um | ||