Rob Bradford 0fec326582 hypervisor, vmm: Remove shared ownership of VmmOps ... This interface is used by the vCPU thread to delegate responsibility for handling MMIO/PIO operations and to support different approaches than a VM exit. During profiling I found that we were spending 13.75% of the boot CPU uage acquiring access to the object holding the VmmOps via ArcSwap::load_full() 13.75% 6.02% vcpu0 cloud-hypervisor [.] arc_swap::ArcSwapAny<T,S>::load_full | ---arc_swap::ArcSwapAny<T,S>::load_full | --13.43%--<hypervisor::kvm::KvmVcpu as hypervisor::cpu::Vcpu>::run std::sys_common::backtrace::__rust_begin_short_backtrace core::ops::function::FnOnce::call_once{{vtable-shim}} std::sys::unix:🧵:Thread:🆕:thread_start However since the object implementing VmmOps does not need to be mutable and it is only used from the vCPU side we can change the ownership to being a simple Arc<> that is passed in when calling create_vcpu(). This completely removes the above CPU usage from subsequent profiles. Signed-off-by: Rob Bradford <robert.bradford@intel.com>		2020-11-19 00:16:02 +01:00
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src	hypervisor, vmm: Remove shared ownership of VmmOps	2020-11-19 00:16:02 +01:00
Cargo.toml	build: Update arc-swap dependency to 1.0.0	2020-11-16 14:10:09 +01:00