Marcelo Tosatti 3b6f485275 kvm: reuse per-vcpu stats fd to avoid vcpu interruption ... A regression has been detected in latency testing of KVM guests. More specifically, it was observed that the cyclictest numbers inside of an isolated vcpu (running on isolated pcpu) are: Where a maximum of 50us is acceptable. The implementation of KVM_GET_STATS_FD uses run_on_cpu to query per vcpu statistics, which interrupts the vcpu (and is unnecessary). To fix this, open the per vcpu stats fd on vcpu initialization, and read from that fd from QEMU's main thread. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2023-06-26 10:23:01 +02:00
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accel-cpu.h	accel-cpu: make cpu_realizefn return a bool	2021-05-10 15:41:50 -04:00
cpu.h	kvm: reuse per-vcpu stats fd to avoid vcpu interruption	2023-06-26 10:23:01 +02:00
generic-loader.h	Use OBJECT_DECLARE_SIMPLE_TYPE when possible	2020-09-18 14:12:32 -04:00
split-irq.h	Use OBJECT_DECLARE_SIMPLE_TYPE when possible	2020-09-18 14:12:32 -04:00
sysbus-fdt.h	hw/core: Move the ARM sysbus-fdt to core	2022-04-29 10:48:26 +10:00
sysemu-cpu-ops.h	dump: Replace opaque DumpState pointer with a typed one	2022-10-06 19:30:43 +04:00
tcg-cpu-ops.h	hw/core/cpu: Check for USER_ONLY definition instead of SOFTMMU one	2023-06-20 10:01:30 +02:00