linux-kernel - Re: [PATCH 0/2] KVM: x86: Fix incorrect VM-exit profiling

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Message-ID: <YnmqgFkhqWklrQIw@google.com>
Date:   Mon, 9 May 2022 23:57:52 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Wei Zhang <zhanwei@...gle.com>
Cc:     Suleiman Souhlal <suleiman@...gle.com>,
        Sangwhan Moon <sxm@...gle.com>, Ingo Molnar <mingo@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] KVM: x86: Fix incorrect VM-exit profiling

On Tue, Apr 12, 2022, Wei Zhang wrote:
> The profile=kvm boot option has been useful because it provides a
> convenient approach to profile VM exits.

What exactly are you profiling?  Where the guest executing at any given exit?  Mostly
out of curiosity, but also in the hope that we might be able to replace profiling with
a dedicated KVM stat(s).