From: Paolo Bonzini <pbonzini@redhat.com>
To: Bandan Das <bsd@redhat.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [RFC PATCH 1/4] KVM: emulate: speed up do_insn_fetch
Date: Wed, 07 May 2014 10:32:29 +0200 [thread overview]
Message-ID: <5369EF9D.90905@redhat.com> (raw)
In-Reply-To: <jpgk39yiam1.fsf@nelium.bos.redhat.com>
Il 07/05/2014 04:30, Bandan Das ha scritto:
>> > + if (unlikely(ctxt->_eip == fc->end)) {
> Is this really going to be unlikely ?
>
Yes, it happens at most once per instruction and only for instructions
that cross pages.
Paolo
next prev parent reply other threads:[~2014-05-07 8:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-06 18:16 [RFC PATCH 0/4] KVM: emulator: speed up instruction fetch Paolo Bonzini
2014-05-06 18:16 ` [RFC PATCH 1/4] KVM: emulate: speed up do_insn_fetch Paolo Bonzini
2014-05-07 2:30 ` Bandan Das
2014-05-07 8:32 ` Paolo Bonzini [this message]
2014-05-06 18:16 ` [RFC PATCH 2/4] KVM: emulate: avoid repeated calls to do_insn_fetch_bytes Paolo Bonzini
2014-05-07 4:21 ` Bandan Das
2014-05-07 8:34 ` Paolo Bonzini
2014-05-06 18:16 ` [RFC PATCH 3/4] KVM: emulate: avoid per-byte copying in instruction fetches Paolo Bonzini
2014-05-07 4:36 ` Bandan Das
2014-05-07 8:40 ` Paolo Bonzini
2014-05-06 18:16 ` [RFC PATCH 4/4] KVM: emulate: put pointers in the fetch_cache Paolo Bonzini
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