From: Borislav Petkov <bp@alien8.de>
To: Liam Ni <zhiguangni01@gmail.com>
Cc: seanjc@google.com, pbonzini@redhat.com, tglx@linutronix.de,
mingo@redhat.com, dave.hansen@linux.intel.com, hpa@zytor.com,
x86@kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] KVM:make cpuid_entry2_find more efficient
Date: Tue, 9 Aug 2022 09:54:58 +0200 [thread overview]
Message-ID: <YvIS0nvStyUYR7ep@zn.tnic> (raw)
In-Reply-To: <20220809055138.101470-1-zhiguangni01@gmail.com>
On Tue, Aug 09, 2022 at 01:51:38PM +0800, Liam Ni wrote:
> Compared with the way of obtaining the pointer by
> fetching the value of the array and then fetching the pointer,
> the way of obtaining the pointer by the pointer offset is more efficient.
How did you determine that?
Hint: look at the generated assembler before and after your change and
see if there are any differences.
:-)
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
prev parent reply other threads:[~2022-08-09 7:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-09 5:51 [PATCH] KVM:make cpuid_entry2_find more efficient Liam Ni
2022-08-09 7:54 ` Borislav Petkov [this message]
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