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Re: [Qemu-devel] [PATCH v2] cpu: implementing victim TLB for QEMUsystem


From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH v2] cpu: implementing victim TLB for QEMUsystem emulated TLBB
Date: Sat, 25 Jan 2014 09:28:24 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0

Il 24/01/2014 23:32, BALATON Zoltan ha scritto:
On Fri, 24 Jan 2014, Alex Bennée wrote:
address@hidden writes:
Attaching data in excel which could not be sent with the patch at the
same time.

<snip>

If you can attach the summary of the data as plain text that would be
useful. Not all of us have access to a Windows box with Excell!

Opens on LibreOffice as well but plain text is easier to read.

I wonder how much of the measured performance increase is due to the
increased effective cache size and how much is the reduction in number
of instructions by the victim TLB mechanism. Wouldn't it be a more fair
measurement to use a bigger TLB size for the TLB only case that matches
the effective size of the TLB+victim case instead of using the same TLB
size for both?

That's quite unlikely, the TLB size is 256 while TLB+victim is 264.

Paolo



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