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Date: Wed, 29 Mar 2017 08:54:29 -0700 From: Randy Dunlap <rdunlap@...radead.org> To: Radu Rendec <rrendec@...sta.com>, linux-kernel@...r.kernel.org Cc: Ingo Molnar <mingo@...nel.org> Subject: Re: Impact of CONFIG_PARAVIRT=y / mmap benchmark On 03/28/17 10:17, Radu Rendec wrote: > Hi, > > I'm trying to assess the performance impact of enabling PARAVIRT (and > XEN) in a custom kernel configuration. I came across a very old thread > (https://lkml.org/lkml/2009/5/13/449) on this topic and the conclusion > back then was that the performance impact was (arguably) around 1%. > > Does anyone still have a copy of Ingo Molnar's mmap-perf.c program (the > old link is broken)? Would it still be relevant to use it for measuring > performance in case of PARAVIRT? > > Last but not least, has anyone looked into PARAVIRT performance more > recently? > > Thank you! > > Best regards, > Radu Rendec I have mmap-perf.c that says: /* Copyright Ingo Molnar (c) 2006 */ and no license info... Ingo? -- ~Randy
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