From: Randy Dunlap <rdunlap@infradead.org>
To: Radu Rendec <rrendec@arista.com>, linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>
Subject: Re: Impact of CONFIG_PARAVIRT=y / mmap benchmark
Date: Wed, 29 Mar 2017 08:54:29 -0700 [thread overview]
Message-ID: <2639617f-fe7c-e6cb-c7bf-094a73490228@infradead.org> (raw)
In-Reply-To: <1490721452.1907.25.camel@arista.com>
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
next prev parent reply other threads:[~2017-03-29 15:54 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-28 17:17 Impact of CONFIG_PARAVIRT=y / mmap benchmark Radu Rendec
2017-03-29 15:54 ` Randy Dunlap [this message]
2017-03-29 18:05 ` Ingo Molnar
2017-03-31 10:03 ` Radu Rendec
2017-03-31 17:02 ` Randy Dunlap
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2639617f-fe7c-e6cb-c7bf-094a73490228@infradead.org \
--to=rdunlap@infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=rrendec@arista.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.