From: Scott Wood <scottwood@freescale.com>
To: Mihai Caraman <mihai.caraman@freescale.com>
Cc: linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org,
kvm-ppc@vger.kernel.org
Subject: Re: [PATCH v2] KVM: PPC: e500mc: Enhance tlb invalidation condition on vcpu schedule
Date: Tue, 17 Jun 2014 10:35:43 -0500 [thread overview]
Message-ID: <1403019343.6603.723.camel@snotra.buserror.net> (raw)
In-Reply-To: <1402995739-23756-1-git-send-email-mihai.caraman@freescale.com>
On Tue, 2014-06-17 at 12:02 +0300, Mihai Caraman wrote:
> On vcpu schedule, the condition checked for tlb pollution is too loose.
> The tlb entries of a vcpu become polluted (vs stale) only when a different
> vcpu within the same logical partition runs in-between. Optimize the tlb
> invalidation condition taking into account the logical partition id.
>
> With the new invalidation condition, a guest shows 4% performance improvement
> on P5020DS while running a memory stress application with the cpu oversubscribed,
> the other guest running a cpu intensive workload.
See
https://lists.ozlabs.org/pipermail/linuxppc-dev/2014-June/118547.html
-Scott
next prev parent reply other threads:[~2014-06-17 15:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-17 9:02 [PATCH v2] KVM: PPC: e500mc: Enhance tlb invalidation condition on vcpu schedule Mihai Caraman
2014-06-17 15:35 ` Scott Wood [this message]
2014-06-17 19:04 ` mihai.caraman
2014-06-17 19:05 ` Scott Wood
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=1403019343.6603.723.camel@snotra.buserror.net \
--to=scottwood@freescale.com \
--cc=kvm-ppc@vger.kernel.org \
--cc=kvm@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mihai.caraman@freescale.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).