On Tue, 2014-06-17 at 14:04 -0500, Caraman Mihai Claudiu-B02008 wrote:
-Original Message-
From: Wood Scott-B07421
Sent: Tuesday, June 17, 2014 6:36 PM
To: Caraman Mihai Claudiu-B02008
Cc: kvm-ppc@vger.kernel.org; k...@vger.kernel.org; linuxppc-
d...@lists.ozlabs.org
Subject: Re: [PATCH v2] KVM: PPC: e500mc: Enhance tlb invalidation
condition on vcpu schedule
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
Thanks. The original code needs just a simple adjustment to benefit from
this optimization, please review v3.
Where is v3? Or is it forthcoming?
-Scott
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