> -----Original Message----- > From: Wood Scott-B07421 > Sent: Tuesday, June 17, 2014 6:36 PM > To: Caraman Mihai Claudiu-B02008 > Cc: kvm-ppc@xxxxxxxxxxxxxxx; kvm@xxxxxxxxxxxxxxx; linuxppc- > dev@xxxxxxxxxxxxxxxx > 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. - Mike ��.n��������+%������w��{.n�����o�^n�r������&��z�ޗ�zf���h���~����������_��+v���)ߣ�
