Re: [PATCH 0/2] KVM: PPC: Book3S HV: Dynamic micro-threading/split-core

2015-06-22 Thread Laurent Vivier
On 22/06/2015 02:09, Paul Mackerras wrote: On Wed, Jun 17, 2015 at 07:30:09PM +0200, Laurent Vivier wrote: Tested-by: Laurent Vivier lviv...@redhat.com Performance is better, but Paul could you explain why it is better if I disable dynamic micro-threading ? Did I miss something ? My

Re: [PATCH 0/2] KVM: PPC: Book3S HV: Dynamic micro-threading/split-core

2015-06-22 Thread Laurent Vivier
On 22/06/2015 02:09, Paul Mackerras wrote: On Wed, Jun 17, 2015 at 07:30:09PM +0200, Laurent Vivier wrote: Tested-by: Laurent Vivier lviv...@redhat.com Performance is better, but Paul could you explain why it is better if I disable dynamic micro-threading ? Did I miss something ? My

Re: [PATCH 0/2] KVM: PPC: Book3S HV: Dynamic micro-threading/split-core

2015-06-21 Thread Paul Mackerras
On Wed, Jun 17, 2015 at 07:30:09PM +0200, Laurent Vivier wrote: Tested-by: Laurent Vivier lviv...@redhat.com Performance is better, but Paul could you explain why it is better if I disable dynamic micro-threading ? Did I miss something ? My test system is an IBM Power S822L. I run

Re: [PATCH 0/2] KVM: PPC: Book3S HV: Dynamic micro-threading/split-core

2015-06-21 Thread Paul Mackerras
On Wed, Jun 17, 2015 at 07:30:09PM +0200, Laurent Vivier wrote: Tested-by: Laurent Vivier lviv...@redhat.com Performance is better, but Paul could you explain why it is better if I disable dynamic micro-threading ? Did I miss something ? My test system is an IBM Power S822L. I run

Re: [PATCH 0/2] KVM: PPC: Book3S HV: Dynamic micro-threading/split-core

2015-06-17 Thread Laurent Vivier
[I resend my message because MLs have refused the first one in HTML] On 28/05/2015 07:17, Paul Mackerras wrote: This patch series provides a way to use more of the capacity of each processor core when running guests configured with threads=1, 2 or 4 on a POWER8 host with HV KVM, without having

Re: [PATCH 0/2] KVM: PPC: Book3S HV: Dynamic micro-threading/split-core

2015-06-17 Thread Laurent Vivier
[I resend my message because MLs have refused the first one in HTML] On 28/05/2015 07:17, Paul Mackerras wrote: This patch series provides a way to use more of the capacity of each processor core when running guests configured with threads=1, 2 or 4 on a POWER8 host with HV KVM, without having

[PATCH 0/2] KVM: PPC: Book3S HV: Dynamic micro-threading/split-core

2015-05-27 Thread Paul Mackerras
This patch series provides a way to use more of the capacity of each processor core when running guests configured with threads=1, 2 or 4 on a POWER8 host with HV KVM, without having to change the static micro-threading (the official name for split-core) mode for the whole machine. The problem

[PATCH 0/2] KVM: PPC: Book3S HV: Dynamic micro-threading/split-core

2015-05-27 Thread Paul Mackerras
This patch series provides a way to use more of the capacity of each processor core when running guests configured with threads=1, 2 or 4 on a POWER8 host with HV KVM, without having to change the static micro-threading (the official name for split-core) mode for the whole machine. The problem