Re: About MONITOR/MWAIT in i386 CPU model

2019-11-13 Thread Tao Xu
On 11/14/2019 6:47 AM, Eduardo Habkost wrote: On Wed, Nov 13, 2019 at 04:42:25PM +0800, Tao Xu wrote: Hi Eduardo, After kvm use "-overcommit cpu-pm=on" to expose MONITOR/MWAIT (commit id 6f131f13e68d648a8e4f083c667ab1acd88ce4cd), the MONITOR/MWAIT feature in CPU model (phenom core2duo coreduo

Re: About MONITOR/MWAIT in i386 CPU model

2019-11-13 Thread Eduardo Habkost
On Wed, Nov 13, 2019 at 04:42:25PM +0800, Tao Xu wrote: > Hi Eduardo, > > After kvm use "-overcommit cpu-pm=on" to expose MONITOR/MWAIT > (commit id 6f131f13e68d648a8e4f083c667ab1acd88ce4cd), the MONITOR/MWAIT > feature in CPU model (phenom core2duo coreduo n270 Opteron_G3 EPYC Snowridge >

About MONITOR/MWAIT in i386 CPU model

2019-11-13 Thread Tao Xu
Hi Eduardo, After kvm use "-overcommit cpu-pm=on" to expose MONITOR/MWAIT (commit id 6f131f13e68d648a8e4f083c667ab1acd88ce4cd), the MONITOR/MWAIT feature in CPU model (phenom core2duo coreduo n270 Opteron_G3 EPYC Snowridge Denverton) may be unused. For example, when we boot a guest with