Re: [Xen-devel] performace issue when turn on apicv

2015-06-18 Thread Jiangyifei
Hi, I'm John's colleague. We looked into the details of the tracing data, and found that the number of MSR_IA32_APICTMICT_MSR event is quite high when apic-v is enabled(about 9x more compared with apic-v disabled). Below is the details: EXIT_REASON_MSR_WRITE apicv on: MSR= 0x0838(MSR_IA32

Re: [Xen-devel] performace issue when turn on apicv

2015-06-21 Thread Jiangyifei
TRC_HVM_EMUL_LAPIC_STOP_TIMER: count=0 I want to know what the bad effects of create_periodic_time() being repeatedly called are. Regards Yifei jiang -Original Message- From: Jan Beulich [mailto:jbeul...@suse.com] Sent: Friday, June 19, 2015 6:43 PM To: Jiangyifei Cc: Liuqiming (John