Re: [Xen-devel] [PATCH RFC v3 0/6] x86/idle: add halt poll support

2017-11-22 Thread Quan Xu
On 2017-11-16 05:31, Konrad Rzeszutek Wilk wrote: On Mon, Nov 13, 2017 at 06:05:59PM +0800, Quan Xu wrote: From: Yang Zhang Some latency-intensive workload have seen obviously performance drop when running inside VM. The main reason is that the overhead is amplified

Re: [PATCH RFC v3 0/6] x86/idle: add halt poll support

2017-11-22 Thread Xu Quan
2017-11-15 20:13 GMT+08:00 Peter Zijlstra : > On Mon, Nov 13, 2017 at 07:01:40PM +0800, Quan Xu wrote: > > Documentation/sysctl/kernel.txt | 35 > > arch/x86/include/asm/paravirt.h |5 ++ > > arch/x86/include/asm/paravirt_types.h |6

[PATCH RFC v3 0/6] x86/idle: add halt poll support

2017-11-22 Thread Quan Xu
From: Quan Xu Some latency-intensive workload have seen obviously performance drop when running inside VM. The main reason is that the overhead is amplified when running inside VM. The most cost I have seen is inside idle path. This patch introduces a new mechanism to poll

[PATCH RFC v3 0/6] x86/idle: add halt poll support

2017-11-22 Thread Quan Xu
From: Yang Zhang Some latency-intensive workload have seen obviously performance drop when running inside VM. The main reason is that the overhead is amplified when running inside VM. The most cost I have seen is inside idle path. This patch introduces a new mechanism

[PATCH RFC v3 0/6] x86/idle: add halt poll support

2017-11-22 Thread Quan Xu
From: Yang Zhang Some latency-intensive workload have seen obviously performance drop when running inside VM. The main reason is that the overhead is amplified when running inside VM. The most cost I have seen is inside idle path. This patch introduces a new mechanism

Re: [Xen-devel] [PATCH RFC v3 0/6] x86/idle: add halt poll support

2017-11-15 Thread Konrad Rzeszutek Wilk
On Mon, Nov 13, 2017 at 06:05:59PM +0800, Quan Xu wrote: > From: Yang Zhang > > Some latency-intensive workload have seen obviously performance > drop when running inside VM. The main reason is that the overhead > is amplified when running inside VM. The most cost I have

Re: [PATCH RFC v3 0/6] x86/idle: add halt poll support

2017-11-15 Thread Peter Zijlstra
On Mon, Nov 13, 2017 at 07:01:40PM +0800, Quan Xu wrote: > Documentation/sysctl/kernel.txt | 35 > arch/x86/include/asm/paravirt.h |5 ++ > arch/x86/include/asm/paravirt_types.h |6 +++ > arch/x86/kernel/kvm.c | 73 >