From: Wanpeng Li <kernellwp@gmail.com>
To: Li RongQing <lirongqing@baidu.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>, kvm <kvm@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] KVM: Consider SMT idle status when halt polling
Date: Thu, 22 Jul 2021 13:55:06 +0800 [thread overview]
Message-ID: <CANRm+Cx-5Yyxx5A4+qkYa01MG4BCdwXPd++bmxzOid+XL267cQ@mail.gmail.com> (raw)
In-Reply-To: <20210722035807.36937-1-lirongqing@baidu.com>
On Thu, 22 Jul 2021 at 12:07, Li RongQing <lirongqing@baidu.com> wrote:
>
> SMT siblings share caches and other hardware, halt polling
> will degrade its sibling performance if its sibling is busy
Do you have any real scenario benefits? As the polling nature, some
cloud providers will configure to their preferred balance of cpu usage
and performance, and other cloud providers for their NFV scenarios
which are more sensitive to latency are vCPU and pCPU 1:1 pin，you
destroy these setups.
Wanpeng
next prev parent reply other threads:[~2021-07-22 5:55 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-22 3:58 [PATCH] KVM: Consider SMT idle status when halt polling Li RongQing
2021-07-22 4:15 ` Mika Penttilä
2021-07-22 5:22 ` 答复: " Li,Rongqing
2021-07-22 5:55 ` Wanpeng Li [this message]
2021-07-22 7:10 ` Li,Rongqing
2021-07-22 12:16 ` Li,Rongqing
2021-07-27 1:25 ` Sean Christopherson
2021-07-27 6:39 ` 答复: " Li,Rongqing
2021-07-22 13:35 ` kernel test robot
2021-07-22 14:52 ` kernel test robot
2021-07-22 15:07 ` Dongli Zhang
2021-07-22 15:20 ` Dongli Zhang
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