From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59365) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fsPeT-0002dH-0r for qemu-devel@nongnu.org; Wed, 22 Aug 2018 05:42:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fsPeO-0006JV-IA for qemu-devel@nongnu.org; Wed, 22 Aug 2018 05:42:08 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:53606 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fsPeN-0006Im-MP for qemu-devel@nongnu.org; Wed, 22 Aug 2018 05:42:04 -0400 From: Juan Quintela In-Reply-To: <1533128420-2745-1-git-send-email-liq3ea@gmail.com> (Li Qiang's message of "Wed, 1 Aug 2018 06:00:20 -0700") References: <1533128420-2745-1-git-send-email-liq3ea@gmail.com> Reply-To: quintela@redhat.com Date: Wed, 22 Aug 2018 11:41:55 +0200 Message-ID: <8760027n6k.fsf@trasno.org> MIME-Version: 1.0 Content-Type: text/plain Subject: Re: [Qemu-devel] [PATCH] migrate/cpu-throttle: Add max-cpu-throttle migration parameter List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Li Qiang Cc: dgilbert@redhat.com, eblake@redhat.com, armbru@redhat.com, qemu-devel@nongnu.org, liqiang02@corp.netease.com, hzliuyingdong@corp.netease.com Li Qiang wrote: > Currently, the default maximum CPU throttle for migration is > 99(CPU_THROTTLE_PCT_MAX). This is too big and can make a remarkable > performance effect for the guest. We see a lot of packets latency > exceed 500ms when the CPU_THROTTLE_PCT_MAX reached. This patch set > adds a new max-cpu-throttle parameter to limit the CPU throttle. > > Signed-off-by: Li Qiang Reviewed-by: Juan Quintela