From: Paolo Bonzini <pbonzini@redhat.com>
To: Thomas Monjalon <thomas.monjalon@6wind.com>
Cc: "De Lara Guarch, Pablo" <pablo.de.lara.guarch@intel.com>,
dev@dpdk.org, "Carew, Alan" <alan.carew@intel.com>,
qemu-devel@nongnu.org
Subject: Re: [dpdk-dev] [PATCH v4 00/10] VM Power Management
Date: Fri, 12 Dec 2014 17:13:55 +0100 [thread overview]
Message-ID: <548B1443.6060706@redhat.com> (raw)
In-Reply-To: <6597811.ARdDfzU0XI@xps13>
On 12/12/2014 17:10, Thomas Monjalon wrote:
> > Ok, this looks specific enough that an out-of-band solution within DPDK
> > sounds like the best approach. It seems unnecessary to involve the
> > hypervisor (neither KVM nor QEMU).
>
> Paolo, I don't understand why you don't imagine controlling frequency scaling
> of a pinned vCPU transparently?
Probably because I don't imagine controlling frequency scaling from the
application on bare metal, either. :) It seems to me that this is just
working around limitations of the kernel.
Paolo
> In my understanding, we currently cannot control frequency scaling without
> knowing wether we are in a VM or not.
WARNING: multiple messages have this Message-ID (diff)
From: Paolo Bonzini <pbonzini@redhat.com>
To: Thomas Monjalon <thomas.monjalon@6wind.com>
Cc: "De Lara Guarch, Pablo" <pablo.de.lara.guarch@intel.com>,
dev@dpdk.org, "Carew, Alan" <alan.carew@intel.com>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [dpdk-dev] [PATCH v4 00/10] VM Power Management
Date: Fri, 12 Dec 2014 17:13:55 +0100 [thread overview]
Message-ID: <548B1443.6060706@redhat.com> (raw)
In-Reply-To: <6597811.ARdDfzU0XI@xps13>
On 12/12/2014 17:10, Thomas Monjalon wrote:
> > Ok, this looks specific enough that an out-of-band solution within DPDK
> > sounds like the best approach. It seems unnecessary to involve the
> > hypervisor (neither KVM nor QEMU).
>
> Paolo, I don't understand why you don't imagine controlling frequency scaling
> of a pinned vCPU transparently?
Probably because I don't imagine controlling frequency scaling from the
application on bare metal, either. :) It seems to me that this is just
working around limitations of the kernel.
Paolo
> In my understanding, we currently cannot control frequency scaling without
> knowing wether we are in a VM or not.
next prev parent reply other threads:[~2014-12-12 16:13 UTC|newest]
Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-22 18:34 [PATCH 00/10] VM Power Management Alan Carew
[not found] ` <1411410879-28872-1-git-send-email-alan.carew-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-09-22 18:34 ` [PATCH 01/10] Channel Manager and Monitor for VM Power Management(Host) Alan Carew
2014-09-22 18:34 ` [PATCH 02/10] VM Power Management CLI(Host) Alan Carew
2014-09-22 18:34 ` [PATCH 03/10] CPU Frequency Power Management(Host) Alan Carew
2014-09-22 18:34 ` [PATCH 04/10] " Alan Carew
2014-09-22 18:34 ` [PATCH 05/10] VM communication channels for VM Power Management(Guest) Alan Carew
2014-09-22 18:34 ` [PATCH 06/10] Alternate implementation of librte_power " Alan Carew
[not found] ` <1411410879-28872-7-git-send-email-alan.carew-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-09-22 19:17 ` Neil Horman
[not found] ` <20140922191753.GH25406-B26myB8xz7F8NnZeBjwnZQMhkBWG/bsMQH7oEaQurus@public.gmane.org>
2014-09-23 7:48 ` Carew, Alan
2014-09-22 18:34 ` [PATCH 07/10] Packet format for VM Power Management(Host and Guest) Alan Carew
2014-09-22 18:34 ` [PATCH 08/10] Build system integration for VM Power Management(Guest and Host) Alan Carew
2014-09-22 18:34 ` [PATCH 09/10] VM Power Management Unit Tests(Guest) Alan Carew
2014-09-22 18:34 ` [PATCH 10/10] VM Power Management CLI(Guest) Alan Carew
2014-09-24 17:26 ` [PATCH v2 00/10] VM Power Management Alan Carew
[not found] ` <1411579576-21786-1-git-send-email-alan.carew-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-09-24 17:26 ` [PATCH v2 01/10] Channel Manager and Monitor for VM Power Management(Host) Alan Carew
2014-09-24 17:26 ` [PATCH v2 02/10] VM Power Management CLI(Host) Alan Carew
2014-09-24 17:26 ` [PATCH v2 03/10] CPU Frequency Power Management(Host) Alan Carew
2014-09-24 17:26 ` [PATCH v2 04/10] VM Power Management application and Makefile Alan Carew
2014-09-24 17:26 ` [PATCH v2 05/10] VM Power Management CLI(Guest) Alan Carew
2014-09-24 17:26 ` [PATCH v2 06/10] VM communication channels for VM Power Management(Guest) Alan Carew
2014-09-24 17:26 ` [PATCH v2 07/10] librte_power common interface for Guest and Host Alan Carew
[not found] ` <1411579576-21786-8-git-send-email-alan.carew-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-09-25 10:10 ` Neil Horman
[not found] ` <20140925101003.GA32725-B26myB8xz7F8NnZeBjwnZQMhkBWG/bsMQH7oEaQurus@public.gmane.org>
2014-09-25 17:06 ` Carew, Alan
[not found] ` <0E29434AEE0C3A4180987AB476A6F6306D278070-kPTMFJFq+rHjxeytcECX8bfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2014-09-25 17:49 ` Neil Horman
2014-09-24 17:26 ` [PATCH v2 08/10] Packet format for VM Power Management(Host and Guest) Alan Carew
2014-09-24 17:26 ` [PATCH v2 09/10] Build system integration for VM Power Management(Guest and Host) Alan Carew
2014-09-24 17:26 ` [PATCH v2 10/10] VM Power Management Unit Tests Alan Carew
2014-09-25 2:56 ` [PATCH v2 00/10] VM Power Management Liu, Yong
2014-09-29 15:18 ` [PATCH v3 " Alan Carew
[not found] ` <1412003903-9061-1-git-send-email-alan.carew-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-09-29 15:18 ` [PATCH v3 01/10] Channel Manager and Monitor for VM Power Management(Host) Alan Carew
2014-09-29 15:18 ` [PATCH v3 02/10] VM Power Management CLI(Host) Alan Carew
2014-09-29 15:18 ` [PATCH v3 03/10] CPU Frequency Power Management(Host) Alan Carew
2014-09-29 15:18 ` [PATCH v3 04/10] VM Power Management application and Makefile Alan Carew
2014-09-29 15:18 ` [PATCH v3 05/10] VM Power Management CLI(Guest) Alan Carew
2014-09-29 15:18 ` [PATCH v3 06/10] VM communication channels for VM Power Management(Guest) Alan Carew
2014-09-29 15:18 ` [PATCH v3 07/10] librte_power common interface for Guest and Host Alan Carew
2014-09-29 15:18 ` [PATCH v3 08/10] Packet format for VM Power Management(Host and Guest) Alan Carew
2014-09-29 15:18 ` [PATCH v3 09/10] Build system integration for VM Power Management(Guest and Host) Alan Carew
2014-09-29 15:18 ` [PATCH v3 10/10] VM Power Management Unit Tests Alan Carew
2014-09-29 17:29 ` [PATCH v3 00/10] VM Power Management Neil Horman
2014-10-12 19:36 ` [PATCH v4 " Alan Carew
[not found] ` <1413142571-23069-1-git-send-email-alan.carew-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-10-12 19:36 ` [PATCH v4 01/10] Channel Manager and Monitor for VM Power Management(Host) Alan Carew
2014-10-12 19:36 ` [PATCH v4 02/10] VM Power Management CLI(Host) Alan Carew
2014-10-12 19:36 ` [PATCH v4 03/10] CPU Frequency Power Management(Host) Alan Carew
2014-10-12 19:36 ` [PATCH v4 04/10] VM Power Management application and Makefile Alan Carew
[not found] ` <1413142571-23069-5-git-send-email-alan.carew-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-10-16 18:28 ` De Lara Guarch, Pablo
2014-10-12 19:36 ` [PATCH v4 05/10] VM Power Management CLI(Guest) Alan Carew
2014-10-12 19:36 ` [PATCH v4 06/10] VM communication channels for VM Power Management(Guest) Alan Carew
2014-10-12 19:36 ` [PATCH v4 07/10] librte_power common interface for Guest and Host Alan Carew
2014-10-12 19:36 ` [PATCH v4 08/10] Packet format for VM Power Management(Host and Guest) Alan Carew
2014-10-12 19:36 ` [PATCH v4 09/10] Build system integration for VM Power Management(Guest and Host) Alan Carew
2014-10-12 19:36 ` [PATCH v4 10/10] VM Power Management Unit Tests Alan Carew
2014-10-13 6:17 ` [PATCH v4 00/10] VM Power Management Liu, Yong
2014-10-13 20:26 ` Thomas Monjalon
2014-10-14 12:37 ` Carew, Alan
[not found] ` <0E29434AEE0C3A4180987AB476A6F6306D28093B-kPTMFJFq+rHjxeytcECX8bfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2014-10-14 15:03 ` Thomas Monjalon
2014-10-16 15:21 ` Carew, Alan
[not found] ` <0E29434AEE0C3A4180987AB476A6F6306D2811AD-kPTMFJFq+rHjxeytcECX8bfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2014-10-28 15:21 ` Thomas Monjalon
2014-11-10 9:05 ` Carew, Alan
[not found] ` <0E29434AEE0C3A4180987AB476A6F6306D28E7DF-kPTMFJFq+rHjxeytcECX8bfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2014-11-10 17:54 ` O'driscoll, Tim
[not found] ` <26FA93C7ED1EAA44AB77D62FBE1D27BA54C4BD63-kPTMFJFq+rFP9JyJpTNKArfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2014-11-21 23:51 ` Zhu, Heqing
2014-11-22 17:17 ` Vincent JARDIN
2014-11-22 17:17 ` [Qemu-devel] [dpdk-dev] " Vincent JARDIN
[not found] ` <5470C514.3080307-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2014-12-09 17:35 ` Paolo Bonzini
2014-12-09 17:35 ` [Qemu-devel] " Paolo Bonzini
[not found] ` <548732C9.2020201-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-12-11 23:18 ` Thomas Monjalon
2014-12-11 23:18 ` [Qemu-devel] [dpdk-dev] " Thomas Monjalon
2014-12-12 13:00 ` Carew, Alan
2014-12-12 13:00 ` [Qemu-devel] [dpdk-dev] " Carew, Alan
2014-12-12 14:50 ` Paolo Bonzini
2014-12-12 14:50 ` [Qemu-devel] " Paolo Bonzini
[not found] ` <548B00B3.8040201-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-12-12 16:10 ` Thomas Monjalon
2014-12-12 16:10 ` [Qemu-devel] [dpdk-dev] " Thomas Monjalon
2014-12-12 16:13 ` Paolo Bonzini [this message]
2014-12-12 16:13 ` Paolo Bonzini
2014-11-21 17:42 ` [PATCH v5 00/10] Virtual Machine " Pablo de Lara
[not found] ` <1416591732-3735-1-git-send-email-pablo.de.lara.guarch-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-11-21 17:42 ` [PATCH v5 01/10] Channel Manager and Monitor for VM Power Management(Host) Pablo de Lara
2014-11-21 17:42 ` [PATCH v5 02/10] VM Power Management CLI(Host) Pablo de Lara
2014-11-21 17:42 ` [PATCH v5 03/10] CPU Frequency Power Management(Host) Pablo de Lara
2014-11-21 17:42 ` [PATCH v5 04/10] VM Power Management application and Makefile Pablo de Lara
2014-11-21 17:42 ` [PATCH v5 05/10] VM Power Management CLI(Guest) Pablo de Lara
2014-11-21 17:42 ` [PATCH v5 06/10] VM communication channels for VM Power Management(Guest) Pablo de Lara
2014-11-21 17:42 ` [PATCH v5 07/10] librte_power common interface for Guest and Host Pablo de Lara
2014-11-21 17:42 ` [PATCH v5 08/10] Packet format for VM Power Management(Host and Guest) Pablo de Lara
2014-11-21 17:42 ` [PATCH v5 09/10] Build system integration for VM Power Management(Guest and Host) Pablo de Lara
2014-11-21 17:42 ` [PATCH v5 10/10] VM Power Management Unit Tests Pablo de Lara
2014-11-25 16:18 ` [PATCH v6 00/10] Virtual Machine Power Management Pablo de Lara
[not found] ` <1416932291-13162-1-git-send-email-pablo.de.lara.guarch-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-11-25 16:18 ` [PATCH v6 01/10] Channel Manager and Monitor for VM Power Management(Host) Pablo de Lara
[not found] ` <1416932291-13162-2-git-send-email-pablo.de.lara.guarch-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-11-29 15:21 ` Neil Horman
2014-11-25 16:18 ` [PATCH v6 02/10] VM Power Management CLI(Host) Pablo de Lara
2014-11-25 16:18 ` [PATCH v6 03/10] CPU Frequency Power Management(Host) Pablo de Lara
2014-11-25 16:18 ` [PATCH v6 04/10] VM Power Management application and Makefile Pablo de Lara
2014-11-25 16:18 ` [PATCH v6 05/10] VM Power Management CLI(Guest) Pablo de Lara
2014-11-25 16:18 ` [PATCH v6 06/10] VM communication channels for VM Power Management(Guest) Pablo de Lara
2014-11-25 16:18 ` [PATCH v6 07/10] librte_power common interface for Guest and Host Pablo de Lara
2014-11-25 16:18 ` [PATCH v6 08/10] Packet format for VM Power Management(Host and Guest) Pablo de Lara
2014-11-25 16:18 ` [PATCH v6 09/10] Build system integration for VM Power Management(Guest and Host) Pablo de Lara
2014-11-25 16:18 ` [PATCH v6 10/10] VM Power Management Unit Tests Pablo de Lara
2014-11-26 16:41 ` [PATCH v6 00/10] Virtual Machine Power Management Thomas Monjalon
2014-11-10 9:19 ` [PATCH v2] librte_cmdline: FreeBSD Fix oveflow when size of command result structure is greater than BUFSIZ Alan Carew
[not found] ` <1415611146-32368-1-git-send-email-alan.carew-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2014-12-05 14:16 ` Olivier MATZ
[not found] ` <5481BE26.9080903-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2014-12-05 14:19 ` [PATCH v3] " Olivier Matz
[not found] ` <1417789147-5636-1-git-send-email-olivier.matz-pdR9zngts4EAvxtiuMwx3w@public.gmane.org>
2014-12-05 15:51 ` Bruce Richardson
2014-12-05 15:58 ` Thomas Monjalon
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