From: Avi Kivity <avi@redhat.com>
To: Juan Quintela <quintela@redhat.com>
Cc: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>,
Paolo Bonzini <pbonzini@redhat.com>,
qemu-devel@nongnu.org, kvm-devel <kvm@vger.kernel.org>
Subject: [Qemu-devel] Re: [PATCH 09/10] Exit loop if we have been there too long
Date: Wed, 01 Dec 2010 14:35:57 +0200 [thread overview]
Message-ID: <4CF6412D.5030601@redhat.com> (raw)
In-Reply-To: <m3pqtm1cqf.fsf@trasno.mitica>
On 12/01/2010 03:52 AM, Juan Quintela wrote:
> > - 512GB guest is really the target?
>
> no, problems exist with smaller amounts of RAM. with 16GB guest it is
> trivial to get 1s stalls, 64GB guest, 3-4s, with more memory, migration
> is flaky to say the less.
>
> > - how much cpu time can we use for these things?
>
> the problem here is that we are forced to walk the bitmap too many
> times, we want to do it less times.
How much time is spent walking bitmaps? Are you sure this is the problem?
> > - how many dirty pages do we have to care?
>
> default values and assuming 1Gigabit ethernet for ourselves ~9.5MB of
> dirty pages to have only 30ms of downtime.
1Gb/s * 30ms = 100 MB/s * 30 ms = 3 MB.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-12-01 12:36 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-23 23:02 [Qemu-devel] [PATCH 00/10] Fix migration with lots of memory Juan Quintela
2010-11-23 23:02 ` [Qemu-devel] [PATCH 01/10] Add spent time to migration Juan Quintela
2010-11-23 23:02 ` [Qemu-devel] [PATCH 02/10] Add buffered_file_internal constant Juan Quintela
2010-11-24 10:40 ` [Qemu-devel] " Michael S. Tsirkin
2010-11-24 10:52 ` Juan Quintela
2010-11-24 11:04 ` Michael S. Tsirkin
2010-11-24 11:13 ` Juan Quintela
2010-11-24 11:19 ` Michael S. Tsirkin
[not found] ` <4CF46012.2060804@codemonkey.ws>
2010-11-30 11:56 ` Juan Quintela
2010-11-30 14:02 ` Anthony Liguori
2010-11-30 14:11 ` Michael S. Tsirkin
2010-11-30 14:22 ` Anthony Liguori
2010-11-30 15:40 ` Juan Quintela
2010-11-30 16:10 ` Michael S. Tsirkin
2010-11-30 16:32 ` Juan Quintela
2010-11-30 16:44 ` Anthony Liguori
2010-11-30 18:04 ` Juan Quintela
2010-11-30 18:54 ` Anthony Liguori
2010-11-30 19:15 ` Juan Quintela
2010-11-30 20:23 ` Anthony Liguori
2010-11-30 20:56 ` Juan Quintela
2010-11-23 23:03 ` [Qemu-devel] [PATCH 03/10] Add printf debug to savevm Juan Quintela
[not found] ` <4CF45AB2.7050506@codemonkey.ws>
2010-11-30 10:36 ` Stefan Hajnoczi
2010-11-30 22:40 ` [Qemu-devel] " Juan Quintela
2010-12-01 7:50 ` Stefan Hajnoczi
2010-11-23 23:03 ` [Qemu-devel] [PATCH 04/10] No need to iterate if we already are over the limit Juan Quintela
2010-11-23 23:03 ` [Qemu-devel] [PATCH 05/10] KVM don't care about TLB handling Juan Quintela
2010-11-23 23:03 ` [Qemu-devel] [PATCH 06/10] Only calculate expected_time for stage 2 Juan Quintela
2010-11-23 23:03 ` [Qemu-devel] [PATCH 07/10] ram_save_remaining() returns an uint64_t Juan Quintela
[not found] ` <4CF45C0C.705@codemonkey.ws>
2010-11-30 7:21 ` [Qemu-devel] " Paolo Bonzini
2010-11-30 13:44 ` Anthony Liguori
2010-11-30 14:38 ` Juan Quintela
2010-11-23 23:03 ` [Qemu-devel] [PATCH 08/10] Count nanoseconds with uint64_t not doubles Juan Quintela
2010-11-30 7:17 ` [Qemu-devel] " Paolo Bonzini
[not found] ` <4CF45C5B.9080507@codemonkey.ws>
2010-11-30 14:40 ` Juan Quintela
2010-11-23 23:03 ` [Qemu-devel] [PATCH 09/10] Exit loop if we have been there too long Juan Quintela
2010-11-24 10:40 ` [Qemu-devel] " Michael S. Tsirkin
2010-11-24 11:01 ` Juan Quintela
2010-11-24 11:14 ` Michael S. Tsirkin
2010-11-24 15:16 ` Paolo Bonzini
2010-11-24 15:59 ` Michael S. Tsirkin
[not found] ` <4CF45E3F.4040609@codemonkey.ws>
2010-11-30 8:10 ` Paolo Bonzini
2010-11-30 13:26 ` Juan Quintela
[not found] ` <4CF45D67.5010906@codemonkey.ws>
2010-11-30 7:15 ` Paolo Bonzini
2010-11-30 13:47 ` Anthony Liguori
2010-11-30 13:58 ` Avi Kivity
2010-11-30 14:17 ` Anthony Liguori
2010-11-30 14:27 ` Avi Kivity
2010-11-30 14:50 ` Anthony Liguori
2010-12-01 12:40 ` Avi Kivity
2010-11-30 17:43 ` Juan Quintela
2010-12-01 1:20 ` Takuya Yoshikawa
2010-12-01 1:52 ` Juan Quintela
2010-12-01 2:22 ` Takuya Yoshikawa
2010-12-01 12:35 ` Avi Kivity [this message]
2010-12-01 13:45 ` Juan Quintela
2010-12-02 1:31 ` Takuya Yoshikawa
2010-12-02 8:37 ` Avi Kivity
2010-11-30 14:12 ` Paolo Bonzini
2010-11-30 15:00 ` Anthony Liguori
2010-11-30 17:59 ` Juan Quintela
2010-11-23 23:03 ` [Qemu-devel] [PATCH 10/10] Maintaing number of dirty pages Juan Quintela
[not found] ` <4CF45DE0.8020701@codemonkey.ws>
2010-11-30 14:46 ` [Qemu-devel] " Juan Quintela
2010-12-01 14:46 ` Avi Kivity
2010-12-01 15:51 ` Juan Quintela
2010-12-01 15:55 ` Anthony Liguori
2010-12-01 16:25 ` Juan Quintela
2010-12-01 16:33 ` Anthony Liguori
2010-12-01 16:43 ` Avi Kivity
2010-12-01 16:49 ` Anthony Liguori
2010-12-01 16:52 ` Avi Kivity
2010-12-01 16:56 ` Anthony Liguori
2010-12-01 17:01 ` Avi Kivity
2010-12-01 17:05 ` Anthony Liguori
2010-12-01 18:51 ` Juan Quintela
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