From: "Denis V. Lunev" <den-lists@parallels.com>
To: John Snow <jsnow@redhat.com>, qemu-devel <qemu-devel@nongnu.org>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Subject: Re: [Qemu-devel] Debugging Migration
Date: Wed, 7 Oct 2015 01:40:29 +0300 [thread overview]
Message-ID: <56144DDD.9040304@parallels.com> (raw)
In-Reply-To: <56141712.1010202@redhat.com>
On 10/06/2015 09:46 PM, John Snow wrote:
> Is there a convenient way of "pausing" or stalling a live migration to
> allow methodical testing of race conditions?
>
> I'd like to instrument something along the lines of:
>
> (1) Live migration begins.
> (2) migration is artificially halted or paused, but QEMU is allowed to run.
> (3) Some additional qtest/QMP commands are received and processed.
> (4) migration is allowed to resume.
>
> Does anyone have perhaps even test patches to instrument this sort of
> thing, or is it up to detective john to add it if he wants it?
>
> Thanks,
> --js
>
we have performed some experiments with migration "test mode".
The idea was to estimate the time to migrate and estimate
expected downtime for distributed resource management.
In this mode the migration was not performed but all stuff around
like dirty bitmap was touched.
There are several patches for this in my queue but they are very
hackish.
Will it help you?
Den
next prev parent reply other threads:[~2015-10-06 22:40 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-06 18:46 [Qemu-devel] Debugging Migration John Snow
2015-10-06 19:00 ` Dr. David Alan Gilbert
2015-10-06 22:40 ` Denis V. Lunev [this message]
2015-10-06 23:02 ` John Snow
2015-10-07 6:20 ` [Qemu-devel] [RFC 0/8] QEMUFile-way to gather VM's memory statistics Denis V. Lunev
2015-10-07 6:20 ` [Qemu-devel] [PATCH 1/8] migration: fix expected_downtime Denis V. Lunev
2015-10-07 6:20 ` [Qemu-devel] [PATCH 2/8] qemu-file: new hook in qemu-file Denis V. Lunev
2015-10-07 6:20 ` [Qemu-devel] [PATCH 3/8] migration: add new capability test-only Denis V. Lunev
2015-10-07 15:05 ` Eric Blake
2015-10-08 14:54 ` Denis V. Lunev
2015-10-09 15:19 ` Dr. David Alan Gilbert
2015-10-07 6:20 ` [Qemu-devel] [PATCH 4/8] migration: add function for reseting migration bitmap Denis V. Lunev
2015-10-07 6:20 ` [Qemu-devel] [PATCH 5/8] migration: add draft of new transport Denis V. Lunev
2015-10-07 6:20 ` [Qemu-devel] [PATCH 6/8] migration: implementation of hook_ram_sync Denis V. Lunev
2015-10-07 9:44 ` Paolo Bonzini
2015-10-08 16:51 ` Denis V. Lunev
2015-10-07 9:44 ` Paolo Bonzini
2015-10-08 16:39 ` Denis V. Lunev
2015-10-07 14:03 ` Dr. David Alan Gilbert
2015-10-07 6:20 ` [Qemu-devel] [PATCH 7/8] migration: new migration test mode Denis V. Lunev
2015-10-07 13:56 ` Dr. David Alan Gilbert
2015-10-07 15:08 ` Eric Blake
2015-10-08 17:01 ` Denis V. Lunev
2015-10-08 17:05 ` Dr. David Alan Gilbert
2015-10-08 17:05 ` Denis V. Lunev
2015-10-08 18:57 ` Dr. David Alan Gilbert
2015-10-07 6:20 ` [Qemu-devel] [PATCH 8/8] migration: add output of gathered statistics Denis V. Lunev
2015-10-07 14:19 ` [Qemu-devel] [RFC 0/8] QEMUFile-way to gather VM's memory statistics Dr. David Alan Gilbert
2015-10-07 6:38 ` [Qemu-devel] Debugging Migration Denis V. Lunev
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=56144DDD.9040304@parallels.com \
--to=den-lists@parallels.com \
--cc=dgilbert@redhat.com \
--cc=jsnow@redhat.com \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.