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From: Peter Xu <peterx@redhat.com>
To: Chuang Xu <xuchuangxclwt@bytedance.com>
Cc: qemu-devel@nongnu.org, dgilbert@redhat.com, quintela@redhat.com,
	pbonzini@redhat.com, david@redhat.com, f4bug@amsat.org,
	mst@redhat.com, zhouyibo@bytedance.com
Subject: Re: [RFC v3 0/3] migration: reduce time of loading non-iterable vmstate
Date: Fri, 16 Dec 2022 12:11:57 -0500	[thread overview]
Message-ID: <Y5ym3ayBoRNxzT5s@x1n> (raw)
In-Reply-To: <20221213133510.1279488-1-xuchuangxclwt@bytedance.com>

Chuang,

On Tue, Dec 13, 2022 at 09:35:07PM +0800, Chuang Xu wrote:
> Here are the test results:
> test vm info:
> - 32 CPUs 128GB RAM
> - 8 16-queue vhost-net device
> - 16 4-queue vhost-user-blk device.
> 
> 	time of loading non-iterable vmstate
> before		about 210 ms
> after		about 40 ms

It'll be also great if you can attach more information in the cover letter
in the next post.  For example:

  - Per your investigation, what's the major influential factor for the
    memory updates?  Besides the number of devices, does the number of
    queues also matter?  Is there anything else?

  - Total downtime comparison (only if above is only part of the downtime)

  - The nic used in the test.

Thanks,

-- 
Peter Xu



      parent reply	other threads:[~2022-12-16 17:13 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-13 13:35 [RFC v3 0/3] migration: reduce time of loading non-iterable vmstate Chuang Xu
2022-12-13 13:35 ` [RFC v3 1/3] memory: add depth assert in address_space_to_flatview Chuang Xu
2022-12-14 16:03   ` Chuang Xu
2022-12-14 21:38     ` Peter Xu
2022-12-15 16:04       ` Peter Xu
2022-12-20 14:27         ` Chuang Xu
2022-12-15 16:51   ` Peter Maydell
2022-12-20 14:28     ` Chuang Xu
2022-12-20 15:02       ` Peter Xu
2022-12-13 13:35 ` [RFC v3 2/3] virtio: support delay of checks in virtio_load() Chuang Xu
2022-12-13 16:31   ` Peter Xu
2022-12-14 16:02     ` Chuang Xu
2022-12-13 13:35 ` [RFC v3 3/3] migration: reduce time of loading non-iterable vmstate Chuang Xu
2022-12-16 17:11 ` Peter Xu [this message]

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