From: Alberto Garcia <berto@igalia.com>
To: Peter Lieven <pl@kamp.de>,
"qemu-devel\@nongnu.org" <qemu-devel@nongnu.org>,
qemu block <qemu-block@nongnu.org>
Subject: Re: block/throttle and burst bucket
Date: Fri, 26 Feb 2021 10:27:48 +0100 [thread overview]
Message-ID: <w51blc7ji0b.fsf@maestria.local.igalia.com> (raw)
In-Reply-To: <efe8ee1c-e12f-b739-b9dd-9bd6d80527cb@kamp.de>
On Thu 25 Feb 2021 06:34:48 PM CET, Peter Lieven <pl@kamp.de> wrote:
> I was wondering if there is a way to check from outside (qmp etc.) if
> a throttled block device has exceeded the iops_max_length seconds of
> time bursting up to iops_max and is now hard limited to the iops limit
> that is supplied?
>
> Would it be also a good idea to exetend the accounting to account for
> requests that must have waited before being sent out to the backend
> device?
No, there's no such interface as far as I'm aware. I think one problem
is that throttling is now done using a filter, that can be inserted
anywhere in the node graph, and accounting is done at the BlockBackend
level.
We don't even have a query-block-throttle function. I actually started
to write one six years ago but it was never finished.
Berto
next prev parent reply other threads:[~2021-02-26 9:29 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-25 17:34 block/throttle and burst bucket Peter Lieven
2021-02-26 9:27 ` Alberto Garcia [this message]
2021-02-26 12:33 ` Peter Lieven
2021-03-01 10:59 ` Kevin Wolf
2021-03-01 12:11 ` Peter Lieven
2021-03-08 12:20 ` Alberto Garcia
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