From: Thomas Huth <thuth@redhat.com>
To: "Daniel P. Berrangé" <berrange@redhat.com>,
"Juan Quintela" <quintela@redhat.com>
Cc: qemu-devel@nongnu.org, peter.maydell@linaro.org,
Richard Henderson <rth@twiddle.net>, Peter Xu <peterx@redhat.com>
Subject: Re: Big TCG slowdown when using zstd with aarch64
Date: Fri, 2 Jun 2023 11:24:00 +0200 [thread overview]
Message-ID: <ae4540a2-f4d1-aece-d1e5-d631d9814233@redhat.com> (raw)
In-Reply-To: <ZHmyA40nIiUBceX0@redhat.com>
On 02/06/2023 11.10, Daniel P. Berrangé wrote:
...
> IMHO this feels like just another example of compression being largely
> useless. The CPU overhead of compression can't keep up with the guest
> dirty workload, making the supposedly network bandwidth saving irrelevant.
Has anybody ever shown that there is a benefit in some use cases with
compression? ... if not, we should maybe deprecate this feature and remove
it in a couple of releases if nobody complains. That would mean less code to
maintain, less testing effort, and likely no disadvantages for the users.
Thomas
next prev parent reply other threads:[~2023-06-02 9:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-01 21:06 Big TCG slowdown when using zstd with aarch64 Juan Quintela
2023-06-02 9:10 ` Daniel P. Berrangé
2023-06-02 9:22 ` Peter Maydell
2023-06-02 9:37 ` Daniel P. Berrangé
2023-06-02 9:42 ` Alex Bennée
2023-06-02 9:24 ` Thomas Huth [this message]
2023-06-02 9:34 ` Juan Quintela
2023-06-02 9:47 ` Thomas Huth
2023-06-02 9:25 ` Juan Quintela
2023-06-02 10:14 ` Daniel P. Berrangé
2023-06-02 10:41 ` Juan Quintela
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