From: Paolo Bonzini <pbonzini@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: lcapitulino@redhat.com, qemu-devel@nongnu.org, marcel.a@redhat.com
Subject: Re: [Qemu-devel] [PATCH 2/2] exec: make address spaces 64-bit wide
Date: Mon, 11 Nov 2013 11:15:59 +0100 [thread overview]
Message-ID: <5280AE5F.9050305@redhat.com> (raw)
In-Reply-To: <20131110103111.GC3241@redhat.com>
Il 10/11/2013 11:31, Michael S. Tsirkin ha scritto:
> > Reported-by: Luiz Capitulino <lcapitulino@redhat.com>
> > Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
>
> So this causes a 12% performance regression on some TCG
> tests, I think we should look into a smarter
> datastructure to solve the issues.
It causes a 12% performance regression in a single testcase where KVM
has a 150x performance regression. This says a lot about the relevance
of the testcase.
In any case, I have patches to avoid the regression. For 1.7 we can
just revert the patches, for 1.8 we can apply this patch together with
the optimizations that avoid introducing a regression.
Paolo
next prev parent reply other threads:[~2013-11-11 10:16 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-07 16:14 [Qemu-devel] [PATCH 0/2] exec: alternative fix for master abort woes Paolo Bonzini
2013-11-07 16:14 ` [Qemu-devel] [PATCH 1/2] split definitions for exec.c and translate-all.c radix trees Paolo Bonzini
2013-11-07 16:14 ` [Qemu-devel] [PATCH 2/2] exec: make address spaces 64-bit wide Paolo Bonzini
2013-11-10 10:31 ` Michael S. Tsirkin
2013-11-11 10:15 ` Paolo Bonzini [this message]
2013-11-07 16:21 ` [Qemu-devel] [PATCH 0/2] exec: alternative fix for master abort woes Michael S. Tsirkin
2013-11-07 16:29 ` Paolo Bonzini
2013-11-07 16:47 ` Michael S. Tsirkin
2013-11-07 17:29 ` Paolo Bonzini
2013-11-07 18:54 ` Michael S. Tsirkin
2013-11-07 19:12 ` Paolo Bonzini
2013-11-11 16:43 ` Michael S. Tsirkin
2013-11-11 16:57 ` Paolo Bonzini
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