From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Rik van Riel <riel@redhat.com>
Cc: vatsa@linux.vnet.ibm.com, "Peter Zijlstra" <peterz@infradead.org>,
"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
"Nick Piggin" <npiggin@kernel.dk>,
"Mathieu Desnoyers" <mathieu.desnoyers@polymtl.ca>,
"Américo Wang" <xiyou.wangcong@gmail.com>,
"Eric Dumazet" <dada1@cosmosbay.com>,
"Jan Beulich" <JBeulich@novell.com>,
"Avi Kivity" <avi@redhat.com>,
Xen-devel <xen-devel@lists.xensource.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"Linux Virtualization"
<virtualization@lists.linux-foundation.org>,
"Jeremy Fitzhardinge" <jeremy.fitzhardinge@citrix.com>,
kvm@vger.kernel.org, suzuki@in.ibm.com
Subject: Re: [PATCH 2/3] kvm hypervisor : Add hypercalls to support pv-ticketlock
Date: Mon, 24 Jan 2011 09:49:58 -0800 [thread overview]
Message-ID: <4D3DBBC6.1000407@goop.org> (raw)
In-Reply-To: <4D3AEF7A.1050709@redhat.com>
On 01/22/2011 06:53 AM, Rik van Riel wrote:
> The main question that remains is whether the PV ticketlocks are
> a large enough improvement to also merge those. I expect they
> will be, and we'll see so in the benchmark numbers.
The pathological worst-case of ticket locks in a virtual environment
isn't very hard to hit, so I expect they'll make a huge difference
there. On lightly loaded systems (little or no CPU overcommit) then
they should be close to a no-op.
J
next prev parent reply other threads:[~2011-01-24 17:50 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <cover.1289940821.git.jeremy.fitzhardinge@citrix.com>
2011-01-19 16:44 ` [PATCH 00/14] PV ticket locks without expanding spinlock Srivatsa Vaddagiri
2011-01-19 17:07 ` [PATCH 1/3] debugfs: Add support to print u32 array Srivatsa Vaddagiri
2011-01-19 17:12 ` [PATCH 2/3] kvm hypervisor : Add hypercalls to support pv-ticketlock Srivatsa Vaddagiri
2011-01-19 17:21 ` Peter Zijlstra
2011-01-19 18:29 ` Srivatsa Vaddagiri
2011-01-19 18:53 ` Jeremy Fitzhardinge
2011-01-20 11:42 ` Srivatsa Vaddagiri
2011-01-20 17:49 ` Jeremy Fitzhardinge
2011-01-20 11:59 ` Srivatsa Vaddagiri
2011-01-20 13:41 ` Peter Zijlstra
2011-01-20 14:34 ` Srivatsa Vaddagiri
2011-01-20 17:56 ` Jeremy Fitzhardinge
2011-01-21 14:02 ` Srivatsa Vaddagiri
2011-01-21 14:48 ` Rik van Riel
2011-01-22 6:14 ` Srivatsa Vaddagiri
2011-01-22 14:53 ` Rik van Riel
2011-01-24 17:49 ` Jeremy Fitzhardinge [this message]
2011-01-19 17:23 ` Srivatsa Vaddagiri
2011-01-19 17:50 ` Peter Zijlstra
2011-01-19 17:17 ` [PATCH 3/3] kvm guest : Add support for pv-ticketlocks Srivatsa Vaddagiri
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