From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Subject: Re: [RFC][PATCH 12/13] Kemari: use signal to save qemu
	state for Kemari
Date: Tue, 17 Mar 2009 17:55:37 +0000
Message-ID: <49BFE419.5080103@eu.citrix.com>
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To: Yoshiaki Tamura <tamura.yoshiaki@lab.ntt.co.jp>
Cc: "ospk-vm@lab.ntt.co.jp" <ospk-vm@lab.ntt.co.jp>, Ian Pratt <Ian.Pratt@eu.citrix.com>, xen-devel <xen-devel@lists.xensource.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>, Keir Fraser <Keir.Fraser@eu.citrix.com>
List-Id: xen-devel@lists.xenproject.org

Yoshiaki Tamura wrote:

> Have you measured, or any thoughts on the latency of xenstore compared to signals?


I did a couple of quick tests and it seems that signals are faster then
xenstore but still xenstore offers good performances.

I measured the time using rdtsc at the sender size and at the receiver
size, the difference between the two values is the following:

signals: 368836

xenstore: 1984632