From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <49D1EA0B.2020300@domain.hid> Date: Tue, 31 Mar 2009 12:01:47 +0200 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <17B3FD74-07D0-4F36-9836-8E03943DF917@domain.hid> In-Reply-To: <17B3FD74-07D0-4F36-9836-8E03943DF917@domain.hid> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai-core] geode gx1 latencies List-Id: "Xenomai life and development \(bug reports, patches, discussions\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Steven Seeger Cc: xenomai@xenomai.org Steven Seeger wrote: > Per Gilles's suggestion, Mark at Stellartech ran latency and klatency > with the TSC enabled "the hack" and without the TSC enabled. He also > posted the CPU task measurements with our app running without the > hack, which is horrible compared to when the TSC is on. > > It looks like we are better off with the TSC. The worst case is much > better, anyway. I do not understand these results. In the "nohack" case, is CONFIG_X86_TSC enabled ? In this case, you should not observe any difference. -- Gilles.