From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <40486783.7010703@imc-berlin.de> Date: Fri, 05 Mar 2004 12:41:55 +0100 From: Steven Scholz MIME-Version: 1.0 To: linuxppc-embedded@lists.linuxppc.org Subject: Re: uncached user space mapping with mmap() ??? References: <40473464.8010203@imc-berlin.de> <404837D3.3060609@imc-berlin.de> <40486600.9090304@jonmasters.org> In-Reply-To: <40486600.9090304@jonmasters.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Jon Masters wrote: > | Is it always better to map only the small part I am going to use? > > Of course it is always best to map only the small range that you are > going to use and there will not necessarily be only one TLB mapping (I > am here referring to your comments on ARM Linux Kernel List) etc. etc. > However here especially I am inclined to repeat what they said on the > other list - these figures are so close that they might differ for other > reasons and so on. Did you repeat this in a controlled way many times? Yes. The thruput is calculated after repeating the loop 1000 times (Retries = 1000). > You will need to answer the questions Russell King posted in order for > us to work through this and figure out where the difference lies. I am just about to do it. -- Steven Scholz imc Measurement & Control imc Meßsysteme GmbH Voltastr. 5 Voltastr. 5 13355 Berlin 13355 Berlin Germany Deutschland ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/