On Fri, Nov 16, 2001 at 03:25:43PM +0100, Fabrice Peix wrote: > Just two questions : > > 1 : The time to do a Context Switches is or not constent ? Depends on the architecture. The Intel x86 family has a physical mapped cache, so context switches don't affect the cache. The ARM family has a virtual mapped cache, so each time a context switch occurs the cache has to be flushed and invalidated. How much time that takes depends on the amount of dirty cache lines. Erik -- J.A.K. (Erik) Mouw, Information and Communication Theory Group, Faculty of Information Technology and Systems, Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands Phone: +31-15-2783635 Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl WWW: http://www-ict.its.tudelft.nl/~erik/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ IRC Channel: irc.openprojects.net / #kernelnewbies Web Page: http://www.kernelnewbies.org/
