In the last episode (Feb 03), Alfred Perlstein said: > * Michal Mertl <[EMAIL PROTECTED]> [020203 08:17] wrote: > > Several runs of the program take about the same time but the time > > changes wildly when the executable is called differently. > > > > The only thing which I can think of that can be causing this is > > some memory alignment issue. > > It sure looks like an alignment issue. If you print the address of > 'i' and 'j' in the attached program you can see for the fast case > they are aligned to 8 byte boundries, but when it's slow they are at > an address that is a multiple of 4 but not 8. > > Not really sure what to make of this, anyone else know how we ought > to fix this?
This has actually been an issue for ages, most commonly seen with doubles. take a look at the thread at http://www.freebsd.org/cgi/getmsg.cgi?fetch=393691+0+/usr/local/www/db/text/2000/freebsd-current/20000507.freebsd-current or, easier to read the entire thread: http://groups.yahoo.com/group/freebsd-current/messages/39583?threaded=1 -- Dan Nelson [EMAIL PROTECTED] To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
