On Thu, 12 Jul 2007, Danek Duvall wrote:
> On Fri, Jul 13, 2007 at 06:50:52AM +0200, Roland Mainz wrote: > >> With "-xO3" it takes ~31 seconds to execute this script. >> With "-xc99=%all -xO4 -xalias_level=basic -xdepend" it takes ~39 seconds >> to execute this script. >> >> Erm... the results are somehow upside-down from what I would expect from >> these options... ;-( > > A typical response to that is that the function inlining that -xO4 turns on > makes small programs bigger, and less likely to fit in cache or in a set of > cache lines, resulting in memory thrashing and lower performance. I expect > that cputrack(1m) would help you figure out if that's happening. This is in the userland, right? Sun Studio Performance Analyzer is your choice. Alexander > _______________________________________________ tools-discuss mailing list [email protected]
