On Fri, 6 Jul 2001, Brian Pane wrote: > This morning, I instrumented the latest httpd-2.0 souce and found that > it's spending 41% of its CPU time in usr mode and 59% in sys when > delivering a 50KB, non-server-parsed file (on Linux, using sendfile). > For server-parsed requests, I've seen ratios as high as 70% usr, 30% sys. > > The bad news: the httpd is wasting a huge amount of CPU time in > user-space code (for an optimal httpd serving static files, the usr CPU > should approach zero; 41% is surprisingly high). The good news: there's > an opportunity to cut the httpd's CPU utilization nearly in half by > tuning just the user-space code.
The flip side of that, of course, is that we could probably also get rid of some useless/redundant system calls, thereby also reducing the time spent in sys CPU. --Cliff -------------------------------------------------------------- Cliff Woolley [EMAIL PROTECTED] Charlottesville, VA
