Hi Enrico... On Sat, Feb 26, 2011 at 03:42, Enrico Granata <egranata@xxxxxxxx> wrote: > > > I modified the source code to show exactly how many clock ticks it is taking > for each call. It seems that the behavior hinted by Mauro Romano Trajber is > actually there: > [enrico@espresso ~]$ ./syscallperf 15 > 4925 > 1190 > 942 watching strace, objdump etc etc, I roughly conclude the high initial tsc number might be due to initial symbol resolve to mygetpid() and/or syscall() (IIRC this is called PLT/GOT symbol resolve). After the GOT/PLT table had the syscall/mygetpid address, the rest went fast. PS: if using gcc -O2, seems like mygetpid() is really inlined.... -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
