On 2/21/06, Gaurav Dhiman <gauravd.chd@xxxxxxxxx> wrote: > you can use -pg option of gcc along with gprof utility. > read more about this on > http://www.gnu.org/software/binutils/manual/gprof-2.9.1/gprof.html > > regards, > -Gaurav > > > On 2/21/06, Manav Kataria <manav@xxxxxxxxxxxxx> wrote: > > > > Greetings, > > Hi I wanted to profile time taken by a particular funtion in an > > application. I had been using gettimeofday() till now and calculating the > > time diff b/w the call of the function and its return. > > I read in a forum that even though it shows a resolution of microseconds > > it is incorrect. The true resolution is only the order of microseconds. Is > > the microsecond part really unreliable (fake) ?? > > How do I profile my code other wise ? > > Thanks in advance, > > MK > Try this out !!!! static unsigned int ms = 0; static struct timeval start_tm,cur_tm; do_gettimeofday(&start_tm); ms = (cur_tm.tv_sec*1000000+cur_tm.tv_usec)- (start_tm.tv_sec*1000000+start_tm.tv_usec) + 1; printk("%10ld.%3ld ms",ms/1000, ms%1000); Call the system call do_gettimeofday( &cur_tm ); ms = (cur_tm.tv_sec*1000000+cur_tm.tv_usec)- (start_tm.tv_sec*1000000+start_tm.tv_usec) + 1; printk("%10ld.%3ld ms",ms/1000, ms%1000); Its provided by Srinivas in an earlier thread. -- Cheers, Sandeep A man with one watch knows what time it is; a man with two watches is never quite sure. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
