On Mon, Dec 19, 2011 at 08:09:32PM +0000, David Chisnall wrote: > On 19 Dec 2011, at 19:52, Warner Losh wrote: > > > -1. The needs of the many? Please. Let's break a useful feature because > > some people don't understand it and are impatient? That's lame. > > How useful is gprof-based profiling these days? Now that we > have the DTrace pid provider, don't we have access to much more > fine-grained profiling information without the need for shipping > two versions of every library?
It is quite uesful given that for the last 20 or so years, I can do cc -o z -pg a.c -lm_p ./z gprof -b -l ./z z.gmon | more % cumulative self self total time seconds seconds calls ms/call ms/call name 72.1 0.91 0.91 0 100.00% _mcount [1] 11.1 1.05 0.14 8388608 0.00 0.00 sinf [4] 8.2 1.16 0.10 8388608 0.00 0.00 nextafterf [5] 4.6 1.21 0.06 0 100.00% .mcount (9) to ge the information I want. dtrace(1M) does not seem to contain an example that gives the equivalent information. In fact, the manpage contains no examples, only the statement: See the Solaris Dynamic Tracing Guide for detailed examples of how to use the dtrace utility to perform these tasks. which, of course, is not very useful given that I do not have a Solaris Dynamic Tracing Guide. -- Steve _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
