Re: Looking for a convenient way in C to retrieve CPU and memory usage of a process
Manish Jain wrote: I am looking for a convenient way using C to retrieve the current CPU and memory utilization of a process of which I have the pid. Can somebody please give me a hint of which system-calls/library-functions to use for this ? I don't want to use the system() function or grep for information via the /proc filesystem. I would be grateful if you could also please mention whether the suggested method[s] is/are FreeBSD-specific or would be portable to other environments like Solaris/Linux ? Use the source, Luke. In this cse, probably a very good place to start is with top(1) since it already does a lot of what you want. Start with /usr/src/contrib/top/ This sort of thing generally requires reading /dev/kmem, which is very OS dependent. The same sort of approach will probably work on most Unix-oid OSes, but the details will be significantly different. Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate Kent, CT11 9PW signature.asc Description: OpenPGP digital signature
Re: Looking for a convenient way in C to retrieve CPU and memory usage of a process
I am looking for a convenient way using C to retrieve the current CPU and memory utilization of a process of which I have the pid. Can somebody please give me a hint of which system-calls/library-functions to use for this ? I don't want to use the system() function or grep for information via the /proc filesystem. I would be grateful if you could also please mention whether the suggested method[s] is/are FreeBSD-specific or would be portable to other environments like Solaris/Linux ? Hmm. Portable, no /proc... ? It could be tough to do this generically. Why not look at unixtop, which tries to be portable?: http://sourceforge.net/projects/unixtop/files/ I think on FreeBSD it resorts to using kvm(3). You could just call that directly. Also, coming soon on FreeBSD, there will be libprocstat, which aims at making this easier: http://svn.freebsd.org/viewvc/base/projects/libprocstat/ stas@ is working on that. This kind of question is best suited for freebsd-hackers@ . Regards, b. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Looking for a convenient way in C to retrieve CPU and memory usage of a process
Hello, I am looking for a convenient way using C to retrieve the current CPU and memory utilization of a process of which I have the pid. Can somebody please give me a hint of which system-calls/library-functions to use for this ? I don't want to use the system() function or grep for information via the /proc filesystem. I would be grateful if you could also please mention whether the suggested method[s] is/are FreeBSD-specific or would be portable to other environments like Solaris/Linux ? Thanks for any help. Regards Happy New Year Manish Jain invalid.poin...@gmail.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
