Date: Sun, 27 Dec 2009 03:32:26 -0500 From: "b. f." <bf1783@googlemail.com> To: Manish Jain <invalid.pointer@gmail.com> Cc: freebsd-questions@FreeBSD.org Subject: Re: Looking for a convenient way in C to retrieve CPU and memory usage of a process Message-ID: <d873d5be0912270032g2987d6cr2bd1513279414f8f@mail.gmail.com>
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>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.
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