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Date:      Wed, 18 Nov 2009 13:12:33 -0600
From:      Dan Nelson <dnelson@allantgroup.com>
To:        cronfy <cronfy@sprinthost.ru>
Cc:        FreeBSD <freebsd-questions@freebsd.org>
Subject:   Re: get accounting info for running process
Message-ID:  <20091118191233.GC89004@dan.emsphone.com>
In-Reply-To: <4B042C50.6060904@sprinthost.ru>
References:  <4B042C50.6060904@sprinthost.ru>

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In the last episode (Nov 18), cronfy said:
> Is it possible to find out how much a process have used CPU user
> time/system time/IO operations for now by it's pid?  Like in sa, but for
> running process.

It's available to userland programs via the kern.proc.all syscall.  it
returns an array of "struct kinfo_proc", one for each process.  One of the
elements is ki_rusage, which contains the data that the sa command uses.

The ps command can easily be extended to print these fields.  See this patch
at http://lists.freebsd.org/pipermail/freebsd-hackers/2009-March/027918.html
for an example.  (I still need to file that PR...)

-- 
	Dan Nelson
	dnelson@allantgroup.com



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