Re: [Lse-tech] Re: A common layer for Accounting packages
From: Tim Schmielau
Date: Wed Feb 23 2005 - 04:55:03 EST
On Tue, 22 Feb 2005, Andrew Morton wrote:
> We really want to avoid doing such stuff in-kernel if at all possible, of
> course.
>
> Is it not possible to implement the fork/exec/exit notifications to
> userspace so that a daemon can track the process relationships and perform
> aggregation based upon individual tasks' accounting? That's what one of
> the accounting systems is proposing doing, I believe.
>
> (In fact, why do we even need the notifications? /bin/ps can work this
> stuff out).
I had started a proof of concept implementation that could reconstruct the
whole process tree from userspace just from the BSD accounting currently
in the kernel (+ the conceptual bug-fix that I misnamed "[RFC] "biological
parent" pid"). This could do the whole job ID thing from userspace.
Unfortunately, I haven't had time to work on it recently.
Also, doing per-job accounting might actually be more lightweight than
per-process accounting, so I'm not at all opposed to unifying CSA and BSD
accounting into one mechanism that just writes different file formats.
A complete framework seems like overkill to me, too.
Tim
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