linux-kernel - Re: Why do we still have 32 bit counters? Interrupt counters overflow within 50 days

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Message-ID: <alpine.DEB.2.11.1410061445170.31391@gentwo.org>
Date:	Mon, 6 Oct 2014 14:45:56 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	David Lang <david@...g.hm>
cc:	Thomas Gleixner <tglx@...utronix.de>,
	Richard Cochran <richardcochran@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: Why do we still have 32 bit counters? Interrupt counters overflow
 within 50 days

On Mon, 6 Oct 2014, David Lang wrote:

> No, tools recognize that things happen (wraps, reboots, etc) and have some
> threshold that they say "if this value changes more than the threshold,
> something happened and it's not valid to use this delta"
>
> This has been the case for decades. If you have a monitoring tool that does
> not account for this sort of thing, you have an immature tool.

Well maybe put those statement somewhere to find for those writing
diagnostics tools that use the counters.

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