From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Michael Chan" <mchan@broadcom.com>
Subject: Re: [Bugme-new] [Bug 10600] New: e1000 updates rx_bytes
 infrequently
Date: Mon, 05 May 2008 17:55:35 -0700
Message-ID: <1210035335.7941.180.camel@dell>
References: <bug-10600-10286@http.bugzilla.kernel.org/>
 <20080505155502.3fb16590.akpm@linux-foundation.org>
 <20080505.161806.267621711.davem@davemloft.net>
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To: "David Miller" <davem@davemloft.net>
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On Mon, 2008-05-05 at 16:18 -0700, David Miller wrote:
> Actually, the thing that matters is when ->get_stats() is called.
> 
> So if a driver can trigger a statistics DMA update at ->get_stats()
> time, that's probably what it should do.  But this could get
> expensive and make the "do DMA less often" optimization less useful.
> 
> 

The width of hardware counters may also be limited and so periodic
fetching or DMA may be needed to prevent overflow.