netdev - Re: [PATCH v5 net-next] tcp: switch rtt estimations to usec resolution

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Message-Id: <20140224.191508.199622728478930062.davem@davemloft.net>
Date:	Mon, 24 Feb 2014 19:15:08 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	stephen@...workplumber.org
Cc:	eric.dumazet@...il.com, ja@....bg, ycheng@...gle.com,
	netdev@...r.kernel.org, ncardwell@...gle.com, brakmo@...gle.com
Subject: Re: [PATCH v5 net-next] tcp: switch rtt estimations to usec
 resolution

From: Stephen Hemminger <stephen@...workplumber.org>
Date: Mon, 24 Feb 2014 15:51:30 -0800

> The original reason I kept ms resolution and added the flag was
> that accessing high resolution time is expensive for systems where
> TSC is not stable.  Google may live in a world of SMP systems with
> good X86 CPUs with working TSC, but other architectures and system
> config's may have non-working TSC.

+1
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