From: Ralf Baechle <ralf@linux-mips.org>
To: David Daney <ddaney@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Subject: Re: [PATCH] MIPS: Octeon: Use non-overflowing arithmetic in sched_clock
Date: Mon, 11 Jan 2010 11:20:23 +0100 [thread overview]
Message-ID: <20100111102023.GE13886@linux-mips.org> (raw)
In-Reply-To: <1262990856-8300-1-git-send-email-ddaney@caviumnetworks.com>
On Fri, Jan 08, 2010 at 02:47:36PM -0800, David Daney wrote:
> With typical mult and shift values, the calculation for Octeon's
> sched_clock overflows when using 64-bit arithmetic. Use 128-bit
> calculations instead.
Applied though my first thought whenever I see extended precission math
is gross - maybe we're going to find a better solution. Hopefully!
Ralf
next prev parent reply other threads:[~2010-01-11 10:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-08 22:47 [PATCH] MIPS: Octeon: Use non-overflowing arithmetic in sched_clock David Daney
2010-01-11 10:20 ` Ralf Baechle [this message]
2010-01-11 17:28 ` David Daney
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