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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20100111102023.GE13886@linux-mips.org \
--to=ralf@linux-mips.org \
--cc=ddaney@caviumnetworks.com \
--cc=linux-mips@linux-mips.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.