From: Benoit Monin <benoit.monin@laposte.net>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] ppc: Increase precision of ticks2usec
Date: Tue, 10 Mar 2009 15:20:51 +0100 (CET) [thread overview]
Message-ID: <27653688.82966.1236694851843.JavaMail.www@wwinf8219> (raw)
> De : "Wolfgang Denk"
>
> Dear Benoit Monin,
>
> In message <9454366.19868.1236182927234.JavaMail.www@wwinf8202> you wrote:
> >
> > The tick of some PowerPC cpu is running at high frequency and
> > it can be used to get microsecond precision from it. Make use
> > of div64 to achieve this precision in ticks2usec.
>
> Which problem are you trying to fix?
>
> Where exactly do we need very high accuracy?
>
> What is the overhead of using do_div() versus the old, simple code?
>
Well, that was more some icing on the cake for CONFIG_PRINT_TIME,
so you can discard this patch.
> Best regards,
>
> Wolfgang Denk
>
Sincerely,
Beno?t.
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next reply other threads:[~2009-03-10 14:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-10 14:20 Benoit Monin [this message]
-- strict thread matches above, loose matches on Subject: below --
2009-03-04 16:08 [U-Boot] [PATCH] ppc: Increase precision of ticks2usec Benoit Monin
2009-03-08 22:46 ` Wolfgang Denk
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