From: Arjan van de Ven <arjan@infradead.org>
To: David Engraf <engraf.david@netcom-sicherheitstechnik.de>
Cc: linux-kernel@vger.kernel.org, "'Andrew Morton'" <akpm@osdl.org>
Subject: Re: [PATCH] Win32 equivalent to GetTickCount systemcall (i386)
Date: Tue, 06 Dec 2005 11:44:39 +0100 [thread overview]
Message-ID: <1133865880.2858.42.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <009201c5fa50$f3f58a10$0a016696@EW10>
On Tue, 2005-12-06 at 11:36 +0100, David Engraf wrote:
> This patch adds a new systemcall on i386 architectures returning the jiffies
> value to the application.
> As a kernel developer you can use jiffies but from the user space there is
> no equivalent function which counts every millisecond like the Win32
> GetTickCount.
a few comments
1) jiffies are 64 bit not 32
2) jiffies are not a constant time, eg HZ is a config option,
exposing that internal counter to userspace sounds wrong, after
all what would it be used for
3) wouldn't it be better to expose a wallclock time thing which
has a constant unit of time between all kernels?
(and.. wait.. isn't that called gettimeofday() )
next prev parent reply other threads:[~2005-12-06 10:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-06 10:36 David Engraf
2005-12-06 10:44 ` Arjan van de Ven [this message]
2005-12-06 11:23 ` David Engraf
2005-12-06 11:29 ` Ingo Molnar
2005-12-06 12:06 ` David Engraf
2005-12-06 11:35 ` Arjan van de Ven
2005-12-06 11:37 ` Jakub Jelinek
2005-12-06 12:13 ` Bernd Petrovitsch
2005-12-06 12:26 ` David Engraf
2005-12-06 19:48 ` Andi Kleen
2005-12-06 18:00 ` Eric Dumazet
2005-12-06 18:01 ` Andi Kleen
2005-12-06 19:47 ` Andi Kleen
2005-12-06 15:25 ` AW: " David Engraf
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