From: Zwane Mwaikambo <zwane@arm.linux.org.uk>
To: Carsten Otto <c-otto@gmx.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: e1000 statistics timer
Date: Sat, 2 Aug 2003 16:57:00 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.53.0308021651120.3473@montezuma.mastecende.com> (raw)
In-Reply-To: <3F2C14BF.9060505@gmx.de>
On Sat, 2 Aug 2003, Carsten Otto wrote:
> "mod_timer(&adapter->watchdog_timer, jiffies + 2* HZ);"
> "mod_timer(&adapter->watchdog_timer, HZ);"
After HZ jiffies have passed you're adding a timer to trigger in the past.
> Now my questions:
> 1) Is my implementation right? It works...
That is often the case with lots of software, it may be wrong but by
$DEITY's gracious hand, still 'works'
> 2) Can I change that delay to 1 sec withhout "hurting someone"?
Dunno, try jiffies + HZ, they're just statistics
> 3) What are these jiffies? Mathematically they are about 20 :>
jiffies is the global variable which stores how many timer ticks have
occured since system startup.
> 4) There are other timers in the code, that use "jiffies + 2 * HZ" too.
> Should they be changed, too?
Nooo!! =)
> IMPORTANT:
> Please answer to c-otto@gmx.de, because I don't get the whole LKML.
Have fun,
Zwane
--
function.linuxpower.ca
next prev parent reply other threads:[~2003-08-02 21:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-02 19:45 e1000 statistics timer Carsten Otto
2003-08-02 20:57 ` Zwane Mwaikambo [this message]
2003-08-02 23:14 ` Marc-Christian Petersen
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