From: Matthew Dharm <mdharm@momenco.com>
To: karthikeyan natarajan <karthik_96cse@yahoo.com>
Cc: linux-mips@linux-mips.org
Subject: Re: Doubt in timer interrupt
Date: Wed, 21 Jan 2004 23:41:38 -0800 [thread overview]
Message-ID: <20040121234138.A24587@momenco.com> (raw)
In-Reply-To: <20040122072407.11156.qmail@web10102.mail.yahoo.com>; from karthik_96cse@yahoo.com on Thu, Jan 22, 2004 at 07:24:07AM +0000
As with any timer interrupt, if you mask it too long you'll lose time.
Generally, masking interrupts via the IE bit is a bad idea.
Matt
On Thu, Jan 22, 2004 at 07:24:07AM +0000, karthikeyan natarajan wrote:
> Hi All,
>
> In R4000 & descendent processors, interrupt number 7
> is being used for internal timer interrupt. From this
> i understand that the timer interrupt is also maskable
> when the IE bit in status register is cleared. If
> somebody mask this interrupt for a long time
> erroneously, then won't there be a problem in
> maintaining the system time?
> Please correct me if i am wrong..
>
> Does the system time is maintained via NMI?
>
> Thanks in advance,
> -karthi
>
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Matthew Dharm Work: mdharm@momenco.com
Senior Software Designer, Momentum Computer
next prev parent reply other threads:[~2004-01-22 7:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-22 7:24 Doubt in timer interrupt karthikeyan natarajan
2004-01-22 7:41 ` Matthew Dharm [this message]
2004-01-22 8:43 ` Dominic Sweetman
2004-01-22 9:27 ` karthikeyan natarajan
2004-01-23 8:18 ` Dominic Sweetman
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