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From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
To: Franck Bui-Huu <vagabon.xyz@gmail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>, linux-mips@linux-mips.org
Subject: Re: Tickless/dyntick kernel, highres timer and general time crapectomy
Date: Thu, 07 Jun 2007 18:49:59 +0400	[thread overview]
Message-ID: <46681B17.2080207@ru.mvista.com> (raw)
In-Reply-To: <cda58cb80706070744v21e1bbf3sa28990b4477a8844@mail.gmail.com>

Hello.

Franck Bui-Huu wrote:

> [ weird, Gmail thought you were a spamer... ]

    Well, I guess I should thank my ISP which indeed hosts many spammers. :-)

> Sergei Shtylyov wrote:

>>    No, it doesn't. Even on dyntick kernels, interrupts do happen several
>> times a second. Dynticks have nothing to do with disabling timer
>> interrupts...
>>
> 
> That's true however if your system has 2 clock devices. One is the r4k-hpt
> and the other one soemthing else with a higher rating. If you don't stop
> r4k-hpt interrupts, how does it work ?

    The unwanted events just gets ignored by higher-level code, IIRC... 
Classic PowerPC CPUs have the same problem (even worse, actually) -- one can't 
disable the decrementer interrupt at all.

WBR, Sergei

  reply	other threads:[~2007-06-07 14:48 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-06 18:54 Tickless/dyntick kernel, highres timer and general time crapectomy Ralf Baechle
2007-06-06 19:04 ` Sergei Shtylyov
2007-06-06 19:04   ` Ralf Baechle
2007-06-06 19:04     ` Ralf Baechle
2007-06-07  7:59 ` Franck Bui-Huu
2007-06-07  8:49   ` Atsushi Nemoto
2007-06-07 11:30   ` Ralf Baechle
2007-06-07 13:11     ` Franck Bui-Huu
2007-06-07 13:43       ` Sergei Shtylyov
2007-06-07 14:44         ` Franck Bui-Huu
2007-06-07 14:49           ` Sergei Shtylyov [this message]
2007-06-07 15:48           ` Ralf Baechle
2007-06-08  8:29             ` Franck Bui-Huu
2007-06-08  9:41               ` Ralf Baechle
2007-06-08 14:22             ` Atsushi Nemoto
2007-06-07 15:02       ` Ralf Baechle
2007-06-07 15:14       ` Ralf Baechle
2007-06-08  9:07         ` Franck Bui-Huu
2007-06-08  9:57           ` Ralf Baechle

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