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From: Roman Kurakin <rik@inse.ru>
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To: Julian Elischer <julian@elischer.org>
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Cc: freebsd-hackers@freebsd.org, m.ehinger@ltur.de
Subject: Re: nanosecond delay in kernel module
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Hi,

Julian Elischer:

> m.ehinger@ltur.de wrote:
>
>> Hi,
>>
>> what is the official way to delay in a kernel module for about 10 
>> nanoseconds (1/1,000,000,000th second).
>>
>> I found DELAY(9), but it uses microseconds (1/1,000,000th second).
>>  
>>
>
> at this time there is none. maybe you can write one?
> You probably need to find some machine instructions with a known delay

Probably PCI read/write ...

rik

>
>> Any help would be appeciated
>>
>> Maik
>>
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