important how to stop interrupts and start them again after finishing what you wanted to do??

important how to stop interrupts and start them again after finishing what you wanted to do??

[will fitzgerald]

Hi all,

does any know how i can stop and start interrupts.

i have added a probe function to the kernel to measure
network mechanisms times in cycles, called 
probe_point().

probe_point(int probeid){

get rdtsc time and put id and time into buffer
when full use printk to write buffer to disk.

}

then in mechanisms of interest i place a call to the
probe_point()for example,

vortex_interrupt(){

probe_point(10);// entry of function
.
.function stuff
.
.probe_point(11);// exit of function
}

the problem is some times my buffer does not record
some id's or times. i think this is because another
interrupt took place and so the probe_point() exits
before it gets a chance to store the id and time.

how do i go about setting an non interrupt in the
probe_point function to make sure it finishes what its
supposed to do?

for example:

probe_point(int probeid){

do not interrupt me until i do:

get rdtsc time and put id and time into buffer
when full use printk to write buffer to disk.

now i have finshed puting an id and time into a buffer
so you can interrpt now.

}


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Re: important how to stop interrupts and start them again after finishing what you wanted to do??

[Richard B. Johnson]

On Tue, 5 Nov 2002, [iso-8859-1] will fitzgerald wrote:

> Hi all,
> 
> does any know how i can stop and start interrupts.
> 
[SNIPPED...]

`grep` kernel driver code for spinlock.


Cheers,
Dick Johnson
Penguin : Linux version 2.4.18 on an i686 machine (797.90 BogoMips).
   Bush : The Fourth Reich of America