Re: linux-2.6.0-test6 error during linking

[Paolo Dovera <pdovera@bmind.it>]

Thanks^2   to you!
It works fine
I'm trying 2.6.0-test6 on Tsunami Alpha platform

Ciao,
Paolo

Falk Hueffner wrote:

>Balint Cristian <rezso@rdsor.ro> writes:
>  
>
>>On Sunday 28 September 2003 23:51, Falk Hueffner wrote:
>>    
>>
>>>sched_clock is not implemented yet for Alpha. It is supposed to
>>>return a high resolution timer. As workaround, you could just copy
>>>the implementation from ARM, which simply returns the value based
>>>on jiffies.  Ideally, one would take into account the cycle
>>>counter, but it wraps every few seconds, which has to be taken
>>>care of.
>>>      
>>>
>>Can post here a patch based on arm ?
>>    
>>
>
>Well, just copy the function:
>
>--- arch/alpha/kernel/time.c~   2003-09-28 02:50:20.000000000 +0200
>+++ arch/alpha/kernel/time.c    2003-09-28 13:39:58.000000000 +0200
>@@ -570,3 +570,12 @@
> 
>        return retval;
> }
>+
>+/*
>+ * Scheduler clock - returns current time in nanosec units.
>+ * Should probably take rpcc into account for improved resolution
>+ */
>+unsigned long long sched_clock(void)
>+{
>+       return (unsigned long long) jiffies * (1000000000 / HZ);
>+}
>
>I've not tested this, it should work, but probably scheduling
>behaviour will not be as good as it could be, although HZ being 1000
>(or larger) on Alpha should help.
>
>  
>
>>Eventualy post it on linux kernel list or to Richard Henderson ?
>>    
>>
>
>Not without testing it, and I have no time for that currently.
>
>  
>