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Re: Timing an operation


From: Matthew_S
Subject: Re: Timing an operation
Date: Fri, 25 May 2007 03:20:41 -0700 (PDT)

Sorry guys, I need to take it a step further and am hitting a wall at the
moment;

I need to take two results (from you examples), compare them and get a final
result.  What I have thus far is;

operation()
{
echo >> $LOG
        echo Running operation>> $LOG
        for i in a b 
        do
                mkdir $DIR/dir$i
                cd $DIR/dir$i
                date1=$SECONDS
                operation
                date2=$SECONDS
                interval$i=$(($date2 - $date1)) #1st & 2nd errors
                echo Operation took $interval second. >> $LOG
                rm -rf *
                cd /
                umount $DIR
        done
        echo The 2nd time difference should be quicker than the 1st >> $LOG
        interval=$(($interval8 - $interval2048)) >> $LOG #3rd error
        if test 5 -gt "$interval"; then
                echo fail
                else
                echo pass
        fi
}

I'm getting the errors;
./file.sh: line x: intervala=1: command not found
./file.sh: line x: intervalb=1: command not found
./file.sh: line x: - : syntax error: operand expected (error token is " ")

It seems so simple in my head, but I don't know how to execute it...

Any help would be greatly appreciated.

Thanks

Matthew.



Matthew_S wrote:
> 
> Thanks Paul and Chet;
> 
> They both do the same thing and that's exactly what I was looking for.
> 
> Thanks again,
> 
> Matthew.
> 
> 
> Chet Ramey wrote:
>> 
>> Paul Jarc wrote:
>> 
>>> date1=`perl -e 'print time()'`
>>> ...
>>> date2=`perl -e 'print time()'`
>>> interval=`expr "$date2" - "$date1"`
>> 
>> This general approach can be used without invoking any external programs:
>> 
>> date1=$SECONDS
>> ...
>> date2=$SECONDS
>> interval=$(( $date2 - $date1 ))
>> 
>> Chet
>> -- 
>> ``The lyf so short, the craft so long to lerne.'' - Chaucer
>>                     Live Strong.  No day but today.
>> Chet Ramey, ITS, CWRU    address@hidden   
>> http://cnswww.cns.cwru.edu/~chet/
>> 
>> 
>> _______________________________________________
>> Bug-bash mailing list
>> address@hidden
>> http://lists.gnu.org/mailman/listinfo/bug-bash
>> 
>> 
> 
> 

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