If the code that I marking either Wall or CPU takes longer than 1
second there is big trouble
Sent from my iPhone
On Feb 3, 2011, at 1:21 PM, Sam Siegel <[email protected]> wrote:
On Thu, Feb 3, 2011 at 10:11 AM, Micheal Butz <[email protected]
>wrote:
I am doing this in Rexx exec processing a SVC dump after calling
BLSUXTOD. To convert the double word to a 26 character string I use
the
last 6 digits I understand I can bypass this conversion and just do
the
subtraction as you said on the double word regardless wouldn't the
results
be the same. ???
By using the right most digits there can be a situation where the
end-time
appears to occur prior to the start-time. Consider the following:
Start time: 1 999 998
End time: 2 000 003
When all digits are considered, end-time is greater than start-
time. When
only 6 digits are considered, start-time appears to be greater than
end-time.
To get an accurate time enough digits need to be used to ensure that
end-time is greater than start-time when doing the subtractions.
Using all digits as Ed has suggested pretty much guarantees end-time
will be
great than start-time.
Sent from my iPhone
On Feb 3, 2011, at 11:57 AM, Edward Jaffe <[email protected]
>
wrote:
On 2/3/2011 8:41 AM, Micheal Butz wrote:
I do a substr to get the last 6 digits of the date/time. The
microseconds
portion. And substract. Value = after - before
To subtract TOD values, use unsigned binary doubleword arithmetic.
If you
want resolution to microseconds, shift both doubleword values
right by 12
bits before subtracting.
--
Edward E Jaffe
Phoenix Software International, Inc
831 Parkview Drive North
El Segundo, CA 90245
310-338-0400 x318
[email protected]
http://www.phoenixsoftware.com/
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