Cap CPU Utilization

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Spawn666948 - 30 Nov 2007 21:38 GMT

Is there a way to cap the CPU utilization for a particular process?

Example: for certain processes, I don't want them going above 10%.

The reason I'm trying to do this is because even when I set the
processes to Low Priority, they still seem to hog the cpu. Opening
apps as simple is Notepad takes forever.

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Michael C - 01 Dec 2007 11:42 GMT

> Is there a way to cap the CPU utilization for a particular process?
>
[quoted text clipped - 3 lines]
> processes to Low Priority, they still seem to hog the cpu. Opening
> apps as simple is Notepad takes forever.

One way I can think of doing this is to time x number of loops. If those
loops take 0.1 seconds then do a sleep for 0.9 seconds. That will give 10%
cpu usage approx.

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Spawn666948 - 01 Dec 2007 19:20 GMT

> One way I can think of doing this is to time x number of loops. If those
> loops take 0.1 seconds then do a sleep for 0.9 seconds. That will give 10%
> cpu usage approx.

Can you explain what you mean by "time x number of loops"? Thanks.

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Michael C - 01 Dec 2007 22:59 GMT

>> One way I can think of doing this is to time x number of loops. If those
>> loops take 0.1 seconds then do a sleep for 0.9 seconds. That will give
>> 10%
>> cpu usage approx.
>
> Can you explain what you mean by "time x number of loops"? Thanks.

You have a process that does something repetitive I presume? (it's very
difficult to write any code that takes a long time if something doesn't
repeat :-). Anyway, code would be something like this. GetTickCount and
sleep are API calls.

dim i as long
dim t1 as long, t2 as long
t1 = GetTickCount
for x = 1 to 100000000000000000
i = i + 1
if i = 1000 then
t2 = gettickcount
t1 = t2 - t1
sleep t1 * 9
i = 0
t1 = t2
end if
next

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VB Forum / Win API / December 2007

Cap CPU Utilization