| org.eclipse.test.performance usage [message #284175] |
Tue, 19 April 2005 10:21  |
Eclipse User |
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Hello,
I've been trying to use the eclipse performance framework to get a continual
pulse on some of the features in CDT.
I am subclassing PerformanceTestCase and I am seeing that I am getting
negative values from time to time wrt memory. I'm wondering if there is
something I have missed from the HowTo doc that I'm supposed to do to reset
the memory counters properly.
When I run one test stand-alone, the counters all work out positive, but if
I run a few tests in a suite, I start getting negative values.
Thanks
JohnC
Scenario
'org.eclipse.cdt.core.tests.performance.parser.ASTServiceCPP ParserTest#testT
rilogyLocationPerformance()' (average over 20 samples):
Used Java Heap: 609.09K
Working Set: 1.6K
Committed: -819
Working Set Peak: 0
Elapsed Process: 109 ms
Kernel time: 0 ms
Page Faults: 0
CPU Time: 109 ms
GDI Objects: 0
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| Re: org.eclipse.test.performance usage [message #284291 is a reply to message #284198] |
Wed, 20 April 2005 09:55  |
| Eclipse User |
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Thanks
"John Arthorne" <john@eclipsefaq.org> wrote in message
news:d43h0h$ohe$1@news.eclipse.org...
> If you look through SDK performance test results, you'll see the same
> thing. This is showing the memory usage delta between the snapshot at
> the beginning and the snapshot at the end. If the garbage collector
> runs during your test, for example, you can end up with negative
> numbers. I agree this is misleading; essentially this information is
> not useful for most tests. For tests where you really want to measure
> the memory growth, I suggest experimenting with running GCs before
> starting your timer to see if this stabilizes your results.
> --
>
> johnc wrote:
> > Hello,
> >
> > I've been trying to use the eclipse performance framework to get a
continual
> > pulse on some of the features in CDT.
> >
> > I am subclassing PerformanceTestCase and I am seeing that I am getting
> > negative values from time to time wrt memory. I'm wondering if there is
> > something I have missed from the HowTo doc that I'm supposed to do to
reset
> > the memory counters properly.
> > When I run one test stand-alone, the counters all work out positive, but
if
> > I run a few tests in a suite, I start getting negative values.
> >
> > Thanks
> > JohnC
> >
> > Scenario
> >
'org.eclipse.cdt.core.tests.performance.parser.ASTServiceCPP ParserTest#testT
> > rilogyLocationPerformance()' (average over 20 samples):
> > Used Java Heap: 609.09K
> > Working Set: 1.6K
> > Committed: -819
> > Working Set Peak: 0
> > Elapsed Process: 109 ms
> > Kernel time: 0 ms
> > Page Faults: 0
> > CPU Time: 109 ms
> > GDI Objects: 0
> >
> >
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