[ phpeclipse-Bugs-1437599 ] High CPU usage when using debugger

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Newsgroups gmane.comp.ide.eclipse.phpeclipse.devel
Message-ID <[email protected]> 
Bugs item #1437599, was opened at 2006-02-23 19:26
Message generated for change (Comment added) made by robekras
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Category: Debugger
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Dmitry Dulepov (liels_bugs)
Assigned to: Robert Kraske (robekras)
Summary: High CPU usage when using debugger

Initial Comment:
If debug session is running and there were breaks on
breakpoints, debugger consumes significant cpu power
even when browser is idle (finished page loading). It
takes around 87% of CPU when computer does nothing.
Computer runs significally slower than usual.

----------------------------------------------------------------------

>Comment By: Robert Kraske (robekras)
Date: 2006-08-29 13:30

Message:
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Regarding dbg, the bug is fixed in dbg version 2.15.1.




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Comment By: Robert Kraske (robekras)
Date: 2006-06-16 08:33

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Regarding the high cpu load when script has finished:

The problem is in dbg.
When a script has finished there should be send a DBGC_END
event from dbg to PHPeclipse. But this event is never
send by dbg because the socket is closed before.

In addition, PHPeclipse misses a handling of this event.
I added the required modification to the CVS.

I also informed Dimitri about the bug, and it seems that he
aggrees.

I made a modification to dbg and tried it, and it works as
expected.

Robert

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Comment By: tnickl (tnickl)
Date: 2006-04-19 15:07

Message:
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Have this same problem. 

I call my phpeclipse plugin running on 192.168.1.2:1001
using:
http://test.lan.de/[email protected]:10001

test.lan.de is a linux-Machine using php4.3.11.

CPU-Usage goes to 100% when debug.php has finished running
for the first time while the debugger session on 10001 is
still active. It will leave the 100% if I
- Call the url http://test.. (see above) again
- or: Push the red "Terminate" - Square-Button in the Toolbar.

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Comment By: Mauro Casciari (incastrix)
Date: 2006-03-25 16:58

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I only notify it!
I know it isnt a solution.

I think the only solution is to debug debugger again :D
debugger threads and brekpoint first.

Mauro

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Comment By: Rob (rbarreca)
Date: 2006-03-25 01:17

Message:
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It's not really an option to stop debugging when the CPU is
at 100%...because everytime I debug it does this.  So
whenever I'm using debugging, the computer is incredibly slow.

Anyone have any insight for me?

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Comment By: Mauro Casciari (incastrix)
Date: 2006-03-15 20:40

Message:
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Sometime simply stop debug session and delete all breakpoint
release cpu resource.

Mauro Casciari

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Comment By: Rob (rbarreca)
Date: 2006-03-15 20:05

Message:
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I have the same thing happening when using DBG.  I'm on
Eclipse 3.1.2, PHPeclipse CVS20060223, Win XP, 1 GB RAM, 2.1
MHz machine.  A restart helps but the problem returns.

Starting options: (changed to try and help problem)
-vm C:\Program Files\Java\jre1.5.0_06\bin
-vmargs
-Xms64m
-Xmx384m

Have also got Subclipse and ESFTP running, but that's about it.

Got quite a few of these 3 errors in my .log.  Any ideas?

-----------------
Error #1
-----------------
!ENTRY org.eclipse.ui 4 4 2006-03-14 11:54:09.997
!MESSAGE Unhandled event loop exception

-----------------
Error #2
-----------------
!ENTRY org.eclipse.ui 4 0 2006-03-14 11:54:09.997
!MESSAGE Failed to execute runnable
(java.lang.NullPointerException)
!STACK 0
org.eclipse.swt.SWTException: Failed to execute runnable
(java.lang.NullPointerException)
	at org.eclipse.swt.SWT.error(SWT.java:2942)
	at org.eclipse.swt.SWT.error(SWT.java:2865)
	at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:126)
	at
org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3102)
	at
org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2761)
	at
org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1699)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663)
	at
org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:367)
	at
org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
	at
org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103)
	at
org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:226)
	at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
	at
org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown
Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at
org.eclipse.core.launcher.Main.invokeFramework(Main.java:334)
	at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
	at org.eclipse.core.launcher.Main.run(Main.java:973)
	at org.eclipse.core.launcher.Main.main(Main.java:948)
Caused by: java.lang.NullPointerException
	at
net.sourceforge.phpeclipse.ui.editor.ShowExternalPreviewAction.getLocalhostURL(ShowExternalPreviewAction.java:107)
	at
net.sourceforge.phpeclipse.ui.editor.BrowserUtil.getShowInContext(BrowserUtil.java:42)
	at
net.sourceforge.phpeclipse.ui.editor.BrowserUtil.showPreview(BrowserUtil.java:107)
	at
net.sourceforge.phpdt.internal.launching.DebuggerRunner$1.run(DebuggerRunner.java:67)
	at
org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at
org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:123)
	... 18 more

-----------------
Error #3
-----------------
!ENTRY net.sourceforge.phpeclipse.debug.core 4 4 2006-03-14
11:54:17.227
!MESSAGE PHPLaunchingPlugin.internalErrorOccurred
!STACK 0
java.net.SocketException: socket closed
	at java.net.PlainSocketImpl.socketAccept(Native Method)
	at java.net.PlainSocketImpl.accept(Unknown Source)
	at java.net.ServerSocket.implAccept(Unknown Source)
	at java.net.ServerSocket.accept(Unknown Source)
	at
net.sourceforge.phpdt.internal.debug.core.PHPDBGProxy$PHPLoop.run(PHPDBGProxy.java:571)


----------------------------------------------------------------------

Comment By: Dmitry Dulepov (liels_bugs)
Date: 2006-02-28 13:25

Message:
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Typical for Java... It starts garbage-collect resources when
it cannot allocate more of them :) Ever wondered why Java
may not be used for nuclear facilities? It is not fault-safe.

----------------------------------------------------------------------

Comment By: Mauro Casciari (incastrix)
Date: 2006-02-28 13:08

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when I start eclipse it consume about 50 Mb, after an hour
of debug it consume about 90 Mb :o

Mauro Casciari

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Comment By: Dmitry Dulepov (liels_bugs)
Date: 2006-02-28 07:50

Message:
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I do not think it is a problem with resources. If resorce is
not released, it is just memory. The problem is high cpu usage.

----------------------------------------------------------------------

Comment By: Mauro Casciari (incastrix)
Date: 2006-02-27 18:31

Message:
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surely this is a problem of phpeclise plugin, because i've
the same problem on windows box. this happen after the first
debug session. i'm not a java programmer but I've already
debugged the phpeclipse PHP DBG.
the first thing to do is to find the code that not release
resource.

Mauro Casciari


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Comment By: Dmitry Dulepov (liels_bugs)
Date: 2006-02-27 07:54

Message:
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Environment
=================
Hardware:
M/b: EPoX 8RDA
CPU: AMD Athlon 1.2MHz
RAM: 512Mb
Looks pretty old but visually it runs faster than 3.2MHz
P-VI with Hyperthreading at my work.

Software:
SuSE Linux 10.0
Eclipse 3.1.2
phpEclipse, CVS version, begining of February
DBG 2.11.32 (compiled myself for PHP 4.4.1
Apache 2.2 + PHP 4.4.1 (XAMPP)
======================

I do not know how phpEclipse works with DBG, but it seems
there is a loop that polls DBG status and never idles. If
phpEclipse listens on a socket, consider using non-blocking
sockets (packages java.nio and java.nio.channels). This way
thread will sleep until it is called by the debugger.

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Comment By: Mauro Casciari (incastrix)
Date: 2006-02-26 20:19

Message:
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I've just talk about this problem with Robert Kraske a
couple month ago.

I had debugged the php debugger (php DBG) and it seems that
some threads never ended and also never release resource.

Can you post your environment?

Mauro Casciari

----------------------------------------------------------------------

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