JDK-5043070 : Long time to restore minimized application
  • Type: Bug
  • Component: client-libs
  • Sub-Component: java.awt
  • Affected Version: 1.4.2
  • Priority: P2
  • Status: Resolved
  • Resolution: Fixed
  • OS: windows_xp
  • CPU: x86
  • Submitted: 2004-05-06
  • Updated: 2017-05-16
  • Resolved: 2004-06-16
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Other
5.0 b56Fixed
Description
When you minimize any other large Java app (like NetBeans IDE) that manages to be really idle
when minimized on Windows, it is totally swapped out, and once you switch to it, it is feeling
like a zombie for next few minutes.
###@###.### 2004-05-06
###@###.### 2004-05-07

Comments
EVALUATION The time to restore a minimized Java GUI application has nothing at all to do with paging unless the system in question has insufficient main memory and other activiity on the system would cause the Java app's working set to be stolen away. But this effect would be noticeable whether or not the GUI was minimized. But more fundamentally Sun's J2SE implementation, at the VM level at least, has no mechanism for overriding the VM policy of the operating system and causing it's own working set to be "trimmed." There is also no means by which the VM can cause its pages to be swapped out: this behavior is imposed by the OS in response to other demands for virtual memmory. Name: ssR10077 Date: 05/25/2004 Problem: The time to restore a minimized Java GUI application has nothing at all to do with paging unless the system in question has insufficient main memory and other activity on the system would cause the Java app's working set to be stolen away. But this effect would be noticeable whether or not the GUI was minimized. But more fundamentally Sun's J2SE implementation, at the VM level at least, has no mechanism for overriding the VM policy of the operating system and causing it's own working set to be "trimmed." There is also no means by which the VM can cause its pages to be swapped out: this behavior is imposed by the OS in response to other demands for virtual memory. Requesters: Net Beans, ###@###.### Solution: Make a system property to allow Java application disable the working set trimming as described in MSKB article 293215. To do so application should override the processing of WM_SYSCOMMAND (wParam == SC_MINIMIZE) and programmatically minimize the window. The feature is turned off by default, so the behavior of unwilling applications will not be changed. Interface summary exported private other System property java.awt.trimWorkingSetOnMinimize Specification Microsoft Knowledge Base Article - 293215 PRB: An Application's Working Set Is Trimmed When Its Top-Level Window Is Minimized is available on URL http://support.microsoft.com/default.aspx?scid=kb;en-us;293215 sun.awt.keepWorkingSetOnMinimize if sun.awt.keepWorkingSetOnMinimize=="true", the working set trimming is disabled, otherwise the default OS behavior is preserved. Compatibility risk: minimal ====================================================================== ###@###.### 2004-11-09 22:34:31 GMT ###@###.### 2004-11-09 22:35:42 GMT ###@###.### 2004-11-09 22:36:09 GMT
2004-11-09

CONVERTED DATA BugTraq+ Release Management Values COMMIT TO FIX: tiger-rc FIXED IN: tiger-rc INTEGRATED IN: tiger-b56 tiger-rc
2004-09-17

SUGGESTED FIX Do not trim working set of an application on minimize using similar approach as in Mozilla as described in http://bugzilla.mozilla.org/show_bug.cgi?id=76831 ###@###.### 2004-05-06 Name: ssR10077 Date: 05/25/2004 *** /export/bino/t3/webrev/src/windows/classes/sun/awt/windows/WFramePeer.java- Thu Apr 29 20:08:49 2004 --- WFramePeer.java Thu Apr 29 19:23:42 2004 -------------------------------------------------------------------------------- *** 31,40 **** --- 31,50 ---- // Convenience methods to save us from trouble of extracting // Rectangle fields in native code. private native void setMaximizedBounds(int x, int y, int w, int h); private native void clearMaximizedBounds(); + private static boolean trimOnMinimize = true; + + static { + String trim = System.getProperty("java.awt.trimWorkingSetOnMinimize","true"); + System.out.println("java.awt.trimWorkingSetOnMinimize = " + trim); + if (trim.equals("false")) { + trimOnMinimize = false; + } + } + public void setMaximizedBounds(Rectangle b) { if (b == null) { clearMaximizedBounds(); } else { setMaximizedBounds(b.x, b.y, b.width, b.height); *** /export/bino/t3/webrev/src/windows/native/sun/windows/awt_Frame.cpp- Thu Apr 29 20:08:50 2004 --- awt_Frame.cpp Thu Apr 29 20:01:54 2004 -------------------------------------------------------------------------------- *** 938,948 **** --- 938,962 ---- return TRUE; CATCH_BAD_ALLOC_RET(FALSE); } + static BOOL trimChecked = FALSE; + static BOOL trim = FALSE; + static BOOL trimOnMinimize(jobject peer) { + if (trimChecked == TRUE ) { + return trim; + } + else { + JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); + trim = ((JNU_GetStaticFieldByName(env, NULL, "sun/awt/windows/WFramePeer", "trimOnMinimize", "Z").z) == JNI_FALSE) ? FALSE : TRUE; + trimChecked = TRUE; + } + return trim; + } + MsgRouting AwtFrame::WmSysCommand(UINT uCmdType, int xPos, int yPos) { if (uCmdType == (SYSCOMMAND_IMM & 0xFFF0)){ JNIEnv *env = (JNIEnv *)JNU_GetEnv(jvm, JNI_VERSION_1_2); if (env->EnsureLocalCapacity(2) < 0) { -------------------------------------------------------------------------------- *** 951,960 **** --- 965,980 ---- JNU_CallMethodByName(env, NULL, m_peerObject, "notifyIMMOptionChange", "()V"); DASSERT(!safe_ExceptionOccurred(env)); return mrConsume; } + if ((uCmdType == SC_MINIMIZE) && !trimOnMinimize(m_peerObject)) { + printf("Vetoing Trim on Minimize "); + fflush(stdout); + ::ShowWindow(GetHWnd(),SW_SHOWMINIMIZED); + return mrConsume; + } return AwtWindow::WmSysCommand(uCmdType, xPos, yPos); } LRESULT AwtFrame::WinThreadExecProc(ExecuteArgs * args) { ======================================================================
2004-09-17