Hi Edk2 developers,
After upate to UDK2015 from UDk2014, the Uiapp setup shows very slow. the
following is our issue and debug information. Anyone meet similar issue before?
Issue symptom:
1, System draw the Front Page cost about 2 second. We can see the frame/ menu
block/ help block draw one by one. Other submenu has same slowly display when
enter it.
Normally those are instantaneous work .
2, Change the highlight item in one page meet about half-second delay response.
3, In Data and time page. We can see the scan line to update the time display
from top-left to bottom-right.
4, In shell environment, “drivers” command can show title part normally, but it
display the number of driver with a visible slow speed. ”PCI” command still has
normal behave.
Debug step:
1, Doubt that call back function hook to the form will case this issue .Try to
remove the callback function for all the form.
Issue still happened.
2. Because the setup has may loop invoke, Try to fixed a single delay point for
more debug.
In “DisplayPageFrame” when try to clear the screen for First Form display ,
there is about 1-2 second single delay point inside
ClearLines (0, gScreenDimensions.RightColumn, 0, gScreenDimensions.BottomRow,
KEYHELP_BACKGROUND);
Trace the string passed to clear screen in this routing .The string is same
with the UDK2014 normal case. This can preliminary exclusion the string
analysis issue and special font issue.
3, Deep debug, Delay is happened in “PrintInternal” try to invoke
”Out->OutputString(XXXXXX)”.
This Out is point to system table conout , There is only one SimpleTextOutput
“GraphicsConsoleController” in consplitter list in our project.
And the GOP protocol install optrom in both UDK2014 and UDK2015 are the
same one. BTW, The logo display and post information display has no delay
symptom.
4, There is three ”Out->OutputString(XXXXXX)” invoke “PrintInternal”, String
is display by first two after remove the CHAR type. the last invoke is used for
display space to meet the request display size.
If we don’t do this work. Symptom 2 Will have a great improvement.
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