[PATCH 15/22] vfb: Use shared NoopDDA to utilize code cache better

Pauli ext-pauli.nieminen at nokia.com
Wed Dec 29 11:27:27 PST 2010


From: Pauli Nieminen <ext-pauli.nieminen at nokia.com>

Calling function that is in code cache is order of magnitude faster. In
arm non-cached simple function takes about 1us while cached function
takes max 200ns.

Signed-off-by: Pauli Nieminen <ext-pauli.nieminen at nokia.com>
---
 hw/vfb/InitOutput.c |    9 +--------
 1 files changed, 1 insertions(+), 8 deletions(-)

diff --git a/hw/vfb/InitOutput.c b/hw/vfb/InitOutput.c
index 53f82f9..366a01f 100644
--- a/hw/vfb/InitOutput.c
+++ b/hw/vfb/InitOutput.c
@@ -546,13 +546,6 @@ vfbBlockHandler(pointer blockData, OSTimePtr pTimeout, pointer pReadmask)
     }
 }
 
-
-static void
-vfbWakeupHandler(pointer blockData, int result, pointer pReadmask)
-{
-}
-
-
 static void
 vfbAllocateMmappedFramebuffer(vfbScreenInfoPtr pvfb)
 {
@@ -599,7 +592,7 @@ vfbAllocateMmappedFramebuffer(vfbScreenInfoPtr pvfb)
 	return;
     }
 
-    if (!RegisterBlockAndWakeupHandlers(vfbBlockHandler, vfbWakeupHandler,
+    if (!RegisterBlockAndWakeupHandlers(vfbBlockHandler, (WakeupHandlerProcPtr)NoopDDA,
 					NULL))
     {
 	pvfb->pXWDHeader = NULL;
-- 
1.7.0.4



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