Improve PXE Over IPv4 performance:

1. Stop UdpWrite instance upon return from EfiPxeBcUdpWrite() to avoid mass pkgs enqueue to this useless instance in Udp layer.
2. Enhance Udp timeout logic to prevent the worst case happen, and set PxeUdp instance to 50ms to avoid enqueue mass pkgs in background.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10861 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 16 insertions, 12 deletions

diff --git a/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcImpl.c b/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcImpl.c
index ba8fe5c429..50736a9731 100644
--- a/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcImpl.c
+++ b/MdeModulePkg/Universal/Network/UefiPxeBcDxe/PxeBcImpl.c
@@ -1407,20 +1407,20 @@ EfiPxeBcUdpWrite (
     if (SrcPort != NULL) {

       Private->CurrentUdpSrcPort = *SrcPort;

     }

-

-    Status = PxeBcConfigureUdpWriteInstance (

-               Udp4,

-               &Private->StationIp.v4,

-               &Private->SubnetMask.v4,

-               &Private->GatewayIp.v4,

-               &Private->CurrentUdpSrcPort

-               );

-    if (EFI_ERROR (Status)) {

-      Private->CurrentUdpSrcPort = 0;

-      return EFI_INVALID_PARAMETER;

-    }

   }

 

+  Status = PxeBcConfigureUdpWriteInstance (

+             Udp4,

+             &Private->StationIp.v4,

+             &Private->SubnetMask.v4,

+             &Private->GatewayIp.v4,

+             &Private->CurrentUdpSrcPort

+             );

+  if (EFI_ERROR (Status)) {

+    Private->CurrentUdpSrcPort = 0;

+    return EFI_INVALID_PARAMETER;

+  }

+  

   ZeroMem (&Token, sizeof (EFI_UDP4_COMPLETION_TOKEN));

   ZeroMem (&Udp4Session, sizeof (EFI_UDP4_SESSION_DATA));

 

@@ -1492,6 +1492,10 @@ ON_EXIT:
 

   FreePool (Udp4TxData);

 

+  //

+  // Reset the instance.

+  //

+  Udp4->Configure (Udp4, NULL);

   return Status;

 }