SetMemoryAttributes() will sync BSP's MTRRs settings to all APs by StartupAllAPs
service in serial mode. It may caused much performance impact if there are too
much processors in system. This update is to invoke StartupAllAps in parallel
mode. IA32 SDM does suggest to program MTRRs in parallel mode.
Cc: Michael Kinney <michael.d.kin...@intel.com>
Cc: Feng Tian <feng.t...@intel.com>
Cc: Laszlo Ersek <ler...@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff....@intel.com>
Reviewed-by: Feng Tian <feng.t...@intel.com>
---
UefiCpuPkg/CpuDxe/CpuDxe.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.c b/UefiCpuPkg/CpuDxe/CpuDxe.c
index daf97bd..78b2c88 100644
--- a/UefiCpuPkg/CpuDxe/CpuDxe.c
+++ b/UefiCpuPkg/CpuDxe/CpuDxe.c
@@ -1,7 +1,7 @@
/** @file
CPU DXE Module.
- Copyright (c) 2008 - 2013, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2008 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD
License
which accompanies this distribution. The full text of the license may be
found at
@@ -422,7 +422,7 @@ CpuSetMemoryAttributes (
MpStatus = MpService->StartupAllAPs (
MpService, // This
SetMtrrsFromBuffer, // Procedure
- TRUE, // SingleThread
+ FALSE, // SingleThread
NULL, // WaitEvent
0, // TimeoutInMicrosecsond
&MtrrSettings, // ProcedureArgument
--
2.7.4.windows.1
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.01.org
https://lists.01.org/mailman/listinfo/edk2-devel
