On 3/1/24 08:11, Li, Zhihao wrote:
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4697
>
> EvacuateTempRam function will copy the temporary memory context to the rebased
> pages and the raw pages. Migrations of rebased PEIMs is from cache to memory,
> while raw PEIMs is from memory to memory. So the migrations of raw PEIMs
> is slower than rebased PEIMs. Experimental data indicates that changing the
> source
> address of raw PEIMs migration will improve performance by 35%.
>
> Cc: Liming Gao <gaolim...@byosoft.com.cn>
> Signed-off-by: Zhihao Li <zhihao...@intel.com>
> ---
> MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c
> b/MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c
> index 4cd8c843cd..ca37bde482 100644
> --- a/MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c
> +++ b/MdeModulePkg/Core/Pei/Dispatcher/Dispatcher.c
> @@ -1,7 +1,7 @@
> /** @file
> EFI PEI Core dispatch services
>
> -Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
> +Copyright (c) 2006 - 2024, Intel Corporation. All rights reserved.<BR>
> (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
> @@ -1305,7 +1305,7 @@ EvacuateTempRam (
> );
> ASSERT_EFI_ERROR (Status);
> RawDataFvHeader = (EFI_FIRMWARE_VOLUME_HEADER
> *)(UINTN)FvHeaderAddress;
> - CopyMem (RawDataFvHeader, MigratedFvHeader,
> (UINTN)FvHeader->FvLength);
> + CopyMem (RawDataFvHeader, FvHeader, (UINTN)FvHeader->FvLength);
> MigratedFvInfo.FvDataBase = (UINT32)(UINTN)RawDataFvHeader;
> }
>
Merged as
7 371940932d29 MdeModulePkg/Core/Pei: Improve the copy performance
via <https://github.com/tianocore/edk2/pull/5432>.
Laszlo
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