Re: [edk2-devel] [PATCH v1] MdeModulePkg/Core/Pei: Improve the copy performance

["Laszlo Ersek" <lersek@redhat.com>]

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 <gaoliming@byosoft.com.cn>
> Signed-off-by: Zhihao Li <zhihao.li@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



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#116283): https://edk2.groups.io/g/devel/message/116283
Mute This Topic: https://groups.io/mt/104659917/7686176
Group Owner: devel+owner@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io]
-=-=-=-=-=-=-=-=-=-=-=-