[U-Boot] [PATCH v2 5/5] fastboot: sparse: improve CHUNK_TYPE_FILL write performance

[Maxime Ripard]

On Tue, Jun 07, 2016 at 11:19:39AM -0700, Steve Rae wrote:
> - increase the size of the fill buffer
> - testing has shown a 10x improvement when the sparse image
>   has large CHUNK_TYPE_FILL chunks
> 
> Signed-off-by: Steve Rae <srae at broadcom.com>
> ---
> 
> Changes in v2: None
> 
>  common/image-sparse.c | 37 +++++++++++++++++++++++++++----------
>  1 file changed, 27 insertions(+), 10 deletions(-)
> 
> diff --git a/common/image-sparse.c b/common/image-sparse.c
> index 9632c6f..ddf5772 100644
> --- a/common/image-sparse.c
> +++ b/common/image-sparse.c
> @@ -1,4 +1,3 @@
> -
>  /*
>   * Copyright (c) 2009, Google Inc.
>   * All rights reserved.
> @@ -46,6 +45,10 @@
>  
>  #include <linux/math64.h>
>  
> +#ifndef CONFIG_FASTBOOT_FLASH_FILLBUF_SIZE
> +#define CONFIG_FASTBOOT_FLASH_FILLBUF_SIZE (1024 * 512)

I wonder whether that would be better to just put the number of blocks
there.

NAND blocks are much larger than MMC's, so the gain benefit might not
be even.

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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