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From: Tom Rini <trini@konsulko.com>
To: Stefan Roese <sr@denx.de>
Cc: u-boot@lists.denx.de, sjg@chromium.org
Subject: Re: [PATCH v1 0/5] arm64: Add optimized memset/memcpy functions
Date: Fri, 6 Aug 2021 10:24:00 -0400	[thread overview]
Message-ID: <20210806142400.GX858@bill-the-cat> (raw)
In-Reply-To: <20210806133843.3642916-1-sr@denx.de>

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On Fri, Aug 06, 2021 at 03:38:38PM +0200, Stefan Roese wrote:

> 
> On an NXP LX2160 based platform it has been noticed, that the currently
> implemented memset/memcpy functions for aarch64 are suboptimal.
> Especially the memset() for clearing the NXP MC firmware memory is very
> expensive (time-wise).
> 
> By using optimized functions, a speedup of ~ factor 6 has been measured.
> 
> This patchset now adds the optimized functions ported from this
> repository:
> https://github.com/ARM-software/optimized-routines
> 
> As these functions make use of opcodes that need the caches to be
> enabled, they can't be used in the very early boot stage, before the
> caches are enabled. Because of this, a simple memset() version is also
> added, in this case memset_simple(), and will be used in very few
> selected places.
> 
> Please note that checkpatch.pl complains about some issue with this
> imported file: arch/arm/lib/asmdefs.h
> Since it's imported I did explicitly not make any changes here, to make
> potential future sync'ing easer.

Traditionally, we grab the linux kernel's optimized functions.  Are
there not a set to grab there?

-- 
Tom

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  parent reply	other threads:[~2021-08-06 14:24 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-06 13:38 [PATCH v1 0/5] arm64: Add optimized memset/memcpy functions Stefan Roese
2021-08-06 13:38 ` [PATCH v1 1/5] lib/string: Add memset_simple() Stefan Roese
2021-08-06 15:36   ` Wolfgang Denk
2021-08-06 16:13     ` Heinrich Schuchardt
2021-08-07 15:18       ` Wolfgang Denk
2021-08-07 15:34         ` Tom Rini
2021-08-06 13:38 ` [PATCH v1 2/5] board_init: Use memset_simple() in board_init_f_init_reserve() Stefan Roese
2021-08-09  7:52   ` Rasmus Villemoes
2021-08-09 13:17     ` Stefan Roese
2021-08-06 13:38 ` [PATCH v1 3/5] arm64: cache_v8: Use memset_simple() in create_table() Stefan Roese
2021-08-06 13:38 ` [PATCH v1 4/5] arm64: arch/arm/lib: Add optimized memset/memcpy functions Stefan Roese
2021-08-06 14:43   ` Tom Rini
2021-08-06 14:45     ` Stefan Roese
2021-08-06 15:41   ` Wolfgang Denk
2021-08-06 13:38 ` [PATCH v1 5/5] arm64: Kconfig: Enable usage of optimized memset/memcpy Stefan Roese
2021-08-06 14:24 ` Tom Rini [this message]
2021-08-06 14:44   ` [PATCH v1 0/5] arm64: Add optimized memset/memcpy functions Stefan Roese

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