From: Tom Rini <trini@ti.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [U-Boot, 3/3] config: Update envs for trats and trats2 - Disable L2 cache
Date: Fri, 17 Jan 2014 08:06:08 -0500 [thread overview]
Message-ID: <20140117130608.GA5181@bill-the-cat> (raw)
In-Reply-To: <1389682946-29694-4-git-send-email-l.majewski@samsung.com>
On Tue, Jan 14, 2014 at 08:02:26AM +0100, ?ukasz Majewski wrote:
> Disable L2 caches for Trats and Trats2 devices.
>
> It turns out that for data downloading with thordown command L2 cache
> disablement brings a significant speed improvement.
>
> rootfs - 400 MiB:
> - L2 cache enabled: 2.69 MiB/s
> - L2 cache disabled: 5.56 MiB/s
>
> Such improvement is possible due to reduction of the need to invalidate
> redundant data, which resides in L2 cache.
>
> Since the sent USB request size at once is 512B (L1 - 32 KiB in total) -
> one can be quite confident that it is already available in L1 and L2 can
> be disabled.
>
> Change-Id: I911ea18075526f7e8295c30dfcf7a658ebc4e53b
> Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
> Acked-by: Minkyu Kang <mk7.kang@samsung.com>
Applied to u-boot/master, thanks!
--
Tom
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next prev parent reply other threads:[~2014-01-17 13:06 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-14 7:02 [U-Boot] [PATCH 0/3] fix: Trats/Trats2 default envs adjustement for 2014.01 release Lukasz Majewski
2014-01-14 7:02 ` [U-Boot] [PATCH 1/3] config: Update envs for trats and trats2 - new entries for new partitions Lukasz Majewski
2014-01-14 9:57 ` Minkyu Kang
2014-01-15 16:12 ` Gerhard Sittig
2014-01-15 20:32 ` Lukasz Majewski
2014-01-16 16:10 ` Gerhard Sittig
2014-01-16 22:12 ` Wolfgang Denk
2014-01-17 14:11 ` Gerhard Sittig
2014-01-17 13:05 ` [U-Boot] [U-Boot, " Tom Rini
2014-01-14 7:02 ` [U-Boot] [PATCH 2/3] ARM: trats2: dfu: Enable default Poll Timeout for Trats2 board Lukasz Majewski
2014-01-14 9:57 ` Minkyu Kang
2014-01-17 13:06 ` [U-Boot] [U-Boot, " Tom Rini
2014-01-14 7:02 ` [U-Boot] [PATCH 3/3] config: Update envs for trats and trats2 - Disable L2 cache Lukasz Majewski
2014-01-14 9:57 ` Minkyu Kang
2014-01-17 13:06 ` Tom Rini [this message]
2014-01-17 10:34 ` [U-Boot] [PATCH 0/3] fix: Trats/Trats2 default envs adjustement for 2014.01 release Lukasz Majewski
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