From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Rini Date: Fri, 17 Jan 2014 08:06:08 -0500 Subject: [U-Boot] [U-Boot, 3/3] config: Update envs for trats and trats2 - Disable L2 cache In-Reply-To: <1389682946-29694-4-git-send-email-l.majewski@samsung.com> References: <1389682946-29694-4-git-send-email-l.majewski@samsung.com> Message-ID: <20140117130608.GA5181@bill-the-cat> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 > Acked-by: Minkyu Kang Applied to u-boot/master, thanks! -- Tom -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 836 bytes Desc: Digital signature URL: