From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Gehrlein Date: Wed, 17 Dec 2008 07:24:55 +0100 Subject: [U-Boot] [PATCH 0/2] CFI: increase performance In-Reply-To: <20081216171315.GE24266@game.jcrosoft.org> References: <20081216162453.2866.750.stgit@tq-sewsrv-4.tq-net.de> <20081216163602.GC24266@game.jcrosoft.org> <4947DB7E.2030101@tqs.de> <20081216171315.GE24266@game.jcrosoft.org> Message-ID: <49489B37.9020000@tqs.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Dear Jean-Christophe, Jean-Christophe PLAGNIOL-VILLARD schrieb: > On 17:46 Tue 16 Dec , Jens Gehrlein wrote: >> Jean-Christophe PLAGNIOL-VILLARD schrieb: >>> On 17:25 Tue 16 Dec , Jens Gehrlein wrote: >>>> Hi list, >>>> >>>> The following patches should increase the performance of the CFI driver, >>>> particularly with regard to single word programming mode. >>>> >>>> I tested it on TQM5200S with NOR-Flash Samsung K8P2815UQB, which has no >>>> write buffer. At least no write buffer, that could be programmed using >>>> standard commands. >>>> >>>> Performance increase on this TQM is about factor 2.6 (37 KiB/s -> 95 KiB/s). >>>> On the same module with Spansion S29GL128N (with write buffer) it is about >>>> factor 1.2 (455 KiB/s -> 585 KiB/s). >>>> >>>> TQM5200 is a bottom boot module with 2x16 Bit Flash connection. Could someone >>>> test the patches on other HW, particularly top boot, other CPU, other flash >>>> width, please? >>> Could you try it against the qemu SVN HEAD >> ??? Sorry, what is qemu SVN HEAD ??? >> > In qemu you have 2 boards emulated with u-boot support qemu_mips and SX1 Now, I understand, what you meant. > > it'll be nice to test them also > > please note they are only in the SVN tree of qemu Because I'm neither familiar with qemu nor with svn I can't do that with little effort (installation, familiarization, etc.). Beside that, how could a virtual machine simulate the real bus access with it's bus timing? If I'm right in this point, only testing on another architecture is possible, but no performance test. Shortly, I will get a TQM8548 with Samsung Flash. It's a top boot system, but also has a 2x16 Bit Flash connection. For my part, I can only offer you a test on this board. Stefan, as the CFI custodian, how is your procedure to check such kind of common code patches? Kind regards, Jens