From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from rgminet01.oracle.com ([148.87.113.118]) by canuck.infradead.org with esmtps (Exim 4.63 #1 (Red Hat Linux)) id 1Gphcu-0007am-HP for linux-mtd@lists.infradead.org; Thu, 30 Nov 2006 03:50:46 -0500 Received: from rgmgw3.us.oracle.com (rgmgw3.us.oracle.com [138.1.186.112]) by rgminet01.oracle.com (Switch-3.2.4/Switch-3.1.6) with ESMTP id kAU8oX8K012836 for ; Thu, 30 Nov 2006 01:50:33 -0700 Received: from [10.179.121.103] (dhcp-skc-10-179-121-103.kr.oracle.com [10.179.121.103]) by rgmgw3.us.oracle.com (Switch-3.2.4/Switch-3.1.7) with ESMTP id kAU8oVgS022154 for ; Thu, 30 Nov 2006 01:50:31 -0700 Message-ID: <456E9B4F.5080806@oracle.com> Date: Thu, 30 Nov 2006 17:50:23 +0900 From: Howard Yoo MIME-Version: 1.0 To: linux-mtd@lists.infradead.org Subject: performance of JFFS and YAFFS in terms of in-place updates Content-Type: multipart/mixed; boundary="------------090000050700000906030405" Reply-To: hyunggook.yoo@oracle.com List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a multi-part message in MIME format. --------------090000050700000906030405 Content-Type: text/plain; charset=EUC-KR Content-Transfer-Encoding: 7bit Dear members, we're testing the performance btw. JFFS and YAFFS, and we're currently using nand simulator to simulate the nand flash behavior (since we don't have the physical flash for our testing) on linux kernel 2.6.17. While running both FFS's, we've found out that somehow, JFFS shows much better performance than YAFFS, in terms of in-place updates and erase counts. However, we're not really sure whether this is the right figure, and since we're new in dealing with nand flash memory, we want to be sure if there is a specific(proper) ways to run JFFS on nand simulator., or is there any nand simulator specifically tuned for YAFFS, or is it that simply JFFS is better in terms of in-place updates compared to YAFFS? --------------090000050700000906030405 Content-Type: text/x-vcard; charset=utf-8; name="hyunggook.yoo.vcf" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="hyunggook.yoo.vcf" YmVnaW46dmNhcmQNCmZuOkh5dW5nIEdvb2sgWW9vDQpuOllvbztIeXVuZyBHb29rDQpvcmc6 T0FSREM7S29yZWENCmFkcjo7OztTZW91bDs7O1NvdXRoIEtvcmVhDQplbWFpbDtpbnRlcm5l dDpoeXVuZ2dvb2sueW9vQG9yYWNsZS5jb20NCnRpdGxlOk1lbWJlciBvZiB0aGUgdGVjaG5p Y2FsIHN0YWZmDQp0ZWw7d29yazorODIuMi4yMTk0Ljc1NjINCm5vdGU6PGltZyBzcmM9Imh0 dHA6Ly9waG90b3MxLmJsb2dnZXIuY29tL2Jsb2dnZXIvNjQzOS80MDQvMzIwL0h5dW5nR29v a1lvb19lbl80MDAuanBnIiBib3JkZXI9IjAiIC8+DQp4LW1vemlsbGEtaHRtbDpUUlVFDQp2 ZXJzaW9uOjIuMQ0KZW5kOnZjYXJkDQoNCg== --------------090000050700000906030405--