Re: [U-Boot] USB storage performance EHCI question - ext2fs performance
I now have some more information on the performance issue. It appears to be filesystem related. If I format the drive as FAT32 I am getting a transfer rate of approximately 10MB/second. However, if I format it as ext3 I am seeing a transfer rate of only 101KB/second! The only difference is the filesystem and both are clean filesystems. I formatted the drive with: mkfs.ext3 -j -L iomega -O dir_index,has_journal,large_file -t ext3 -v /dev/sdc1 mke2fs 1.41.11 (14-Mar-2010) fs_types for mke2fs.conf resolution: 'ext3', 'default' Calling BLKDISCARD from 0 to 1014095872 failed. Filesystem label=iomega OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 61952 inodes, 247582 blocks 12379 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=255852544 8 block groups 32768 blocks per group, 32768 fragments per group 7744 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376 Writing inode tables: done Creating journal (4096 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 35 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. -Aaron On Friday, January 14, 2011 01:19:04 am Wolfgang Denk wrote: Dear Aaron Williams, please always keep the ML on cc: In message 4d2fa7f0.7020...@caviumnetworks.com you wrote: It is based off of 2010.09 but I have applied all of the latest USB updates from GIT with the exception of the multiple LUN support (this breaks the SanDisk Cruzer because the Cruzer reports max lun=1). All caches are enabled and this is on a 1.2GHz MIPS which is cache-coherent (no need to flush/invalidate). Maybe there are other issues with your code. It's hard to comment on onknown out-of-tree ports. Best regards, Wolfgang Denk ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] USB storage performance EHCI question
On 1/14/2011 1:19 AM, Wolfgang Denk wrote: Dear Aaron Williams, please always keep the ML on cc: In message4d2fa7f0.7020...@caviumnetworks.com you wrote: It is based off of 2010.09 but I have applied all of the latest USB updates from GIT with the exception of the multiple LUN support (this breaks the SanDisk Cruzer because the Cruzer reports max lun=1). All caches are enabled and this is on a 1.2GHz MIPS which is cache-coherent (no need to flush/invalidate). Maybe there are other issues with your code. It's hard to comment on onknown out-of-tree ports. Best regards, Wolfgang Denk I don't think so. The only changes I made were to the register access macros to use a couple assembly functions since our EHCI registers require 64-bit addressing and a very quick virtual to physical conversion for the descriptors which is quite fast. Other than that, the code is stock from GIT. Note that we do not use interrupts either but polling. Unless I'm reading it wrong it also looks like in EHCI it only uses one descriptor and I wonder if this might have something to do with it? I can provide a diff when I return to the office next week. -Aaron ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] USB storage performance EHCI question
Hello. On 13-01-2011 9:09, Wolfgang Denk wrote: Hm... I just notice the caviumnetworks in your address, so this is probably MIPS? Check if your caches are turned on... BTW, Cavium also produces ARMs (like CNS3xxx)... Best regards, Wolfgang Denk WBR, Sergei ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
[U-Boot] USB storage performance EHCI question
I just got EHCI support working with our chip and I was wondering what sort of performance I could expect using ext2? Right now it seems extremely slow coming off of a fast solid-state drive. I'm getting around 100KB/second. It's running at full-speed (480Mbps). Is this normal? We are basically using the standard EHCI driver with only a few minor modifications. -Aaron ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Re: [U-Boot] USB storage performance EHCI question
Dear Aaron Williams, In message 201101121955.04367.aaron.willi...@caviumnetworks.com you wrote: I just got EHCI support working with our chip and I was wondering what sort of performance I could expect using ext2? Right now it seems extremely slow coming off of a fast solid-state drive. I'm getting around 100KB/second. It's running at full-speed (480Mbps). Is this normal? As you don't provide any of the important information let me guess: this is on an ARM board, and you are using U-Boot version v2010.09 or older? If this is true then yes, this is to be expected. Hm... I just notice the caviumnetworks in your address, so this is probably MIPS? Check if your caches are turned on... Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de The universe, they said, depended for its operation on the balance of four forces which they identified as charm, persuasion, uncertainty and bloody-mindedness. -- Terry Pratchett, The Light Fantastic ___ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
