On Wed, 24 Mar 2004, David Brownell wrote: > Pat LaVarre wrote: > > > In practice, I haven't yet proven that any of my devices actually do > > benefit from a max GB/cdb greater than 0.000065536 while an fs is > > mounted ... > > You mean, 64 KByte/request? I'm curious what the relevant number > is for IDE or SATA... and how disk and page caching affect it. > > Things like MKFS (and badblocks) certainly like to issue > much bigger requests. > > > > If we make that easy for me to prove, then we will have created a > > volunteer to work towards making the whitelisting more automagic. > > Assuming max_sectors is changeable through sysfs, the experiment > would be just to measure elapsed time while doing various common > tasks. There are lots of benchmarks available.
It is indeed changeable through sysfs, although only for USB devices. BTW, in case it wasn't already clear, the sizeable benefit David was talking about really applies only to high-speed devices. Full-speed devices won't notice the difference nearly as much. Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
