Sorry I don't have a boot chart handy. Most of what I look at is the time to the various log events representing key points during system boot.
On Fri, May 14, 2010 at 12:15 PM, Tim Bird <[email protected]> wrote: > On 05/14/2010 12:02 PM, Dianne Hackborn wrote: > > On Wed, May 12, 2010 at 7:40 AM, Chen Yang <[email protected] > > <mailto:[email protected]>> wrote: > > > > Cool! Would you like to share some insights on what makes the > > preloading and scan so efficient on Nexus One? Fast CPU + fast > > flash? Which one is more important? Or both? > > > > > > There is nothing so special about the Nexus One in this regard. �It is > > the newer Qualcomm with actually relatively slow internal flash. > > > > An alternative question would be what is making your board so slow. :} > > �You might want to do some CPU and storage tests on it to see if there > > is an issue there. > > > > And note that my numbers for the myTouch -- which I would consider to be > > pretty much low-end Android hardware for these things -- are better than > > your numbers. �Maybe for package scanning that could be explained by you > > having a lot more .apks pre-installed on your device... �but with you > > taking over 2x as long to do class preloading, I think you have a > > problem somewhere. > > Dianne, > > Thanks very much. This is helpful. > > You don't happen to have a bootchart for the myTouch lying around > do you? If not, no bother. But if you have one and could share it, > it would be helpful to compare with what I'm getting on an OMAP > EVM board. > > I presume you-all get bootcharts as a standard part of your > builds and testing, since you built it into 'init'. > > For others looking at boot time issues, I put some > instructions for using it on Android, as well as a > bootchart from the ADP1, here: > http://elinux.org/Using_Bootchart_on_Android > > IMHO, it would be useful, if people have measurements from other > devices or platforms, if we could collect more and post them there. > > Thanks, > -- Tim > > P.S. Lest I hear cries of hypocrisy, I'll try to get one > for an OMAP EVM running eclair up on the site Real Soon Now... :-) > > > ============================= > Tim Bird > Architecture Group Chair, CE Linux Forum > Senior Staff Engineer, Sony Network Entertainment > ============================= > > -- Dianne Hackborn Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. -- unsubscribe: [email protected] website: http://groups.google.com/group/android-porting
