I really don't know what you are trying to get at. As I said, as far as I know browser CPU use is generally pretty single-threaded -- the DOM rendering and JavaScript interpreter all need to run in the same thread. Just creating more threads doesn't magically allow this work to be spread across them.
And again, Gingerbread was not written for multi-core CPUs. In fact if you try to run stock GB on a multi-core CPU you will be extremely unstable because there are many things not working correctly for SMP, especially ARM SMP. So it doesn't make sense to ask questions about how stock GB runs on multi-core, because it just doesn't. If you are wondering about a particular phone someone has released with GB, you will need to talk with that manufacturer, because they will have needed to do some work to have GB run on a multi-core CPU. On Wed, Aug 31, 2011 at 2:09 PM, Jack Harvard <jack.harv...@gmail.com>wrote: > Thanks for your reply, Dianne. If I run the Android browser as my only > application in Gingerbread on a quad-core smartphone, and the page to be > loaded is stored locally in memory (no network delay etc, in this case, the > browser is single-threaded only as no network connection?), I wouldn't see > any performance scaling (or worse, as the OS may move the threads to another > core less busy in a circle) from a single-core smartphone, everything else > being the same? > > On 31 Aug 2011, at 21:00, Dianne Hackborn wrote: > > > Gingerbread isn't designed for multi-core CPUs. The browser doesn't try > to create threads to use multiple CPUs, it creates threads to have multiple > network connections. > > > > Besides networking, browsers are pretty intrinsically single-threaded > anyway. The complicated stuff all needs to run in one thread: DOM > rendering, JavaScript, etc. > > > > On Wed, Aug 31, 2011 at 12:08 PM, Jack Harvard <jack.harv...@gmail.com> > wrote: > > I want to understand how many threads Gingerbread generates in order to > understand how the browser performance scale with multicores? For example, > if "a few " means 2, that means 4 cores wouldn't scale the browser > performance by anywhere close to 4 times. I understand that Gingerbread > doesn't officially support SMP, sometimes browser does crash on multicore > platforms, it's not a problem for me though. > > > > On 31 Aug 2011, at 18:57, Dianne Hackborn wrote: > > > > > Oh and Gingerbread wasn't designed to run on anything but single CPU > systems, so that's irrelevant to the question of the base platform. Of > course people shipping Android modify it in various ways, and the browser is > often one of the things they modify. > > > > > > On Wed, Aug 31, 2011 at 10:57 AM, Dianne Hackborn <hack...@android.com> > wrote: > > > A few. Why? :) > > > > > > > > > On Wed, Aug 31, 2011 at 10:40 AM, Jack Harvard <jack.harv...@gmail.com> > wrote: > > > Wondering how many threads does android browser generate? Suppose it's > Gingerbread running on a dual-core or quad-core ARM processor. > > > > > > -- > > > You received this message because you are subscribed to the Google > > > Groups "Android Developers" group. > > > To post to this group, send email to > android-developers@googlegroups.com > > > To unsubscribe from this group, send email to > > > android-developers+unsubscr...@googlegroups.com > > > For more options, visit this group at > > > http://groups.google.com/group/android-developers?hl=en > > > > > > > > > > > > -- > > > Dianne Hackborn > > > Android framework engineer > > > hack...@android.com > > > > > > 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. > > > > > > > > > > > > > > > -- > > > Dianne Hackborn > > > Android framework engineer > > > hack...@android.com > > > > > > 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. > > > > > > > > > -- > > > You received this message because you are subscribed to the Google > > > Groups "Android Developers" group. > > > To post to this group, send email to > android-developers@googlegroups.com > > > To unsubscribe from this group, send email to > > > android-developers+unsubscr...@googlegroups.com > > > For more options, visit this group at > > > http://groups.google.com/group/android-developers?hl=en > > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to android-developers@googlegroups.com > > To unsubscribe from this group, send email to > > android-developers+unsubscr...@googlegroups.com > > For more options, visit this group at > > http://groups.google.com/group/android-developers?hl=en > > > > > > > > -- > > Dianne Hackborn > > Android framework engineer > > hack...@android.com > > > > 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. > > > > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to android-developers@googlegroups.com > > To unsubscribe from this group, send email to > > android-developers+unsubscr...@googlegroups.com > > For more options, visit this group at > > http://groups.google.com/group/android-developers?hl=en > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to android-developers@googlegroups.com > To unsubscribe from this group, send email to > android-developers+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- Dianne Hackborn Android framework engineer hack...@android.com 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. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
