[android-developers] Re: .9 SDK Questions
An emulator that accurately models the performance of real hardware will not be able to run in realtime on any machine sitting on someone's desk. That is not true. It can be done for a cell phone. You need about 10x to do it. I would hope most people desktops are in that range. Oddly that was a common quote about emulating some hardware in the 80's, but that hardware was akin to PC performance. And this still ignores things like graphics hardware acceleration (which can have a huge impact since it can do things like relieve the CPU of basically all work in compositing the screen whenever it changes), DSPs, etc. Well to my knowledge the first two phones don't have PowerVRs. So the emulation would probably be the OMAP or ARM processors with only some graphics acceleration. Not that is matters. I was looking for estimated performance not exact like the WTK does for J2ME. --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] Announcing the new Android 0.9 SDK beta! http://android-developers.blogspot.com/2008/08/announcing-beta-release-of-android-sdk.html For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: .9 SDK Questions
Edit: Not that it matters. I was looking for estimated performance like the WTK does for J2ME and not exact performance. --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] Announcing the new Android 0.9 SDK beta! http://android-developers.blogspot.com/2008/08/announcing-beta-release-of-android-sdk.html For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: .9 SDK Questions
On Aug 20, 9:16 pm, tberthel [EMAIL PROTECTED] wrote: 1. The emulator to run on a system much faster than the real device. 2. Instrumentation to control timing. An emulator that accurately models the performance of real hardware will not be able to run in realtime on any machine sitting on someone's desk. And this still ignores things like graphics hardware acceleration (which can have a huge impact since it can do things like relieve the CPU of basically all work in compositing the screen whenever it changes), DSPs, etc. --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] Announcing the new Android 0.9 SDK beta! http://android-developers.blogspot.com/2008/08/announcing-beta-release-of-android-sdk.html For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: .9 SDK Questions
It's hard to make such statements about a certain PC emulating a certain level of phone. There are a lot more factors at play than pure CPU clock speed when determining end user performance. Things like the memory bus speed, the speed of flash, cache sizes, cache replacement algorithms, adjustable clock rates, etc. Many of those factors are not emulated, so it's not really possible to make comparisons from the emulator to any given non-emulated hardware. -Jeff On Wed, Aug 20, 2008 at 1:50 AM, hanni [EMAIL PROTECTED] wrote: I think what people are looking for is some rough estimate to the correlation between the speed of the emulator and the speed of the phone. Such as, a 1 GHz CPU in the emulator would roughly equal a 100 MHz CPU in the phone, for most loops or calculations. (Just an example, i don't know.) On 20 Aug, 06:58, Justin (Google Employee) [EMAIL PROTECTED] wrote: Could someone give us the PC hardware of something that is running it the same speed as the real phone? There is no the phone. Android is designed to run on a variety of hardware and we expect it will run on many hardware configurations. Therefore the statement running it the same speed as the real phone doesn't make sense. Cheers, Justin Android Team @ Google On Aug 19, 8:40 pm, tberthel [EMAIL PROTECTED] wrote: Could someone give us the PC hardware of something that is running it the same speed as the real phone? When will the PC not determine the performance as much? I assume they could provide a sleep timer to provide semi accurate performance to a phone with a profile until instrumentation is added for performance control? WTK uses some kind of instrumentation to do this. On Aug 19, 9:44 pm, hackbod [EMAIL PROTECTED] wrote: On Aug 19, 6:54 pm, tberthel [EMAIL PROTECTED] wrote: Are the first phones going to be this fast? The spend of the emulator depends entirely on the PC you are running it on, so there is no way to correlate whatever speed you see with the speed on an actual device. (And that is ignoring other aspects like there being no graphics hardware acceleration in the emulator.)- Dölj citerad text - - Visa citerad text - --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] Announcing the new Android 0.9 SDK beta! http://android-developers.blogspot.com/2008/08/announcing-beta-release-of-android-sdk.html For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: .9 SDK Questions
I was obviously referring to the first phone I.E. the T-Mobile phone coming out in Nov. On Aug 19, 11:58 pm, Justin (Google Employee) [EMAIL PROTECTED] wrote: Could someone give us the PC hardware of something that is running it the same speed as the real phone? There is no the phone. Android is designed to run on a variety of hardware and we expect it will run on many hardware configurations. Therefore the statement running it the same speed as the real phone doesn't make sense. Cheers, Justin Android Team @ Google On Aug 19, 8:40 pm, tberthel [EMAIL PROTECTED] wrote: Could someone give us the PC hardware of something that is running it the same speed as the real phone? When will the PC not determine the performance as much? I assume they could provide a sleep timer to provide semi accurate performance to a phone with a profile until instrumentation is added for performance control? WTK uses some kind of instrumentation to do this. On Aug 19, 9:44 pm, hackbod [EMAIL PROTECTED] wrote: On Aug 19, 6:54 pm, tberthel [EMAIL PROTECTED] wrote: Are the first phones going to be this fast? The spend of the emulator depends entirely on the PC you are running it on, so there is no way to correlate whatever speed you see with the speed on an actual device. (And that is ignoring other aspects like there being no graphics hardware acceleration in the emulator.) --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] Announcing the new Android 0.9 SDK beta! http://android-developers.blogspot.com/2008/08/announcing-beta-release-of-android-sdk.html For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: .9 SDK Questions
This is why performance emulation requires: 1. The emulator to run on a system much faster than the real device. 2. Instrumentation to control timing. I was just looking for a rough estimate like say a Centrino Duo 1.7 Ghz with 1 Gig. On Aug 20, 7:20 pm, Jeff Hamilton [EMAIL PROTECTED] wrote: It's hard to make such statements about a certain PC emulating a certain level of phone. There are a lot more factors at play than pure CPU clock speed when determining end user performance. Things like the memory bus speed, the speed of flash, cache sizes, cache replacement algorithms, adjustable clock rates, etc. Many of those factors are not emulated, so it's not really possible to make comparisons from the emulator to any given non-emulated hardware. -Jeff On Wed, Aug 20, 2008 at 1:50 AM, hanni [EMAIL PROTECTED] wrote: I think what people are looking for is some rough estimate to the correlation between the speed of the emulator and the speed of the phone. Such as, a 1 GHz CPU in the emulator would roughly equal a 100 MHz CPU in the phone, for most loops or calculations. (Just an example, i don't know.) On 20 Aug, 06:58, Justin (Google Employee) [EMAIL PROTECTED] wrote: Could someone give us the PC hardware of something that is running it the same speed as the real phone? There is no the phone. Android is designed to run on a variety of hardware and we expect it will run on many hardware configurations. Therefore the statement running it the same speed as the real phone doesn't make sense. Cheers, Justin Android Team @ Google On Aug 19, 8:40 pm, tberthel [EMAIL PROTECTED] wrote: Could someone give us the PC hardware of something that is running it the same speed as the real phone? When will the PC not determine the performance as much? I assume they could provide a sleep timer to provide semi accurate performance to a phone with a profile until instrumentation is added for performance control? WTK uses some kind of instrumentation to do this. On Aug 19, 9:44 pm, hackbod [EMAIL PROTECTED] wrote: On Aug 19, 6:54 pm, tberthel [EMAIL PROTECTED] wrote: Are the first phones going to be this fast? The spend of the emulator depends entirely on the PC you are running it on, so there is no way to correlate whatever speed you see with the speed on an actual device. (And that is ignoring other aspects like there being no graphics hardware acceleration in the emulator.)- Dölj citerad text - - Visa citerad text - --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] Announcing the new Android 0.9 SDK beta! http://android-developers.blogspot.com/2008/08/announcing-beta-release-of-android-sdk.html For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: .9 SDK Questions
On Aug 19, 6:54 pm, tberthel [EMAIL PROTECTED] wrote: Are the first phones going to be this fast? The spend of the emulator depends entirely on the PC you are running it on, so there is no way to correlate whatever speed you see with the speed on an actual device. (And that is ignoring other aspects like there being no graphics hardware acceleration in the emulator.) --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] Announcing the new Android 0.9 SDK beta! http://android-developers.blogspot.com/2008/08/announcing-beta-release-of-android-sdk.html For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: .9 SDK Questions
Could someone give us the PC hardware of something that is running it the same speed as the real phone? When will the PC not determine the performance as much? I assume they could provide a sleep timer to provide semi accurate performance to a phone with a profile until instrumentation is added for performance control? WTK uses some kind of instrumentation to do this. On Aug 19, 9:44 pm, hackbod [EMAIL PROTECTED] wrote: On Aug 19, 6:54 pm, tberthel [EMAIL PROTECTED] wrote: Are the first phones going to be this fast? The spend of the emulator depends entirely on the PC you are running it on, so there is no way to correlate whatever speed you see with the speed on an actual device. (And that is ignoring other aspects like there being no graphics hardware acceleration in the emulator.) --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] Announcing the new Android 0.9 SDK beta! http://android-developers.blogspot.com/2008/08/announcing-beta-release-of-android-sdk.html For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
