Re: The Value of Thumb-2

2011-10-20 Thread Mans Rullgard
On 20 October 2011 23:22, Michael Hope wrote: > On Fri, Oct 21, 2011 at 11:16 AM, Mans Rullgard > wrote: >> On 20 October 2011 23:07, Michael Hope wrote: >>> On Fri, Oct 21, 2011 at 7:48 AM, James Tunnicliffe >>> wrote: This isn't exactly overflowing with up to date numbers, but... >>

Re: The Value of Thumb-2

2011-10-20 Thread Mans Rullgard
On 20 October 2011 23:22, Michael Hope wrote: > On Fri, Oct 21, 2011 at 11:16 AM, Mans Rullgard > wrote: >> On 20 October 2011 23:07, Michael Hope wrote: >>> On Fri, Oct 21, 2011 at 7:48 AM, James Tunnicliffe >>> wrote: This isn't exactly overflowing with up to date numbers, but... >>

Re: The Value of Thumb-2

2011-10-20 Thread Michael Hope
On Fri, Oct 21, 2011 at 11:16 AM, Mans Rullgard wrote: > On 20 October 2011 23:07, Michael Hope wrote: >> On Fri, Oct 21, 2011 at 7:48 AM, James Tunnicliffe >> wrote: >>> This isn't exactly overflowing with up to date numbers, but... >>> >>> http://elinux.org/images/8/8a/Experiment_with_Linux_an

Re: The Value of Thumb-2

2011-10-20 Thread Mans Rullgard
On 20 October 2011 23:07, Michael Hope wrote: > On Fri, Oct 21, 2011 at 7:48 AM, James Tunnicliffe > wrote: >> This isn't exactly overflowing with up to date numbers, but... >> >> http://elinux.org/images/8/8a/Experiment_with_Linux_and_ARM_Thumb-2_ISA.pdf >> >> Slides 14 and 15 say that across EE

Re: The Value of Thumb-2

2011-10-20 Thread Michael Hope
On Fri, Oct 21, 2011 at 7:48 AM, James Tunnicliffe wrote: > This isn't exactly overflowing with up to date numbers, but... > > http://elinux.org/images/8/8a/Experiment_with_Linux_and_ARM_Thumb-2_ISA.pdf > > Slides 14 and 15 say that across EEMBC Thumb-2 gives 98% of the > performance of ARM 32 bit

Re: The Value of Thumb-2

2011-10-20 Thread Mans Rullgard
On 20 October 2011 18:27, Christian Robottom Reis wrote: >    - Do we know how much better Thumb-2 actually is, in practice? It's >      easy for us to confirm this on Android; what do the numbers and >      feel of the system tell us? I did some tests comparing Libav built for ARM and Thumb-2.

Re: The Value of Thumb-2

2011-10-20 Thread James Tunnicliffe
This isn't exactly overflowing with up to date numbers, but... http://elinux.org/images/8/8a/Experiment_with_Linux_and_ARM_Thumb-2_ISA.pdf Slides 14 and 15 say that across EEMBC Thumb-2 gives 98% of the performance of ARM 32 bit instructions (assume performance optimised) and binaries are 26% sma

Re: The Value of Thumb-2

2011-10-20 Thread Roger Teague
Hi Kiko, These are all excellent questions and I for one would be keen to see a position on this. How would it be captured and the output published? Ta Sent from yet another ARM powered device On 20 Oct 2011, at 18:30, "Christian Robottom Reis" wrote: > Hello there, > >Coming back from

The Value of Thumb-2

2011-10-20 Thread Christian Robottom Reis
Hello there, Coming back from Asia I've been putting a lot of thought about how we can make sure we spend our engineering cycles on the work that is most valuable to the current Linaro members, and part of that means reassessing assumptions that we've carried since our foundation. The first p