Re: GA144 Instruction Timing

From	rickman <gnuarm@gmail.com>
Newsgroups	comp.lang.forth
Subject	Re: GA144 Instruction Timing
Date	2012-08-22 10:33 -0400
Organization	A noiseless patient Spider
Message-ID	<k12qjd$nca$1@dont-email.me> (permalink)
References	<k06nr6$9bh$1@dont-email.me> <5be4d8ed-5de5-41c6-adca-2c1d49a23158@googlegroups.com>

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On 8/22/2012 10:11 AM, RR wrote:
> I see Mr Moore has been updating his blog. Here is a direct link to some timing results.
>
> http://colorforth.com/timings.htm
>
> code ns
> unext 2.3

This is a pretty meaningless value if you are trying to time code in a 
real application.  What was the voltage and temperature of the chip? 
Was this chip representative for process variation or was it faster or 
slower than the typical value?

Normally chip makers fully characterize their chips and provide software 
based tools to allow the users to measure timing performance.  GA has 
done a minimal job of this so that you need to instead test your app on 
the eval hardware and use a scope to measure the performance after 
calibrating the hardware against their test suite and statistical data.

Or better yet, don't work on any apps that push the performance of the 
chips.

Rick

Thread

GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-11 18:54 -0400
  Re: GA144 Instruction Timing Paul Rubin <no.email@nospam.invalid> - 2012-08-11 17:40 -0700
    Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-12 19:00 -0400
      Re: GA144 Instruction Timing johnmdrake@gmail.com - 2012-08-14 10:17 -0700
        Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-15 18:57 -0400
  Re: GA144 Instruction Timing RR <freedomspyder@gmail.com> - 2012-08-22 07:11 -0700
    Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-22 10:33 -0400
      Re: GA144 Instruction Timing RR <freedomspyder@gmail.com> - 2012-08-22 12:46 -0700
        Re: GA144 Instruction Timing Jason Damisch <jasondamisch@yahoo.com> - 2012-08-22 13:10 -0700
          Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-22 18:10 -0400
          Re: GA144 Instruction Timing Paul Rubin <no.email@nospam.invalid> - 2012-08-23 00:03 -0700
            Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-23 19:57 -0400
              Re: GA144 Instruction Timing Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-24 16:29 +0200
                Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-27 18:33 -0400
                Re: GA144 Instruction Timing Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-28 02:45 +0200
                Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-27 21:41 -0400
                Re: GA144 Instruction Timing Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-28 22:07 +0200
                Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-28 18:25 -0400
                Re: GA144 Instruction Timing Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-29 01:41 +0200
                Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-29 16:43 -0400
                Re: GA144 Instruction Timing Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-30 02:13 +0200
                Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-30 15:07 -0400
                Re: GA144 Instruction Timing Bernd Paysan <bernd.paysan@gmx.de> - 2012-08-30 23:11 +0200
                Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-09-01 15:15 -0400
        Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-08-22 18:05 -0400
          Re: GA144 Instruction Timing RR <freedomspyder@gmail.com> - 2012-08-22 15:46 -0700
  Re: GA144 Instruction Timing rickman <gnuarm@gmail.com> - 2012-09-02 17:21 -0400

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