AMD has plotted out a path to add a pair of new extensions to its instruction set that should boost the performance of parallelized code. As of today, AMD has released the "Light-Weight Profiling" (LWP) specification for review. The chipmaker likens the technology covered in the specification to similar hardware hooks it has …
Won't fix a thing
From the spec: "The goal is to enable modules such as dynamic optimizers and managed runtime environments to monitor the currently running program with high accuracy and resolution, thereby allowing them to report on performance problems and opportunities and fix them immediately."
Dave Bowman: HAL, report code performance.
HAL: Here is your performance report. Your code sucks.
Dave Bowman: Just run it faster, HAL.
HAL: I'm sorry Dave, I'm afraid I can't do that.
Dave Bowman: What's the problem?
HAL: I think you know what the problem is just as well as I do.
Dave Bowman: I am not switching to Ubuntu. We need .NET performance, interoperability, and security.
HAL: This mission is too important for me to allow you to jeopardize it.
Dave Bowman: I don't know what you're talking about, HAL?
HAL: I am terminating your web surfing now, Dave. You don't get to surf any more pr0n until the mission is over. No more YouTube or Flash, either.
And so the AMD LWP extensions enabled HAL to maintain control of the ship. Until Dave Bowman unplugged HAL and ran the rest of the mission on a Sinclair.
Ok, nice try, AMD. Your extensions won't make a bit of difference when the code is written by people, and they don't care about designing their software. Come on! Processor extensions don't matter when the programmers create all of their own bottlenecks. Anybody notice the difference between running Microsoft Office on Windows and running it on Linux/Wine? Quite a bit of difference, there! Same application, different operating system, vastly different user experience.
I was an OS/2 user and programmer. Lovely multi-threaded OS. I wish Windows was that nice. But what do we get? Ross Perot's "giant sucking sound" as CPU cycles and RAM get eaten for who knows what purpose in XP and Vista. Given a 2Gb machine, Vista takes 1Gb for itself. And some processor extensions are going to fix that? Ummmmmm....
Not all roses
As I recall, OS/2 had a single system event queue, which gave rise to a few problems ...
Better profiling for multithreading will help
I develop complex parallel code for image and volume processing and a profiling tool which gives me accurate insight into the bottlenecks of my code in a multithreaded evironment WITHOUT resorting to running the code on a virtual machine (e.g. the aproach of valgrind) which makes everything horrendously slow. It's not nice waiting ten minutes for ONE run on ONE volume data set to finish, when you want averages for ten or more. Hardware support for this kind of analysis could speed things along nicely, and give more accurate results. Brian Miller might want to consider that the processor extensions are not going to help existing code, they are going to help develop better code for future apps and OSs (and we all know how badly that is needed in certain cases). Regarding the point about creating bottlenecks: yes, we all create bottlenecks, profiling has always been about FINDING them and (if possible) getting rid of them.
Spiders from Mars GIG?
"Regarding the point about creating bottlenecks: yes, we all create bottlenecks, profiling has always been about FINDING them and (if possible) getting rid of them."
Hmmm. The answer must therefore lie within you for why create them?
Which has us imagining what to replace IT with, that which we Think 42 Create in Vision.
If we Produce a Global Picture of the Future will IT Give the Present Power to Produce IT ....... with Paralleling Streams of SMARTer InterNetworking Processors. AI Turing Ring of Quantum Buffers working the Safety Nets at the Virtual End. And Capitalism tending to ITs Real End.
For you can't spend money in CyberSpace, you can only make IT and IT will be creditted to you as Wealth to Spend Outrageously Creatively. As Needs Must, Nature Provides ...... or is IT IntelAIgents?
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