Another question: I've been waiting for OpenMP support in gcc, it seems to be coming soon. In the meantime, I tried to parallelize my code by hard coding my threads using pthreads. I tested it by running several matrix-matrix multiplications "in parallel" on a multi-core CPU, and what I've got was all threads running on the same processor. Only after increasing my number of threads to a couple of dozens, I get some of them to run on the second processor. So basically, I am not getting any performance gain. I asked a number of people an they tell me "this is an old problem, basically the Linux kernel scheduler is stupid and nobody has bothered to fix it". Now, is Ingo's new scheduler fixing this? if gcc-openmp relies on the kernel scheduler, should we expect that open-mp will basically work-but-not-really-work on shared memory multi processor machines? I think this is an important issue to address, especially in an era where high-performace computing has become the driving force behind the hardware. BTW, how are otehr commercial compilers overcoming this scheduling problem?
http://scigraphica.sourceforge.net/
From the website:"SciGraphica is a scientific application for data analysis and technical graphics. It pretends to be a clone of the popular commercial (and expensive) application "Microcal Origin". It fully supplies plotting features for 2D, 3D and polar charts. The aim is to obtain a fully-featured, cross-plattform, user-friendly, self-growing scientific application. It is free and open-source, released under the GPL license."
Allow me to introduce SciGraphica
: "A scientific application for data analysis and technical graphics. It pretends to be a clone of the popular commercial application "Microcal Origin", supplying plotting features for 2D, 3D, and polar charts. It features opening several worksheets and plots to work with at the same time, fully-configurable plots using a control panel dialog, a completely WYSIWYG look and feel, and publication-quality PostScript output."
Disclaimer, I'm the main developer, and I'm working actively in the new generation that's going to work on top of a plugin system, with the ultimate goal of integrating it into Gnumeric. Latest version of gtkextra, libscigraphica, and sg1 are currently in CVS. Hope you like it!
I don't know how much a Sci-Fi fan this guy Moore is, but just a few things that I disliked:
- Adama wearing glasses. Give me a break, we built the Cylons and we need glasses! (in TNG we have blind that can see, that's sci-fi - unless we have a good excuse like the Butlerian Jihad)
- The president has cancer, same thing, please.
- Lower than light travel. C'mon! how did those spaceships get there? they took 100 years?
- The episode of Adama trapped with the Cylon. Please, you don't drop a warhead like that! Completely absurd. The following is unnecesary, boring, distracting. If you want to introduce the Cylons, you could do it in a more dramatic way. Even TNG does a better job with the Borg! And Adama kills it bearhanded! I expected the Cylons to be more intimidating.
OK, the guy wanted more realistic and deeper characters, but if you know sci-fi, you don't use these banal tools to make us empathize with them. It's true that it's 1980 on Earth, but these people are much more advanced.
Try it out! the best open-source program for scientific graphics and data analysis, featuring spreadsheets and plots in a very friendly interactive environment. Super cool under Gnome (and without Gnome as well). 2D, 3D, and polar charts with publication quality PostScript output, XML native file format, Python interface and more! You'll find it at http://scigraphica.sourceforge.net
Enjoy!
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Another question: I've been waiting for OpenMP support in gcc, it seems to be coming soon. In the meantime, I tried to parallelize my code by hard coding my threads using pthreads. I tested it by running several matrix-matrix multiplications "in parallel" on a multi-core CPU, and what I've got was all threads running on the same processor. Only after increasing my number of threads to a couple of dozens, I get some of them to run on the second processor. So basically, I am not getting any performance gain. I asked a number of people an they tell me "this is an old problem, basically the Linux kernel scheduler is stupid and nobody has bothered to fix it". Now, is Ingo's new scheduler fixing this? if gcc-openmp relies on the kernel scheduler, should we expect that open-mp will basically work-but-not-really-work on shared memory multi processor machines? I think this is an important issue to address, especially in an era where high-performace computing has become the driving force behind the hardware. BTW, how are otehr commercial compilers overcoming this scheduling problem?
http://scigraphica.sourceforge.net/
From the website:"SciGraphica is a scientific application for data analysis and technical graphics. It pretends to be a clone of the popular commercial (and expensive) application "Microcal Origin". It fully supplies plotting features for 2D, 3D and polar charts. The aim is to obtain a fully-featured, cross-plattform, user-friendly, self-growing scientific application. It is free and open-source, released under the GPL license."
Disclaimer, I'm the main developer, and I'm working actively in the new generation that's going to work on top of a plugin system, with the ultimate goal of integrating it into Gnumeric. Latest version of gtkextra, libscigraphica, and sg1 are currently in CVS. Hope you like it!
- Adama wearing glasses. Give me a break, we built the Cylons and we need glasses! (in TNG we have blind that can see, that's sci-fi - unless we have a good excuse like the Butlerian Jihad)
- The president has cancer, same thing, please.
- Lower than light travel. C'mon! how did those spaceships get there? they took 100 years?
- The episode of Adama trapped with the Cylon. Please, you don't drop a warhead like that! Completely absurd. The following is unnecesary, boring, distracting. If you want to introduce the Cylons, you could do it in a more dramatic way. Even TNG does a better job with the Borg! And Adama kills it bearhanded! I expected the Cylons to be more intimidating.
OK, the guy wanted more realistic and deeper characters, but if you know sci-fi, you don't use these banal tools to make us empathize with them. It's true that it's 1980 on Earth, but these people are much more advanced.
You MUST try Scigraphica (http://scigraphica.sourcefore.net) it is precisely what you are looking for. Enjoy.
Try it out! the best open-source program for scientific graphics and data analysis, featuring spreadsheets and plots in a very friendly interactive environment. Super cool under Gnome (and without Gnome as well). 2D, 3D, and polar charts with publication quality PostScript output, XML native file format, Python interface and more! You'll find it at http://scigraphica.sourceforge.net Enjoy!