processor

How can I know in a C program, on which physical processor and core my code is running? I'm using Linux and gcc 4.4.3. You may check /proc//stat file system, according to http://www.kernel.org/doc/Documentation/filesystems/proc.txt , you should just check task_cpu flag. As example without correct types and error checking: struct pstat { int pid; //process id char tcomm[256];//filename of the executable char state[2]; //state (R is running, S is sleeping, D is sleeping in an //uninterruptible wait, Z is zombie, T is traced or stopped) int ppid;// process id of the parent process int pgrp;//

I've enabled the django request processor TEMPLATE_PROCESSORS = ( "django.core.context_processors.auth", "django.core.context_processors.debug", "django.core.context_processors.i18n", "django.core.context_processors.media", "django.core.context_processors.request", ) Still i don't have to request variable available in templates. I've to manually pass it. Using django 1.0.2 Everywhere on web it seems it's only about enabled request processor.. Also i am using RequestContext as : return render_to_response( 'profile.html', { 'persons':Person.objects.all(), 'person':Person.objects.get(id=id),

I am new to programming and come from a non-CS background (no formal degree). I mostly program winforms using C#. I am confused about 32 bit and 64 bit.... I mean, have heard about 32 bit OS, 32 bit processor and based on which a program can have maximum memory. How it affects the speed of a program. There are lot more questions which keep coming to mind. I tried to go through some Computer Organization and Architecture books. But, either I am too dumb to understand what is written in there or the writers assume that the reader has some CS background. Can someone explain me these things in a

I understand that the processor brings data into the cache via cache lines, which - for instance, on my Atom processor - brings in about 64 bytes at a time, whatever the size of the actual data being read. My question is: Imagine that you need to read one byte from memory, which 64 bytes will be brought into the cache? The two possibilities I can see is that, either the 64 bytes start at the closest 64 bytes boundary below the byte of interest, or the 64 bytes are spread around the byte in some predetermined way (for instance, half under, half above, or all above). Which is it? Eugene Smith If

I have a very large XML file which I need to transform into another XML file, and I would like to do this with XSLT. I am more interested in optimisation for memory, rather than optimisation for speed (though, speed would be good too!). Which Java-based XSLT processor would you recommmend for this task? Would you recommend any other way of doing it (non-XSLT?, non-Java?), and if so, why? The XML files in questions are very large, but not very deep - with millions of rows (elements), but only about 3 levels deep. Dimitre Novatchev At present there are only three XSLT 2.0 processors known and

Is there an API to get the number of CPUs available in Linux? I mean, without using /proc/cpuinfo or any other sys-node file... I've found this implementation using sched.h: int GetCPUCount() { cpu_set_t cs; CPU_ZERO(&cs); sched_getaffinity(0, sizeof(cs), &cs); int count = 0; for (int i = 0; i < 8; i++) { if (CPU_ISSET(i, &cs)) count++; } return count; } But, isn't there anything more higher level using common libraries? Владимир Николайчук #include <stdio.h> #include <sys/sysinfo.h> int main(int argc, char *argv[]) { printf("This system has %d processors configured and " "%d processors