On 2009-Mar-29 11:55:48 -0700, Ondrej Certik wrote:
>I think I will just add more targets to the makefile in the top
>directory, e.g. something like
>
>make # use 1 processor
>make parallel # use all processors
>JOBS=3 make # use 3 processors
FWIW, FreeBSD has just implemented something simila
On Mar 29, 12:49 am, Ondrej Certik wrote:
> I just tried the following code on several linuxes (Debian, Ubuntu,
> Gentoo, Red Hat, OpenSUSE) and on OS X 10.5 Intel and it seems to just
> work everywhere:
>
> #include "unistd.h"
> #include "stdio.h"
>
> int main()
> {
> int ncpus;
> ncpus
On Sun, Mar 29, 2009 at 11:34 AM, Peter Jeremy
wrote:
> On 2009-Mar-28 14:53:46 -0700, Ondrej Certik wrote:
>>I am trying to figure out the best way to automatically determine the
>>number of processors and used that information to speed up Sage build.
>
> Note that this should be able to be ove
On Sun, Mar 29, 2009 at 11:34 AM, Peter Jeremy
wrote:
> On 2009-Mar-28 14:53:46 -0700, Ondrej Certik wrote:
>>I am trying to figure out the best way to automatically determine the
>>number of processors and used that information to speed up Sage build.
>
> Note that this should be able to be ove
On 2009-Mar-28 14:53:46 -0700, Ondrej Certik wrote:
>I am trying to figure out the best way to automatically determine the
>number of processors and used that information to speed up Sage build.
Note that this should be able to be over-ridden by the operator -
just because a system has (say) 8 co
Hi Elliott,
On Sat, Mar 28, 2009 at 3:59 PM, Elliott wrote:
>
> If the user has Java installed, you could execute a .class file to get
> this information; for example:
>
> public class NumProcessors {
> public static void main(String[] args) {
> System.out.println(Runtime.getRuntime().availa
Hi Roman,
On Sat, Mar 28, 2009 at 4:40 PM, Roman Pearce wrote:
>
> /* Linux */
> #include
> int sched_getaffinity(pid_t pid, unsigned int cpusetsize, cpu_set_t
> *mask);
>
> static inline int num_processors()
> {
> unsigned int bit;
> int np;
> cpu_set_t aff;
> memse
/* Linux */
#include
int sched_getaffinity(pid_t pid, unsigned int cpusetsize, cpu_set_t
*mask);
static inline int num_processors()
{
unsigned int bit;
int np;
cpu_set_t aff;
memset(&aff, 0, sizeof(aff) );
sched_getaffinity(0, sizeof(aff), &aff );
If the user has Java installed, you could execute a .class file to get
this information; for example:
public class NumProcessors {
public static void main(String[] args) {
System.out.println(Runtime.getRuntime().availableProcessors());
}
}
If you compiled this and put the resulting .clas
> 3) if it doesn't build, we are on Mac probably, so run sysctl -n
> hw.ncpu (I don't have any Mac to test it on, but I guess there
> might be a way to actually write the C program in a portable way to
> work both on linux and Mac)
So according to this thread:
http://www.nabble.com/-patch--l
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