OK - please try the other way:
#include <unistd.h>
#include <linux/sysctl.h>
int mib[2], p_ncpus;
size_t len;
mib[0] = CTL_HW;
mib[1] = HW_NCPU;
len = sizeof(p_ncpus);
sysctl(mib, 2, &p_ncpus, &len, NULL, 0);
printf("%d\n", p_ncpus);
On 21-Dec-2012 1:33 PM, Jonathan Hoser wrote:
> Hi David,
>
> thanks for the quick feedback:
> It looks as if I might have hit an issue:
>
>
> [root@hosta ~]# cat small.c
> #include <stdio.h>
> #include <unistd.h>
> int main() {
> printf("NProc_ONLN: %d\n", sysconf(_SC_NPROCESSORS_ONLN));
> printf("NProc_CONF: %d\n", sysconf(_SC_NPROCESSORS_CONF));
>
> }
> [root@host~]# gcc small.c -o smallcpus
> [root@host ~]# ./smallcpus
> NProc_ONLN: 128
> NProc_CONF: 128
>
>
> I will continue to look into the issue, maybe I can unearth something.
>
> Best
> -Jonathan
>
> On 12/21/2012 08:53 PM, David Anderson wrote:
>> Jonathan:
>> BOINC doesn't limit the # of CPUs as far as I know.
>> On Linux, the client gets the # of CPUs using:
>>
>> p_ncpus = sysconf(_SC_NPROCESSORS_ONLN);
>>
>> Can you see what this returns on your system?
>> i.e. run a program of the form
>>
>> #include <stdio.h>
>> #include <unistd.h>
>> int main() {
>> printf("%d\n", sysconf(_SC_NPROCESSORS_ONLN));
>> }
>>
>> If it shows 128, try replacing _SC_NPROCESSORS_ONLN with _SC_NPROCESSORS_CONF
>> and see what it says.
>>
>> -- David
>>
>> On 21-Dec-2012 4:38 AM, Jonathan Hoser wrote:
>>> Hi all,
>>>
>>> 7.0.29 (r25790svn) which is packaged with Fedora17 is limited to 128 CPUs
>>>
>>> I'm not sure if this is server or client bound,
>>> but why the limit?
>>> I can't use boinc as a test-tool for new servers if it doesn't max them out!
>>>
>>> Best
>>> -Jonathan
>>> _______________________________________________
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>>>
>> _______________________________________________
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>
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