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Subject: Re: [hwloc-devel] [hwloc-announce] Hardware locality (hwloc) v1.1rc1 released
From: Samuel Thibault (samuel.thibault_at_[hidden])
Date: 2010-11-10 20:31:58


Jirka Hladky, le Thu 11 Nov 2010 02:04:57 +0100, a écrit :
> printf("max_os_index %u\n",max_os_index);
>
> linuxmask = malloc(max_os_index/HWLOC_BITS_PER_LONG * sizeof(long));
> if (!linuxmask) {
> errno = ENOMEM;
> goto out;
> }
>
> err = get_mempolicy(&linuxpolicy, linuxmask, max_os_index, 0, 0);
> if (err < 0) {
> perror("get_mempolicy");
> goto out_with_mask;
> }
> ==========================================================================
>
> On system with 2 NUMA nodes:
> $ utils/hwloc-bind --get --membind
> max_os_index 1
> max_os_index 1
> max_os_index 64
> get_mempolicy: Invalid argument
> hwloc_get_membind failed (errno 22 Invalid argument)

Could you try to increase the value of max_os_index?

I can see in the kernel source code the following in sys_get_mempolicy:

        if (nmask != NULL && maxnode < MAX_NUMNODES)
                return -EINVAL;

and MAX_NUMNODES depends on .config ...

Samuel