Hi,
I am trying to allocate memory in my NUMA-compatible AMD opteron
machine using the numa_alloc_onnode. I am getting a Memory not
available error (errno 12). But the nodes have far more memory that
what is being allocated.
I am trying to allocate a simple structure
typedef struct
{
int N;
int nz;
float *value; /* scalar values */
int *index; /* offsets */
} sparseVector;
using a for loop like this:
for(long int i=0; i<100000000; i++)
{
ret = alloc_onnode(sizeof(sparseVector) ,0, "niceee");
if(ret == NULL)
{
fprintf (stderr, "Error during memory allocation.
ErrNo:%d - %s\n Memory allocated %ld ",errno, strerror(errno),
i*1000000);
exit(0);
}
}
I am always getting an error once I allocate 1572264 bytes of memory.
But the machine has 60 GB of ram and so each node roughly has 20 gb of
ram. This should be more than enough for allocating the memory that I
need. Also if I substitute the alloc_onnode with malloc, it allocates
memory without any problems.
Please let me know what could be the cause of this problem.. Is there
any kind of linux parameters that are limiting the total memory that
can be allocated??
I have been battling with this for a month now. So please spare me
some time and give me some suggestions if you can.
Ajay.
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