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Full Discussion: malloc gives the same memory to two different nodes. How to deal with it?
Top Forums Programming malloc gives the same memory to two different nodes. How to deal with it? Post 302272945 by cdbug on Friday 2nd of January 2009 12:45:28 AM
Old 01-02-2009
malloc gives the same memory to two different nodes. How to deal with it?
When allocating memory for two different nodes, the resulting memory are the same. Clearly, this will lead to a mistake. This happened in a function. And the process must be in a function.

(gdb) p tree->list[9]
$43 = (node *) 0x8be4180
(gdb) p tree->list[10]
$44 = (node *) 0x8be4180


At the beginning, it is correct. list[0] to list[8] is allocated properly. But it can not work well in list[9]
Last edited by cdbug; 01-02-2009 at 02:37 AM..
 

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LEARN ABOUT PHP

numastat

NUMACTL(8)						   Linux Administrator's Manual 						NUMACTL(8)

NAME

       numastat - Print statistics about NUMA memory allocation

SYNOPSIS

       numastat

DESCRIPTION

       numastat  displays  NUMA  allocations  statistics from the kernel memory allocator.  Each process has NUMA policies that specifies on which
       node pages are allocated. See set_mempolicy(2) or numactl(8) on details of the available policies.  The numastat  counters  keep  track	on
       what nodes memory is finally allocated.

       The counters are separated for each node. Each count event is the allocation of a page of memory.

       numa_hit is the number of allocations where an allocation was intended for that node and succeeded there.

       numa_miss shows how often an allocation was intended for this node, but ended up on another node due to low memory.

       numa_foreign  is  the  number of allocations that were intended for another node, but ended up on this node.  Each numa_foreign event has a
       numa_miss on another node.

       interleave_hit is the number of interleave policy allocations that were intended for a specific node and succeeded there.

       local_node is incremented when a process running on the node allocated memory on the same node.

       other_node is incremented when a process running on another node allocated memory on that node.

SEE ALSO

       numactl(8) set_mempolicy(2) numa(3)

NOTES

       numastat output is only available on NUMA systems.

       numastat assumes the output terminal has a width of 80 characters and tries to format the output accordingly.

EXAMPLES

       watch -n1 numastat
       watch -n1 --differences=accumulative numastat

FILES

       /sys/devices/system/node/node*/numastat

BUGS

       The output formatting on machines with a large number of nodes could be improved.

SuSE Labs							     Nov 2004								NUMACTL(8)
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