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| author | Nitin Gupta <nitin.m.gupta@oracle.com> | 2015-11-02 16:30:24 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-11-04 12:14:49 -0800 |
| commit | 52708d690b8be132ba9d294464625dbbdb9fa5df (patch) | |
| tree | 264d16be6ed5415b3457ba9aafbe796ad395669c /arch/sparc/include | |
| parent | cae9af6a820b47d3e5e0da4edf23cf6fa69b18d8 (diff) | |
| download | linux-stable-52708d690b8be132ba9d294464625dbbdb9fa5df.tar.gz linux-stable-52708d690b8be132ba9d294464625dbbdb9fa5df.tar.bz2 linux-stable-52708d690b8be132ba9d294464625dbbdb9fa5df.zip | |
sparc64: Fix numa distance values
Orabug: 21896119
Use machine descriptor (MD) to get node latency
values instead of just using default values.
Testing:
On an T5-8 system with:
- total nodes = 8
- self latencies = 0x26d18
- latency to other nodes = 0x3a598
=> latency ratio = ~1.5
output of numactl --hardware
- before fix:
node distances:
node 0 1 2 3 4 5 6 7
0: 10 20 20 20 20 20 20 20
1: 20 10 20 20 20 20 20 20
2: 20 20 10 20 20 20 20 20
3: 20 20 20 10 20 20 20 20
4: 20 20 20 20 10 20 20 20
5: 20 20 20 20 20 10 20 20
6: 20 20 20 20 20 20 10 20
7: 20 20 20 20 20 20 20 10
- after fix:
node distances:
node 0 1 2 3 4 5 6 7
0: 10 15 15 15 15 15 15 15
1: 15 10 15 15 15 15 15 15
2: 15 15 10 15 15 15 15 15
3: 15 15 15 10 15 15 15 15
4: 15 15 15 15 10 15 15 15
5: 15 15 15 15 15 10 15 15
6: 15 15 15 15 15 15 10 15
7: 15 15 15 15 15 15 15 10
Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com>
Reviewed-by: Chris Hyser <chris.hyser@oracle.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/include')
| -rw-r--r-- | arch/sparc/include/asm/topology_64.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/topology_64.h b/arch/sparc/include/asm/topology_64.h index 01d17046225a..bec481aaca16 100644 --- a/arch/sparc/include/asm/topology_64.h +++ b/arch/sparc/include/asm/topology_64.h @@ -31,6 +31,9 @@ static inline int pcibus_to_node(struct pci_bus *pbus) cpu_all_mask : \ cpumask_of_node(pcibus_to_node(bus))) +int __node_distance(int, int); +#define node_distance(a, b) __node_distance(a, b) + #else /* CONFIG_NUMA */ #include <asm-generic/topology.h> |