Messages in this thread | | | Date | Mon, 24 May 2004 15:02:30 -0400 | From | Scott Robert Ladd <> | Subject | NUMA Questions |
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I'm running a Tyan K8W 2885, with two Opteron 240s and 512MB in each memory bank. I've compiled kernel 2.6.7-rc1 with the following in my config:
CONFIG_K8_NUMA=y CONFIG_DISCONTIGMEM=y CONFIG_NUMA=y
In /var/log/messages, I see:
May 24 14:45:11 Corwin Scanning NUMA topology in Northbridge 24 May 24 14:45:11 Corwin Number of nodes 2 (10010) May 24 14:45:11 Corwin Node 0 MemBase 0000000000000000 Limit 000000001fffffff May 24 14:45:11 Corwin Node 1 MemBase 0000000020000000 Limit 000000003fff0000 May 24 14:45:11 Corwin Using node hash shift of 24 May 24 14:45:11 Corwin Bootmem setup node 0 0000000000000000-000000001fffffff May 24 14:45:11 Corwin Bootmem setup node 1 0000000020000000-000000003fff0000 May 24 14:45:11 Corwin ACPI: have wakeup address 0x10020005000 May 24 14:45:11 Corwin No mptable found. May 24 14:45:11 Corwin No mptable found. May 24 14:45:11 Corwin setting up node 0 0-1ffff May 24 14:45:11 Corwin On node 0 totalpages: 131071 May 24 14:45:11 Corwin DMA zone: 4096 pages, LIFO batch:1 May 24 14:45:11 Corwin Normal zone: 126975 pages, LIFO batch:16 May 24 14:45:11 Corwin HighMem zone: 0 pages, LIFO batch:1 May 24 14:45:11 Corwin setting up node 1 20000-3fff0 May 24 14:45:11 Corwin On node 1 totalpages: 131056 May 24 14:45:11 Corwin DMA zone: 0 pages, LIFO batch:1 May 24 14:45:11 Corwin Normal zone: 131056 pages, LIFO batch:16 May 24 14:45:11 Corwin HighMem zone: 0 pages, LIFO batch:1
So am I correct in assuming that NUMA is up and running? I note that Andi's numastat displays:
node1 node0 numa_hit 304539 472556 numa_miss 0 0 numa_foreign 0 0 interleave_hit 0 0 local_node 303607 472549 other_node 932 7
Yet when I run Andi's numactl, it states:
Corwin /usr/src/numactl-0.6.3 # numactl --show No NUMA support available on this system.
A quick test program, and I see:
numa_available() returns -1 numa_max_node() return 1
Can anyone shed light on this?
-- Scott Robert Ladd Coyote Gulch Productions (http://www.coyotegulch.com) Software Invention for High-Performance Computing
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