Hi Amit, Thanks much for the patches. I tested them this morning. The standard tests pass on ia64 (8 nodes). The patches are included in the numactl-2.0.3-rc2.tar.gz tarball at ftp://oss.sgi.com/www/projects/libnuma/download/ Any other review and testing is welcome. -Cliff On Mon, Mar 02, 2009 at 06:35:46PM +0530, Amit K. Arora wrote: > PROBLEM: If the NUMA nodes in a system are not contiguous, numactl shows > incorrect output. Here is an example from one such system: > > ------------------------------------------------------ > # ls /sys/devices/system/node > has_cpu has_normal_memory node0 node1 node4 node5 online possible > # numactl --hardware > available: 6 nodes (0-5) > node 0 cpus: 0 1 2 3 > node 0 size: 15232 MB > node 0 free: 2265 MB > node 1 cpus: 4 5 6 7 > node 1 size: 16256 MB > node 1 free: 3108 MB > libnuma: Warning: /sys not mounted or invalid. Assuming one node: No > such file or directory > node 2 cpus: > node 2 size: <not available> > node 2 free: <not available> > node 3 cpus: > node 3 size: <not available> > node 3 free: <not available> > node 4 cpus: 8 9 10 11 > node 4 size: 16000 MB > node 4 free: 9292 MB > node 5 cpus: 12 13 14 15 > node 5 size: 16128 MB > node 5 free: 9479 MB > node distances: > node 0 1 2 3 4 5 > 0: 10 20 20 20 20 10 > 1: 20 10 20 20 0 0 > 2: 0 0 0 0 0 0 > 3: 0 0 0 0 0 0 > 4: 0 0 0 1112145 1024 2607344 > 5: 1024 2607344 1024 2607344 0 0 > ------------------------------------------------------ > > > As we see above, there are three problems with above output: > o it is showing wrong number of available nodes > Actually there are 4 nodes available, but it says "6". > o it tries to access information for non-exsistent nodes from /sys > Thus displaying a wrong warning message too > o the NUMA distances it shows above are clearly incorrect. > > Following two patches fixes these problems: > 1) numactl-handle-NUMA-dist-properly.patch > 2) numactl-ignore-nonavailable-nodes.patch > > > -- > Regards, > Amit Arora > -- > To unsubscribe from this list: send the line "unsubscribe linux-numa" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Cliff Wickman Silicon Graphics, Inc. cpw@xxxxxxx (651) 683-3824 -- To unsubscribe from this list: send the line "unsubscribe linux-numa" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
