topic Re: NUMA tuning in rx6600 which has 11.31 in Operating System - HP-UX

NUMA tuning in rx6600 which has 11.31

Manikrajan — Mon, 23 Feb 2009 02:42:26 GMT

Is it possible to tune NUMA in rx6600 which HPUX 11iv3?I hope NUMA tuning is possible only in cell based server.

Re: NUMA tuning in rx6600 which has 11.31

Steven E. Protter — Mon, 23 Feb 2009 03:02:56 GMT

Shalom,

On demand webcaset on NUMA tuning:
http://h20338.www2.hp.com/hpux11i/cache/535988-0-0-0-121.html

Other links:
http://www.csee.umbc.edu/help/architecture/idfhp-uxlab.pdf

http://www.pearsonhighered.com/educator/academic/product/0,3110,0131463969,00.html

SEP

Re: NUMA tuning in rx6600 which has 11.31

Duncan Edmonstone — Mon, 23 Feb 2009 07:08:09 GMT

No.

The rx6600 is *not* a NUMA system. It is a UMA system.

Only the cell-based systems (rx7640, rx8640 and Superdome) are non-uniform memory access capable. (and even then only in multi-cell partitions).

To see if a given system is NUMA or not, run:

mpsched -s

If the locality domain count is > 1, your system is NUMA.

NUMA will likely become much more important when systems based on Tukwila are released with on-board memeory controllers. This will mean every multi-socket system is a NUMA system (like all AMD64-based systems are right now, although most folks choose not to take advantage of that).

HTH

Duncan