topic doubt reg SLM and ILM in Operating System - HP-UX

doubt reg SLM and ILM

satheeshnp — Sat, 05 Feb 2011 15:10:14 GMT

currently i have undergone SD2 Admin training.
When allocating memory during the time of Vpar creation, i came across the terms ILM and SLM(Socket Level Memory).

I want simple explanation about these terms and how these impact .

Re: question regarding SLM and ILM

Dennis Handly — Sun, 18 Sep 2011 22:04:58 GMT

ILM Interleaved Memory is the memory from multiple blades.
SLM (Socket Level Memory) is local to the current socket. Which I assume is similar to the current Cell Local Memory from previous Superdomes.

The latter is closer to the CPU/core so has a faster access. The former is needed because you may need a total memory size from multiple blades.
SD2 QuickSpecs:
http://h18000.www1.hp.com/products/quickspecs/13682_div/13682_div.PDF
parcreate(1M):
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02261558/c02261558.pdf

Re: doubt reg SLM and ILM

satheeshnp — Sat, 05 Feb 2011 17:53:12 GMT

Thanks for ur time for giving explanation

Re: doubt reg SLM and ILM

Manix — Thu, 29 Sep 2011 21:04:07 GMT

Cell Local Memory (CLM) is memory where each cacheline comes from the same cell. Hence accesses to a cacheline are local to that cell.

Interleaved Memory (ILM) is when the firmware provides physical memory which is addressable by CPUs as contiguous memory

Must read the link below.

http://h30499.www3.hp.com/t5/System-Administration/Detailed-Info-about-ILM-CLM-npar-vpar/m-p/4358803#M345836