Local, Near & Far Memory - Help needed with data from a Power 730,740 & 750
nagger 100000MRSJ Visits (13906)
I need you to help me settle an argument or rather lack of information.
I am getting conflicting messages about whether these smaller Power7 machines use Local and Near or Local and Far memory.
I documented what I thought was correct in the Part 1 of this series of blog's.
Actually, there is not much difference as these machines have two tiers of memory like "on the chip" or "some where else" so the names are hardly vital but I would like my facts stra
If you do and you have a Virtual Machine (LPAR) that uses both Power 7 chips, I would really like a small sample of mpstat -d output.
Check you are using both Power7 chips with: lssrad -av
and you will see two SRAD's in the list numbered 0 and 1.
If the VM has more then 8 CPUs then obviously it has to be using both but smaller VM's may also be across chips.
Then collect when the machine is running some work (i.e. not totally idle as a column of zeros proves nothing): mpstat -d 1 3 >/tmp/mpstat.txt
I am hoping you will have some percentages in one of the end two columns, so either S4hrd (near) or S5hrd (far).
The Power 710, 720, 730 and 740 are fundamentally the same machine but the Power750 is quite different and may have a different architecture, so stats from both classes of machine please.
I would also like the output from:
So I can clearly see the machine, firmware, AIX level and LPAR details etc for the machine involved.
Then add the output file to a Comment section below or email to nag at uk dot ibm dot com and subject: SRAD data.
Many many thanks in advance, Nigel Griffiths
OK First Result:
And a second result: