MTQ

[TM1NB]

Hi together,

I've a short question about how to figure out the max possible MTQ value for the TM1s.cfg.
The servers hardware is the following:

Prozessor Intel(R) Xeon(R) CPU E5-2667 v2 @ 3.30GHz, 3300 MHz, 8 Kern(e), 16 logische(r) Prozessor(en)
Prozessor Intel(R) Xeon(R) CPU E5-2667 v2 @ 3.30GHz, 3300 MHz, 8 Kern(e), 16 logische(r) Prozessor(en)

So my question is, is my MTQ limit 16 because 2*8 cores or is ist 32 because of the 2*16 logical processors?
And what happens when the MTQ parameter in the .cfg is bigger than the server hardware allows?

Thanks

[lotsaram]

You can use
MTQ=ALL
or
MTQ=-1
... to utilise all processors

Or if you want to be conservative and always leave 1 processor free for the OS to do other stuff
MTQ=-2
... to utilise all available processors less one

Unless you have a hulking monster server with 96 or more processors then I would always use this for MTQ versus setting a hardcoded number.

And for completeness to DISABLE MTQ
MTQ=1
or
MTQ=0
... (which explains the seemingly illogical -1 for "ALL")

[TM1NB]

Hi lotsaram,

thanks for your reply. Yes, I know the possibilities how to config the MTQ parameter. My question is more about the specs for the Intel(R) Xeon(R) CPU I posted. I'm not sure about the definition what MTQ can use here as parameter. The 16 cores or the 32 logical processors?

Thanks

[Emixam]

Hello,

Based on IBM website,

MTQ=n where n represents the number of threads to be used for a single operation.

And by definition,

The number of threads you have depends on the number of cores in your CPU. Each CPU core can have two threads. So a processor with two cores will have four threads. A processor with eight cores will have 16 threads.

You can also have a quick look at your Processor CPU Specifications on Intel website.



And now, to answer your questions,

So my question is, is my MTQ limit 16 because 2*8 cores or is ist 32 because of the 2*16 logical processors?

16 if you have 8 cores, 32 if you have 16 cores

And what happens when the MTQ parameter in the .cfg is bigger than the server hardware allows?

I have no idea.. be safe, don't try !

Have a good day

[TM1NB]

Hi again,

so this seems to be the important part here:

The number of threads you have depends on the number of cores in your CPU. Each CPU core can have two threads. So a processor with two cores will have four threads. A processor with eight cores will have 16 threads.

-> My max MTQ limit is 32, because each core (2 x 8) can handle 2 threads.

Thanks @ all