New Event on Home Laptop

[kingliveson]

[...]
Is this running on 2 different hardware, or single with 2 cores per engine?

One laptop, with CPU having 2 cores and 4 hardware threads. Each engine gets two hardware threads.

Not a good idea in my view to run ponder-on games on the same hardware. If it were say a quad-core and each engine is running single core, or hexa-core with each engine using dual-cores, then it should be fine.

[brinan]

Not a good idea in my view to run ponder-on games on the same hardware. If it were say a quad-core and each engine is running single core, or hexa-core with each engine using dual-cores, then it should be fine.

Each engine gets a single core, each core having two hardware threads.

Are you saying an engine needs two cores because two hardware threads are insufficient?

Regards.

[kingliveson]

Not a good idea in my view to run ponder-on games on the same hardware. If it were say a quad-core and each engine is running single core, or hexa-core with each engine using dual-cores, then it should be fine.

Each engine gets a single core, each core having two hardware threads.

Are you saying an engine needs two cores because two hardware threads are insufficient?

Regards.

You have 2 physical cores. See this thread: http://www.open-chess.org/viewtopic.php?f=4&t=791

[brinan]

[...] See this thread: http://www.open-chess.org/viewtopic.php?f=4&t=791

I do, now, see a potential problem with Ponder on, but only because of Intel® Smart Cache (ISM).

Without ISM, an engine limited to one core would not be able to spill over into the second core's cache.

Potential problem would still exist even if processor had four cores, with each engine limited to one. ISM would continue to treat every core's cache as part of one memory pool.

So, with ISM and during pondering, a program could engineer additional cache needs with the aim of reducing the pool down to a level detrimental to its opponent.

However, will continue with Ponder on. Shall assume pondering does not create, deliberately or otherwise, excessive core-cache demands. Calculating in opponent's time is a capability I want to witness.

Thanks for the link.

[brinan]

Ratings updated after 84 games added. Now 840 in total, each with a time control of 90 minutes each side. Principal variation included in game output. 7-Zip file can be downloaded (compressed, but still 5.6MB). Know sample size is small.

Engines with less than 30 games shown separately.