Re: Fwd: [libreoffice-documentation] Multi-threading in Calc

2020-04-23 Thread Drew Jensen
Also - I read in a couple of places online that if you have OpenCL support enabled then the CPU threading stops. I can't test that to see if it is true because I can't seem to get OpenCL to work on this Linux desktop. Trying it on a Windows machine should answer that question. On Thu, Apr 23, 20

Re: Fwd: [libreoffice-documentation] Multi-threading in Calc

2020-04-23 Thread Drew Jensen
To follow up on that. Using LO 6.4 & 7.0 pre-release build on Ubuntu. Recalculating one of the OpenCL test xls files just now. Starting up with a command line MAX_CONCURRENCY=0 ./soffice Does turn the CPU threading off. Restarting with a command line MAX_CONCURRENCY=4 ./soffice Turns it back on

Re: Fwd: [libreoffice-documentation] Multi-threading in Calc

2020-04-23 Thread Drew Jensen
BTW I'm copying a paragraph from an email on a different list. "Also - if you set MAX_CONCURRENCY=16 - or somesuch (ie. twice your number of threads) - you may be able to defeat the hyper-threaded halving, and see if this workload happens to be one that does better with hyper-threading than withou

Re: Fwd: [libreoffice-documentation] Multi-threading in Calc

2020-04-23 Thread Stephen Fanning
Mike and Luboš, Many thanks for your help on this topic. Regards, Steve On Thu, 23 Apr 2020 at 11:16, Mike Kaganski wrote: > On 23.04.2020 13:12, Luboš Luňák wrote: > > On Thursday 23 of April 2020, Stephen Fanning wrote: > >> As for the processing itself, I remain unclear about how Calc al

Re: Fwd: [libreoffice-documentation] Multi-threading in Calc

2020-04-23 Thread Mike Kaganski
On 23.04.2020 13:12, Luboš Luňák wrote: > On Thursday 23 of April 2020, Stephen Fanning wrote: >> As for the processing itself, I remain unclear about how Calc allocates >> tasks to threads. Can we give the user any general advice on how he could >> structure his spreadsheet to gain the maximum per

Re: Fwd: [libreoffice-documentation] Multi-threading in Calc

2020-04-23 Thread Luboš Luňák
On Thursday 23 of April 2020, Stephen Fanning wrote: > As for the processing itself, I remain unclear about how Calc allocates > tasks to threads. Can we give the user any general advice on how he could > structure his spreadsheet to gain the maximum performance benefits from the > availability of

Re: Fwd: [libreoffice-documentation] Multi-threading in Calc

2020-04-23 Thread Stephen Fanning
Hi Luboš, Many thanks for your thoughts on the checkbox, which confirms what I expected. As for the processing itself, I remain unclear about how Calc allocates tasks to threads. Can we give the user any general advice on how he could structure his spreadsheet to gain the maximum performance bene

Re: Fwd: [libreoffice-documentation] Multi-threading in Calc

2020-04-23 Thread Luboš Luňák
On Wednesday 22 of April 2020, Olivier Hallot wrote: > Hi Developers > > Can charitable soul involved with threading in Calc spend a couple of > minutes to write an outline of what we should look to write a section on > the topic in our guide and Help? Just the outline and some pointers for > our i

Fwd: [libreoffice-documentation] Multi-threading in Calc

2020-04-22 Thread Olivier Hallot
Hi Developers Can charitable soul involved with threading in Calc spend a couple of minutes to write an outline of what we should look to write a section on the topic in our guide and Help? Just the outline and some pointers for our investigation. We think this feature is a plus, but it is not cl