On Wednesday, 29 November 2023 14:12:39 GMT John Blinka wrote: > On Mon, Nov 27, 2023 at 10:39 AM Peter Humphreey <pe...@prh.myzen.co.uk> > wrote:l > > > What am I missing? > > I have much less powerful hardware than you but libreoffice (as a > stand-alone build) generates many more threads than 4 on my “cluster”. I’m > also using distcc. > > On the main box, I set > MAKEOPTS=“-j17 -l6” > On the other two less powerful ones -l is 5 and 3, but -j is the same. > > On the main box, /etc/distcc/hosts contains > localhost/11 sophie/5,lzo tobey/3,lzo —localslots=11 —localslots_cpp=11 > > On sophie and tobey (my less powerful boxes) the hosts file contains > something similar but specific to those boxes. The localslots and > localslots_cpp numbers are 3 on tobey and 5 on sophie, and the order in > which the machines are mentioned changes (local machine first, then remote > machines in order of power). > > This configuration is the result of a lot of experimentation rather than > just a theoretical calculation. The various guides that discuss how to tune > these numbers for best performance were modestly helpful in explaining what > the tuning parameters mean, but experimenting and watching the resulting > performance was the best teacher. > > Hope this helps. > > John Blinka
I don't use distcc, so I can't add anything useful to its application on Peter's requirements, but a quick test by Peter would be to start a single emerge of libreoffice on its own and observe if it is still limited to 4 threads with and without distcc.
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