[Mageia-dev] make -l ?

Mon Sep 3 01:18:41 CEST 2012

On Sun, Sep 2, 2012 at 5:14 PM, Jose Jorge <lists.jjorge at free.fr> wrote:
+> Le 31/08/2012 11:40, Pascal Terjan a écrit :
+>
+>> Currently %make is expanded to make -j<nb cpu>
+>>
+>> I'd like it to be replaced with make -l<nb cpu>
+>>
+>>
+> Some activities, like USB transfers are seen as huge system load (I often
+> get more than 4 on a monocpu system, while is CPU is idle to compile. So I
+> think we may end with a side effect that build time will be longer....
+
+Currently I see the following cases:
+- 1 big job with parallel makefile (like kernel), it will probably run
+more builds in parallel as building 24 .o does not cause a load of 24
+- 2 big jobs with parallel makefile, it will probably reduce things as
+currently each of them run 24 builds in parallel, leading to a load of
+about 40, now the load will be 24
+- 1 big job and a small one: I am not sure there will be much change
+- 1 or 2 small jobs: no change
+
+And yes the load is not only the cpu, but that's a good thing. If we
+have 40 processes trashing the disk it's better to not start more even
+if we have 20 cpu idling
+
+But yes it needs to be tested
+