On Nov 28, 2011 11:38 AM, "Michael Mol" <mike...@gmail.com> wrote: > > On Sun, Nov 27, 2011 at 7:54 PM, Pandu Poluan <pa...@poluan.info> wrote: > > > > On Nov 28, 2011 6:24 AM, "Neil Bothwick" <n...@digimed.co.uk> wrote: > >> > >> On Mon, 28 Nov 2011 00:56:17 +0700, Pandu Poluan wrote: > >> > >> > I don't know where the 'blame' lies, but I've found myself > >> > standardizing on MAKEOPTS=-j3, and PORTAGE_DEFAULT_OPTS="--jobs > >> > --load-average=<1.6*num_of_vCPU>" > >> > > >> > (Yes, no explicit number of jobs. The newer portages are smart enough to > >> > keep starting new jobs until the load number is reached) > >> > >> The problem I found with that is the ebuilds load the system lightly to > >> start with, before they enter the compile phase, to portage starts dozens > >> of parallel ebuilds, then the system gets completely bogged down when > >> they start compiling. > >> > > > > Yes, sometimes that would happen if at the beginning there are network-bound > > ebuilds all downloading their respective distfiles. The load stays low until > > they all start ./configure-ing roughly at the same time. Then all hell > > breaks loose. > > > > I successfully mitigate such "load-explosion" by doing a --fetchonly step > > first, and keeping MAKEOPTS at low -j (which, in my case, is actually > > required). > > > > Just to add more info: I use USE=graphite (with some CFLAGS, uh, > > 'enhancements') with gcc-4.5.3. IIRC, I could push MAKEOPTS up to -j5 (and > > even more, but I ran out of cores) when I was still using gcc-4.4.x and no > > USE=graphite. > > > > Won't file a bug report, though. I have a feeling that my bug report re: > > emerge failure will be marked WONTFIX thanks to the 'ricer special' CFLAGS > > As I noted, "-l" in MAKEOPTS takes care of the load explosion very nicely.
Most likely so. I am not aware of -l in MAKEOPTS before, so what I posted was my workaround to prevent load explosion. Thanks to your very useful tip, I now no longer have to worry about load explosion :-) (I still like doing pre-fetchonly-ing, though. But now for a different main reason :-) Rgds,
