Dynamic MAKEOPTS with emerge --jobs

[Dennis Nedry]

Greetings to all.

I'm just wondering... Is there any way to have a dynamic MAKEOPTS when emerging with --jobs (parallel emerge)?

Basically, I'm on a 8-core machine (2x QC). I find that it is often faster to compile things with MAKEOPTS at -j2 and emerge --jobs 8, which usually pegs the machine at near 100% utilization. Since it's emerging 8 things at once, the time it takes for things to configure prior to make is significantly reduced (I find that configure takes up a good portion of emerge time).

So MAKEOPTS="-j2" and emerge --jobs 8 fully utilizes the machine wonderfully.

The thing is, sometimes emerge --jobs 8 eventually gets to a bridge where ~40 or 50 things need to be emerged, but they all depend on a specific package being present first- so the box will land up compiling one package with MAKEOPTS="-j2", which isn't very efficient.

Is there any way to have emerge dynamically set MAKEOPTS depending on the number of parallel emerges taking place? I would imagine it would be something like a --maxmakeopts=16 emerge arg or something. When combined with --jobs, emerge would automatically divide maxmakeopts/jobs (assuming it's >=1), which would yield your final MAKEOPTS value for said builds (ie, with maxmakeopts at 16, and 4 jobs, each job would be assigned a MAKEOPTS of -j4... With maxmakeopts at 16 and one job, then that job would be assigned MAKEOPTS of -j16).

Does a feature like this exist? Have I missed it somewhere?

-DN

[poly_poly-man]

If I were you, I'd ignore the emerge --jobs part, and just do makeopts with -j and the load average limiter.
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[d2_racing]

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