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Mark Knecht wrote: |
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> Hi, |
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> Is there a portage option that will limit the number of cores used |
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> by emerge? For instance, in a chroot on a 12 core machine I want to |
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> limit emerge to not using more than 3 cores? |
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> |
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> If possible, I'd also like to limit the total disk bandwidth |
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> consumption during emerge. For instance, when untarring a big file to |
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> do the emerge at times the disk consumption gets to high and the |
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> machine becomes laggy. Is there an option that addresses this? |
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> |
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> These questions are mostly about being able to update a chroot |
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> mid-day without other tasks slowing down too much. I don't care how |
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> long the chroot really takes to get a huge emerge done, but rathe just |
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> keeping the machine very responsive while it's happening. I already |
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> use: |
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> |
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> MAKEOPTS="-j3" |
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> PORTAGE_NICENESS="15" |
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> |
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> which helps (I think) but it doesn't totally address either of the issues above. |
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> |
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> Thanks, |
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> Mark |
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> |
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> |
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|
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This may help: |
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|
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PORTAGE_IONICE_COMMAND="ionice -c -3 -p \${PID}" |
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|
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Make sure you have util-linux installed since it has the ionice |
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command. I think you have to have it enabled in the kernel as well. |
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I'm not certain tho. |
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|
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On my machine, even if I tell emerge to only do one job at a time, it |
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still staggers around the cores. I guess it makes the CPU heat spread |
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out evenly or something. |
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|
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Hope that helps. |
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|
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Dale |
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|
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:-) :-) |
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