Date: Wed, 21 Sep 2011 11:05:09 +0200 (CEST) From: Elof Ofel <elof2@sentor.se> To: freebsd-questions@freebsd.org Subject: Run different kernel subsystems with different priorities Message-ID: <alpine.BSF.2.00.1109211043340.3711@deliverator.sentor.se>
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Hi! Q1: Is it possible to set different NICE priorities on different kernel subsystems? For example, can I prioritize the interrupt handling of the NIC bge1 ([irq23: bge1]) over the interrupt handling of NIC bge0 ([irq22: bge0])? ...and can I make the usb subsystem ([usb0], [usb1], [usb2], [usb3]) less prioritized than pretty much everything else? When running 'ps faxuwl', I see that all processess on my system is running with NICE value 0. Q2: When assigning custom NICE priotities to my userland processes, what levels should one use? Is there any recommendation to follow? If I intend to have three levels, high, medium and unimportant, should I use the values 0 10 20 or 0 1 2 or 0 50 100 or -1 0 1 or -1 5 10 or something different? /Elof
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