Messages in this thread | | | From | Juergen Beisert <> | Date | Thu, 20 Dec 2007 14:18:16 +0100 | Subject | Re: [patch 3/3] Enable setting of IRQ-thread priorities from kernel cmdline. (repost:CC to LKML) |
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On Thursday 20 December 2007 13:45, Jaswinder Singh wrote: > On 12/20/07, Remy Bohmer <linux@bohmer.net> wrote: > > So, Is this a serious requirement? Should this be possible? > > I have noticed this problem: > root@192.168.1.253:~# cat /proc/loadavgrt > 1.00 1.00 1.00 0/52 1158 > root@192.168.1.253:~# cat /proc/loadavg > 0.00 0.00 0.02 1/52 1159 > root@192.168.1.253:~# > > So I am curious, if possible, user can switch softirq-threads or IRQs > RT tasks to non-RT tasks for slow hardware or least important hardware > for NON-RT tasks. So this will improve RT behaviour. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Why?
IMHO: Simply decrease the RT priority of less important IRQs or increase all other more important IRQs. IRQs are always more important than other processes in a system, also in non RT systems.
Juergen -- Dipl.-Ing. Juergen Beisert | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry Handelsregister: Amtsgericht Hildesheim, HRA 2686 Vertretung Sued/Muenchen, Germany Phone: +49-8766-939 228 | Fax: +49-5121-206917-9 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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