thanks a lot to all of you for the help. Vishwas S
On Thu, Oct 3, 2013 at 8:48 PM, anish singh <anish198519851...@gmail.com>wrote: > > On Oct 3, 2013 8:28 PM, "sujan dutta" <stoned.se...@gmail.com> wrote: > > > > > > Yes you can, infact network subsystem softirq are reactive so it can run > again. > > however, reactivated softirq are not immediately process but until > kernel handles the pending softirqs because it might introduce latency in > user-space. > > And for better performance, when pending BH grows excessively then > family of kernel threads are wakes up to handle the load. > Family of threads mentioned here is called ksoftirqd. > Linux uses the ksoftirqd as the general solution to schedule softirq's to > run before next interrupt and by putting them under scheduler control. Also > this prevents consecutive softirq's from monopolizing the CPU. This also > has the effect that the priority of ksoftirq needs to be considered when > running very CPU-intensive applications and networking to get the proper > balance of softirq/user balance. Increasing ksoftirq priority to 0 > (eventually more) is reported to cure problems with low network performance > at high CPU load. > I think softirq calling itself is a problem which is delicately managed by > linux kernel developers and how to improve the code and logic is an active > field where you can contribute. > > > > > > > On 27-Sep-2013, at 4:44 PM, Vishwas Srivastava (vishsriv) < > vishs...@cisco.com> wrote: > > > >> Hi Group, > >> I am a bit unclear if, I could schedule another BH while I am > already running in a BH ? > >> For example, if I am running in a SOFT IRQ, can I schedule a tasklet > from there ?? > >> > >> Thanks, > >> Vishwas S > >> > >> > >> _______________________________________________ > >> Kernelnewbies mailing list > >> Kernelnewbies@kernelnewbies.org > >> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > > > > > > > _______________________________________________ > > Kernelnewbies mailing list > > Kernelnewbies@kernelnewbies.org > > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > > > >
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