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From: Vinod KK <kkvinod@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: CONFIG_PREEMPT_SOFTIRQS
Date: Tue, 31 Jan 2006 20:19:47 +0530	[thread overview]
Message-ID: <c2f233c10601310649j6b104787m5a2287d3e022a911@mail.gmail.com> (raw)

Hi,

I am using linux 2.6.10 (with Ingo Molnars real time patches) on my mips board.

When I try running high network traffic (10% traffic on a 100Mbps
link) on my target board with the CONFIG_PREEMPT_DESKTOP=y and
CONFIG_PREEMPT_SOFTIRQS=y options enabled I notice that the console
freezes and recovers only after the traffic stops. I do not notice
this behaviour with the CONFIG_PREEMPT_SOFTIRQS option disabled.

I understand that the CONFIG_PREEMPT_SOFTIRQS option puts all softirq
processing to the ksoftirqd daemon, but i do not see why this should
stall the console. I believe there should be some task which is
starving for CPU, but I do not know which one.

The console is on an 16550 serial port.

Could someone please give me some pointers on where I should start looking?

Thanks,
Vinod K.

             reply	other threads:[~2006-01-31 14:49 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-01-31 14:49 Vinod KK [this message]
2006-01-31 18:10 ` CONFIG_PREEMPT_SOFTIRQS Steven Rostedt

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