Re: Poor UDP performance using 2.6.21-rc5-rt5

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To: Nivedita Singhvi <niv@...>
Cc: Dave Sperry <dave_sperry@...>, <linux-rt-users@...>, <linux-kernel@...>, netdev <netdev@...>
Date: Monday, April 2, 2007 - 1:55 am

* Nivedita Singhvi <niv@us.ibm.com> wrote:


in general (except of course those netdev folks that are interested in 
-rt+networking performance matters) i'd suggest we analyze this in an 
-rt specific way - netdev shouldnt have to bother about this.


one thing to check would be whether both kernels use the same 
clocksource, via:

 cat /sys/devices/system/clocksource/clocksource0/current_clocksource

but at first sight there's no clocksource related overhead in the 
oprofile.

	Ingo
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Messages in current thread:
Poor UDP performance using 2.6.21-rc5-rt5, Dave Sperry, (Sun Apr 1, 3:15 pm)
Re: Poor UDP performance using 2.6.21-rc5-rt5, Ingo Molnar, (Mon Apr 2, 3:21 am)
Re: Poor UDP performance using 2.6.21-rc5-rt5, Dave Sperry, (Mon Apr 2, 4:17 am)
Re: Poor UDP performance using 2.6.21-rc5-rt5, Ingo Molnar, (Mon Apr 2, 5:37 am)
Re: Poor UDP performance using 2.6.21-rc5-rt5, Nivedita Singhvi, (Sun Apr 1, 4:07 pm)
Re: Poor UDP performance using 2.6.21-rc5-rt5, Ingo Molnar, (Mon Apr 2, 1:55 am)
Re: Poor UDP performance using 2.6.21-rc5-rt5, Ingo Molnar, (Mon Apr 2, 2:30 am)
Re: Poor UDP performance using 2.6.21-rc5-rt5, Dave Sperry, (Sun Apr 1, 6:00 pm)