DEVICE_POLLING with SMP

[Vlad Galu]

veedee at c7.campus.utcluj.ro writes:

|On Wed, Jan 28, 2004 at 01:25:13PM -0600, Kevin Day wrote:
|> 
|> Has anyone made any headway with getting polling(4) to work with a
|SMP > kernel?  Last May this was discussed on here briefly with me,
|Luigi and > Don Bowman, which seemed to indicate that the majority of
|what needed > to be fixed to make this work would be some kind of
|locking in > idle_loop to make sure only one CPU gets into the polling
|code at once.> 
|> I've got a case where enabling SMP gives me a 20-30% performance
|boost, > or if I turn polling on I get another 10-15% boost. I'd love
|to see > what the two together could do. 
|
|I was just about to ask the same question. We've just received 2 Athlon
|MPs 2400+ and we're about to buy a gigabit Intel PRO/1000MT Dual for
|one of our servers.
|
|It would be great if SMP could be combined with polling.

	I see no reason for it. Having to switch between multiple kernel
threads to handle polling may bring too much overhead.

|-- 
|| Radu Bogdan 'veedee' Rusu
|| NetSysAdm at campus dot utcluj dot ro
|| Personal gallery at http://rbrusu.com
|| ...mirroring FreeBSD and coffee
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