Date: Thu, 20 Nov 2003 11:50:40 -0800 From: Avleen Vig <lists-freebsd@silverwraith.com> To: Don Bowman <don@sandvine.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Device polling, with SMP? Message-ID: <20031120195040.GH33548@silverwraith.com> In-Reply-To: <FE045D4D9F7AED4CBFF1B3B813C85337035E3E73@mail.sandvine.com> References: <FE045D4D9F7AED4CBFF1B3B813C85337035E3E73@mail.sandvine.com>
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On Thu, Nov 20, 2003 at 12:58:58PM -0500, Don Bowman wrote: > > I read Luigi's paper at info.iet.unipi.it/~luigi/polling/ which at the > > end implies that DEVICE_POLLING on an SMP box might not make > > sense - but > > right now for me it would make sense as both CPU's are locked: > > One tries to handle interrupts > > The other tries to manage the application > > > > I could try forcing DEVICE_POLLING to compile as is suggested in that > > URL but I wanted to see if anyone had tried this before. > > The interface is an FXP. > > We use it on em. I just commented out the #error line that > says you can't do it. > device polling in idle doesn't work, and the user/system time > calculation isn't correct, but it works well otherwise. This is pretty much what I wanted to confirm thanks! In which way is the system/user time incorrect? Always, or only under high load? what about it is incorrect? My skills are limited but I might take a stab at fixing that. -- Avleen Vig Systems Administrator Personal: www.silverwraith.com EFnet: irc.mindspring.com (Earthlink user access only)
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