Date: Sat, 6 Oct 2001 14:44:18 -0600 From: "Kenneth D. Merry" <ken@kdm.org> To: Terry Lambert <tlambert2@mindspring.com> Cc: current@FreeBSD.ORG Subject: Re: KRIS: FOR YOU TO COMMIT: soft interrupt coelescing Message-ID: <20011006144418.A6779@panzer.kdm.org> In-Reply-To: <3BBF5E49.65AF9D8E@mindspring.com>; from tlambert2@mindspring.com on Sat, Oct 06, 2001 at 12:40:57PM -0700 References: <3BBF5E49.65AF9D8E@mindspring.com>
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On Sat, Oct 06, 2001 at 12:40:57 -0700, Terry Lambert wrote: > Here are patches to three of the Gigabit ethernet drivers to > implement soft interrupt coelescing. I have included patches > for the dc, ti, and vr drivers... the ti driver is by far the > cleanest. > > I don't use Bill Paul's Tigon III driver, so I haven't > included patche for it (the patches should be obvious, > anyway, from these). > > This does in software what the firmware interrupt coelescing > that Bill Paul put in the Tigon II and Tigon III drivers > does, namely, process more packets per interrupt than would > otherwise be processed, and thus reduce interrupt overhead. [ I don't particularly want to get involved in this thread...but... ] Can you explain why the ti(4) driver needs a coalescing patch? It already has in-firmware coalescing paramters that are tuneable by the user. It also already processes all outstanding BDs in ti_rxeof() and ti_txeof(). It isn't terribly clear what you're doing in the patch, since it isn't a context diff. You also never gave any details behind your statement last week: "Because at the time the Tigon II was released, the jumbogram wire format had not solidified. Therefore cards built during that time used different wire data for the jumbogram framing." I asked, in response: "Can you give more details? Did someone decide on a different ethertype than 0x8870 or something? That's really the only thing that's different between a standard ethernet frame and a jumbo frame. (other than the size)" Ken -- Kenneth Merry ken@kdm.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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