Date: Wed, 16 Jun 2004 12:58:30 +0900 From: Pyun YongHyeon <yongari@kt-is.co.kr> To: freebsd-sparc64@freebsd.org Subject: Re: TCP/UDP cksum offload on hme(4) Message-ID: <20040616035830.GC7887@kt-is.co.kr> In-Reply-To: <20040616034520.GB7887@kt-is.co.kr> References: <20040616034520.GB7887@kt-is.co.kr>
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On Wed, Jun 16, 2004 at 12:45:20PM +0900, To freebsd-sparc64@freebsd.org wrote: > Hello All, > > I made a patch that enables cksum offloads on hme(4). Originally > the patch was made for OpenBSD due to FreeBSD's lack of FAS366 > support. Now, we had esp(4) ported by Scott, I could port the patch > from my OpenBSD patch. During simple test phase, I didn't notice > problems. > > 1. UDP TX cksum offload has an issue. The hardware doesn't flip the > cksum bits when the computed cksum is 0x0000. I have no idea this > is the reason why STP2002QFP says it supports only TCP RX/TX cksum. > (pp. 29, pp. 40, pp. 42) > > 2. The patch was tested on Ultra2(2x300MHz, FAS366). I'd like to > hear ok/nok results from PCI based sparc64 users. > The dmesg of the Ultra2 is available at: > http:///www.kr.freebsd.org/~yognari/dmesg.u2.txt > > 3. I couldn't feel performance boost from the cksum offloads but > enabling it reduced system loads considerably. > > The attached patch is for -CURRENT(2004.06.07), and is also available at: ^^^^^^^^^^^ 2004.06.14 The corrected URL is: http://www.kr.freebsd.org/~yongari/dmesg.u2.txt http://www.kr.freebsd.org/~yongari/hme.freebsd.diff -- Pyun YongHyeon <http://www.kr.freebsd.org/~yongari>;
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