Date: Wed, 02 Jun 2010 16:10:15 -0700 From: Xin LI <delphij@delphij.net> To: freebsd-net@freebsd.org Subject: Re: A slight change to tcpip_fillheaders... Message-ID: <4C06E4D7.5020301@delphij.net> In-Reply-To: <0BC7AD09-B627-4F6A-AD93-B7E794A78CA2@freebsd.org> References: <0BC7AD09-B627-4F6A-AD93-B7E794A78CA2@freebsd.org>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 2010/06/02 15:09, George Neville-Neil wrote: > Howdy, > > A while back another src developer mentioned that he had gotten better performance by changing > tcpip_fillheaders() in the following way: [...] > I have tried this change with NetPIPE (NPtcp -b 100000) on a pair of machines using Intel igb devices and found > that it provides no improvement, but I am wondering if other people want to try this and > see if it improves throughput at all. I was testing this on a Nehalem class machine, not sure if it > might help on other architectures. I'd for this change if it doesn't cause performance regression :) Cheers, - -- Xin LI <delphij@delphij.net> http://www.delphij.net/ FreeBSD - The Power to Serve! Live free or die -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.14 (FreeBSD) iQEcBAEBCAAGBQJMBuTXAAoJEATO+BI/yjfBj20H/iET4oZ6HrLpVcOea05yHfEd JdWdRXT8Ti4IVKhRN+6VsKWpQ0RxLEzi51YShQ/zNpqwDTF9hWiTMxKZh//90EyW GRxOPNKI94R/mo1uEDBIpPNZBvxn1cUy9Y+Q+A+P5kY6DK7L2+LVYRTk3UxO+gM4 jXUloDQQwg52o+nmgjE332ucMM2+r5ikDazoagDGsn6uIlSj0vhEsBxKtcU46M2w lLcdSVXs5hw9cX52o1JvNlyAejCHWKnp45PFqrPMCA+4TR2+Mr+kVgjjjoY4/aTz 38XyUxF3e921zh5kgdFrf8Fox8Aac+mpc9UYEoDQ/TU7TnUY5Rsz10SfZl2WPRo= =/aoI -----END PGP SIGNATURE-----
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