Date: Mon, 18 Nov 2002 23:56:08 +0300 (MSK) From: maxes@peterlink.ru To: stable@FreeBSD.ORG Subject: Re: DEVICE_POLLING and kern.hz Message-ID: <Pine.BSI.4.40.0211182350420.10812-100000@buratino.peterlink.ru> In-Reply-To: <20021118233000.J43289-100000@woozle.rinet.ru>
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> root@gw-f:~# ifconfig fxp1 link0 > fxp1: Microcode loaded, int_delay: 1000 usec bundle_max: 0 > root@gw-f:~# ifconfig fxp2 link0 > fxp2: Microcode loaded, int_delay: 1000 usec bundle_max: 0 > > But -- Does not seem to reduce either interrupt count (and possibly it should > not :) or interrupt percentage level... > > Maybe I should also say that all of them are in promiscuous mode due to > arpwatches... Hi. Check this (may be obsolete) document: http://www.tel.fer.hr/zec/BSD/fxp/ hw.fxp.int_delay Valid Range: 0-10000 (0=off) Default Value: 1000 This parameter holds the number of time units (in microseconds) until the adapter generates an interrupt in case the bundle is not full. The recommended value is 1000 for end-nodes, and 500 for packet forwarding applications. hw.fxp.bundle_max Valid Range: 1-16 Default Value: 6 This parameter holds the maximum number of packets in a bundle. Reasonable values range from 2 to 10. On chipset revisions older than D101-MA, the parameter has no effect (no limit on bundle size will be imposed). hw.fxp.size_mask Valid Range: 0x1-0xFFFF (0xFFFF=off) Default Value: 0xFF80 This parameter is a bit-mask describing the minimum size frame that will be bundled. The default masks the lower 7 bits, which means that any frame less than 128 bytes in length will not be bundled, but will instead immediately generate an interrupt. Any frame that is 128 bytes or larger will be bundled normally. This feature is meant to provide immediate indication of ACK frames in a TCP environment. On chipset revisions older than D101-S, this parameter has no effect. What show "sysctl -a | grep fxp" ? p.s. DEVICE_POLLING not support in SMP, do You know this ? b.r. Kozin Maxim To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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