Date: Mon, 19 Oct 1998 15:08:56 -0700 (PDT) From: Bill Paul <wpaul@FreeBSD.ORG> To: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: cvs commit: src/sys/pci if_xl.c if_xlreg.h Message-ID: <199810192208.PAA07920@freefall.freebsd.org>
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wpaul 1998/10/19 15:08:56 PDT Modified files: sys/pci if_xl.c if_xlreg.h Log: Modify the transmit packet queuing strategy a bit to be a little less agressive. With the old code, if a descriptor chain was already on its way to the chip, xl_start() would try to splice new chains onto the end of the current chain by stopping the transmitter, modifying the tail pointer of the current chain to point to the head of the new chain, then restart the transmitter. The manual says you're allowed to do this and it works, but I'm not too keen on it anymore. The new code waits until the eixsting chain has been sent and then queues the next waiting chain in the 'transmit ok' handler. Performance still looks good one way or the other. Revision Changes Path 1.14 +21 -19 src/sys/pci/if_xl.c 1.7 +2 -1 src/sys/pci/if_xlreg.h To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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