Date: Thu, 30 Apr 1998 10:01:22 -0500 From: Raul Zighelboim <rzig@verio.net> To: "'scsi@freebsd.org'" <scsi@FreeBSD.ORG> Cc: "'n@nectar.com'" <n@nectar.com> Subject: DPT driver performance Message-ID: <A03CD00C69B1D01195AB00A024ECEB1684CB12@kaori.communique.net>
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Hello there; I run iozone on a DPT controler, and compared it to an ahc controler, and found: (iozone 512): READ WRITE drive cache AHC 24196998 b/s 7751774 b/s SEAGATE ST34572W system ram DPT 32262665 b/s 4165574 b/s SEAGATE ST34572WC 64mb simms on board + system ram (iozone 1024): AHC 9764063 b/s 7473976 b/s DPT 12111293 b/s 3966034 b/s Is there anything I can do to improve the DPT performance? Can I safelly turn on any of the following: dpt_pci.c:#ifdef DPT_ALLOW_MEMIO. This are my controler options: options AHC_TAGENABLE options AHC_SCBPAGING_ENABLE options AHC_ALLOW_MEMIO options DPTOPT options DPT_MEASURE_PERFORMANCE Thanks. ================================================== Raul Zighelboim rzig@verio.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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