Date: Sun, 27 Aug 2006 19:11:43 -0500 From: "Rick C. Petty" <rick-freebsd@kiwi-computer.com> To: "Jin Guojun \[VFFS\]" <j_guojun@lbl.gov> Cc: freebsd-performance@freebsd.org, hardware@freebsd.org Subject: Re: reduce interrupt rate for CD/DVD drive(r) Message-ID: <20060828001143.GB27678@megan.kiwi-computer.com> In-Reply-To: <44F22CB9.9040100@lbl.gov> References: <44F22CB9.9040100@lbl.gov>
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On Sun, Aug 27, 2006 at 04:37:29PM -0700, Jin Guojun [VFFS] wrote: > I have difficulty to get CD/DVD write speed above 1.6MB/s (10x for CD, > or 1.1x for DVD). > The problem seems to be the interrupt rate is high (70-80% of CPU) for > CD/DVD drive(r). What's the value of the "hw.ata.atapi_dma" sysctl? -- Rick C. Petty
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