Messages in this thread | | | Subject | Re:Re: SiI3112 DMA | From | juan.carlos@vivo ... | Date | Tue, 7 Oct 2003 11:25:37 -0200 |
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Will we see a patch for 2.4.22-23 too? (Nudge nudge wink wink)
If this information is of any use for you, I was playing with a SiI 3112 yesterday (Abit mobo, Athlon XP2500 1800 MHz, Seagate 120MB 7200 RPM SATA drive) and noticed that, while with 2.4.22-ac4 I had a hdparm -t result of 16 MB/sec, with 2.4.23-pre6 I got 25 MB/sec -- which is still less than the 32-33 MB/sec I get with normal ATA. Does that make any sense?
> It is an issue with first generation FIS transfer on the wire. > > Take the size of the request in sectors and divide by 15 or 7.5K. Standard FIS packet size is 8K. > > Without going into much detail because of NDA's, there needs to be a special DMA engine build table. > > I did it once then lost the code because of lack of sleep.
Juan Carlos Castro y Castro VIVO - Diretoria de Processos de Negócio - Projetos Tel.: 55 (21) 2574-3506 - Cel.: 55 (21) 9603-7440 juan.carlos@vivo.com.br jcastro@vialink.com.br
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