* Riku Voipio <[EMAIL PROTECTED]> [2007-09-24 23:48]: > Did you enable the dma engine in kernel config? There is three patches > that could help:
I'm glad your email caused me to double check. While the dma engine itself was enabled, some other options were missing. With the following options enabled, my performance goes to: Timing cached reads: 382 MB in 2.01 seconds = 190.16 MB/sec Timing buffered disk reads: 144 MB in 3.03 seconds = 47.59 MB/sec CONFIG_DMA_ENGINE=y CONFIG_DMA_COPY_CLEAR_PAGE=y CONFIG_DMA_COPY_CLEAR_PAGE=y CONFIG_POLLED_DMA_COPY_USER=y CONFIG_INTEL_IOP_ADMA=y I'll ask Dan Williams of Intel about the status of these patches. If we're really lucky, maybe they'll be in the kernel that will be used for the "etch+0.5" update (i.e. a new 2.6.2x based kernel for etch). If not, we can make a n2100 repository somewhere with a kernel that has the dma engine patches. -- Martin Michlmayr http://www.cyrius.com/ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
