Re: designing fast, streaming disk i/o with mmap: help wanted

From: Brian Swetland (swetland@be.com)
Date: Fri Mar 31 2000 - 23:34:08 EST

  • Next message: Mike Galbraith: "Re: [BUG] initrd broken in 2.3.51->99pre3"

    [Bill Huey <billh@burn.ucsd.edu>]
    >
    > > Streaming playback of movies is nothing compared to the task of
    > > multichannel recording. You have to simultaneously read/write N (with
    >
    > It was a comment about their overall technology, but if I'm easily
    > tricked by crazy amounts of read-ahead then please correct my
    > misunderstanding. (made mention of in a private mail.)

    I don't believe the extractors read incredibly large chunks. However,
    reads greater than 64K will bypass the block cache on BeOS (generally
    causing scatter-gather DMA directly to userspace memory) and BFS tends
    to be pretty good about keeping files reasonable contiguous.

    Brian 

    -- 
 Brian Swetland  | Kernel Engineer | "Home is where the dot files are."
 swetland@be.com | Be Incorporated |                       -- Keith Garner

    -
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

    This archive was generated by hypermail 2b29 : Fri Mar 31 2000 - 23:32:43 EST