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    SubjectRe: [PATCH 0/21]: powerpc/cell spidernet bugfixes, etc.
    Date
    On Tuesday 10 October 2006 22:49, Linas Vepstas wrote:
    > Andrew, please apply/forward upstream.
    >
    > The following set of 21 patches (!) are all aimed at the the
    > spidernet ethernet device driver. The spidernet is an etherenet
    > controller built into the Toshiba southbridge for the PowerPC Cell
    > processor. (This is the only device in existance that with this
    > ethernet hardware in it).
    >
    > These patches re-package/re-order/re-cleanup a previous
    > set of patches I've previously mailed. Thus, some have
    > been previously Acked-by lines, most do not. Most of
    > these patches are tiny, and handle problems that cropped
    > up during testing. Sorry about there being so many of them.
    >
    > The first set of 12 patches fix a large variety of mostly
    > minor bugs.
    >
    > The important patches are 13 through 17: these overcome a
    > debilitating performance problem on transmit (6 megabits
    > per second !!) on transmit of patches 500 bytes or larger.
    > After applying these, I am able to get the following:
    >
    > pkt sz   speed (100K buffs)       speed (4M buffs)
    > ------   -----------------        ----------------
    > 1500     700 Mbits/sec            951 Mbits/sec
    > 1000     658 Mbits/sec            770
    > 800      600                      648
    > 500      500                      500
    > 300      372                      372
    > 60        70                       70
    >
    > Above buf size refers to /proc/sys/net/core/wmem_default

    Excellent work! I guess this the best tx performance we've
    seen so far on this hardware.

    Consider this as an Acked-by: for all the patches, I'll save
    the effort of replying to each one of them separately.

    Jeff, do you plan on merging these fixes for 2.6.19?

    Arnd <><
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