lkml.org 
[lkml]   [2004]   [Jul]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [RFC] Lock free fd lookup
    * Ravikiran G Thirumalai (kiran@in.ibm.com) wrote:
    > This makes use of the lockfree refcounting infrastructure (see earlier
    > posting today) to make files_struct.fd[] lookup lockfree. This is carrying
    > forward work done by Maneesh and Dipankar earlier.
    >
    > With the lockfree fd lookup patch, tiobench performance increases by 13%
    > for sequential reads, 21 % for random reads on a 4 processor pIII xeon.

    I'm curious, how much of the performance improvement is from RCU usage
    vs. making the basic syncronization primitive aware of a reader and
    writer distinction? Do you have benchmark for simply moving to rwlock_t?

    thanks,
    -chris
    --
    Linux Security Modules http://lsm.immunix.org http://lsm.bkbits.net
    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 14:04    [W:0.024 / U:0.724 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site