lkml.org 
[lkml]   [2005]   [Jun]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: increased translation cache footprint in v2.6
    Marcelo Tosatti <marcelo.tosatti@cyclades.com> wrote:
    >
    > As can be seen the number of entries is more than twice (dominated by kernel addresses).

    But doesn't this:

    I-TLB userspace misses: 142369 I-TLB userspace misses: 2179 ITLB u: 139190
    I-TLB kernel misses: 118288 I-TLB kernel misses: 1369 ITLB k: 116319
    D-TLB userspace misses: 222916 D-TLB userspace misses: 180249 DTLB u: 38667
    D-TLB kernel misses: 207773 D-TLB kernel misses: 167236 DTLB k: 38273

    mean that we're mainly missing on data accesses?

    > Sorry, I've got no list of functions for these addresses, but it was pretty obvious at the time
    > looking at the sys_read() codepath and respective virtual addresses.
    >
    > Manual reorganization of the functions sounded too messy, although BenL mentions something about
    > fget_light() can and should be optimized.

    The workload you're using also does write(), and the write() paths got
    significantly deeper.

    Stack misses, perhaps. But a tlb entry caches the translation for a single
    page, yes?
    -
    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: 2005-06-27 01:55    [W:0.020 / U:63.436 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site