lkml.org 
[lkml]   [2020]   [Nov]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Subject[PATCH for-next 0/2] optimise sbitmap deferred clear
    Date
    In short, sbitmap_deferred_clear() lights up pretty much in my profiler,
    so these optimisations gave me ~1% more t-put. All the heavy stuff is in
    [2/2]. Would love someones eye to check it.

    I also want to replace cmpxchg() in that function with a single
    atomic and, that's slightly lighter and also transfers it from
    lock-free to wait-free, that's pretty neat.
    The problem is that apparently there is a non-atomic_t atomic and,
    and atomic_t is unsigned int but all the bitmap do unsigned long.
    Advice is welcome.

    Pavel Begunkov (2):
    sbitmap: optimise sbitmap_deferred_clear()
    sbitmap: remove swap_lock

    include/linux/sbitmap.h | 5 -----
    lib/sbitmap.c | 21 +++++++--------------
    2 files changed, 7 insertions(+), 19 deletions(-)

    --
    2.24.0

    \
     
     \ /
      Last update: 2020-11-21 01:06    [W:3.847 / U:0.664 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site