On Thu, Sep 10 2009, Jens Axboe wrote: > On Thu, Sep 10 2009, Peter Zijlstra wrote: > > On Wed, 2009-09-09 at 14:20 +0200, Jens Axboe wrote: > > > > > > One thing I also noticed is that when I have logged in, I run xmodmap > > > manually to load some keymappings (I always tell myself to add this to > > > the log in scripts, but I suspend/resume this laptop for weeks at the > > > time and forget before the next boot). With the stock kernel, xmodmap > > > will halt X updates and take forever to run. With BFS, it returned > > > instantly. As I would expect. > > > > Can you provide a little more detail (I'm a xmodmap n00b), how does one > > run xmodmap and maybe provide your xmodmap config? > > Will do, let me get the notebook and strace time it on both bfs and > mainline. Here's the result of running perf stat xmodmap .xmodmap-carl on the notebook. I have attached the .xmodmap-carl file, it's pretty simple. I have also attached the output of strace -o foo -f -tt xmodmap .xmodmap-carl when run on 2.6.31-rc9. 2.6.31-rc9-bfs210 Performance counter stats for 'xmodmap .xmodmap-carl': 153.994976 task-clock-msecs # 0.990 CPUs (scaled from 99.86%) 0 context-switches # 0.000 M/sec (scaled from 99.86%) 0 CPU-migrations # 0.000 M/sec (scaled from 99.86%) 315 page-faults # 0.002 M/sec (scaled from 99.86%) cycles instructions cache-references cache-misses 0.155573406 seconds time elapsed 2.6.31-rc9 Performance counter stats for 'xmodmap .xmodmap-carl': 8.529265 task-clock-msecs # 0.001 CPUs 23 context-switches # 0.003 M/sec 1 CPU-migrations # 0.000 M/sec 315 page-faults # 0.037 M/sec cycles instructions cache-references cache-misses 11.804293482 seconds time elapsed -- Jens Axboe