- Add a facility similar to LOCK_PROFILING under SLEEPQUEUE_PROFILING. Keep

   a simple (wmesg, count) tuple in a hash to keep track of how many times
   we sleep at each wait message.  We hash on message and not channel.  No
   line number information is given as typically wait messages are not used in
   more than one place.  Identical strings defined at different addresses will
   show up with seperate counters.
 - Use debug.sleepq.enable to enable, .reset to reset, and .stats dumps stats.
 - Do an unsynchronized check in sleepq_switch() prior to switching before
   calling sleepq_profile() which uses a global lock to synchronize the hash.
   Only sleeps which actually cause a context switch are counted.

0 files changed, 0 insertions, 0 deletions