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From jerenkra...@apache.org
Subject cvs commit: apr STATUS
Date Mon, 16 Jul 2001 08:06:14 GMT
jerenkrantz    01/07/16 01:06:14

  Modified:    .        STATUS
  SMS status updates.
  Revision  Changes    Path
  1.49      +21 -18    apr/STATUS
  Index: STATUS
  RCS file: /home/cvs/apr/STATUS,v
  retrieving revision 1.48
  retrieving revision 1.49
  diff -u -r1.48 -r1.49
  --- STATUS	2001/06/29 08:00:48	1.48
  +++ STATUS	2001/07/16 08:06:14	1.49
  @@ -1,5 +1,5 @@
  -Last modified at [$Date: 2001/06/29 08:00:48 $]
  +Last modified at [$Date: 2001/07/16 08:06:14 $]
  @@ -143,9 +143,17 @@
         - decide on a better name for the code
         - reformat to APR style (think this is now done, but some tabs left)
         - test on more systems
  -      - add to the default build as currently it's omitted.  Also need to
  -        add testmem to the test build at that point.
         - add more detailed tests to testmem.c
  +        Status: Optionally enable it with --enable-sms.  Still wildly 
  +                unproven.  But, it actually works as a replacement for 
  +                pools now.  (httpd works without pools.)
  +                There is a current (non-fatal, but silly) flaw in 
  +                the trivial SMS implementation that makes it add 4KB 
  +                to each level in the allocation chain.  This is bad. 
  +                Adding a child_malloc path has been discussed.  Making
  +                the apr_sms_pools.c call with 0 for MIN_FREE has been
  +                suggested.  As has rethinking which SMSs constitute an 
  +                old-style apr_pool_t.
       * In line with the new SMS code is the fact that threading and pools
         just are not working together well.  This is due to the fact that
  @@ -159,21 +167,16 @@
         to have an option for no locking (as they can't have contention
         by definition).  This would mean that the mutex and freelist
         must be moved inside of apr_pool_t.  Therefore, this is the 
  -      jumping-off point into SMS.  Short-term, it is *possible* that 
  -      ALLOC_USE_MALLOC would be faster than the current pool code for 
  -      a threaded APR (but, I'm not sure).
  -        Status: Justin volunteers
  -                David and Sander are working on some stuff that 
  -                should be ready Real Soon Now (TM).  Sander has
  -                posted a "trivial" SMS (what a bad name) - see:
  -                <JLEGKKNELMHCJPNMOKHOEEAFEBAA.striker@samba-tng.org>
  -                which uses the same memory management as the current 
  -                pool implementation (freelist that allocates any size).  
  -                David is finishing up prototyping a replacement for 
  -                apr_pool_t that is defined as an SMS (I believe it is
  -                API-compatible).  Not ready for prime-time, but ready 
  -                for us to start working out the kinks and actually 
  -                starting to use SMS.
  +      jumping-off point into SMS.  
  +        Justin: The SMS code has been checked into CVS (see above).
  +                To solve this problem, we want only one trivial SMS 
  +                per thread which acts as the parent for all SMSs in 
  +                that thread (giving us thread-local allocation).  
  +                Each descendant SMS should be something along the 
  +                lines of a tracking SMS.  That's how I see it anyway.
  +                There are other possibilities.  Any of those probably 
  +                work as well.  See the apr archives for more info.  
  +                We're still debating this.
   Documentation that needs writing:

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