On 04/15/2012 07:49 AM, stef...@apache.org wrote:
Author: stefan2
Date: Sun Apr 15 14:49:21 2012
New Revision: 1326354
URL: http://svn.apache.org/viewvc?rev=1326354&view=rev
Log:
Disable the revprop cache if our sync. mechanisms are too expensive.
* subversion/include/private/svn_named_atomic.h
(svn_named_atomic__is_efficient): declare new API function
* subversion/libsvn_subr/svn_named_atomic.c
(SYNCHRONIZE_IS_FAST): new constant, set depending on system /
compiler capabilities
(svn_named_atomic__is_efficient): implement new API function
* subversion/libsvn_fs_fs/fs_fs.c
(has_revprop_cache): disable cache if sync is slow
Modified:
subversion/trunk/subversion/include/private/svn_named_atomic.h
subversion/trunk/subversion/libsvn_fs_fs/fs_fs.c
subversion/trunk/subversion/libsvn_subr/svn_named_atomic.c
+/** Returns #TRUE on platforms that don't need expensive synchronization
+ * objects to serialize access to named atomics. If this returns #FALSE,
+ * reading from or modifying a #svn_named_atomic__t may be as expensive
+ * as a file system operation.
That is assuming it's a local file system? It still may be faster than
getting a file from NFS, which people will host repositories on.
Blair
