| From: | Andrew Chernow <ac(at)esilo(dot)com> |
|---|---|
| To: | pgsql-patches(at)postgresql(dot)org |
| Subject: | libpq Win32 Mutex performance patch |
| Date: | 2008-04-11 18:41:40 |
| Message-ID: | 47FFB0E4.8040105@esilo.com |
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| Lists: | pgsql-patches |
I noticed several months ago, and came across it again today, that
libpq's pthread-win32.c implementation is using CreateMutex rather than
CRITICAL_SECTION. CreateMutex is like a semaphore in that it is
designed to be accessible via name system-wide. Even when you don't
give it a name, thus bound to process that created it, it still carries
significant overhead compared to using win32 CRITICAL_SECTIONs.
The attached patch replaces the win32 mutex calls with critical section
calls. The change will not affect the behavior of the windows
pthread_xxx functions.
--
Andrew Chernow
eSilo, LLC
every bit counts
http://www.esilo.com/
| Attachment | Content-Type | Size |
|---|---|---|
| win32_mutex.patch | text/plain | 2.0 KB |
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