From: Andi Gutmans [mailto:[EMAIL PROTECTED]]
Sent: 08 June 2002 13:59
On Fri, 7 Jun 2002, Ryan Bloom wrote:
On Fri, 7 Jun 2002, Brian Pane wrote:
On Fri, 2002-06-07 at 01:14, Sascha Schumann wrote:
The function php_apache_sapi_ub_write() is inserting a flush bucket
after each bucket
At 09:03 AM 6/10/2002, Sander Striker wrote:
Why is PHP even using its own memory allocation scheme? It would be much
easier to just use pools and point out where it doesn't work for you.
Because we don't want it depend on any underlying services which aren't
available in all servers. We can
On Mon, Jun 10, 2002 at 11:46:46AM +0300, Zeev Suraski wrote:
What we need for efficient thread-safe operation is a mechanism like the
Win32 heaps - mutexless heaps, that provide malloc and free services on a
(preferably) contiguous pre-allocated block of memory. The question is
whether
On Mon, Jun 10, 2002 at 09:29:58AM -0700, Aaron Bannert wrote:
- creation (called once per server lifetime)
- malloc (called many times per request)
- free (called many times per request)
- end-of-request (called many times per request)
(Whoops, that should have been -- called
At 07:29 PM 6/10/2002, Aaron Bannert wrote:
On Mon, Jun 10, 2002 at 11:46:46AM +0300, Zeev Suraski wrote:
What we need for efficient thread-safe operation is a mechanism like the
Win32 heaps - mutexless heaps, that provide malloc and free services on a
(preferably) contiguous pre-allocated
On Sun, Jun 09, 2002 at 03:09:24AM +0300, Zeev Suraski wrote:
Hmm, but doesn't that mean that the largest contiguous block this heap will
be able to provide is 8KB, then?
8K is just the minimum chunk size, there is no absolute maximum.
* There's a two-layer structure to the heaps:
-
At 12:53 PM 6/9/2002 -0700, Aaron Bannert wrote:
On Sun, Jun 09, 2002 at 03:09:24AM +0300, Zeev Suraski wrote:
Hmm, but doesn't that mean that the largest contiguous block this heap
will
be able to provide is 8KB, then?
8K is just the minimum chunk size, there is no absolute maximum.
*
At 09:12 PM 6/7/2002 -0700, Brian Pane wrote:
In case it's helpful to the PHP developers, here are
some more performance problems that I found by running
a quick system call profile of PHP-4.2.1 within
Apache-2.0.37-dev:
* php_request_shutdown() calls shutdown_memory_manager(), which
does a
At 10:41 AM 6/8/2002 +0300, Andi Gutmans wrote:
At 09:12 PM 6/7/2002 -0700, Brian Pane wrote:
In case it's helpful to the PHP developers, here are
some more performance problems that I found by running
a quick system call profile of PHP-4.2.1 within
Apache-2.0.37-dev:
* php_request_shutdown()
On Sat, Jun 08, 2002 at 02:03:21PM -0400, Cliff Woolley wrote:
If the unbuffered write really *is* allowed to be buffered (wtf?), then by
all means we should change to using apr_brigade_write() there instead of
the flush() buckets. The data that gets passed to ub_write() is transient
in
At 10:47 AM 6/8/2002 -0700, Brian Pane wrote:
Andi Gutmans wrote:
I just checked and it seems like Apache APR memory pools use mutex locking.
It'd be better to use functions like the Win32 ones which don't use mutex
locking (as we made sure that only one thread allocates from its pool).
This
PHP has its own buffering mechanism which can take care of this. Try
output_buffering = 4096 in your php.ini.
Zeev
At 08:33 PM 6/8/2002, Brian Pane wrote:
Looking at some more syscall call traces, I'm seeing that
the flush buckets used by php_apache_sapi_ub_write() are
causing very small
At 12:55 AM 6/9/2002, Brian Pane wrote:
I just looked through zend_alloc.c. It looks like the HeapCreate only
happens once, at startup--did I get that right?
It's called on the per-thread startup (start_memory_manager(), which is
called from alloc_globals_ctor(), which is the per-thread
At 02:57 AM 6/9/2002, Brian Pane wrote:
In the httpd, we've done two things to minimize the fragmentation:
* Memory for these heaps is almost always allocated in chunks of
a fixed size, 8KB.
Hmm, but doesn't that mean that the largest contiguous block this heap will
be able to provide is
At 04:57 PM 6/8/2002 -0700, Brian Pane wrote:
Zeev Suraski wrote:
At 12:55 AM 6/9/2002, Brian Pane wrote:
I just looked through zend_alloc.c. It looks like the HeapCreate only
happens once, at startup--did I get that right?
It's called on the per-thread startup (start_memory_manager(), which
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