6Mb of memory taken up by glDrawElements
Post: #1
I have call the following function in my code.
This one line makes 6mb of difference to my memory footprint. It doesn't matter where I call it, nor how many times. It always takes 6Mb. This seems curious to me. Reading through the documentation, I can't find anything saying this function automatically creates a copy of your pre-allocated buffers in system memory. Anyone else found this?
FYI, I'm using the following code to find out where my memory is going:
The reason I'm using this is that since the 3.1 update I can't run my app on hardware directly from XCode, thus removing the possibility of using several Instruments. I'm trying to track that down, too...
Code:
glDrawElements(GL_TRIANGLES, VERTEX_INDICES_PER_SPRITE, GL_UNSIGNED_SHORT, myIndexArray);This one line makes 6mb of difference to my memory footprint. It doesn't matter where I call it, nor how many times. It always takes 6Mb. This seems curious to me. Reading through the documentation, I can't find anything saying this function automatically creates a copy of your pre-allocated buffers in system memory. Anyone else found this?
FYI, I'm using the following code to find out where my memory is going:
Code:
int MemoryReport(void)
{
struct task_basic_info info;
mach_msg_type_number_t size = sizeof(info);
kern_return_t kerr = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)&info, &size);
if( kerr == KERN_SUCCESS )
{
return(info.resident_size);
}
else
{
return(-1);
}
}The reason I'm using this is that since the 3.1 update I can't run my app on hardware directly from XCode, thus removing the possibility of using several Instruments. I'm trying to track that down, too...
Post: #2
Which instruments work only when launched from XCode? I've never used XCode to connect Instruments or Shark to my application.
Scott Lembcke - Howling Moon Software
Author of Chipmunk Physics - A fast and simple rigid body physics library in C.
Post: #3
Wow... what a massive numpty I be. It never occurred to me to run Instruments outside of XCode. All this time I've assumed that everything but 'Shark' is an integral part of XCode. That helps a lot. :-)
[Edit] To add to my already impressive idiocy score, I found that this memory chunk issue only exists in the simulator.
[Edit] To add to my already impressive idiocy score, I found that this memory chunk issue only exists in the simulator.
Possibly Related Threads...
| Thread: | Author | Replies: | Views: | Last Post | |
| glDrawElements help | wonza | 6 | 5,816 |
Apr 18, 2009 08:44 AM Last Post: AnotherJake |
|