opengnsys_ipxe

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Michael Brown 4a8a7bd91a [iobuf] Allocate I/O buffer descriptor separately to conserve aligned memory I/O buffers are allocated on aligned boundaries. The I/O buffer descriptor (the struct io_buffer) is currently attached to the end of the I/O buffer. When the size of the buffer is close to its alignment, this can waste large amounts of aligned memory. For example, a network card using 2048-byte receive buffers will end up allocating 2072 bytes on a 2048-byte boundary. This effectively wastes 50% of the available memory. Improve the situation by allocating the descriptor separately from the main I/O buffer if inline allocation would cause the total allocated size to cross the alignment boundary. Signed-off-by: Michael Brown <mcb30@ipxe.org>		2012-07-08 17:54:53 +01:00
contrib	[contrib] Update bochsrc.txt to latest version of bochs	2012-06-06 20:37:53 +01:00
src	[iobuf] Allocate I/O buffer descriptor separately to conserve aligned memory	2012-07-08 17:54:53 +01:00
COPYING	Initial revision	2005-05-17 16:44:57 +00:00
COPYRIGHTS	[build] Rename gPXE to iPXE	2010-04-19 23:43:39 +01:00
README	[doc] Re-add README file	2010-05-28 00:03:47 +01:00

iPXE README File

Quick start guide:

   cd src
   make

For any more detailed instructions, see http://ipxe.org