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authorAaron Durbin <adurbin@chromium.org>2015-01-22 08:59:03 -0600
committerPatrick Georgi <pgeorgi@google.com>2015-03-20 09:59:19 +0100
commit8bbd04ea8d416b4ec952bf08f572f126ab7b4176 (patch)
treede93df873d8b27e0aaf454a7d1db5d5e68827519 /payloads/libpayload/libc/string.c
parentf72d328d1285cfbaef4c0e13199d9e668414e06d (diff)
downloadcoreboot-8bbd04ea8d416b4ec952bf08f572f126ab7b4176.tar.xz
libpayload: special case large memalign() requests
For memalign() requests the current allocator keeps metadata about each chunk of aligned memory that copmrises the size requested. For large allocations relative to the alignment this can cause significant metadata overhead. Instead, consider all memalign() requests whose size meets or exceeds 1KiB or alignment that meets or exceeds 1KiB large requests. These requests are handled specially to only allocate the amount of memory required for the size and alignment constraints by not allocating any metadata as the whole region would be consumed by the request. BUG=None BRANCH=None TEST=Built and tested various scenarios. Noted the ability to free() and properly coalesce the heap as expected. Change-Id: Ia9cf5529ca859e490617af296cffd2705c2c6fd8 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 4e32fc57626dac6194c9fd0141df680b4a5417e8 Original-Change-Id: Icdf022831b733e3bb84a2d2f3b499f4e25d89128 Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/242456 Original-Reviewed-by: Julius Werner <jwerner@chromium.org> Reviewed-on: http://review.coreboot.org/8729 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'payloads/libpayload/libc/string.c')
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