| commit | 25a28b4458b79989e2661d885d066a272ca7655b | |
| author | ak <ak@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Sat, 29 Oct 2011 01:02:35 +0000 (29 01:02 +0000) | ||
| committer | ak <ak@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Sat, 29 Oct 2011 01:02:35 +0000 (29 01:02 +0000) | ||
| tree | 8f9e002586202119430d4bd8c63fee062dce5c6a | treesnapshot (tar.gz zip) |
| parent | 4a2f812eeb7192c01faef17a3e0fa324f5faff33 | commitdiff |
Use more efficient alignment in ggc
Jakub had some concerns about the performance of page alignments in
ggc-page, which use a hardware division instructions currently.
This patch changes them all to use a new PAGE_ALIGN macro, which
exploits that pages are a power of two.
gcc/:
2011-10-21 Andi Kleen <ak@linux.intel.com>
* ggc-page (PAGE_ALIGN): Add.
(alloc_page, ggc_pch_total_size, ggc_pch_this_base, ggc_pch_read):
Replace ROUND_UP with PAGE_ALIGN.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@180650 138bc75d-0d04-0410-961f-82ee72b054a4
Jakub had some concerns about the performance of page alignments in
ggc-page, which use a hardware division instructions currently.
This patch changes them all to use a new PAGE_ALIGN macro, which
exploits that pages are a power of two.
gcc/:
2011-10-21 Andi Kleen <ak@linux.intel.com>
* ggc-page (PAGE_ALIGN): Add.
(alloc_page, ggc_pch_total_size, ggc_pch_this_base, ggc_pch_read):
Replace ROUND_UP with PAGE_ALIGN.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@180650 138bc75d-0d04-0410-961f-82ee72b054a4
| gcc/ChangeLog | diffblobblamehistory | |
| gcc/ggc-page.c | diffblobblamehistory |