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Location: cpp/openttd-patchpack/source/svnup.sh - annotation
r13257:4c5b8120be59
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(svn r17776) -Codechange: [SDL] make "update the video card"-process asynchronious. Profiling with gprof etc. hasn't shown us that DrawSurfaceToScreen takes a significant amount of CPU; only using TIC/TOC it became apparant that it was a heavy CPU-cycle user or that it was waiting for something.
The benefit of making this function asynchronious ranges from 2%-25% (real time) during fast forward on dual core/hyperthreading-enabled CPUs; 8bpp improvements are, in my test cases, significantly smaller than 32bpp improvements.
On single core non-hyperthreading-enabled CPUs the extra locking/scheduling costs up to 1% extra realtime in fast forward. You can use -v sdl:no_threads to disable threading and undo this loss.
During normal non-fast-forwarded games the benefit/costs are negligable except when the gameloop takes more than about 90% of the time of a tick.
Note that allegro's performance does not improve with this system, likely due to their way of getting data to the video card. It is not implemented for the OS X/Windows video backends, unless (ofcourse) SDL is used there.
Funny is that the performance of the 32bpp(-anim) blitter is, at least in some test cases, significantly faster (more than 10%) than the 8bpp(-optimized) blitter when looking at real time in fast forward on a dual core CPU; it was slower.
The idea comes from a paper/report by Idar Borlaug and Knut Imar Hagen.
The benefit of making this function asynchronious ranges from 2%-25% (real time) during fast forward on dual core/hyperthreading-enabled CPUs; 8bpp improvements are, in my test cases, significantly smaller than 32bpp improvements.
On single core non-hyperthreading-enabled CPUs the extra locking/scheduling costs up to 1% extra realtime in fast forward. You can use -v sdl:no_threads to disable threading and undo this loss.
During normal non-fast-forwarded games the benefit/costs are negligable except when the gameloop takes more than about 90% of the time of a tick.
Note that allegro's performance does not improve with this system, likely due to their way of getting data to the video card. It is not implemented for the OS X/Windows video backends, unless (ofcourse) SDL is used there.
Funny is that the performance of the 32bpp(-anim) blitter is, at least in some test cases, significantly faster (more than 10%) than the 8bpp(-optimized) blitter when looking at real time in fast forward on a dual core CPU; it was slower.
The idea comes from a paper/report by Idar Borlaug and Knut Imar Hagen.
r335:17df698dbd68 r10729:809061d9ab58 r10729:809061d9ab58 r10729:809061d9ab58 r12768:980ae0491352 r12768:980ae0491352 r12768:980ae0491352 r12768:980ae0491352 r12768:980ae0491352 r0:d63b455452f6 r0:d63b455452f6 r0:d63b455452f6 r0:d63b455452f6 r1488:4c7f9f5f61fe r1488:4c7f9f5f61fe r1488:4c7f9f5f61fe r1488:4c7f9f5f61fe r0:d63b455452f6 r0:d63b455452f6 r0:d63b455452f6 r0:d63b455452f6 r0:d63b455452f6 r113:2741b4902d42 r113:2741b4902d42 r0:d63b455452f6 r0:d63b455452f6 r0:d63b455452f6 r0:d63b455452f6 r1583:f93a82637c0f r0:d63b455452f6 r113:2741b4902d42 r113:2741b4902d42 r113:2741b4902d42 r335:17df698dbd68 r1488:4c7f9f5f61fe r1488:4c7f9f5f61fe | #!/bin/sh
# $Id$
# This file is part of OpenTTD.
# OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
# OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
# This script updates the svn source and displays log changes
# This is only useful for users of CLI based SVN clients
# Written by Bjarni
[ "$PAGER" ] || PAGER=less
(
# reads what version you have now
Base=`svn info | grep "Revision" | xargs -n 1 | tail -n 1`
# updates the source
svn update > svn.log
cat svn.log
# if the revision number changed
if [ "$Base" -ne "`svn info | grep "Revision" | xargs -n 1 | tail -n 1`" ]; then
# displays the log changes
svn log -v -r HEAD:$(($Base + 1))
fi
# displays merged files
cat svn.log|grep "^G"
cat svn.log|grep "^C"
) | $PAGER
|