From: mquinson Date: Thu, 20 Aug 2009 15:39:56 +0000 (+0000) Subject: release 3.3.3 X-Git-Tag: SVN~1061 X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/ca8a39f9679abcef3c5c546966e5144ec41f67c3?hp=444abc179efeaa1cfa259f967fc68a7c032fe5eb release 3.3.3 git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/simgrid/simgrid/trunk@6619 48e7efb5-ca39-0410-a469-dd3cf9ba447f --- diff --git a/ChangeLog b/ChangeLog index fcce2b7360..2630539095 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,6 +1,35 @@ -SimGrid (3.3.3-svn) unstable; urgency=low +SimGrid (3.3.3) stable; urgency=low - The "Desktop grid also matter" release. + The "Need for Speed" release. + + The timings done to validate the 3.3.2 were faulty. + Instead of being 5% faster, it was 15% slower (compared to 3.3.1). + + The problem was a conversion from a manually handled vector to + xbt_dynar_t on the critical path. + xbt_dynar_foreach calls functions, inducing stack management crap. + + We inlined these functions and xbt_dynar_foreach is now breath taking. + We also inlined xbt_swag_belong on the way. + + Here are some approximate speedup measurements (on master/slaves + simulations lasting between 10s and 20s each): + 3.3.1 -> 3.3.2: -15% + 3.3.2 -> 3.3.3: +40% + 3.3.1 -> 3.3.3: +40% + 3.3.1 with inline patch -> 3.3.3: +30% + + Our reading is that the refactoring which occurred in 3.3.2 made us + suffer much more from the xbt_dynar_foreach low performance, but + once we solved this, this refactoring proved to be very performance + effective. + + That's a pitty that gcc cannot inline functions placed in other files + alone. We have to choose between: + - break the encapsulation (by putting private data structures and + accessors in headers files to help gcc) + - live with low performance + - switch to a decent compiler such as icc (not quite possible). -- Da SimGrid team diff --git a/configure.ac b/configure.ac index a00c64e41e..bf3e689e6c 100644 --- a/configure.ac +++ b/configure.ac @@ -9,7 +9,7 @@ dnl GNU LGPL (v2.1) licence. ## AC_PREREQ(2.59) -AC_INIT([simgrid],[3.3.3-svn],[simgrid-devel@lists.gforge.inria.fr]) +AC_INIT([simgrid],[3.3.3],[simgrid-devel@lists.gforge.inria.fr]) AC_CONFIG_SRCDIR([include/gras.h]) AC_CONFIG_HEADERS([src/gras_config.h]) # A CI_PREREQ(2003.01.16) # We need a recent ACI when having sub-modules