From 444381c349aa8d1d0bdc61bba37465c428aab89f Mon Sep 17 00:00:00 2001 From: Augustin Degomme Date: Tue, 25 Feb 2020 11:48:46 +0100 Subject: [PATCH] changelog update --- ChangeLog | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/ChangeLog b/ChangeLog index fbc5d4c3ab..5206beefbb 100644 --- a/ChangeLog +++ b/ChangeLog @@ -2,6 +2,21 @@ SimGrid (3.25.1) UNRELEASED (target: March 20 2020 or v3.26 on 3/26/20) +Important user-visible changes: +- Surf precision default value is now 1e-9, instead of 1e-5. This was changed as + several users had difficult to understand issues when using high bandwidth or + small latency events. The new value was already the default for SMPI and + should not cause too much performance hit. It can change some simulation + timings if simulation was skipping a lot of small events (which was actually + an issue of said simulation). The value can still be changed back using + --cfg=surf/precision:1e-5 + +General: +- LTO is now enabled for Intel/clang compilers. +- LTO behavior on GCC can be parametrized using LTO_EXTRA_FLAG in cmake. + Setting it to "auto" will use all available cores, while setting it to n will + use n cores to speedup link step (usage: cmake -DLTO_EXTRA_FLAG=4). + C interface: - Many MSG tests were converted to the new S4U's interface in C, that was extended for that. -- 2.20.1