From 279fedc1f8be794d8b38fe875a8671b5eef173ef Mon Sep 17 00:00:00 2001 From: David Cunado Date: Mon, 31 Jul 2017 12:24:51 +0100 Subject: [PATCH] Add usage note for FVP model versions 11.0 and 8.5 The internal synchronisation timings of the FVP model version 11.0 build 11.0.34 and version 8.5 build 0.8.5202 has been changed compared to older version of the models. This change may have an impact on how the model behaves depending on the workload being run on the model. For example test failures have been seen where the primary core has powered on a secondary core but was then starved of host CPU time and so was not able to update power status, resulting a test failure due to an incorrect status. This, or similar behaviour, is not to be expected from real hardware platforms. This patch adds a usage note on how to launch these models so that internal synchronisation timing matches that of the older version of the models, specifically adding the -Q 100 option. Change-Id: If922afddba1581b7246ec889b3f1598533ea1b7e Signed-off-by: David Cunado --- docs/user-guide.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/docs/user-guide.rst b/docs/user-guide.rst index bedbda82f..043af63ed 100644 --- a/docs/user-guide.rst +++ b/docs/user-guide.rst @@ -1397,6 +1397,11 @@ NOTE: FVPs can be launched with ``--cadi-server`` option such that a CADI-compliant debugger (for example, ARM DS-5) can connect to and control its execution. +NOTE: With FVP model Version 11.0 Build 11.0.34 and Version 8.5 Build 0.8.5202 +the internal synchronisation timings changed compared to older versions of the +models. The models can be launched with ``-Q 100`` option if they are required +to match the run time characteristics of the older versions. + The Foundation FVP is a cut down version of the AArch64 Base FVP. It can be downloaded for free from `ARM's website`_.