From 689af1d1a921de362cf0b3aa10158be39595fe79 Mon Sep 17 00:00:00 2001 From: Trond Einar Snekvik Date: Tue, 9 Feb 2016 14:29:52 +0100 Subject: [PATCH] Update changelog for 0.8.1 --- docs/changelog.adoc | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/docs/changelog.adoc b/docs/changelog.adoc index 5a33cd21..f7c0afc3 100644 --- a/docs/changelog.adoc +++ b/docs/changelog.adoc @@ -1,5 +1,15 @@ = Changelog +== 0.8.1 Stability improvement + +This release is a pure stability patch, and should mitigate some issues observed during testing: + +- When subjected to stress, the firmware sometimes shortcuts the handle cache linked list, excluding some handles from the pool of handles being transmitted. This is observable in the ping-pong example project if run with more than 10 devices: Devices stop getting updates from the central device one by one, until there is only one device left getting pings on its pongs. This was caused by a race condition, as the version handler had a hole in its thread safety. All manipulation of the cache-linked list is now serialized with the event-handler. This removed all symptoms from all our test cases, and the mesh performs much better under pressure. + +- The trickle timers for each handles had a possiblity of falling behind, leading to devices not being able to catch up with its timers. This issue only appeared when the mesh was tested under heavy stress (20+ devices within range of each other), and looked like non-stop spamming of packets. This issue is now mitigated, as the trickle timer is forced into a "future" timeout if the device catches up with a whole interval. + +- The bootloader "early-exit" check was moved to after the init-process, as the journal module had to be initialized to make sure that we weren't in the middle of a transaction. + == 0.8.0 Device Firmware Update over the Mesh Standalone Bootloader that supports Serial(UART) and Mesh (does not require the softdevice) PC tool support for DFU over the Mesh (https://github.com/NordicSemiconductor/pc-nrfutil)