TY  - GEN
CY  - Reutlingen, Germany
KW  - profiling
KW  -  benchmarking
KW  -  tools
KW  -  distributed
KW  -  latency
ID  - discovery10048239
N2  - Real-time interactive systems such as virtual environments have high performance requirements, and profiling is a key part of the optimisation process to meet them. Traditional techniques based on metadata and static analysis have difficulty following causality in asynchronous systems. In this paper we explore a new technique for such systems. Timestamped samples of the system state are recorded at instrumentation points at runtime. These are assembled into a graph, and edges between dependent samples recovered. This approach minimises the invasiveness of the instrumentation, while retaining high accuracy. We describe how our instrumentation can be implemented natively in common environments, how its output can be processed into a graph describing causality, and how heterogeneous data sources can be incorporated into this to maximise the scope of the profiling. Across three case studies, we demonstrate the efficacy of this approach, and how it supports a variety of metrics for comprehensively bench-marking distributed virtual environments.
AV  - public
EP  - 245
A1  - Friston, SJ
A1  - Elias, G
A1  - Swapp, D
A1  - Marshall, A
A1  - Steed, A
UR  - http://dx.doi.org/10.1109/VR.2018.8446135
Y1  - 2018/08/30/
T3  - IEEE Conference on Virtual Reality and 3D User Interfaces
TI  - Profiling Distributed Virtual Environments by Tracing Causality
SP  - 238
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
PB  - IEEE
ER  -