Performance problems are often observed in embedded software systems. The reasons for poor performance are frequently not obvious. Bottlenecks can occur in any of the software components along the execution path. Therefore it is important to instrument and monitor the different components contributing to the runtime behavior of an embedded software system. Performance analysis tools can help locate performance bottlenecks in embedded software systems by monitoring the software's execution and producing easily understandable performance data. We maintain and further develop a tool for analyzing the performance of Nokia mobile phone software. The user can select among four performance analysis reports to be generated: average processor load, processor utilization, task execution time statistics, and task execution timeline. Each of these reports provides important information about where execution time is being spent. The demo will show how the tool helps to identify performance bottlenecks in Nokia mobile phone software and better understand areas of poor performance.