--- title: "Corvil AppAgent | Application Event Visibility | Pico" description: "Low-overhead precision visibility of application events: Up to 20M events/sec per host with nanosecond timestamps, supporting C++, C, and Java for multi-hop wire-app-wire latency measurement." source: https://www.pico.net/products/corvil-analytics/corvil-app-agent/ markdown_url: https://www.pico.net/products/corvil-analytics/corvil-app-agent.md --- # Corvil AppAgent Low-overhead precision visibility of application events: a software library that keeps your code clean, lean, and fast while eliminating traditional agent blind spots such as network stack latency, garbage collection, and process scheduling. - Sustain up to 20M events/sec per host with buffering for higher bursts - Wire-app-wire latency measurement for full end-to-end visibility - Nanosecond-precision hardware timestamps with lowest application overhead - Simple API supporting C, C++, and Java with minimal dependencies ## What is Corvil AppAgent? Corvil AppAgent delivers precision visibility of application events with ultra-low overhead. The agent efficiently serializes, batches, and publishes time-stamped application events to enable application and transaction transparency, event reporting, and performance optimization. Combined with Corvil Analytics network visibility, it eliminates traditional agent blind spots such as network stack latency, garbage collection, and process scheduling. ## Capabilities and related products ### 10M Events/Sec Publish up to 10M events/sec per publisher thread, with buffering for higher bursts. ### 360-Degree View AppAgent events integrate with wire timestamp events for a combined network and application performance view. ### Corvil Sensor Packet-level network visibility that complements AppAgent for full wire-app-wire latency measurement. ### Trading Analytics The Corvil Analytics platform that AppAgent events integrate with for combined network-application intelligence. ### Corvil APIs & SDK Build custom decoders and automate workflows using the same open architecture as AppAgent. ## Use cases for Corvil AppAgent ### DevOps Production Monitoring - Low overhead means same visibility in production as in dev environments - Single toolset for monitoring performance across dev and production ### Application Performance - Reliable microsecond performance visibility in application development and test - Identify latency hotspots invisible to network-only monitoring ### Wire-App-Wire Latency - Measure accurate wire-app-wire latency for full end-to-end visibility - Track trigger event on wire to decision in app to response on wire (e.g. tick-to-order) ### Compliance Reporting - UTC-synchronized reportable events from point of decision within trading apps - Minimum disruption and overhead for compliance data capture ## Frequently asked questions Everything you need to know about Corvil AppAgent. ### What is Corvil AppAgent? Corvil AppAgent is a software library that provides precision visibility of application events with ultra-low overhead. It efficiently serializes, batches, and publishes time-stamped events from within your application, enabling transaction transparency, performance optimization, and compliance reporting. It supports C, C++, and Java with a simple API. ### What is wire-app-wire latency measurement? Wire-app-wire latency measures the full end-to-end path: from a trigger event arriving on the wire, through the decision point within the application, to the response leaving on the wire. For example, measuring tick-to-order latency, from market data tick received to order transmitted. This requires combining Corvil network timestamps with AppAgent application timestamps. ### What is the performance impact on trading applications? Corvil AppAgent generates accurate timestamps with the absolute lowest application overhead. It can sustain up to 10M events/sec per publisher thread and buffers data to support higher bursts. The lightweight design means you can afford to deploy the same instrumentation in production as in development environments. ### What languages does Corvil AppAgent support? AppAgent supports C, C++, and Java with a simple, easy-to-use API. The SDK includes minimal dependencies and example code to accelerate integration into your trading applications. ### How does AppAgent work with Corvil network analytics? AppAgent events integrate with Corvil wire timestamp events for a combined 360-degree network and application performance view. This eliminates traditional agent blind spots such as network stack latency, garbage collection, and process scheduling, providing true end-to-end visibility. ### Can AppAgent be used for compliance reporting? Yes. AppAgent generates UTC-synchronized reportable events from the point of decision within trading applications. The minimum disruption and overhead design means compliance data capture does not impact trading performance. ### How does AppAgent differ from Corvil Sensor? Corvil Sensor provides packet-level network visibility by capturing traffic at the virtual or physical network layer. AppAgent instruments application-level events from within your code. Together they provide wire-app-wire measurement: the full end-to-end latency path from network to application and back. ## Instrument your trading applications Talk to a Corvil specialist about deploying AppAgent for application-level performance visibility.